CN111376700A - Hybrid power coupling system and vehicle - Google Patents
Hybrid power coupling system and vehicle Download PDFInfo
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- CN111376700A CN111376700A CN201811619692.2A CN201811619692A CN111376700A CN 111376700 A CN111376700 A CN 111376700A CN 201811619692 A CN201811619692 A CN 201811619692A CN 111376700 A CN111376700 A CN 111376700A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
- B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/38—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention discloses a hybrid power coupling system and a vehicle, wherein the hybrid power coupling system comprises an engine, a motor, a first planet row, a second planet row, a first brake, a second clutch, a third clutch and an input shaft; the first planet row comprises a first sun gear, a first planet carrier and a first gear ring, the second planet row comprises a second sun gear, a second planet carrier and a second gear ring, the first planet carrier is connected with the second gear ring, and the first gear ring is connected with the second planet carrier; the engine and the motor are both connected to the input shaft; the input shaft is connected with the first sun gear through a second clutch, and the input shaft is connected with the second planet carrier through a third clutch; the first brake is used for braking the second planet carrier, and the second brake is used for braking the second sun gear; the first planet carrier outputs power to wheels; the system load is reduced, multiple driving modes can be realized, the transmission efficiency is higher, and the power performance and the economy of the whole vehicle are improved.
Description
Technical Field
The invention belongs to the field of new energy automobiles, and particularly relates to a hybrid power coupling system and a vehicle.
Background
The power system comprises an engine (internal combustion engine) and a transmission system consisting of a transmission, a differential and a transmission shaft; its function is to provide the vehicle with the driving power required for the driving wheels. Internal combustion engines have a range of speeds and torques and achieve optimum operation within a small range, with minimum fuel consumption, minimum harmful emissions, or both. However, the actual road conditions vary greatly, and they are reflected not only in the speed of the driving wheels, but also in the torque required by the driving wheels. Therefore, it is the primary task of the transmission to achieve the optimum speed and torque of the internal combustion engine, i.e., the optimum power state, and match the power state of the driving wheels well.
The transmissions on the market at present mainly comprise a step transmission and a continuously variable transmission. Step-variable transmissions are subdivided into manual and automatic. They most provide a limited number of discrete output-to-input speed ratios through different meshing arrangements of gear trains or planetary gear trains. The speed of the drive wheels between two adjacent speed ratios is adjusted by means of the speed variation of the internal combustion engine. Continuously variable transmissions, whether mechanical, hydraulic, or electro-mechanical, provide an infinite number of continuously selectable speed ratios over a range of speeds, and theoretically, the speed change of the drive wheels can be accomplished entirely through the transmission. In this way, the internal combustion engine can be operated in the optimum speed range as much as possible. Meanwhile, compared with a stepped transmission, the stepless transmission has the advantages of stable speed regulation, full utilization of the maximum power of an internal combustion engine and the like, so that the stepless transmission is a subject of research of engineers in various countries for many years.
In recent years, the emergence of motor hybrid technology has opened up a new approach for achieving complete matching of power between an internal combustion engine and a power wheel. Among the many designs of powertrain, the most representative are the series hybrid system and the parallel hybrid system. In the series hybrid system of the electric motor, a generator of the internal combustion engine, a motor, a shafting and a driving wheel form a series power chain, and the structure of the power assembly is extremely simple. Wherein the generator-motor combination can be considered as a transmission in the conventional sense. When used in combination with an energy storage device, such as a battery, capacitor, etc., the transmission may also function as an energy modulation device to accomplish independent speed and torque modulation.
The motor parallel system is provided with two parallel independent power chains. One consisting of a conventional mechanical transmission and the other consisting of an electric motor-battery system. The mechanical transmission is responsible for speed regulation, while the electric machine-battery system regulates power or torque. In order to fully develop the potential of the whole system, the mechanical transmission also needs to adopt a stepless speed change mode.
The serial hybrid system has the advantages of simple structure and flexible layout. However, since all power passes through the generator and the motor, the power requirement of the motor is high, the volume is large, and the weight is heavy. Meanwhile, the energy transmission process is converted by two machines, namely electricity and machine, so that the efficiency of the whole system is low. In a parallel hybrid system, only a portion of the power passes through the electric machine system, and therefore, the power requirements on the electric machine are relatively low. The efficiency of the whole system is high. However, the system needs two sets of independent subsystems and is high in manufacturing cost. Typically only for weak mixing systems.
The existing power coupling system comprises two motors, a compound planet row consisting of a first planet row and a second planet row, wherein the first planet row comprises a first sun gear and a first planet carrier, the second planet row comprises a second sun gear and a second planet carrier, the first planet row and the second planet row share a gear ring, the first sun gear is connected with a generator, the first planet carrier is connected with an engine, the gear ring is connected with a difference reducer, the second sun gear is connected with a driving motor, and the second planet carrier is connected with a second brake; although the scheme can realize the working modes of pure electric drive, hybrid drive and the like by reasonably controlling the related power sources, the direct drive mode of the engine cannot be realized. For a power splitting system, the E-CVT mode is only at medium and low speed, the system efficiency is high, and the economy is good; the system which is in a medium-high speed mode and an engine direct-drive mode is high in efficiency and good in economy, so that the existing scheme of the engine direct-drive mode cannot be realized, and the power performance and the economy are inevitably insufficient.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problem that the dynamic property and the economical efficiency of the power coupling system in the existing scheme are insufficient, the hybrid power coupling system and the vehicle are provided.
In order to solve the technical problem, an embodiment of the present invention provides a hybrid coupling system, including an engine, a motor, a first planetary gear train, a second planetary gear train, a first brake, a second clutch, a third clutch, and an input shaft; the first planet row comprises a first sun gear, a first planet carrier and a first gear ring, the second planet row comprises a second sun gear, a second planet carrier and a second gear ring, the first planet carrier is connected with the second gear ring, and the first gear ring is connected with the second planet carrier;
the engine and the motor are both connected to the input shaft;
the input shaft is connected with the first sun gear through the second clutch, and the input shaft is connected with the second planet carrier through the third clutch;
the first brake is used for braking the second planet carrier, and the second brake is used for braking the second sun gear;
the first carrier outputs power to the wheels.
Optionally, the engine further comprises a first clutch, and the rotating shaft of the engine is connected with the input shaft through the first clutch.
Optionally, the first sun gear and the second sun gear are rotatably arranged on the input shaft;
the second clutch with the third clutch is integrated into the double clutch of sharing clutch housing, the double clutch is located first sun gear with between the second sun gear, clutch housing locates on the input shaft.
Optionally, the gearbox further comprises an intermediate shaft and a first gear arranged on the intermediate shaft, and the first planet carrier is meshed with the first gear;
the intermediate shaft or the first gear outputs power to wheels.
Optionally, the hybrid coupling system further comprises a second gear fixed on the intermediate shaft and a third gear used for connecting to a differential, the first gear is fixed on the intermediate shaft, the third gear is meshed with the second gear, the transmission ratio of the first gear to the first planet carrier is less than 1, and the transmission ratio of the third gear to the second gear is less than 1; or
The hybrid coupling system further comprises a third gear connected to the differential, the third gear is meshed with the first gear, the transmission ratio of the first gear to the first planet carrier is smaller than 1, and the transmission ratio of the third gear to the first gear is smaller than 1.
Optionally, the input shaft is connected with the motor in a speed increasing mode through a speed increasing gear set.
Optionally, the speed increasing gear set is a third planet row comprising a third sun gear, a third planet carrier and a third ring gear;
the engine and the motor are coaxially arranged, one end of the input shaft is connected to the engine, the other end of the input shaft is connected to the third planet carrier, the third sun gear is connected to the motor, and the third gear ring is fixed.
Optionally, the hybrid coupling system has a first pure electric mode, a second pure electric mode, a third pure electric mode, a fourth pure electric mode, a first hybrid driving mode, a second hybrid driving mode, a third hybrid driving mode, a fourth hybrid driving mode, a first engine direct driving mode, a second engine direct driving mode, a third engine direct driving mode, and a fourth engine direct driving mode;
engaging the second clutch, disengaging the third clutch, engaging the first brake, disengaging the second brake, the engine is not operating, and the electric machine is driven to establish the first electric-only mode;
engaging the second clutch, disengaging the third clutch, disengaging the first brake, engaging the second brake, the engine not operating, the electric machine driving to establish the second electric-only mode;
engaging the second clutch, engaging the third clutch, disengaging the first brake, disengaging the second brake, the engine is not operating, and the electric machine is driven to establish the third electric-only mode;
disengaging the second clutch, engaging the third clutch, disengaging the first brake, engaging the second brake, the engine not operating, the electric machine driving to establish the fourth electric-only mode;
engaging the second clutch, disengaging the third clutch, engaging the first brake, disengaging the second brake, the engine drive, the electric machine accessory drive to establish the first hybrid drive mode;
engaging the second clutch, disengaging the third clutch, disengaging the first brake, engaging the second brake, the engine driving, the electric machine accessory driving to establish the second hybrid drive mode;
engaging the second clutch, engaging the third clutch, disengaging the first brake, disengaging the second brake, the engine drive, the electric machine accessory drive to establish the third hybrid drive mode;
disengaging the second clutch, engaging the third clutch, disengaging the first brake, engaging the second brake, the engine driving, the electric machine accessory driving to establish the fourth hybrid drive mode;
the second clutch is combined, the third clutch is separated, the first brake is combined, the second brake is separated, the engine is driven, the motor does not work or generates power under the driving of the engine, so that the first engine direct drive mode is established;
the second clutch is combined, the third clutch is separated, the first brake is separated, the second brake is combined, the engine is driven, the motor does not work or generates power under the driving of the engine, so that the direct drive mode of the second engine is established;
the second clutch is combined, the third clutch is combined, the first brake is separated, the second brake is separated, the engine is driven, the motor does not work or generates power under the driving of the engine, so that the third engine direct drive mode is established;
and separating the second clutch, combining the third clutch, separating the first brake, combining the second brake, driving the engine, and generating power by the motor without work or under the driving of the engine to establish the fourth engine direct drive mode.
Optionally, when the first clutch is provided, the hybrid coupling system has a first pure electric mode, a second pure electric mode, a third pure electric mode, a fourth pure electric mode, a first hybrid driving mode, a second hybrid driving mode, a third hybrid driving mode, a fourth hybrid driving mode, a first engine direct driving mode, a second engine direct driving mode, a third engine direct driving mode, and a fourth engine direct driving mode;
disengaging the first clutch, engaging the second clutch, disengaging the third clutch, engaging the first brake, disengaging the second brake, the engine is not operating, the electric machine is driven to establish the first electric-only mode;
disengaging the first clutch, engaging the second clutch, disengaging the third clutch, disengaging the first brake, engaging the second brake, the engine not operating, the electric machine driving to establish the second electric-only mode;
disengaging the first clutch, engaging the second clutch, engaging the third clutch, disengaging the first brake, disengaging the second brake, the engine is not operating, the electric machine is driven to establish the third electric-only mode;
disengaging the first clutch, disengaging the second clutch, engaging the third clutch, disengaging the first brake, engaging the second brake, the engine not operating, the electric machine driving to establish the fourth electric-only mode;
engaging the first clutch, engaging the second clutch, disengaging the third clutch, engaging the first brake, disengaging the second brake, the engine drive, the electric machine accessory drive to establish the first hybrid drive mode;
engaging the first clutch, engaging the second clutch, disengaging the third clutch, disengaging the first brake, engaging the second brake, the engine drive, the electric machine accessory drive to establish the second hybrid drive mode;
engaging the first clutch, engaging the second clutch, engaging the third clutch, disengaging the first brake, disengaging the second brake, the engine drive, the electric machine accessory drive to establish the third hybrid drive mode;
engaging the first clutch, disengaging the second clutch, engaging the third clutch, disengaging the first brake, engaging the second brake, the engine drive, the electric machine accessory drive to establish the fourth hybrid drive mode;
the first clutch is combined, the second clutch is combined, the third clutch is separated, the first brake is combined, the second brake is separated, the engine is driven, the motor does not work or generates power under the driving of the engine, so that the first engine direct drive mode is established;
the first clutch is combined, the second clutch is combined, the third clutch is separated, the first brake is separated, the second brake is combined, the engine is driven, the motor does not work or generates power under the driving of the engine, so that the direct drive mode of the second engine is established;
the first clutch is combined, the second clutch is combined, the third clutch is combined, the first brake is separated, the second brake is separated, the engine is driven, the motor does not work or generates power under the driving of the engine, so that the direct drive mode of the third engine is established;
the first clutch is combined, the second clutch is separated, the third clutch is combined, the first brake is separated, the second brake is combined, the engine is driven, and the motor does not work or generates power under the driving of the engine to establish the fourth engine direct drive mode.
The embodiment of the invention provides a vehicle, which comprises a controller and a battery connected to the controller; the hybrid coupling system is characterized in that the hybrid coupling system further comprises the engine and the motor which are connected to and controlled by the controller.
According to the hybrid power coupling system and the vehicle provided by the embodiment of the invention, the CR-CR compound planetary line (namely the first planetary line and the second planetary line) is arranged, and the four-gear speed ratio switching of the CR-CR compound planetary line can be realized by controlling the working states (combination or separation) of the first brake, the second clutch and the third clutch, so that the motor or the engine has four gears when driving the wheels, the engine and the motor can both drive the wheels, the engine can also drive the motor to generate electricity, various driving modes can be realized, each driving mode has multiple gears, the power performance of the whole vehicle is obviously improved, and the economy of the vehicle is improved;
the engine and the motor share the CR-CR compound planet row for speed change, the structure is simple and compact, the number of parts is reduced, the system load is reduced, the power performance of the whole vehicle is improved, the volume is reduced, and the cost of the speed reduction assembly is reduced;
in a hybrid driving mode, the speed can be regulated through a CR-CR composite planetary row, the working interval of an engine is optimized, and the vehicle economy is improved;
and a motor is arranged for driving or generating electricity, so that the system cost is low.
Drawings
FIG. 1 is a schematic diagram of a hybrid coupling system according to an embodiment of the present invention;
FIG. 2 is a power transmission scheme of the hybrid coupling system of FIG. 1 in a first electric-only mode;
FIG. 3 is a collinear diagram of the hybrid coupling system shown in FIG. 1 in a first electric-only mode;
FIG. 4 is a power transmission scheme of the hybrid coupling system of FIG. 1 in a second electric-only mode;
FIG. 5 is a collinear diagram of the hybrid coupling system shown in FIG. 1 in a second electric-only mode;
FIG. 6 is a power transmission route diagram of the hybrid coupling system of FIG. 1 in a third electric-only mode;
FIG. 7 is a collinear diagram of the hybrid coupling system shown in FIG. 1 in a third electric-only mode;
FIG. 8 is a power transmission route diagram of the hybrid coupling system of FIG. 1 in a fourth electric-only mode;
FIG. 9 is a collinear diagram of the hybrid coupling system shown in FIG. 1 in a fourth electric-only mode;
FIG. 10 is a power transmission route diagram of the hybrid coupling system of FIG. 1 in a first hybrid drive mode;
FIG. 11 is an alignment chart of the hybrid coupling system of FIG. 1 in a first hybrid drive mode;
FIG. 12 is a power transmission route diagram of the hybrid coupling system of FIG. 1 in a second hybrid drive mode;
FIG. 13 is an alignment chart of the hybrid coupling system of FIG. 1 in a second hybrid drive mode;
FIG. 14 is a power transmission route diagram of the hybrid coupling system of FIG. 1 in a third hybrid drive mode;
FIG. 15 is an alignment chart of the hybrid coupling system of FIG. 1 in a third hybrid driving mode;
FIG. 16 is a power transmission route diagram of the hybrid coupling system of FIG. 1 in a fourth hybrid drive mode;
FIG. 17 is an alignment chart of the hybrid coupling system of FIG. 1 in a fourth hybrid driving mode;
FIG. 18 is a schematic illustration of a second configuration of a hybrid coupling system in accordance with an embodiment of the present invention;
the reference numerals in the specification are as follows:
1. an engine; 2. a generator;
3. a first planet row; 31. a first sun gear; 33. a first carrier; 34. a first ring gear;
4. a second planet row; 41. a second sun gear; 43. a second planet carrier; 44. a second ring gear;
5. a first clutch; 6. a second clutch; 7. a third clutch; 8. a first brake; 9. a second brake;
10. an input shaft; 11. an intermediate shaft; 12. a first gear; 13. a second gear; 14. a third gear;
15. a third planet row; 151. a third sun gear; 153. a third carrier; 154. a third ring gear;
17. a differential mechanism; 18. and (7) wheels.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and 18, a hybrid coupling system according to an embodiment of the present invention includes an engine 1, a motor 2, a first planetary gear set 3, a second planetary gear set 4, a first brake 8, a second brake 9, a second clutch 6, a third clutch 7, and an input shaft 10; the first planetary row 3 comprises a first sun gear 31, a first planet carrier 33 and a first ring gear 34, the second planetary row 4 comprises a second sun gear 41, a second planet carrier 43 and a second ring gear 44, the first planet carrier 33 is connected with the second ring gear 44, and the first ring gear 34 is connected with the second planet carrier 43;
the engine 1 and the motor 2 are both connected to an input shaft 10;
the input shaft 10 is connected with the first sun gear 31 through the second clutch 6, and the input shaft 10 is connected with the second planet carrier 43 through the third clutch 7;
the first brake 8 is used for braking the second planet carrier 43, and the second brake 9 is used for braking the second sun gear 41;
the first carrier 33 outputs power to the wheels 18.
The first planet row 3 and the second planet row 4 are connected to form an integral structure, namely a CR-CR composite planet row.
When in use, the second clutch 6 is combined, the third clutch 7 is separated, the first brake 8 is combined, and the second brake 9 is separated; or, the second clutch 6 is combined, the third clutch 7 is separated, the first brake 8 is separated, and the second brake 9 is combined; or, the second clutch 6 is combined, the third clutch 7 is combined, the first brake 8 is separated, and the second brake 9 is separated; or, the second clutch 6 is disengaged, the third clutch 7 is engaged, the first brake 8 is disengaged, and the second brake 9 is engaged; by controlling the four working states of the clutch (broadly, the second clutch 6 and the third clutch 7) and the brake (broadly, the first brake 8 and the second brake 9), four speed ratios of power transmitted by the CR-CR compound planetary line can be realized, so that four gears can be realized when the engine 1 or the motor 2 drives the wheel 18, and the engine 1 and the motor 2 can drive the wheel 18 independently or drive the wheel 18 together;
when the engine 1 and the motor 2 participate in driving together, the input shaft 10 and the CR-CR compound planetary line function as a coupling power and transmit the coupled power to the wheels 18.
The hybrid power coupling system provided by the embodiment of the invention is provided with the CR-CR compound planetary line, and the four-gear speed ratio switching of the CR-CR compound planetary line can be realized by controlling the working states (combination or separation) of the first brake 8, the second brake 9, the second clutch 6 and the third clutch 7, so that the motor 2 or the engine 1 has four gears when driving the wheel 18, the engine 1 and the motor 2 can both drive the wheel 18, the engine 1 can also drive the motor 2 to generate electricity, various driving modes can be realized, each driving mode has multiple gears, the power performance of the whole vehicle is obviously improved, and the vehicle economy is improved;
the engine 1 and the motor 2 share the CR-CR compound planetary row for speed change, the structure is simple and compact, the number of parts is reduced, the system load is reduced, the power performance of the whole vehicle is improved, the volume is reduced, and the cost of a speed reduction assembly is reduced;
in a hybrid driving mode, the working interval of the engine 1 can be optimized by the speed regulation of the CR-CR composite planet row, and the vehicle economy is improved;
the motor 2 is arranged for driving or generating electricity, and the system cost is low.
The motor 2 is an electric motor (M/G) and can be used for generating power and driving.
Specifically, the motor 2 also functions as a starter motor for starting the engine 1. If the motor 2 is not driven and does not generate power and the engine 1 is driven, the motor 2 stops working after starting the engine 1; if the motor 2 is driven or generates power and the engine 1 is driven, the motor 2 keeps working after starting the engine 1.
For the sake of simplicity and stability, it is preferable that the first carrier 33 and the second ring gear 44 are formed as a single body, and the first ring gear 34 and the second carrier 43 are formed as a single body.
In one embodiment, as shown in fig. 1 and 18, a first clutch 5 is further included, and a rotating shaft of the engine 1 is connected to the input shaft 10 through the first clutch 5. Whether the engine 1 works or not is controlled by controlling the on-off of the first clutch 5; when the engine 1 is required to drive the wheels 18 or the motor 2 to generate power, the first clutch 5 is combined, and when the engine 1 is not required to work, the first clutch 5 is separated to reduce the system load and protect the engine 1.
In one embodiment, as shown in fig. 1 and 18, the first sun gear 31 and the second sun gear 41 are rotatably disposed on the input shaft 10, which is beneficial to improving the structural stability and the transmission smoothness of the CR-CR compound planetary row.
In one embodiment, as shown in fig. 1 and 18, the second clutch 6 and the third clutch 7 are integrated into a dual clutch that shares a clutch housing provided on the input shaft 10 between the first sun gear 31 and the second sun gear 41. The structure is simpler and more compact, and the miniaturization of the hybrid power coupling system and the reduction of the system load are facilitated.
Further, as shown in fig. 1 and 18, the hybrid coupling system further includes a differential 17, the first carrier 33 is connected to the differential 17, and the differential 17 drives the wheels 18.
In one embodiment, as shown in fig. 1 and 18, the power transmission device further comprises an intermediate shaft 11 and a first gear 12 arranged on the intermediate shaft 11, the first planet carrier 33 is meshed with the first gear 12, and the intermediate shaft 11 or the first gear 12 outputs power to the wheels 18. The structure is simple, and the power can be transmitted to the wheels 18.
In one embodiment, a third gear 14 is further included for connection to a differential 17, the third gear 14 being in mesh with the first gear 12; the power output from the first carrier 33 is transmitted to the differential 17 through the first gear 12 and the third gear 14, so that the first gear 12 outputs power to the wheels 18 (referring to fig. 1, the second gear 13 in fig. 1 is eliminated, and the first gear 12 is meshed with the third gear 14).
The transmission ratio of the first gear 12 to the first planet carrier 33 is preferably less than 1, the first planet carrier 33 and the first gear 12 form a primary reduction gear pair, the transmission ratio of the third gear 14 to the first gear 12 is also preferably less than 1, and the first gear 12 and the third gear 14 form a primary reduction gear pair; through the preferable scheme, the power output by the CR-CR compound planetary row is subjected to one-stage or two-stage speed reduction and then is transmitted to the differential 17, so that the speed reduction output of the power generation or the motor 2 is realized, the structure is simplified, and the power requirement of the wheels 18 can be better matched. More preferably, the reduction gear pair composed of the first gear 12 and the third gear 14 is set as a main reduction gear pair of the hybrid coupling system.
In one embodiment, as shown in fig. 1 and 18, the hybrid coupling system further includes a second gear 13 fixed on the intermediate shaft 11 and a third gear 14 for connecting to the differential 17, the first gear 12 is fixed on the intermediate shaft 11, and the third gear 14 is meshed with the second gear 13; the power output by the first carrier 33 is transmitted to the intermediate shaft 11 through the first gear 12, then transmitted to the second gear 13 and the third gear 14 through the intermediate shaft 11, and then transmitted to the differential 17, so that the intermediate shaft 11 outputs power to the wheels 18.
The transmission ratio of the first gear 12 to the first planet carrier 33 is preferably less than 1, the first planet carrier 33 and the first gear 12 form a primary reduction gear pair, the transmission ratio of the third gear 14 to the second gear 13 is also preferably less than 1, and the second gear 13 and the third gear 14 form a primary reduction gear pair; through the preferable scheme, the power output by the CR-CR compound planetary row is subjected to one-stage or two-stage speed reduction and then is transmitted to the differential 17, so that the speed reduction output of the power generation or the motor 2 is realized, the structure is simplified, and the power requirement of the wheels 18 can be better matched. More preferably, a reduction gear pair composed of the second gear 13 and the third gear 14 is set as a main reduction gear pair of the hybrid coupling system.
In one embodiment, as shown in fig. 1 and 18, the engine 1 and the motor 2 are coaxially disposed and respectively located at two ends of the input shaft 10; the structure is simple and compact, the system load is reduced, and the transmission stability of the CR-CR composite planetary row is improved.
In one embodiment, the input shaft 10 is connected with the motor 2 through a speed increasing gear set, the input shaft 10 is connected with the motor 2, the speed is increased and the torque is decreased through a primary gear pair (speed increasing gear pair) from the input shaft 10 to the motor 2, the size of the motor 2 can be effectively reduced, and when the motor 2 participates in driving, the speed is decreased and the torque is increased from the motor 2 to the input shaft 10 through the speed increasing gear pair.
Specifically, not shown, the speed-increasing gear pair includes a fifth gear provided on the input shaft 10 and a sixth gear provided on the rotating shaft of the motor 2, and the fifth gear is engaged with the sixth gear; the structure is simple and compact, the system load is reduced, and the transmission stability is ensured.
Preferably, as shown in fig. 18, the speed increasing gear set is the third planetary row 15, and the third planetary row 15 includes a third sun gear 151, a third carrier 153, and a third ring gear 154;
the engine 1 is disposed coaxially with the motor 2, one end of the input shaft 10 is connected to the engine 1, the other end is connected to the third carrier 153, the third sun gear 151 is connected to the motor 2, and the third ring gear 154 is fixed. The structure is simple and compact, and the power can be transmitted from the motor 2 to the input shaft 10 in a speed reduction way when the motor 2 drives the wheels 18, and the power can be transmitted from the input shaft 10 to the motor 2 in a speed increase way when the motor 2 generates electricity.
The following describes preferred embodiments relating to control of the brakes (broadly, the first brake 8, the second brake 9) and the clutches (broadly, the first clutch 5, the second clutch 6, the third clutch 7):
when the first clutch 5 is arranged, the hybrid coupling system has multiple working modes such as a pure electric mode (with four gears: a first pure electric mode, a second pure electric mode, a third pure electric mode and a fourth pure electric mode), a hybrid driving mode (with four gears: a first hybrid driving mode, a second hybrid driving mode, a third hybrid driving mode and a fourth hybrid driving mode), an engine direct driving mode (with four gears: a first engine direct driving mode, a second engine direct driving mode, a third engine direct driving mode and a fourth engine direct driving mode);
the operation modes are shown in table 1.
TABLE 1
The following modes, in conjunction with fig. 2 to 17, describe the power transmission route of the hybrid coupling system, where in fig. 3, 5, 7, 9, 11, 13, 15 and 17, S1Showing the first sun gear 31, S2Showing the second sun gear 41, C1Showing the first carrier 33, C2Denotes the second carrier 43, R1Denotes a first ring gear 34, R2Showing a second ring gear 44, E1Representing the electric machine 2, ICE representing the engine 1, OUT representing the output;
(1) first pure electric mode
The first clutch 5 is separated, the second clutch 6 is combined, the third clutch 7 is separated, the first brake 8 is combined, the second brake 9 is separated, the engine 1 does not work, and the motor 2 drives to establish a first pure electric mode;
specifically, as shown in fig. 2, the power transmission route in this drive mode is: motor 2- > input shaft 10- > second clutch 6- > first sun gear 31- > first planet carrier 33- > first gear 12, intermediate shaft 11- > second gear 13- > third gear 14- > differential 17- > wheel 18.
As shown in fig. 3, in the first electric-only mode, the motor 2 outputs power to the first sun gear 31, the second carrier 43 and the first ring gear 34 do not rotate under the action of the first brake 8, the first carrier 33 and the second ring gear 44 rotate at the same speed, the second sun gear 41 rotates in the opposite direction to the first sun gear 31, the first carrier 33 rotates at a speed lower than that of the first sun gear 31, and the first carrier 33 outputs power to the wheels 18, so that the power is transmitted at a reduced speed when the motor 2 drives the wheels 18 through the CR-CR compound planetary gear train.
When the electric quantity of the power battery is sufficient and the vehicle speed is required to be low, the hybrid power coupling system can enter a first pure electric mode.
(2) Second pure electric mode
The first clutch 5 is separated, the second clutch 6 is combined, the third clutch 7 is separated, the first brake 8 is separated, the second brake 9 is combined, the engine 1 does not work, and the motor 2 drives to establish a second pure electric mode;
specifically, as shown in fig. 4, the power transmission route in this drive mode is: motor 2- > input shaft 10- > second clutch 6- > first sun gear 31- > first planet carrier 33- > first gear 12, intermediate shaft 11- > second gear 13- > third gear 14- > differential 17- > wheel 18.
As shown in fig. 5, in the second electric-only mode, the electric machine 2 outputs power to the first sun gear 31, the second sun gear 41 does not rotate under the action of the second brake 9, the first carrier 33 and the second ring gear 44 rotate at the same speed, the second carrier 43 and the first ring gear 34 rotate at the same speed, the first carrier 33 rotates at a speed higher than that of the second carrier 43, and the first carrier 33 outputs power to the wheels 18, so that the power is transmitted at a reduced speed when the wheels 18 are driven by the electric machine 2 through the CR-CR compound planetary row.
When the electric quantity of the power battery is sufficient and the vehicle speed is required to be at a medium-low speed, the hybrid power coupling system can enter a second pure electric mode.
(3) Third pure electric mode
The first clutch 5 is separated, the second clutch 6 is combined, the third clutch 7 is combined, the first brake 8 is separated, the second brake 9 is separated, the engine 1 does not work, and the motor 2 drives to establish a third pure electric mode;
specifically, as shown in fig. 6, the power transmission route in this drive mode is: motor 2- > input shaft 10- > second clutch 6, third clutch 7- > first planet carrier 33- > first gear 12, intermediate shaft 11- > second gear 13- > third gear 14- > differential 17- > wheel 18.
As shown in fig. 7, in the third electric-only mode, the CR-CR compound planetary line rotates as a whole, the motor 2 outputs power to the CR-CR compound planetary line through the second clutch 6 and the third clutch 7, the rotation speeds of the first sun gear 31, the second carrier 43, the first ring gear 34, the first carrier 33, the second carrier 44, and the second sun gear 41 are equal, and the first carrier 33 outputs power to the wheel 18, so that power transmission when the motor 2 drives the wheel 18 is achieved through the CR-CR compound planetary line and the speed ratio is 1.
When the electric quantity of the power battery is sufficient and the vehicle speed is required to be at a medium-high speed, the hybrid power coupling system can enter a third pure electric mode.
(4) Fourth pure electric mode
The first clutch 5 is separated, the second clutch 6 is separated, the third clutch 7 is combined, the first brake 8 is separated, the second brake 9 is combined, the engine 1 does not work, and the motor 2 drives to establish a fourth pure electric mode;
specifically, as shown in fig. 8, the power transmission route in this drive mode is: motor 2- > input shaft 10- > third clutch 7- > second planet carrier 43- > first planet carrier 33- > first gear 12, intermediate shaft 11- > second gear 13- > third gear 14- > differential 17- > wheel 18.
As shown in fig. 9, in the fourth electric-only mode, the motor 2 outputs power to the second carrier 43, the second sun gear 41 does not rotate under the action of the second brake 9, the rotation speeds of the second carrier 43 and the first ring gear 34 are equal, the rotation speeds of the first carrier 33 and the second ring gear 44 are equal, the rotation speed of the first carrier 33 is greater than that of the second carrier 43, the rotation speed of the first sun gear 31 is greater than that of the first carrier 33, and the first carrier 33 outputs power to the wheel 18, so that the power is transmitted at an increased speed when the motor 2 drives the wheel 18 through the CR-CR compound planetary row.
When the electric quantity of the power battery is sufficient and the vehicle speed is required to be high, the hybrid power coupling system can enter a fourth pure electric mode.
In conclusion, four gears of a pure electric mode can be realized through switching of working states of the clutch and the brake, and therefore better power matching is realized.
(5) First hybrid drive mode
The first clutch 5 is combined, the second clutch 6 is combined, the third clutch 7 is separated, the first brake 8 is combined, the second brake 9 is separated, the engine 1 is driven, and the motor 2 is driven in an auxiliary mode to establish a first hybrid driving mode;
specifically, as shown in fig. 10, the power transmission route 1 in this drive mode is: the input shaft 10 of the motor 2- > the second clutch 6- > the first sun gear 31- > the first planet carrier 33- > the first gear 12, the intermediate shaft 11- > the second gear 13- > the third gear 14- > the differential 17- > the wheel 18,
the power transmission route 2 is: the engine 1- > the first clutch 5- > the input shaft 10- > the second clutch 6- > the first sun gear 31- > the first planet carrier 33- > the first gear 12, the intermediate shaft 11- > the second gear 13- > the third gear 14- > the differential 17- > the wheel 18.
As shown in fig. 11, in the second hybrid driving mode, the motor 2 and the engine 1 output power to the first sun gear 31 at the same time, and then output power to the wheels 18 through the first carrier 33, so that power transmission at the time when the wheels 18 are driven by the motor 2 and the engine 1 is reduced through the CR-CR compound planetary line (the power transmission process of the CR-CR compound planetary line is the same as that of the first electric-only mode, and is not described here again).
The hybrid coupling system may enter a first hybrid drive mode when the vehicle speed request is low.
(6) Second hybrid drive mode
Combining the first clutch 5, the second clutch 6, the third clutch 7, the first brake 8, the second brake 9, the engine 1 and the motor 2 for auxiliary driving to establish a second hybrid driving mode;
specifically, as shown in fig. 12, the power transmission route 1 in this drive mode is: the input shaft 10 of the motor 2- > the second clutch 6- > the first sun gear 31- > the first planet carrier 33- > the first gear 12, the intermediate shaft 11- > the second gear 13- > the third gear 14- > the differential 17- > the wheel 18,
the power transmission route 2 is: the engine 1- > the first clutch 5- > the input shaft 10- > the second clutch 6- > the first sun gear 31- > the first planet carrier 33- > the first gear 12, the intermediate shaft 11- > the second gear 13- > the third gear 14- > the differential 17- > the wheel 18.
As shown in fig. 13, in the second hybrid driving mode, the motor 2 and the engine 1 output power to the first sun gear 31 at the same time, and then output power to the wheels 18 through the first planet carrier 33, so that power transmission at the time when the wheels 18 are driven by the motor 2 and the engine 1 is reduced through the CR-CR compound planet row (the power transmission process of the CR-CR compound planet row is the same as that in the second electric-only mode, and is not described here again).
When the vehicle speed is required to be at the medium and low speed, the hybrid coupling system can enter a second hybrid driving mode.
(7) Third hybrid drive mode
Combining the first clutch 5, the second clutch 6 and the third clutch 7, separating the first brake 8 and the second brake 9, driving the engine 1 and auxiliary driving the motor 2 to establish a third hybrid driving mode;
specifically, as shown in fig. 14, the power transmission route 1 in this drive mode is: motor 2- > input shaft 10- > second clutch 6, third clutch 7- > first planet carrier 33- > first gear 12, intermediate shaft 11- > second gear 13- > third gear 14- > differential 17- > wheel 18,
the power transmission route 2 is: the engine 1- > the first clutch 5- > the input shaft 10- > the second clutch 6, the third clutch 7- > the first planet carrier 33- > the first gear 12, the intermediate shaft 11- > the second gear 13- > the third gear 14- > the differential 17- > the wheel 18.
As shown in fig. 15, in the third hybrid driving mode, the CR-CR compound planetary line rotates as a whole, the motor 2 and the engine 1 output power to the CR-CR compound planetary line through the second clutch 6 and the third clutch 7, and the first carrier 33 outputs power to the wheels 18, so that power transmission is achieved at a speed ratio of 1 when the wheels 18 are driven by the motor 2 and the engine 1 through the CR-CR compound planetary line (the power transmission process of the CR-CR compound planetary line is the same as that of the third electric-only mode, and will not be described again here).
When the vehicle speed requirement is medium-high speed, the hybrid coupling system can enter a third hybrid driving mode.
(8) Fourth hybrid drive mode
The first clutch 5 is combined, the second clutch 6 is separated, the third clutch 7 is combined, the first brake 8 is separated, the second brake 9 is combined, the engine 1 is driven, and the motor 2 is driven in an auxiliary mode, so that a fourth hybrid driving mode is established;
specifically, as shown in fig. 16, the power transmission route 1 in this drive mode is: motor 2- > input shaft 10- > third clutch 7- > second planet carrier 43- > first planet carrier 33- > first gear 12, intermediate shaft 11- > second gear 13- > third gear 14- > differential 17- > wheel 18,
the power transmission route 2 is: the engine 1- > the first clutch 5- > the input shaft 10- > the third clutch 7- > the second planet carrier 43- > the first planet carrier 33- > the first gear 12, the intermediate shaft 11- > the second gear 13- > the third gear 14- > the differential 17- > the wheel 18.
As shown in fig. 17, in the fourth hybrid driving mode, the motor 2 and the engine 1 output power to the second planet carrier 43, and the first planet carrier 33 outputs power to the wheels 18, so that the power increasing transmission when the wheels 18 are driven by the motor 2 and the engine 1 is realized through the CR-CR compound planetary row (the power transmission process of the CR-CR compound planetary row is the same as that of the fourth electric-only mode, and is not described again here).
When the vehicle speed is required to be high, the hybrid coupling system can enter a fourth hybrid driving mode.
In summary, four gears of the hybrid driving mode can be realized by switching the working states of the clutch and the brake, so that better power matching is realized.
(9) First engine direct drive mode
Combining the first clutch 5, the second clutch 6, the third clutch 7, the first brake 8 and the second brake 9, driving the engine 1, and generating power when the motor 2 does not work or is driven by the engine 1 to establish a first engine direct drive mode;
specifically, the power transmission route 1 in this drive mode is: the engine 1- > the first clutch 5- > the input shaft 10- > the second clutch 6- > the first sun gear 31- > the first planet carrier 33- > the first gear 12, the intermediate shaft 11- > the second gear 13- > the third gear 14- > the differential 17- > the wheel 18,
the power transmission route 2 is: the engine 1 > the first clutch 5 > the input shaft 10 > the motor 2;
in this driving mode, the power transmission path and the deceleration process of the driving wheels 18 of the engine 1 are shown in fig. 10 to 11.
When the vehicle speed is required to be low, the hybrid power coupling system can enter a first engine direct-drive mode; when the power battery is short of electricity, the engine 1 can be used for driving the motor 2 to generate electricity for the power battery.
(10) Second Engine direct drive mode
Combining the first clutch 5, the second clutch 6, the third clutch 7, the first brake 8 and the second brake 9, driving the engine 1, and generating power when the motor 2 does not work or is driven by the engine 1 to establish a second engine direct drive mode;
specifically, the power transmission route 1 in this drive mode is: the engine 1- > the first clutch 5- > the input shaft 10- > the second clutch 6- > the first sun gear 31- > the first planet carrier 33- > the first gear 12, the intermediate shaft 11- > the second gear 13- > the third gear 14- > the differential 17- > the wheel 18,
the power transmission route 2 is: the engine 1 > the first clutch 5 > the input shaft 10 > the motor 2;
in this driving mode, the power transmission path and the deceleration process of the driving wheels 18 of the engine 1 are shown in fig. 12 to 13.
When the vehicle speed is required to be at a medium-low speed, the hybrid power coupling system can enter a second engine direct-drive mode; when the power battery is short of electricity, the engine 1 can be used for driving the motor 2 to generate electricity for the power battery.
(11) Third Engine direct drive mode
The first clutch 5 is combined, the second clutch 6 is combined, the third clutch 7 is combined, the first brake 8 is separated, the second brake 9 is separated, the engine 1 is driven, the motor 2 does not work or generates power under the driving of the engine 1, so that a third engine direct drive mode is established;
specifically, the power transmission route 1 in this drive mode is: the engine 1- > the first clutch 5- > the input shaft 10- > the second clutch 6, the third clutch 7- > the first planet carrier 33- > the first gear 12, the intermediate shaft 11- > the second gear 13- > the third gear 14- > the differential 17- > the wheel 18,
the power transmission route 2 is: the engine 1 > the first clutch 5 > the input shaft 10 > the motor 2;
in the driving mode, please refer to fig. 14-15 for the power transmission path and the deceleration process of the driving wheels 18 of the engine 1.
When the vehicle speed is required to be at medium-high speed, the hybrid power coupling system can enter a third engine direct-drive mode; when the power battery is short of electricity, the engine 1 can be used for driving the motor 2 to generate electricity for the power battery.
(12) Fourth Engine direct drive mode
Combining the first clutch 5, separating the second clutch 6, combining the third clutch 7, separating the first brake 8, combining the second brake 9, driving the engine 1, and generating power by the motor 2 without work or under the driving of the engine 1 to establish a fourth engine direct drive mode;
specifically, the power transmission route 1 in this drive mode is: the engine 1- > the first clutch 5- > the input shaft 10- > the third clutch 7- > the second planet carrier 43- > the first planet carrier 33- > the first gear 12, the intermediate shaft 11- > the second gear 13- > the third gear 14- > the differential 17- > the wheel 18,
the power transmission route 2 is: the engine 1 > the first clutch 5 > the input shaft 10 > the motor 2; in the driving mode, the power transmission route and the deceleration process of the driving wheels 18 of the engine 1 are shown in fig. 16-17.
When the vehicle speed is required to be high, the hybrid power coupling system can enter a fourth engine direct drive mode; when the power battery is short of electricity, the engine 1 can be used for driving the motor 2 to generate electricity for the power battery.
(13) Parking power generation mode
The first clutch 5 is separated, the second clutch 6 is combined, the third clutch 7 is separated, the first brake 8 is combined, the second brake 9 is separated, the engine 1 does not work, the motor 2 generates braking torque and induced current generated in a winding of the motor 2 charges the power of a power battery so as to establish a parking power generation mode;
when the vehicle is braked, the hybrid power coupling system can enter a parking power generation mode, the motor 2 generates braking torque to brake the wheels 18, and meanwhile induced current generated in the winding of the motor 2 charges the power battery, so that the recovery of braking energy is realized.
When the first clutch 5 is cancelled, the control of the first clutch 5 is cancelled accordingly, while the power transmission route of each operation mode does not pass through the first clutch 5 accordingly.
If the third planetary row 15 is arranged, power is transmitted between the input shaft 10 and the motor 2 through the third planetary row 15; when the motor 2 participates in driving: motor 2- > third sun gear 151- > third planet carrier 153- > input shaft 10; when the motor 2 participates in power generation, the input shaft 10- > the third planet carrier 153- > the third sun gear 151- > the motor 2.
The embodiment of the invention also provides a vehicle, which comprises a controller and a power battery connected with the controller, and also comprises the hybrid power coupling system mentioned in any one of the previous embodiments, wherein the engine 1 and the motor 2 are connected with the controller and controlled by the controller.
By adopting the hybrid power coupling system, the motor 2 can generate power for the power battery under the driving of the engine 1, the power battery can provide power for driving the wheels 18 for the motor 2, the engine 1 can directly drive the wheels 18, the working states of the first clutch 5 (if arranged), the second clutch 6, the third clutch 7, the first brake 8 and the second brake 9 are switched, and the gears of the wheels 18 driven by the engine 1 and the motor 2 can be controlled, so that multiple gears of multiple driving modes are realized, and higher transmission efficiency is obtained; the engine is in a direct drive mode, so that the energy conversion of machine-electricity and electricity-machine is avoided, and the transmission efficiency is improved; the engine 1 and the motor 2 share the speed reduction assembly, the structure is simple and compact, the number of parts is reduced, and the reduction of load is facilitated, so that the power performance of the whole vehicle can be further improved, and the production cost of the whole vehicle is reduced; in the hybrid driving mode and the pure electric mode, the motor 2 participates in driving, so that power interruption is avoided; the power battery effectively supplements the driving power required by the wheels 18, so that the power of the internal combustion engine is more reasonably allocated, the working state of the internal combustion engine is kept free from or less influenced by road conditions, and the hybrid electric vehicle is suitable for new energy vehicles (such as PHEV and HEV). The internal combustion engine can always work in a set optimal state so as to improve the fuel efficiency of the whole vehicle.
In one embodiment, the control process for automatically switching the multiple driving modes (the pure electric mode, the hybrid driving mode and the engine direct driving mode) of the hybrid power coupling system according to the battery SOC value and the vehicle speed requirement includes the following steps:
s1, the controller judges the relation between the battery SOC value and the first threshold value, or simultaneously judges the relation between the battery SOC value and the first threshold value and the relation between the vehicle speed and the second threshold value;
s2, switching the working mode of the hybrid power coupling system by the controller according to the judgment result of the step S1;
s3, when braking, the controller controls the motor 2 to generate braking torque and induce current in its windings to charge the power battery.
The first threshold is used for judging the SOC value of the battery, the second threshold is used for judging the vehicle speed, the present embodiment does not limit the value ranges of the first threshold and the second threshold, and can be freely set according to a specific control strategy, and the values of the first threshold and the second threshold are different under different control strategies. After the first threshold and the second threshold are set in the controller, the controller automatically performs the determination of step S1 and automatically switches between the plurality of driving modes according to the determination result of step S1.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A hybrid power coupling system comprises an engine, a motor, a first planet row and a second planet row, wherein the first planet row comprises a first sun gear, a first planet carrier and a first gear ring, the second planet row comprises a second sun gear, a second planet carrier and a second gear ring, the first planet carrier is connected with the second gear ring, and the first gear ring is connected with the second planet carrier;
the engine and the motor are both connected to the input shaft;
the input shaft is connected with the first sun gear through the second clutch, and the input shaft is connected with the second planet carrier through the third clutch;
the first brake is used for braking the second planet carrier, and the second brake is used for braking the second sun gear;
the first carrier outputs power to the wheels.
2. The hybrid coupling system according to claim 1, further comprising a first clutch through which a rotating shaft of the engine is connected to the input shaft.
3. The hybrid coupling system of claim 2, wherein the hybrid coupling system has a first electric-only mode, a second electric-only mode, a third electric-only mode, a fourth electric-only mode, a first hybrid drive mode, a second hybrid drive mode, a third hybrid drive mode, a fourth hybrid drive mode, a first engine direct drive mode, a second engine direct drive mode, a third engine direct drive mode, and a fourth engine direct drive mode;
disengaging the first clutch, engaging the second clutch, disengaging the third clutch, engaging the first brake, disengaging the second brake, the engine is not operating, the electric machine is driven to establish the first electric-only mode;
disengaging the first clutch, engaging the second clutch, disengaging the third clutch, disengaging the first brake, engaging the second brake, the engine not operating, the electric machine driving to establish the second electric-only mode;
disengaging the first clutch, engaging the second clutch, engaging the third clutch, disengaging the first brake, disengaging the second brake, the engine is not operating, the electric machine is driven to establish the third electric-only mode;
disengaging the first clutch, disengaging the second clutch, engaging the third clutch, disengaging the first brake, engaging the second brake, the engine not operating, the electric machine driving to establish the fourth electric-only mode;
engaging the first clutch, engaging the second clutch, disengaging the third clutch, engaging the first brake, disengaging the second brake, the engine drive, the electric machine accessory drive to establish the first hybrid drive mode;
engaging the first clutch, engaging the second clutch, disengaging the third clutch, disengaging the first brake, engaging the second brake, the engine drive, the electric machine accessory drive to establish the second hybrid drive mode;
engaging the first clutch, engaging the second clutch, engaging the third clutch, disengaging the first brake, disengaging the second brake, the engine drive, the electric machine accessory drive to establish the third hybrid drive mode;
engaging the first clutch, disengaging the second clutch, engaging the third clutch, disengaging the first brake, engaging the second brake, the engine drive, the electric machine accessory drive to establish the fourth hybrid drive mode;
the first clutch is combined, the second clutch is combined, the third clutch is separated, the first brake is combined, the second brake is separated, the engine is driven, the motor does not work or generates power under the driving of the engine, so that the first engine direct drive mode is established;
the first clutch is combined, the second clutch is combined, the third clutch is separated, the first brake is separated, the second brake is combined, the engine is driven, the motor does not work or generates power under the driving of the engine, so that the direct drive mode of the second engine is established;
the first clutch is combined, the second clutch is combined, the third clutch is combined, the first brake is separated, the second brake is separated, the engine is driven, the motor does not work or generates power under the driving of the engine, so that the direct drive mode of the third engine is established;
the first clutch is combined, the second clutch is separated, the third clutch is combined, the first brake is separated, the second brake is combined, the engine is driven, and the motor does not work or generates power under the driving of the engine to establish the fourth engine direct drive mode.
4. The hybrid coupling system of claim 1, wherein the first sun gear and the second sun gear are rotatably disposed on the input shaft;
the second clutch with the third clutch is integrated into the double clutch of sharing clutch housing, the double clutch is located first sun gear with between the second sun gear, clutch housing locates on the input shaft.
5. The hybrid coupling system of claim 1, further comprising an intermediate shaft and a first gear disposed on the intermediate shaft, the first carrier being in meshing engagement with the first gear;
the intermediate shaft or the first gear outputs power to wheels.
6. The hybrid coupling system according to claim 5, further comprising a second gear fixed to the countershaft and a third gear for connection to a differential, the first gear fixed to the countershaft and the third gear meshing with the second gear, the first gear having a gear ratio to the first carrier of less than 1 and the third gear having a gear ratio to the second gear of less than 1; or
The hybrid coupling system further comprises a third gear connected to the differential, the third gear is meshed with the first gear, the transmission ratio of the first gear to the first planet carrier is smaller than 1, and the transmission ratio of the third gear to the first gear is smaller than 1.
7. The hybrid coupling system of claim 1, wherein the input shaft is speed-increased by a speed-increasing mechanism in connection with the electric machine.
8. The hybrid coupling system of claim 7, wherein the speed increasing mechanism is a third planetary row including a third sun gear, a third planet carrier, and a third ring gear;
the engine and the motor are coaxially arranged, one end of the input shaft is connected to the engine, the other end of the input shaft is connected to the third planet carrier, the third sun gear is connected to the motor, and the third gear ring is fixed.
9. The hybrid coupling system of claim 1, wherein the hybrid coupling system has a first electric-only mode, a second electric-only mode, a third electric-only mode, a fourth electric-only mode, a first hybrid drive mode, a second hybrid drive mode, a third hybrid drive mode, a fourth hybrid drive mode, a first engine direct drive mode, a second engine direct drive mode, a third engine direct drive mode, and a fourth engine direct drive mode;
engaging the second clutch, disengaging the third clutch, engaging the first brake, disengaging the second brake, the engine is not operating, and the electric machine is driven to establish the first electric-only mode;
engaging the second clutch, disengaging the third clutch, disengaging the first brake, engaging the second brake, the engine not operating, the electric machine driving to establish the second electric-only mode;
engaging the second clutch, engaging the third clutch, disengaging the first brake, disengaging the second brake, the engine is not operating, and the electric machine is driven to establish the third electric-only mode;
disengaging the second clutch, engaging the third clutch, disengaging the first brake, engaging the second brake, the engine not operating, the electric machine driving to establish the fourth electric-only mode;
engaging the second clutch, disengaging the third clutch, engaging the first brake, disengaging the second brake, the engine drive, the electric machine accessory drive to establish the first hybrid drive mode;
engaging the second clutch, disengaging the third clutch, disengaging the first brake, engaging the second brake, the engine driving, the electric machine accessory driving to establish the second hybrid drive mode;
engaging the second clutch, engaging the third clutch, disengaging the first brake, disengaging the second brake, the engine drive, the electric machine accessory drive to establish the third hybrid drive mode;
disengaging the second clutch, engaging the third clutch, disengaging the first brake, engaging the second brake, the engine driving, the electric machine accessory driving to establish the fourth hybrid drive mode;
the second clutch is combined, the third clutch is separated, the first brake is combined, the second brake is separated, the engine is driven, the motor does not work or generates power under the driving of the engine, so that the first engine direct drive mode is established;
the second clutch is combined, the third clutch is separated, the first brake is separated, the second brake is combined, the engine is driven, the motor does not work or generates power under the driving of the engine, so that the direct drive mode of the second engine is established;
the second clutch is combined, the third clutch is combined, the first brake is separated, the second brake is separated, the engine is driven, the motor does not work or generates power under the driving of the engine, so that the third engine direct drive mode is established;
and separating the second clutch, combining the third clutch, separating the first brake, combining the second brake, driving the engine, and generating power by the motor without work or under the driving of the engine to establish the fourth engine direct drive mode.
10. A vehicle comprising a controller and a battery coupled to the controller, further comprising the hybrid coupling system of any one of claims 1-9, the engine and the electric machine being coupled to and controlled by the controller.
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| CN201811619692.2A CN111376700B (en) | 2018-12-28 | 2018-12-28 | Hybrid power coupling system and vehicle |
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| CN115534657A (en) * | 2021-06-30 | 2022-12-30 | 比亚迪股份有限公司 | Hybrid power system and vehicle with same |
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