CN115059757B - Control method, computing device and medium for coaxial downshift - Google Patents
Control method, computing device and medium for coaxial downshift Download PDFInfo
- Publication number
- CN115059757B CN115059757B CN202210660657.5A CN202210660657A CN115059757B CN 115059757 B CN115059757 B CN 115059757B CN 202210660657 A CN202210660657 A CN 202210660657A CN 115059757 B CN115059757 B CN 115059757B
- Authority
- CN
- China
- Prior art keywords
- gear
- target
- rotating speed
- clutch
- power transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 56
- 230000005540 biological transmission Effects 0.000 claims abstract description 103
- 230000007704 transition Effects 0.000 claims description 58
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 20
- 230000001276 controlling effect Effects 0.000 description 33
- 230000001052 transient effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 4
- 238000005429 filling process Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000000977 initiatory effect Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
- F16H61/0437—Smoothing ratio shift by using electrical signals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/50—Signals to an engine or motor
- F16H63/502—Signals to an engine or motor for smoothing gear shifts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The embodiment of the invention discloses a control method, computer equipment and medium for coaxial downshift, wherein the control method for coaxial downshift is applied to an automobile with double clutches and comprises the following steps: acquiring a current gear and a target gear; when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under a first clutch; controlling the rotating speed of the engine to continuously rise to a target rotating speed, and simultaneously controlling the current gear to be shifted down to the target gear; the target rotating speed is the rotating speed of the engine in the target gear. According to the embodiment, under the condition that the coaxial downshift is met, the lifting of the rotating speed of the engine and the adjustment of the gear are controlled simultaneously, the rotating speed of the engine is directly lifted to the rotating speed of the target gear, the continuous output of power in the downshift process is ensured, the time required by the downshift is shortened, the downshift efficiency is improved, and the use experience of a user is improved.
Description
Technical Field
The invention relates to the technical field of transmissions, in particular to a control method, computing equipment and medium for coaxial downshift.
Background
The existing double clutch automatic transmission comprises two sets of gear transmission systems, wherein an odd clutch controls power transmission of odd gears, such as 1 gear, 3 gear, 5 gear and 7 gear; the even clutch controls the power transmission of even gears, such as 2, 4, 6, and R. After the proper gear is selected by a control program in the transmission control unit and gear engagement is completed, the combination and separation of the odd clutch and the even clutch are respectively controlled to realize gear switching.
For a dual clutch automatic transmission, when the target gear and the current gear are in the same gear system, the prior art approaches are mainly: the clutch is first disengaged, the target gear is disengaged, and then the clutch is engaged again, and the control method can cause power interruption in the gear shifting process.
Disclosure of Invention
The embodiment of the invention provides a control method, computing equipment and medium for coaxial downshift, which are used for ensuring continuous output of power in the downshift process, shortening the time required by the downshift, improving the downshift efficiency and improving the use feeling of a user.
In a first aspect, an embodiment of the present invention provides a control method for a coaxial downshift, applied to a dual clutch automobile, including:
Acquiring a current gear and a target gear;
When the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under a first clutch;
Controlling the rotating speed of the engine to continuously rise to a target rotating speed, and simultaneously controlling the current gear to be downshifted to the target gear; the target rotating speed is the rotating speed of the engine in the target gear.
In a second aspect, embodiments of the present invention provide a computing device, the computing device comprising:
One or more processors;
storage means for storing one or more programs,
When the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the control method of coaxial downshift as described in any one of the first aspects.
In a third aspect, an embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the control method of coaxial downshift according to any one of the first aspects.
The embodiment of the invention provides a control method for coaxial downshifting, which comprises the steps of firstly obtaining a current gear and a target gear; secondly, when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under a first clutch; finally, controlling the rotating speed of the engine to continuously rise to a target rotating speed, and simultaneously controlling the current gear to be downshifted to the target gear; the target rotating speed is the rotating speed of the engine in the target gear. Under the condition of meeting the coaxial downshift, the embodiment of the invention simultaneously controls the lifting of the rotating speed of the engine and the adjustment of the gear, and the rotating speed of the engine is directly lifted to the rotating speed of the target gear, thereby ensuring the continuous output of power in the downshift process, shortening the time required by the downshift, improving the downshift efficiency and improving the use feeling of users.
Drawings
In order to more clearly illustrate the technical solution of the exemplary embodiments of the present invention, a brief description is given below of the drawings required for describing the embodiments. It is obvious that the drawings presented are only drawings of some of the embodiments of the invention to be described, and not all the drawings, and that other drawings can be made according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a control method for a coaxial downshift according to a first embodiment of the present invention;
Fig. 2 is a flow chart of a control method for a coaxial downshift according to a second embodiment of the present invention;
FIG. 3 is a graph showing the variation of engine speed according to a second embodiment of the present invention;
Fig. 4 is a flowchart of a control method for a coaxial downshift according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a control device for coaxial downshift according to a fourth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a computer device according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be fully described below by way of specific embodiments with reference to the accompanying drawings in the examples of the present invention. It is apparent that the described embodiments are some, but not all, embodiments of the present invention, and that all other embodiments, which a person of ordinary skill in the art would obtain without making inventive efforts, are within the scope of this invention.
Example 1
Fig. 1 is a schematic flow chart of a control method for coaxial downshift according to an embodiment of the present invention, and referring to fig. 1, the embodiment of the present invention may be suitable for performing downshift adjustment on an automobile with a dual clutch, and the method may be performed by a control device for coaxial downshift according to an embodiment of the present invention, where the device may be implemented by software and/or hardware, and the method specifically includes the following steps:
S110, acquiring a current gear and a target gear.
Different gear ratios can be obtained by matching a series of large and small gears, and the engine can work in the optimal power performance state by adjusting the gear of the automobile. Exemplary gears include 1,2, 3, and 4, and embodiments of the present invention are not specifically limited thereto. Further, the current gear is the current gear state of the automobile, the target gear is the gear state to be achieved by the automobile, the current gear is 4 th gear, and the target gear is 2 nd gear.
And S120, when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode.
The double clutch of the automobile is an odd clutch of which one part is used for transmitting odd gears and the other part is used for transmitting even gears, and the power transmission system of the double clutch is transmitted through two different clutches, namely the power transmission system of the odd gears is different from the power transmission system of the even gears.
Optionally, the first clutch is an odd clutch, and the second clutch is an even clutch; or the first clutch is an even clutch and the second clutch is an odd clutch.
Specifically, if the odd clutch may be the first clutch, the even clutch is the second clutch based on the first clutch. If the odd clutch is the second clutch and the even clutch is the first clutch on the basis of the second clutch, the naming of the odd clutch and the even clutch is not particularly limited, and the odd clutch and the even clutch are distinguished only by different naming.
Specifically, the power transmission system may include a first power transmission system that is a power transmission system under a first clutch and a second power transmission system that is a power transmission system under a second clutch, i.e., the power transmission systems are different under different clutches. When the current gear is located in the first power transmission system and the target gear is also located in the first power transmission system, it means that the current gear and the target gear are different gears controlled by the same clutch, and when the first clutch is an even clutch, for example, the current gear is 4 th gear and located in the first power transmission system, and the target gear is 2 nd gear and also located in the first power transmission system, so that the power coaxial downshift mode can be started.
And S130, controlling the rotation speed of the engine to continuously rise to the target rotation speed.
Specifically, the rotation speed of the engine is a physical parameter, and the rotation speed of the engine is related to the number of times of doing work in unit time or the effective power of the engine, that is, the effective power of the engine changes with different rotation speeds.
Further, kinetic energy provided by the engine is transmitted to different gears corresponding to different gears through the clutch, namely, the engine has different rotating speeds matched with the different gears. The target rotational speed is the rotational speed of the engine in the target gear, and the target rotational speed is the rotational speed of the engine in the 2 nd gear if the target gear is the 2 nd gear.
And S140, controlling the current gear to be shifted down to the target gear.
Specifically, the gear is controlled to perform synchronous adjustment while the rotation speed of the transmitter is continuously increased from the current rotation speed to the target rotation speed, i.e., the current gear is downshifted to the target gear. For example, when the current gear is 4 th gear and the target gear is 2 nd gear, the gear will be 2 nd gear from 4 th gear while the rotational speed of the engine continues to rise to the 2 nd gear lower rotational speed.
The embodiment of the invention provides a control method for coaxial downshifting, which comprises the steps of firstly obtaining a current gear and a target gear; secondly, when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under a first clutch; finally, controlling the rotating speed of the engine to continuously rise to a target rotating speed, and simultaneously controlling the current gear to be downshifted to the target gear; the target rotating speed is the rotating speed of the engine in the target gear. Under the condition of meeting the coaxial downshift, the embodiment of the invention simultaneously controls the lifting of the rotating speed of the engine and the adjustment of the gear, and the rotating speed of the engine is directly lifted to the rotating speed of the target gear, thereby ensuring the continuous output of power in the downshift process, shortening the time required by the downshift, improving the downshift efficiency and improving the use feeling of users.
Example two
Fig. 2 is a schematic flow chart of a control method for coaxial downshift according to the second embodiment of the present invention, fig. 3 is a history curve of engine speed change according to the second embodiment of the present invention, and referring to fig. 2 and 3, the second embodiment refines how to start a power coaxial downshift mode based on the above embodiment. In this embodiment, the method specifically includes the following steps:
s210, acquiring a current gear and a target gear.
And S220, when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode.
S230, obtaining a target rotating speed according to a target rotating speed calculation formula.
The target rotating speed calculation formula is as follows: target rotation speed=output shaft rotation speed+target gear speed ratio+friction speed difference. The engine transmits kinetic energy to the clutch through the input shaft, the clutch is connected with the gear through the output shaft, the kinetic energy provided by the engine is transmitted to the gear, the motion of the automobile is guaranteed, namely, the output shaft is a driving shaft connected with the clutch and the gear, and the rotating speed of the output shaft can be obtained through the set rotating speed sensor. Further, the gear speed ratio refers to a gear ratio of a gear connected to the clutch, which is equal to a ratio of a rotational angular velocity of the output shaft to a rotational angular velocity of the input shaft in a certain gear, that is, a target gear speed ratio is a ratio of the rotational angular velocity in a target gear. Further, the friction speed difference is obtained by calibration, that is, the control unit of the automobile adaptively adjusts in different gear positions, and the friction speed difference is typically between 10rpm and 50rpm, which is not particularly limited in the embodiment of the present invention.
S240, acquiring the real-time target rotating speed of the engine according to a real-time target rotating speed calculation formula.
Wherein, the real-time target rotating speed calculation formula is: real-time target speed = engine shift start speed + (target speed-engine shift start speed) × shift factor. The gear shifting starting rotating speed of the engine is the rotating speed of the engine during gear adjustment.
Further, referring to fig. 3, the shift coefficient is obtained by looking up a transition curve according to a ratio of shift timing to total shift time, and the transition curve is pre-stored data of a control unit of the automobile. Specifically, the gear shifting timing is that the gear shifting starting time is 0, and 1 is accumulated in each calculation period in the gear shifting process; the total gear shifting time is the expected gear shifting time, and is obtained by calibration and is generally 1-2 s; further, the transition curve is a history curve of engine speed change, and is obtained by calibration, and generally gradually and smoothly transits from 0 to 1.
S250, controlling the real-time target rotating speed of the engine to continuously rise to the target rotating speed.
Specifically, the real-time target rotating speed of the engine is the real-time rotating speed when the engine is subjected to rotating speed adjustment, and after the target rotating speed of the engine is obtained, the real-time rotating speed of the engine is continuously close to the target rotating speed, namely the real-time target rotating speed is continuously increased until the target rotating speed is reached.
And S260, controlling the current gear to be shifted down to the middle transition gear.
Specifically, the intermediate gear is located between the current gear and the target gear, for example, the intermediate transition gear is a target gear plus one gear, and the intermediate transition gear is a3 gear if the intermediate transition gear is a target gear and the current gear is a4 gear and the target gear is a2 gear. Further, the current gear and the target gear are both located in the first power transmission system, i.e., the current gear and the target gear are different gears controlled by the same clutch, but the intermediate transition gear is located in the second power transmission system, i.e., the power transmission system in which the current gear and the target gear are located is different. By arranging an intermediate transition gear between the target gear and the current gear, the transient transition of the engine power can be ensured, and further the time required for reduction can be ensured to be shortened.
And S270, controlling the intermediate transition gear to shift down to the target gear.
Specifically, the gear is controlled to perform synchronous adjustment while the rotation speed of the transmitter is continuously increased from the current rotation speed to the target rotation speed, i.e., the intermediate transition gear is shifted down to the target gear. For example, when the current gear is 4 th gear, the intermediate transition gear is 3 rd gear, and the target gear is 2 nd gear, the gear will be 2 nd gear from 3 rd gear while the rotation speed of the engine is continuously increased to the 2 nd gear lower rotation speed.
In conclusion, through calculating the target rotating speed and the real-time target rotating speed of the engine, the continuous lifting of the rotating speed of the engine is realized, meanwhile, the intermediate transition gear is set, the transient transition of the power of the engine is ensured, the power output is generally kept in the process of the downshift, the time required by the downshift is shortened, the efficiency of the downshift is improved, and the use feeling of a user is improved.
Example III
Fig. 4 is a schematic flow chart of a control method for coaxial downshift according to a third embodiment of the present invention, and referring to fig. 4, the third embodiment refines on the basis of the foregoing embodiment, and specifically refines how to initiate a power coaxial downshift mode. In this embodiment, the method specifically includes the following steps:
S310, acquiring a current gear and a target gear.
And S320, when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode.
S330, obtaining the target rotating speed according to the target rotating speed calculation formula.
S340, acquiring the real-time target rotating speed of the engine according to a real-time target rotating speed calculation formula.
And S350, controlling the real-time target rotating speed of the engine to continuously rise to the target rotating speed.
S360, controlling the real-time gear to be adjusted to the intermediate transition gear.
The real-time gear is a gear in different stages when the current gear is adjusted to the target gear. And controlling the current gear to be disengaged from the current gear, and controlling the gear to be engaged by the intermediate transition gear to realize the regulation of the gear. For example, the intermediate transition gear is 3, and when the current gear is 4, the 4 th gear is disengaged and a shift to 3 rd gear is made. By arranging an intermediate transition gear between the target gear and the current gear, the transient transition of the engine power can be ensured, and further the time required for reduction can be ensured to be shortened.
And S370, controlling the second clutch corresponding to the intermediate transition gear to be filled with oil.
The clutch is characterized in that the kinetic energy of the engine is transmitted to the gear through the combination of the clutch, pressure oil enters one side of the clutch cylinder through the oil duct, the piston is pushed to move to the other side to compress the friction plate, and the driving/driven sides of the clutch realize synchronous movement, namely the clutch oil filling process. The embodiment of the invention does not limit the material and the type of the oil filling. And controlling the oil charge of the second clutch under the intermediate transition gear, namely, realizing the operation of a second power transmission system under the second clutch, wherein the intermediate transition gear is 3-gear, and when the second clutch is an odd clutch, after the oil charge of the odd clutch is finished, the engine can be regulated to 3-gear through the clutch, namely, the conversion of the intermediate transition gear is finished.
S380, judging whether the second clutch is filled with oil.
Further, in order to ensure accurate and stable performance of the downshift process, the oil filling process of the second clutch is judged in the oil filling stage, and successful adjustment of the intermediate transition gear is ensured. Specifically, if the second clutch is not filled with oil, the step S370 is executed, and the second clutch is continuously filled with oil until the second clutch is filled with oil; if the second clutch is filled with oil, the gear is successfully adjusted to the intermediate transition gear, and S390 is executed to judge whether the real-time target rotating speed exceeds the intermediate transition rotating speed.
S390, judging whether the real-time target rotating speed exceeds the intermediate transition rotating speed.
Further, when the rotation speed of the transmitter is continuously increased from the current rotation speed to the target rotation speed, the gear is controlled to be synchronously adjusted, namely, continuous output of power in the process of downshifting is ensured, time required by downshifting is shortened, and the efficiency of downshifting is improved. In order to ensure that the lifting of the engine speed and the gear adjustment are mutually matched, a judging process is added in the process of lifting the engine speed, and whether the real-time target speed exceeds the intermediate transition speed is judged. The intermediate transition gear is a gear controlled under the second clutch, that is, the intermediate transition rotation speed is the rotation speed of the second clutch under the intermediate transition gear, and the embodiment of the invention does not specifically limit whether the second clutch is an odd clutch or an even clutch. Further, when the gear is successfully adjusted to the intermediate transition gear, judging whether the rotational speed of the engine is matched with the engine, namely if the real-time target rotational speed exceeds the intermediate transition rotational speed, executing S3100, and controlling the current power transmission system to be adjusted to a second power transmission system; if the real-time target rotation speed does not exceed the intermediate transition rotation speed, S3110 is executed to control the real-time target rotation speed to continue to increase the rotation speed until the real-time target rotation speed exceeds the intermediate transition rotation speed.
S3100, controlling the current power transmission system to be adjusted to a second power transmission system.
When the real-time target rotating speed exceeds the intermediate transition rotating speed, namely the gear is successfully adjusted to the intermediate transition gear, the rotating speed of the engine is increased to the matched real-time target rotating speed. The current power transmission system is further controlled to be adjusted, namely when the current gear is positioned in the first power transmission system and the gear is adjusted to the intermediate transition gear, the power transmission system is also adjusted from the first power transmission system to the second power transmission system, and the corresponding clutch of the second power transmission system and the first power transmission system is different.
And S3120, controlling the real-time gear to be adjusted to the target gear.
The real-time gear is a gear at different stages when the current gear is adjusted to the target gear, the real-time gear is a middle transition gear at the moment, the middle transition gear is controlled to be taken off and shifted, namely the middle transition gear is separated, and the target gear is controlled to be shifted, so that the regulation of shifting is realized. For example, the intermediate transition gear is 3, and when the target gear is 2, the gear is disengaged from 3 and shifted to 2. By arranging an intermediate transition gear between the target gear and the current gear, the transient transition of the engine power can be ensured, and further the time required for reduction can be ensured to be shortened.
S3130, filling oil into the first clutch corresponding to the control target gear.
The clutch is characterized in that the kinetic energy of the engine is transmitted to the gear through the combination of the clutch, pressure oil enters one side of the clutch cylinder through the oil duct, the piston is pushed to move to the other side to compress the friction plate, and the driving/driven sides of the clutch realize synchronous movement, namely the clutch oil filling process. The embodiment of the invention does not limit the material and the type of the oil filling. And controlling the oil charge of the first clutch under the target gear, namely, realizing the operation of the first power transmission system under the first clutch, wherein the target gear is 2 gears, and when the first clutch is an even clutch, after the oil charge of the even clutch is finished, the engine can be regulated to 2 gears through the clutch, namely, the conversion of the target gear is finished.
S3140, judging whether the first clutch is filled with oil or not.
Further, in order to ensure accurate and stable performance of the downshift process, the oil filling process of the first clutch is judged in the oil filling stage, and successful adjustment to the target gear is ensured. Specifically, if the first clutch is not filled with oil, S3130 is executed, and the filling of the first clutch is continued until the filling of the first clutch is completed; if the first clutch is filled with oil, the gear is successfully adjusted to the target gear, S3150 is executed, and whether the real-time target rotational speed exceeds the final rotational speed is determined.
S3150, judging whether the real-time target rotating speed exceeds the final rotating speed.
Further, when the rotation speed of the transmitter is continuously increased from the current rotation speed to the target rotation speed, the gear is controlled to be synchronously adjusted, namely, continuous output of power in the process of downshifting is ensured, time required by downshifting is shortened, and the efficiency of downshifting is improved. In order to ensure that the lifting of the engine speed and the gear adjustment are mutually matched, a judging process is added in the process of lifting the engine speed, and whether the real-time target speed exceeds the final speed is judged. The target gear is a gear controlled under the first clutch, namely the final rotating speed is the rotating speed of the first clutch under the target gear, and the embodiment of the invention does not specifically limit whether the first clutch is an odd clutch or an even clutch.
Further, when the gear is successfully adjusted to the target gear, judging whether the rotational speed of the engine is matched with the target gear, namely if the real-time target rotational speed exceeds the final rotational speed, executing S3160, controlling the current power transmission system to be adjusted to the first power transmission system, and completing the downshift of the current gear to the target gear; if the real-time target rotation speed does not exceed the final rotation speed, S3170 is executed, and the real-time target rotation speed is controlled to continuously increase the rotation speed until the real-time target rotation speed exceeds the final rotation speed.
S3160, controlling the current power transmission system to be adjusted to the first power transmission system, and completing the downshift of the current gear to the target gear.
When the real-time target rotating speed exceeds the final rotating speed, namely the gear is successfully adjusted to the target gear, the rotating speed of the engine is increased to the matched real-time target rotating speed, namely the target rotating speed. And further controlling the current power transmission system to adjust, namely, when the intermediate transition gear is positioned in the second power transmission system and the gear is adjusted to the target gear, the power transmission system is also adjusted from the second power transmission system back to the first power transmission system, namely, the current gear is shifted down to the target gear.
In summary, through setting up a plurality of judgement processes in engine speed promotion and gear adjustment process, guarantee the accuracy and the stability of gear shifting process, and then guarantee the transient transition of engine power, generally keep the output of power in gear shifting process to shorten the required time of gear shifting, promote the efficiency of gear shifting, promote user's use impression
Example IV
Fig. 5 is a schematic structural diagram of a control device for coaxial downshift according to a fourth embodiment of the present invention, which may be applied to an automobile with a dual clutch, wherein the device may be implemented in software and/or hardware.
Referring to fig. 5, the control device 10 for the coaxial downshift includes a gear acquisition module 100, a coaxial downshift initiation module 200, and a control module 300.
The acquiring module 100 is configured to acquire a current gear and a target gear.
The coaxial downshift initiation module 200 is configured to initiate a power coaxial downshift mode when the power transmission system in which the current gear is located and the power transmission system in which the target gear is located are both the first power transmission systems; the first power transmission system is a power transmission system under the first clutch.
The control module 300 is used for controlling the rotating speed of the engine to continuously rise to the target rotating speed and controlling the current gear to be shifted down to the target gear; the target rotating speed is the rotating speed of the engine in the target gear.
The coaxial downshift control device provided by the embodiment of the invention is used for acquiring the current gear and the target gear through the acquisition module; the coaxial downshift starting module is used for starting a power coaxial downshift mode when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system; and finally, the control module is used for controlling the rotating speed of the engine to continuously rise to the target rotating speed and simultaneously controlling the current gear to be shifted down to the target gear. Under the condition of meeting the coaxial downshift, the lifting of the rotating speed of the engine and the adjustment of the gear are controlled simultaneously, and the rotating speed of the engine is directly lifted to the rotating speed of the target gear, so that the continuous output of power in the downshift process is ensured, the time required by the downshift is shortened, the downshift efficiency is improved, and the use feeling of a user is improved.
Example five
Fig. 6 is a schematic structural diagram of a computer device according to a fifth embodiment of the present invention, and as shown in fig. 6, a computing device according to an embodiment of the present invention includes: one or more processors 41 and a storage device 42; the number of processors 41 in the device may be one or more, one processor 41 being taken as an example in fig. 6; the storage device 42 is used for storing one or more programs; the one or more programs are executed by the one or more processors 41, so that the one or more processors 41 implement the control method of the coaxial downshift according to any one of the embodiments of the present invention.
The processor 41, the storage means 42, the input means 43 and the output means 44 in the device may be connected by a bus or by other means, in fig. 6 by way of example.
The storage device 42 in the apparatus is used as a computer readable storage medium, and may be used to store one or more programs, which may be software programs, computer executable programs, and modules, such as program instructions/modules corresponding to a method for controlling a coaxial downshift according to an embodiment of the present invention (for example, the modules in the apparatus shown in fig. 5 include a gear acquisition module 100, a coaxial downshift initiation module 200, and a control module 300). The processor 41 executes various functional applications of the terminal device and data processing, namely, implements the control method of the coaxial downshift in the above-described method embodiment by running the software programs, instructions, and modules stored in the storage device 42.
The storage device 42 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the device, etc. In addition, the storage 42 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, storage 42 may further include memory located remotely from processor 41, which may be connected to the device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input means 43 may be used to receive entered numeric or character information and to generate key signal inputs related to user settings and function control of the device. The output device 44 may include a display device such as a display screen.
And, when one or more programs included in the above-described apparatus are executed by the one or more processors 41, the programs perform the following operations: acquiring a current gear and a target gear; when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under a first clutch; controlling the rotating speed of the engine to continuously rise to a target rotating speed, and simultaneously controlling the current gear to be shifted down to the target gear; the target rotating speed is the rotating speed of the engine in the target gear.
Example six
A sixth embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, is configured to perform a control method of on-axis downshift, the method including: acquiring a current gear and a target gear; when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under a first clutch; controlling the rotating speed of the engine to continuously rise to a target rotating speed, and simultaneously controlling the current gear to be shifted down to the target gear; the target rotating speed is the rotating speed of the engine in the target gear.
Alternatively, the program, when executed by the processor, may also be used to perform the control method of the on-axis downshift provided by any of the embodiments of the present invention.
The computer storage media of embodiments of the invention may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access Memory (Random Access Memory, RAM), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), a flash Memory, an optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. A computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to: electromagnetic signals, optical signals, or any suitable combination of the preceding. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, radio frequency (RadioFrequency, RF), or the like, or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (7)
1. A control method of a coaxial downshift, applied to a twin-clutch automobile, characterized by comprising:
Acquiring a current gear and a target gear;
When the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under a first clutch;
controlling the rotating speed of the engine to continuously rise to a target rotating speed, and simultaneously controlling the current gear to be downshifted to the target gear; the target rotating speed is the rotating speed of the engine in the target gear;
wherein controlling the engine speed to continue to rise to the target speed comprises:
Acquiring a target rotating speed according to a target rotating speed calculation formula; wherein target rotation speed=output shaft rotation speed, target gear speed ratio+friction speed difference; the rotation speed of the output shaft is obtained through a rotation speed sensor;
acquiring a real-time target rotating speed of the engine according to a real-time target rotating speed calculation formula; wherein, the real-time target rotation speed=engine gear shift starting rotation speed+ (target rotation speed-engine gear shift starting rotation speed) ×gear shift coefficient;
controlling the real-time target rotating speed of the engine to continuously rise to the target rotating speed;
controlling the current gear to downshift to the target gear includes:
controlling the current gear to be shifted down to an intermediate transition gear; the intermediate gear is located between the current gear and the target gear;
Controlling the intermediate transition gear to be shifted down to the target gear;
wherein controlling the current gear to downshift to the intermediate transition gear includes:
controlling the real-time gear to be adjusted to the intermediate transition gear;
Controlling the second clutch corresponding to the intermediate transition gear to charge oil;
Judging whether the real-time target rotating speed exceeds an intermediate transition rotating speed or not; the intermediate transition rotation speed is the rotation speed of the second clutch in the intermediate transition gear;
If yes, controlling the current power transmission system to be adjusted to a second power transmission system, wherein the second power transmission system is a power transmission system under the second clutch;
If not, the real-time target rotating speed is controlled to continuously increase the rotating speed.
2. The control method according to claim 1, characterized in that controlling the intermediate transition gear to downshift to the target gear includes:
controlling the real-time gear to be adjusted to the target gear;
controlling the first clutch corresponding to the target gear to charge oil;
Judging whether the real-time target rotating speed exceeds a final rotating speed or not; the final rotating speed is the rotating speed of the first clutch under the target gear;
If yes, controlling the current power transmission system to be adjusted to a first power transmission system, and completing the downshift of the current gear to the target gear;
If not, the real-time target rotating speed is controlled to continuously increase the rotating speed.
3. The control method according to claim 1, characterized by further comprising, after controlling the second clutch charge corresponding to the intermediate transition gear:
Judging whether the second clutch is filled with oil or not;
If yes, judging whether the real-time target rotating speed exceeds the intermediate transition rotating speed;
If not, the second clutch continues to be filled with oil.
4. The control method according to claim 2, characterized by further comprising, after controlling the first clutch charge corresponding to the target gear:
Judging whether the oil filling of the first clutch is finished;
if yes, judging whether the real-time target rotating speed exceeds a final rotating speed;
if not, the first clutch continues to be filled with oil.
5. The control method according to claim 4, wherein,
The first clutch is an odd clutch, and the second clutch is an even clutch;
Or the first clutch is an even clutch and the second clutch is an odd clutch.
6. A computing device, the computing device comprising:
One or more processors;
storage means for storing one or more programs,
When the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the control method of on-axis downshift of any one of claims 1-5.
7. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, implements the control method of on-axis downshift according to any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210660657.5A CN115059757B (en) | 2022-06-13 | 2022-06-13 | Control method, computing device and medium for coaxial downshift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210660657.5A CN115059757B (en) | 2022-06-13 | 2022-06-13 | Control method, computing device and medium for coaxial downshift |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115059757A CN115059757A (en) | 2022-09-16 |
| CN115059757B true CN115059757B (en) | 2024-09-13 |
Family
ID=83200180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210660657.5A Active CN115059757B (en) | 2022-06-13 | 2022-06-13 | Control method, computing device and medium for coaxial downshift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115059757B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179676A (en) * | 2015-08-11 | 2015-12-23 | 上海汽车变速器有限公司 | Braking downshifting control method for automatic six-speed wet type double-clutch transmission |
| CN112145668A (en) * | 2020-09-21 | 2020-12-29 | 东风商用车有限公司 | Method for synchronously controlling rotating speed of commercial vehicle AMT during gear shifting |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626846B (en) * | 2014-11-03 | 2018-03-27 | 比亚迪股份有限公司 | The downshift method of speed changer and the speed changer for automobile |
| CN105840808B (en) * | 2016-04-26 | 2019-03-12 | 中国第一汽车股份有限公司 | Shift control method for coordinating for wet-type double-clutch automatic speed-change device |
| CN108953591B (en) * | 2017-05-19 | 2020-08-04 | 上海汽车集团股份有限公司 | Downshift control method and device of dual-clutch transmission |
| WO2019084012A1 (en) * | 2017-10-24 | 2019-05-02 | Metropia, Inc. | Targeted traffic campaign management system |
| CN111810627B (en) * | 2020-07-08 | 2021-08-27 | 中国第一汽车股份有限公司 | Double-clutch sliding downshift control method |
-
2022
- 2022-06-13 CN CN202210660657.5A patent/CN115059757B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179676A (en) * | 2015-08-11 | 2015-12-23 | 上海汽车变速器有限公司 | Braking downshifting control method for automatic six-speed wet type double-clutch transmission |
| CN112145668A (en) * | 2020-09-21 | 2020-12-29 | 东风商用车有限公司 | Method for synchronously controlling rotating speed of commercial vehicle AMT during gear shifting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115059757A (en) | 2022-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111720535B (en) | Synchronizer control method, synchronizer control device and storage medium | |
| US8972134B2 (en) | Method of searching for touch point of clutch | |
| CN112693326B (en) | Torque reduction amount determining method and device, vehicle and storage medium | |
| KR20140053729A (en) | Motor torque control method for electric vehicle with transmission | |
| CN112392948B (en) | Vehicle power upshift method, TCU and vehicle | |
| CN112610687B (en) | Vehicle gear shifting method, device, equipment and storage medium | |
| CN114704624B (en) | Control method, control device and electronic device for coaxial downshift of double-clutch transmission | |
| CN111623113A (en) | Clutch control method for first gear and second gear increasing in starting process of double-clutch transmission | |
| CN115059757B (en) | Control method, computing device and medium for coaxial downshift | |
| CN114857255A (en) | AMT motor control method, device, electronic device, program and vehicle | |
| CN113357360B (en) | Control method and system for taking off and engaging gear of wet-type double-clutch coaxial shifting fork and vehicle | |
| CN103574024B (en) | Learn the method for the initial capacity of the clutch in double-clutch speed changer | |
| CN116857359A (en) | Gear control method, device, equipment and storage medium | |
| CN114962632B (en) | Method and device for determining gear shifting force, electronic equipment and storage medium | |
| CN115059756B (en) | Clutch control method and device, TCU and storage medium | |
| CN108374888B (en) | A kind of shift control method and system | |
| CN118088676A (en) | Clutch oil charge control method and device, automatic gearbox control unit and medium | |
| CN115046002B (en) | Method and device for controlling gear shifting of transmission, electronic equipment and storage medium | |
| CN115095653B (en) | Method and device for controlling downshift of double clutch, electronic equipment and medium | |
| JP2014126112A (en) | Method for controlling automatic transmission of vehicle | |
| CN118391435B (en) | Vehicle gear shifting control method, device, equipment and storage medium | |
| CN115638243B (en) | Method and device for determining pre-engagement point of double clutch gear, vehicle and storage medium | |
| KR101822056B1 (en) | Apparatus and method for controlling transmission of dual transmintting clutch | |
| CN118088683A (en) | Gear shifting control method, device, equipment and medium based on gearbox | |
| CN117927657A (en) | Vehicle gear shift control method and device, storage medium and vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |