CN113864445B - Gearbox control system and control method - Google Patents
Gearbox control system and control method Download PDFInfo
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- CN113864445B CN113864445B CN202111169129.1A CN202111169129A CN113864445B CN 113864445 B CN113864445 B CN 113864445B CN 202111169129 A CN202111169129 A CN 202111169129A CN 113864445 B CN113864445 B CN 113864445B
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- 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
- F16H61/02—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 characterised by the signals used
- F16H61/0262—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 characterised by the signals used the signals being hydraulic
- F16H61/0265—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 characterised by the signals used the signals being hydraulic for gearshift control, e.g. control functions for performing shifting or generation of shift signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0427—Heating
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Details Of Gearings (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention belongs to the technical field of gearbox control, and particularly relates to a gearbox control system and a gearbox control method, wherein the gearbox control system comprises a main oil cylinder, and the main oil cylinder is connected with an even-gear preparation oil cylinder, an odd-gear preparation oil cylinder, a first oil way, a second oil way and a third oil way; the odd-gear preparation oil cylinder is connected with the odd-gear oil outlet path and the odd-gear oil return path; the even-gear preparation oil cylinder is connected with the even-gear oil outlet path and the even-gear oil return path; the first oil way, the second oil way and the third oil way are provided with a heating device and a cooling device; the first oil way is connected with the reverse gear oil way, the second oil way is connected with the first oil blocking way, and the third oil way is connected with the second oil blocking way; the gear detection module is used for detecting a forward gear or reverse gear signal; the rotating speed detection module is used for detecting the rotating speed of the engine; and the gear comparison module is used for judging a target gear according to the rotating speed of the engine, comparing the target gear with the existing gear and judging the gear-up or gear-down according to the size relation.
Description
Technical Field
The invention belongs to the technical field of gearbox control, and particularly relates to a gearbox control system and a gearbox control method.
Background
The automobile gearbox plays an important role in the running process of a vehicle, so that the maintenance of the oil temperature in the gearbox is very important, and the normal operation of the gearbox is influenced by the overhigh or overlow oil temperature, so that the running of the vehicle is caused to be problematic.
A hydraulic control system for a dual clutch automatic transmission is disclosed as publication number CN 102230534B. The system comprises a suction filter, an oil pump, a cooler, a first clutch hydraulic cylinder, a second clutch hydraulic cylinder, a first-gear synchronizer hydraulic cylinder, a third-gear synchronizer hydraulic cylinder, a fifth-gear synchronizer hydraulic cylinder, a fourth-gear synchronizer hydraulic cylinder, a second-gear synchronizer hydraulic cylinder, a sixth-gear synchronizer hydraulic cylinder, a main oil path, a lubricating and cooling oil path part, a double clutch control part and a gear shifting actuator control part; the system adopts 8 proportional electromagnetic valves, 4 switching valves and 3 mechanical slide valves, the number of the electromagnetic valves which need to act simultaneously during gear selection and shifting is small, and the control is simple; two normally closed switch valves are added during clutch control, and the switch valves are directly cut off when the clutch pressure control valve fails at a working position, so that the clutch pressure oil flows back to a bottom shell to ensure the driving safety; the gear shifting actuator is controlled by adopting pressure and flow dual control, the engaging and disengaging speed is adjusted, and the gear shifting process is ensured to be stable and the riding comfort is improved.
For example, publication number CN104454685B discloses a hydraulic control system, a dual clutch transmission and an automobile, which relate to the technical field of automobile transmissions and can solve the problem of high production cost of the dual clutch transmission. The hydraulic control system includes the oil tank, the main oil circuit of being connected with the oil tank and the control oil circuit of being connected with the main oil circuit, and the control oil circuit includes: the input end of the reversing electromagnetic valve is connected with the main oil way, the output end of the reversing electromagnetic valve is connected with the mechanical reversing valve, and the output end of the mechanical reversing valve is connected with the gear shifting piston, the odd-numbered gear clutch or the even-numbered gear clutch; and the input end of the switch electromagnetic valve is connected with the main oil way, and the output end of the switch electromagnetic valve is connected with the mechanical reversing valve. The hydraulic control system, the double-clutch transmission and the automobile can reduce the production cost of the hydraulic control system, and further reduce the production cost of the double-clutch transmission and the whole automobile.
In the gearbox control system in the prior art, when reverse gear and first and second gears are switched back and forth, the temperature of hydraulic oil is high, a great amount of energy needs to be consumed to cool, and the heat cannot be effectively utilized. Meanwhile, a gearbox control system in the prior art cannot perform hydraulic oil preheating preparation according to the predicted vehicle gear.
Disclosure of Invention
In view of the above-mentioned shortcomings, the present invention provides a transmission control system and a control method.
The invention provides the following technical scheme:
a gearbox control system comprises a main oil cylinder, wherein the main oil cylinder is connected with an even-gear preparatory oil cylinder, an odd-gear preparatory oil cylinder, a first oil way, a second oil way and a third oil way;
the odd-gear preparation oil cylinder is connected with the odd-gear oil outlet path and the odd-gear oil return path;
the even-gear preparation oil cylinder is connected with the even-gear oil outlet path and the even-gear oil return path;
the odd-gear oil return path and the even-gear oil return path are both provided with coolers;
the even-gear preparation oil cylinder and the odd-gear preparation oil cylinder are connected with the intermediate shaft control oil heat exchanger;
the first oil way, the second oil way and the third oil way are provided with a heating device and a cooling device;
the first oil way is connected with the reverse gear oil way, the second oil way is connected with the first gear oil way, and the third oil way is connected with the second gear oil way;
the gear detection module is used for detecting a forward gear or reverse gear signal;
the rotating speed detection module is used for detecting the rotating speed of the engine;
and the gear comparison module is used for judging a target gear according to the rotating speed of the engine, comparing the target gear with the existing gear and judging the gear-up or gear-down according to the size relation.
A first heater is installed on the oil outlet path of the odd gears; and a second heater is installed on the oil outlet path of the even gears.
The odd-gear preparation oil cylinder is connected with a first-gear oil way through a first-gear oil way return pipe; and the even-gear preparatory oil cylinder is connected with the second-gear oil way through a second-gear oil way return pipe.
The even-gear preparation oil cylinder and the odd-gear preparation oil cylinder are both provided with a first temperature sensor.
And a second temperature sensor is arranged on each of the first oil way, the second oil way and the third oil way.
A transmission control method comprising the steps of:
s1, when a vehicle is ignited, oil of a main oil cylinder respectively enters a first oil way, a second oil way, a third oil way, an even gear preparation oil cylinder and an odd gear preparation oil cylinder; the heating device preheats the oil in the first oil circuit, the second oil circuit and the third oil circuit;
s2, detecting whether the gear is in a forward gear or a reverse gear by a gear detection module;
s2.1, when the reverse gear is performed, the oil in the first oil way enters a reverse gear oil way;
s2.1.1, detecting whether the gear is in a forward gear; when the gear is not in the forward gear, whether the gear is in the reverse gear is detected, when the gear is in the reverse gear, whether the gear is in the forward gear is detected again, and when the gear is not in the reverse gear, the oil in the reverse gear, the second oil path, the third oil path, the odd gear preparation oil cylinder and the even gear preparation oil cylinder flows back to the main oil cylinder; when the gear is in a forward gear, entering the next step;
s2.1.2 and oil in the second oil way enters a first gear oil way; oil in the reverse gear oil way flows back to the first oil way, and the temperature reduction device reduces the temperature of the oil in the first oil way;
s2.1.3, detecting whether the reverse gear is in; when the reverse gear is in, the next step is carried out; when the reverse gear is not in the reverse gear, detecting whether the reverse gear is in a forward gear or not; when the main oil cylinder is not in the forward gear, the oil in the preparation oil cylinder of the first gear, the first oil circuit, the third oil circuit, the odd gear and the even gear flows back to the main oil cylinder; when the transmission is in a forward gear, oil in a first oil way flows into the odd-gear preparation oil cylinder, the oil in a first oil way is kept warm and is reserved for reverse gear, and the oil in a third oil way enters a second oil way;
s2.1.4, the first oil way oil enters a reverse gear oil way; the oil in the first oil way flows back to the second oil way, and the temperature reduction device reduces the temperature of the oil in the second oil way;
s2.1.5, detecting whether the gear is in a forward gear; when the gear is in the forward gear, the gear is shifted to S2.1.2; when the gear is not in the forward gear, whether the gear is in the reverse gear is detected; when the reverse gear is in, continuously detecting whether the reverse gear is in a forward gear or not; when the main oil cylinder is not in the reverse gear, the oil of the preparation oil cylinder of the reverse gear, the second oil circuit, the third oil circuit and the odd-numbered gear and the even-numbered gear flows back to the main oil cylinder;
s2.2, when the transmission is in a forward gear, the oil in the second oil way enters a first-gear oil way;
s2.2.1, detecting whether the reverse gear is in the gear; when in reverse gear, go to S2.1.4; when the reverse gear is not in the gear, the next step is carried out;
s2.2.2, oil in the first gear oil way flows into the odd gear preparation oil cylinder; the oil liquid of the first oil way is kept warm and reserved for reverse gear; the oil in the third oil way enters a second oil way;
s2.2.3, detecting the engine speed by a speed detection module; the gear comparison module predicts a target gear according to the engine speed signal and compares the target gear with the existing gear; when the target gear is larger than the current gear, the gear is shifted up; when the target gear is smaller than the current gear, the gear is down-shifted;
s2.2.4, and the second-gear oil way oil flows to the even-gear preparation oil cylinder; according to the gear-up or gear-down command, pumping oil from the corresponding odd-gear preparation oil cylinder or even-gear preparation oil cylinder; oil liquid extracted from the odd-gear preparation oil cylinder flows to a corresponding odd-gear oil way through an odd-gear oil outlet way to shift gears; oil liquid extracted from the even-numbered gear preparation oil cylinder flows to a corresponding even-numbered gear oil way through the even-numbered gear oil outlet way to shift gears; oil flowing back from the odd-gear oil return circuit flows to the cooler through the odd-gear oil return circuit, and flows back to the odd-gear preparation oil cylinder after being cooled; and oil flowing back from the even-gear oil return circuit flows to the cooler through the even-gear oil return circuit, and flows back to the even-gear preparation oil cylinder after being cooled.
The intermediate shaft control oil heat exchanger is connected with the intermediate shaft control oil way and is used for preheating oil liquid in the even-gear preparation oil cylinder and the odd-gear preparation oil cylinder.
A first temperature sensor in the even-numbered gear preparation oil cylinder detects the temperature of oil in the even-numbered gear preparation oil cylinder, and when the temperature does not reach a set range, the oil in the even-numbered gear oil outlet way is heated by a heater arranged on the even-numbered gear oil outlet way; the odd-gear preparation oil cylinders are all provided with temperature sensors for detecting the temperature of oil in the odd-gear preparation oil cylinders, and when the temperature does not reach a set range, the oil in the odd-gear oil outlet path is heated by a heater arranged on the odd-gear oil outlet path.
5363 and in S2.2.2, the oil in the first gear oil way flows into the spare oil cylinder of the odd gear through the first gear oil way return pipe.
5363 and in S2.2.4, the oil in the second gear oil way flows into the even-numbered gear reserve cylinder through the return pipe of the second gear oil way.
The invention has the beneficial effects that:
1. the first oil circuit, the second oil circuit and the third oil circuit are arranged, so that the corresponding speed of the gearbox in reverse gear and first and second gears can be increased;
2. the invention can effectively utilize the heat of the high-temperature hydraulic oil, thereby saving energy;
3. according to the invention, by arranging the odd-gear preparatory oil cylinder and the even-gear preparatory oil cylinder, hydraulic oil can be preheated, so that the response speed of the gearbox during gear lifting is improved.
Drawings
FIG. 1 is a control flow diagram of the present invention;
fig. 2 is a schematic diagram of the connection of the odd-numbered stage preparatory cylinder and the even-numbered stage preparatory cylinder of the present invention.
Labeled as: the system comprises a main oil cylinder 101, an intermediate shaft control oil heat exchanger 102, an even gear preparation oil cylinder 103, a heater II 104, an odd gear preparation oil cylinder 105, a heater I106, a first gear oil way return pipe 107, a second gear oil way return pipe 108 and a cooler 109.
Detailed Description
Example one
As shown in the figure, the gearbox control system comprises a main oil cylinder, wherein the main oil cylinder is connected with an even-gear preparation oil cylinder, an odd-gear preparation oil cylinder, a first oil way, a second oil way and a third oil way; the hydraulic oil in the main oil cylinder can be pumped to the even-gear preparatory oil cylinder, the odd-gear preparatory oil cylinder, the first oil way, the second oil way and the third oil way by the oil pump.
The odd-gear preparation oil cylinder is connected with the odd-gear oil outlet path and the odd-gear oil return path, hydraulic oil in the odd-gear preparation oil cylinder can be pumped into each odd-gear oil path such as a first-gear oil path, a third-gear oil path, an N-gear oil path and the like by the oil pump through the odd-gear oil outlet path, N is an odd number, and then the gear shifting action is completed by the hydraulic oil. After gear shifting is completed, hydraulic oil in each odd-gear oil way can flow back to the odd-gear preparation oil cylinder through the odd-gear oil return circuit. The even-gear preparation oil cylinder is connected with the even-gear oil outlet path and the even-gear oil return path, hydraulic oil in the even-gear preparation oil cylinder can be pumped into each even-gear oil path through the even-gear oil outlet path by an oil pump, such as a second-gear oil path, a fourth-gear oil path, an N + 1-gear oil path and the like, wherein N is an odd number, and the gear shifting action is completed by the hydraulic oil. After gear shifting is completed, hydraulic oil in each even-numbered gear oil way can flow back to the even-numbered gear preparation oil cylinder through the even-numbered gear oil return circuit.
The odd-gear oil return circuit and the even-gear oil return circuit are respectively provided with a cooler, so that the backflow hydraulic oil in the odd-gear oil return circuit and the even-gear oil return circuit can be cooled through the coolers. And after the return hydraulic oil in the odd-gear oil return path and the even-gear oil return path is cooled to a set temperature range, the return hydraulic oil correspondingly flows into the odd-gear preparatory oil cylinder and the even-gear preparatory oil cylinder. The backflow hydraulic oil is kept within the set temperature, so that the temperature of the backflow hydraulic oil is prevented from being too low when the backflow hydraulic oil is reused. The hydraulic oil which flows back into the odd-gear preparation oil cylinder and the even-gear preparation oil cylinder can be mixed with the hydraulic oil in the odd-gear preparation oil cylinder and the even-gear preparation oil cylinder, so that the temperature of the hydraulic oil in the odd-gear preparation oil cylinder and the even-gear preparation oil cylinder can be kept at a proper temperature all the time.
The even-gear preparation oil cylinder and the odd-gear preparation oil cylinder are both connected with the intermediate shaft control oil heat exchanger, and the intermediate shaft needs to be decelerated during gear shifting, so that the intermediate shaft control oil used during deceleration needs to be cooled after being decelerated. The even-gear preparatory oil cylinder and the odd-gear preparatory oil cylinder are connected with the intermediate shaft control oil heat exchanger, and the temperature of the intermediate shaft control oil can be utilized to exchange heat with the hydraulic oil in the even-gear preparatory oil cylinder and the odd-gear preparatory oil cylinder, so that the hydraulic oil in the even-gear preparatory oil cylinder and the odd-gear preparatory oil cylinder can be preheated, namely, the heat of the intermediate shaft control oil is utilized, and the energy required for preheating the hydraulic oil in the even-gear preparatory oil cylinder and the odd-gear preparatory oil cylinder is saved.
And a heating device and a cooling device are arranged on the first oil way, the second oil way and the third oil way, so that the hydraulic oil in the first oil way, the second oil way and the third oil way can be preheated or cooled.
The first oil way is connected with the reverse gear oil way, the second oil way is connected with the first gear oil way, and the third oil way is connected with the second gear oil way. In the starting stage, a small amount of hydraulic oil is injected into the first oil way, the second oil way and the third oil way and is quickly preheated, so that the corresponding speed of vehicle control can be improved. After the hydraulic oil in the first oil way, the second oil way and the third oil way is used, the hydraulic oil can flow back to the corresponding oil way to be cooled and wait for continuous use. Because the hydraulic oil quantity in the three oil ways is less, the energy required by preheating and cooling is lower.
The control system further comprises a gear detection module for detecting a forward gear or reverse gear signal. And the rotating speed detection module is used for detecting the rotating speed of the engine. And the gear comparison module is used for judging a target gear according to the rotating speed of the engine, comparing the target gear with the existing gear and judging the gear-up or gear-down according to the size relation. When the target gear is higher than the existing gear, the gear is shifted up; and when the target gear is smaller than the existing gear, the gear is downshifted.
The oil outlet path at odd gears is provided with a first heater, and the oil outlet path at even gears is provided with a second heater. The even-gear preparation oil cylinder and the odd-gear preparation oil cylinder are both provided with a first temperature sensor. After the even-gear preparation oil cylinder, the odd-gear preparation oil cylinder and the intermediate shaft control oil heat exchanger complete heat exchange, if the hydraulic oil in the odd-gear preparation oil cylinder does not reach a set temperature range, the hydraulic oil in the odd-gear oil outlet path can be heated by the heater; if the hydraulic oil in the even-numbered gear preparation oil cylinder cannot reach the set temperature range, the hydraulic oil in the oil outlet path of the even-numbered gears can be heated by the heater.
The odd-gear preparatory oil cylinder is connected with the first-gear oil way through a first-gear oil way return pipe, and the even-gear preparatory oil cylinder is connected with the second-gear oil way through a second-gear oil way return pipe. Therefore, when appropriate, the high-temperature hydraulic oil in the first-gear oil way can flow into the odd-gear preparatory oil cylinder through the first-gear oil way return pipe, and the uncooled high-temperature hydraulic oil can increase the temperature of other hydraulic oil in the odd-gear preparatory oil cylinder. Similarly, high-temperature hydraulic oil in the second-gear oil way can flow into the even-gear preparatory oil cylinder through the second-gear oil way return pipe, and the uncooled high-temperature hydraulic oil can improve the temperature of other hydraulic oil in the even-gear preparatory oil cylinder.
And a second temperature sensor is arranged on each of the first oil way, the second oil way and the third oil way. Therefore, the hydraulic oil temperature in the first oil path, the second oil path and the third oil path can be detected.
Example two
As shown in fig. 1 and fig. 2, a transmission control method includes the following steps:
s1, when a vehicle is ignited, oil in a main oil cylinder respectively enters a first oil way, a second oil way, a third oil way, an even-gear preparation oil cylinder and an odd-gear preparation oil cylinder; the heating device preheats the oil in the first oil circuit, the second oil circuit and the third oil circuit;
s2, detecting whether the gear is in a forward gear or a reverse gear by a gear detection module;
s2.1, when the reverse gear is performed, the oil in the first oil way enters a reverse gear oil way;
s2.1.1, detecting whether the gear is in a forward gear; when the reverse gear is not in the reverse gear, returning to detect whether the reverse gear is in the reverse gear, and when the reverse gear is not in the reverse gear, returning the oil liquid of the reverse gear, the second oil path, the third oil path, the odd-numbered gear and the even-numbered gear to the main oil cylinder; when the gear is in a forward gear, entering the next step;
s2.1.2, the second oil way oil enters a first gear oil way; oil in the reverse gear oil way flows back to the first oil way, and the temperature reduction device reduces the temperature of the oil in the first oil way;
s2.1.3, detecting whether the reverse gear is in the gear; when the reverse gear is in, the next step is carried out; when the reverse gear is not in the reverse gear, detecting whether the reverse gear is in a forward gear or not; when the main oil cylinder is not in the forward gear, the oil in the preparation oil cylinder of the first gear, the first oil circuit, the third oil circuit, the odd gear and the even gear flows back to the main oil cylinder; when the transmission is in a forward gear, oil in a first oil way flows into the odd-gear preparation oil cylinder, the oil in a first oil way is kept warm and is reserved for reverse gear, and the oil in a third oil way enters a second oil way;
s2.1.4, the first oil way oil enters a reverse gear oil way; oil in the first oil way flows back to the second oil way, and the temperature reduction device reduces the temperature of the oil in the second oil way;
s2.1.5, detecting whether the gear is in a forward gear; when the gear is in the forward gear, the gear is shifted to S2.1.2; when the gear is not in the forward gear, whether the gear is in the reverse gear is detected; when the reverse gear is in, continuously detecting whether the reverse gear is in a forward gear or not; when the main oil cylinder is not in the reverse gear, the oil of the preparation oil cylinder of the reverse gear, the second oil circuit, the third oil circuit and the odd-numbered gear and the even-numbered gear flows back to the main oil cylinder;
s2.2, when the transmission is in a forward gear, the oil in the second oil path enters a first-gear oil path;
s2.2.1, detecting whether the reverse gear is in; when in reverse gear, go to S2.1.4; when the reverse gear is not in the gear, the next step is carried out;
s2.2.2, the oil in the first gear oil way flows into the preparation oil cylinder of the odd gear; the oil liquid of the first oil way is kept warm and reserved for reverse gear; the oil in the third oil way enters a second oil way;
s2.2.3, detecting the engine speed by a speed detection module; the gear comparison module predicts a target gear according to the engine speed signal and compares the target gear with the existing gear; when the target gear is larger than the existing gear, the gear is shifted up; when the target gear is smaller than the existing gear, the gear is down;
s2.2.4, and the second-gear oil way oil flows to the even-gear preparation oil cylinder; according to the gear-up or gear-down command, oil is pumped from the corresponding odd-numbered gear preparation oil cylinder or even-numbered gear preparation oil cylinder; oil liquid extracted from the odd-gear preparation oil cylinder flows to a corresponding odd-gear oil way through an odd-gear oil outlet way to perform gear shifting; oil liquid extracted from the even-numbered gear preparation oil cylinder flows to a corresponding even-numbered gear oil way through the even-numbered gear oil outlet way to shift gears; oil flowing back from the odd-gear oil return circuit flows to the cooler through the odd-gear oil return circuit, and flows back to the odd-gear preparation oil cylinder after being cooled; and oil flowing back from the even-gear oil return circuit flows to the cooler through the even-gear oil return circuit, and flows back to the even-gear preparation oil cylinder after being cooled.
The intermediate shaft control oil heat exchanger is connected with the intermediate shaft control oil way and is used for preheating oil liquid in the even-gear preparation oil cylinder and the odd-gear preparation oil cylinder.
5363 and in S2.2.2, the oil in the first gear oil way flows into the spare oil cylinder of the odd gear through the first gear oil way return pipe.
5363 and in S2.2.4, the oil in the second gear oil way flows into the even-numbered gear reserve cylinder through the return pipe of the second gear oil way.
EXAMPLE III
The difference between the embodiment and the second embodiment is that the first temperature sensor in the even-numbered gear preparation oil cylinder detects the temperature of oil in the even-numbered gear preparation oil cylinder, and when the temperature does not reach a set range, the oil in the even-numbered gear oil outlet path is heated by a heater arranged on the even-numbered gear oil outlet path; the odd-gear preparation oil cylinders are all provided with temperature sensors for detecting the temperature of oil in the odd-gear preparation oil cylinders, and when the temperature does not reach a set range, the oil in the odd-gear oil outlet path is heated by a heater arranged on the odd-gear oil outlet path.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The control method of the gearbox control system is characterized in that the control system comprises a main oil cylinder, and the main oil cylinder is connected with an even-gear preparation oil cylinder, an odd-gear preparation oil cylinder, a first oil way, a second oil way and a third oil way;
the odd-gear preparation oil cylinder is connected with the odd-gear oil outlet path and the odd-gear oil return path;
the even-gear preparation oil cylinder is connected with the even-gear oil outlet path and the even-gear oil return path;
the odd-gear oil return path and the even-gear oil return path are both provided with coolers;
the even-gear preparation oil cylinder and the odd-gear preparation oil cylinder are connected with the intermediate shaft control oil heat exchanger;
the first oil way, the second oil way and the third oil way are provided with a heating device and a cooling device;
the first oil way is connected with the reverse gear oil way, the second oil way is connected with the first gear oil way, and the third oil way is connected with the second gear oil way;
the gear detection module is used for detecting a forward gear or reverse gear signal;
the rotating speed detection module is used for detecting the rotating speed of the engine;
the gear comparison module is used for judging a target gear according to the rotating speed of the engine, comparing the target gear with the existing gear and judging the gear-up or gear-down according to the size relation;
the control method comprises the following steps:
s1, when a vehicle is ignited, oil in a main oil cylinder respectively enters a first oil way, a second oil way, a third oil way, an even-gear preparation oil cylinder and an odd-gear preparation oil cylinder; the heating device preheats the oil in the first oil circuit, the second oil circuit and the third oil circuit;
s2, detecting whether the gear is in a forward gear or a reverse gear by a gear detection module;
s2.1, when the reverse gear is achieved, the first oil path oil enters a reverse gear oil path;
s2.1.1, detecting whether the gear is in a forward gear; when the reverse gear is not in the reverse gear, returning to detect whether the reverse gear is in the reverse gear, and when the reverse gear is not in the reverse gear, returning the oil liquid of the reverse gear, the second oil path, the third oil path, the odd-numbered gear and the even-numbered gear to the main oil cylinder; when the gear is in a forward gear, entering the next step;
s2.1.2, the second oil way oil enters a first gear oil way; oil in the reverse gear oil way flows back to the first oil way, and the temperature reduction device reduces the temperature of the oil in the first oil way;
s2.1.3, detecting whether the reverse gear is in the gear; when the reverse gear is in, the next step is carried out; when the reverse gear is not in the reverse gear, detecting whether the reverse gear is in a forward gear or not; when the main oil cylinder is not in the forward gear, the oil of the first gear, the first oil circuit, the third oil circuit, the odd gear and the even gear preparation oil cylinder flows back to the main oil cylinder; when the transmission is in a forward gear, oil in a first oil way flows into the odd-gear preparation oil cylinder, the oil in a first oil way is kept warm and is reserved for reverse gear, and the oil in a third oil way enters a second oil way;
s2.1.4, the first oil way oil enters a reverse gear oil way; oil in the first oil way flows back to the second oil way, and the temperature reduction device reduces the temperature of the oil in the second oil way;
s2.1.5 detecting whether the gear is in a forward gear; when the gear is in the forward gear, the gear is shifted to S2.1.2; when the gear is not in the forward gear, whether the gear is in the reverse gear is detected; when the reverse gear is in, continuously detecting whether the reverse gear is in a forward gear or not; when the transmission is not in the reverse gear, the oil in the preparation oil cylinder of the reverse gear, the second oil circuit, the third oil circuit and the odd-numbered gear and the even-numbered gear flows back to the main oil cylinder;
s2.2, when the transmission is in a forward gear, the oil in the second oil way enters a first-gear oil way;
s2.2.1, detecting whether the reverse gear is in; when in reverse gear, go to S2.1.4; when the reverse gear is not in the gear, the next step is carried out;
s2.2.2, the oil in the first gear oil way flows into the preparation oil cylinder of the odd gear; the oil liquid in the first oil way is kept warm and reserved for reverse gear; the oil in the third oil way enters a second oil way;
s2.2.3, detecting the engine speed by a speed detection module; the gear comparison module predicts a target gear according to the engine speed signal and compares the target gear with the existing gear; when the target gear is larger than the existing gear, the gear is shifted up; when the target gear is smaller than the current gear, the gear is down-shifted;
s2.2.4, and the second-gear oil way oil flows to the even-gear preparation oil cylinder; according to the gear-up or gear-down command, pumping oil from the corresponding odd-gear preparation oil cylinder or even-gear preparation oil cylinder; oil liquid extracted from the odd-gear preparation oil cylinder flows to a corresponding odd-gear oil way through an odd-gear oil outlet way to shift gears; oil liquid extracted from the even-numbered gear preparation oil cylinder flows to a corresponding even-numbered gear oil way through the even-numbered gear oil outlet way to shift gears; oil flowing back from the odd-gear oil return circuit flows to the cooler through the odd-gear oil return circuit, and flows back to the odd-gear preparation oil cylinder after being cooled; and oil flowing back from the even-gear oil return circuit flows to the cooler through the even-gear oil return circuit, and flows back to the even-gear preparation oil cylinder after being cooled.
2. The control method according to claim 1, characterized in that: the intermediate shaft control oil heat exchanger is connected with the intermediate shaft control oil way and is used for preheating oil liquid in the even-gear preparation oil cylinder and the odd-gear preparation oil cylinder.
3. The control method according to claim 1, characterized in that: a first temperature sensor in the even-numbered gear preparation oil cylinder detects the temperature of oil in the even-numbered gear preparation oil cylinder, and when the temperature does not reach a set range, the oil in the even-numbered gear oil outlet path is heated by a heater arranged on the even-numbered gear oil outlet path; the odd-gear preparation oil cylinders are all provided with temperature sensors for detecting the temperature of oil in the odd-gear preparation oil cylinders, and when the temperature does not reach a set range, the oil in the odd-gear oil outlet path is heated by a heater arranged on the odd-gear oil outlet path.
4. The control method according to claim 1, characterized in that: s2.2.2, the oil in the first gear oil way flows into the spare oil cylinder of the odd gear through the return pipe of the first gear oil way.
5. The control method according to claim 4, characterized in that: s2.2.4, oil in a second gear oil way flows into a spare oil cylinder in an even gear through a return pipe of a second gear oil way.
6. The control method according to claim 1, characterized in that: a first heater is installed on the oil outlet path of the odd gears; and a second heater is installed on the oil outlet path of the even gears.
7. The control method according to claim 6, characterized in that: the odd-gear preparation oil cylinder is connected with a first-gear oil way through a first-gear oil way return pipe; and the even-gear preparatory oil cylinder is connected with the second-gear oil way through a second-gear oil way return pipe.
8. The control method according to claim 7, characterized in that: the even-gear preparation oil cylinder and the odd-gear preparation oil cylinder are both provided with a first temperature sensor.
9. The control method according to claim 1, characterized in that: and a second temperature sensor is arranged on each of the first oil way, the second oil way and the third oil way.
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| JP2002039230A (en) * | 2000-07-31 | 2002-02-06 | Toyota Motor Corp | Control device for vehicle transmission |
| CN102168754B (en) * | 2011-04-08 | 2013-10-30 | 浙江万里扬变速器股份有限公司 | Hydraulic control system for wet-type double-clutch automatic transmission |
| CN102889269B (en) * | 2012-09-27 | 2015-10-28 | 三一重工股份有限公司 | Pretension oil cylinder working-pressure detection system, super lifting device and hoist |
| JP6723839B2 (en) * | 2016-06-09 | 2020-07-15 | 株式会社クボタ | Hydraulic system of work machine |
| CN109442035B (en) * | 2019-01-24 | 2019-05-21 | 盛瑞传动股份有限公司 | Gear interlocking hydraulic control system and gearbox |
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