CN112443655A - Clutch semi-joint point self-adaption method and device, control equipment and storage medium - Google Patents
Clutch semi-joint point self-adaption method and device, control equipment and storage medium Download PDFInfo
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- CN112443655A CN112443655A CN201910814640.9A CN201910814640A CN112443655A CN 112443655 A CN112443655 A CN 112443655A CN 201910814640 A CN201910814640 A CN 201910814640A CN 112443655 A CN112443655 A CN 112443655A
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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
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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
- F16H61/04—Smoothing ratio shift
Abstract
The invention is suitable for the technical field of wet type double clutch automatic transmission control, and provides a clutch semi-joint self-adaption method, a device, control equipment and a storage medium, wherein the method comprises the following steps: when the self-adaptive enabling condition of the half-joint is met, calculating a first average rotation speed difference change rate of the input rotation speed of the transmission and the rotation speed of the target clutch, controlling the oil filling of the target clutch by taking the pressure value of the current half-joint as a target pressure value, calculating a second average rotation speed difference change rate of the input rotation speed of the transmission and the rotation speed of the target clutch when the pressure difference between the actual pressure value and the target pressure value in the oil filling process is smaller than a preset first pressure threshold value, and updating the pressure value of the half-joint according to the change rate difference between the first average rotation speed difference change rate and the second average rotation speed difference change rate, so that the influence of the combination of the working environment and the working state of the vehicle on the half-joint determining process is reduced, more accurate half-joint pressure value is obtained, and the smoothness of the vehicle driving process is improved.
Description
Technical Field
The invention belongs to the technical field of control of wet type double-clutch automatic transmissions, and particularly relates to a clutch semi-joint point self-adaption method, a device, control equipment and a storage medium.
Background
The semi-joint point of the clutch of the wet type double-clutch automatic transmission plays an important role in starting, crawling and gear lifting control, the accuracy of the control is directly influenced, but the semi-joint point of the clutch changes along with the aging of a hydraulic system in the using process of the transmission and the abrasion of a friction plate and a hydraulic cylinder of the transmission, so that the semi-joint point self-learning has high necessity.
Disclosure of Invention
The invention aims to provide a clutch half-joint self-adaption method, a clutch half-joint self-adaption device, control equipment and a storage medium, and aims to solve the problem that the smoothness of an automobile is possibly reduced due to the fact that the clutch half-joint changes caused by the aging of a hydraulic system in the process of using a transmission and the abrasion of a friction plate and a hydraulic cylinder of the transmission in the using process of the automobile.
In one aspect, the present invention provides a clutch semi-clutch joint adaptive method, comprising the steps of:
judging whether a semi-joint self-adaption enabling condition of the clutch is met;
when the semi-joint point self-adaption enabling condition is met, controlling a counter to execute a first counting operation according to a preset time period to obtain a first counting value, and calculating a first average rotation speed difference change rate of the input rotation speed of the transmission and the rotation speed of the target clutch;
when the first counting value is larger than a preset first counting threshold value, controlling the oil filling of the target clutch by taking the pressure value of the current half-combination point as a target pressure value, and calculating the pressure difference between the actual pressure value and the target pressure value in the oil filling process of the target clutch;
when the pressure difference is smaller than a preset first pressure threshold value, controlling a counter to execute a second counting operation according to the time period to obtain a second counting value, and calculating a second average speed difference change rate of the input speed of the transmission and the target clutch speed;
and when the second count value is larger than a preset second count threshold value, updating the pressure value of the half-junction point according to the change rate difference value of the first average rotating speed difference change rate and the second average rotating speed difference change rate.
Preferably, the half-binding-point adaptation enabling condition includes:
the acquired oil temperature of the gearbox is greater than a preset temperature threshold value;
the obtained gear of the transmission is in a steady state gear, and the shaft where the target clutch is located is an uncontrolled shaft;
all shifting forks on the obtained shaft of the target clutch are in neutral positions;
the acquired transmission input torque value is a positive value and is greater than a preset minimum torque threshold value;
the difference value of the acquired transmission input rotating speed and the target clutch rotating speed is larger than the minimum rotating speed difference threshold value;
and performing half-joint point self-adaption on the acquired steady-state gear.
Preferably, after the step of calculating the pressure difference between the actual pressure value and the target pressure value in the process of filling the target clutch, the method further comprises the following steps:
and when the duration of the pressure difference being greater than or equal to the first pressure threshold is greater than a preset duration threshold, the clutch semi-joint adaptation is exited.
Preferably, the step of updating the pressure value of the half junction point according to the change rate difference value of the first average rotational speed difference change rate and the second average rotational speed difference change rate includes:
calculating a change rate difference value of the first average rotational speed difference change rate and the second average rotational speed difference change rate;
comparing the change rate difference value with a preset first change rate threshold value and a preset second change rate threshold value;
when the change rate difference value is smaller than the first change rate threshold value, increasing the pressure value of the half-combination point according to a preset step length;
when the change rate difference is larger than the second change rate threshold, reducing the pressure value of the half-combination point according to the step length;
and when the change rate difference value is greater than or equal to the first change rate threshold value and less than or equal to the second change rate threshold value, keeping the pressure value of the half-combination point unchanged.
Preferably, the first and second electrodes are formed of a metal,
the first change rate threshold is the minimum torque value when the target clutch starts to transmit torque/the rotational inertia of the shaft of the target clutch;
the second rate of change threshold is the maximum torque value at which the target clutch begins to transmit torque/the moment of inertia of the shaft on which the target clutch is located.
Preferably, after the step of calculating the second average rate of change of the speed difference between the transmission input speed and the target clutch speed, the method further comprises:
and controlling the target clutch to discharge oil so as to restore the target clutch to the state before oil charging.
Preferably, the first and second electrodes are formed of a metal,
controlling a counter to execute a second counting operation according to the time period to obtain a second counting value, and calculating a second average speed difference change rate of the input speed of the transmission and the target clutch speed, wherein the step comprises the following steps:
calculating a second speed difference between the transmission input speed and the target clutch speed;
and when the second rotating speed difference is smaller than a preset rotating speed difference threshold value and the second counting value is smaller than or equal to a preset second counting threshold value, skipping to the step of controlling oil discharge of the target clutch.
In another aspect, the present invention provides a clutch semi-coupling point adaptive device, comprising:
a condition judgment unit for judging whether a semi-joint adaptive enabling condition of the clutch is satisfied;
the first calculating unit is used for controlling the counter to execute a first counting operation according to a preset time period to obtain a first counting value and calculating a first average rotating speed difference change rate of the input rotating speed of the transmission and the rotating speed of the target clutch when the semi-joint adaptive enabling condition is met;
the oil filling control unit is used for controlling the oil filling of the target clutch by taking the pressure value of the current half-combination point as a target pressure value and calculating the pressure difference between the actual pressure value and the target pressure value in the oil filling process of the target clutch when the first counting value is greater than a preset first counting threshold value;
the second calculating unit is used for controlling the counter to execute second counting operation according to the time period when the pressure difference is smaller than a preset first pressure threshold value to obtain a second counting value, and calculating a second average rotating speed difference change rate of the input rotating speed of the transmission and the rotating speed of the target clutch; and
and the pressure value updating unit is used for updating the pressure value of the half-joint point according to the change rate difference value of the first average rotating speed difference change rate and the second average rotating speed difference change rate when the second counting value is larger than a preset second counting threshold value.
In another aspect, the present invention also provides a control device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method when executing the computer program.
In another aspect, the present invention also provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method as described above.
The present invention determines whether a semi-clutch adaptive enabling condition is satisfied, and when the semi-clutch adaptive enabling condition is satisfied, a first average differential rotational speed rate of change of the transmission input rotational speed and the target clutch rotational speed is calculated, then, the pressure value of the current half-combination point is taken as a target pressure value to control the target clutch to fill oil, when the pressure difference between the actual pressure value and the target pressure value in the oil filling process is smaller than a preset first pressure threshold value, calculating a second average rate of change of speed difference between the transmission input speed and the target clutch speed, the pressure value of the half-joint point is updated according to the change rate difference value of the first average rotating speed difference change rate and the second average rotating speed difference change rate, thereby reducing the influence of the working environment and the working state of the vehicle on the determination process of the half-joint point, and then obtain more accurate half the pressure value of the joint point, has improved the ride comfort of vehicle driving process.
Drawings
FIG. 1 is a flowchart illustrating an implementation of a clutch semi-clutch adaptive method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an implementation of a pressure value updating method for a half-join point according to a second embodiment of the present invention;
FIG. 3 is a flowchart of an implementation of a clutch semi-joint adaptive method according to a third embodiment of the present invention;
FIG. 4 is a diagram illustrating an example of a process of changing an actual pressure and a rotating speed of a target clutch in a clutch semi-clutch adaptive process according to a fourth embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a clutch semi-joint adaptive device provided by a fifth embodiment of the invention; and
fig. 6 is a schematic structural diagram of a control device according to a sixth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description of specific implementations of the present invention is provided in conjunction with specific embodiments:
the first embodiment is as follows:
fig. 1 shows a flow of implementing a clutch semi-joint adaptive method provided by a first embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:
s10: and judging whether a semi-joint self-adaption enabling condition of the clutch is met.
In an embodiment of the present invention, when determining whether a semi-joint adaptive enabling condition of the clutch is satisfied, the semi-joint adaptive enabling condition may include that the acquired temperature sensor, the pressure sensor, and the solenoid valve of the transmission are all in a normal operating state, preferably, the semi-joint adaptive enabling condition includes that the acquired oil temperature of the transmission is greater than a preset temperature threshold value, the acquired gear of the transmission is in a steady-state gear and the shaft of the target clutch is an uncontrolled shaft, all the acquired shift forks on the shaft of the target clutch are in a neutral position, the acquired transmission input torque value is a positive value and is greater than a preset minimum torque threshold value, the difference between the acquired transmission input rotation speed and the target clutch rotation speed is greater than a minimum rotation speed difference threshold value, and the acquired steady-state gear is not subjected to semi-joint adaptive adaptation, therefore, when the conditions are simultaneously met, the semi-joint self-adaption enabling condition of the clutch is judged to be met, and the reliability of the semi-joint self-adaption of the clutch is improved. Of course, the half-join-point adaptation enabling condition may include other conditions than the above, and is not limited herein.
S11: when the semi-joint adaptive enabling condition is met, the counter is controlled to execute a first counting operation according to a preset time period to obtain a first counting value, and a first average rotating speed difference change rate of the input rotating speed of the transmission and the rotating speed of the target clutch is calculated.
In the embodiment of the present invention, when the half-clutch adaptive enable condition is satisfied, the half-clutch adaptive enable command is triggered, the control counter performs a first counting operation according to a preset time period, when the first counting operation is performed, the first timing operation may be performed when the half-clutch adaptive enable command is triggered, a first timing duration corresponding to the first timing operation is compared with the preset time period, and when the first timing duration satisfies the preset time period, the control counter performs an adding operation to obtain a first count value, the time period may be an operation period of an automatic Transmission Control Unit (TCU), for example, the time period is 10 ms, or, of course, a time period other than the above may be set, which is not limited herein, and for convenience of subsequent calculation, an initial value of the counter may be zero, and the target clutch is the adaptive target clutch this time, after the first timing operation is performed, when the first count value is less than or equal to a preset first count threshold value, a first average differential rotational speed change rate of the transmission input rotational speed and the target clutch rotational speed is calculated, and when the first count value is greater than the preset first count threshold value, the first timing operation is stopped, and the process jumps to step S12.
When calculating the first average differential rotation rate of the transmission input rotation speed and the target clutch rotation speed, specifically, obtaining the target clutch rotation speed and the transmission input rotation speed corresponding to each first count value, and calculating the first average differential rotation rate by using the following formula:
DiffSpeedStep2(TCStp2)＝IPSpeed(TCStp2)-TrgtClutchSpeed(TCStp2)，TCStp2＝1、2、3……TCTStp2
when the first count value TCStp2 is not less than CalNum,
when the first count value CalNum < TCStp2 ≦ TCTStp2,
where IPSpeed represents the transmission input speed, trgtcluttspeed represents the target clutch speed, TCStp2 represents the first count value, TCTStp2 represents the first count threshold, CalNum represents the calculation interval of the rate of change of the target clutch speed from the input speed differential, T represents the time period, diffsprastepp 2 represents the first rate of change of the adaptive target clutch speed from the input speed, diffspeedstepp 2 represents the first rate of change of the target clutch speed from the input speed, and avgdiffrasstepp 2 represents the first rate of change of the average speed differential.
S12: and when the first counting value is larger than a preset first counting threshold value, controlling the target clutch to fill oil by taking the pressure value of the current half-joint point as a target pressure value, and calculating the pressure difference between the actual pressure value and the target pressure value in the oil filling process of the target clutch.
In the embodiment of the invention, the pressure value of the current half-joint is the pressure value of the half-joint after the previous clutch half-joint adaptive process is completed, namely the pressure of the target clutch half-joint is not changed after the previous clutch half-joint adaptive process is completed and before the step of calculating the pressure difference between the actual pressure value and the target pressure value in the target clutch oil filling process. When the first counting value is larger than a preset first counting threshold value, controlling the target clutch to fill oil by taking the pressure value of the current half-combination point as a target pressure value, calculating the pressure difference between the actual pressure value and the target pressure value in the oil filling process of the target clutch, wherein the pressure difference is | the target pressure value-actual pressure value |, when the pressure difference is larger than or equal to the first pressure threshold value, indicating that the target clutch does not finish the oil filling process of the target clutch, and when the pressure difference is smaller than the first pressure threshold value, indicating that the pressure of the target clutch is stabilized, finishing oil filling of the target clutch, wherein the first pressure threshold value is a value for judging the pressure stability condition of the target clutch.
Preferably, when the duration of the pressure difference being greater than or equal to the first pressure threshold is greater than a preset duration threshold, which is not limited herein, the vehicle may be out of order and the clutch semi-clutch adaptation may be exited, so as to improve the reliability of the clutch semi-clutch adaptation.
S13: and when the pressure difference is smaller than a preset first pressure threshold value, controlling the counter to execute a second counting operation according to a time period to obtain a second counting value, and calculating a second average rotating speed difference change rate of the input rotating speed of the transmission and the rotating speed of the target clutch.
In the embodiment of the present invention, when the pressure difference is smaller than the preset first pressure threshold, it indicates that the target clutch has completed oil filling, the counter is controlled to perform a second counting operation according to the preset time period, when the second counting operation is performed, a second timing operation may be performed from a time when the pressure difference is determined to be smaller than the preset first pressure threshold, a second timing duration corresponding to the second timing operation is compared with the preset time period, and when the second timing duration satisfies the preset time period, the counter is controlled to perform an adding operation to obtain a second count value. After controlling the counter to perform the adding operation, when the second count value is less than or equal to a preset second count threshold value, calculating a second average differential rotation speed change rate of the transmission input rotation speed and the target clutch rotation speed, and when the second count value is greater than the preset second count threshold value, jumping to step S14 and stopping the second timing operation.
When calculating a second average differential rotation rate of the input rotation speed of the transmission and the target clutch rotation speed, acquiring the target clutch rotation speed and the input rotation speed of the transmission corresponding to each second counting value, and calculating the second average differential rotation rate by using the following formula:
DiffSpeedStep4(TCStp4)＝IPSpeed(TCStp4)-TrgtClutchSpeed(TCStp4)，TCStp4＝1、2、3……TCTStp4
when the second count value TCStp4 is not less than CalNum,
when the second count value CalNum < TCStp4 ≦ TCTStp4,
where IPSpeed represents the transmission input speed, trgtcluttspeed represents the target clutch speed, TCStp4 represents the second count value, TCTStp4 represents the second count threshold, CalNum represents the calculation interval of the rate of change of the target clutch speed from the input speed differential, T represents the time period, diffsprastepp 4 represents the second rate of change of the adaptive target clutch speed from the input speed, diffspeedstepp 4 represents the second rate of change of the target clutch speed from the input speed, and avgdiffrasstepp 4 represents the second rate of change of the average speed differential.
After the step of calculating the second average speed difference change rate between the input speed of the transmission and the rotating speed of the target clutch, preferably, controlling the target clutch to unload oil so as to restore the target clutch to the state before oil filling, acquiring an actual pressure value of the target clutch in the process of unloading the target clutch, and finishing the clutch semi-joint self-adaptive process when the acquired actual pressure value of the target clutch is smaller than a preset second pressure threshold value. And the second pressure threshold is a clutch pressure threshold for judging the separation of the target clutch, if the second pressure threshold is smaller than the second pressure threshold, the clutch is considered to be completely separated, and the clutch semi-joint self-adaption process is finished.
When the second speed difference is smaller than the preset speed difference threshold value and the second counting value is smaller than or equal to the preset second counting threshold value, the calculation condition of the second average speed difference change rate does not meet the counting requirement, at the moment, the second counting operation is stopped, and the step of controlling the target clutch to unload oil is skipped, so that the pressure value of the half-joint point is not updated when the calculation requirement of the second average speed difference change rate is not met, and the reliability and the accuracy of clutch half-joint point self-adaptation are improved.
S14: and when the second counting value is larger than a preset second counting threshold value, updating the pressure value of the half-joint point according to the change rate difference value of the first average rotating speed difference change rate and the second average rotating speed difference change rate.
In this embodiment of the present invention, the pressure value at the half-joint point is updated according to the change rate difference between the first average rotational speed difference change rate and the second average rotational speed difference change rate, which is described in the second embodiment and is not described herein again. It should be noted that, when the second count value is greater than the preset second count threshold value, the updating of the half-junction point pressure value is started simultaneously with the oil discharge of the clutch.
In the embodiment of the invention, whether a semi-joint point self-adaption enabling condition of the clutch is met or not is judged, when the semi-joint point self-adaption enabling condition is met, a first average rotating speed difference change rate of the input rotating speed of the transmission and the rotating speed of the target clutch is calculated, then the pressure value of the current semi-joint point is taken as a target pressure value to control the oil filling of the target clutch, when the pressure difference between the actual pressure value and the target pressure value in the oil filling process of the target clutch is smaller than a preset first pressure threshold value, a second average rotating speed difference change rate of the input rotating speed of the transmission and the rotating speed of the target clutch is calculated, the pressure value of the semi-joint point is updated according to the change rate of the first average rotating speed difference change rate and the change rate of the second average rotating speed difference change rate, so that the influence of the working environment and the working state of the vehicle on the semi-joint point determining process, the smoothness of the driving process is improved.
Example two:
fig. 2 shows a specific implementation flow of the pressure value updating method for a half-junction according to the second embodiment of the present invention, and for convenience of description, only the relevant portions of the second embodiment of the present invention are shown, which is detailed as follows:
s20: a difference in the rate of change of the first average rotational speed difference rate of change and the second average rotational speed difference rate of change is calculated.
In the embodiment of the invention, when the change rate difference value between the first average rotation speed difference change rate and the second average rotation speed difference change rate is calculated, the change rate difference value is the second average rotation speed difference change rate-the first average rotation speed difference change rate, the adaptation error caused by dragging of the transmission in the clutch semi-joint point self-adaptation process is eliminated through the difference value of the two average rotation speed difference change rates, and the influence of the target clutch input rotation speed or the change of the vehicle speed on the clutch semi-joint point self-adaptation process is eliminated through the rotation speed difference change rate of the target clutch rotation speed and the transmission input rotation speed. Wherein the product of the difference and the inertia of the shaft on which the current target clutch is located is the torque applied to the shaft on which the current half-junction point is located.
S21: the rate of change difference is compared to a preset first rate of change threshold and a preset second rate of change threshold.
In the embodiment of the present invention, the confirmation of the two thresholds of the first change rate threshold and the second change rate threshold can be calculated by a test physical definition of a half-joint point, one of the half-joint point physical definitions is a point at which the clutch just starts to transmit torque, the torque value is generally 3 to 5nm, so that preferably, the first change rate threshold is the minimum torque value when the target clutch starts to transmit torque/the rotational inertia of the shaft of the target clutch, the second change rate threshold is the maximum torque value when the target clutch starts to transmit torque/the rotational inertia of the shaft of the target clutch, since the two thresholds of the first change rate threshold and the second change rate threshold have actual physical meanings, the threshold standard is found by the actual physical meanings, so as to reduce the workload of determining the threshold rule by collecting data through tests, which needs to be explained herein, the sequence of comparing the change rate difference with the first change rate threshold and the second change rate threshold is not limited herein.
S22: and when the change rate difference is smaller than the first change rate threshold value, increasing the pressure value of the half-combination point according to a preset step length.
In the embodiment of the present invention, when the change rate difference is smaller than the first change rate threshold, it indicates that the current pressure value of the half-joint point of the clutch is smaller, and the pressure value of the half-joint point needs to be increased according to a preset step size, where the step size is the minimum step size for increasing or decreasing the half-joint point.
S23: and when the change rate difference value is larger than a second change rate threshold value, reducing the pressure value of the half-combination point according to a preset step length.
In the embodiment of the present invention, when the change rate difference is greater than the second change rate threshold, it indicates that the current pressure value of the clutch half-joint point is larger, and the pressure value of the half-joint point needs to be reduced according to the preset step length.
S24: and when the change rate difference value is greater than or equal to the first change rate threshold value and less than or equal to the second change rate threshold value, keeping the pressure value of the half-combination point unchanged.
In the embodiment of the invention, when the change rate difference is greater than or equal to the first change rate threshold and less than or equal to the second change rate threshold, the pressure value of the current clutch half-joint point is in the robustness interval of control, and the pressure value of the half-joint point is kept unchanged.
Example three:
fig. 3 shows a flow of implementing the clutch semi-joint adaptive method provided by the third embodiment of the present invention, and for convenience of description, only the parts related to the third embodiment of the present invention are shown, and the details are as follows:
s30: judging whether a semi-joint adaptive enabling condition of the clutch is met, and jumping to step S31 when the semi-joint adaptive enabling condition is met;
s31: controlling a counter to execute a first counting operation according to a preset time period to obtain a first counting value, calculating a first average rotating speed difference change rate of the input rotating speed of the transmission and the rotating speed of the target clutch, and jumping to the step S32 when the first counting value is greater than a preset first counting threshold value;
s32: controlling the target clutch to fill oil by taking the pressure value of the current half-combination point as a target pressure value, calculating the pressure difference between the actual pressure value and the target pressure value in the oil filling process of the target clutch, jumping to step S33 when the duration of the pressure difference being greater than or equal to the first pressure threshold is greater than a preset duration threshold, and jumping to step S34 when the pressure difference being less than the preset first pressure threshold;
s33: clutch withdrawal semi-clutch engagement point adaptation;
s34: controlling a counter to execute a second counting operation according to a time period to obtain a second counting value, calculating a second average rotating speed difference change rate of the input rotating speed of the transmission and the rotating speed of the target clutch, jumping to step S35 and step S40 when the second counting value is larger than a preset second counting threshold value, and jumping to step S40 when the second rotating speed difference is smaller than the preset rotating speed difference threshold value and the second counting value is smaller than or equal to the preset second counting threshold value;
s35: comparing the change rate difference value of the first average rotation speed difference change rate and the second average rotation speed difference change rate with a preset first change rate threshold value, judging whether the change rate difference value is smaller than the first change rate threshold value, if so, jumping to the step S37, otherwise, jumping to the step S36;
s36: comparing the change rate difference value with a preset second change rate threshold value, and judging whether the change rate difference value is larger than the second change rate threshold value, if so, skipping to the step S38, otherwise, skipping to the step S39;
s37: increasing the pressure value of the half-joint point according to a preset step length;
s38: reducing the pressure value of the half-joint point according to a preset step length;
s39: the pressure value at the half-junction point was kept constant.
In the embodiment of the present invention, the detailed implementation of steps S30-S39 can be referred to the description of the first embodiment and the second embodiment, and will not be described herein again.
S40: and controlling the target clutch to unload oil.
In the embodiment of the invention, when the oil discharge of the target clutch is controlled, the actual pressure value of the target clutch is acquired, and when the acquired actual pressure value of the target clutch is smaller than the preset second pressure threshold value, the clutch half-joint self-adaptation is finished. And the second pressure threshold is a clutch pressure threshold for judging the separation of the target clutch, if the second pressure threshold is smaller than the second pressure threshold, the clutch is considered to be completely separated, and the clutch semi-joint self-adaption process is finished.
Example four:
fig. 4 shows a target clutch actual pressure and rotation speed variation process in the clutch semi-clutch adaptive process provided by the fourth embodiment of the present invention, and for convenience of description, only the relevant parts of the embodiment of the present invention are shown, and the following details are provided:
the clutch semi-clutch spot adaptation process shown in FIG. 4 includes five stages: the method comprises a first average rotating speed difference change rate calculation stage, a target clutch oil filling stage, a second average rotating speed difference change rate calculation stage, a target clutch oil discharging stage and a half-joint pressure value updating stage, wherein it is to be noted that the half-joint pressure value updating is completed in an initial stage of the target clutch oil discharging.
Example five:
fig. 5 shows the structure of a clutch semi-bonding point adaptive device provided by a fifth embodiment of the present invention, and for convenience of explanation, only the parts related to the embodiment of the present invention are shown, which include:
a condition judgment unit 51 for judging whether a semi-joint adaptive enabling condition of the clutch is satisfied;
a first calculating unit 52, configured to control the counter to perform a first counting operation according to a preset time period when the semi-joint adaptive enabling condition is satisfied, to obtain a first count value, and calculate a first average rotational speed difference change rate between the transmission input rotational speed and the target clutch rotational speed;
the oil filling control unit 53 is configured to control the target clutch to fill oil by taking the pressure value of the current half-junction point as a target pressure value and calculate a pressure difference between an actual pressure value and the target pressure value in an oil filling process of the target clutch when the first count value is greater than a preset first count threshold value;
a second calculating unit 54, configured to control the counter to perform a second counting operation according to a time period when the pressure difference is smaller than the preset first pressure threshold, so as to obtain a second count value, and calculate a second average speed difference change rate between the transmission input speed and the target clutch speed; and
and a pressure value updating unit 55, configured to update the pressure value at the half-junction point according to a change rate difference between the first average rotational speed difference change rate and the second average rotational speed difference change rate when the second count value is greater than a preset second count threshold value.
In the embodiment of the present invention, each unit of the clutch semi-combination adaptive device may be implemented by a corresponding hardware or software unit, and each unit may be an independent software or hardware unit, or may be integrated into a software or hardware unit, which is not limited herein. For specific implementation of each unit of the clutch semi-joint adaptive device, reference may be made to the descriptions of the first embodiment to the fourth embodiment, and further description is omitted here.
Example six:
fig. 6 shows a structure of a control device according to a sixth embodiment of the present invention, and for convenience of explanation, only a part related to the embodiment of the present invention is shown.
The control device 6 of an embodiment of the present invention comprises a processor 60, a memory 61 and a computer program 62 stored in the memory 61 and executable on the processor 60. The processor 60, when executing the computer program 62, implements the steps in the above-described method embodiments, such as the steps S10-S14 shown in fig. 1. Alternatively, the processor 60, when executing the computer program 62, implements the functions of the units in the above-described device embodiments, such as the functions of the units 51 to 55 shown in fig. 5.
In the embodiment of the invention, by judging whether the semi-joint adaptive enabling condition of the clutch is met, when the semi-joint adaptive enabling condition is satisfied, a first average rotational speed difference change rate of the transmission input rotational speed and the target clutch rotational speed is calculated, then, the pressure value of the current half-combination point is taken as a target pressure value to control the target clutch to fill oil, when the pressure difference between the actual pressure value and the target pressure value in the oil filling process is smaller than a preset first pressure threshold value, calculating a second average rate of change of speed difference between the transmission input speed and the target clutch speed, the pressure value of the half-joint point is updated according to the change rate difference value of the first average rotating speed difference change rate and the second average rotating speed difference change rate, thereby reducing the influence of the working environment and the working state of the vehicle on the determination process of the half-joint point, and then obtain more accurate half the pressure value of the joint point, has improved the ride comfort of vehicle driving process.
Example seven:
in an embodiment of the present invention, a computer-readable storage medium is provided, which stores a computer program that, when executed by a processor, implements the steps in the above-described method embodiments, for example, steps S10 to S14 shown in fig. 1. Alternatively, the computer program, when executed by a processor, implements the functionality of the units in the device embodiments described above, such as the functionality of units 51 to 55 shown in fig. 5.
In the embodiment of the invention, by judging whether the semi-joint adaptive enabling condition of the clutch is met, when the semi-joint adaptive enabling condition is satisfied, a first average rotational speed difference change rate of the transmission input rotational speed and the target clutch rotational speed is calculated, then, the pressure value of the current half-combination point is taken as a target pressure value to control the target clutch to fill oil, when the pressure difference between the actual pressure value and the target pressure value in the oil filling process is smaller than a preset first pressure threshold value, calculating a second average rate of change of speed difference between the transmission input speed and the target clutch speed, the pressure value of the half-joint point is updated according to the change rate difference value of the first average rotating speed difference change rate and the second average rotating speed difference change rate, thereby reducing the influence of the working environment and the working state of the vehicle on the determination process of the half-joint point, and then obtain more accurate half the pressure value of the joint point, has improved the ride comfort of vehicle driving process.
The computer readable storage medium of the embodiments of the present invention may include any entity or device capable of carrying computer program code, a recording medium, such as a ROM/RAM, a magnetic disk, an optical disk, a flash memory, or the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A clutch semi-clutch engagement point adaptive method, comprising the steps of:
judging whether a semi-joint self-adaption enabling condition of the clutch is met;
when the semi-joint point self-adaption enabling condition is met, controlling a counter to execute a first counting operation according to a preset time period to obtain a first counting value, and calculating a first average rotation speed difference change rate of the input rotation speed of the transmission and the rotation speed of the target clutch;
when the first counting value is larger than a preset first counting threshold value, controlling the oil filling of the target clutch by taking the pressure value of the current half-combination point as a target pressure value, and calculating the pressure difference between the actual pressure value and the target pressure value in the oil filling process of the target clutch;
when the pressure difference is smaller than a preset first pressure threshold value, controlling a counter to execute a second counting operation according to the time period to obtain a second counting value, and calculating a second average speed difference change rate of the input speed of the transmission and the target clutch speed;
and when the second count value is larger than a preset second count threshold value, updating the pressure value of the half-junction point according to the change rate difference value of the first average rotating speed difference change rate and the second average rotating speed difference change rate.
2. The method of claim 1, wherein the semi-nexus adaptation-enabling condition comprises:
the acquired oil temperature of the gearbox is greater than a preset temperature threshold value;
the obtained gear of the transmission is in a steady state gear, and the shaft where the target clutch is located is an uncontrolled shaft;
all shifting forks on the obtained shaft of the target clutch are in neutral positions;
the acquired transmission input torque value is a positive value and is greater than a preset minimum torque threshold value;
the difference value of the acquired transmission input rotating speed and the target clutch rotating speed is larger than the minimum rotating speed difference threshold value;
and performing half-joint point self-adaption on the acquired steady-state gear.
3. The method of claim 1, wherein the step of calculating the pressure differential between the actual pressure value and the target pressure value during the target clutch fill further comprises:
and when the duration of the pressure difference being greater than or equal to the first pressure threshold is greater than a preset duration threshold, the clutch semi-joint adaptation is exited.
4. The method of claim 1, wherein the step of updating the pressure value at the half-junction point based on the change rate difference of the first average speed difference change rate and the second average speed difference change rate comprises:
calculating a change rate difference value of the first average rotational speed difference change rate and the second average rotational speed difference change rate;
comparing the change rate difference value with a preset first change rate threshold value and a preset second change rate threshold value;
when the change rate difference value is smaller than the first change rate threshold value, increasing the pressure value of the half-combination point according to a preset step length;
when the change rate difference is larger than the second change rate threshold, reducing the pressure value of the half-combination point according to the step length;
and when the change rate difference value is greater than or equal to the first change rate threshold value and less than or equal to the second change rate threshold value, keeping the pressure value of the half-combination point unchanged.
5. The method of claim 4,
the first change rate threshold is the minimum torque value when the target clutch starts to transmit torque/the rotational inertia of the shaft of the target clutch;
the second rate of change threshold is the maximum torque value at which the target clutch begins to transmit torque/the moment of inertia of the shaft on which the target clutch is located.
6. The method of claim 1, wherein the step of calculating a second average rate of change of the speed difference between the transmission input speed and the target clutch speed is followed by the step of:
and controlling the target clutch to discharge oil so as to restore the target clutch to the state before oil charging.
7. The method of claim 6, wherein controlling the counter to perform a second count operation in accordance with the time period to obtain a second count value, the step of calculating a second average rate of change of the speed difference between the transmission input speed and the target clutch speed comprising:
calculating a second speed difference between the transmission input speed and the target clutch speed;
and when the second rotating speed difference is smaller than a preset rotating speed difference threshold value and the second counting value is smaller than or equal to a preset second counting threshold value, skipping to the step of controlling oil discharge of the target clutch.
8. A clutch semi-coupling point adaptive device, comprising:
a condition judgment unit for judging whether a semi-joint adaptive enabling condition of the clutch is satisfied;
the first calculating unit is used for controlling the counter to execute a first counting operation according to a preset time period to obtain a first counting value and calculating a first average rotating speed difference change rate of the input rotating speed of the transmission and the rotating speed of the target clutch when the semi-joint adaptive enabling condition is met;
the oil filling control unit is used for controlling the oil filling of the target clutch by taking the pressure value of the current half-combination point as a target pressure value and calculating the pressure difference between the actual pressure value and the target pressure value in the oil filling process of the target clutch when the first counting value is greater than a preset first counting threshold value;
the second calculating unit is used for controlling the counter to execute second counting operation according to the time period when the pressure difference is smaller than a preset first pressure threshold value to obtain a second counting value, and calculating a second average rotating speed difference change rate of the input rotating speed of the transmission and the rotating speed of the target clutch; and
and the pressure value updating unit is used for updating the pressure value of the half-joint point according to the change rate difference value of the first average rotating speed difference change rate and the second average rotating speed difference change rate when the second counting value is larger than a preset second counting threshold value.
9. A control device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1 to 7 are implemented when the computer program is executed by the processor.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
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| CN114215861A (en) * | 2021-12-13 | 2022-03-22 | 义乌吉利自动变速器有限公司 | Intelligent clutch adjustment method, device, equipment and storage medium |
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| CN114215861B (en) * | 2021-12-13 | 2023-09-22 | 义乌吉利自动变速器有限公司 | Intelligent clutch adjusting method, device, equipment and storage medium |
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