WO2019129058A1 - 流量阀控制方法、装置和存储介质 - Google Patents

流量阀控制方法、装置和存储介质 Download PDF

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Publication number
WO2019129058A1
WO2019129058A1 PCT/CN2018/123897 CN2018123897W WO2019129058A1 WO 2019129058 A1 WO2019129058 A1 WO 2019129058A1 CN 2018123897 W CN2018123897 W CN 2018123897W WO 2019129058 A1 WO2019129058 A1 WO 2019129058A1
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WIPO (PCT)
Prior art keywords
flow
flow valve
current
current value
value
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PCT/CN2018/123897
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English (en)
French (fr)
Inventor
张丙玉
魏立林
栗欧阳
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长城汽车股份有限公司
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Application filed by 长城汽车股份有限公司 filed Critical 长城汽车股份有限公司
Priority to EP18895431.7A priority Critical patent/EP3734121A4/en
Priority to AU2018393427A priority patent/AU2018393427B2/en
Priority to US16/762,669 priority patent/US11125322B2/en
Priority to RU2020122592A priority patent/RU2740659C1/ru
Publication of WO2019129058A1 publication Critical patent/WO2019129058A1/zh

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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
    • F16H61/0202—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 electric
    • F16H61/0204—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 electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
    • 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
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/002—Calibrating
    • 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
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F15B21/087—Control strategy, e.g. with block diagram
    • 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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
    • 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
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/365—Directional control combined with flow control and pressure control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6654—Flow rate control
    • 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
    • F16H2061/0065—Modifying or tuning an existing transmission control for racing, e.g. adaptation of valves for very fast shifting
    • 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
    • F16H2061/0068—Method or means for testing of transmission controls or parts thereof
    • 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
    • F16H2061/0075—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 a particular control method
    • F16H2061/0087—Adaptive control, e.g. the control parameters adapted by learning
    • 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
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H2061/283—Adjustment or calibration of actuator positions, e.g. neutral position

Definitions

  • the invention relates to the field of flow valves, and in particular to a flow valve control method, device and storage medium.
  • the hydraulic valve is used to control the flow and pressure to push the fork to realize the shifting, wherein the flow valve controls the flow, the pressure valve controls the pressure, and the different hydraulic valves control differently.
  • Shift forks are used to shift gears.
  • the flow control is mainly based on a fixed flow-current curve, that is, according to the demand of the shift fork for the flow, the corresponding flow valve current value is obtained from the flow-current curve to control the flow valve opening.
  • the existing flow control strategy based on the flow-current curve of the fixed flow valve may not be able to adapt to hardware changes, and may cause the following problems:
  • the hydraulic oil filling effect is deteriorated. If the hydraulic oil flow rate cannot meet the actual requirements, the hydraulic response time will be lowered, resulting in failure of the fork shifting and failing to meet the functional requirements;
  • the present invention is directed to a flow valve control method to at least partially solve the above technical problems.
  • a flow valve control method comprising:
  • Self-learning of the flow valve median current value is performed from an initial median current value of the flow valve, wherein each self-learning process includes: controlling a current output to the flow valve to cause the flow valve to sequentially undergo The following process: the first time there is flow, the output flow causes the shifting mechanism to return, the flow again passes, and the output flow again causes the shifting mechanism to return to the position; the current value when the flow rate is passed twice in the flow valve is recorded. a maximum median current value; and obtaining a deviation value between the maximum median current value and the initial median current value;
  • the initial median current value in the first self-learning process is the factory median current value
  • the initial median current value in the next self-learning process is the flow rate corrected in the previous self-learning process - The corresponding flow valve median current value in the current curve.
  • controlling the current outputted to the flow valve comprises: increasing the current output to the flow valve at a first preset speed until a flow rate is passed for the first time, and recording a current value when the first flow has passed a maximum median current value; reducing a current output to the flow valve at a second preset speed until a flow rate of the flow valve output causes the shifting mechanism to return; and lowering to the flow valve at a third preset speed The output current until the flow rate passes again, recording the current value when the flow rate is again passed, and the current value output to the flow valve is increased at the fourth preset speed until the flow rate The flow output from the valve again causes the shifting mechanism to return.
  • controlling the current outputted to the flow valve comprises: reducing the current output to the flow valve at a first preset speed until a flow rate is passed for the first time, and recording a current value when the first flow has passed a maximum median current value; increasing a current output to the flow valve at a second preset speed until a flow rate of the flow valve output causes the shifting mechanism to return; and increasing to the flow valve at a third preset speed The output current until the flow rate passes again, recording the current value when the flow rate is again passed, and the current value of the high side maximum current is decreased; and the current output to the flow valve is decreased at the fourth preset speed until the flow rate The flow output from the valve again causes the shifting mechanism to return.
  • the flow valve control method further includes ending the self-learning process when any one of the following conditions is not satisfied: the vehicle driving condition remains stable during the self-learning process; The initial median value does not exceed the third preset position threshold; the time during which the current of the flow valve increases or decreases does not exceed the first predetermined time threshold before the flow rate passes in the flow valve; the shifting mechanism The time of the return position does not exceed the second preset time threshold; and the deviation between the high side maximum current median value and the low side maximum current value cannot exceed the preset current deviation threshold.
  • the flow valve control method of the present invention has the following advantages: the flow valve control method of the embodiment of the present invention continuously corrects the flow current value of the flow valve through a self-learning control strategy to obtain an accurate current-flow curve. It avoids the change of the median current value caused by the hardware change, has high applicability, and can achieve the purpose of accurately controlling the flow valve, thereby ensuring the effect of the hydraulic oil-filled card and the smoothness of the shifting and the shifting time, and is beneficial to the transmission. The life of the whole box.
  • Another object of the present invention is to provide a flow valve control device that at least partially solves the above technical problems.
  • a flow valve control device comprising:
  • a self-learning module configured to perform self-learning of a flow valve median current value from an initial median current value of the flow valve, wherein each self-learning process includes: controlling a current output to the flow valve to enable The flow valve sequentially undergoes the following processes: the first time there is flow, the output flow causes the shifting mechanism to return, the flow again passes, and the output flow again causes the shifting mechanism to return; the flow rate is recorded twice in the flow valve
  • the current value at the time of passage is a maximum median current value; and obtaining a deviation value between the maximum median current value and the initial median current value;
  • a correction module configured to correct a flow-current curve of the flow valve based on the deviation value
  • the initial median current value in the first self-learning process is the factory median current value
  • the initial median current value in the next self-learning process is the flow rate corrected in the previous self-learning process - The corresponding flow valve median current value in the current curve.
  • controlling, by the self-learning module, the current outputted to the flow valve during the self-learning process comprises: increasing a current output to the flow valve at a first preset speed until a flow rate passes for the first time, recording the The current value when the flow rate passes for the first time is the maximum median current value of the high side; the current output to the flow valve is decreased at the second preset speed until the flow rate of the flow valve output causes the shifting mechanism to return to the position; The three preset speeds reduce the current output to the flow valve until the flow rate passes again, recording the current value when the flow rate is again passed, and the value of the current value of the low side maximum medium current; and increasing to the fourth preset speed The current output by the flow valve until the flow output from the flow valve again causes the shifting mechanism to return.
  • controlling, by the self-learning module, the current outputted to the flow valve during the self-learning process comprises: reducing a current outputted to the flow valve at a first preset speed until a flow rate passes for the first time, recording the The current value when the flow rate passes for the first time is the maximum median current value of the low side; the current output to the flow valve is increased at the second preset speed until the flow rate of the flow valve output causes the shifting mechanism to return to the position; The three preset speeds increase the current output to the flow valve until the flow rate passes again, recording the current value when the flow rate is again passed, and the maximum median current value at the high side; and decreasing to the fourth preset speed The current output by the flow valve until the flow output from the flow valve again causes the shifting mechanism to return.
  • the self-learning module includes a determining sub-module, configured to determine whether the flow rate is passed through the flow valve by: when the difference between the current position value of the shifting mechanism and the initial median value is greater than a first preset position threshold, and when the current position value of the shifting mechanism is greater than a second preset position threshold, determining that there is flow in the flow valve; and/or when the moving speed of the shifting mechanism When it is greater than the preset speed threshold, it is determined that there is flow in the flow valve.
  • a determining sub-module configured to determine whether the flow rate is passed through the flow valve by: when the difference between the current position value of the shifting mechanism and the initial median value is greater than a first preset position threshold, and when the current position value of the shifting mechanism is greater than a second preset position threshold, determining that there is flow in the flow valve; and/or when the moving speed of the shifting mechanism When it is greater than the preset speed threshold, it is determined that there is flow in the flow valve.
  • the flow valve control device further includes a diagnosis module for diagnosing the following conditions in the self-learning process, and ending the self-learning process when any one of the following conditions is not satisfied: the vehicle is traveling The operating condition remains stable during the self-learning; the initial median value of the shifting mechanism does not exceed a third preset position threshold; the flow rate of the flow valve increases or increases before the flow rate passes in the flow valve The reduced time does not exceed the first preset time threshold; the time when the shifting mechanism returns is not more than the second preset time threshold; and the high side maximum current median value and the low side maximum current value The deviation cannot exceed the preset current deviation threshold.
  • the technical solution of the present invention further provides a computer readable storage medium having stored thereon a computer program, the program being implemented by the processor to implement the flow valve control method described above.
  • the flow valve control device and the above-described flow valve control method have the same advantages as those of the prior art, and are not described herein again.
  • FIG. 1 is a schematic view showing a method of a flow valve control method according to an embodiment of the present invention
  • FIG. 2 is a schematic flow chart of a self-learning process according to an embodiment of the present invention.
  • FIG. 3 is a flow chart of an exemplary self-learning process of an embodiment of the present invention.
  • Fig. 4 is a view showing an example of the configuration of a flow rate control device according to an embodiment of the present invention.
  • the inventor of the present application found in the process of implementing the present application that in the scheme of using the flow-current curve for flow valve control, the key point of whether the flow-current curve can be accurate is the critical point of the flow valve neutral current on the curve. That is, the flow valve has a critical point at which the flow rate passes (hereinafter, the current value corresponding to the point is referred to as the median current value on the curve), which affects the hydraulic oil filling effect and the smoothness and shifting time of the shifting mechanism.
  • the main inventive idea of the embodiment of the present invention is to correct the flow-current curve based on the correction of the neutral point of the flow valve in the above flow valve to adapt to the influence of hardware changes on the accuracy of the flow valve control.
  • FIG. 1 is a schematic view showing a method of a flow valve control method according to an embodiment of the present invention.
  • the flow valve control method is applied to a transmission, and the transmission is preferably an automatic transmission in a vehicle, in particular a wet dual clutch automatic transmission. It should be understood, however, that the flow valve control method of the embodiments of the present invention is also applicable to self-learning of other functional flow valves.
  • the flow valve control method may include the following steps:
  • step S100 self-learning of the flow valve median current value is performed from the initial median current value of the flow valve.
  • the transmission oil temperature is within a reasonable range, for example, 20-80 ° C;
  • the shifting mechanism such as a shift fork, requires the shift position sensor signal to be valid, and the shift fork state is in the neutral position (ie, close to 0 mm);
  • the self-learning process can begin when these conditions and shifting mechanism requirements are met.
  • each self-learning process in step S100 may include the following steps:
  • Step S110 controlling the current outputted to the flow valve, so that the flow valve sequentially undergoes the following process: the first time there is flow, the output flow causes the shifting mechanism to return, the flow again passes, and the output flow is changed again.
  • the gear mechanism returns.
  • step S120 the current value when the flow rate is passed twice in the flow valve is recorded as the maximum median current value.
  • Step S130 obtaining a deviation value between the maximum median current value and the initial median current value.
  • the initial median current value in the first self-learning process is the factory median current value
  • the initial median current value in the next self-learning process is the flow rate corrected in the previous self-learning process - The corresponding flow valve median current value in the current curve.
  • the factory neutral current value the flow valve is in the absolute neutral position, no flow passes, and the shifting mechanism is at the neutral position.
  • the current flow valve is subjected to a current of "the first flow has passed, the output flow has caused the shifting mechanism to return, the flow has passed again, and the output flow has again caused the shifting mechanism to return".
  • the control scheme can include the following steps performed in sequence:
  • step S111a the current output to the flow valve is increased at the first preset speed until the flow rate passes for the first time, and the current value when the first flow rate passes is recorded as the high-side maximum median current value.
  • Step S112a reducing the current output to the flow valve at a second preset speed until the flow rate output by the flow valve causes the shifting mechanism to return.
  • step S113a the current output to the flow valve is decreased at the third preset speed until the flow rate passes again, and the current value when the flow rate is again passed is recorded as the low-side maximum median current value.
  • Step S114a increasing the current output to the flow valve at a fourth preset speed until the flow rate output by the flow valve again causes the shifting mechanism to return.
  • the first preset speed, the second preset speed, the third preset speed, and the fourth preset speed may be set according to a control requirement.
  • the embodiment of the present invention proposes two methods for determining whether there is flow in the flow valve, as follows:
  • the following is an example to illustrate the self-learning process.
  • the different data involved in this example can be understood for each of the preset values described above (eg, the first preset speed).
  • FIG. 3 is a flow chart of an exemplary self-learning process in accordance with an embodiment of the present invention in which a shift fork is used as a shifting mechanism.
  • the example self-learning process mainly includes the following steps:
  • step S301 when the vehicle is in the normal running state, it is determined whether the requirements of each working condition are satisfied, and if not, the self-learning is ended; otherwise, step S302 is performed.
  • the requirements of each working condition also include the requirements for the fork.
  • step S302 the pressure valve is opened, the flow valve current is the initial neutral current value, and the flow valve is closed.
  • the pressure valve current can be first set to open the pressure valve, thereby establishing an oil pressure of at least 8 bar before the flow valve, the oil pressure does not fluctuate due to the fluctuation of the main oil pressure, and can be smoothly smoothed by the electromagnetic valve Pushing the movement of the fork helps to ensure smooth shifting.
  • the initial median current value at this time may be the factory neutral current value, at which time the flow valve is in the absolute neutral position, no flow is passed, the fork is in the neutral position, and the position of the fork in this state can be recorded.
  • the initial value of the initial fork may be the factory neutral current value, at which time the flow valve is in the absolute neutral position, no flow is passed, the fork is in the neutral position, and the position of the fork in this state can be recorded.
  • step S303 the current output to the flow valve is slowly increased.
  • step S304 it is determined whether the flow valve has flow rate. If not, the self-learning failure is recorded, and the process returns to step S301, otherwise step S305 is performed.
  • step S305 the flow valve current value at this time is recorded as the maximum median current value at the high side.
  • the current of the flow valve can be increased at a speed of 0.5 mA/10 ms until a flow rate is passed. If the shift fork is out of the neutral position, the flow valve current value at this time is considered to be a high side. Maximum median current value.
  • Step S306 reducing the current output to the flow valve to return the fork.
  • the current value can be lowered at a speed of 1 mA/10 ms to return the shift fork to the neutral position within a prescribed time.
  • step S307 the current output to the flow valve is slowly lowered.
  • step S308 it is judged whether the flow valve has flow rate, if not, the self-learning failure is recorded, and the process returns to step S301, otherwise step S309 is performed.
  • step S309 the flow valve current value at this time is recorded as the low-side maximum median current value.
  • step S307 to step S309 when the shift fork returns to the neutral position again, the flow valve current can be reduced at a speed of 0.5 mA/10 ms until a flow rate passes, and if the shift fork is out of the neutral position, it is considered that The flow valve current value is the low side maximum median current value.
  • step S310 the current output to the flow valve is increased to return the fork.
  • the current value is increased at a speed of 1 mA/10 ms to return the fork to the neutral position within a prescribed time.
  • Step S311 determining whether the difference between the maximum median current value of the high side and the maximum median current value of the low side exceeds the limit value, and if so, ends the self-learning, otherwise there is a high-side maximum median current value and a low-side maximum median current value. , complete a self-learning process.
  • the above two conditions satisfy one of the conditions that the flow is considered to pass, and the current value at this time is the corresponding high-side maximum median current value or the low-side maximum median current value, and in the example, can be correspondingly recorded as a flow valve.
  • the current value of the current-current curve is 0.1 L/min.
  • the end of the self-learning process is mentioned in steps S301 to S311 in the above example, and in a more preferred embodiment, the self-learning may be ended when any one of the following conditions is not satisfied. process:
  • the third preset position threshold may be, for example, 1 mm (millimeter).
  • the first preset time threshold may be, for example, 4 s (seconds).
  • the second preset time threshold may be, for example, 1.2 s.
  • the preset current deviation threshold may be, for example, 200 mA (milliampere).
  • the self-learning process can be controlled in an ideal environment, and the result value with a large error can be avoided.
  • the flow valve is sequentially subjected to "the first flow has passed, the output flow rate causes the shifting mechanism to return, the flow has passed again, and the output flow again causes the shifting mechanism to return to position".
  • the current control scheme can also obtain the low-side maximum median current value first, and then obtain the high-side maximum median current value, that is, the following steps can be performed in sequence:
  • Step S111b reducing the current output to the flow valve at the first preset speed until the flow rate passes for the first time, and recording the current value when the first flow has passed is the low-side maximum median current value.
  • Step S112b increasing the current output to the flow valve at a second preset speed until the flow rate output by the flow valve causes the shifting mechanism to return.
  • step S113b the current output to the flow valve is increased at the third preset speed until the flow rate passes again, and the current value when the flow rate is again passed is recorded as the high-side maximum medium current value.
  • Step S114b reducing the current output to the flow valve at a fourth preset speed until the flow rate output by the flow valve again causes the shifting mechanism to return.
  • step S111b-step S114b reference may be made to the above description about step S111a-step S114a, and details are not described herein again.
  • step S100 by continuously performing self-learning, it is possible to adapt to the hardware variation of the transmission to obtain the deviation value generated by the flow valve median current value.
  • Step S200 correcting the flow-current curve of the flow valve based on the deviation value obtained from the self-learning process.
  • the correction factor may be calibrated according to a driving cycle mode of the vehicle or the like.
  • the flow valve can be controlled based on the corrected flow-current curve, and the current corresponding to the target flow is outputted to ensure the hydraulic oil filling effect and smooth shifting. Sex and shift time.
  • the flow valve control method of the embodiment of the present invention continuously corrects the neutral current value of the flow valve through a self-learning control strategy to obtain an accurate current-flow curve, thereby avoiding a change in the median current value caused by hardware changes, and is applicable.
  • High performance can achieve the purpose of accurately controlling the flow valve, thus ensuring the effect of the hydraulic oil-filled card and the smoothness of the shifting and shifting time, and is beneficial to improve the life of the entire transmission of the transmission.
  • an embodiment of the present invention also provides a flow valve control device.
  • Fig. 4 is a view showing an example of the configuration of a flow rate control device according to an embodiment of the present invention. As shown in FIG. 4, the flow valve control device may include:
  • the self-learning module 410 is configured to perform self-learning of the flow valve median current value from an initial median current value of the flow valve.
  • Each of the self-learning processes includes: controlling the current output to the flow valve such that the flow valve sequentially undergoes the following processes: the first time there is flow, the output flow causes the shifting mechanism to return, the flow again passes, and the output The flow rate again causes the shifting mechanism to return to the position; the current value when the flow rate is passed twice in the flow valve is recorded as the maximum median current value; and the maximum median current value and the initial median current value are obtained. Deviation.
  • the correction module 420 is configured to correct the flow-current curve of the flow valve based on the deviation value.
  • the initial median current value in the first self-learning process is the factory median current value
  • the initial median current value in the next self-learning process is the flow rate corrected in the previous self-learning process - The corresponding flow valve median current value in the current curve.
  • the self-learning module 410 controls the current outputted to the flow valve during the self-learning process, including: increasing the current output to the flow valve at a first preset speed until For the first time, there is a flow rate, and the current value when the first flow has passed is recorded as the maximum median current value at the high side; the current output to the flow valve is decreased at the second preset speed until the flow rate of the flow valve is changed. Returning the gear mechanism; reducing the current output to the flow valve at a third preset speed until the flow rate passes again, recording the current value when the flow rate is again passed, and the value of the low-side maximum median current; and The preset speed increases the current output to the flow valve until the flow output by the flow valve again causes the shifting mechanism to return.
  • the controlling the output current to the flow valve during the self-learning process by the self-learning module 410 includes: reducing a current output to the flow valve at a first preset speed, Until the flow rate passes for the first time, the current value when the first flow has passed is recorded as the low-side maximum median current value; the current output to the flow valve is increased at the second preset speed until the flow rate of the flow valve output The shifting mechanism returns to the position; the current output to the flow valve is increased at the third preset speed until the flow rate passes again, and the current value when the flow rate is again passed is recorded as the maximum median current value of the high side; The four preset speeds reduce the current output to the flow valve until the flow output by the flow valve again causes the shifting mechanism to return.
  • the self-learning module 410 may include a judging sub-module 411 for judging whether there is flow in the flow valve by: when the current position value of the shifting mechanism is initial When the difference between the bit values is greater than the first preset position threshold, and the current position value of the shifting mechanism is greater than the second preset position threshold, determining that there is flow in the flow valve; and/or when the When the moving speed of the blocking mechanism is greater than the preset speed threshold, it is determined that there is flow in the flow valve.
  • the flow valve control device of the transmission may further include a diagnosis module 430 for diagnosing the following conditions in the self-learning process, and ending when any one of the following conditions is not satisfied
  • the self-learning process the driving condition of the vehicle remains stable during the self-learning process; the initial median value of the shifting mechanism does not exceed the third preset position threshold; before the flow rate passes through the flow valve The time when the current of the flow valve increases or decreases does not exceed the first preset time threshold; the time when the shifting mechanism returns is not exceeded the second preset time threshold; and the high side maximum current median value The deviation of the low side maximum current value cannot exceed the preset current deviation threshold.
  • the correcting module 420 for modifying the flow-current curve of the flow valve based on the deviation value, may include: multiplying the deviation value by a calibration correction factor, and combining the obtained product with the initial The neutral currents are summed to obtain a sum value, and the median current value on the flow-current curve of the flow valve is corrected to the sum value.
  • the embodiment of the invention further provides a transmission control device, and the transmission control device is provided with the flow valve control device of the transmission described in the above embodiments.
  • the transmission control device may be a TCU (Transmission Control Unit), so that the flow valve control strategy of the embodiment of the present invention can be directly implemented by the TCU, enriching the control function of the TCU, and facilitating the improvement of the TCU.
  • TCU Transmission Control Unit
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

一种流量阀控制方法、装置及存储介质。流量阀控制方法包括：从流量阀的初始中位电流值开始，进行流量阀中位电流值的自学习（S100）；以及基于自学习所得的偏差值修正流量阀的流量-电流曲线（S200）。其中每一次自学习过程包括：控制向流量阀输出的电流，以使流量阀依次经历以下过程：首次有流量通过、输出的流量使得换挡机构回位、再次有流量通过、输出的流量再次使得换挡机构回位（S110）；记录流量阀中两次有流量通过时的电流值为最大中位电流值（S120）；以及获取最大中位电流值与初始中位电流值的偏差值（S130）。通过自学习控制策略，不断修正流量阀中位电流值以得到精确的电流-流量曲线，能达到精确控制流量阀的目的。

Description

流量阀控制方法、装置和存储介质 技术领域
本发明涉及流量阀领域，特别涉及一种流量阀控制方法、装置和存储介质。
背景技术
现有技术的湿式双离合器变速器换挡拨叉工作时，是通过液压阀控制流量与压力推动拨叉来实现换挡的，其中流量阀控制流量，压力阀控制压力，不同的液压阀控制不同的拨叉实现换挡。其中，流量控制主要是基于固定的流量-电流曲线来实现的，即根据换挡拨叉对流量的需求，从流量-电流曲线中获取对应的流量阀电流值，以控制流量阀开度。
但是，由于液压阀、拨叉活塞缸、拨叉硬件等具有的装配及制造误差以及液压管路长短不同、管路泄油量不同、耐久磨损等因素，会对流量阀控制的精度产生影响，从而造成固定的流量阀流量-电流曲线满足不了对流量阀的精确控制需求。
更为具体地，现有基于固定流量阀流量-电流曲线的流量控制策略因不能适应硬件变化，可能会产生以下问题：
第一，导致液压充油效果变差，如果液压油流量不能满足实际要求，会降低液压响应时间，导致拨叉换挡失败，不能满足功能性要求；
第二，降低了流量控制策略的适用性；
第三，经过耐久试验后，液压阀流量-电流曲线会发生变化，降低整箱使用寿命；
第四，加大了标定工作的难度，浪费资源。
因此，需要提出针对变速器的新的流量控制策略，以避免硬件变化对流量控制精度造成的影响。
发明内容
有鉴于此，本发明旨在提出一种流量阀控制方法，以至少部分地解决上述技术问题。
为达到上述目的，本发明的技术方案是这样实现的：
一种流量阀控制方法，所述流量阀控制方法包括：
从所述流量阀的初始中位电流值开始，进行流量阀中位电流值的自学习，其中每 一次自学习过程包括：控制向所述流量阀输出的电流，以使所述流量阀依次经历以下过程：首次有流量通过、输出的流量使得换挡机构回位、再次有流量通过、输出的流量再次使得换挡机构回位；记录所述流量阀中两次有流量通过时的电流值为最大中位电流值；以及获取所述最大中位电流值与所述初始中位电流值的偏差值；
基于所述偏差值修正所述流量阀的流量-电流曲线；
其中，第一次自学习过程中的初始中位电流值为出厂中位电流值，且下一次自学习过程中的初始中位电流值为在前一次自学习过程中修正得到的所述流量-电流曲线中对应的流量阀中位电流值。
进一步的，所述控制向所述流量阀输出的电流包括：以第一预设速度增加向所述流量阀输出的电流，直到首次有流量通过，记录该首次有流量通过时的电流值为高边最大中位电流值；以第二预设速度降低向所述流量阀输出的电流，直到所述流量阀输出的流量使得换挡机构回位；以第三预设速度降低向所述流量阀输出的电流，直到再次有流量通过，记录该再次有流量通过时的电流值为低边最大中位电流值；以及以第四预设速度增加向所述流量阀输出的电流，直到所述流量阀输出的流量再次使得换挡机构回位。
进一步的，所述控制向所述流量阀输出的电流包括：以第一预设速度降低向所述流量阀输出的电流，直到首次有流量通过，记录该首次有流量通过时的电流值为低边最大中位电流值；以第二预设速度增加向所述流量阀输出的电流，直到所述流量阀输出的流量使得换挡机构回位；以第三预设速度增加向所述流量阀输出的电流，直到再次有流量通过，记录该再次有流量通过时的电流值为高边最大中位电流值；以及以第四预设速度降低向所述流量阀输出的电流，直到所述流量阀输出的流量再次使得换挡机构回位。
进一步的，通过以下方法判断所述流量阀中是否有流量通过：当所述换档机构的当前位置值与初始中位值之差大于第一预设位置阈值，且所述换档机构的所述当前位置值大于第二预设位置阈值时，所述流量阀中有流量通过；和/或当所述换挡机构的移动速度大于预设速度阈值时，所述流量阀中有流量通过。
进一步的，所述流量阀控制方法还包括在以下条件中的任意一者不满足时，结束所述自学习过程：车辆行驶工况在所述自学习过程中保持稳定；所述换挡机构的初始中位值不超过第三预设位置阈值；在所述流量阀中有流量通过之前，所述流量阀的电流增加或减小的时间不超过第一预设时间阈值；所述换挡机构回位的时间不超过第二预设时间阈值；以及所述高边最大电流中位值和所述低边最大电流值的偏差不能超过预设的电流偏差阈值。
相对于现有技术，本发明所述的流量阀控制方法具有以下优势：本发明实施例的流量阀控制方法通过自学习控制策略，不断修正流量阀中位电流值以得到精确的电流-流量曲线，避免了硬件变化导致的中位电流值变化，适用性高，能达到精确控制流量阀的目的，从而可保证液压充油卡效果和换挡的平顺性和换挡时间，且有利于提高变速器的整箱使用寿命。
本发明的另一目的在于提出一种流量阀控制装置，以至少部分地解决上述技术问题。
为达到上述目的，本发明的技术方案是这样实现的：
一种流量阀控制装置，所述流量阀控制装置包括：
自学习模块，用于从所述流量阀的初始中位电流值开始，进行流量阀中位电流值的自学习，其中每一次自学习过程包括：控制向所述流量阀输出的电流，以使所述流量阀依次经历以下过程：首次有流量通过、输出的流量使得换挡机构回位、再次有流量通过、输出的流量再次使得换挡机构回位；记录所述流量阀中两次有流量通过时的电流值为最大中位电流值；以及获取所述最大中位电流值与所述初始中位电流值的偏差值；
修正模块，用于基于所述偏差值修正所述流量阀的流量-电流曲线；
其中，第一次自学习过程中的初始中位电流值为出厂中位电流值，且下一次自学习过程中的初始中位电流值为在前一次自学习过程中修正得到的所述流量-电流曲线中对应的流量阀中位电流值。
进一步的，所述自学习模块在所述自学习过程中控制向所述流量阀输出的电流包括：以第一预设速度增加向所述流量阀输出的电流，直到首次有流量通过，记录该首次有流量通过时的电流值为高边最大中位电流值；以第二预设速度降低向所述流量阀输出的电流，直到所述流量阀输出的流量使得换挡机构回位；以第三预设速度降低向所述流量阀输出的电流，直到再次有流量通过，记录该再次有流量通过时的电流值为低边最大中位电流值；以及以第四预设速度增加向所述流量阀输出的电流，直到所述流量阀输出的流量再次使得换挡机构回位。
进一步的，所述自学习模块在所述自学习过程中控制向所述流量阀输出的电流包括：以第一预设速度降低向所述流量阀输出的电流，直到首次有流量通过，记录该首次有流量通过时的电流值为低边最大中位电流值；以第二预设速度增加向所述流量阀输出的电流，直到所述流量阀输出的流量使得换挡机构回位；以第三预设速度增加向所述流量阀输出的电流，直到再次有流量通过，记录该再次有流量通过时的电流值为高边最大 中位电流值；以及以第四预设速度降低向所述流量阀输出的电流，直到所述流量阀输出的流量再次使得换挡机构回位。
进一步的，所述自学习模块中包括有判断子模块，其用于通过以下方法判断所述流量阀中是否有流量通过：当所述换档机构的当前位置值与初始中位值之差大于第一预设位置阈值，且所述换档机构的所述当前位置值大于第二预设位置阈值时，判断所述流量阀中有流量通过；和/或当所述换挡机构的移动速度大于预设速度阈值时，判断所述流量阀中有流量通过。
进一步的，所述流量阀控制装置还包括诊断模块，用于诊断在所述自学习过程中的以下条件，并在以下条件中的任意一者不满足时，结束所述自学习过程：车辆行驶工况在所述自学习过程中保持稳定；所述换挡机构的初始中位值不超过第三预设位置阈值；在所述流量阀中有流量通过之前，所述流量阀的电流增加或减小的时间不超过第一预设时间阈值；所述换挡机构回位的时间不超过第二预设时间阈值；以及所述高边最大电流中位值和所述低边最大电流值的偏差不能超过预设的电流偏差阈值。
本发明技术方案还提供一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现上述的流量阀控制方法。
所述流量阀控制装置与上述流量阀控制方法相对于现有技术所具有的优势相同，在此不再赘述。
本发明的其它特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
构成本发明的一部分的附图用来提供对本发明的进一步理解，本发明的示意性实施方式及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是本发明实施例的一种流量阀控制方法的方法示意图；
图2是本发明实施例的自学习过程的流程示意图；
图3是本发明实施例的示例自学习过程的流程图；以及
图4是本发明实施例的流量控制装置的结构示例图。
附图标记说明：
410、自学习模块    420、修正模块
411、判断子模块    430、诊断模块
具体实施方式
需要说明的是，在不冲突的情况下，本发明中的实施方式及实施方式中的特征可以相互组合。
下面将参考附图并结合实施方式来详细说明本发明。
本申请发明人在实现本申请的过程中发现：在利用流量-电流曲线进行流量阀控制的方案中，用流量-电流曲线是否能够精确的关键点在于曲线上的流量阀中位电流临界点，即流量阀有流量通过的临界点(以下将该点对应的电流值称为曲线上的中位电流值)，此点影响液压充油效果以及换挡机构的平顺性和换挡时间。
因此，本发明实施例的主要发明思路是基于对上述流量阀中位电流临界点的修正来修正流量-电流曲线，以适应硬件变化对流量阀控制精确性的影响。
图1是本发明实施例的一种流量阀控制方法的方法示意图。本发明实施例中，该流量阀控制方法应用于变速器，且所述变速器优选是车辆中的自动变速器，特别是湿式双离合自动变速器。但应当理解的是，本发明实施例的流量阀控制方法也应用于其他功能性流量阀的自学习中。
如图1所示，所述流量阀控制方法可以包括以下步骤：
步骤S100，从所述流量阀的初始中位电流值开始，进行流量阀中位电流值的自学习。
其中，对于湿式双离合自动变速器，为保证自学习效果，可进行以下几点的工况要求和换挡机构要求：
1)路况良好，车辆匀速直线行驶；
2)仅一个挡位在挡，另一输入轴上无挡位在挡，为空转状态，并且此被动离合器拖曳扭矩不能过大；
3)变速器油温在合理的范围内，例如20-80℃；
4)空挡轴上离合器压力接近0bar；
5)所述换挡机构，例如换挡拨叉，要求拨叉位置传感器信号有效，换且挡拨叉状态均在空挡位置(即接近0mm)；
6)此次驾驶循环不能出现换挡失败的记录。
在这些工况要求和换挡机构要求满足的情况下，可以开始自学习过程。
图2是本发明实施例的自学习过程的流程示意图。如图2所示，所述步骤S100中 的每一次自学习过程可以包括以下步骤：
步骤S110，控制向所述流量阀输出的电流，以使所述流量阀依次经历以下过程：首次有流量通过、输出的流量使得换挡机构回位、再次有流量通过、输出的流量再次使得换挡机构回位。
步骤S120，记录所述流量阀中两次有流量通过时的电流值为最大中位电流值。
步骤S130，获取所述最大中位电流值与所述初始中位电流值的偏差值。
其中，第一次自学习过程中的初始中位电流值为出厂中位电流值，且下一次自学习过程中的初始中位电流值为在前一次自学习过程中修正得到的所述流量-电流曲线中对应的流量阀中位电流值。其中，出厂中位电流值时，流量阀处于绝对中位，无流量通过，换挡机构在中位位置。
在一个优选的实施例中，对于使所述流量阀依次经历“首次有流量通过、输出的流量使得换挡机构回位、再次有流量通过、输出的流量再次使得换挡机构回位”的电流控制方案可以包括依次执行的以下步骤：
步骤S111a，以第一预设速度增加向所述流量阀输出的电流，直到首次有流量通过，记录该首次有流量通过时的电流值为高边最大中位电流值。
步骤S112a，以第二预设速度降低向所述流量阀输出的电流，直到所述流量阀输出的流量使得换挡机构回位。
步骤S113a，以第三预设速度降低向所述流量阀输出的电流，直到再次有流量通过，记录该再次有流量通过时的电流值为低边最大中位电流值。
步骤S114a，以第四预设速度增加向所述流量阀输出的电流，直到所述流量阀输出的流量再次使得换挡机构回位。
其中，所述第一预设速度、第二预设速度、第三预设速度及第四预设速度可根据控制要求来进行设置。
进一步地，对于步骤S111和步骤S113都需要判断流量阀是否有流量通过。对此，本发明实施例提出两种方法判断所述流量阀中是否有流量通过的方法，具体如下：
1)当所述换档机构的当前位置值与初始中位值之差大于第一预设位置阈值，且所述换档机构的所述当前位置值大于第二预设位置阈值时，所述流量阀中有流量通过。
2)当所述换挡机构的移动速度大于预设速度阈值时，所述流量阀中有流量通过。
在这两种方法的任意一者可以实现时，即可认为流量阀中有流量通过，可记录此时对应的低边最大中位电流值或高边最大中位电流值以用作修正流量-电流曲线中对应 的中位电流值。
下面通过一个示例来说明自学习过程。该示例中涉及的不同数据可根据方案理解对上述的各个预设值(例如第一预设速度)。
图3是本发明实施例的示例自学习过程的流程图，该示例中以拨叉作为换挡机构。如图3所示，该示例自学习过程主要包括以下步骤：
步骤S301，在车辆处于正常行驶状态时，判断各工况要求是否满足，若不满足则结束自学习，否则执行步骤S302。
其中，各工况要求也包括了对拨叉的要求。
步骤S302，压力阀打开，流量阀电流为初始中位电流值，流量阀关闭。
其中，可首先设置压力阀电流使压力阀打开，从而在流量阀前建立至少8bar的油压，该油压的大小不会因主油压的波动而波动，可以在电磁阀的作用下平顺地推动拨叉的移动，有利于保证换挡平顺性。
其中，此时的初始中位电流值可以为出厂中位电流值，此时流量阀处于绝对中位，无流量通过，拨叉在中位位置，可记录下此状态下的拨叉位置，计为初始拨叉中位值。
步骤S303，缓慢增加向流量阀输出的电流。
步骤S304，判断流量阀是否有流量通过，若没有则记录自学习失败，并返回至步骤S301，否则执行步骤S305。
步骤S305，记录此时的流量阀电流值为高边最大中位电流值。
具体地，对于步骤S303至步骤S305，可以以0.5mA/10ms的速度增加流量阀的电流，直到有流量通过，如果换挡拨叉脱离中位位置，认为此时的流量阀电流值为高边最大中位电流值。
步骤S306，降低向流量阀输出的电流，使拨叉回位。
具体地，为了使拨叉快速回到中位，进行低边中位电流值的学习，可以以1mA/10ms的速度降低电流值以在规定的时间内使拨叉重新回到中位位置。
步骤S307，缓慢降低向流量阀输出的电流。
步骤S308，判断流量阀是否有流量通过，若没有则记录自学习失败，并返回至步骤S301，否则执行步骤S309。
步骤S309，记录此时的流量阀电流值为低边最大中位电流值。
具体地，对于步骤S307至步骤S309，在拨叉再次回到中位时，可以以0.5mA/10ms的速度降低流量阀电流，直到有流量通过，如果换挡叉脱离中位位置，认为此时的流量 阀电流值为低边最大中位电流值。
步骤S310，增加向流量阀输出的电流，使拨叉回位。
其中，为了使拨叉快速回到中位，以1mA/10ms的速度增加电流值以在规定的时间内使拨叉重新回到中位位置。
步骤S311，判断高边最大中位电流值和低边最大中位电流值的差值是否超过限值，若是则结束自学习，否则存在高边最大中位电流值和低边最大中位电流值，完成一次自学习过程。
其中，对于步骤S301-步骤S311中涉及的关于流量阀是否有流量通过的判断，结合上文关于两种判断方法的描述，可基于以下示例条件进行
1)实际拨叉位置值-初始拨叉中位值>0.6mm，并且实际拨叉位置值>0.8mm。
2)实际拨叉移动速度>12mm/s。
以上两个条件满足其中一个条件即认为有流量通过，记此时的电流值为对应的高边最大中位电流值或低边最大中位电流值，且在示例中，可对应记为流量阀的流量-电流曲线中0.1L/min的电流值。
进一步地，上述示例中步骤S301-步骤S311中提及了关于自学习过程的结束，在更为优选的实施例中，可在在以下条件中的任意一者不满足时，结束所述自学习过程：
1)车辆行驶工况在所述自学习过程中保持稳定。
2)所述换挡机构的初始中位值不超过第三预设位置阈值。
其中，在该示例中，第三预设位置阈值可以例如是1mm(毫米)。
3)在所述流量阀中有流量通过之前，所述流量阀的电流增加或减小的时间不超过第一预设时间阈值。
其中，在该示例中，所述第一预设时间阈值可以例如是4s(秒)。
4)所述换挡机构回位的时间不超过第二预设时间阈值。
其中，在该示例中，所述第二预设时间阈值可以例如是1.2s。
5)所述高边最大电流中位值和所述低边最大电流值的偏差不能超过预设的电流偏差阈值。
其中，在该示例中，所述预设的电流偏差阈值可以例如是200mA(毫安)。
如此，通过上述条件的设置，可控制自学习过程在理想环境下进行，避免学习到误差较大的结果值。
在另一个优选的实施例中，对于使所述流量阀依次经历“首次有流量通过、输出 的流量使得换挡机构回位、再次有流量通过、输出的流量再次使得换挡机构回位”的电流控制方案也可以先获取低边最大中位电流值，再获取高边最大中位电流值，即可以依次执行的以下步骤：
步骤S111b，以第一预设速度降低向所述流量阀输出的电流，直到首次有流量通过，记录该首次有流量通过时的电流值为低边最大中位电流值。
步骤S112b，以第二预设速度增加向所述流量阀输出的电流，直到所述流量阀输出的流量使得换挡机构回位。
步骤S113b，以第三预设速度增加向所述流量阀输出的电流，直到再次有流量通过，记录该再次有流量通过时的电流值为高边最大中位电流值。
步骤S114b，以第四预设速度降低向所述流量阀输出的电流，直到所述流量阀输出的流量再次使得换挡机构回位。
需说明的是，关于步骤S111b-步骤S114b的实施细节，可参考上文关于步骤S111a-步骤S114a的描述，在此不再进行赘述。
如此，综合步骤S100的相关步骤来看，通过不断进行自学习，可适应于变速器的硬件变化而得到流量阀中位电流值所产生的偏差值。
步骤S200，基于自学习过程得到的偏差值修正所述流量阀的流量-电流曲线。
优选地，为了更好地保证数据的准确性，在通过所述偏差值修正所述流量-电流曲线时，可确定一个标定的修正因子，使所述偏差值先乘以标定的修正因子，再将得到的乘积与所述初始中位电流相加以得到一个和值，并将所述流量阀的流量-电流曲线上的中位电流值修正为所述和值。即，修正后的中位电流值＝初始中位值+偏差值*修正因子。
其中，所述修正因子可根据车辆驾驶循环模式等进行标定。
更进一步地，在获得修正后的流量-电流曲线，可基于修正后的流量-电流曲线控制所述流量阀，向其输出目标流量所对应的电流，以保证液压充油效果和换挡的平顺性和换挡时间。
综上所述，本发明实施例的流量阀控制方法通过自学习控制策略，不断修正流量阀中位电流值以得到精确的电流-流量曲线，避免了硬件变化导致的中位电流值变化，适用性高，能达到精确控制流量阀的目的，从而可保证液压充油卡效果和换挡的平顺性和换挡时间，且有利于提高变速器的整箱使用寿命。
基于同样的发明思路，本发明实施例还提供了一种流量阀控制装置。图4是本发明实施例的流量控制装置的结构示例图。如图4所示，所述流量阀控制装置可以包括：
自学习模块410，用于从所述流量阀的初始中位电流值开始，进行流量阀中位电流值的自学习。
其中每一次自学习过程包括：控制向所述流量阀输出的电流，以使所述流量阀依次经历以下过程：首次有流量通过、输出的流量使得换挡机构回位、再次有流量通过、输出的流量再次使得换挡机构回位；记录所述流量阀中两次有流量通过时的电流值为最大中位电流值；以及获取所述最大中位电流值与所述初始中位电流值的偏差值。
修正模块420，用于基于所述偏差值修正所述流量阀的流量-电流曲线。
其中，第一次自学习过程中的初始中位电流值为出厂中位电流值，且下一次自学习过程中的初始中位电流值为在前一次自学习过程中修正得到的所述流量-电流曲线中对应的流量阀中位电流值。
在一种优选的实施方式中，所述自学习模块410在所述自学习过程中控制向所述流量阀输出的电流包括：以第一预设速度增加向所述流量阀输出的电流，直到首次有流量通过，记录该首次有流量通过时的电流值为高边最大中位电流值；以第二预设速度降低向所述流量阀输出的电流，直到所述流量阀输出的流量使得换挡机构回位；以第三预设速度降低向所述流量阀输出的电流，直到再次有流量通过，记录该再次有流量通过时的电流值为低边最大中位电流值；以及以第四预设速度增加向所述流量阀输出的电流，直到所述流量阀输出的流量再次使得换挡机构回位。
在另一种优选的实施方式中，所述自学习模块410在所述自学习过程中控制向所述流量阀输出的电流包括：以第一预设速度降低向所述流量阀输出的电流，直到首次有流量通过，记录该首次有流量通过时的电流值为低边最大中位电流值；以第二预设速度增加向所述流量阀输出的电流，直到所述流量阀输出的流量使得换挡机构回位；以第三预设速度增加向所述流量阀输出的电流，直到再次有流量通过，记录该再次有流量通过时的电流值为高边最大中位电流值；以及以第四预设速度降低向所述流量阀输出的电流，直到所述流量阀输出的流量再次使得换挡机构回位。
更为优选地，所述自学习模块410中可以包括有判断子模块411，其用于通过以下方法判断所述流量阀中是否有流量通过：当所述换档机构的当前位置值与初始中位值之差大于第一预设位置阈值，且所述换档机构的所述当前位置值大于第二预设位置阈值时，判断所述流量阀中有流量通过；和/或当所述换挡机构的移动速度大于预设速度阈值时，判断所述流量阀中有流量通过。
更为优选地，所述变速器的流量阀控制装置还可以包括诊断模块430，其用于诊断 在所述自学习过程中的以下条件，并在以下条件中的任意一者不满足时，结束所述自学习过程：车辆行驶工况在所述自学习过程中保持稳定；所述换挡机构的初始中位值不超过第三预设位置阈值；在所述流量阀中有流量通过之前，所述流量阀的电流增加或减小的时间不超过第一预设时间阈值；所述换挡机构回位的时间不超过第二预设时间阈值；以及所述高边最大电流中位值和所述低边最大电流值的偏差不能超过预设的电流偏差阈值。
更进一步地，所述修正模块420用于基于所述偏差值修正所述流量阀的流量-电流曲线可以包括：使所述偏差值乘以标定的修正因子，并将得到的乘积与所述初始中位电流相加以得到一个和值，并将所述流量阀的流量-电流曲线上的中位电流值修正为所述和值。
需说明的是，本发明实施例的流量阀控制装置的具体实施细节及有益效果可参考前述关于流量阀控制方法的实施例，在此不再赘述。
本发明实施例还提供了一种变速器控制装置，且所述变速器控制装置设置上述实施例所述的变速器的流量阀控制装置。
其中，所述变速器控制装置可以是TCU(Transmission Control Unit，自动变速箱控制单元)，如此本发明实施例的流量阀控制策略可直接通过TCU实现，丰富了TCU的控制功能，且有利于提高TCU的使用寿命。
本领域技术人员可以理解实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序存储在一个存储介质中，包括若干指令用以使得单片机、芯片或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述仅为本发明的较佳实施方式而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (11)

  1. 一种流量阀控制方法，其特征在于，所述流量阀控制方法包括：
    从所述流量阀的初始中位电流值开始，进行流量阀中位电流值的自学习，其中每一次自学习过程包括：
    控制向所述流量阀输出的电流，以使所述流量阀依次经历以下过程：首次有流量通过、输出的流量使得换挡机构回位、再次有流量通过、输出的流量再次使得换挡机构回位；
    记录所述流量阀中两次有流量通过时的电流值为最大中位电流值；以及
    获取所述最大中位电流值与所述初始中位电流值的偏差值；
    基于所述偏差值修正所述流量阀的流量-电流曲线；
    其中，第一次自学习过程中的初始中位电流值为出厂中位电流值，且下一次自学习过程中的初始中位电流值为在前一次自学习过程中修正得到的所述流量-电流曲线中对应的流量阀中位电流值。
  2. 根据权利要求1所述的流量阀控制方法，其特征在于，所述控制向所述流量阀输出的电流包括：
    以第一预设速度增加向所述流量阀输出的电流，直到首次有流量通过，记录该首次有流量通过时的电流值为高边最大中位电流值；
    以第二预设速度降低向所述流量阀输出的电流，直到所述流量阀输出的流量使得换挡机构回位；
    以第三预设速度降低向所述流量阀输出的电流，直到再次有流量通过，记录该再次有流量通过时的电流值为低边最大中位电流值；以及
    以第四预设速度增加向所述流量阀输出的电流，直到所述流量阀输出的流量再次使得换挡机构回位。
  3. 根据权利要求1所述的流量阀控制方法，其特征在于，所述控制向所述流量阀输出的电流包括：
    以第一预设速度降低向所述流量阀输出的电流，直到首次有流量通过，记录该首次有流量通过时的电流值为低边最大中位电流值；
    以第二预设速度增加向所述流量阀输出的电流，直到所述流量阀输出的流量使得换挡机构回位；
    以第三预设速度增加向所述流量阀输出的电流，直到再次有流量通过，记录该再次有流量通过时的电流值为高边最大中位电流值；以及
    以第四预设速度降低向所述流量阀输出的电流，直到所述流量阀输出的流量再次使得换挡机构回位。
  4. 根据权利要求2或3所述的流量阀控制方法，其特征在于，通过以下方法判断所述流量阀中是否有流量通过：
    当所述换档机构的当前位置值与初始中位值之差大于第一预设位置阈值，且所述换档机构的所述当前位置值大于第二预设位置阈值时，所述流量阀中有流量通过；和/或
    当所述换挡机构的移动速度大于预设速度阈值时，所述流量阀中有流量通过。
  5. 根据权利要求2或3所述的所述的流量阀控制方法，其特征在于，所述流量阀控制方法还包括：
    在以下条件中的任意一者不满足时，结束所述自学习过程：
    车辆行驶工况在所述自学习过程中保持稳定；
    所述换挡机构的初始中位值不超过第三预设位置阈值；
    在所述流量阀中有流量通过之前，所述流量阀的电流增加或减小的时间不超过第一预设时间阈值；
    所述换挡机构回位的时间不超过第二预设时间阈值；以及
    所述高边最大电流中位值和所述低边最大电流值的偏差不能超过预设的电流偏差阈值。
  6. 一种流量阀控制装置，其特征在于，所述流量阀控制装置包括：
    自学习模块，用于从所述流量阀的初始中位电流值开始，进行流量阀中位电流值的自学习，其中每一次自学习过程包括：
    控制向所述流量阀输出的电流，以使所述流量阀依次经历以下过程：首次有流量通过、输出的流量使得换挡机构回位、再次有流量通过、输出的流量再次使得换 挡机构回位；
    记录所述流量阀中两次有流量通过时的电流值为最大中位电流值；以及
    获取所述最大中位电流值与所述初始中位电流值的偏差值；
    修正模块，用于基于所述偏差值修正所述流量阀的流量-电流曲线；
    其中，第一次自学习过程中的初始中位电流值为出厂中位电流值，且下一次自学习过程中的初始中位电流值为在前一次自学习过程中修正得到的所述流量-电流曲线中对应的流量阀中位电流值。
  7. 根据权利要求6所述的流量阀控制装置，其特征在于，所述自学习模块在所述自学习过程中控制向所述流量阀输出的电流包括：
    以第一预设速度增加向所述流量阀输出的电流，直到首次有流量通过，记录该首次有流量通过时的电流值为高边最大中位电流值；
    以第二预设速度降低向所述流量阀输出的电流，直到所述流量阀输出的流量使得换挡机构回位；
    以第三预设速度降低向所述流量阀输出的电流，直到再次有流量通过，记录该再次有流量通过时的电流值为低边最大中位电流值；以及
    以第四预设速度增加向所述流量阀输出的电流，直到所述流量阀输出的流量再次使得换挡机构回位。
  8. 根据权利要求6所述的流量阀控制装置，其特征在于，所述自学习模块在所述自学习过程中控制向所述流量阀输出的电流包括：
    以第一预设速度降低向所述流量阀输出的电流，直到首次有流量通过，记录该首次有流量通过时的电流值为低边最大中位电流值；
    以第二预设速度增加向所述流量阀输出的电流，直到所述流量阀输出的流量使得换挡机构回位；
    以第三预设速度增加向所述流量阀输出的电流，直到再次有流量通过，记录该再次有流量通过时的电流值为高边最大中位电流值；以及
    以第四预设速度降低向所述流量阀输出的电流，直到所述流量阀输出的流量再次使得换挡机构回位。
  9. 根据权利要求7或8所述的流量阀控制装置，其特征在于，所述自学习模块中包括有判断子模块，其用于通过以下方法判断所述流量阀中是否有流量通过：
    当所述换档机构的当前位置值与初始中位值之差大于第一预设位置阈值，且所述换档机构的所述当前位置值大于第二预设位置阈值时，判断所述流量阀中有流量通过；和/或
    当所述换挡机构的移动速度大于预设速度阈值时，判断所述流量阀中有流量通过。
  10. 根据权利要求7或8所述的所述的流量阀控制装置，其特征在于，所述流量阀控制装置还包括诊断模块，用于诊断在所述自学习过程中的以下条件，并在以下条件中的任意一者不满足时，结束所述自学习过程：
    车辆行驶工况在所述自学习过程中保持稳定；
    所述换挡机构的初始中位值不超过第三预设位置阈值；
    在所述流量阀中有流量通过之前，所述流量阀的电流增加或减小的时间不超过第一预设时间阈值；
    所述换挡机构回位的时间不超过第二预设时间阈值；以及
    所述高边最大电流中位值和所述低边最大电流值的偏差不能超过预设的电流偏差阈值。
  11. 一种计算机可读存储介质，其上存储有计算机程序，其特征在于，该程序被处理器执行时实现权利要求1-5中任一项所述的流量阀控制方法。
PCT/CN2018/123897 2017-12-26 2018-12-26 流量阀控制方法、装置和存储介质 WO2019129058A1 (zh)

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