Pressure control method and apparatus, and electronic device and storage medium

Abstract

A pressure control method and apparatus, and an electronic device and a storage medium. The method comprises: on the basis of a preset condition, determining a first state of a clutch and second states of other subsystems to obtain state determination results (S101); on the basis of the state determination results, determining, from a first pressure to be selected and a second pressure to be selected of a main oil path regulating valve, a first command pressure of the main oil path regulating valve (S102); and on the basis of the first command pressure and the state determination results, determining a target command pressure of a clutch regulating valve, so as to transmit the target command pressure to the clutch (S103). In the method, by determining the states of the clutch and other subsystems, the target command pressure for controlling the clutch is determined, so that a pressure offset provided by a main oil path pressure for the clutch can be eliminated, thereby reducing the main oil path pressure, lowering the power consumption of a hydraulic control system of a vehicle, and ensuring smooth pressure transmission.

Description

Pressure control method and device, electronic device, and storage medium

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. CN202410624731.7, filed on May 20, 2024, and entitled "Pressure control method and device, electronic device, and storage medium", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of vehicle control, in particular to a pressure control method and device, an electronic device, and a storage medium. BACKGROUND

[0004] The existing vehicles generally use a hydraulic system to execute the clutch and synchronizer execution drive scheme for the transmission actuator. The mechanical oil pump is driven by the engine to provide system oil pressure. The main oil path pressure provides the clamping force for the clutch system, and the clutch plate can realize engine torque transmission under the action of the clamping force.

[0005] In the prior art, the control method for the main oil path is to refer to the pressure requirements of each subsystem and add a suitable offset as the demand pressure of the main oil path. For the hydraulic system that needs to work for a long time, the system pressure loss during the long-time clutch engagement process is considerable.

[0006] SUMMARY

[0007] Therefore, the purpose of the present application is to provide a pressure control method and device, an electronic device, and a storage medium to overcome the problems in the prior art.

[0008] In a first aspect, the present application provides a pressure control method applied to a vehicle hydraulic control system, the vehicle hydraulic control system comprising a main oil path regulating valve, a clutch regulating valve, a clutch, and other subsystems, the method comprising:

[0009] judging a first state of the clutch and a second state of the other subsystems based on a preset condition to obtain a state judgment result;

[0010] determining a first command pressure of the main oil path regulating valve from a first candidate pressure and a second candidate pressure of the main oil path regulating valve according to the state judgment result;

[0011] determining a target command pressure of the clutch regulating valve according to the first command pressure and the state judgment result, and transmitting the target command pressure to the clutch.

[0012] Beneficial effects: By judging the state of the clutch and other subsystems, the target command pressure of the clutch is determined, the pressure offset provided by the main oil circuit to the clutch is cancelled, the main oil circuit pressure is reduced, the power consumption of the vehicle hydraulic control system is reduced, and the smooth transmission of pressure is ensured.

[0013] In an optional implementation, the above conditions include a first sub-condition and a second sub-condition, and the preset conditions are used to judge the first state of the clutch and the second state of the other subsystems to obtain a state judgment result, which includes:

[0014] If the first state of the clutch meets the first sub-condition and the second state of the other subsystems meets the second sub-condition, the state judgment result is condition activated;

[0015] If the first state of the clutch does not meet the first sub-condition or the second state of the other subsystems does not meet the second sub-condition, the state judgment result is condition not activated.

[0016] In an optional implementation, the first state of the clutch meeting the first sub-condition means that the first state of the clutch is in a steady-state control process.

[0017] The second state of the other subsystems meeting the second sub-condition means that the pressure demand of the other subsystems to the main oil circuit is zero.

[0018] In an optional implementation, the above determining the first command pressure from the first candidate pressure and the second candidate pressure of the main oil circuit adjusting valve according to the state judgment result includes:

[0019] If the state judgment result is condition activated, the first candidate pressure is taken as the first command pressure; wherein the first candidate pressure is the initial demand pressure of the clutch.

[0020] If the state judgment result is condition not activated, the second candidate pressure is taken as the first command pressure; wherein the second candidate pressure is the maximum demand pressure of the other subsystems to the main oil circuit.

[0021] In an optional implementation, the above determining the target command pressure of the clutch adjusting valve according to the first command pressure and the state judgment result, and transmitting the target command pressure to the clutch, includes:

[0022] If the state judgment result is condition activated, the first command pressure is taken as the target command pressure transmitted to the clutch.

[0023] If the state determination result is that the condition is not activated, the initial demand pressure is transmitted as the target command pressure to the clutch.

[0024] In an alternative embodiment, the method transmits the first command pressure as the target command pressure to the clutch by:

[0025] The initial demand pressure is adjusted to pass a greater current through the clutch modulator valve.

[0026] In some technical solutions of the present application, the vehicle hydraulic control system further comprises a transmission; the method obtains the first candidate pressure by:

[0027] According to the oil temperature of the transmission and a preset oil temperature threshold, a method for calculating the first candidate pressure is determined; the method for calculating the first candidate pressure comprises a bias control method and a closed-loop control method.

[0028] According to the method for calculating the first candidate pressure, the first candidate pressure is obtained.

[0029] In a second aspect, the present application provides a pressure control device applied to a vehicle hydraulic control system, the vehicle hydraulic control system comprising a main oil path modulator valve, a clutch modulator valve, a clutch and other subsystems, the device comprising:

[0030] A determination module is configured to determine a first state of the clutch and a second state of the other subsystems based on a preset condition, to obtain a state determination result.

[0031] A determination module is configured to determine a first command pressure of the main oil path modulator valve from a first candidate pressure and a second candidate pressure of the main oil path modulator valve according to the state determination result.

[0032] A transmission module is configured to determine a target command pressure of the clutch modulator valve according to the first command pressure and the state determination result, to transmit the target command pressure to the clutch.

[0033] In a third aspect, the present application provides an electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the pressure control method described above.

[0034] In a fourth aspect, the present application provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executable on a processor to execute the steps of the pressure control method described above. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed in the description of the specific embodiments or prior art will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0036] FIG. 1 shows a flowchart of a pressure control method provided by an embodiment of the present application;

[0037] FIG. 2 shows a schematic diagram of a vehicle hydraulic control system provided by an embodiment of the present application;

[0038] FIG. 3 shows a schematic diagram of a specific embodiment provided by an embodiment of the present application;

[0039] FIG. 4 shows a schematic diagram of a pressure control device provided by an embodiment of the present application;

[0040] FIG. 5 is a structural schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0042] In a vehicle hydraulic control system, the main oil circuit is needed as the pressure source for the action of each actuator. The current control method is to refer to the pressure demand of each subsystem and add a proper offset as the demand pressure of the main oil circuit. For a hydraulic system that needs to work for a long time, a lower demand pressure of the main oil circuit can greatly reduce the power consumption of the control execution system, thereby achieving the purpose of reducing the power consumption of the whole vehicle. Especially in the application scenario of building pressure by the oil pump and providing pressure for clutch engagement, the system pressure loss during the long-time clutch engagement process is considerable.

[0043] Based on this, the present application provides a pressure control method, device, electronic device and storage medium, which will be described below by embodiments.

[0044] FIG. 1 shows a flowchart of a pressure control method provided by an embodiment of the present application, wherein the method comprises steps S101-S103; applied to a vehicle hydraulic control system, the vehicle hydraulic control system comprises a main oil circuit regulating valve, a clutch regulating valve, a clutch and other subsystems, specifically:

[0045] S101, judging a first state of the clutch and a second state of the other subsystem based on a preset condition, to obtain a state judgment result;

[0046] S102, determining a first command pressure of the main oil way adjusting valve from a first candidate pressure and a second candidate pressure of the main oil way adjusting valve according to the state judgment result;

[0047] S103, determining a target command pressure of the clutch adjusting valve according to the first command pressure and the state judgment result, to transmit the target command pressure to the clutch.

[0048] The application determines the target command pressure of the clutch by judging the states of the clutch and the other subsystem, cancels the pressure offset of the main oil way for the clutch, reduces the main oil way pressure, reduces the power consumption of the vehicle hydraulic control system, and ensures the smooth transmission of the pressure.

[0049] Some embodiments of the application will be described in detail below. The following examples and features in the examples can be combined with each other without conflict.

[0050] The pressure control method in the embodiments of the application is applied to a vehicle hydraulic control system, which includes a main oil way adjusting valve, a clutch adjusting valve, a clutch, a transmission and other subsystems; the clutch is connected in series with the main oil way adjusting valve and the clutch adjusting valve. As shown in FIG. 2, F1 represents the main oil way adjusting valve, F2 represents the clutch adjusting valve, and L represents the clutch. The other subsystems herein include a gear action execution system, a key component cooling system, a shaft tooth lubrication system, etc.

[0051] The embodiments of the application set corresponding judgment conditions for the first state of the clutch and the second state of the other subsystem when judging the two states: a first sub-condition for judging the first state of the clutch and a second sub-condition for judging the second state of the other subsystem. When the first state of the clutch meets the first sub-condition and the second state of the other subsystem meets the second sub-condition, the obtained state judgment result is condition activated; otherwise, the obtained state judgment result is condition not activated. That is, when the first state of the clutch does not meet the first sub-condition and the second state of the other subsystem meets the second sub-condition, the obtained state judgment result is condition not activated. When the first state of the clutch meets the first sub-condition and the second state of the other subsystem does not meet the second sub-condition, the obtained state judgment result is condition not activated. When the first state of the clutch does not meet the first sub-condition and the second state of the other subsystem does not meet the second sub-condition, the obtained state judgment result is condition not activated.

[0052] Further, the first state of the clutch satisfying the first sub-condition is that the first state of the clutch is in a steady state control process. The steady state control process herein is that the current state of the clutch is locked (not in the oil filling process or the locking process). The second state of the other subsystem satisfying the second sub-condition is that the pressure demand of the other subsystem to the main oil circuit is zero.

[0053] After obtaining the state judgment result, the embodiment of the application needs to calculate a first candidate pressure and a second candidate pressure of the main oil circuit regulating valve, the first candidate pressure being an initial demand pressure of the clutch, and the second candidate pressure being a maximum demand pressure of the other subsystem to the main oil circuit. After obtaining the first candidate pressure and the second candidate pressure through calculation, the first candidate pressure and the second candidate pressure need to be selected according to the state judgment result to determine a first command pressure.

[0054] The specific selection process is: when the state judgment result is the condition activated, the first candidate pressure is taken as the first command pressure; when the state judgment result is the condition not activated, the second candidate pressure is taken as the first command pressure. That is, when the condition is activated, the initial demand pressure of the clutch is taken as the first command pressure, otherwise the maximum demand pressure of the other subsystem to the main oil circuit is taken as the first command pressure.

[0055] After determining the first command pressure of the main oil circuit, it is also needed to determine whether to take the first command pressure as a target command pressure of the clutch regulating valve according to the state judgment result. The specific judgment process is: when the state judgment result is the condition activated, the first command pressure is taken as the target command pressure and transmitted to the clutch; when the state judgment result is the condition not activated, the initial demand pressure is taken as the target command pressure and transmitted to the clutch.

[0056] When the first command pressure is taken as the target command pressure, the embodiment of the application adopts the way of adjusting the initial demand pressure. By increasing the initial demand pressure of the clutch, the current passing through the clutch regulating valve can pass through the clutch regulating valve in the form of the maximum current, so as to make the clutch regulating valve control the clutch based on the maximum current.

[0057] In an optional embodiment, when determining the first command pressure, the embodiment of the application is based on the oil temperature of the transmission. According to the oil temperature of the transmission and a preset oil temperature threshold, a method for calculating the first candidate pressure is determined; the method for calculating the first candidate pressure includes: an offset control method and a closed-loop control method; the first candidate pressure is obtained according to the method for calculating the first candidate pressure.

[0058] In a specific implementation, the oil temperature threshold value herein can be set to 30°C (calibratable change). The calculation method of the first candidate pressure is as follows: when the transmission oil temperature is lower than 30°C, offset control is adopted to maintain the stability of the system and prevent pressure fluctuation, wherein the offset amount is determined by table lookup, and the table lookup input parameter is the difference between the oil temperature, the actual pressure and the command pressure. When the transmission oil temperature is higher than or equal to 30°C, PID closed-loop control is adopted, and the PID control parameters are calibratable parameters, and the parameters are obtained by table lookup.

[0059] In an optional implementation, the pressure control method in the embodiments of the application can be performed with reference to the flow shown in FIG. 3:

[0060] State judgment: the demand of other subsystems for the main oil circuit pressure is lower than the clutch command pressure, and it is considered that the current state is condition activation. The other subsystems include the gear action execution system, the key component cooling system and the shaft tooth lubrication system.

[0061] Main oil circuit pressure demand calculation: when the state judgment result is condition activation, the clutch demand pressure is output as the main oil circuit demand pressure, and a segmented control algorithm is adopted for the demand pressure control. When the transmission oil temperature is lower than 30°C (calibratable change), offset control is adopted to maintain the stability of the system and prevent pressure fluctuation, wherein the offset amount is determined by table lookup, and the table lookup input parameter is the difference between the oil temperature, the actual pressure and the command pressure. When the transmission oil temperature is higher than or equal to 30°C, PID closed-loop control is adopted, and the PID control parameters are calibratable parameters, and the parameters are obtained by table lookup. When the state judgment result is condition inactivation, the maximum demand pressure of the other subsystems is output as the first command pressure of the main oil circuit regulating valve.

[0062] Clutch pressure demand calculation: when the state judgment result is condition activation, the clutch pressure command is amplified to the maximum capacity, which is usually realized in the form of maximum current. Conversely, when the state judgment result is condition inactivation, the actual pressure demand of the clutch pressure plate pressure is output.

[0063] FIG. 4 shows a structural schematic diagram of a pressure control device provided by the embodiments of the application: applied to a vehicle hydraulic control system, the vehicle hydraulic control system includes a main oil circuit regulating valve, a clutch regulating valve, a clutch and other subsystems, and the device includes:

[0064] A judgment module is configured to judge a first state of the clutch and a second state of the other subsystems based on a preset condition, and obtain a state judgment result.

[0065] A determination module is configured to determine a first command pressure of the main oil circuit regulating valve from a first candidate pressure and a second candidate pressure of the main oil circuit regulating valve according to the state judgment result.

[0066] a delivery module configured to determine a target command pressure of the clutch regulating valve according to the first command pressure and the state judgment result, and to deliver the target command pressure to the clutch.

[0067] The condition comprises a first sub-condition and a second sub-condition, and the state judgment result is obtained by judging the first state of the clutch and the second state of the other subsystem based on the preset condition, and the state judgment result comprises:

[0068] If the first state of the clutch satisfies the first sub-condition and the second state of the other subsystem satisfies the second sub-condition, the state judgment result is condition activated;

[0069] If the first state of the clutch does not satisfy the first sub-condition or the second state of the other subsystem does not satisfy the second sub-condition, the state judgment result is condition inactivated.

[0070] The first state of the clutch satisfying the first sub-condition means that the first state of the clutch is in a steady state control process.

[0071] The second state of the other subsystem satisfying the second sub-condition means that the pressure demand of the other subsystem to the main oil circuit is zero.

[0072] The first command pressure is determined from the first candidate pressure and the second candidate pressure of the main oil regulating valve according to the state judgment result, and the first command pressure comprises:

[0073] If the state judgment result is condition activated, the first candidate pressure is taken as the first command pressure; wherein the first candidate pressure is an initial demand pressure of the clutch.

[0074] If the state judgment result is condition inactivated, the second candidate pressure is taken as the first command pressure; wherein the second candidate pressure is a maximum demand pressure of the other subsystem to the main oil circuit.

[0075] The target command pressure of the clutch regulating valve is determined according to the first command pressure and the state judgment result, and the target command pressure is delivered to the clutch, and the target command pressure comprises:

[0076] If the state judgment result is condition activated, the first command pressure is taken as the target command pressure delivered to the clutch.

[0077] If the state judgment result is condition inactivated, the initial demand pressure is taken as the target command pressure delivered to the clutch.

[0078] The first command pressure is transmitted as the target command pressure to the clutch by:

[0079] The initial demand pressure is adjusted to pass a greater current through the clutch modulator valve.

[0080] The first candidate pressure is obtained by:

[0081] According to the oil temperature of the transmission and a preset oil temperature threshold, a method for calculating the first candidate pressure is determined; the method for calculating the first candidate pressure includes: an offset control method and a closed-loop control method.

[0082] The first candidate pressure is obtained according to the method for calculating the first candidate pressure.

[0083] As shown in FIG. 5, an electronic device is provided for executing the pressure control method in the present application, the device includes a memory, a processor, a bus, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the pressure control method.

[0084] Specifically, the memory and the processor can be general memory and processor, which are not specifically limited herein, and when the processor executes the computer program stored in the memory, the pressure control method can be executed.

[0085] Corresponding to the pressure control method in the present application, an embodiment of the present application further provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and the computer program is executed by a processor to execute the steps of the pressure control method.

[0086] Specifically, the storage medium can be a general storage medium, such as a mobile disk, a hard disk, etc., and the computer program on the storage medium can be executed to execute the pressure control method.

[0087] In the embodiments provided in the present application, it should be understood that the disclosed system and method can be implemented in other ways. The system embodiments described above are only schematic. For example, the division of the units is only a logical function division, and another division manner can be used in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some communication interfaces. The coupling or communication connection can be electrical, mechanical or in other forms.

[0088] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, and may be located in one place, or distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0089] In addition, the functional units in the embodiments provided in the present application can be integrated in one processing unit, or each unit can be physically present alone, or two or more units can be integrated in one unit.

[0090] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the parts that essentially contribute to the prior art or the parts of the technical solutions can be embodied in the form of software products. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned 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 various program code storage media.

[0091] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings, in addition, the terms "first", "second", "third" and the like are only used to distinguish description, and cannot be understood as indicating or implying relative importance.

[0092] Although the embodiments of the present application are described in combination with the drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations all fall within the scope defined by the appended claims. Industrial applicability

[0093] The first state of the clutch and the second state of the other subsystem are judged based on preset conditions to obtain a state judgment result; a first command pressure of the main oil way adjusting valve is determined from a first selected pressure and a second selected pressure of the main oil way adjusting valve according to the state judgment result; a target command pressure of the clutch adjusting valve is determined according to the first command pressure and the state judgment result, so as to transmit the target command pressure to the clutch. The target command pressure of the clutch is determined by judging the states of the clutch and the other subsystem, the pressure offset provided by the main oil way pressure for the clutch is cancelled, the main oil way pressure is reduced, the power consumption of the vehicle hydraulic control system is reduced, and the smooth transmission of the pressure is ensured.

Claims

1. A pressure control method, characterized by, The method is applied to a vehicle hydraulic control system, and the vehicle hydraulic control system comprises a main oil path regulating valve, a clutch regulating valve, a clutch and other subsystems, and the method comprises the following steps: judging a first state of the clutch and a second state of the other subsystems based on preset conditions to obtain a state judgment result; determining a first command pressure of the main oil path regulating valve from a first candidate pressure and a second candidate pressure of the main oil path regulating valve according to the state judgment result; determining a target command pressure of the clutch regulating valve according to the first command pressure and the state judgment result, and transmitting the target command pressure to the clutch.

2. The method of claim 1, wherein, The conditions comprise a first sub-condition and a second sub-condition, and the judging of the first state of the clutch and the second state of the other subsystems based on the preset conditions to obtain the state judgment result comprises the following steps: if the first state of the clutch satisfies the first sub-condition and the second state of the other subsystems satisfies the second sub-condition, the state judgment result obtained is condition activation; if the first state of the clutch does not satisfy the first sub-condition or the second state of the other subsystems does not satisfy the second sub-condition, the state judgment result obtained is condition inactivation.

3. The method of claim 2, wherein, The first state of the clutch satisfying the first sub-condition is that the first state of the clutch is in a steady-state control process. The second state of the other subsystems satisfying the second sub-condition is that the pressure demand of the other subsystems for the main oil path is zero.

4. The method of claim 2, wherein, The determining of the first command pressure from the first candidate pressure and the second candidate pressure of the main oil path regulating valve according to the state judgment result comprises the following steps: if the state judgment result is condition activation, the first candidate pressure is taken as the first command pressure; wherein the first candidate pressure is an initial demand pressure of the clutch; if the state judgment result is condition inactivation, the second candidate pressure is taken as the first command pressure; wherein the second candidate pressure is a maximum demand pressure of the other subsystems for the main oil path.

5. The method of claim 4, wherein, The determining of the target command pressure of the clutch regulating valve according to the first command pressure and the state judgment result, and the transmitting of the target command pressure to the clutch comprises the following steps: if the state judgment result is condition activation, the first command pressure is taken as the target command pressure and transmitted to the clutch; if the state judgment result is condition inactivation, the initial demand pressure is taken as the target command pressure and transmitted to the clutch.

6. The method of claim 5, wherein, The method transmits the first command pressure to the clutch as the target command pressure in the following way: the initial demand pressure is adjusted to make a larger current pass through the clutch regulating valve.

7. The method of claim 4, wherein, The vehicle hydraulic control system further comprises a transmission, and the method obtains the first candidate pressure in the following way: determining a method for calculating the first candidate pressure according to an oil temperature of the transmission and a preset oil temperature threshold value; the method for calculating the first candidate pressure comprises an offset control method and a closed-loop control method; the first candidate pressure is obtained according to the method for calculating the first candidate pressure.

8. A pressure control device, characterized by The device is applied to a vehicle hydraulic control system, and the vehicle hydraulic control system comprises a main oil path regulating valve, a clutch regulating valve, a clutch and other subsystems. A judging module is configured to judge a first state of the clutch and a second state of the other subsystems based on a preset condition to obtain a state judgment result. A determining module is configured to determine a first command pressure of the main oil path regulating valve from a first candidate pressure and a second candidate pressure of the main oil path regulating valve according to the state judgment result. A transmitting module is configured to determine a target command pressure of the clutch regulating valve according to the first command pressure and the state judgment result, and transmit the target command pressure to the clutch.

9. An electronic device, comprising: The device comprises a processor, a memory and a bus, the memory stores machine readable instructions executable by the processor, when the electronic device is running, the processor and the memory communicate through the bus, and the machine readable instructions are executed by the processor to perform the steps of the pressure control method according to any one of claims 1 to 7. The computer readable storage medium stores a computer program, and the computer program is executed by the processor to perform the steps of the pressure control method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, ​

Images