Oil pump motor low-temperature starting method, device and equipment and storage medium

Abstract

The invention provides an oil pump motor low-temperature starting method, device and equipment and a storage medium, and relates to the technical field of motor control. Whether an oil pump motor reverse rotation instruction is sent to the vehicle or not is judged according to the first oil temperature and a vehicle gear state signal, if yes, the oil pump motor is controlled to conduct reverse rotation, then whether the state of the oil pump motor in the reverse rotation state reaches a preset condition or not is judged, and if yes, the oil pump motor is controlled to stop reverse rotation, and the vehicle is started. And finally, responding to the forward rotation starting instruction of the oil pump motor, and controlling the oil pump motor to start. Therefore, before the forward rotation starting instruction is sent to the oil pump motor, the oil pump motor is controlled to rotate reversely, the oil temperature is increased, and the oil viscous resistance is reduced, so that the probability of successful starting of the oil pump motor is increased. Therefore, the problem that when the temperature of the environment where the vehicle is located is low, motor starting fails due to the fact that the viscous resistance of oil is large is solved.

Description

Technical Field

[0001] The present application relates to the field of motor control technology, and in particular to a method, device, equipment and storage medium for low-temperature starting of an oil pump motor. Background Art

[0002] The vehicle's oil pump motor and oil pump are integrated in the valve body box of the vehicle's automatic transmission. When the vehicle's automatic transmission control unit sends a control command to control the oil pump motor to start, the oil pump motor responds to the command to pump the hydraulic oil in the oil pump into the main oil circuit, thereby realizing control of vehicle-related functions, such as controlling the movement of actuators in the hydraulic system, such as sliding valves and pistons, thereby realizing the opening or engagement of the clutch / brake; realizing the related functions of the parking mechanism; realizing the cooling and lubrication needs of related components of the automatic transmission, etc.

[0003] However, when the vehicle is in a low temperature environment, the dynamic viscosity coefficient of the hydraulic oil in the oil pump increases sharply due to the low temperature, and the oil fluidity becomes poor. As a result, the oil pump motor fails to start due to the large oil resistance during the oil pumping process, and the relevant functions of the vehicle cannot be realized. Summary of the invention

[0004] In view of this, the present application provides a low-temperature starting method, device, equipment and storage medium for an oil pump motor, aiming to solve the problem of oil pump motor starting failure caused by high viscous resistance of the oil when the ambient temperature of the vehicle is low.

[0005] In a first aspect, the present application provides a method for starting an oil pump motor at low temperature, comprising:

[0006] Acquire a first oil temperature of an oil pump motor and a vehicle gear position status signal;

[0007] Determining whether to send an oil pump motor reversal instruction to the vehicle according to the first oil temperature and the vehicle gear state signal; if so, controlling the oil pump motor to reverse;

[0008] Determine whether the state of the oil pump motor in the reverse state reaches a preset exit condition; if the state of the oil pump motor in the reverse state reaches a first preset exit condition, control the oil pump motor to stop reverse rotation;

[0009] In response to an oil pump motor forward rotation start instruction, the oil pump motor is controlled to start.

[0010] Optionally, judging whether to send an oil pump motor reversal instruction to the vehicle according to the first oil temperature and the vehicle gear state signal includes:

[0011] determining whether the first oil temperature is within a preset temperature range;

[0012] determining whether the vehicle gear state signal indicates that the vehicle is in a neutral gear or a parking gear state;

[0013] When the first oil temperature is within a preset temperature range and the vehicle is in a neutral gear or a parking gear state, an oil pump motor reverse rotation instruction is sent to the vehicle.

[0014] Optionally, controlling the oil pump motor to reverse includes:

[0015] According to the first temperature, searching for a corresponding reversal time in a preset temperature-speed table, and searching for a corresponding reversal speed in a preset temperature-speed table;

[0016] The oil pump motor is controlled to reverse according to the time and speed obtained from the table.

[0017] Optionally, the method further includes:

[0018] If the state of the oil pump motor in the reverse state reaches a second preset exit condition, controlling the oil pump motor to stop reverse rotation;

[0019] Acquire a second oil temperature of the oil pump motor and a vehicle gear status signal;

[0020] Whether to send an oil pump motor reverse direction instruction to the vehicle is determined according to the second oil temperature and the vehicle gear state signal.

[0021] Optionally, the first preset exit condition includes:

[0022] The reverse rotation time of the oil pump motor reaches the preset reverse rotation time.

[0023] Optionally, the second preset exit condition includes: the motor reverse rotation is interrupted, the motor forward rotation command is received, or the vehicle gear state is not in neutral or parking state.

[0024] In a second aspect, the present application provides a low-temperature starting device for an oil pump motor, comprising:

[0025] An acquisition unit, used for acquiring a first oil temperature of an oil pump motor and a vehicle gear position status signal;

[0026] a judgment unit, configured to judge whether to send an oil pump motor reverse direction instruction to the vehicle according to the first oil temperature and the vehicle gear state signal;

[0027] A control unit, used for controlling the oil pump motor to reverse according to the judgment result of the judgment unit;

[0028] The judging unit is further used to judge whether the state of the oil pump motor in the reverse state reaches a preset exit condition;

[0029] The control unit is further configured to control the oil pump motor to stop reversing if the state of the oil pump motor in the reverse state reaches a first preset exit condition; and in response to a forward rotation start instruction of the oil pump motor, control the oil pump motor to start.

[0030] Optionally, the determination unit is specifically configured to determine whether the first oil temperature is within a preset temperature range;

[0031] Determine whether the vehicle gear state signal indicates that the vehicle is in a neutral gear or a parking gear state;

[0032] The control unit is specifically configured to send a reverse rotation instruction of the oil pump motor to the vehicle when the first oil temperature is within the preset temperature range and the vehicle is in a neutral gear or a parking gear state.

[0033] Optionally, the control unit controls the oil pump motor to reverse, including:

[0034] Search for a corresponding reverse rotation time in a preset temperature-time table according to the first temperature, and search for a corresponding reverse rotation speed in a preset temperature-speed table;

[0035] Control the oil pump motor to reverse according to the time and speed obtained from the table look-up.

[0036] Optionally, the control unit is further configured to:

[0037] If the state of the oil pump motor in the reverse state reaches a second preset exit condition, control the oil pump motor to stop reversing;

[0038] The acquisition unit is further configured to acquire the second oil temperature of the oil pump motor and the vehicle gear state signal;

[0039] The determination unit is further configured to determine whether to send a reverse rotation instruction of the oil pump motor to the vehicle according to the second oil temperature and the vehicle gear state signal.

[0040] Optionally, the first preset exit condition includes:

[0041] The reverse rotation time of the oil pump motor reaches the preset reverse rotation time.

[0042] Optionally, the second preset exit condition includes: motor reverse interruption, receiving a motor forward rotation instruction, or the vehicle gear state not being in a neutral gear or a parking gear state.

[0043] In a third aspect, the present application provides a computing device, which includes a memory and a processor. The memory is used to store instructions or codes, and the processor is used to execute the instructions or codes so that the computing device executes the oil pump motor low-temperature start method according to any one of the foregoing first aspects.

[0044] In a fourth aspect, the present application provides a computer-readable storage medium, in which codes are stored. When the codes are executed, a device executing the codes implements the low-temperature starting method for the oil pump motor as described in any one of the first aspects above.

[0045] The present application provides a method for low-temperature starting of an oil pump motor. When executing the method, the first oil temperature and vehicle gear status signal of the oil pump motor are first obtained, and then it is determined whether to send an oil pump motor reversal instruction to the vehicle based on the first oil temperature and vehicle gear status signal. If so, the oil pump motor is controlled to reverse, and then it is determined whether the state of the oil pump motor in the reversal state reaches a preset exit condition. If the state of the oil pump motor in the reversal state reaches the first preset exit condition, the oil pump motor is controlled to stop reversing, and finally, in response to the forward start instruction of the oil pump motor, the oil pump motor is controlled to start. Therefore, before sending a forward start instruction to the oil pump motor, the oil pump motor is first controlled to reverse, increase the oil temperature, and reduce the oil viscosity resistance, so as to increase the probability of successful starting of the oil pump motor. This solves the problem of motor starting failure due to large oil viscosity resistance when the ambient temperature of the vehicle is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in this embodiment or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 A schematic diagram of a process of oil pump motor starting failure provided in an embodiment of the present application;

[0048] Figure 2 A flow chart of a method for starting an oil pump motor at low temperature provided in an embodiment of the present application;

[0049] Figure 3 A schematic structural diagram of a low-temperature starting device for an oil pump motor provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] As described in the background technology of this application, the oil pump motor in the current vehicle automatic transmission is basically a small brushless direct current motor. When the hydraulic system actuator or the main oil pressure sends an oil pressure request, the motor speed is controlled to control the oil pump to pump oil according to the target demand. However, when the vehicle is in a low temperature environment, the low temperature causes the oil dynamic viscosity coefficient to increase sharply, and the oil fluidity deteriorates sharply. During the oil pumping process, the motor may fail to start due to the large oil resistance. Figure 1 As shown in the figure, the first two dashed lines indicate that the motor failed to start, and the motor was successfully started after the third attempt. Therefore, in a low-temperature environment, when the motor is started for the first time, the oil resistance is very large, resulting in a high probability of motor failure, which has a certain impact on the driving performance of the vehicle.

[0051] In order to solve the above technical problems, an embodiment of the present application provides a method for starting an oil pump motor at low temperature, the method comprising:

[0052] First, the first oil temperature and vehicle gear status signal of the oil pump motor are obtained, and then it is determined whether to send an oil pump motor reversal command to the vehicle based on the first oil temperature and vehicle gear status signal. If so, the oil pump motor is controlled to reverse, and then it is determined whether the state of the oil pump motor in the reversing state reaches a preset exit condition. If the state of the oil pump motor in the reversing state reaches the first preset exit condition, the oil pump motor is controlled to stop reversing, and finally, in response to the oil pump motor forward start command, the oil pump motor is controlled to start.

[0053] Therefore, before issuing a forward start command to the oil pump motor, the oil pump motor is first controlled to reverse, so as to increase the oil temperature, reduce the oil viscosity resistance, and increase the probability of successful start of the oil pump motor. This solves the problem of motor start failure due to large oil viscosity resistance when the vehicle is in a low ambient temperature.

[0054] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] Figure 1 A flowchart of a method for starting a low-temperature oil pump motor provided in an embodiment of the present application. Figure 1 As shown, the low temperature starting method of the oil pump motor provided in the embodiment of the present application may include:

[0056] S101, obtaining a first oil temperature of an oil pump motor and a vehicle gear status signal.

[0057] The oil pump motor described in the present application is an oil pump motor of a certain type of dual-clutch automatic transmission.

[0058] When the vehicle is in a low-temperature environment, the oil temperature in the oil pump motor is low, which makes the oil viscosity higher. It is necessary to obtain the temperature of the oil to determine whether the oil temperature needs to be increased.

[0059] The transmission control unit (TCU) can obtain the oil temperature of the oil pump motor through the oil temperature sensor, and the first oil temperature is the oil temperature of the oil pump motor in a low temperature environment before the oil pump motor is started.

[0060] The vehicle gear position is determined by acquiring the vehicle gear position status signal, such as P, R, N, D, 2 (or S), L (or 1), etc.

[0061] S102, judging whether to send an oil pump motor reverse command to the vehicle according to the first oil temperature and the vehicle gear status signal; if so, controlling the oil pump motor to reverse.

[0062] After obtaining the first oil temperature of the oil pump motor and the gear state of the vehicle, it is determined whether the conditions for controlling the oil pump motor to reverse are met compared with the preset reversal conditions. For example, if the preset reversal condition is that the first temperature is less than -10°C and the vehicle is in the parking gear state, then when the first temperature is higher than the temperature in the preset reversal condition, the oil pump motor cannot be controlled to reverse. Similarly, when the first temperature meets the temperature in the preset reversal condition and the vehicle gear state is not the parking gear, the oil pump motor cannot be controlled to reverse. Only when all the conditions in the preset reversal conditions are met can the oil pump motor be controlled to reverse.

[0063] S103, determining whether the state of the oil pump motor in the reverse state reaches a preset exit condition; if the state of the oil pump motor in the reverse state reaches a first preset exit condition, controlling the oil pump motor to stop reverse rotation.

[0064] When the oil pump motor meets the conditions for controlling the reversal of the oil pump motor, the oil pump motor enters the reversal mode in response to the reversal command. It is understandable that when the oil pump motor reverses, the oil temperature will rise, the viscosity of the oil will decrease, and the motor can be successfully started. Therefore, after the oil pump motor reverses for a period of time, the reversal mode can be exited. The preset exit condition is to determine whether the motor in the reversal state can stop reversing. The situation where the motor exits the reversal can be divided into two situations. One is to automatically exit when the preset conditions are met, such as reaching the reversal time or the oil temperature reaches a certain value; the other is the unexpected interruption of the reversal. Since the motor reversal request is the lowest priority instruction in the motor request, when the oil pump motor in the reversal state is interrupted by other instructions, the reversal mode is exited.

[0065] The first pre-exit condition refers to the situation where the oil pump motor is not accidentally interrupted in the reverse state and exits the reverse mode.

[0066] S104 . In response to the oil pump motor forward rotation start instruction, control the oil pump motor to start.

[0067] When the oil pump motor exits the reverse mode due to meeting the first preset exit condition, it means that the oil temperature in the oil pump motor has increased. At this time, the oil pump motor can be controlled to start normally, that is, the motor can be controlled to rotate forward. Since the temperature of the oil will increase after the motor is reversed, the viscosity will decrease, which increases the probability of successful motor start.

[0068] In an implementation of the above embodiment of the present application, judging whether to send an oil pump motor reverse direction instruction to the vehicle according to the first oil temperature and the vehicle gear state signal includes:

[0069] determining whether the first oil temperature is within a preset temperature range;

[0070] determining whether the vehicle gear state signal indicates that the vehicle is in a neutral gear or a parking gear state;

[0071] When the first oil temperature is within a preset temperature range and the vehicle is in a neutral gear or a parking gear state, an oil pump motor reverse rotation instruction is sent to the vehicle.

[0072] The preset temperature range can be -40℃-0℃. When the first oil temperature is within the preset temperature range, it is a temperature that can control the motor reversal. At the same time, the gear position of the vehicle must be judged. Since the motor reversal function needs to meet the requirement of not interfering with the normal driving of the whole vehicle, when the motor reversal function is activated, it is necessary to ensure that the gear position of the whole vehicle is in N gear or P gear. If the gear position of the whole vehicle is not in the P / N gear position, the motor reversal is prohibited.

[0073] In an implementation of the above embodiment of the present application, controlling the oil pump motor to reverse includes:

[0074] Look up the corresponding reverse time in the preset temperature - time table according to the first temperature, and look up the corresponding reverse speed in the preset temperature - speed table; control the oil pump motor to reverse according to the time and speed obtained from the table look - up.

[0075] It can be understood that the lower the actual oil temperature, the greater the viscosity coefficient of the oil, and the greater the oil resistance during oil pumping. Therefore, the longer the reverse time of the motor should be to stir the oil for as long as possible, and at the same time, the higher the target reverse speed should be. The preset temperature - time table is shown in Table 1. The table includes the time required for reverse at different gearbox temperatures. For example, when the oil temperature in the current oil pump motor is - 40°C, the reverse time of the oil pump motor needs to be set to 500 ms.

[0076] The preset temperature - speed table is shown in Table 2. The table includes the specific speed when the oil pump motor reverses at different gearbox oil temperatures. For example, when the oil temperature in the current oil pump motor is - 40°C, the reverse speed of the oil pump motor needs to be set to 2500 rpm. Combining the temperature - time table and the temperature - speed table, the reverse time and speed of the oil pump motor can be set. For example, when the first temperature of the current oil pump is - 20°C, it is found from Table 1 and Table 2 that the oil pump motor needs to be controlled to reverse at 2000 rpm for 300 ms.

[0077] Table 1 Temperature - Time Table

[0078] Transmission oil temperature -40℃ -20℃ 0℃ 10℃ 20℃ Reverse time 500ms 300ms 150ms 100ms 100ms

[0079] Table 2 Temperature - Speed Table

[0080] Transmission oil temperature -40℃ -20℃ 0℃ 10℃ 20℃ Reverse speed 2500rpm 2000rpm 1500rpm 1000rpm 1000rpm

[0081] In an implementation manner of the above - mentioned embodiment of the present application, if the state of the oil pump motor in the reverse state reaches the second preset exit condition, then control the oil pump motor to stop reversing;

[0082] Obtain the second oil temperature of the oil pump motor and the vehicle gear state signal;

[0083] Judge whether to send an oil pump motor reverse instruction to the vehicle according to the second oil temperature and the vehicle gear state signal.

[0084] In the above embodiment, it is mentioned that the judgment of the exit of the motor reversal function depends on whether the reversal function is completed on the one hand, and whether there are other requests that need to interrupt the motor reversal function on the other hand. It should be clear that the motor reversal request is the lowest priority instruction in the motor request. When the motor reversal time reaches or exceeds the target time, the motor reversal function is exited; during the motor reversal process, if the motor forward start command is received, the reversal function is exited immediately; during the motor reversal process, if the actual gear does not meet the conditions for reversal activation, the reversal function is exited; if during the motor reversal process, the motor forward start command is not received, and the motor reversal is unexpectedly interrupted, then re-judge whether to activate the motor reversal function.

[0085] In an implementation of the above embodiment of the present application, the first preset exit condition includes:

[0086] The reversal time of the oil pump motor reaches the preset reversal time. Specifically, for example, the preset reversal time of the oil pump motor is 500ms. When the reversal time reaches 500ms, the oil pump motor automatically exits the reversal mode. The second preset exit condition includes: the motor reversal is interrupted, the motor forward command is received, or the vehicle gear state is not in the neutral gear or the parking gear state.

[0087] That is, the first preset exit state is the case where the oil pump motor automatically exits the reverse mode, and the second preset exit state is the case where the oil pump motor is interrupted by an unexpected impact and the reverse is interrupted. In the case of such an unexpected interruption of the reverse mode, it is necessary to determine again whether to re-enter the reverse mode, that is, it is necessary to repeat the above steps S101-S102. The second temperature obtained at this time is the current oil temperature after the reverse interruption. Since the second oil temperature is the oil temperature obtained after the oil pump motor is reversed, the second oil temperature is generally higher than the first oil temperature. After obtaining the second oil temperature, it is determined whether to send an oil pump motor reverse command to the vehicle according to the second oil temperature and the vehicle gear status signal; if so, the oil pump motor is controlled to reverse.

[0088] The above-mentioned embodiment of the present application proposes a low-temperature starting method for an oil pump motor, which includes first obtaining a first oil temperature and a vehicle gear status signal of the oil pump motor, and then judging whether to send an oil pump motor reverse command to the vehicle based on the first oil temperature and the vehicle gear status signal; if so, controlling the oil pump motor to reverse, and then judging whether the state of the oil pump motor in the reverse state reaches a preset exit condition; if the state of the oil pump motor in the reverse state reaches the first preset exit condition, controlling the oil pump motor to stop reversing; and finally responding to the oil pump motor forward start command to control the oil pump motor to start.

[0089] Therefore, before issuing a forward start command to the oil pump motor, the oil pump motor is first controlled to reverse, increase the oil temperature, and reduce the oil viscosity resistance, so as to increase the probability of successful start of the oil pump motor. This solves the problem of motor start failure due to large oil viscosity resistance when the vehicle is in a low ambient temperature.

[0090] The above are some specific implementations of a method for starting a pump motor at low temperature provided in the embodiment of the present application. Based on this, the present application also provides a corresponding device. The device provided in the embodiment of the present application will be introduced from the perspective of functional modularization.

[0091] Figure 3 A schematic structural diagram of a low-temperature starting device for an oil pump motor provided in an embodiment of the present application.

[0092] Combination Figure 3 As shown, the oil pump motor low temperature starting device 300 provided in the embodiment of the present application includes:

[0093] An acquisition unit 310 is used to acquire a first oil temperature of an oil pump motor and a vehicle gear position state signal;

[0094] A determination unit 320, configured to determine whether to send an oil pump motor reverse direction instruction to the vehicle according to the first oil temperature and the vehicle gear state signal;

[0095] A control unit 330, configured to control the oil pump motor to reverse according to the determination result of the determination unit;

[0096] The judging unit is further used to judge whether the state of the oil pump motor in the reverse state reaches a preset exit condition;

[0097] The control unit is further configured to control the oil pump motor to stop reversing if the state of the oil pump motor in the reversing state reaches a first preset exit condition; and to control the oil pump motor to start in response to a forward start instruction of the oil pump motor.

[0098] In an implementation of the embodiment of the present application, the judgment unit is specifically used to judge whether the first oil temperature is within a preset temperature range; judge whether the vehicle gear state signal indicates that the vehicle is in a neutral gear or a parking gear state;

[0099] The control unit is specifically configured to send an oil pump motor reversal instruction to the vehicle when the first oil temperature is within a preset temperature range and the vehicle is in a neutral gear or a parking gear state.

[0100] In an implementation of the embodiment of the present application, the control unit controls the oil pump motor to reverse, including:

[0101] According to the first temperature, searching for a corresponding reversal time in a preset temperature-speed table, and searching for a corresponding reversal speed in a preset temperature-speed table;

[0102] The oil pump motor is controlled to reverse according to the time and speed obtained from the table.

[0103] In one implementation of the embodiment of the present application, the control unit is further configured to:

[0104] If the state of the oil pump motor in the reverse state reaches a second preset exit condition, controlling the oil pump motor to stop reverse rotation;

[0105] The acquisition unit is also used to acquire a second oil temperature of the oil pump motor and a vehicle gear position status signal;

[0106] The judgment unit is further used to judge whether to send an oil pump motor reverse direction instruction to the vehicle according to the second oil temperature and the vehicle gear state signal.

[0107] In an implementation of the embodiment of the present application, the first preset exit condition includes:

[0108] The reverse rotation time of the oil pump motor reaches the preset reverse rotation time.

[0109] In one implementation of the embodiment of the present application, the second preset exit condition includes: motor reverse interruption, receiving a motor forward command, or the vehicle gear state is not in neutral or parking state.

[0110] The embodiments of the present application also provide corresponding devices and computer storage media for implementing the solutions provided by the embodiments of the present application.

[0111] The device includes a memory and a processor, the memory is used to store instructions or codes, and the processor is used to execute the instructions or codes so that the device executes the method described in any embodiment of the present application.

[0112] The computer storage medium stores codes, and when the codes are executed, a device executing the codes implements the method described in any embodiment of the present application.

[0113] Through the description of the above implementation methods, it can be known that those skilled in the art can clearly understand that all or part of the steps in the above-mentioned embodiment method can be implemented by means of software plus a general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a storage medium, such as a read-only memory (ROM) / RAM, a magnetic disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network communication device such as a router) to execute the methods described in each embodiment of the present application or some parts of the embodiments.

[0114] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0115] It should also be noted that the various embodiments in this specification are described in a progressive manner, and the same and similar parts between the various embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device and apparatus embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiments. The device and apparatus embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components indicated as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0116] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for starting an oil pump motor at low temperature. It is characterized in that The method comprises: Acquire a first oil temperature of an oil pump motor and a vehicle gear position status signal; Determining whether to send an oil pump motor reversal instruction to the vehicle according to the first oil temperature and the vehicle gear state signal; if so, controlling the oil pump motor to reverse; Determine whether the state of the oil pump motor in the reverse state reaches a preset exit condition; if the state of the oil pump motor in the reverse state reaches a first preset exit condition, control the oil pump motor to stop reverse rotation; In response to an oil pump motor forward rotation start instruction, the oil pump motor is controlled to start.

2. The method according to claim 1, It is characterized in that The determining whether to send an oil pump motor reverse direction instruction to the vehicle according to the first oil temperature and the vehicle gear position state signal comprises: determining whether the first oil temperature is within a preset temperature range; determining whether the vehicle gear state signal indicates that the vehicle is in a neutral gear or a parking gear state; When the first oil temperature is within a preset temperature range and the vehicle is in a neutral gear or a parking gear state, an oil pump motor reverse rotation instruction is sent to the vehicle.

3. The method according to claim 1, It is characterized in that The controlling the oil pump motor to reverse comprises: According to the first temperature, searching for a corresponding reversal time in a preset temperature-speed table, and searching for a corresponding reversal speed in a preset temperature-speed table; The oil pump motor is controlled to reverse according to the time and speed obtained from the table.

4. The method according to claim 1, It is characterized in that The method further comprises: If the state of the oil pump motor in the reverse state reaches a second preset exit condition, controlling the oil pump motor to stop reverse rotation; Acquire a second oil temperature of the oil pump motor and a vehicle gear status signal; Whether to send an oil pump motor reverse direction instruction to the vehicle is determined according to the second oil temperature and the vehicle gear state signal.

5. The method according to claim 1, It is characterized in that The first preset exit condition includes: The reverse rotation time of the oil pump motor reaches the preset reverse rotation time.

6. The method according to claim 4, It is characterized in that The second preset exit condition includes: the motor reverse rotation is interrupted, the motor forward rotation command is received, or the vehicle gear state is not in the neutral gear or the parking gear state.

7. A low temperature starting device for an oil pump motor, It is characterized in that The device comprises: An acquisition unit, used for acquiring a first oil temperature of an oil pump motor and a vehicle gear position status signal; a judgment unit, configured to judge whether to send an oil pump motor reverse direction instruction to the vehicle according to the first oil temperature and the vehicle gear state signal; A control unit, used for controlling the oil pump motor to reverse according to the judgment result of the judgment unit; The judging unit is further used to judge whether the state of the oil pump motor in the reverse state reaches a preset exit condition; The control unit is further configured to control the oil pump motor to stop reversing if the state of the oil pump motor in the reversing state reaches a first preset exit condition; and to control the oil pump motor to start in response to a forward start instruction of the oil pump motor.

8. The device according to claim 7, It is characterized in that The control unit is also used for: If the state of the oil pump motor in the reverse state reaches a second preset exit condition, controlling the oil pump motor to stop reverse rotation; The acquisition unit is also used to acquire a second oil temperature of the oil pump motor and a vehicle gear position status signal; The judgment unit is further used to judge whether to send an oil pump motor reverse direction instruction to the vehicle according to the second oil temperature and the vehicle gear state signal.

9. A computing device, It is characterized in that The computing device includes: a memory and a processor; The memory is used to store computer programs; The processor is used to implement the low-temperature starting method of the oil pump motor as described in any one of claims 1 to 6 when executing the computer program.

10. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for low-temperature starting of an oil pump motor according to any one of claims 1 to 6 is implemented.

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