Oil pump control method and device, electronic equipment and vehicle

Abstract

The invention discloses an oil pump control method and device, electronic equipment and a vehicle. The method comprises the steps that in the vehicle running process, according to the running working condition of the vehicle, the target cooling and lubricating flow for cooling and lubricating target parts of the vehicle is determined; according to the target cooling and lubricating flow, the target rotating speed of an oil pump of the vehicle is obtained through calculation; and according to the target rotating speed, an oil pump is controlled to operate, so that the oil pump pumps cooling lubricating liquid in an oil tank of the vehicle into a cooling lubricating pipeline of the target component, and according to the method, the cooling lubricating flow of the component of the vehicle is determined according to the operation working condition. The cooling and lubricating flow in the cooling and lubricating pipeline of the component is matched with the requirement of the component, and the cooling and lubricating effect can be improved.

Description

Technical Field

[0001] This application belongs to the field of vehicle control, and particularly relates to an oil pump control method, device, electronic device, and vehicle. Background Art

[0002] In recent years, compared with traditional fuel vehicles, hybrid vehicles have the advantages of low energy consumption and low usage cost, and are becoming more and more popular among users. In the development of hybrid vehicles, the hybrid transmission is crucial, directly affecting the power transmission, gear engagement, gear shifting, etc. of the vehicle. It is crucial to control the oil pump to meet the normal working oil pressure of the transmission and the cooling and lubrication requirements of the transmission body and the motor.

[0003] Existing hybrid vehicles generally control the oil pump according to the temperature of a certain component (such as a clutch, motor, etc.) of the vehicle. The oil pump pumps the cooling and lubricating fluid in the fuel tank into the cooling and lubricating pipeline, and the cooling and lubricating fluid flows through the pipeline to the components of the vehicle, thereby lubricating the components. At the same time, the cooling and lubricating fluid can absorb the heat generated by these components during operation, playing a role in cooling and lubricating the components. Currently, the flow rate of the cooling and lubricating fluid pumped into the pipeline by the oil pump is fixed, resulting in a mismatch with the cooling and lubricating flow rate required by the components of the vehicle, affecting the cooling and lubricating effect. Summary of the Invention

[0004] Embodiments of this application provide an oil pump control method, device, electronic device, and vehicle, which can determine the cooling and lubricating flow rate of the components of the vehicle according to the operating conditions, so that the cooling and lubricating flow rate in the cooling and lubricating pipeline of the components matches the requirements of the components, and can improve the cooling and lubricating effect.

[0005] In a first aspect, embodiments of this application provide an oil pump control method, and the method includes:

[0006] During the operation of the vehicle, according to the operating conditions of the vehicle, determine the target cooling and lubricating flow rate for cooling and lubricating the target component of the vehicle;

[0007] According to the target cooling and lubricating flow rate, calculate the target speed of the oil pump of the vehicle;

[0008] Control the operation of the oil pump according to the target speed, so that the oil pump pumps the cooling and lubricating fluid in the vehicle fuel tank into the cooling and lubricating pipeline of the target component.

[0009] In an embodiment of this application, the calculating the target speed of the oil pump of the vehicle according to the target cooling and lubricating flow rate includes:

[0010] Obtain the working efficiency of the oil pump;

[0011] Calculate a first rotational speed of the oil pump based on the target cooling and lubrication flow rate and the working efficiency of the oil pump.

[0012] Determine a target rotational speed of the oil pump based on the parameters of the oil pump and the first rotational speed of the oil pump, where the parameters of the oil pump include the chip temperature of the oil pump or the working current of the oil pump.

[0013] In an embodiment of the present application, the parameters of the oil pump include the chip temperature of the oil pump.

[0014] The determining the target rotational speed of the oil pump based on the parameters of the oil pump and the first rotational speed of the oil pump includes:

[0015] Determine a first limit rotational speed of the oil pump as the limit rotational speed corresponding to the oil temperature of the transmission of the vehicle and the chip temperature of the oil pump in a first correspondence relationship, where the first correspondence relationship includes multiple oil temperatures corresponding to the transmission, multiple chip temperatures of the oil pump, and the limit rotational speed jointly corresponding to each oil temperature and each chip temperature.

[0016] Take the smaller value of the first limit rotational speed of the oil pump and the first rotational speed of the oil pump as the target rotational speed of the oil pump.

[0017] In an embodiment of the present application, the parameters of the oil pump include the working current; the determining the target rotational speed of the oil pump based on the parameters of the oil pump and the first rotational speed of the oil pump includes:

[0018] If the duration for which the working current is greater than a first preset current is greater than a first preset duration, then subtract the current upper limit of the oil pump from the working current to obtain a first value, where the first preset current is determined by the current upper limit of the oil pump and a preset overcurrent offset value.

[0019] Multiply the first value by a second value to obtain a third value, where the second value is the rotational speed of the oil pump calculated by a proportional-integral (PI) controller based on the first value, the P-term coefficient of the PI controller, and the I-term coefficient of the PI controller.

[0020] Add the third value to the working rotational speed of the oil pump to obtain a second limit rotational speed of the oil pump.

[0021] Take the smaller value of the second limit rotational speed of the oil pump and the first rotational speed of the oil pump as the target rotational speed of the oil pump.

[0022] In an embodiment of the present application, the determining the target cooling and lubrication flow rate for cooling and lubricating a target component of the vehicle according to the operating conditions of the vehicle includes:

[0023] When the operating condition satisfies the first condition, determine the target cooling and lubricating flow rate according to the first flow rate corresponding to the target component and the opening degree of the flow regulating valve corresponding to the target component, where the first flow rate is determined by the cooling flow rate and the lubricating flow rate required by the target component, and the opening degree of the flow regulating valve is determined by the temperature of the target component and the oil temperature of the vehicle's transmission. The first condition includes: the speed of the vehicle is greater than or equal to a preset speed, and the gear of the vehicle is other than the neutral gear.

[0024] In an embodiment of the present application, the number of the target components is multiple; the determining the target cooling and lubricating flow rate according to the first flow rate corresponding to the target component and the opening degree of the flow regulating valve corresponding to the target component includes:

[0025] For each of the target components, obtain the cooling and lubricating flow rate jointly corresponding to the first flow rate corresponding to the target component and the opening degree of the flow regulating valve corresponding to the target component from the second corresponding relationship. The second corresponding relationship includes multiple first flow rates corresponding to the target component, multiple opening degrees of the flow regulating valve, and the cooling and lubricating flow rate jointly corresponding to each first flow rate and each opening degree of the flow regulating valve;

[0026] Take the maximum value of the obtained cooling and lubricating flow rates as the target cooling and lubricating flow rate.

[0027] In an embodiment of the present application, the first flow rate corresponding to the target component is determined by the following method:

[0028] Determine the cooling flow rate corresponding to the temperature of the target component and the oil temperature of the transmission in the third corresponding relationship as the cooling flow rate required by the target component. The third corresponding relationship includes multiple temperatures corresponding to the target component, multiple oil temperatures corresponding to the transmission, and the cooling flow rate jointly corresponding to each temperature and each oil temperature;

[0029] Add the lubricating flow rate required by the target component to the cooling flow rate required by the target component to obtain the first flow rate corresponding to the target component. The lubricating flow rate required by the target component adopts a preset value.

[0030] In an embodiment of the present application, the number of the target components is multiple; the opening degree of the flow regulating valve corresponding to the target component is determined by the following method:

[0031] For each of the target components, obtain the opening degree of the flow regulating valve corresponding to the temperature of the target component and the oil temperature of the transmission from the fourth corresponding relationship. The fourth corresponding relationship includes multiple temperatures corresponding to the target component, multiple oil temperatures corresponding to the transmission, and the opening degree of the flow regulating valve jointly corresponding to each temperature and each oil temperature;

[0032] Take the maximum of the obtained flow regulating valve openings as the flow regulating valve opening corresponding to each of the target components.

[0033] In an embodiment of the present application, the determining the target cooling and lubricating flow rate for cooling and lubricating the target components of the vehicle according to the operating conditions of the vehicle includes:

[0034] When the operating conditions satisfy the second condition, determine the cooling and lubricating flow rate corresponding to the rotational speed of the motor of the vehicle and the oil temperature of the transmission in the fifth corresponding relationship as the target cooling and lubricating flow rate. The fifth corresponding relationship includes multiple rotational speeds corresponding to the motor, multiple oil temperatures corresponding to the transmission, and the cooling and lubricating flow rate jointly corresponding to each rotational speed and each oil temperature. The second condition includes: the speed of the vehicle is less than a preset speed, and the gear of the vehicle is in neutral.

[0035] In an embodiment of the present application, the determining the target cooling and lubricating flow rate for cooling and lubricating the target components of the vehicle according to the operating conditions of the vehicle includes:

[0036] When the operating conditions satisfy the third condition, determine the preset cooling and lubricating flow rate as the target cooling and lubricating flow rate. The third condition includes: the speed of the vehicle is less than a preset speed, the gear of the vehicle is in neutral, the motor torque of the vehicle is less than a first threshold, and the engine speed of the vehicle is less than a second threshold.

[0037] In a second aspect, an embodiment of the present application provides an oil pump control device, and the device includes:

[0038] A determining module, configured to determine, during the running of the vehicle, a target cooling and lubricating flow rate for cooling and lubricating the target components of the vehicle according to the operating conditions of the vehicle;

[0039] A calculating module, configured to calculate a target rotational speed of the oil pump of the vehicle according to the target cooling and lubricating flow rate;

[0040] A control module, configured to control the operation of the oil pump according to the target rotational speed, so that the oil pump pumps the cooling and lubricating liquid in the vehicle fuel tank into the cooling and lubricating pipeline of the target components.

[0041] In a third aspect, an embodiment of the present application provides an electronic device, including: a processor and a memory storing computer program instructions;

[0042] When the processor executes the computer program instructions, the oil pump control method described in the first aspect is implemented.

[0043] Fourthly, an embodiment of the present application provides a vehicle, including the electronic device described in the third aspect.

[0044] Fourthly, an embodiment of the present application provides a computer-readable storage medium, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the oil pump control method described in the first aspect is implemented.

[0045] Fifthly, an embodiment of the present application provides a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device is enabled to execute the oil pump control method described in the first aspect.

[0046] In the oil pump control method, device, electronic device and vehicle according to the embodiments of the present application, during the operation of the vehicle, according to the operating conditions of the vehicle, the target cooling and lubricating flow rate for cooling and lubricating the target components of the vehicle is determined; according to the target cooling and lubricating flow rate, the target speed of the oil pump of the vehicle is calculated; and the operation of the oil pump is controlled according to the target speed, so that the oil pump pumps the cooling and lubricating liquid in the vehicle fuel tank into the cooling and lubricating pipeline of the target component. Determining the cooling and lubricating flow rate of the components of the vehicle according to the operating conditions and matching the cooling and lubricating flow rate in the cooling and lubricating pipeline of the components with the requirements of the components can improve the cooling and lubricating effect. Description of the Drawings

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0048] Figure 1 is a flowchart of the oil pump control method provided by an embodiment of the present application;

[0049] Figure 2 is a schematic diagram of cooling and lubrication provided by an embodiment of the present application;

[0050] Figure 3 is another flowchart of the oil pump control method provided by an embodiment of the present application;

[0051] Figure 4 is a schematic structural diagram of the oil pump control device provided by an embodiment of the present application;

[0052] Figure 5 is a schematic structural diagram of the electronic device provided by an embodiment of the present application. Detailed Embodiments

[0053] The features and exemplary embodiments of various aspects of the present application will be described in detail below. To make the objectives, technical solutions, and advantages of the present application more clear and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than limiting the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0054] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements that are inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "comprising..." does not exclude the existence of additional identical elements in the process, method, article, or device comprising the said element.

[0055] To solve the problems of the prior art, embodiments of the present application provide an oil pump control method, apparatus, electronic device, and vehicle. First, the oil pump control method provided by the embodiments of the present application will be introduced below.

[0056] Figure 1 The flowchart of the oil pump control method provided by an embodiment of the present application is shown. As Figure 1 shown, the oil pump control method provided by the embodiments of the present application is applied to an electronic device and includes the following steps 101 - step 103, where:

[0057] Step 101, during the running of the vehicle, determine the target cooling and lubricating flow rate for cooling and lubricating the target components of the vehicle according to the running conditions of the vehicle.

[0058] In this embodiment, during the running of the vehicle, determine the running conditions of the vehicle, and thus determine the target cooling and lubricating flow rate for cooling and lubricating the target components of the vehicle according to the running conditions of the vehicle. Among them, the running conditions of the vehicle are determined according to the speed and gear of the vehicle, etc.

[0059] Step 102, calculate the target speed of the oil pump of the vehicle according to the target cooling and lubricating flow rate.

[0060] In this embodiment, the target rotational speed of the oil pump is calculated based on the target cooling lubrication flow rate and the working efficiency of the oil pump of the vehicle. The oil pump is a double pump, including a high-pressure oil pump and a low-pressure oil pump. The working efficiency of the oil pump includes the working efficiency of the high-pressure oil pump and the working efficiency of the low-pressure oil pump. The working efficiency of the oil pump used in calculating the target rotational speed of the oil pump of the vehicle is the working efficiency of the low-pressure oil pump.

[0061] Step 103: Control the operation of the oil pump according to the target rotational speed, so that the oil pump pumps the cooling lubricant in the vehicle fuel tank into the cooling lubrication pipeline of the target component.

[0062] In this embodiment, the operation of the oil pump is controlled according to the target rotational speed, so that the oil pump pumps the cooling lubricant in the vehicle fuel tank into the cooling lubrication pipeline of the target component. The cooling lubricant flows through the cooling lubrication pipeline to the target component, thereby cooling and lubricating the target component.

[0063] In this embodiment, during the operation of the vehicle, according to the operating conditions of the vehicle, the target cooling lubrication flow rate for cooling and lubricating the target components of the vehicle is determined. The target rotational speed of the oil pump of the vehicle is calculated based on the target cooling lubrication flow rate. The operation of the oil pump is controlled according to the target rotational speed, so that the oil pump pumps the cooling lubricant in the vehicle fuel tank into the cooling lubrication pipeline of the target component, thereby cooling and lubricating the target component. Determining the cooling lubrication flow rate of the components of the vehicle according to the operating conditions and making the cooling lubrication flow rate in the cooling lubrication pipeline of the components match the requirements of the components can improve the cooling and lubrication effect, timely remove heat, keep each component within a suitable temperature range, avoid performance degradation or failure caused by overheating, thereby ensuring the stable and efficient operation of the equipment, reducing unnecessary waste, and improving the cooling and lubrication effect.

[0064] In an embodiment of the present application, step 102: Calculating the target rotational speed of the oil pump of the vehicle according to the target cooling lubrication flow rate includes:

[0065] Obtain the working efficiency of the oil pump;

[0066] Calculate the first rotational speed of the oil pump according to the target cooling lubrication flow rate and the working efficiency of the oil pump;

[0067] Determine the target rotational speed of the oil pump according to the parameters of the oil pump and the first rotational speed of the oil pump. The parameters of the oil pump include the chip temperature of the oil pump or the working current of the oil pump.

[0068] Specifically, refer to Figure 2, a double-pump can be adopted. The double-pump includes a low-pressure oil pump 201 and a high-pressure oil pump 202. Among them, the low-pressure oil pump 201 is respectively connected to the first motor 206, the second motor 207, and a flow regulating valve (ACS valve 217). The low-pressure oil pump 201 is used to pump the cooling and lubricating fluid in the vehicle fuel tank into the cooling and lubricating pipeline of the target components. At this time, the ACS valve 217 is opened. Among them, the target components include the first motor 206, the second motor 207, the first clutch 208, the second clutch 209, the third clutch 210, the fourth clutch 211, the front bearing 212, the rear bearing 213, the rear planet carrier 214, the planetary gear sun gear 215, and the front planet carrier 216. Among them, the high-pressure oil pump 202 is connected to the accumulator 204 through an on / off valve 203. The high-pressure oil pump 202 is used to fill the accumulator 204 with oil. The accumulator 204 is used to supply oil to multiple clutches, including the first clutch, the second clutch, the third clutch, and the fourth clutch.

[0069] The high-pressure required flow rate of the above-mentioned high-pressure oil pump 202 is as follows:

[0070] When the low-energy consumption working condition is satisfied, the flow rate of the high-pressure oil pump 202 is 0; when the accumulator 204 needs to build pressure, for example, the pressure building condition is that the main oil pressure sensor 205 detects that the pressure is less than the preset pressure, the on / off valve 203 is controlled to close, and the flow rate of the high-pressure oil pump 202 is used to build pressure for the accumulator 204. The high-pressure flow rate of the high-pressure oil pump 202 can be set to x L / min. At this time, only the low-pressure oil pump 201 cools and lubricates the above-mentioned target components. When the accumulator 204 does not need to build pressure, the on / off valve 203 is controlled to open, and the high-pressure flow rate of the high-pressure oil pump 202 can be set to 2x L / min. At this time, part of the lubricating flow rate of the above-mentioned target components comes from the high-pressure oil pump 202, and x can be set according to the actual situation.

[0071] If the rotational speed of the oil pump is too high, its internal components such as gears and blades will rub and impact each other at a faster speed. Being in this high-load state for a long time will cause component wear and shorten the service life of the oil pump. Therefore, it is necessary to limit the rotational speed of the oil pump. Specifically, obtain the working efficiency of the oil pump, look up the table according to the working rotational speed of the low-pressure oil pump and the oil temperature of the transmission, and obtain the working efficiency of the oil pump corresponding to the working rotational speed of the oil pump and the oil temperature of the transmission. Calculate the first rotational speed of the oil pump according to the working efficiency of the oil pump and the target cooling and lubricating flow rate. Specifically, divide the target cooling and lubricating flow rate by the working efficiency of the oil pump, that is, the working efficiency of the low-pressure oil pump, to obtain the first rotational speed of the oil pump. Use the parameters of the oil pump to limit the first rotational speed of the oil pump to obtain the target rotational speed of the oil pump. The parameters of the oil pump include the chip temperature of the oil pump or the working current of the oil pump.

[0072] It should be noted that the working efficiency of the high-pressure end oil pump can also be obtained by looking up a table based on the working speed at the high-pressure end and the oil temperature of the transmission, so as to obtain the working efficiency of the oil pump corresponding to both the working speed of the oil pump and the oil temperature of the transmission.

[0073] By restricting the speed, the friction frequency between components can be reduced, wear can be decreased, and the service life of the oil pump can be extended. Since the oil pump speed directly affects its flow rate and pressure output, too high a speed will cause the flow rate and pressure fluctuations to increase, making it difficult to meet the stable requirements of the vehicle system. Restricting the speed can keep the fluid flow rate and pressure output by the oil pump within a reasonable and stable range, ensuring continuous and reliable power support for the vehicle system.

[0074] In an embodiment of the present application, the parameters of the oil pump include the chip temperature of the oil pump; determining the target speed of the oil pump according to the parameters of the oil pump and the first speed of the oil pump includes:

[0075] Determining the restricted speed corresponding to the oil temperature of the transmission of the vehicle and the chip temperature of the oil pump in the first correspondence relationship as the first restricted speed of the oil pump, where the first correspondence relationship includes multiple oil temperatures corresponding to the transmission, multiple chip temperatures of the oil pump, and the restricted speed corresponding to each oil temperature and each chip temperature;

[0076] Taking the smaller value between the first restricted speed of the oil pump and the first speed of the oil pump as the target speed of the oil pump.

[0077] In this embodiment, the first correspondence relationship is preset in advance. The first correspondence relationship includes multiple oil temperatures corresponding to the transmission, multiple chip temperatures of the oil pump, and the restricted speed corresponding to each oil temperature and each chip temperature. Determining the restricted speed corresponding to the oil temperature of the transmission of the vehicle and the chip temperature of the oil pump in the first correspondence relationship as the first restricted speed of the oil pump, comparing the first restricted speed of the oil pump with the first speed of the oil pump, and taking the smaller value between the first restricted speed of the oil pump and the first speed of the oil pump as the target speed of the oil pump.

[0078] When the chip temperature rises, it indicates that the oil pump may be in a state of high-load operation or poor heat dissipation, etc. Restricting the speed of the oil pump, reducing the workload and heat generation of the oil pump, and lowering the chip temperature. By restricting the speed, the fluid flow rate and pressure output by the oil pump can be kept within a reasonable and stable range, ensuring continuous and reliable power support for the vehicle system without affecting the cooling and lubrication effects.

[0079] In an embodiment of the present application, the parameters of the oil pump include the working current, and determining the target speed of the oil pump according to the parameters of the oil pump and the first speed of the oil pump includes:

[0080] If the duration for which the working current is greater than the first preset current is greater than the first preset duration, subtract the current upper limit of the oil pump from the working current to obtain a first value, where the first preset current is determined by the current upper limit of the oil pump and a preset overcurrent bias value;

[0081] Multiply the first value by a second value to obtain a third value, where the second value is the rotational speed of the oil pump calculated by a proportional-integral (PI) controller based on the first value, the P-term coefficient of the PI controller, and the I-term coefficient of the PI controller;

[0082] Add the third value to the working rotational speed of the oil pump to obtain the second limiting rotational speed of the oil pump;

[0083] Take the smaller of the second limiting rotational speed of the oil pump and the first rotational speed of the oil pump as the target rotational speed of the oil pump.

[0084] In this embodiment, if the duration for which the working current of the oil pump is greater than the first preset current is greater than the first preset duration, subtract the current upper limit of the oil pump from the working current of the oil pump to obtain a first value, and multiply the first value by a second value to obtain a third value, where the second value is the rotational speed of the oil pump calculated by a PI controller based on the first value, the P-term coefficient, and the I-term coefficient. The PI controller includes two main parts, proportional control (P) and integral control (I). Specifically, multiply the first value by the P-term coefficient to obtain a first intermediate value, multiply the first value by the I-term coefficient to obtain a second intermediate value, and add the first value and the second intermediate value to obtain the second value.

[0085] Add the third value to the working rotational speed of the oil pump to obtain the second limiting rotational speed of the oil pump. The working rotational speed of the oil pump is the current actual rotational speed. Compare the second limiting rotational speed of the oil pump with the first rotational speed of the oil pump, and take the smaller of the second limiting rotational speed of the oil pump and the first rotational speed of the oil pump as the target rotational speed of the oil pump, as specifically shown below:

[0086] S1 = S2 + (I1 - I max ) × S3 (1)

[0087] where S1 is the second limiting rotational speed, S2 is the working rotational speed of the oil pump, I1 is the working current of the oil pump, I max is the current upper limit of the oil pump, and S3 is the rotational speed of the oil pump calculated by the PI controller based on the first value, the P-term coefficient, and the I-term coefficient.

[0088] The first preset current is determined based on the current upper limit of the oil pump and a preset overcurrent bias value. Specifically, add the current upper limit of the oil pump and the preset overcurrent bias value to obtain the first preset current.

[0089] There is a certain relationship between the current magnitude of the oil pump and the load. When the load of the oil pump increases, the oil pump motor needs to output a greater torque, resulting in an increase in current. By the magnitude and duration of the current, the rotational speed of the oil pump is adjusted. Without affecting the cooling and lubrication effect, the normal operation of the oil pump is ensured.

[0090] In an embodiment of the present application, specifically, in step 101, according to the operating condition of the vehicle, determining a target cooling and lubrication flow rate for a target component of the vehicle includes:

[0091] When the operating condition satisfies the first condition, according to the first flow rate corresponding to the target component and the opening degree of the flow rate regulating valve corresponding to the target component, determining the target cooling and lubrication flow rate, where the first flow rate is determined by the cooling flow rate and lubrication flow rate required by the target component, and the opening degree of the flow rate regulating valve is determined by the temperature of the target component and the oil temperature of the vehicle's transmission. The first condition includes: the speed of the vehicle is greater than or equal to a preset speed, and the gear of the vehicle is other than the neutral gear.

[0092] In this embodiment, it is determined whether the operating condition satisfies the first condition or the second condition or the third condition. The first condition corresponds to a high-power consumption condition, the second condition corresponds to a low-power consumption condition, and the third condition corresponds to a zero-power consumption condition. Among them, the first condition includes that the speed of the vehicle is greater than or equal to a preset speed, and the gear of the vehicle is other than the neutral gear. When the speed of the vehicle is greater than or equal to the preset speed and the gear of the vehicle is other than the neutral gear, it indicates that the operating condition of the vehicle is a high-power consumption condition. In this case, according to the cooling flow rate and lubrication flow rate required by the target component, determining the first flow rate corresponding to the target component, and according to the temperature of the target component and the oil temperature of the vehicle's transmission, determining the opening degree of the flow rate regulating valve corresponding to the target component. Further, according to the first flow rate corresponding to the target component and the opening degree of the flow rate regulating valve corresponding to the target component, determining the target cooling and lubrication flow rate.

[0093] In the case of a high-power consumption condition, obtaining the target cooling flow rate according to the opening degree of the flow rate regulating valve corresponding to the target component and the cooling and lubrication flow rate can accurately match the actual requirements under different conditions and ensure the cooling and lubrication effect.

[0094] In an embodiment of the present application, the number of the target components is multiple; the determining the target cooling and lubrication flow rate according to the first flow rate corresponding to the target component and the opening degree of the flow rate regulating valve corresponding to the target component includes:

[0095] For each of the target components, obtain the cooling lubrication flow rate corresponding to the first flow rate corresponding to the target component and the opening degree of the flow regulating valve corresponding to the target component from the second correspondence relationship. The second correspondence relationship includes multiple first flow rates corresponding to the target component, multiple opening degrees of the flow regulating valve, and the cooling lubrication flow rate corresponding to each first flow rate and each opening degree of the flow regulating valve;

[0096] Take the maximum value among the obtained cooling lubrication flow rates as the target cooling lubrication flow rate.

[0097] Among them, the number of multiple target components is multiple. For each target component, obtain the cooling lubrication flow rate from the second correspondence relationship. The second correspondence relationship includes multiple first flow rates corresponding to the target component, multiple opening degrees of the flow regulating valve, and the cooling lubrication flow rate corresponding to each first flow rate and each opening degree of the flow regulating valve. Obtain the cooling lubrication flow rate corresponding to the target component corresponding to the first flow rate corresponding to the target component and the opening degree of the flow regulating valve corresponding to the target component from the second correspondence relationship, and take the maximum cooling lubrication flow rate among the obtained multiple cooling lubrication flow rates as the target cooling lubrication flow rate.

[0098] Determine the cooling lubrication flow rate of each target component based on the preset correspondence relationship and the required flow rate and valve opening conditions of each target component, and select the larger one from multiple cooling lubrication flow rates, so as to meet the cooling lubrication requirements of each target component.

[0099] In an embodiment of the present application, the first flow rate corresponding to the target component is determined by the following method:

[0100] Determine the cooling flow rate corresponding to the temperature of the target component and the oil temperature of the transmission in the third correspondence relationship as the cooling flow rate required by the target component. The third correspondence relationship includes multiple temperatures corresponding to the target component, multiple oil temperatures corresponding to the transmission, and the cooling flow rate corresponding to each temperature and each oil temperature;

[0101] Add the lubrication flow rate required by the target component to the cooling flow rate required by the target component to obtain the first flow rate corresponding to the target component. The lubrication flow rate required by the target component adopts a preset value.

[0102] In this embodiment, a third correspondence is preset. The third correspondence includes multiple temperatures corresponding to the target component, multiple oil temperatures corresponding to the transmission, and the cooling flow rate jointly corresponding to each temperature and each oil temperature. The cooling flow rate corresponding to the temperature of the target component and the oil temperature of the transmission in the third correspondence is determined as the cooling flow rate required by the target component. Further, the lubrication flow rate required by the target component and the cooling flow rate required by the target component are added together to obtain the first flow rate corresponding to the target component, where the lubrication flow rate required by the target component is preset.

[0103] By determining the cooling flow rate required by the target component through the preset correspondence and the required temperature conditions of the target component and the temperature conditions of the transmission, and then combining the lubrication flow rate to determine the lubrication and cooling flow rate of the target component, the demand can be determined according to the actual situation of the target component.

[0104] In an embodiment of the present application, the number of the target components is multiple; the opening degree of the flow regulating valve corresponding to the target component is determined by the following method:

[0105] For each of the target components, obtain the opening degree of the flow regulating valve corresponding to the temperature of the target component and the oil temperature of the transmission from the fourth correspondence. The fourth correspondence includes multiple temperatures corresponding to the target component, multiple oil temperatures corresponding to the transmission, and the opening degree of the flow regulating valve jointly corresponding to each temperature and each oil temperature;

[0106] Take the largest one among the obtained opening degrees of the flow regulating valves as the opening degree of the flow regulating valve corresponding to each of the target components.

[0107] In this embodiment, a fourth correspondence is preset. The fourth correspondence includes multiple temperatures corresponding to the target component, multiple oil temperatures corresponding to the transmission, and the opening degree of the flow regulating valve jointly corresponding to each temperature and each oil temperature. For each of the target components, obtain the opening degree of the flow regulating valve corresponding to the temperature of the target component and the oil temperature of the transmission from the fourth correspondence, and select the largest opening degree of the flow regulating valve from multiple opening degrees of the flow regulating valves as the opening degree of the flow regulating valve corresponding to the target component.

[0108] By determining the opening degrees of the flow regulating valves of each target component through the preset correspondence and the temperature conditions of each target component and the temperature conditions of the transmission, and selecting the larger one from multiple opening degrees of the flow regulating valves, the demands of each target component can be met.

[0109] In an embodiment of the present application, in step 101, the determining the target cooling and lubrication flow rate for cooling and lubricating the target component of the vehicle according to the operating condition of the vehicle includes:

[0110] When the operating condition satisfies the second condition, determine the cooling and lubrication flow rate corresponding to the rotational speed of the motor of the vehicle and the oil temperature of the transmission in the fifth correspondence relationship as the target cooling and lubrication flow rate. The fifth correspondence relationship includes multiple rotational speeds corresponding to the motor, multiple oil temperatures corresponding to the transmission, and the cooling and lubrication flow rate corresponding to each rotational speed and each oil temperature. The second condition includes: the speed of the vehicle is less than a preset speed, and the gear of the vehicle is in neutral.

[0111] In this embodiment, the second condition corresponds to a low power consumption operating condition. The second condition includes that the speed of the vehicle is less than a preset speed, and the gear of the vehicle is in neutral. When the speed of the vehicle is less than the preset speed and the gear of the vehicle is in neutral, it indicates that the operating condition of the vehicle is a low power consumption operating condition. In this case, directly determine the target cooling and lubrication flow rate from the fifth correspondence relationship. The fifth correspondence relationship includes multiple rotational speeds corresponding to the motor of the vehicle, multiple oil temperatures corresponding to the transmission, and the cooling and lubrication flow rate corresponding to each rotational speed and each oil temperature; determine the cooling and lubrication flow rate corresponding to the rotational speed of the motor of the vehicle and the oil temperature of the transmission in the fifth correspondence relationship as the target cooling and lubrication flow rate.

[0112] In the case of a low power consumption operating condition, obtaining the target cooling flow rate for the rotational speed of the motor of the vehicle and the oil temperature of the transmission can accurately match the actual requirements under different operating conditions and ensure the cooling and lubrication effect.

[0113] In an embodiment of the present application, step 101, the determining the target cooling and lubrication flow rate for cooling and lubricating the target component of the vehicle according to the operating condition of the vehicle includes:

[0114] When the operating condition satisfies the third condition, determine the preset cooling and lubrication flow rate as the target cooling and lubrication flow rate. The third condition includes: the speed of the vehicle is less than a preset speed, the gear of the vehicle is in neutral, the motor torque of the vehicle is less than a first threshold, and the engine speed of the vehicle is less than a second threshold.

[0115] In this embodiment, the third condition corresponds to a zero power consumption operating condition. The third condition includes that the speed of the vehicle is less than a preset speed, the gear of the vehicle is in neutral, the motor torque of the vehicle is less than a first threshold, and the engine speed of the vehicle is less than a second threshold. When the speed of the vehicle is less than the preset speed, the gear of the vehicle is in neutral, the motor torque of the vehicle is less than the first threshold, and the engine speed of the vehicle is less than the second threshold, it indicates that the operating condition of the vehicle is a zero power consumption operating condition, and directly determine the pre-set cooling and lubrication flow rate as the target cooling and lubrication flow rate.

[0116] Optionally, when the operating condition satisfies a fourth condition, a preset cooling and lubricating flow rate is determined as the target cooling and lubricating flow rate. The fourth condition includes that the speed of the vehicle is less than a preset speed, the gear of the vehicle is in neutral, the motor torque of the vehicle is less than a first threshold, the engine speed of the vehicle is less than a second threshold, and the high-voltage relay of the vehicle's battery is disconnected.

[0117] In this embodiment, the fourth condition corresponds to a zero-power consumption condition. The fourth condition includes that the speed of the vehicle is less than a preset speed, the gear of the vehicle is in neutral, the motor torque of the vehicle is less than a first threshold, the engine speed of the vehicle is less than a second threshold, and the high-voltage relay of the vehicle's battery is disconnected. When the speed of the vehicle is less than a preset speed, the gear of the vehicle is in neutral, the motor torque of the vehicle is less than a first threshold, the engine speed of the vehicle is less than a second threshold, and the high-voltage relay of the battery is disconnected, it indicates that the operating condition of the vehicle is a zero-power consumption condition, and the preset cooling and lubricating flow rate is directly determined as the target cooling and lubricating flow rate.

[0118] Optionally, when the operating condition satisfies a fifth condition, a preset cooling and lubricating flow rate is determined as the target cooling and lubricating flow rate. The fifth condition includes that the speed of the vehicle is less than a preset speed, the gear of the vehicle is in neutral, the motor torque of the vehicle is less than a first threshold, the engine speed of the vehicle is less than a second threshold, the high-voltage relay of the vehicle's battery is closed, and the driving cycle mode of the vehicle is not activated.

[0119] In this embodiment, the fourth condition corresponds to a zero-power consumption condition. The fifth condition includes that the speed of the vehicle is less than a preset speed, the gear of the vehicle is in neutral, the motor torque of the vehicle is less than a first threshold, the engine speed of the vehicle is less than a second threshold, the high-voltage relay of the vehicle's battery is closed, and the driving cycle mode of the vehicle is not activated. When the speed of the vehicle is less than a preset speed, the gear of the vehicle is in neutral, the motor torque of the vehicle is less than a first threshold, the engine speed of the vehicle is less than a second threshold, the high-voltage relay of the vehicle's battery is closed, and the driving cycle mode of the vehicle is not activated, it indicates that the operating condition of the vehicle is a zero-power consumption condition, and the preset cooling and lubricating flow rate is directly determined as the target cooling and lubricating flow rate. The above preset cooling and lubricating flow rate is 0.

[0120] In the case of a zero-power consumption condition, directly using the preset value as the target cooling and lubricating flow rate can accurately match the actual requirements under different conditions and ensure the cooling and lubricating effect.

[0121] The following is an example of the oil pump control method provided by the embodiments of the present application.

[0122] Step 301, determine whether the high-power consumption condition is satisfied.

[0123] In this embodiment, during the operation of the vehicle, according to the operating conditions of the vehicle, it is determined whether the high-power consumption condition is met. If the speed of the vehicle is greater than or equal to the preset speed and the gear of the vehicle is a gear other than the neutral gear (i.e., the first condition in the above text), it is determined that the high-power consumption condition is met; if the above conditions are not met, it is necessary to determine whether the low-power consumption condition is met.

[0124] Step 302, when the high-power consumption is satisfied, determine the target cooling and lubrication flow rate.

[0125] In this embodiment, when the high-power consumption is satisfied (i.e., when the operating conditions meet the first condition in the above text), the target cooling and lubrication flow rate is determined. Specifically, according to the first flow rate corresponding to the target component and the opening degree of the flow rate regulating valve corresponding to the target component, the target cooling and lubrication flow rate is determined.

[0126] Among them, the first flow rate corresponding to the target component is determined by the following method:

[0127] The cooling flow rate corresponding to the temperature of the target component and the oil temperature of the transmission in the third correspondence relationship is determined as the cooling flow rate required by the target component. The third correspondence relationship includes multiple temperatures corresponding to the target component, multiple oil temperatures corresponding to the transmission, and the cooling flow rate jointly corresponding to each temperature and each oil temperature; the lubrication flow rate required by the target component is added to the cooling flow rate required by the target component to obtain the first flow rate corresponding to the target component, and the lubrication flow rate required by the target component adopts a preset value.

[0128] In this embodiment, in this embodiment, the third correspondence relationship is preset. The third correspondence relationship includes multiple temperatures corresponding to the target component, multiple oil temperatures corresponding to the transmission, and the cooling flow rate jointly corresponding to each temperature and each oil temperature. The cooling flow rate corresponding to the temperature of the target component and the oil temperature of the transmission in the third correspondence relationship is determined as the cooling flow rate required by the target component. Further, the lubrication flow rate required by the target component and the cooling flow rate required by the target component are added together to obtain the first flow rate corresponding to the target component, where the lubrication flow rate required by the target component is preset.

[0129] Among them, the opening degree of the flow rate regulating valve corresponding to the target component is determined by the following method:

[0130] For each of the target components, obtain the opening degree of the flow rate regulating valve corresponding to the temperature of the target component and the oil temperature of the transmission from the fourth correspondence relationship. The fourth correspondence relationship includes multiple temperatures corresponding to the target component, multiple oil temperatures corresponding to the transmission, and the opening degree of the flow rate regulating valve jointly corresponding to each temperature and each oil temperature;

[0131] Take the maximum of the obtained flow control valve openings as the flow control valve opening corresponding to each of the target components.

[0132] In this embodiment, a fourth correspondence is preset. The fourth correspondence includes multiple temperatures corresponding to the target components, multiple oil temperatures corresponding to the transmission, and the flow control valve opening jointly corresponding to each temperature and each oil temperature. For each of the target components, obtain the flow control valve opening corresponding to the temperature of the target component and the oil temperature of the transmission from the fourth correspondence, and select the maximum flow control valve opening from the multiple flow control valve openings as the flow control valve opening corresponding to the target component.

[0133] Alternatively, if the sum of the flow control valve openings corresponding to the first motor and the flow control valve openings corresponding to multiple clutches, select the larger one. If the larger one ≥ the first opening, where the first opening is the difference between 100% and the flow control valve opening corresponding to the second motor, then take the above larger one as the flow control valve opening corresponding to the target component; if the larger one < the first opening, then take the flow control valve opening of the second motor as the final flow control valve opening corresponding to the target component, which is used as the flow control valve opening when calculating the target cooling and lubricating flow rate subsequently. That is, give priority to allocating to the clutch and the first motor because the clutch temperature is prone to overheating, but when the temperature of the second motor is high, give priority to allocating to the second motor.

[0134] Among them, the number of target components is multiple; determining the target cooling and lubricating flow rate according to the first flow rate corresponding to the target component and the flow control valve opening corresponding to the target component includes:

[0135] The determining the target cooling and lubricating flow rate according to the first flow rate corresponding to the target component and the flow control valve opening corresponding to the target component includes:

[0136] For each of the target components, obtain the cooling and lubricating flow rate jointly corresponding to the first flow rate corresponding to the target component and the flow control valve opening corresponding to the target component from the second correspondence. The second correspondence includes multiple first flow rates corresponding to the target components, multiple flow control valve openings, and the cooling and lubricating flow rate jointly corresponding to each first flow rate and each flow control valve opening;

[0137] Take the maximum of the obtained cooling and lubricating flow rates as the target cooling and lubricating flow rate.

[0138] In this embodiment, the number of target components is multiple, including: the first motor, the second motor, the first clutch, the second clutch, the third clutch, and the fourth clutch, etc.

[0139] For each target component, obtain the cooling lubrication flow rate from the second corresponding relationship. The second corresponding relationship includes multiple first flow rates corresponding to the target component, multiple opening degrees of the flow regulating valves, and the cooling lubrication flow rate corresponding to each combination of a first flow rate and an opening degree of a flow regulating valve. Obtain the cooling lubrication flow rate corresponding to the target component from the second corresponding relationship, which is the cooling lubrication flow rate corresponding to the combination of the first flow rate corresponding to the target component and the opening degree of the flow regulating valve corresponding to the target component. Take the maximum cooling lubrication flow rate among the obtained multiple cooling lubrication flow rates as the target cooling lubrication flow rate.

[0140] Step 303, determine whether the low-power operating condition is satisfied.

[0141] In this embodiment, when the high-power condition is not satisfied, according to the operating condition of the vehicle, determine whether the low-power operating condition is satisfied. If the speed of the vehicle is less than the preset speed and the gear of the vehicle is in neutral, it is determined that the low-power operating condition is satisfied; if the speed of the vehicle is less than the preset speed, the gear of the vehicle is in neutral, the motor torque of the vehicle is less than the first threshold, and the engine speed of the vehicle is less than the second threshold, then the zero-power operating condition is satisfied.

[0142] Step 304, when the low-power condition is satisfied, determine the target cooling lubrication flow rate.

[0143] In this embodiment, when the low-power condition is satisfied, the cooling lubrication flow rate corresponding to the speed of the motor of the vehicle and the oil temperature of the transmission in the fifth corresponding relationship is determined as the target cooling lubrication flow rate (that is, in the case where the operating condition satisfies the second condition as described above, the cooling lubrication flow rate corresponding to the speed of the motor of the vehicle and the oil temperature of the transmission in the fifth corresponding relationship is determined as the target cooling lubrication flow rate). The fifth corresponding relationship includes multiple speeds corresponding to the motor, multiple oil temperatures corresponding to the transmission, and the cooling lubrication flow rate corresponding to each combination of a speed and an oil temperature.

[0144] Step 305, when the zero-power condition is satisfied, determine the target cooling lubrication flow rate.

[0145] In this embodiment, when the zero-power condition is satisfied, the preset cooling lubrication flow rate is determined as the target cooling lubrication flow rate (that is, in the case where the operating condition satisfies the third condition as described above, the preset cooling lubrication flow rate is determined as the target cooling lubrication flow rate).

[0146] Step 306, calculate the target speed of the oil pump of the vehicle according to the target cooling lubrication flow rate.

[0147] In this embodiment, the working efficiency of the oil pump is obtained. Specifically, according to the working speed of the oil pump and the oil temperature of the transmission, the working efficiency of the oil pump is obtained by looking up a table. According to the target cooling and lubrication flow rate and the working efficiency of the oil pump, the first speed of the oil pump is calculated, and the first speed is limited to obtain the target speed of the oil pump.

[0148] Specifically, the first speed of the oil pump is limited according to the parameters of the oil pump to obtain the target speed of the oil pump (that is, according to the parameters of the oil pump and the first speed of the oil pump in the above text, the target speed of the oil pump is determined). Among them, the parameters of the oil pump include the chip temperature of the oil pump or the working current of the oil pump.

[0149] Optionally, limiting the first speed of the oil pump according to the parameters of the oil pump to obtain the target speed of the oil pump includes:

[0150] Determine the limited speed corresponding to the oil temperature of the vehicle's transmission and the chip temperature of the oil pump in the first correspondence relationship as the first limited speed of the oil pump. The first correspondence relationship includes multiple oil temperatures corresponding to the transmission, multiple chip temperatures of the oil pump, and the limited speed jointly corresponding to each oil temperature and each chip temperature;

[0151] Take the smaller of the first limited speed of the oil pump and the first speed of the oil pump as the target speed of the oil pump.

[0152] In this embodiment, the first correspondence relationship is preset. The first correspondence relationship includes multiple oil temperatures corresponding to the transmission, multiple chip temperatures of the oil pump, and the limited speed jointly corresponding to each oil temperature and each chip temperature. Determine the limited speed corresponding to the oil temperature of the vehicle's transmission and the chip temperature of the oil pump in the first correspondence relationship as the first limited speed of the oil pump. Compare the first limited speed of the oil pump with the first speed of the oil pump, and take the smaller of the first limited speed of the oil pump and the first speed of the oil pump as the target speed of the oil pump.

[0153] Optionally, limiting the first speed of the oil pump according to the parameters of the oil pump to obtain the target speed of the oil pump includes:

[0154] If the duration for which the working current is greater than the first preset current is greater than the first preset duration, then subtract the current upper limit of the oil pump from the working current to obtain a first value, where the first preset current is determined by the current upper limit of the oil pump and a preset overcurrent offset value;

[0155] Multiply the first value by a second value to obtain a third value. The second value is the oil pump speed calculated by a PI controller according to the first value, the P-term coefficient of the PI controller, and the I-term coefficient of the PI controller.

[0156] Add the third value to the operating speed of the oil pump to obtain the second limiting speed of the oil pump;

[0157] Take the smaller value between the second limiting speed of the oil pump and the first speed of the oil pump as the target speed of the oil pump.

[0158] In this embodiment, if the duration for which the operating current of the oil pump is greater than the first preset current is greater than the first preset duration, subtract the current upper limit of the oil pump from the operating current of the oil pump to obtain a first value, multiply the first value by a second value, and the second value is the oil pump speed calculated by a PI controller according to the first value, the P-term coefficient of the PI controller, and the I-term coefficient of the PI controller. Add the third value to the operating speed of the oil pump to obtain the second limiting speed of the oil pump. The operating speed of the oil pump is the current actual speed. Compare the second limiting speed of the oil pump with the first speed of the oil pump, and take the smaller value between the second limiting speed of the oil pump and the first speed of the oil pump as the target speed of the oil pump. For details, see Equation (1).

[0159] Step 307: Control the operation of the oil pump according to the target speed, so that the oil pump pumps the cooling and lubricating fluid in the vehicle fuel tank into the cooling and lubricating pipeline of the target component.

[0160] In this embodiment, control the operation of the oil pump according to the target speed, so that the oil pump pumps the cooling and lubricating fluid in the vehicle fuel tank into the cooling and lubricating pipeline of the target component. The cooling and lubricating fluid flows through the cooling and lubricating pipeline to the target component, thereby cooling and lubricating the target component.

[0161] The oil pump control method provided in the embodiment of the present application takes into account different power consumption conditions, obtains the adapted target cooling and lubricating flow rate through low power consumption conditions, zero power consumption conditions, and high power consumption conditions, and obtains the speed of the oil pump according to the oil pump efficiency and the target cooling and lubricating flow rate. The present invention proposes that the speed of the oil pump needs to be limited according to the oil pump temperature and the chip temperature, and at the same time, the speed of the oil pump is limited by PI control when the oil pump current exceeds the maximum current to obtain the final speed of the oil pump, so as to achieve the purpose of controlling the oil pump. Improve the safety and reliability of vehicle operation.

[0162] Figure 4 Shows the structural diagram of the oil pump control device provided in the embodiment of the present application. As Figure 3 shown, the oil pump control device 400 includes:

[0163] A determination module 401, configured to determine a target cooling and lubricating flow rate for cooling and lubricating a target component of the vehicle according to the operating condition of the vehicle during vehicle operation;

[0164] A calculation module 402, configured to calculate a target rotation speed of an oil pump of the vehicle according to the target cooling lubricant flow rate;

[0165] A control module 403, configured to control the operation of the oil pump according to the target rotation speed, so that the oil pump pumps the cooling lubricant in the vehicle fuel tank into the cooling lubricant pipeline of the target component.

[0166] In an embodiment of the present application, the calculation module 402 includes: an acquisition sub-module, a calculation sub-module, and a determination sub-module;

[0167] The acquisition sub-module is configured to acquire the working efficiency of the oil pump;

[0168] The calculation sub-module is configured to calculate a first rotation speed of the oil pump according to the target cooling lubricant flow rate and the working efficiency of the oil pump;

[0169] The determination sub-module is configured to determine the target rotation speed of the oil pump according to the parameters of the oil pump and the first rotation speed of the oil pump, where the parameters of the oil pump include the chip temperature of the oil pump or the working current of the oil pump.

[0170] In an embodiment of the present application, the determination sub-module, the first determination sub-unit;

[0171] The first determination sub-unit is configured to determine the first limit rotation speed of the oil pump as the limit rotation speed corresponding to the oil temperature of the transmission of the vehicle and the chip temperature of the oil pump in the first correspondence relationship, where the first correspondence relationship includes multiple oil temperatures corresponding to the transmission, multiple chip temperatures of the oil pump, and the limit rotation speed jointly corresponding to each oil temperature and each chip temperature; and take the smaller of the first limit rotation speed of the oil pump and the first rotation speed of the oil pump as the target rotation speed of the oil pump.

[0172] In an embodiment of the present application, the determination sub-module, the second determination sub-unit;

[0173] The second determination sub-unit is configured to, if the duration for which the working current is greater than the first preset current is greater than the first preset duration, subtract the current upper limit of the oil pump from the working current to obtain a first value, where the first preset current is determined by the current upper limit of the oil pump and a preset overcurrent offset value; multiply the first value by a second value to obtain a third value, where the second value is the rotation speed of the oil pump calculated by a proportional-integral (PI) controller according to the first value, the P-term coefficient of the PI controller, and the I-term coefficient of the PI controller; add the third value to the working rotation speed of the oil pump to obtain the second limit rotation speed of the oil pump; and take the smaller of the second limit rotation speed of the oil pump and the first rotation speed of the oil pump as the target rotation speed of the oil pump.

[0174] In an embodiment of the present application, there is a determination module 401, a first determination sub-module;

[0175] The first determination sub-module is configured to, when the operating condition satisfies a first condition, determine the target cooling and lubrication flow rate according to the first flow rate corresponding to the target component and the opening degree of the flow regulating valve corresponding to the target component, where the first flow rate is determined by the cooling flow rate and the lubrication flow rate required by the target component, and the opening degree of the flow regulating valve is determined by the temperature of the target component and the oil temperature of the vehicle's transmission. The first condition includes: the speed of the vehicle is greater than or equal to a preset speed, and the gear of the vehicle is other than the neutral gear.

[0176] In an embodiment of the present application, the first determination sub-module includes: a third determination sub-unit;

[0177] The third determination sub-unit is configured to, for each target component, obtain the cooling and lubrication flow rate commonly corresponding to the first flow rate corresponding to the target component and the opening degree of the flow regulating valve corresponding to the target component from a second correspondence relationship. The second correspondence relationship includes multiple first flow rates corresponding to the target component, multiple opening degrees of the flow regulating valve, and the cooling and lubrication flow rate commonly corresponding to each first flow rate and each opening degree of the flow regulating valve; and take the maximum value of the obtained cooling and lubrication flow rates as the target cooling and lubrication flow rate.

[0178] In an embodiment of the present application, the first determination sub-module includes: a fourth determination sub-unit;

[0179] The fourth determination sub-unit is configured to determine the cooling flow rate corresponding to the temperature of the target component and the oil temperature of the transmission in a third correspondence relationship as the cooling flow rate required by the target component. The third correspondence relationship includes multiple temperatures corresponding to the target component, multiple oil temperatures corresponding to the transmission, and the cooling flow rate commonly corresponding to each temperature and each oil temperature; and add the lubrication flow rate required by the target component to the cooling flow rate required by the target component to obtain the first flow rate corresponding to the target component, where the lubrication flow rate required by the target component adopts a preset value.

[0180] In an embodiment of the present application, the first determination sub-module includes: a fifth determination sub-unit;

[0181] The fifth determination sub-unit is configured to, for each target component, obtain the opening degree of the flow regulating valve corresponding to the temperature of the target component and the oil temperature of the transmission from a fourth correspondence relationship. The fourth correspondence relationship includes multiple temperatures corresponding to the target component, multiple oil temperatures corresponding to the transmission, and the opening degree of the flow regulating valve commonly corresponding to each temperature and each oil temperature; and take the maximum value of the obtained opening degrees of the flow regulating valve as the opening degree of the flow regulating valve corresponding to each target component.

[0182] In an embodiment of the present application, a determination module 401 and a second determination sub-module;

[0183] The second determination sub-module is configured to, when the operating condition meets the second condition, determine the cooling and lubrication flow rate corresponding to the rotational speed of the motor of the vehicle and the oil temperature of the transmission in the fifth correspondence relationship as the target cooling and lubrication flow rate. The fifth correspondence relationship includes multiple rotational speeds corresponding to the motor, multiple oil temperatures corresponding to the transmission, and the cooling and lubrication flow rate jointly corresponding to each rotational speed and each oil temperature. The second condition includes: the speed of the vehicle is less than a preset speed, and the gear of the vehicle is in neutral.

[0184] In an embodiment of the present application, a determination module 401 and a third determination sub-module;

[0185] The third determination sub-module is configured to, when the operating condition meets the third condition, determine a preset cooling and lubrication flow rate as the target cooling and lubrication flow rate. The third condition includes: the speed of the vehicle is less than a preset speed, the gear of the vehicle is in neutral, the motor torque of the vehicle is less than a first threshold, and the engine speed of the vehicle is less than a second threshold.

[0186] The oil pump control device provided by the embodiments of the present application can implement each process implemented by the foregoing embodiments of the oil pump control method and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0187] Figure 5 The hardware structure diagram of the electronic device provided by the embodiments of the present application is shown.

[0188] The electronic device may include a processor 501 and a memory 502 storing computer program instructions.

[0189] Specifically, the foregoing processor 501 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0190] The memory 502 may include a mass storage for data or instructions. By way of example and not limitation, the memory 502 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 502 may include removable or non-removable (or fixed) media. Where appropriate, the memory 502 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, the memory 502 is a non-volatile solid-state memory.

[0191] The memory may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage media device, an optical storage media device, a flash memory device, an electrical, optical, or other physical / tangible memory storage device. Thus, generally, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to the first aspect or the second aspect of the present disclosure.

[0192] The processor 501 reads and executes the computer program instructions stored in the memory 502 to implement any one of the information auditing methods in the above embodiments.

[0193] In one example, the electronic device may further include a communication interface 503 and a bus 510. Among them, as Figure 5 shown, the processor 501, the memory 502, and the communication interface 503 are connected through the bus 510 and complete communication with each other.

[0194] The communication interface 503 is mainly used to implement communication between the various modules, devices, units, and / or devices in the embodiments of the present application.

[0195] Bus 510 includes hardware, software, or both, and couples components of the information auditing method or verification device to each other. By way of example and not limitation, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a MicroChannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable bus or a combination of two or more of these. Where appropriate, bus 510 may include one or more buses. Although embodiments of the present application describe and illustrate specific buses, the present application contemplates any suitable bus or interconnect.

[0196] In addition, in combination with the oil pump control method in the above embodiments, an embodiment of the present application can be implemented by providing a computer storage medium. Computer program instructions are stored on the computer storage medium; when the computer program instructions are executed by a processor, any one of the oil pump control methods in the above embodiments is implemented.

[0197] In addition, an embodiment of the present application can provide a vehicle, which includes the electronic device in the above embodiment.

[0198] In addition, an embodiment of the present application can be implemented by providing a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device implements any one of the oil pump control methods in the above embodiments.

[0199] It should be clear that the present application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described as examples. However, the method process of the present application is not limited to the described specific steps, and those skilled in the art can make various changes, modifications, and additions, or change the order between steps after understanding the spirit of the present application.

[0200] The functional blocks shown in the above-described structural block diagrams can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a functional card, and so on. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium or transmitted via a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" can include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical discs, hard disks, fiber optic media, radio frequency (RF) links, and so on. The code segment can be downloaded via a computer network such as the Internet, an intranet, and so on.

[0201] It should also be noted that the exemplary embodiments mentioned in the present application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps can be executed in the order mentioned in the embodiments, can be different from the order in the embodiments, or several steps can be executed simultaneously.

[0202] Aspects of the present disclosure have been described above with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each block in the flowcharts and / or block diagrams, and the combinations of blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the functions / actions specified in one or more blocks of the flowcharts and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and the combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by dedicated hardware that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0203] As described above, this is only the specific implementation manner of the present application. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein. It should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present application.

Claims

1. A method for controlling an oil pump, characterized in that: The method comprises: During the operation of the vehicle, determining a target cooling and lubricating flow rate for cooling and lubricating a target component of the vehicle according to the operating condition of the vehicle; Calculating a target speed of an oil pump of the vehicle according to the target cooling and lubrication flow rate; The oil pump is controlled to operate according to the target rotation speed so that the oil pump pumps the cooling lubricating fluid in the vehicle tank into the cooling lubricating pipeline of the target component.

2. The oil pump control method according to claim 1, characterized in that: The step of calculating a target rotation speed of the oil pump of the vehicle according to the target cooling and lubrication flow rate includes: Obtaining the working efficiency of the oil pump; Calculating a first rotation speed of the oil pump according to the target cooling and lubrication flow rate and the working efficiency of the oil pump; The target speed of the oil pump is determined according to a parameter of the oil pump and a first speed of the oil pump, wherein the parameter of the oil pump includes a chip temperature of the oil pump or an operating current of the oil pump.

3. The oil pump control method according to claim 2, characterized in that: The parameters of the oil pump include the chip temperature of the oil pump; Determining the target speed of the oil pump according to the parameters of the oil pump and the first speed of the oil pump includes: Determine the speed limit corresponding to the oil temperature of the transmission of the vehicle and the chip temperature of the oil pump in the first corresponding relationship as the first speed limit of the oil pump, wherein the first corresponding relationship includes a plurality of oil temperatures corresponding to the transmission, a plurality of chip temperatures of the oil pump, and a speed limit corresponding to each oil temperature and each chip temperature; The smaller one of the first rotation speed limit of the oil pump and the first rotation speed of the oil pump is set as the target rotation speed of the oil pump.

4. The oil pump control method according to claim 2, characterized in that: The parameters of the oil pump include the operating current; Determining the target speed of the oil pump according to the parameters of the oil pump and the first speed of the oil pump includes: If the duration of the working current being greater than the first preset current is greater than the first preset time, subtracting the current upper limit of the oil pump from the working current to obtain a first value, wherein the first preset current is determined by the current upper limit of the oil pump and a preset overcurrent bias value; multiplying the first value by the second value to obtain a third value, wherein the second value is the oil pump speed calculated by a proportional-integral (PI) controller according to the first value, a P-term coefficient of the PI controller, and an I-term coefficient of the PI controller; Adding the third value to the operating speed of the oil pump to obtain a second limiting speed of the oil pump; The smaller one of the second limited rotation speed of the oil pump and the first rotation speed of the oil pump is set as the target rotation speed of the oil pump.

5. The oil pump control method according to claim 1, characterized in that: Determining a target cooling and lubrication flow rate for cooling and lubricating a target component of the vehicle according to the operating condition of the vehicle includes: When the operating condition satisfies a first condition, the target cooling and lubrication flow is determined according to a first flow corresponding to the target component and an opening of a flow regulating valve corresponding to the target component, wherein the first flow is determined by the cooling flow and lubrication flow required by the target component, and the opening of the flow regulating valve is determined by the temperature of the target component and the oil temperature of a transmission of the vehicle, and the first condition includes: a speed of the vehicle is greater than or equal to a preset speed, and a gear position of the vehicle is a gear position other than neutral.

6. The oil pump control method according to claim 5, characterized in that: The number of the target components is multiple; The step of determining the target cooling and lubrication flow rate according to the first flow rate corresponding to the target component and the opening of the flow control valve corresponding to the target component comprises: For each of the target components, a cooling and lubricating flow rate corresponding to a first flow rate corresponding to the target component and a flow regulating valve opening corresponding to the target component is obtained from a second corresponding relationship, wherein the second corresponding relationship includes a plurality of first flow rates corresponding to the target component, a plurality of flow regulating valve openings, and a cooling and lubricating flow rate corresponding to each first flow rate and each flow regulating valve opening; The maximum of the obtained cooling and lubrication flow rates is used as the target cooling and lubrication flow rate.

7. The oil pump control method according to claim 5, characterized in that: The first flow rate corresponding to the target component is determined by: determining a cooling flow rate corresponding to the temperature of the target component and the oil temperature of the transmission in a third corresponding relationship as the cooling flow rate required by the target component, the third corresponding relationship including a plurality of temperatures corresponding to the target component, a plurality of oil temperatures corresponding to the transmission, and a cooling flow rate corresponding to each temperature and each oil temperature; The lubrication flow required by the target component and the cooling flow required by the target component are added to obtain a first flow corresponding to the target component, and the lubrication flow required by the target component adopts a preset value.

8. The oil pump control method according to claim 5, characterized in that: The number of the target components is multiple; The flow control valve opening corresponding to the target component is determined by: For each of the target components, obtaining a flow control valve opening corresponding to the temperature of the target component and the oil temperature of the transmission from a fourth corresponding relationship, wherein the fourth corresponding relationship includes a plurality of temperatures corresponding to the target component, a plurality of oil temperatures corresponding to the transmission, and a flow control valve opening corresponding to each temperature and each oil temperature; The largest of the acquired flow control valve openings is used as the flow control valve opening corresponding to each of the target components.

9. The oil pump control method according to claim 1, characterized in that: Determining a target cooling and lubrication flow rate for cooling and lubricating a target component of the vehicle according to the operating condition of the vehicle includes: When the operating condition satisfies the second condition, the cooling and lubrication flow corresponding to the speed of the vehicle's motor and the oil temperature of the transmission in the fifth correspondence is determined as the target cooling and lubrication flow. The fifth correspondence includes multiple speeds corresponding to the motor, multiple oil temperatures corresponding to the transmission, and the cooling and lubrication flow corresponding to each speed and each oil temperature. The second condition includes: the speed of the vehicle is less than the preset speed, and the gear position of the vehicle is neutral.

10. The oil pump control method according to claim 1, characterized in that: Determining a target cooling and lubrication flow rate for cooling and lubricating a target component of the vehicle according to the operating condition of the vehicle includes: When the operating condition satisfies a third condition, a preset cooling lubrication flow is determined as the target cooling lubrication flow, and the third condition includes: the speed of the vehicle is less than a preset speed, the gear position of the vehicle is neutral, the motor torque of the vehicle is less than a first threshold, and the engine speed of the vehicle is less than a second threshold.

11. An oil pump control device, characterized in that: The device comprises: A determination module, used to determine a target cooling and lubrication flow rate for cooling and lubricating a target component of the vehicle according to an operating condition of the vehicle during operation of the vehicle; A calculation module, configured to calculate a target rotation speed of an oil pump of the vehicle according to the target cooling and lubrication flow rate; The control module is used to control the oil pump to operate according to the target speed, so that the oil pump pumps the cooling lubricating fluid in the vehicle tank into the cooling lubricating pipeline of the target component.

12. An electronic device, characterized in that: include: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the oil pump control method according to any one of claims 1 to 10 is implemented.

13. A vehicle, characterized in that: Comprising the electronic device as claimed in claim 12.

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