CN115217576B

CN115217576B - Oil pump electromagnetic valve control method, vehicle-mounted controller and automobile

Info

Publication number: CN115217576B
Application number: CN202111339388.4A
Authority: CN
Inventors: 赵璐璐; 何志良; 吴广权; 吴庆先; 郭良锐; 何炎迎
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2023-10-20
Anticipated expiration: 2041-11-12
Also published as: CN115217576A

Abstract

The invention discloses an oil pump electromagnetic valve control method, a vehicle-mounted controller and an automobile. The method comprises the following steps: acquiring current working condition data, wherein the current working condition data comprises a current engine oil temperature, a current rotating speed and a current load; determining a target oil pressure MAP according to the current engine oil temperature; and inquiring the target oil pressure MAP according to the current rotating speed and the current load, and determining the target engine oil pressure. According to the method, the target engine oil pressure related to the engine oil temperature can be used for guaranteeing that the finally determined target engine oil pressure meets the oil pressure requirements corresponding to different engine oil temperatures.

Description

Oil pump electromagnetic valve control method, vehicle-mounted controller and automobile

Technical Field

The invention relates to the technical field of engine lubrication, in particular to an oil pump electromagnetic valve control method, a vehicle-mounted controller and an automobile.

Background

The engine oil pump is a core of an engine lubricating system, and can absorb engine oil from the oil pan and continuously provide lubricating pressure for all friction parts of the engine; if the oil supply amount of the oil pump is insufficient, the engine lacks enough lubrication pressure, and serious abrasion of the engine is caused; if the oil pump maintains a high oil supply, internal losses and unnecessary wastage of the engine are increased. The variable oil pump is an oil pump capable of providing oil supply according to the requirement of an engine, and can avoid the problems of insufficient oil supply or over-high oil supply.

The existing variable oil pump control process mainly carries out oil pressure control based on the same oil pressure MAP, namely, the same oil pressure MAP is inquired according to the rotation speed and the load acquired in real time to determine target oil pressure, and an oil pump electromagnetic valve is controlled to work based on the target oil pressure so as to adjust the oil supply quantity of the variable oil pump. The oil pressure control mode based on the same oil pressure MAP cannot be suitable for the problem of different oil pressure requirements corresponding to different engine oil temperatures. For example, when the temperature of the engine oil is ultra-low, the increasing speed of the engine oil is considered; when the temperature of engine oil rises to a certain degree, the engine emission needs to be considered with emphasis; when the temperature of engine oil continues to rise, the fuel consumption of the engine needs to be reduced by taking the emphasis into consideration; when the temperature of engine oil rises to the ultrahigh temperature, the heat dissipation of the engine needs to be considered, the oil pressure requirements corresponding to different engine oil temperatures are different, and the same oil pressure MAP cannot meet the different oil pressure requirements.

Disclosure of Invention

The embodiment of the invention provides an oil pump electromagnetic valve control method, a vehicle-mounted controller and an automobile, which are used for solving the problem that the existing variable oil pump control cannot meet oil pressure requirements corresponding to different oil temperatures.

The invention provides a control method of an oil pump electromagnetic valve, which comprises the following steps:

acquiring current working condition data, wherein the current working condition data comprises a current engine oil temperature, a current rotating speed and a current load;

determining a target oil pressure MAP according to the current engine oil temperature;

and inquiring the target oil pressure MAP according to the current rotating speed and the current load, and determining the target engine oil pressure.

Preferably, the determining the target oil pressure MAP according to the current oil temperature includes:

if the current engine oil temperature is smaller than a first temperature threshold value, determining a first oil pressure MAP related to a temperature rise requirement as a target oil pressure MAP;

if the current engine oil temperature is not less than a first temperature threshold value and the current engine oil temperature is less than a second temperature threshold value, determining a second oil pressure MAP related to the discharge demand as a target oil pressure MAP;

if the current engine oil temperature is not less than the second temperature threshold and the current engine oil temperature is less than the third temperature threshold, determining a third oil pressure MAP related to friction requirements as a target oil pressure MAP;

if the current engine oil temperature is not less than a third temperature threshold and the current engine oil temperature is less than a fourth temperature threshold, determining a fourth oil pressure MAP related to the oil consumption requirement as a target oil pressure MAP;

If the current engine oil temperature is not less than a fourth temperature threshold, determining a fifth oil pressure MAP related to heat dissipation requirements as a target oil pressure MAP;

wherein the first temperature threshold < the second temperature threshold < the third temperature threshold < the fourth temperature threshold.

Preferably, after the target oil pressure MAP is queried according to the current rotation speed and the current load, and the target oil pressure is determined, the oil pump solenoid valve control method further includes:

determining a basic duty ratio according to the target engine oil pressure, and controlling a valve core of an engine oil pump electromagnetic valve to move according to the basic duty ratio;

and receiving actual engine oil pressure, determining a target duty ratio based on the actual engine oil pressure and the target engine oil pressure, and controlling a valve core of the engine oil pump electromagnetic valve to move according to the target duty ratio.

Preferably, the valve core of the oil pump solenoid valve moves according to the basic duty cycle, including:

determining a target working frequency according to the target engine oil pressure;

and controlling a valve core of an oil pump electromagnetic valve to move according to the basic duty ratio based on the target working frequency.

Preferably, the determining the target operating frequency according to the target engine oil pressure includes:

Inquiring the oil pressure duty ratio frequency MAP according to the target engine oil pressure, and acquiring a first working frequency and a second working frequency;

comparing the base duty cycle with a first duty cycle threshold and a second duty cycle threshold;

if the basic duty cycle is smaller than the first duty cycle threshold or the basic duty cycle is larger than the second duty cycle threshold, determining the first working frequency as a target working frequency;

if the basic duty cycle is not smaller than the first duty cycle threshold and the basic duty cycle is not larger than the second duty cycle threshold, determining the second working frequency as a target working frequency;

wherein the first duty cycle threshold is less than the second duty cycle threshold, and the first operating frequency is less than the second operating frequency.

Preferably, the determining a target duty ratio based on the actual oil pressure and the target oil pressure includes:

acquiring a following oil pressure difference based on the actual oil pressure and the target oil pressure, and acquiring a following pressure difference absolute value corresponding to the following oil pressure difference;

if the following differential pressure absolute value is smaller than a target differential pressure threshold value, determining the basic duty ratio as a target duty ratio;

And if the absolute value of the following pressure difference is not smaller than the target pressure difference threshold value, dynamically adjusting the basic duty ratio to obtain the target duty ratio.

Preferably, the valve element for controlling the oil pump electromagnetic valve moves according to the target duty ratio, including:

oil pressure detection is carried out based on the actual engine oil pressure, and an oil pressure detection result is obtained;

if the oil pressure detection result is that the oil pressure is abnormal, acquiring a current working frequency and an impact working frequency, wherein the impact working frequency is smaller than the current working frequency;

in a first working time, based on the impact working frequency, controlling a valve core of the oil pump electromagnetic valve to move according to the target duty ratio;

and after the first working time, controlling a valve core of the oil pump electromagnetic valve to move according to the target duty ratio based on the current working frequency.

Preferably, the detecting the oil pressure based on the actual oil pressure to obtain an oil pressure detection result includes:

inquiring an alarm oil pressure MAP according to the current engine oil temperature, the current rotating speed and the current load to obtain an oil pressure alarm limit value;

if the actual engine oil pressure is smaller than the oil pressure alarm limit value, acquiring an oil pressure detection result with normal oil pressure;

And if the actual engine oil pressure is not smaller than the oil pressure alarm limit value, acquiring an oil pressure detection result of abnormal oil pressure.

Preferably, the receiving actual oil pressure, determining a target duty cycle based on the actual oil pressure and the target oil pressure, and after controlling the spool of the oil pump solenoid valve to move according to the target duty cycle, the oil pump solenoid valve control method further includes:

acquiring the current state of an engine;

if the current state of the engine is a flameout state, determining a cleaning working frequency and a cleaning duty ratio;

and in the second working time, controlling the valve core of the oil pump electromagnetic valve to move according to the cleaning duty ratio based on the cleaning working frequency.

Preferably, before the current working condition data is obtained, the oil pump electromagnetic valve control method further includes:

acquiring at least one sensing component state;

if all the sensing part states are normal states, executing the acquisition of the current working condition data;

if the state of the sensing part is a fault state, determining an open-loop duty ratio, and controlling a valve core of the oil pump electromagnetic valve to move according to the open-loop duty ratio.

The invention provides a vehicle-mounted controller which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the oil pump electromagnetic valve control method when executing the computer program.

The invention provides an automobile, which comprises an engine, wherein an oil pump electromagnetic valve is arranged on the engine, and the automobile further comprises the vehicle-mounted controller.

According to the oil pump electromagnetic valve control method, the vehicle-mounted controller and the automobile, the target oil pressure MAP can be determined according to the current oil temperature, and then the target oil pressure MAP is inquired according to the current rotating speed and the current load, so that the finally determined target oil pressure is ensured to meet the oil pressure requirements corresponding to different oil temperatures.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method for controlling an oil pump solenoid valve according to an embodiment of the invention;

FIG. 2 is another flow chart of a method of controlling an oil pump solenoid valve in accordance with an embodiment of the present invention;

FIG. 3 is another flow chart of a method of controlling an oil pump solenoid valve in an embodiment of the invention;

FIG. 4 is another flow chart of a method of controlling an oil pump solenoid valve in accordance with an embodiment of the present invention;

FIG. 5 is another flow chart of a method of controlling the solenoid valve of the oil pump according to an embodiment of the invention;

FIG. 6 is another flow chart of a method of controlling the solenoid valve of the oil pump according to an embodiment of the invention;

FIG. 7 is another flow chart of a method of controlling the solenoid valve of the oil pump according to an embodiment of the invention;

FIG. 8 is another flow chart of a method of controlling the solenoid valve of the oil pump according to an embodiment of the invention;

FIG. 9 is another flow chart of a method of controlling the solenoid valve of the oil pump according to an embodiment of the invention;

fig. 10 is another flowchart of a method for controlling the solenoid valve of the oil pump according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The oil pump electromagnetic valve control method provided by the embodiment of the invention can be applied to a vehicle-mounted controller, wherein the vehicle-mounted controller can be a whole vehicle controller arranged on an automobile, and the whole vehicle controller can control a variable oil pump to work, can be an engine controller arranged on the automobile and can also be an independently arranged oil pump controller. In this example, the vehicle-mounted controller may determine, according to the current oil temperature collected in real time by the oil temperature sensor, a target oil pressure MAP matching with the current oil temperature, and control the oil pump solenoid valve to operate based on the target oil pressure MAP, so as to satisfy the oil pressure demands corresponding to different oil temperatures.

In an embodiment, as shown in fig. 1, a method for controlling an oil pump electromagnetic valve is provided, and the method is applied to a vehicle-mounted controller for illustration, and includes the following steps:

s101: acquiring current working condition data, wherein the current working condition data comprises a current engine oil temperature, a current rotating speed and a current load;

s102: determining a target oil pressure MAP according to the current engine oil temperature;

s103: and inquiring the target oil pressure MAP according to the current rotating speed and the current load, and determining the target engine oil pressure.

The current working condition data refer to data collected under the current working condition. The current engine oil temperature refers to the engine oil temperature acquired in real time by adopting an oil temperature sensor. The current rotation speed refers to the rotation speed of the engine acquired in real time by a rotation speed sensor. The current load is calculated according to the sensor values acquired by the load related sensors in real time, and can be displayed by the intake pressure or the fuel injection quantity. A load related sensor is herein understood to be a sensor for acquiring a parameter corresponding to a load.

As an example, in step S101, the vehicle-mounted controller may collect data related to the control of the solenoid valve of the oil pump under the current working condition, and determine the data as the current working condition data. In this example, the current working condition data acquired by the vehicle-mounted controller includes the current engine oil temperature acquired by the oil temperature sensor in real time, the current rotation speed acquired by the rotation speed sensor in real time and the related sensor value acquired by the load related sensor, and the current load is calculated in real time according to the related sensor value. Understandably, the vehicle-mounted controller can acquire the current engine oil temperature, the current rotating speed and the current load corresponding to the current moment in real time, and the instantaneity of current working condition data such as the current engine oil temperature, the current rotating speed and the current load is guaranteed.

As an example, in step S102, the vehicle-mounted controller may determine a target temperature interval corresponding to the current oil temperature according to the current oil temperature, and determine the configuration oil pressure MAP corresponding to the target temperature interval as the target oil pressure MAP corresponding to the current oil temperature. The configuration oil pressure MAPs are preset oil pressure MAPs, and each configuration oil pressure MAP corresponds to a configuration temperature interval, wherein the configuration temperature interval is a preset temperature interval. It is understood that the vehicle-mounted controller can determine the target oil pressure MAP matched with the current oil temperature according to the current oil temperature, wherein the target oil pressure MAP refers to the oil pressure MAP determined in advance according to the oil pressure requirement corresponding to the current oil temperature, so that the follow-up oil pressure pump control can adapt to different oil pressure requirements. The target oil pressure MAP is an oil pressure MAP that matches the current oil temperature. In this example, the target oil pressure MAP is a three-dimensional MAP for reflecting the association relationship between the rotation speed-load-oil pressure.

As an example, in step S103, the vehicle-mounted controller may query the target oil pressure MAP matched with the current oil temperature according to the current rotation speed and the current load acquired in real time, and determine the oil pressure corresponding to the current rotation speed and the current load in the target oil pressure MAP as the target oil pressure. The target engine oil pressure is the engine oil pressure determined according to the table look-up of the current rotating speed and the current load, and is the engine oil pressure matched with the current working condition of the engine, and can be also understood as the engine oil pressure which needs to be controlled to be achieved.

According to the oil pump electromagnetic valve control method provided by the embodiment, the target oil pressure MAP can be determined according to the current oil temperature, and then the target oil pressure MAP is inquired according to the current rotating speed and the current load, so that the finally determined target oil pressure is ensured to meet the oil pressure requirements corresponding to different oil temperatures.

In one embodiment, as shown in fig. 2, step S102, i.e., determining the target oil pressure MAP according to the current oil temperature, includes:

s201: if the current engine oil temperature is smaller than a first temperature threshold value, determining a first oil pressure MAP related to the temperature rise requirement as a target oil pressure MAP;

s202: if the current engine oil temperature is not less than the first temperature threshold and the current engine oil temperature is less than the second temperature threshold, determining a second oil pressure MAP related to the discharge demand as a target oil pressure MAP;

s203: if the current engine oil temperature is not less than the second temperature threshold and the current engine oil temperature is less than the third temperature threshold, determining a third oil pressure MAP related to friction requirements as a target oil pressure MAP;

s204: if the current engine oil temperature is not less than the third temperature threshold and the current engine oil temperature is less than the fourth temperature threshold, determining a fourth oil pressure MAP related to the oil consumption requirement as a target oil pressure MAP;

S205: if the current engine oil temperature is not less than the fourth temperature threshold, determining a fifth oil pressure MAP related to heat dissipation requirements as a target oil pressure MAP;

The first temperature threshold, the second temperature threshold, the third temperature threshold and the fourth temperature threshold are all preset temperature values, and can be respectively represented by T1, T2, T3 and T4. The current oil temperature is the oil temperature collected at the current time, and may be represented by T0.

As an example, in step S201, when the current oil temperature is less than the first temperature threshold, the vehicle-mounted controller indicates that the current oil temperature of the engine is in the ultra-low temperature range (i.e., T0< T1), and at this time, the oil temperature increasing speed needs to be considered, so that the first oil pressure MAP related to the temperature increasing demand may be determined as the target oil pressure MAP, so that the oil temperature may be increased rapidly when the oil pump solenoid valve is controlled to operate based on the target oil pressure determined based on the target oil pressure MAP. The first oil pressure MAP related to the temperature increase demand refers to the oil pressure MAP that is configured in advance according to the temperature increase demand that is how quickly the oil temperature is increased. In this example, in the first oil pressure MAP related to the temperature increase demand, the range of the high oil pressure region is large, so that the temperature increase speed of the engine oil can be increased, and the water content and the fuel content in the engine oil can be reduced, so as to prolong the service life of the engine oil.

As an example, in step S202, when the current oil temperature is not less than the first temperature threshold and the current oil temperature is less than the second temperature threshold, the vehicle-mounted controller indicates that the current oil temperature of the engine is increased to exceed the ultralow temperature interval and enters the discharge temperature interval (i.e. T1 is less than or equal to T0< T2), and at this time, the engine discharge needs to be considered with emphasis, so that the second oil pressure MAP related to the discharge demand may be determined as the target oil pressure MAP, so that the engine discharge may be effectively reduced when the oil pump solenoid valve is controlled to operate based on the target oil pressure determined based on the target oil pressure MAP. Wherein the second oil pressure MAP related to the emission demand is an oil pressure MAP configured in advance according to how quickly the emission demand is reduced. In this example, the range of the low oil pressure region is larger in the second oil pressure MAP related to the emission demand, and the piston cooling nozzle and other components can be ensured to be closed, so that the emission of the engine is reduced.

As an example, in step S203, when the current oil temperature is not less than the second temperature threshold and the current oil temperature is less than the third temperature threshold, the vehicle-mounted controller indicates that the current oil temperature of the engine is increased to exceed the discharge temperature interval and enters the friction temperature interval (i.e. T2 is less than or equal to T0< T3), and at this time, the consideration of reducing the internal friction of the engine needs to be focused, so the third oil pressure MAP related to the friction requirement may be determined as the target oil pressure MAP, so that the internal friction of the engine may be effectively reduced when the oil pump solenoid valve is controlled to operate based on the target oil pressure determined by the target oil pressure MAP. The third oil pressure MAP related to the friction demand is configured in advance according to the friction demand of how to effectively reduce friction. In this example, in the third oil pressure MAP related to the friction demand, since the friction temperature zone is greater than the discharge temperature zone, the engine is basically already warmed up, and therefore, the low oil pressure region range in the third oil pressure MAP is reduced relative to the low oil pressure region range in the second oil pressure MAP, which can increase the engine oil temperature raising rate, further reduce the water content and the fuel content in the engine oil, and not only can prolong the engine oil service life, but also can reduce the friction inside the engine.

As an example, in step S204, when the current oil temperature is not less than the third temperature threshold and the current oil temperature is less than the fourth temperature threshold, it is indicated that the current oil temperature of the engine increases to exceed the friction temperature interval and enters the oil consumption temperature interval (i.e. T3 is less than or equal to T0< T4), and at this time, the engine oil consumption needs to be reduced by taking into consideration, so that the fourth oil pressure MAP related to the oil consumption need may be determined as the target oil pressure MAP, so that the engine oil consumption may be effectively reduced when the oil pump solenoid valve is controlled to operate based on the target oil pressure determined by the target oil pressure MAP. The fourth oil pressure MAP related to the fuel consumption demand is an oil pressure MAP configured in advance according to how to effectively reduce the fuel consumption. In this example, in the fourth oil pressure MAP related to the oil consumption demand, since the oil consumption temperature interval is greater than the friction temperature interval, when the current oil temperature is within the oil consumption temperature interval, which indicates that the current oil temperature has reached the expected oil temperature, the low oil pressure region range of the fourth oil pressure MAP may be enlarged relative to the low oil pressure region range of the third oil pressure MAP, so as to reduce the oil flow, thereby reducing the power consumption of the variable oil pump, and achieving the purpose of reducing the oil consumption.

As an example, in step S205, when the vehicle-mounted controller is not less than the fourth temperature threshold, that is, when the current oil temperature of the engine is increased to exceed the oil consumption temperature interval, the vehicle-mounted controller enters the ultra-high temperature interval (i.e., T0 is greater than or equal to T4), and at this time, the engine heat dissipation needs to be considered, so that the fifth oil pressure MAP related to the heat dissipation requirement can be determined as the target oil pressure MAP, so that the heat dissipation can be quickly performed when the oil pump solenoid valve is controlled to operate based on the target oil pressure determined by the target oil pressure MAP. The fifth oil pressure MAP related to the heat dissipation requirement is configured in advance according to how fast the heat dissipation requirement is. In this example, when the current oil temperature is in the ultra-high temperature range, it is indicated that the current oil temperature is at a higher level, and if heat dissipation is not timely performed, damage to engine parts may be caused, so that the range of the high oil pressure region in the fifth oil pressure MAP needs to be enlarged relative to the range of the high oil pressure region in the fourth oil pressure MAP to increase the oil flow rate, thereby increasing the heat dissipation capacity of the engine and achieving the heat dissipation purpose.

In this embodiment, according to the comparison result between the current engine oil temperature and different temperature thresholds, a configuration temperature interval corresponding to the current engine oil temperature, that is, the above ultra-low temperature interval, the emission temperature interval, the friction temperature interval, the oil consumption temperature interval, and the ultra-high temperature interval may be determined; and determining the oil pressure MAP corresponding to the different configuration temperature intervals as a target oil pressure MAP, so that the obtained target oil pressure MAP can meet the oil pressure requirement corresponding to the current engine oil temperature.

In the existing engine lubrication system, in order to obtain stable oil pressure, a large constant working frequency is needed to control the oil pump electromagnetic valve to work, so that the problems of large energy consumption and large abrasion loss of the oil pump electromagnetic valve of the engine lubrication system are caused.

In one embodiment, as shown in fig. 3, after step S103, that is, after the target oil pressure MAP is queried according to the current rotation speed and the current load, the oil pump solenoid valve control method further includes:

s301: determining a basic duty ratio according to the target engine oil pressure, and controlling a valve core of an engine oil pump electromagnetic valve to move according to the basic duty ratio;

s302: and receiving actual engine oil pressure, determining a target duty ratio based on the actual engine oil pressure and the target engine oil pressure, and controlling a valve core of an engine oil pump electromagnetic valve to move according to the target duty ratio.

As an example, in step S301, the vehicle-mounted controller may query the oil pressure duty ratio MAP according to the target oil pressure, and determine a duty ratio corresponding to the target oil pressure in the oil pressure duty ratio MAP as a base duty ratio corresponding to the target oil pressure. Then, the vehicle-mounted controller can control the oil pump electromagnetic valve to work according to the basic duty ratio so as to adjust the oil supply quantity of the engine according to the target oil pressure. It is understood that the oil supply amount of the engine is adjusted according to the basic duty ratio determined by the target oil pressure, and the oil supply amount of the engine is related to the current oil temperature because the target oil pressure is the oil pressure determined based on the target oil pressure MAP corresponding to the different current oil temperatures, so as to meet the oil pressure requirements corresponding to the different oil temperatures.

The actual oil pressure is the oil pressure collected by the oil pressure sensor in real time, and in this example, the oil pressure sensor may be disposed on an oil cooler of the engine, or may be disposed at other positions of the engine where the oil pressure can be accurately measured.

As an example, in step S302, the on-board controller needs to receive the actual oil pressure collected in real time by the oil pressure sensor after controlling the valve core of the oil pump solenoid valve to move according to the basic duty cycle. Then, the vehicle-mounted controller can judge whether the actual engine oil pressure follows the target engine oil pressure according to the actual engine oil pressure and the target engine oil pressure; if the actual engine oil pressure follows the target engine oil pressure, the actual engine oil pressure is indicated to meet the oil pressure requirement corresponding to the target engine oil pressure, and at the moment, the basic duty ratio can be directly determined as the target duty ratio; if the actual engine oil pressure does not follow the target engine oil pressure, the actual engine oil pressure does not meet the oil pressure requirement corresponding to the target engine oil pressure, and at the moment, the basic duty ratio needs to be adjusted, and the adjusted target duty ratio is obtained. Finally, after the vehicle-mounted controller obtains the target duty ratio, the valve core of the oil pump electromagnetic valve can be controlled to move according to the target duty ratio so as to determine that the actual oil pressure meets the oil pressure requirement corresponding to the target oil pressure, and the closed-loop control of the oil pressure is realized.

In one embodiment, as shown in fig. 4, step S301, that is, controlling the spool of the oil pump solenoid valve to move according to the basic duty cycle, includes:

s401: determining a target working frequency according to the target engine oil pressure;

s402: based on the target working frequency, a valve core of the oil pump electromagnetic valve is controlled to move according to the basic duty ratio.

The target working frequency refers to a frequency which is determined according to the target engine oil pressure and needs to control the working of the engine oil pump electromagnetic valve, and can be specifically understood as a frequency which controls the valve core of the engine oil pump electromagnetic valve to work according to the basic duty ratio under the current working condition corresponding to the current engine oil temperature, the current rotating speed and the current load.

As an example, in step S401, after querying the target oil pressure MAP, determining the target oil pressure, and determining the base duty cycle according to the target oil pressure, the vehicle-mounted controller may query the oil pressure duty cycle frequency MAP based on the target oil pressure, and quickly determine the target operating frequency matching the target oil pressure from the oil pressure duty cycle frequency MAP. The oil pressure duty ratio frequency MAP is a MAP which is configured in advance and used for reflecting the association relation between the oil pressure and the duty ratio operating frequency.

As an example, in step S402, the vehicle-mounted controller may control the oil pump solenoid valve to operate according to the determined target operating frequency and the basic duty cycle. It is understandable that the on-board controller can control the valve core of the oil pump solenoid valve to operate according to the basic duty cycle according to the target operating frequency.

In this embodiment, the target operating frequency may be dynamically determined according to the target oil pressure matched with the current working condition, so as to control the valve core of the oil pump solenoid valve to move according to the basic duty cycle based on the target operating frequency.

In one embodiment, as shown in fig. 5, in step S401, determining the target operating frequency according to the target engine oil pressure includes:

s501: inquiring the oil pressure duty ratio frequency MAP according to the target engine oil pressure, and acquiring a first working frequency and a second working frequency;

s502: comparing the base duty cycle with a first duty cycle threshold and a second duty cycle threshold;

s503: if the basic duty cycle is smaller than the first duty cycle threshold value or the basic duty cycle is larger than the second duty cycle threshold value, the first working frequency is determined to be the target working frequency;

s504: if the basic duty cycle is not smaller than the first duty cycle threshold value and the basic duty cycle is not larger than the second duty cycle threshold value, determining the second working frequency as the target working frequency;

The first duty ratio threshold is smaller than the second duty ratio threshold, and the first working frequency is smaller than the second working frequency.

The first operating frequency and the second operating frequency refer to two operating frequencies determined by inquiring the oil pressure duty ratio frequency MAP according to the target oil pressure, and are respectively represented by H1 and H2. In this example, the first operating frequency H1 is less than the second operating frequency H2.

The first duty ratio threshold value and the second duty ratio threshold value are two preset duty ratio threshold values, and are respectively represented by X and Y, and in the example, the first duty ratio threshold value X is smaller than the second duty ratio threshold value Y. Let the basic duty cycle be M.

As an example, in step S501, after querying the target oil pressure MAP, determining the target oil pressure, and determining the base duty ratio according to the target oil pressure, the on-vehicle controller may query the oil pressure duty ratio frequency MAP based on the target oil pressure, quickly determine two operating frequencies matching the target oil pressure from the oil pressure duty ratio frequency MAP, determine a smaller value of the two operating frequencies as the first operating frequency H1, and determine a larger value of the two operating frequencies as the second operating frequency H2.

As an example, in step S502, the vehicle-mounted controller may compare the determined basic duty ratio with a first duty ratio threshold X and a second duty ratio threshold Y set in advance, and determine the optimal target operating frequency according to the comparison result of the basic duty ratio with the first duty ratio threshold X and the second duty ratio threshold Y.

As an example, in step S503, the in-vehicle controller determines the first operating frequency as the target operating frequency when the basic duty cycle M is smaller than the first duty cycle threshold X (M < X), or the basic duty cycle M is larger than the second duty cycle threshold Y (M > Y). That is, when the base duty ratio is not between the two operating frequencies determined from the target oil pressure query oil pressure duty ratio frequency MAP, the smaller value of the two operating frequencies is adopted to determine as the target operating frequency.

As an example, in step S504, the in-vehicle controller determines the second operating frequency as the target operating frequency when the base duty ratio M is not less than the first duty ratio threshold value X and the base duty ratio M is not greater than the second duty ratio threshold value Y ((i.e., x+.m+.y).

In general, when the basic duty ratio of the oil pump electromagnetic valve is too small, the valve core of the oil pump electromagnetic valve can vibrate greatly, so that the oil pressure is unstable; when the basic duty ratio of the oil pump electromagnetic valve is too large, the problems of too high energy consumption and increased abrasion can occur. In the example, the first duty ratio threshold and the second duty ratio threshold are adopted to segment the basic duty ratio, so that the effects of saving energy and reducing abrasion are achieved when the basic duty ratio is smaller than the first duty ratio threshold or the basic duty ratio is larger than the second duty ratio threshold, and the oil pump electromagnetic valve is controlled to work based on the basic duty ratio by adopting smaller first working frequency, so that the oil pump electromagnetic valve can achieve stable oil pressure.

In one embodiment, as shown in fig. 6, step S302, that is, determining the target duty ratio based on the actual oil pressure and the target oil pressure, includes:

s601: acquiring a following oil pressure difference based on the actual oil pressure and the target oil pressure, and acquiring a following pressure difference absolute value corresponding to the following oil pressure difference;

s602: if the following differential pressure absolute value is smaller than the target differential pressure threshold value, determining the basic duty ratio as the target duty ratio;

s603: and if the following differential pressure absolute value is not smaller than the target differential pressure threshold value, dynamically adjusting the basic duty ratio to acquire the target duty ratio.

As an example, in step S601, the in-vehicle controller may determine the difference between the actual oil pressure and the target oil pressure as the following oil pressure difference. Then, the vehicle controller may determine the absolute value of the following oil pressure difference as the following pressure difference absolute value.

The target differential pressure threshold is a preset threshold used for evaluating whether the differential pressure is larger or not, and the dynamic adjustment of the duty ratio is required only when the differential pressure is larger.

As an example, in step S602, the vehicle-mounted controller may compare the following differential pressure absolute value with the target differential pressure threshold, and when the following differential pressure absolute value is smaller than the target differential pressure threshold, it is determined that the differential pressure between the actual engine oil pressure and the target engine oil pressure does not reach the differential pressure larger standard, and at this time, it is not necessary to dynamically adjust the base duty ratio, so the base duty ratio may be directly determined as the target duty ratio.

As an example, in step S603, the vehicle-mounted controller may compare the following differential pressure absolute value with the target differential pressure threshold, and when the following differential pressure absolute value is not smaller than the target differential pressure threshold, identify the differential pressure between the actual engine oil pressure and the target engine oil pressure, and reach the differential pressure larger standard, at this time, dynamically adjust the basic duty ratio is required. In this example, the vehicle-mounted controller may reduce or increase the basic duty cycle according to the actual oil pressure and the target oil pressure, so as to obtain the target duty cycle after dynamic adjustment.

It is understandable that, according to the comparison result of the following differential pressure absolute value and the target differential pressure threshold value, it is determined whether the basic duty cycle needs to be dynamically adjusted, so as to determine the target duty cycle, and realize closed-loop control of the engine oil pressure by using the target duty cycle, so that in the oil pressure closed-loop control process, the actual oil pressure follows the target oil pressure, and the actual oil pressure meets the oil pressure requirement corresponding to the target oil pressure.

In one embodiment, step S603, namely dynamically adjusting the basic duty cycle, obtains the target duty cycle, includes:

s6031: if the following oil pressure difference is a negative value, the basic duty ratio is reduced, and the target duty ratio is obtained;

S6032: and if the following oil pressure difference is a positive value, the basic duty ratio is increased, and the target duty ratio is obtained.

As an example, in step S6031, when the vehicle-mounted controller needs to dynamically adjust the basic duty ratio, the vehicle-mounted controller determines the difference between the actual oil pressure and the target oil pressure as the following oil pressure difference, and if the following oil pressure difference is a negative value, it indicates that the actual oil pressure is smaller than the target oil pressure, at this time, the basic duty ratio may be reduced to form the target duty ratio, so that the actual oil pressure may be increased when the oil pump solenoid valve is controlled to operate based on the target duty ratio. In this example, the vehicle-mounted controller may determine the target duty cycle based on a preset duty cycle step to reduce the base duty cycle, that is, a difference between the base duty cycle and the duty cycle step.

As an example, in step S6032, when the vehicle-mounted controller needs to dynamically adjust the basic duty ratio, the vehicle-mounted controller determines the difference between the actual oil pressure and the target oil pressure as the following oil pressure difference, and if the following oil pressure difference is a positive value, it indicates that the actual oil pressure is greater than the target oil pressure, at this time, the basic duty ratio may be increased to form the target duty ratio, so that the actual oil pressure may be reduced when the oil pump solenoid valve is controlled to operate based on the target duty ratio. In this example, the vehicle-mounted controller may determine the target duty cycle based on a preset duty cycle step to increase the basic duty cycle, that is, a sum of the basic duty cycle and the duty cycle step.

In one embodiment, as shown in fig. 7, step S302, that is, controlling the spool of the oil pump solenoid valve to move according to the target duty cycle, includes:

s701: oil pressure detection is carried out based on actual engine oil pressure, and an oil pressure detection result is obtained;

s702: if the oil pressure detection result is that the oil pressure is abnormal, the current working frequency and the impact working frequency are obtained, and the impact working frequency is smaller than the current working frequency;

s703: in the first working time, based on the impact working frequency, controlling a valve core of an oil pump electromagnetic valve to move according to a target duty ratio;

s704: after the first working time period, based on the current working frequency, a valve core of the oil pump electromagnetic valve is controlled to move according to the target duty ratio.

As an example, in step S701, after receiving the actual oil pressure collected in real time by the oil pressure sensor, the vehicle-mounted controller may use a preset oil pressure alarm limit value to perform oil pressure detection on the actual oil pressure, so as to determine whether the oil pump solenoid valve has a risk of jamming according to a comparison result between the oil pressure alarm limit value and the actual oil pressure.

The current working frequency refers to the frequency for controlling the electromagnetic valve of the oil pump to work at the current moment. The shock operating frequency is the frequency at which the solenoid valve of the oil pump needs to be controlled to operate when the oil pressure is abnormal.

As an example, in step S702, when the oil pressure detection result is that the oil pressure is abnormal, the vehicle-mounted controller considers that the probability that the oil pump electromagnetic valve is at a jamming risk is high, and at this time, the vehicle-mounted controller needs to obtain the current working frequency corresponding to the current time, and obtain the impact working frequency for controlling the oil pump electromagnetic valve to open and jam, where the impact working frequency is smaller than the current working frequency. In this example, the current working frequency may be the target working frequency at the current time, which may meet the requirements of smaller energy consumption and smaller wear corresponding to the current time. The vehicle-mounted controller can determine the default minimum working frequency of the system as the impact working frequency, and can also determine the impact working frequency according to the current working frequency. For example, the current operating frequency may be subtracted by the frequency reduction step, i.e., an impact operating frequency less than the current operating frequency may be obtained. Wherein the frequency reduction step size is a step size set in advance for controlling the frequency reduction.

The first working time is a preset time, and specifically is a time period for controlling a valve core of the oil pump electromagnetic valve to work according to the impact working frequency.

As an example, in step S703, after determining the impact working frequency, the vehicle-mounted controller may use the impact working frequency to control the valve core of the oil pump solenoid valve to move according to the target duty cycle within the first working period, and use the impact working frequency smaller than the current working frequency to control the oil pump solenoid valve to work, so as to help to flush out the clamping stagnation, so as to avoid the problems of failure of the engine lubrication system and larger engine wear caused by the clamping stagnation of the oil pump solenoid valve.

As an example, in step S704, after the working time period for controlling the oil pump electromagnetic valve to work based on the impact working frequency reaches the first working time period, the vehicle-mounted controller may switch back to the current working frequency, and control the valve core of the oil pump electromagnetic valve to move according to the target duty ratio. Generally, after the working time length of the oil pump electromagnetic valve based on the impact working frequency reaches the first working time length, the clamping stagnation risk of the oil pump electromagnetic valve is cleared, so that the current working frequency can be switched back, and the valve core of the oil pump electromagnetic valve is continuously controlled to move according to the target duty ratio, so that the purposes of low energy consumption and low abrasion loss are met.

In the embodiment, when the oil pressure detection result corresponding to the actual oil pressure is abnormal, the oil pump electromagnetic valve can be controlled to work by adopting smaller impact working frequency in the first working time, so that the clamping stagnation is helped to be punched, and the problems of failure of an engine lubrication system and larger engine abrasion caused by the clamping stagnation of the oil pump electromagnetic valve are avoided; and after the first working time, the electromagnetic valve of the oil pump is controlled to work by adopting a larger current working frequency so as to meet the requirements of low energy consumption and low abrasion loss.

In one embodiment, as shown in fig. 8, in step S701, that is, oil pressure detection is performed based on actual oil pressure, an oil pressure detection result is obtained, including:

s801: inquiring an alarm oil pressure MAP according to the current engine oil temperature, the current rotating speed and the current load, and acquiring an oil pressure alarm limit value;

s802: if the actual engine oil pressure is smaller than the oil pressure alarm limit value, acquiring an oil pressure detection result with normal oil pressure;

s803: and if the actual engine oil pressure is not smaller than the oil pressure alarm limit value, acquiring an oil pressure detection result of the oil pressure abnormality.

The warning oil pressure MAP is a MAP which is preconfigured and used for reflecting the association relation between the current working conditions corresponding to different oil temperatures, rotating speeds and loads and the warning limit value of the current working conditions.

As an example, in step S801, the vehicle-mounted controller may query the alarm oil pressure MAP according to the current working condition data such as the current oil temperature, the current rotation speed, and the current load acquired in real time, determine the oil pressure alarm limit corresponding to the actual oil pressure, and may quickly and accurately acquire the oil pressure alarm limit related to the current working condition data.

As an example, in step S802, after determining the oil pressure alarm limit value according to the table lookup of the current working condition data, the vehicle-mounted controller needs to compare the actual oil pressure collected in real time with the oil pressure alarm limit value, and if the actual oil pressure is smaller than the oil pressure alarm limit value, the vehicle-mounted controller obtains the oil pressure detection result of normal oil pressure.

As an example, in step S803, after determining the oil pressure alarm limit value according to the table lookup of the current working condition data, the vehicle-mounted controller needs to compare the actual oil pressure collected in real time with the oil pressure alarm limit value, and if the actual oil pressure is not less than the oil pressure alarm limit value, obtain the oil pressure detection result of the abnormal oil pressure.

In the embodiment, the oil pressure alarm limit value is determined by adopting the table lookup of the current working condition data such as the current engine oil temperature, the current rotating speed and the current load, so that the oil pressure alarm limit value is related to the factors such as the oil temperature, the rotating speed and the load, and whether the actual engine oil pressure is abnormal in oil pressure can be more effectively detected, and the problems of missing alarm, failure of an engine lubricating system and large engine abrasion loss are avoided.

In an embodiment, after step S701, that is, after the oil pressure detection based on the actual oil pressure, the method further includes:

if the oil pressure detection result is that the oil pressure is abnormal, acquiring abnormal duration, and controlling the vehicle-mounted instrument to alarm when the abnormal duration reaches the target duration.

The abnormal duration is the duration that the oil pressure detection result is the oil pressure abnormality. The target duration is a preset threshold for evaluating whether the anomaly duration reaches a time threshold that lasts for a longer criterion.

Generally, when the oil pressure detection result is abnormal, the vehicle-mounted controller can directly control the vehicle-mounted instrument to alarm, but the direct alarm has a larger false triggering risk, so in the example, when the oil pressure detection result is abnormal, the vehicle-mounted controller needs to acquire the abnormal duration; comparing the abnormal duration with a preset target duration; when the abnormal duration time does not reach the target duration time, namely the continuous longer standard is not reached, whether a fault exists or not cannot be determined, and therefore the vehicle-mounted instrument is not controlled to alarm; when the abnormal duration reaches the target duration, namely the long-lasting standard is reached, the fault can be determined, and therefore, the vehicle-mounted instrument needs to be controlled to alarm. Understandably, the vehicle-mounted instrument is controlled to alarm only when the abnormal duration reaches the target duration, so that the reliability of the vehicle-mounted instrument alarm is ensured, and the risk of false triggering is avoided.

In one embodiment, as shown in fig. 9, in step S302, that is, receiving the actual oil pressure, determining the target duty cycle based on the actual oil pressure and the target oil pressure, after controlling the spool of the oil pump solenoid valve to move according to the target duty cycle, the oil pump solenoid valve control method further includes:

S901: acquiring the current state of an engine;

s902: if the current state of the engine is a flameout state, determining a cleaning working frequency and a cleaning duty ratio;

s903: and in the second working time period, based on the cleaning working frequency, controlling the valve core of the oil pump electromagnetic valve to move according to the cleaning duty ratio.

The current state of the engine refers to the current state of the engine, and can be any one of an ignition state and a flameout state.

As an example, in step S901, the vehicle-mounted controller needs to acquire the current state of the engine in real time, for example, the vehicle-mounted controller may determine the current state of the engine according to signals sent by the throttle valve, the crank position sensor, the ignition system, and the like, so as to determine whether the engine is turned off.

Wherein, the cleaning frequency and the cleaning duty ratio are preset values of the system. The cleaning operation frequency refers to the operation frequency when the oil pump solenoid valve enters the cleaning mode. As an example, a minimum operating frequency that may be default to the system is determined as the wash operating frequency. The cleaning duty ratio refers to the duty ratio of the oil pump solenoid valve in the cleaning mode.

As an example, in step S902, the vehicle-mounted controller needs to control the oil pump solenoid valve to enter the cleaning mode when the current state of the engine is a flameout state, and therefore, needs to acquire the cleaning operation frequency and the cleaning duty ratio set in advance by the system.

The second working time is preset time, and specifically is time for controlling the oil pump electromagnetic valve to work in a cleaning mode.

As an example, in step S903, after determining the cleaning frequency and the cleaning duty cycle, the on-board controller needs to control the valve element of the oil pump solenoid valve to move according to the cleaning duty cycle during the second operation period based on the cleaning frequency. Generally, the smaller the cleaning working frequency is, the larger the valve core movement amplitude of the oil pump electromagnetic valve is, the larger the oil pressure fluctuation amplitude caused by the valve core movement amplitude is, so that the valve core is more beneficial to flushing and clamping stagnation, and the risk of clamping stagnation of the oil pump electromagnetic valve is reduced. For example, after the engine is shut down, the engine oil pump electromagnetic valve is given a cleaning duty ratio of 100% -0% -100%, and the engine oil pump electromagnetic valve moves for 4 times within 2s, so that the valve core of the engine oil pump electromagnetic valve moves greatly according to the cleaning duty ratio, the engine oil pump electromagnetic valve is cleaned, and the jamming risk is reduced.

In this embodiment, in the second working time period after the engine is turned off, the valve core of the oil pump electromagnetic valve is controlled to move according to the cleaning duty ratio based on the cleaning working frequency, so that the larger the valve core movement amplitude is, the larger the oil pressure fluctuation amplitude caused by the valve core is, the more the valve core is conducive to flushing and clamping stagnation, and the risk of clamping stagnation of the oil pump electromagnetic valve is reduced. It is understood that, since the valve core movement amplitude of the oil pump solenoid valve is larger under the control of the cleaning frequency, in order to avoid influencing the effective lubrication of the vehicle-mounted parts, the valve core movement of the oil pump solenoid valve is controlled under the control of the cleaning frequency after the engine is shut down.

In an embodiment, as shown in fig. 10, before step S101, that is, before the current operating mode data is acquired, the oil pump solenoid valve control method further includes:

s1001: acquiring at least one sensing component state;

s1002: if all the sensing part states are normal states, executing to acquire current working condition data;

s1003: if the state of the sensing part is a fault state, determining an open-loop duty ratio, and controlling a valve core of the oil pump electromagnetic valve to move according to the open-loop duty ratio.

The state of the sensing component refers to the state of a certain vehicle-mounted sensing component at the current moment, and can be a normal state or a fault state. The open-loop duty ratio is the duty ratio of the preset control oil pump electromagnetic valve in the open-loop control process.

As an example, in step S1001, the in-vehicle controller may receive the sensing component status sent by at least one in-vehicle sensing component, where the sensing component includes, but is not limited to, a rotation speed sensor, an oil temperature sensor, an oil pressure sensor, a load related sensor, a water temperature sensor, an ambient pressure sensor, and a variable valve timing (Variable valve timing, simply referred to as VVT).

As an example, in step S1002, the vehicle-mounted controller is in at least one sensing component state, and all sensing component states are normal states, which indicates that all vehicle-mounted sensing components can work normally, and at this time, the oil pump electromagnetic valve can be closed-loop controlled, so that current working condition data can be acquired. Understandably, the oil pump electromagnetic valve can perform closed-loop control only when all the sensing component states are normal, so as to acquire current working condition data, and avoid wrong information of the vehicle-mounted sensing component with a fault from influencing the accuracy of closed-loop control.

As an example, in step S1003, if the state of the sensing component is a fault state, the in-vehicle controller indicates that there is at least one in-vehicle sensing component that cannot work normally, so that the closed-loop control of the oil pump solenoid valve cannot be performed, and the open-loop duty ratio needs to be determined, so as to control the valve core of the oil pump solenoid valve to move according to the open-loop duty ratio.

It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.

In one embodiment, a vehicle-mounted controller is provided, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the method for controlling the solenoid valve of the oil pump in the above embodiment when executing the computer program, for example, S101-S103 shown in fig. 1, or S101-S103 shown in fig. 2-10, which are not repeated here.

In an embodiment, an automobile is provided, which includes an engine, an oil pump electromagnetic valve is disposed on the engine, and the vehicle-mounted controller is further provided, where the vehicle-mounted controller may implement the oil pump electromagnetic valve control method in the above embodiment, for example, S101-S103 shown in fig. 1, or S2-S10, which are not repeated here.

Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions.

The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.

Claims

1. The oil pump electromagnetic valve control method is characterized by comprising the following steps:

inquiring the target oil pressure MAP according to the current rotating speed and the current load, and determining target engine oil pressure;

wherein, the case of control oil pump solenoid valve is according to basic duty cycle motion, includes:

inquiring the oil pressure duty ratio frequency MAP according to the target engine oil pressure, and acquiring a first working frequency and a second working frequency, wherein the first working frequency is smaller than the second working frequency;

comparing the base duty cycle with a first duty cycle threshold and a second duty cycle threshold, the first duty cycle threshold being less than the second duty cycle threshold;

2. The oil pump solenoid valve control method according to claim 1, wherein the determining a target oil pressure MAP according to the current oil temperature includes:

3. The oil pump solenoid valve control method according to claim 1, characterized in that after said determining a basic duty ratio from said target oil pressure, the valve element controlling the oil pump solenoid valve moves according to said basic duty ratio, the oil pump solenoid valve control method further comprises:

4. The oil pump solenoid valve control method according to claim 3, characterized in that the determining a target duty ratio based on the actual oil pressure and the target oil pressure includes:

5. The oil pump solenoid valve control method according to claim 3, wherein the controlling the spool of the oil pump solenoid valve to move according to the target duty ratio includes:

6. The oil pump solenoid valve control method according to claim 5, wherein the oil pressure detection based on the actual oil pressure, obtaining an oil pressure detection result, comprises:

7. The oil pump solenoid valve control method according to claim 3, wherein the receiving actual oil pressure, determining a target duty ratio based on the actual oil pressure and the target oil pressure, and after controlling the spool of the oil pump solenoid valve to move according to the target duty ratio, the oil pump solenoid valve control method further comprises:

acquiring the current state of an engine;

8. The oil pump solenoid valve control method according to claim 1, characterized in that before the current operating condition data is acquired, the oil pump solenoid valve control method further comprises:

acquiring at least one sensing component state;

9. An in-vehicle controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the oil pump solenoid valve control method according to any one of claims 1 to 8 when executing the computer program.

10. An automobile comprising an engine provided with an oil pump solenoid valve, and further comprising the vehicle-mounted controller of claim 9.