Supercharger lubrication control method and related device

Abstract

The present invention discloses a supercharger lubrication control method and related devices. When the engine is running under full working conditions, the oil temperature correction map is queried according to the current oil temperature and the current circulating fuel injection amount to obtain the oil temperature correction factor; according to the current engine speed and the current circulating fuel injection amount, the opening feedforward map is queried to obtain the throttle valve feedforward opening; according to the current speed of the supercharger, the oil supply pressure CUR is queried to obtain the required oil supply pressure; the required oil supply pressure and the current actual oil supply pressure of the supercharger are input into the PID controller to obtain the first throttle valve opening; according to the oil temperature correction factor and the throttle valve feedforward opening, the first throttle valve opening is corrected to obtain the second throttle valve opening. The present invention does not require an external oil storage chamber, and controls the opening of the electronically controlled throttle valve based on the current oil temperature, the current circulating fuel injection amount, the current engine speed and the current supercharger speed, so as to meet the reliable lubrication requirements of the bearing under changing working conditions, and has high robustness.

Description

Technical Field

[0001] The invention relates to the field of engines, and in particular to a supercharger lubrication control method and related devices. Background Art

[0002] The turbocharger of a diesel engine is an important core component of the diesel engine. Its operating speed and bearing load are getting higher and higher. The fundamental reason for the damage of the turbocharger is that when the oil pressure of the diesel engine is insufficient, the lubricating oil inside the turbocharger is not supplied in time, causing a large amount of heat accumulation in the friction part and sintering of the bearing, causing the turbocharger to fail.

[0003] The traditional solution is to add an external oil storage chamber above the turbocharger. When the oil pressure is insufficient, the oil in the oil storage chamber's lubricating oil tank is compressed by the built-in piston and enters the turbocharger oil supply line to lubricate the built-in bearing. However, the external oil storage chamber of this solution will occupy the layout space of the entire machine, resulting in poor compactness of the diesel engine structure; at the same time, due to the limitations of the oil storage chamber space and piston stroke, the oil supply pressure is difficult to meet the reliable lubrication requirements of the bearing under changing working conditions, resulting in insufficient robustness of the lubrication system. Summary of the invention

[0004] In view of the above problems, the present invention provides a supercharger lubrication control method and related devices that overcome the above problems or at least partially solve the above problems.

[0005] In a first aspect, a supercharger lubrication control method comprises:

[0006] When the engine is running at full working conditions, the pre-calibrated oil temperature correction map is queried according to the current oil temperature of the engine and the current cycle injection amount to obtain the oil temperature correction factor;

[0007] According to the current speed of the engine and the current cycle fuel injection amount, a pre-calibrated opening feedforward map is queried to obtain a throttle valve feedforward opening;

[0008] According to the current speed of the supercharger, the pre-calibrated oil supply pressure CUR is queried to obtain the required oil supply pressure corresponding to the supercharger;

[0009] Inputting the required oil supply pressure and the actual oil supply pressure of the supercharger into a PID controller to obtain a first throttle valve opening of an output closed loop of the PID controller;

[0010] The first throttle valve opening is corrected according to the oil temperature correction factor and the throttle valve feedforward opening to obtain a second throttle valve opening, so as to control the opening of the electronically controlled throttle valve arranged at the oil return outlet of the supercharger to the second throttle valve opening.

[0011] Optionally, in some optional embodiments, the first throttle valve opening is corrected according to the engine oil temperature correction factor and the throttle valve feedforward opening to obtain a second throttle valve opening, so as to control the opening of the electronically controlled throttle valve provided at the oil return outlet of the supercharger to the second throttle valve opening, including:

[0012] Multiplying the oil temperature correction factor and the throttle valve feedforward opening to obtain a corresponding product;

[0013] adding the product to the first throttle valve opening to obtain a corresponding second throttle valve opening;

[0014] The opening degree of the electronically controlled throttle valve provided at the oil return outlet of the supercharger is controlled to be the second throttle valve opening degree.

[0015] Optionally, in some optional embodiments, the method further comprises:

[0016] When the engine is stopped, the opening of the electronically controlled throttle valve is controlled to be 0, so that the engine oil is stored in the oil passage and the oil return chamber inside the supercharger, forming an immersion lubrication for the bearings and moving parts.

[0017] Optionally, in some optional embodiments, the method further comprises:

[0018] While controlling the opening of the electronically controlled throttle valve to be 0, the oil drain solenoid valve on the supercharger oil drain branch pipe is controlled to open, so that the excess oil flows back to the oil tank through the oil drain branch pipe.

[0019] Optionally, in some optional embodiments, the method further comprises:

[0020] When the engine is started, the opening of the electronically controlled throttle valve is controlled to be the third throttle valve opening, so that the oil pump circulates the oil normally for lubrication.

[0021] In a second aspect, a supercharger lubrication control device includes: a correction factor query unit, a feedforward opening query unit, an oil supply pressure query unit, a first opening acquisition unit, and a second opening acquisition unit;

[0022] The correction factor query unit is used to query a pre-calibrated oil temperature correction map according to the current oil temperature and current cycle injection amount of the engine to obtain the oil temperature correction factor when the engine is running under full working conditions;

[0023] The feedforward opening query unit is used to query a pre-calibrated opening feedforward map according to the current speed of the engine and the current cycle injection amount to obtain the throttle valve feedforward opening;

[0024] The oil supply pressure query unit is used to query the pre-calibrated oil supply pressure CUR according to the current speed of the supercharger to obtain the required oil supply pressure corresponding to the supercharger;

[0025] The first opening obtaining unit is used to input the required oil supply pressure and the current actual oil supply pressure of the supercharger into the PID controller to obtain the first throttle valve opening of the PID controller output closed loop;

[0026] The second opening obtaining unit is used to correct the first throttle valve opening according to the oil temperature correction factor and the throttle valve feedforward opening to obtain the second throttle valve opening, so as to control the opening of the electronically controlled throttle valve arranged at the return oil outlet of the supercharger to the second throttle valve opening.

[0027] Optionally, in some optional embodiments, the second opening degree obtaining unit includes: a multiplication calculation subunit, an addition calculation subunit and an opening degree control subunit;

[0028] The multiplication calculation subunit is used to multiply the engine oil temperature correction factor and the throttle valve feedforward opening to obtain a corresponding product;

[0029] The addition calculation subunit is used to add the product to the first throttle valve opening to obtain a corresponding second throttle valve opening;

[0030] The opening control subunit is used to control the opening of the electronically controlled throttle valve provided at the oil return outlet of the supercharger to the second throttle valve opening.

[0031] Optionally, in certain optional embodiments, the device further comprises: a parking opening control unit;

[0032] The parking opening control unit is used to control the opening of the electronically controlled throttle valve to 0 when the engine is stopped, so that the engine oil is stored in the oil channel and oil return chamber inside the supercharger to form immersion lubrication for the bearings and moving parts.

[0033] In a third aspect, a computer-readable storage medium stores a program, wherein the program, when executed by a processor, implements any of the above-mentioned supercharger lubrication control methods.

[0034] In a fourth aspect, an electronic device comprises at least one processor, and at least one memory and a bus connected to the processor; wherein the processor and the memory communicate with each other via the bus; and the processor is used to call program instructions in the memory to execute any of the above-mentioned supercharger lubrication control methods.

[0035] By means of the above technical scheme, a supercharger lubrication control method and related devices provided by the present invention can query a pre-calibrated oil temperature correction map according to the current oil temperature and the current cycle injection amount of the engine to obtain an oil temperature correction factor when the engine is running under full working conditions; query a pre-calibrated opening feedforward map according to the current speed of the engine and the current cycle injection amount to obtain a throttle valve feedforward opening; query a pre-calibrated oil supply pressure CUR according to the current speed of the supercharger to obtain a required oil supply pressure corresponding to the supercharger; input the required oil supply pressure and the current actual oil supply pressure of the supercharger into a PID controller to obtain a first throttle valve opening of the PID controller output closed loop; correct the first throttle valve opening according to the oil temperature correction factor and the throttle valve feedforward opening to obtain a second throttle valve opening, so as to control the opening of the electronically controlled throttle valve arranged at the oil return outlet of the supercharger to the second throttle valve opening. It can be seen from this that the present invention does not require an external oil storage chamber. It only needs to set an electronically controlled throttle valve at the original oil return outlet of the supercharger, and then control the opening of the electronically controlled throttle valve based on parameters such as the current oil temperature, the current cycle injection amount, the current speed of the engine and the current speed of the supercharger, thereby meeting the reliable lubrication requirements of the bearings under changing working conditions and having high robustness.

[0036] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 A flow chart showing a first supercharger lubrication control method provided by the present invention;

[0039] Figure 2 A structural diagram of a supercharger lubrication control system provided by the present invention is shown;

[0040] Figure 3 A flow chart showing a second supercharger lubrication control method provided by the present invention;

[0041] Figure 4 A control strategy diagram provided by the present invention is shown;

[0042] Figure 5 A schematic structural diagram of a supercharger lubrication control device provided by the present invention is shown;

[0043] Figure 6 A structural schematic diagram of an electronic device provided by the present invention is shown. DETAILED DESCRIPTION

[0044] The turbocharger of a diesel engine is an important core component of the diesel engine. Its operating speed and bearing load are getting higher and higher. The fundamental reason for the damage of the turbocharger is that when the oil pressure of the diesel engine is insufficient, the lubricating oil inside the turbocharger is not supplied in time, causing a large amount of heat accumulation in the friction part and sintering of the bearing, causing the turbocharger to fail.

[0045] The traditional solution is to add an external oil storage chamber above the turbocharger. When the oil pressure is insufficient, the oil in the oil storage chamber's lubricating oil tank is compressed by the built-in piston and enters the turbocharger oil supply line to lubricate the built-in bearing. However, the external oil storage chamber of this solution will occupy the layout space of the entire machine, resulting in poor compactness of the diesel engine structure; at the same time, due to the limitations of the oil storage chamber space and piston stroke, the oil supply pressure is difficult to meet the reliable lubrication requirements of the bearing under changing working conditions, resulting in insufficient robustness of the lubrication system.

[0046] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0047] like Figure 1 As shown, the present invention provides a supercharger lubrication control method, including: S100, S200, S300, S400 and S500;

[0048] S100, when the engine is running under full working conditions, querying a pre-calibrated oil temperature correction map according to the current oil temperature of the engine and the current cycle injection amount, to obtain an oil temperature correction factor;

[0049] Optionally, the supercharger lubrication control method of the present invention can be applied to Figure 2 The supercharger lubrication control system shown in the figure, wherein the system is composed of 1 oil inlet pipe, 2 oil pressure sensor, 3 supercharger, 4 electronically controlled throttle valve, 5 oil return pipe, 6 oil drain solenoid valve and 7 oil drain branch pipe. The vehicle-mounted ECU can execute the process of the present invention to ensure that the bearing of the supercharger is effectively lubricated, and the present invention is not limited to this.

[0050] Optionally, the engine may be in different operating conditions at different times. The present invention may perform corresponding controls for different situations such as parking (the process of the engine switching from running to stopping, and the whole process of maintaining stopping), starting (the process of the engine switching from stopping to full operating condition operation) and full operating condition operation (referring to the process of normal operation after the engine is started) to ensure that the bearings of the supercharger are effectively lubricated, and the present invention does not impose any limitation on this.

[0051] Optionally, under full operating conditions, the execution subject of the present invention can collect and obtain parameters such as the current oil temperature of the engine, the current cycle injection amount, the current speed of the engine and the current speed of the supercharger, and the present invention does not impose any limitation on this.

[0052] It should be noted that the oil temperature correction map refers to the oil temperature correction spectrum diagram obtained in advance through experiments, that is, the oil temperature correction map (sometimes also capitalized: MAP, which has the same meaning as map) is a three-dimensional spectrum diagram, and the present invention does not impose any limitation on this.

[0053] It should be noted that the on-board ECU refers to the computer on the car, also known as the driving computer, that is, the electronic control unit (ECU). The ECU takes signal (data) acquisition, calculation processing, analysis and judgment, and decision-making as input, and then issues control instructions and directs the actuator to work as output. Sometimes, it also provides a stable power supply or reference voltage to the sensor. All its functions are completed through the sum of various hardware and software, and its core is a microcomputer system with a single-chip microcomputer as the main body.

[0054] S200, querying a pre-calibrated opening feedforward map according to the current speed of the engine and the current cycle fuel injection amount to obtain a throttle valve feedforward opening;

[0055] Optionally, the opening feedforward map mentioned in the present invention is pre-calibrated for the electronically controlled throttle valve and is used to subsequently obtain the second throttle valve opening. The calibration process of the opening feedforward map is as follows: when the engine is running under a certain working condition and in an open-loop control state (that is, when the PID controller is not involved in the work), the actual fuel supply pressure is made consistent with the required fuel supply pressure by calibrating the corresponding feedforward opening value in the opening feedforward map.

[0056] Optional, oil temperature correction map calibration process, specifically: in the open-loop control state (that is, when the PID controller is not involved in the work), the opening feedforward map output value is corrected by calibrating the oil temperature correction map (correction coefficient in the calibration map) to ensure that when the oil temperature changes but the operating conditions remain unchanged, the actual oil supply pressure is consistent with the required oil supply pressure.

[0057] Optionally, the throttle valve feedforward opening is a parameter that describes the size of the advance opening angle of the electronically controlled throttle valve. The user subsequently uses this parameter to correct the opening of the electronically controlled throttle valve to improve the actual lubrication effect of the present invention, and the present invention does not impose any limitation on this.

[0058] It should be noted that the PID controller (Proportion Integration Differentiation) is composed of a proportional unit (P), an integral unit (I) and a differential unit (D). Through the setting of three parameters Kp, Ki and Kd, the PID controller is mainly suitable for systems that are basically linear and whose dynamic characteristics do not change with time.

[0059] S300, querying a pre-calibrated oil supply pressure CUR according to the current speed of the supercharger to obtain a required oil supply pressure corresponding to the supercharger;

[0060] Optionally, the fuel supply pressure CUR is also pre-calibrated. The specific calibration process is: for the fuel supply pressure CUR, change different working conditions to make the supercharger speed at different speed values, and fill the corresponding oil pressure of the main oil channel of the engine in the steady state into the fuel supply pressure CUR.

[0061] Optionally, the required oil supply pressure reflects the oil inlet pressure (pressure of the lubricating oil inlet) required by the supercharger. The required oil supply pressure obtained by querying the oil supply pressure CUR can be used for subsequent input to the PID controller to obtain the first throttle valve opening output by the PID controller, and the present invention does not limit this.

[0062] It should be noted that the oil supply pressure CUR refers to a two-dimensional curve graph obtained in advance through experiments, that is, CUR is the abbreviation of the word curve, and the present invention does not impose any limitation on this.

[0063] S400, inputting the required oil supply pressure and the current actual oil supply pressure of the supercharger into a PID controller to obtain a first throttle valve opening of an output closed loop of the PID controller;

[0064] Optionally, the actual current fuel supply pressure of the supercharger can be acquired in real time by a sensor, or can be directly acquired by reading relevant parameters recorded in the ECU, and the present invention does not impose any limitation on this.

[0065] Optionally, the present invention can first model the PID controller, with the input being the difference between the required oil supply pressure and the actual measured oil supply pressure, and the output being the valve opening change value corresponding to the pressure difference value, and the addition of the opening change value and the corrected feedforward value being the final execution opening of the valve. The flow of the oil return line is adjusted by the valve opening change driven by such a negative feedback pressure difference, and the actual oil supply pressure is equal to the set pressure after multiple iterations, and the present invention does not limit this.

[0066] S500. According to the engine oil temperature correction factor and the throttle valve feedforward opening, the first throttle valve opening is corrected to obtain a second throttle valve opening, so as to control the opening of the electronically controlled throttle valve arranged at the oil return outlet of the supercharger to the second throttle valve opening.

[0067] For example, Figure 3 As shown, in some optional implementations, the S500 includes: S510, S520 and S530;

[0068] S510, multiplying the engine oil temperature correction factor and the throttle valve feedforward opening to obtain a corresponding product;

[0069] S520, adding the product to the first throttle valve opening to obtain a corresponding second throttle valve opening;

[0070] S530: Control the opening of the electronically controlled throttle valve disposed at the oil return outlet of the supercharger to be the second throttle valve opening.

[0071] Optionally, the opening output by the PID controller is the opening change value Δr calculated by the model based on the pressure difference. This value added to the corrected throttle valve feedforward opening is the final opening that the valve should execute. This opening change value can be considered as an adjustment of the feedforward opening based on the pressure difference, and the present invention does not impose any restrictions on this.

[0072] Optional, pre-control opening based PID has faster response than normal PID closed loop control and more precise control of transient supercharger lubrication supply pressure.

[0073] Optionally, in order to more clearly describe the execution process of full-operation operation, the present invention provides the following Figure 4 The control strategy diagram shown in the figure, please refer to the above explanation for the content of the diagram, and the present invention will not elaborate on it.

[0074] Optionally, as mentioned above, different strategies can be used to lubricate the supercharger when the engine is in different working conditions. The following describes the execution process when the engine is stopped and when the engine is started, respectively, and the present invention does not limit this.

[0075] Optionally, in certain optional embodiments, the method further comprises: step 1.1;

[0076] Step 1.1, when the engine is stopped, control the opening of the electronically controlled throttle valve to 0, so that the engine oil is stored in the oil passage and oil return chamber inside the supercharger, forming immersion lubrication for the bearings and moving parts.

[0077] Optionally, in certain optional embodiments, the method further comprises: step 2.1;

[0078] Step 2.1, while controlling the opening of the electronically controlled throttle valve to be 0, control the oil drain solenoid valve on the supercharger oil drain branch pipe to open, so that excess oil flows back to the oil tank through the oil drain branch pipe.

[0079] Optionally, during the engine shutdown phase, the electronically controlled throttle valve installed at the oil return outlet is completely closed, and the engine oil is stored in the oil channel and oil return chamber inside the supercharger, forming immersion lubrication for the bearings and moving parts. At the same time, the oil drain solenoid valve is opened, and excess oil flows back to the fuel tank through the oil drain branch pipe.

[0080] Optionally, in certain optional embodiments, the method further comprises: step 3.1;

[0081] Step 3.1: When the engine is started, the opening of the electronically controlled throttle valve is controlled to be a third throttle valve opening, so that the oil pump circulates the oil normally for lubrication.

[0082] Optionally, during the engine start-up phase, the supercharger begins to rotate, the bearings immersed in the engine oil are fully lubricated, the electronically controlled throttle valve is partially opened, and the oil pump circulates the lubricating oil normally.

[0083] like Figure 5 As shown, the present invention provides a supercharger lubrication control device, comprising: a correction factor query unit 100, a feedforward opening query unit 200, an oil supply pressure query unit 300, a first opening acquisition unit 400 and a second opening acquisition unit 500;

[0084] The correction factor query unit 100 is used to query a pre-calibrated oil temperature correction map according to the current oil temperature and current cycle injection amount of the engine to obtain an oil temperature correction factor when the engine is running under full working conditions;

[0085] The feedforward opening query unit 200 is used to query a pre-calibrated opening feedforward map according to the current speed of the engine and the current cycle injection amount to obtain the throttle valve feedforward opening;

[0086] The oil supply pressure query unit 300 is used to query the pre-calibrated oil supply pressure CUR according to the current speed of the supercharger to obtain the required oil supply pressure corresponding to the supercharger;

[0087] The first opening obtaining unit 400 is used to input the required oil supply pressure and the current actual oil supply pressure of the supercharger into the PID controller to obtain the first throttle valve opening of the PID controller output closed loop;

[0088] The second opening obtaining unit 500 is used to correct the first throttle valve opening according to the oil temperature correction factor and the throttle valve feedforward opening to obtain the second throttle valve opening, so as to control the opening of the electronically controlled throttle valve arranged at the return oil outlet of the supercharger to the second throttle valve opening.

[0089] Optionally, in some optional embodiments, the second opening degree obtaining unit 500 includes: a multiplication calculation subunit, an addition calculation subunit and an opening degree control subunit;

[0090] The multiplication calculation subunit is used to multiply the engine oil temperature correction factor and the throttle valve feedforward opening to obtain a corresponding product;

[0091] The addition calculation subunit is used to add the product to the first throttle valve opening to obtain a corresponding second throttle valve opening;

[0092] The opening control subunit is used to control the opening of the electronically controlled throttle valve provided at the oil return outlet of the supercharger to the second throttle valve opening.

[0093] Optionally, in certain optional embodiments, the device further comprises: a parking opening control unit;

[0094] The parking opening control unit is used to control the opening of the electronically controlled throttle valve to 0 when the engine is stopped, so that the engine oil is stored in the oil channel and oil return chamber inside the supercharger to form immersion lubrication for the bearings and moving parts.

[0095] Optionally, in certain optional embodiments, the device further comprises: an oil drain valve control unit;

[0096] The oil drain valve control unit is used to control the oil drain solenoid valve on the supercharger oil drain branch pipe to open while controlling the opening of the electronically controlled throttle valve to be 0, so that excess oil can flow back to the oil tank through the oil drain branch pipe.

[0097] Optionally, in certain optional embodiments, the device further comprises: a starting opening control unit;

[0098] The starting opening control unit is used to control the opening of the electronically controlled throttle valve to be a third throttle valve opening when the engine is started, so that the oil pump can circulate the oil normally for lubrication.

[0099] The present invention provides a computer-readable storage medium having a program stored thereon, wherein when the program is executed by a processor, the supercharger lubrication control method described in any one of the above items is implemented.

[0100] like Figure 6 As shown, the present invention provides an electronic device 70, which includes at least one processor 701, and at least one memory 702 and a bus 703 connected to the processor 701; wherein the processor 701 and the memory 702 communicate with each other through the bus 703; the processor 701 is used to call the program instructions in the memory 702 to execute any of the supercharger lubrication control methods described above.

[0101] In the present invention, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0102] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0103] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined in the present invention may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in the present invention, but will conform to the widest scope consistent with the principles and novel features disclosed in the present invention.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A supercharger lubrication control method, characterized in that: include: When the engine is running at full working conditions, the pre-calibrated oil temperature correction map is queried according to the current oil temperature of the engine and the current cycle injection amount to obtain the oil temperature correction factor; According to the current speed of the engine and the current cycle fuel injection amount, a pre-calibrated opening feedforward map is queried to obtain a throttle valve feedforward opening; According to the current speed of the supercharger, the pre-calibrated oil supply pressure CUR is queried to obtain the required oil supply pressure corresponding to the supercharger; Inputting the required oil supply pressure and the actual oil supply pressure of the supercharger into a PID controller to obtain a first throttle valve opening of an output closed loop of the PID controller; The first throttle valve opening is corrected according to the oil temperature correction factor and the throttle valve feedforward opening to obtain a second throttle valve opening, so as to control the opening of the electronically controlled throttle valve arranged at the oil return outlet of the supercharger to the second throttle valve opening.

2. The method according to claim 1, characterized in that The first throttle valve opening is corrected according to the engine oil temperature correction factor and the throttle valve feedforward opening to obtain a second throttle valve opening, so as to control the opening of the electronically controlled throttle valve disposed at the oil return outlet of the supercharger to be the second throttle valve opening, comprising: Multiplying the oil temperature correction factor and the throttle valve feedforward opening to obtain a corresponding product; adding the product to the first throttle valve opening to obtain a corresponding second throttle valve opening; The opening degree of the electronically controlled throttle valve provided at the oil return outlet of the supercharger is controlled to be the second throttle valve opening degree.

3. The method according to claim 1, characterized in that The method further comprises: When the engine is stopped, the opening of the electronically controlled throttle valve is controlled to be 0, so that the engine oil is stored in the oil passage and the oil return chamber inside the supercharger, forming an immersion lubrication for the bearings and moving parts.

4. The method according to claim 3, characterized in that The method further comprises: While controlling the opening of the electronically controlled throttle valve to be 0, the oil drain solenoid valve on the supercharger oil drain branch pipe is controlled to open, so that the excess oil flows back to the oil tank through the oil drain branch pipe.

5. The method according to claim 1, characterized in that The method further comprises: When the engine is started, the opening of the electronically controlled throttle valve is controlled to be the third throttle valve opening, so that the oil pump circulates the oil normally for lubrication.

6. A supercharger lubrication control device, characterized in that: include: A correction factor query unit, a feedforward opening query unit, an oil supply pressure query unit, a first opening obtaining unit and a second opening obtaining unit; The correction factor query unit is used to query a pre-calibrated oil temperature correction map according to the current oil temperature and current cycle injection amount of the engine to obtain the oil temperature correction factor when the engine is running under full working conditions; The feedforward opening query unit is used to query a pre-calibrated opening feedforward map according to the current speed of the engine and the current cycle injection amount to obtain the throttle valve feedforward opening; The oil supply pressure query unit is used to query the pre-calibrated oil supply pressure CUR according to the current speed of the supercharger to obtain the required oil supply pressure corresponding to the supercharger; The first opening obtaining unit is used to input the required oil supply pressure and the current actual oil supply pressure of the supercharger into the PID controller to obtain the first throttle valve opening of the PID controller output closed loop; The second opening obtaining unit is used to correct the first throttle valve opening according to the oil temperature correction factor and the throttle valve feedforward opening to obtain the second throttle valve opening, so as to control the opening of the electronically controlled throttle valve arranged at the return oil outlet of the supercharger to the second throttle valve opening.

7. The device according to claim 6, characterized in that The second opening degree obtaining unit includes: a multiplication calculation subunit, an addition calculation subunit and an opening degree control subunit; The multiplication calculation subunit is used to multiply the engine oil temperature correction factor and the throttle valve feedforward opening to obtain a corresponding product; The addition calculation subunit is used to add the product to the first throttle valve opening to obtain a corresponding second throttle valve opening; The opening control subunit is used to control the opening of the electronically controlled throttle valve provided at the oil return outlet of the supercharger to the second throttle valve opening.

8. The device according to claim 6, characterized in that The device further comprises: a parking opening control unit; The parking opening control unit is used to control the opening of the electronically controlled throttle valve to 0 when the engine is stopped, so that the engine oil is stored in the oil channel and oil return chamber inside the supercharger to form immersion lubrication for the bearings and moving parts.

9. A computer-readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the supercharger lubrication control method according to any one of claims 1 to 5 is implemented.

10. An electronic device, characterized in that: The electronic device includes at least one processor, and at least one memory and a bus connected to the processor; wherein the processor and the memory communicate with each other via the bus; the processor is used to call program instructions in the memory to execute the supercharger lubrication control method as described in any one of claims 1 to 5.

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