Control method for increasing engine oil pressure at idle

Abstract

The present application relates to the control method of engine idle speed to improve the oil pressure, comprising the following steps: collecting the engine state; if the engine state is in the low idle state, collecting the engine oil pressure value; if the oil pressure value is lower than the first oil pressure threshold, increasing the engine speed; counting the duration; if the duration is not lower than the duration threshold, if the oil pressure value is not lower than the second oil pressure threshold, ending and exiting the flow of the control method; if the oil pressure value is lower than the third oil pressure threshold, ending and exiting the flow of the control method; the present application does not need to replace the hardware, and is universal and has strong universality; the engine speed is automatically increased to improve the idle oil pressure; the problem that the higher oil pressure cannot be maintained at the lower speed under the idle working condition is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine, in particular to a control method for improving engine oil pressure by engine idling. BACKGROUND

[0002] As the main unit of power output, the fuel engine is one of the most important parts of the motor vehicle. After the driver starts the engine, in the no-load running state, the engine is separated from the transmission system and the accelerator pedal is completely released. The engine only runs against its own resistance and does not output torque to the subsequent transmission system. At this time, the engine will maintain a stable speed. At this time, the engine is in idle condition.

[0003] The oil in the automobile engine plays the functions of lubrication, cooling and cleaning, which will directly affect the performance and service life of the engine. When the automobile is running, the oil pressure should be maintained at 200kPa-500kPa, wherein:

[0004] When the engine temperature is high and the speed is low, the oil pressure is not lower than 200kPa. When the engine temperature is low and the speed is high, the oil pressure is not higher than 500kPa. The oil pressure of the engine idling is not lower than 70kPa. The values of oil pressure for different vehicle models are different, but the principles are the same.

[0005] The problem of the above index is that the oil pressure cannot be maintained at a high level at a low speed in the idle condition.

[0006] In order to solve the technical problem, there are two ideas in the prior art, namely replacing hardware or manually adjusting the idle pressure.

[0007] The problem of the prior art is that if the hardware is replaced, not only the hardware cost is increased, but also the disassembly of the core components of the vehicle is involved. At the same time, the replaced hardware cannot be universal and has poor universality.

[0008] If it is manually adjusted, it is actually impossible for the driver to achieve it during the operation of the vehicle.

[0009] Therefore, how to use more advanced technology to replace the traditional method to improve the stability of the oil pressure at low idle speed of the engine has become a problem to be solved. SUMMARY

[0010] The present application is aimed at the above problems, and provides a control method for improving engine oil pressure by engine idling, which aims to replace hardware without universal and strong universality, automatically improve engine speed and thus improve idle oil pressure, and effectively solve the problem that the oil pressure cannot be maintained at a high level at a low speed in the idle condition.

[0011] To solve the above problems, the technical scheme provided by the present application is:

[0012] A control method for increasing engine oil pressure at idle speed, comprising the following steps:

[0013] S100. Collecting engine state; the engine state includes low idle state;

[0014] S200. According to the engine state, the following operations are performed:

[0015] If the engine state is in the low idle state, S300 is performed;

[0016] If the engine state is not in the low idle state, return to S100 and perform again;

[0017] S300. Collecting engine oil pressure value;

[0018] S400. Comparing the oil pressure value with the first oil pressure threshold value set artificially; then according to the comparison result, the following operations are performed:

[0019] If the oil pressure value is lower than the first oil pressure threshold value, S500 is performed;

[0020] If the oil pressure value is not lower than the first oil pressure threshold value, return to S100 and perform again;

[0021] S500. Controlling the engine to increase the engine speed at an artificially preset engine speed increase rate until the engine speed is not lower than the artificially preset engine speed threshold value;

[0022] S600. Statistics of the duration that the current engine speed is not lower than the engine speed threshold value;

[0023] S700. Comparing the duration with the duration threshold value set artificially; then according to the comparison result, the following operations are performed:

[0024] If the duration is lower than the duration threshold value, return to S500 and perform again;

[0025] If the duration is not lower than the duration threshold value, S800 is performed;

[0026] S800. Collecting the oil pressure value of the engine again;

[0027] S900. Comparing the oil pressure value with the second oil pressure threshold value set artificially; then according to the comparison result, the following operations are performed:

[0028] If the engine oil pressure value is not lower than the second engine oil pressure threshold value, the flow of the present control method is ended and exited.

[0029] If the engine oil pressure value is lower than the second engine oil pressure threshold value, the engine is controlled to increase the engine speed; and then S1000 is executed.

[0030] S1000. The engine oil pressure value of the engine is collected again.

[0031] S1100. The engine oil pressure value is compared with a third engine oil pressure threshold value preset artificially; and then according to the comparison result, the following operation is made:

[0032] If the engine oil pressure value is lower than the third engine oil pressure threshold value, the flow of the present control method is ended and exited.

[0033] If the engine oil pressure value is not lower than the third engine oil pressure threshold value, S800 is returned and executed again.

[0034] Preferably, the first engine oil pressure threshold value is 80 kpa.

[0035] Preferably, the engine speed increasing rate is 50 rpm / s.

[0036] Preferably, the engine speed threshold value is 750 rpm.

[0037] Preferably, the duration threshold value is 120 s.

[0038] Preferably, the second engine oil pressure threshold value is 90 kpa.

[0039] Preferably, the third engine oil pressure threshold value is 70 kpa.

[0040] Compared with the prior art, the present application has the following advantages:

[0041] 1. Since the present application controls the engine to increase the engine oil pressure through the ECU, no hardware needs to be replaced, and the application is universal and has strong applicability.

[0042] 2. Since the present application uses the engine speed to adapt the engine oil pressure in real time, the engine speed can be automatically increased to increase the idle engine oil pressure.

[0043] 3. The present application can effectively solve the problem that the engine oil pressure cannot be maintained at a high level at a low idle speed. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is a control method flowchart of a specific embodiment of the present application. DETAILED DESCRIPTION

[0045] The present application will be further illustrated by the following specific examples, which are intended to be illustrative only and not limiting of the scope of the present application. After reading the present application, those skilled in the art will be able to affect various modifications to the present application. Such modifications are intended to fall within the scope of the claims appended hereto.

[0046] As shown in FIG. 1, a control method for increasing oil pressure of an engine at idle speed comprises the following steps: Figure 1

[0047] S100. Collecting engine state; the engine state comprises low idle state.

[0048] S200. According to the engine state, the following operations are performed:

[0049] If the engine state is in the low idle state, S300 is performed.

[0050] If the engine state is not in the low idle state, return to and perform S100 again.

[0051] S300. Collecting oil pressure value of the engine.

[0052] S400. Comparing the oil pressure value with a first oil pressure threshold value preset artificially; then according to the comparison result, the following operations are performed:

[0053] If the oil pressure value is lower than the first oil pressure threshold value, S500 is performed.

[0054] If the oil pressure value is not lower than the first oil pressure threshold value, return to and perform S100 again.

[0055] In the specific embodiment, the first oil pressure threshold value is 80 kPa.

[0056] S500. Controlling the engine to increase engine speed at an engine speed increasing rate preset artificially until the engine speed is not lower than an engine speed threshold value preset artificially.

[0057] In the specific embodiment, the engine speed increasing rate is 50 rpm / s.

[0058] In the specific embodiment, the engine speed threshold value is 750 rpm.

[0059] It should be noted that the function of S500 is to increase the oil pressure value by increasing the engine speed.

[0060] S600. Counting the duration that the current engine speed is not lower than the engine speed threshold value.

[0061] ​S700. Compare the duration with a manually preset duration threshold value; and then according to the comparison result, the following operations are made:

[0062] If the duration is lower than the duration threshold value, return and execute S500 again.

[0063] If the duration is not lower than the duration threshold value, execute S800.

[0064] In the embodiment, the duration threshold value is 120s.

[0065] It should be noted that if the duration is not lower than the duration threshold value, it can be determined that the engine oil temperature, engine oil viscosity and engine oil pressure at this time have been stabilized, and this is the best time to determine whether the engine oil pressure value is raised to the second engine oil pressure threshold value.

[0066] S800. Collect the engine oil pressure value of the engine again.

[0067] S900. Compare the engine oil pressure value with a manually preset second engine oil pressure threshold value; and then according to the comparison result, the following operations are made:

[0068] If the engine oil pressure value is not lower than the second engine oil pressure threshold value, end and exit the flow of the control method.

[0069] If the engine oil pressure value is lower than the second engine oil pressure threshold value, control the engine to raise the engine speed; and then execute S1000.

[0070] It should be noted that if the engine oil pressure value is not lower than the second engine oil pressure threshold value, it can be determined that the engine oil pressure value at this time can meet the reliability requirements of the engine, so the flow of the control method can be directly ended and exited; but if the engine oil pressure value is lower than the second engine oil pressure threshold value, the idle raising state needs to be continued.

[0071] In the embodiment, the second engine oil pressure threshold value is 90kpa.

[0072] S1000. Collect the engine oil pressure value of the engine again.

[0073] S1100. Compare the engine oil pressure value with a manually preset third engine oil pressure threshold value; and then according to the comparison result, the following operations are made:

[0074] If the engine oil pressure value is lower than the third engine oil pressure threshold value, end and exit the flow of the control method.

[0075] If the engine oil pressure value is not lower than the third engine oil pressure threshold value, return and execute S800 again.

[0076] In this specific embodiment, the third oil pressure threshold is 70 kPa.

[0077] It should be noted that the function of S1000 to S1100 is as follows: if the oil pressure does not increase with the engine speed after the idle speed is increased, but instead decreases, it can be determined that the oil pressure is abnormal and oil leakage may have occurred. Increasing the engine speed further may damage the engine. Therefore, if the oil pressure is lower than the third oil pressure threshold, the process of this control method needs to be terminated and exited, and an oil leak alarm should be issued to notify professional personnel to intervene.

[0078] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features of the single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, wherein each claim stands alone as a preferred embodiment of the invention.

[0079] The disclosed embodiments have been described above to enable any person 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 herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0080] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0081] The above detailed description of the specific embodiments of the present application has been given to understand the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control method for increasing engine oil pressure at engine idle speed, characterized in that: Includes the following steps: S100. Collect engine status; the engine status includes low idle speed status; S200. Based on the engine status, perform the following operations: If the engine is in the low idle state, then execute S300; If the engine is not in the low idle state, return and execute S100 again; S300. Collects the engine oil pressure value; S400. Compare the oil pressure value with a manually preset first oil pressure threshold; then, based on the comparison result, perform the following operations: If the oil pressure value is lower than the first oil pressure threshold, then execute S500; If the oil pressure value is not lower than the first oil pressure threshold, then return and execute S100 again; S500. Control the engine to increase the engine speed at a manually preset engine speed increase rate until the engine speed is not lower than the manually preset engine speed threshold. S600. Count the duration during which the current engine speed is not lower than the engine speed threshold; S700. Compare the duration with a manually preset duration threshold; then, based on the comparison result, perform the following operations: If the duration is lower than the duration threshold, return and execute S500 again; If the duration is not less than the duration threshold, then execute S800; S800. Collect the engine oil pressure value again; S900. Compare the oil pressure value with a manually preset second oil pressure threshold; then, based on the comparison result, perform the following operations: If the oil pressure value is not lower than the second oil pressure threshold, the process of this control method ends and exits. If the oil pressure value is lower than the second oil pressure threshold, the engine speed is increased; then S1000 is executed. S1000. Collect the engine oil pressure value again; S1100. Compare the oil pressure value with a manually preset third oil pressure threshold; then, based on the comparison result, perform the following operations: If the oil pressure value is lower than the third oil pressure threshold, the process of this control method ends and exits, and an oil leak alarm is issued at the same time. If the oil pressure value is not lower than the third oil pressure threshold, then return and execute S800 again.

2. The control method for increasing oil pressure by increasing engine idle speed according to claim 1, characterized in that: The first oil pressure threshold is 80 kPa.

3. The control method for increasing oil pressure by increasing engine idle speed according to claim 2, characterized in that: The engine speed increase rate is 50 rpm / s.

4. The control method for increasing oil pressure by increasing engine idle speed according to claim 3, characterized in that: The engine speed threshold is 750 rpm.

5. The control method for increasing oil pressure by increasing engine idle speed according to claim 4, characterized in that: The duration threshold is 120 seconds.

6. The control method for increasing oil pressure by means of engine idling speed according to claim 5, characterized in that: The second oil pressure threshold is 90 kPa.

7. The control method for increasing oil pressure by means of engine idling speed according to claim 6, characterized in that: The third oil pressure threshold is 70 kPa.

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