Engine oil pressure linkage starting control strategy

Abstract

The invention discloses an engine oil pressure linkage starting control strategy, relates to an engine control technology, and solves the technical problems that a lubricating oil film of an existing high-power and large-cylinder-diameter diesel engine needs long time and is difficult to establish, and the hidden danger that the oil pressure of an engine starter is low exists. The strategy comprises the steps that real-time engine oil pressure and real-time engine oil temperature are obtained, and pre-oil supply is conducted according to the real-time engine oil pressure and the real-time engine oil temperature; according to the real-time engine oil pressure and the real-time engine oil temperature, whether the starting oil pressure requirement is met or not is judged, and when the starting oil pressure requirement is met, the engine is started successfully; and when the starting oil pressure requirement is not met, a motor dragging time adjusting method is triggered and started according to the real-time engine oil pressure and the real-time engine oil temperature. The method can improve the starting efficiency of the engine, reduce the wear of the engine, optimize the energy use, improve the performance of the starting motor, enhance the safety of the starting system and improve the diagnosis and troubleshooting capabilities.

Description

Technical Field

[0001] The present invention relates to engine control technology, and more particularly to an engine oil pressure linked starting control strategy. Background Art

[0002] High-power, large-bore diesel engines require pre-oiling before starting and cranking. This ensures a secure lubricating film is established across the moving parts during cranking, thereby ensuring safe engine operation and preventing mechanical problems such as dry running. However, unlike traditional engines, these high-power, large-bore engines require longer and more difficult to establish a lubricating film, and this process can lead to low starting oil pressure. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the shortcomings of the existing technology and provide an engine oil pressure linkage starting control strategy to solve the technical problems that the existing high-power, large-cylinder diesel engines require a long time to establish a lubricating oil film, are difficult to establish, and have the hidden danger of low engine starting oil pressure.

[0004] The present invention describes an engine oil pressure-linked starting control strategy, which includes obtaining real-time oil pressure and real-time oil temperature, and performing pre-oil supply based on the real-time oil pressure and oil temperature; judging whether the starting oil pressure requirement is met based on the real-time oil pressure and real-time oil temperature, and when the starting oil pressure requirement is met, the engine is started successfully; when the starting oil pressure requirement is not met, triggering a starter motor drag time adjustment method based on the real-time oil pressure and real-time oil temperature.

[0005] As a further improvement, the starting oil pressure requirement is to set a starter oil pressure limit value, and the real-time engine oil pressure is greater than or equal to the starter oil pressure limit value.

[0006] Furthermore, when the real-time oil pressure is less than the starter oil pressure limit value, the preset oil pressure limit starter injection flag is set to position 1, so that the engine is started without injection.

[0007] Furthermore, the method for setting the starter oil pressure limit value is:

[0008] When the real-time engine oil temperature is greater than the preset engine oil pressure limit value oil temperature gear larger value, the starter oil pressure limit value is the preset starter oil pressure limit calibration smaller value;

[0009] When the real-time engine oil temperature is lower than the preset engine oil pressure limit value, the starter oil pressure limit value is equal to the preset starter oil pressure limit calibration value;

[0010] When the real-time oil temperature is greater than the oil pressure limit value oil temperature gear smaller value and less than the oil pressure limit value oil temperature larger value, the starter oil pressure limit value is the preset starter oil pressure limit calibration middle value.

[0011] Furthermore, the method for adjusting the starter motor drag time is:

[0012] When the real-time engine oil temperature is less than a minimum value of a preset engine oil temperature standard range, increasing the starter motor drag time to a preset first drag time so that the engine can be started at a slower speed;

[0013] When the real-time engine oil temperature is greater than a maximum value of a standard engine oil temperature range, reducing the starter motor drag time to a preset second drag time so that the engine can be started quickly;

[0014] When the real-time engine oil pressure is less than a minimum value of a preset engine oil pressure standard range, increasing the starter motor drag time to a preset third drag time to allow more time for pressure to build up;

[0015] When the real-time engine oil pressure is greater than a maximum value of a standard range of engine oil pressure, the starter motor drag time is reduced to a preset fourth drag time to prevent overload.

[0016] Furthermore, after completing the starter motor drag time adjustment method, the real-time oil pressure and real-time oil temperature are remeasured. When the remeasured real-time oil pressure is still less than the starter oil pressure limit value, a low oil pressure alarm and a start failure alarm are activated.

[0017] Beneficial effects

[0018] The advantages of the present invention are:

[0019] The present invention obtains real-time oil pressure and real-time oil temperature, performs pre-oil supply according to the real-time oil pressure and oil temperature; determines whether the starting oil pressure requirement is met according to the real-time oil pressure and real-time oil temperature, and when the starting oil pressure requirement is met, the engine is started successfully; when the starting oil pressure requirement is not met, the starter motor drag time adjustment method is triggered according to the real-time oil pressure and real-time oil temperature, thereby improving engine starting efficiency, reducing engine wear, extending engine life, optimizing energy use, improving starter motor performance, enhancing the safety of the starting system, and improving diagnosis and troubleshooting capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a flow chart of the engine oil pressure linked starting control strategy of the present invention;

[0021] Figure 2 This is a test diagram of stopping injection when the real-time oil pressure is lower than the oil pressure limit value of the present invention;

[0022] Figure 3 This is a test diagram of the present invention in which the output oil volume is zero after the real-time oil pressure is lower than the oil pressure limit value. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the embodiments, but this does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0024] See Figure 1-Figure 3 The present invention provides an engine oil pressure linkage starting control strategy, which includes obtaining real-time oil pressure and real-time oil temperature, and performing pre-oil supply according to the real-time oil pressure and oil temperature; judging whether the starting oil pressure requirement is met according to the real-time oil pressure and real-time oil temperature, and successfully starting the engine when the starting oil pressure requirement is met; when the starting oil pressure requirement is not met, triggering a starter motor drag time adjustment method according to the real-time oil pressure and real-time oil temperature.

[0025] The starting oil pressure requirement is to set the starting oil pressure limit value and the real-time oil pressure is greater than or equal to the starting oil pressure limit value.

[0026] When the real-time oil pressure is lower than the starter oil pressure limit value, the preset oil pressure limit starter injection mark position is set to 1. At this time, during the engine start-up and dragging process, the ECU will not control the engine injection, so that the engine starts without injection.

[0027] The method for setting the starting oil pressure limit value is:

[0028] When the real-time engine oil temperature is greater than the preset engine oil pressure limit value, the starter oil pressure limit value is the preset starter oil pressure limit calibration smaller value.

[0029] When the real-time engine oil temperature is lower than the preset engine oil pressure limit value, the starter oil pressure limit value is equal to the preset starter oil pressure limit calibration larger value.

[0030] When the real-time engine oil temperature is greater than the smaller value of the engine oil pressure limit value and less than the larger value of the engine oil pressure limit value, the starter oil pressure limit value is the preset starter oil pressure limit calibration middle value.

[0031] For example, the oil pressure limit value is set to a lower value of 50°C for the oil temperature gear, the oil pressure limit value is set to a higher value of 70°C for the oil temperature gear, the starter oil pressure limit calibration is 120kPa, the starter oil pressure limit calibration is 80kPa, and the starter oil pressure limit calibration middle value is 100kPa.

[0032] like Figure 2-3 As shown, when the real-time temperature of the engine oil is lower than 50°C, the starter oil pressure limit value is 120kPa; when the real-time temperature of the engine oil is 60°C, the starter oil pressure limit value is 100kPa; when the real-time temperature of the engine oil is greater than 70°C, the starter oil pressure limit value is 80kPa. The experimental results are consistent with the calibration.

[0033] The method for adjusting the starter motor drag time is:

[0034] When the real-time engine oil temperature is less than a minimum value of a preset engine oil temperature standard range, the starter motor drag time is increased to a preset first drag time so that the engine can be started at a slower speed.

[0035] When the real-time engine oil temperature is greater than the maximum value of the engine oil temperature standard range, the starter motor drag time is reduced to a preset second drag time so that the engine can be started quickly. The first drag time is greater than the second drag time.

[0036] When the real-time engine oil pressure is less than a minimum value of a preset engine oil pressure standard range, the starter motor drag time is increased to a preset third drag time to allow more time for pressure to build up.

[0037] When the real-time engine oil pressure is greater than the maximum value of the engine oil pressure standard range, the starter motor drag time is reduced to a preset fourth drag time to prevent overload, wherein the third drag time is greater than the fourth drag time.

[0038] After completing the starter motor drag time adjustment method, the real-time oil pressure and real-time oil temperature are remeasured. When the remeasured real-time oil pressure is still lower than the starter oil pressure limit value, the low oil pressure alarm and the start failure alarm are activated.

[0039] If the engine does not start smoothly or has abnormal noise, the starter motor drag time needs to be further adjusted according to the real-time oil temperature and real-time oil pressure.

[0040] The present invention can improve engine starting efficiency: Oil temperature and pressure are key factors in engine starting. By adjusting the starter motor drag time according to these parameters, the engine can be ensured to start in the optimal state, thereby improving starting efficiency.

[0041] This invention can reduce engine wear: When the engine oil temperature is low, the oil viscosity is high and the flowability is poor, which may lead to increased wear during engine startup. By extending the starter motor drag time, the oil has more time to flow to the bearings and gears, reducing wear during startup.

[0042] The present invention can extend the life of the engine: an appropriate starter motor drag time can reduce the mechanical stress when the engine is started, thereby reducing the wear of engine components and extending the overall life of the engine.

[0043] The present invention can optimize energy use: by accurately controlling the drag time of the starter motor, unnecessary energy consumption can be reduced and fuel efficiency can be improved.

[0044] The present invention can improve the performance of the starter motor: when the oil pressure is insufficient, the starter motor may need longer time to overcome the inertia of the engine. Properly setting the drag time can ensure that the starter motor operates in an optimal state, improving its performance and reliability.

[0045] The present invention can enhance the safety of the starting system: insufficient oil pressure may cause difficulty in starting the engine, or even prevent it from starting. By monitoring the oil pressure and adjusting the drag time, additional starting assistance can be provided when the pressure is insufficient, thus enhancing the safety of the starting system.

[0046] The present invention can improve diagnostic and troubleshooting capabilities: by monitoring oil temperature and pressure, engine system problems can be detected and diagnosed in a timely manner. This helps to detect faults early and avoid potential serious damage.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An engine oil pressure linked starting control strategy, characterized in that: The strategy includes obtaining real-time oil pressure and real-time oil temperature, and performing pre-oil supply based on the real-time oil pressure and oil temperature; judging whether the starting oil pressure requirement is met based on the real-time oil pressure and real-time oil temperature, and when the starting oil pressure requirement is met, the engine is started successfully; when the starting oil pressure requirement is not met, the starter motor drag time adjustment method is triggered.

2. The engine oil pressure linked starting control strategy according to claim 1, characterized in that: The starting oil pressure requirement is to set a starting oil pressure limit value, and the real-time engine oil pressure is greater than or equal to the starting oil pressure limit value.

3. The engine oil pressure linked starting control strategy according to claim 2, characterized in that: The method for setting the starter oil pressure limit value is: When the real-time engine oil temperature is greater than the preset engine oil pressure limit value oil temperature gear larger value, the starter oil pressure limit value is the preset starter oil pressure limit calibration smaller value; When the real-time engine oil temperature is lower than the preset engine oil pressure limit value, the starter oil pressure limit value is equal to the preset starter oil pressure limit calibration value; When the real-time oil temperature is greater than the oil pressure limit value oil temperature gear smaller value and less than the oil pressure limit value oil temperature larger value, the starter oil pressure limit value is the preset starter oil pressure limit calibration middle value.

4. The engine oil pressure linked starting control strategy according to claim 2, characterized in that: When the real-time engine oil pressure is less than the starter oil pressure limit value, the preset engine oil pressure limit starter oil injection flag is set to position 1, so that the engine is started without oil injection.

5. The engine oil pressure linked starting control strategy according to claim 1, characterized in that: The method for adjusting the starter motor drag time is as follows: When the real-time engine oil temperature is less than a minimum value of a preset engine oil temperature standard range, increasing the starter motor drag time to a preset first drag time so that the engine can be started at a slower speed; When the real-time engine oil temperature is greater than a maximum value of a standard engine oil temperature range, reducing the starter motor drag time to a preset second drag time so that the engine can be started quickly; When the real-time engine oil pressure is less than a minimum value of a preset engine oil pressure standard range, increasing the starter motor drag time to a preset third drag time to allow more time for pressure to build up; When the real-time engine oil pressure is greater than a maximum value of a standard range of engine oil pressure, the starter motor drag time is reduced to a preset fourth drag time to prevent overload.

6. The engine oil pressure linked starting control strategy according to claim 5, characterized in that: After completing the starter motor drag time adjustment method, the real-time oil pressure and real-time oil temperature are remeasured. When the remeasured real-time oil pressure is still less than the starter oil pressure limit value, a low oil pressure alarm and a start failure alarm are activated.

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