Method and device for controlling an engine oil pump

Abstract

The invention provides an engine oil pump control method and device. The engine oil pump control method comprises the steps of obtaining a current engine water temperature signal of a vehicle and a height single of the altitude where the vehicle is located; when the engine water temperature is less than or equal to a preset temperature threshold value or the height of the altitude where the vehicle is located is greater than or equal to a preset height threshold value, outputting a first control signal to control an engine oil pump to work at the maximum rotation displacement; when the enginewater temperature is greater than the preset temperature threshold value and the height of the altitude where the vehicle is located is less than the preset height threshold value, if the rotating speed of an engine is less than a rotating speed set value and the load of the engine is less than a load set value, outputting a second control signal to control the engine oil pump to work in the low pressure mode; and if the rotating speed of the engine is greater than or equal to the rotating speed set value or the load of the engine is greater than or equal to the load set value, outputting a third control signal to control the engine oil pump to work in the high pressure mode. By means of the engine oil pump control method and device, engine reliability achieved in the extreme working condition can be improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an engine oil pump control method and device. Background technique [0002] At present, the electronically controlled two-stage oil pump of the engine is mainly controlled simply and roughly according to the speed and load, and it is difficult to meet the requirements of engine reliability under certain extreme working conditions. Lubrication requirements, long-term operation will have the risk of turbocharger lubrication failure; another example, in extreme low-temperature environments, the low-pressure mode of the oil pump has the problem of slow oil pressure build-up time. The column is abnormally noisy, and the distal bearing is abnormally worn. In addition, there is no buffer mode in the transition stage of high and low pressure modes, which leads to frequent switching of the oil pump under this working condition, which easily causes abnormal wear of the solenoid valve ...

AI Technical Summary

Problems solved by technology

[0002] At present, the electronically controlled two-stage oil pump of the engine is mainly controlled simply and roughly according to the speed and load, and it is difficult to meet the requirements of engine reliability under certain extreme working conditions. Lubrication requirements, long-term operation will have the risk of supercharger lubrication failure; another example, in extreme low-temperature environments, the low-pressure mode of the oil pump has the problem of slow oil pressure build-up time, and the instant cold start at low temperature will cause many engine failures. Abnormal sound of the column, abnormal wear of the distal bearing

In addition, there is no buffer mode in the transition stage of high and low pressure modes, which leads to frequent switching of the oil pump under this working condition, which easily causes abnormal wear of the solenoid valve and the oil pump

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