Engine oil pump control method and device

Abstract

The invention provides an engine oil pump control method and device. The engine oil pump control method includes the steps that a current engine water temperature signal and an altitude signal of a vehicle are acquired; when the engine water temperature is smaller than or equal to a preset temperature threshold, or the altitude where the vehicle is located is larger than or equal to a preset height threshold, a first control signal is output to control an engine oil pump to work at maximum rotating displacement; when the engine water temperature is larger than the preset temperature thresholdand the altitude where the vehicle is located is smaller than the preset height threshold, if the rotating speed of an engine is smaller than a rotating speed set value and the engine load is smallerthan a load set value, a second control signal is output to control the engine oil pump to work at a low pressure mode; and if the rotating speed of the engine is larger than or equal to the sum of the rotating speed set value and a rotating speed buffering value or the engine load is larger than or equal to the sum of a load set value and a load buffering value, a third control signal is output to control the engine oil pump to work at a high pressure mode.

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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