Oil thermal management control method and device in engine lubrication system

Abstract

The invention discloses an oil thermal management control method in an engine lubrication system. The control method comprises the steps of acquiring the oil temperature in a main oil duct of an engine; judging whether the oil temperature is lower than a first temperature threshold or not; controlling a variable displacement oil pump to work according to the high pressure mode if yes, and closingan electric control piston cooling nozzle; judging whether the oil temperature is lower than a second temperature threshold or not if not; controlling the variable displacement oil pump to work according to the high pressure mode if the oil temperature is no lower than the first temperature threshold and is lower than the second temperature threshold; and opening the electric control piston cooling nozzle. According to the oil thermal management control method, the variable displacement oil pump is combined with the electric control piston cooling nozzle effectively, and segmental control is performed according to the oil temperature; meanwhile, the high and low pressure modes of the variable displacement oil pump and the opening and closing of the electric control piston cooling nozzle are controlled; quick oil temperature rise is achieved, and the oil viscosity is reduced so that the oil consumption is reduced; and meanwhile, the situation that the piston temperature is too low and consequently the displacement is increased is avoided. The invention further discloses a device.

Description

technical field [0001] The invention relates to the technical field of engine lubricating systems, in particular to a method and device for heat management and control of engine oil in the engine lubricating system. Background technique [0002] With the widespread popularization of automobiles, people pay more and more attention to the performance of automobiles, and as an important part of automobiles, the performance of engines is also constantly improving. In the general engine lubrication system, the oil is sucked out from the oil pan by the oil pump, and distributed to various parts such as bearings, pistons, piston cooling nozzles, etc. through the main oil passage. [0003] With the increasingly stringent emission and fuel consumption regulations, technologies such as variable displacement oil pumps and electronically controlled piston cooling nozzles are more and more widely used. The variable displacement oil pump and the electronically controlled piston cooling n...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for oil thermal management control in the engine lubrication system, to solve the technical problems of increased emissions and increased fuel consumption caused by separate control of the variable displacement oil pump and the piston cooling nozzle in the existing lubrication system

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