Control method of engine electronic water pump

Abstract

The invention discloses a control method of an engine electronic water pump. The control method includes the steps that an actual water temperature of an engine, a load of the engine and rotating speed data are collected; according to the actual water temperature of a water outlet of the engine, operation working conditions of the engine include a warming stage, a heating stage and a water temperature protecting stage; whether a working state of the engine is at any stage of the above stages or not is sequentially judged; when the working state of the engine is at the warming stage, the electronic water pump reduces the supplying of cooling liquid, and the engine rapidly warms up; when the working state of the engine is at the heating stage, the electronic water pump supplies cooling liquid at the lowest demand, and energy consumption of the electronic water pump is reduced; and when the working state of the engine is at the water temperature protecting stage, the electronic water pumpsupplies cooling liquid at full power. The operation working conditions of the engine are divided into multiple stages, a cooling system performs supplying according to demands at each stage, the lowest power loss and fuel oil consumption are realized, and the requirements for rapid heating and rapid cooling are met.

Description

technical field [0001] The invention relates to the technical field of engine cooling control, in particular to a method for controlling an engine electronic water pump. Background technique [0002] The internal combustion engine is the core power component of the vehicle. With the development of technology, the electrical control components gradually replace the traditional mechanical control components. The electronic water pump components used in the internal combustion engine cooling system realize the on-demand supply of the cooling system through electronic and electrical control. Traditional mechanical pumps It is decoupled from the fixed transmission ratio relationship of the internal combustion engine speed, and the flow can be actively adjusted in all working conditions of the internal combustion engine, so as to improve the combustion efficiency of the internal combustion engine and reduce the loss of friction work; at the same time, the electronic water pump is p...

AI Technical Summary

Problems solved by technology

However, the engine heat evaluation needs to be calibrated on the engine bench. The bench calibration data is different from the actual operation data of the whole vehicle. Multiple variables such as vehicle speed, ambient temperature, exhaust back pressure, engine room temperature, and radiator capacity affect the heat dissipation of the engine. The speed of the electronic water pump calculated by the formula is not accurate enough; with the change of the vehicle cooling system, there is a potential overheating due to heat generation and heat dissipation.

At the same time, this solution will cause the electronic water pump and the thermostat to adjust the engine target at the same time, resulting in a periodic increase in the actual water temperature of the engine to reach a balance, and the combustion economy point cannot be reached in a short time; higher cost

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