Method for controlling electric vacuum pump based on ECU (Electronic Control Unit) control

Abstract

The invention provides a method for controlling an electric vacuum pump control method based on ECU (Electronic Control Unit) control. The method comprises the following steps of: detecting the vacuum degree of a vacuum booster in real time, and comparing with the upper and lower limits of a safety threshold value; and adjusting the vacuum degree of the vacuum booster according to a comparison result. Measures for adjusting the vacuum degree of the vacuum booster include starting the electric vacuum pump to assist the vacuum booster in generating a vacuum degree, and lowering an engine load to increase the vacuum degree. The control method can be implemented on the basis of an engine ECU by fully depending on the structure of the conventional vehicle model, so that the defects of excessive dependence on a mechanical structure and large modification on a vehicle existing in the conventional method are overcome, the cost is saved, and a better control effect can be achieved.

Description

technical field [0001] The invention belongs to the technical field of automobile braking, and relates to a control method for adjusting vacuum degree, in particular to a control method for adjusting vacuum degree through an electric vacuum pump. Background technique [0002] With the increasingly tense energy supply, people have stronger requirements for the economy of automobiles. The engine supercharging technology that has arisen from this has effectively improved the combustion efficiency of internal combustion engines, saved fuel, and improved driving pleasure. However, the negative effect of supercharging is that the pressure of the engine intake manifold rises, and the vacuum degree of the vacuum booster decreases, so that the vacuum booster cannot meet the vacuum boosting demand of the braking system, resulting in a decrease in the boosting effect after continuous braking. The effect becomes worse and affects safety. [0003] In view of the above problems, there ar...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings of the existing technology that relies on the transformation of the mechanical structure and cannot monitor the braking effect in real time and the shortcomings of using the electronic vacuum pump method to modify the existing vehicle structure. Electric vacuum pump control method capable of real-time monitoring and improving braking effect

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