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

An electric vacuum pump and control method technology, applied in the direction of brakes, brake transmission devices, vehicle components, etc., can solve the problems of high cost, inability to monitor the braking effect in real time, large changes, etc., to achieve sufficient vacuum degree and avoid high costs , to ensure the effect of braking safety

Active Publication Date: 2013-05-01
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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AI Technical Summary

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

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Embodiment Construction

[0029] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] The present invention proposes a control method based on an ECU-controlled electric vacuum pump, comprising the following steps:

[0031] (1) Detect the vacuum degree of the vacuum booster in real time, and compare it with the upper and lower limits of the safety threshold.

[0032] (2) Adjust the vacuum degree of the vacuum booster according to the comparison result, including controlling the electric vacuum pump relay and the intake air volume of the engine.

[0033] The above step (2) specifically includes:

[0034] (21) When the vacuum degree is greater than the upper limit of the safety threshold, the ECU does not act.

[0035] (22) When the vacuum degree is lower than the lower limit of the safety threshold, start the electric vacuum pump.

[0036] (23) When the vacuum degree is between the upper and l...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T13/72
Inventor 任颖睦金吉刚杨安志赵福全
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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