Method for controlling electric automobile vacuum pump under plateau environment

Abstract

The invention discloses a method for controlling an electric automobile vacuum pump under a plateau environment. The process of the method for controlling the electric automobile vacuum pump under theplateau environment comprises the steps of detecting the pressure of the vacuum pump in an ignition state in real time; according to the pressure of the vacuum pump, judging whether the vacuum pump is started or not; and after the vacuum pump is started and works for a certain time, judging that the vacuum pump stops working or the vacuum pump enters a fault working mode during executing steppingbraking according to the pressure of the vacuum pump. According to the process of the method for controlling the electric automobile vacuum pump under the plateau environment, by combining barometricpressure under the plateau environment and a parameter of a vacuum pump system, a reasonable starting threshold and a reasonable closing threshold in the plateau environment are calibrated to finallyrealize a scheme without a barometric pressure sensor; optimal control of the vacuum pump under the plateau environment is satisfied; damages and customer complaints of the vacuum pump due to long-time working are reduced; situations such as accidents are avoided; and the input cost of the barometric pressure sensor is saved.

Description

technical field [0001] The invention belongs to the technical field of automobile control, and in particular relates to a method for controlling a vacuum pump of an electric automobile in a plateau environment. Background technique [0002] In the new energy vehicle industry, most vehicles need to use a vacuum pump to evacuate to achieve brake boosting. At present, the most common control method for vacuuming the vacuum pump is to control the opening and closing of the vacuum tank in combination with the pressure point of the vacuum tank. Troubleshoot abnormal work conditions; some use atmospheric pressure sensors to monitor and control the opening and closing of vacuum pumps. [0003] Disadvantages of the control method without an atmospheric pressure sensor: In a normal atmospheric pressure environment, the control is more reasonable, but it does not take into account the working conditions in a plateau environment. Work leads to burnout, or insufficient power, resulting ...

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Problems solved by technology

[0003] Disadvantages of the control method without an atmospheric pressure sensor: In a normal atmospheric pressure environment, the control is more reasonable, but it does not take into account the working conditions in a plateau environment. Work leads to burnout, or insufficient power, resulting in ineffective braking, which will cause customer complaints or even accidents

[0004] Disadvantages of the control method with atmospheric pressure sensor: increase the cost of the whole vehicle, and increase the failure points of the whole vehicle

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