Electric vacuum servo device control strategy of electric car brake

A technology of vacuum boosting and device control, applied in the direction of brake transmission, brakes, vehicle components, etc., can solve the problems of no diagnostic function, hidden safety hazards, high energy consumption, etc.

Inactive Publication Date: 2010-08-04
CHINA AUTOMOTIVE TECH & RES CENT +1
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AI Technical Summary

Problems solved by technology

The vast majority of cars use a vacuum booster braking system. The vacuum source of the vacuum booster device in the traditional internal combustion engine vehicle braking system comes from the engine intake manifold, while pure electric vehicles or electric vehicles with pure electric working conditions have no engine The vacuum power source of the air manifold, the braking force generated by manpower alone cannot meet the needs of vehicle braking, so it is necessary to have an electric vacuum booster to assist manpower in vehicle braking
[000

Method used

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  • Electric vacuum servo device control strategy of electric car brake
  • Electric vacuum servo device control strategy of electric car brake
  • Electric vacuum servo device control strategy of electric car brake

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Embodiment Construction

[0010] Below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention will be further described:

[0011] Such as figure 1 The shown electric vacuum booster device for electric vehicle braking includes an electric vacuum pump 1, a vacuum tank 3 connected to the vacuum pump 1 through a pipeline with a check valve 2 on it, and a vacuum pressure switch is installed on the vacuum tank 3 4. The vacuum booster 5 is connected to the vacuum tank 3 through a connecting pipeline, the pedal push rod of the brake pedal 9 is connected to the push rod of the vacuum booster 5 and the piston rod of the vacuum booster 5 is connected to the braking system 6 . The brake pedal 9 is connected to a brake switch or a pedal opening sensor 8 . When the electric vacuum pump 1 is working, the air in the vacuum tank 3 is drawn out through the one-way valve 2 to form a certain vacuum. The vacuum pressure switch 3 detects the vacuum degree in the vacuum t...

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Abstract

The invention discloses an electric vacuum servo device control strategy of an electric car brake. The control strategy comprises the following steps: a vacuum pump control unit is used to control the on/off of a vacuum pump according to the collected signal of a vacuum pressure switch arranged on a vacuum tank and the output signal of a brake switch connected with a brake pedal or a pedal opening sensor, and the vacuum pump control unit is used to perform systematic failure diagnosis according to the output signal of the brake switch or the pedal opening sensor, the signal of the vacuum pressure switch and the operation time of the vacuum pump. By adopting the method of the invention, the problems of large energy consumption of the vacuum pump and poor system reliability can be solved.

Description

technical field [0001] The invention relates to a control strategy for an electric vehicle brake electric vacuum booster, in particular to a control strategy for an electric vehicle brake electric vacuum booster with a vacuum pressure switch. Background technique [0002] Driven by national policies, financial support and technology, electric vehicles (especially pure electric vehicles) have developed rapidly. The vast majority of cars use a vacuum booster braking system. The vacuum source of the vacuum booster device in the traditional internal combustion engine vehicle braking system comes from the engine intake manifold, while pure electric vehicles or electric vehicles with pure electric working conditions have no engine For the vacuum power source of the air manifold, the braking force generated by manpower alone cannot meet the needs of vehicle braking. Therefore, it is necessary to have an electric vacuum booster to assist manpower in vehicle braking. [0003] At pre...

Claims

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Application Information

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IPC IPC(8): B60T13/52
Inventor 周能辉赵春明李磊吴志新温泉张广秀辛明华杜志彬
Owner CHINA AUTOMOTIVE TECH & RES CENT
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