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A starting control method of an electric vehicle brake vacuum pump

A technology of electric vehicles and vacuum pumps, which is applied in the direction of braking transmissions, brakes, vehicle components, etc., and can solve the problem of the driver's braking comfort and high-speed braking, emergency continuous braking safety, etc. problems, to achieve the effect of improving the performance, safety and comfort of the vehicle brake booster system

Inactive Publication Date: 2018-12-11
四川江淮汽车有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the pure electric vehicles currently on the market use the control method of starting the vacuum pump below the vacuum threshold and shutting down the vacuum pump when the vacuum reaches the peak value. Emergency Continuous Braking Safety

Method used

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  • A starting control method of an electric vehicle brake vacuum pump
  • A starting control method of an electric vehicle brake vacuum pump

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] Such as figure 1 and 2 As shown, a start-up control method for a brake vacuum pump of an electric vehicle comprises the following steps:

[0026] Step 1: The brake switch and the sensor group generate a signal change and transmit it to the vehicle controller; the sensor group includes a vacuum sensor, a speed sensor and a brake pedal position sensor; the vacuum sensor is used to monitor the vacuum degree of the vacuum tank; the speed sensor Used to monitor the vehicle speed; the brake pedal position sensor is used to monitor the position of the brake pedal;

[0027]Step 2: The vehicle con...

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Abstract

The invention discloses a starting control method of an electric vehicle brake vacuum pump, which comprises the following steps: 1. A brake switch and a sensor group generate a signal change and transmit the signal change to a vehicle controller; 2, that vehicle control controls two vacuum pump to adjust the vacuum degree of the vacuum tank according to the sensor group signal and the brake switchsignal, wherein the vacuum degree comprises a threshold value a, b and c, wherein a> b> c. The brake switch and sensor group generates real-time signals according to the real-time data changes and transmits them to the vehicle controller, After the vehicle controller acquires the brake switch signal and the sensor group signal, Vehicle speed is calculated from the signal, the control area of thevacuum pump is divided into high-speed working conditions, low speed condition and normal condition according to the vehicle speed, the vacuum degree of the vacuum tank is controlled by controlling the working state of the two vacuum pumps according to the working state type, the signal of the sensor group and the signal of the brake switch, so as to improve the performance of the brake assist system of the whole vehicle according to the control of the vacuum pump under the working state.

Description

technical field [0001] The invention belongs to the field of electric vehicle control, and in particular relates to a start-up control method of a brake vacuum pump of an electric vehicle. Background technique [0002] At present, the problem of energy crisis and air pollution appear to be becoming more and more serious. In the automotive field, pure electric vehicles and hybrid vehicles are a representative of new energy use. In order to meet the braking requirements of electric vehicles, pure electric vehicles and hybrid vehicles use electric vacuum pumps to vacuum the vacuum booster. The driver relies on the help of an electric vacuum pump for the brake boost effect. [0003] The current braking forms of pure electric light trucks are divided into two types: A, hydraulic braking; B, pneumatic braking. The vacuum boost of the hydraulic vacuum tank of pure electric light trucks mainly relies on the electronic vacuum pump to vacuum the brakes to obtain the effect of brake ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T13/563B60T13/72
CPCB60T13/563B60T13/72B60T2220/04B60T2230/00
Inventor 柏剑张作洋任佩红何艺蒋大伟吴怀述罗明勇伍藻君杨唐
Owner 四川江淮汽车有限公司
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