Brake vacuum booster device for electric automobile and control method thereof

A technology of vacuum boosting and electric vehicles, which is applied in the direction of brake transmissions, brakes, vehicle components, etc., can solve the problems of low reliability of brake vacuum boosting devices, achieve high safety, prevent control errors or delays, and increase safety sexual effect

Active Publication Date: 2009-02-04
BYD CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of low reliability of the brake vacuum booster in th...

Method used

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  • Brake vacuum booster device for electric automobile and control method thereof
  • Brake vacuum booster device for electric automobile and control method thereof
  • Brake vacuum booster device for electric automobile and control method thereof

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Embodiment Construction

[0013] The present invention provides a brake vacuum booster that can be used for electric vehicles, including: a vacuum booster, a vacuum pump, an air storage tank, a main control ECU, a pressure sensor, and a vacuum booster, which are connected with the brake pedal and used to provide boost for the brakes ; The vacuum pump communicates with the vacuum servo air chamber of the vacuum booster through the air storage tank, and is used to extract gas from the vacuum servo air chamber; wherein, the pressure sensors are multiple, and are independently used to measure the pressure of the air storage tank The air pressure inside; the main control ECU is electrically connected with multiple pressure sensors and vacuum pumps respectively, and is used to receive the air pressure in the air storage tank measured by multiple pressure sensors, and judge whether at least one of the multiple pressure sensors is working normally, and according to the judgment As a result, it is determined whe...

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Abstract

The invention provides a brake vacuum boosting device used for an electric automobile and a control method thereof. The device comprises a vacuum booster, a vacuum pump, a gas holder, a main control ECU and a plurality of pressure sensors, wherein, the vacuum booster is used for providing assistance for brake; the vacuum pump is used for extracting and removing gases from a vacuum servo gas chamber; the pressure sensors are used for measuring gas pressure in the gas holder, wherein, a plurality of pressure sensors are respectively independently used for measuring the gas pressure in the gas holder; the main control ECU is used for receiving the gas pressure in the gas holder measured by a plurality of pressure sensors, judging whether at least one of the pressure sensors works normally and determining whether the starting of the vacuum pump is controlled according to the gas pressure in the gas holder measured by the pressure sensors and determining which pressure sensors are subject to. The device and the method of the invention can cause the brake vacuum boosting device to have relatively high reliability, thereby enhancing driving safety.

Description

technical field [0001] The present invention relates to a brake vacuum booster and its control method, more specifically, to a brake vacuum booster and its control method applicable to electric vehicles. Background technique [0002] In the vacuum booster used in traditional fuel vehicles, the power source of the brake booster, that is, the vacuum booster, is connected to the engine intake pipe through a vacuum pipeline, and the operation method is relatively sensitive. However, the structure of the current electric vehicle braking system is relatively complicated. Although it can achieve the purpose of braking, its maneuverability is not as flexible as that of traditional fuel vehicles, so the braking effect is far inferior to that of traditional fuel vehicles, which makes the safety and maneuverability of electric vehicles lower. Affected, there are security risks in many aspects. [0003] CN2880613 discloses a brake vacuum booster that can be used for electric vehicles, ...

Claims

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Application Information

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IPC IPC(8): B60T13/72B60T13/52
Inventor 祖波丁会利周波徐循进
Owner BYD CO LTD
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