Brake power-assisted system based on ECU (electric control unit) auxiliary control and control method of brake power-assisted system

A technology of auxiliary control and power assist system, applied in engine control, brakes, vehicle components, etc., can solve the problems of high idle manifold pressure, hard braking, low vacuum, etc., to achieve the effect of simple system and increased cost

Inactive Publication Date: 2015-02-04
CHERY AUTOMOBILE CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] In summary, there are the following technical problems in the prior art: when braking, the idle manifold pressure is too large (low vacuum), and the brakes are hard.

Method used

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  • Brake power-assisted system based on ECU (electric control unit) auxiliary control and control method of brake power-assisted system
  • Brake power-assisted system based on ECU (electric control unit) auxiliary control and control method of brake power-assisted system
  • Brake power-assisted system based on ECU (electric control unit) auxiliary control and control method of brake power-assisted system

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Embodiment Construction

[0029] The present invention will be described in detail below according to the accompanying drawings, which is a preferred embodiment among various implementations of the present invention.

[0030] In a preferred embodiment, the ECU is used as the auxiliary controller of the brake booster system to identify the braking action, and realize the vacuum degree of the manifold to meet the braking requirement through the control strategy algorithm. It does not affect the requirement of low idle speed for fuel consumption, but also ensures a certain degree of vacuum in the manifold to meet the requirements of braking.

[0031] 1. Algorithm of enabling condition of brake assist assist control:

[0032] When the brake switch is set, the clutch switch is set, and the vehicle speed is greater than a certain value, the brake assist assist control is enabled. When the vehicle speed is 0, it means that the vehicle has stopped and the brake is completed. It is necessary to jump out of the...

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Abstract

The invention relates to a brake power-assisted system based on ECU (electric control unit) auxiliary control and a control method of the brake power-assisted system. The brake power-assisted system comprises a brake power-assisted vacuum pump, an engine intake manifold and an ECU, wherein the brake power-assisted vacuum pump is connected with the engine intake manifold through a pipeline, the engine intake manifold is connected with the engine and is used for forming vacuum degree for the brake power-assisted vacuum pump, the engine intake manifold is provided with an intake manifold pressure sensor, the intake manifold pressure sensor is connected and communicated with the ECU, and is used for sending signals to the ECU, and the ECU is used for controlling the engine to control the vacuum degree of the engine intake manifold which is connected with the engine. The ECU is used as the auxiliary controller of the brake power-assisted system, so as to identify the brake action, and a control strategy algorithm is adopted to enable the vacuum degree of the manifold to meet the brake requirement. The influence on the requirement of oil consumption on low idle rotation speed is avoided, and the manifold is guaranteed to have certain vacuum degree to meet the brake requirement. The control method and the control method are innovatively developed. The brake power-assisted system has the advantages that the brake auxiliary control is realized by the ECU, the system is simple, the purpose is realized, and the cost is not increased.

Description

technical field [0001] The invention relates to the field of automotive electronic control, in particular to a brake booster system based on ECU auxiliary control and a control method thereof. Background technique [0002] As the requirement of automobile fuel consumption becomes lower and lower, the idling speed of automobile engine is also lower and lower. However, the low idle speed will easily lead to a decrease in the vacuum of the intake manifold, which will affect the brake assist. The brake booster is related to the brake booster system, but because the vacuum of the brake booster system comes from the manifold pressure, the vacuum in the manifold plays an important role in the brake booster. In the current actual technology, the idle speed control of the engine management system controller ECU does not consider the auxiliary control of the brake booster system. [0003] In summary, there are the following technical problems in the prior art: when braking, the pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T13/52B60T13/72F02D29/02
CPCB60T13/52B60T13/72F02D29/02F02D2200/101
Inventor 祁克光周阳项南军
Owner CHERY AUTOMOBILE CO LTD
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