Brake pedal diagnosing method for hybrid electric vehicle

A hybrid electric vehicle and brake pedal technology, applied in the field of hybrid electric vehicles, can solve the problems of time deviation, asynchronous brake signal and brake light signal, etc., and achieve the effect of protecting operation safety.

Inactive Publication Date: 2013-01-30
BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a brake pedal diagnosis method of a hybrid electric vehicle to solve the situation that the brake signal and the brake light signal are not synchronized and time deviation occurs when the brake pedal is used for a long time, and the fault needs to be detected technical issues

Method used

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  • Brake pedal diagnosing method for hybrid electric vehicle

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Embodiment Construction

[0013] The basic structure of a hybrid electric vehicle is well known to those skilled in the art, and will not be repeated here. The brake pedal diagnosis method of the hybrid electric vehicle is mainly controlled by the HCU on the hybrid electric vehicle.

[0014] Such as figure 1 As shown, the method for diagnosing the brake pedal in this embodiment is divided into two different stages, through which the diagnosis of the brake pedal can be completed. The brake pedal needs two signals, the brake signal and the brake light signal, and both signals are switch values.

[0015] After the vehicle control system is powered on and until the system is powered off, the diagnosis of the brake pedal is always performed. In the initial state, the operator does not step on the brake pedal, and the brake pedal is in the idle state; when the brake pedal is stepped on, the two-way The brake pedal signal is output to the hybrid vehicle control system, and the hybrid vehicle control system ...

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Abstract

The invention relates to a brake pedal diagnosing method for hybrid electric vehicle. When a brake light signal and a brake signals exceed time T1 asynchronously, the number is increased by 1 on a counter C1, and when the C1 is accumulated to exceed Z1, the error if unreasonable signal can be reported, and the fault can be diagnosed. The brake pedal diagnosing method has the beneficial effects that according to the asynchronous deviation data of the brake light signal and the brake signal, a brake pedal is detected, meanwhile, after the fault of the brake pedal is diagnosed, the vehicle is in a limping homing mode, so that the safety rung of the vehicle is effectively protected.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a method for diagnosing a brake pedal of a hybrid electric vehicle. Background technique [0002] With the increasing emphasis on energy security and environmental protection in the world, countries have become more and more strict on vehicle emissions. Reducing dependence on energy and achieving energy conservation and emission reduction has become an urgent problem to be solved for the sustainable development of the world economy. . Hybrid vehicles and pure electric vehicles have become the development trend of today's automobile industry. Gasoline-electric hybrid vehicles combine the motor and the engine to achieve reasonable energy-saving and emission-reduction effects for various working conditions. Hybrid functions such as idling stop, motor starting, intelligent charging, regenerative braking, motor assist, and electric crawling, etc., have The advantage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T17/22
Inventor 崔海龙高史贵
Owner BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD
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