Electric automobile brake pedal signal analytic method

Abstract

The invention relates to the technical field of automobile braking and aims to provide an electric automobile brake pedal signal analytic method. The analytic method comprises the steps that when a signal output by a brake switch is invalid, a complete vehicle control unit judges that an automobile is in a non-braking state, meanwhile, a voltage value output by an analog quantity sensor is detected to be in a zero potential value range, the complete vehicle control unit judges that the automobile is in a zero potential state, and a received voltage signal is calibrated as a zero potential value; when the signal output by the brake switch is valid, the complete vehicle control unit judges that the automobile is in a braking state, and distributes electric braking torque values to an energy recovery system according to the voltage value output by the analog quantity sensor; and when the signal output by the brake switch is invalid, the voltage value output by the analog quantity sensor is not in the zero potential value range, the complete vehicle control unit judges that a braking system is in a failure state, and the complete vehicle is controlled to start a parking mode. By adopting the method, the energy recovery efficiency is improved, and accurate determining of output failures is achieved.

Description

technical field [0001] The invention relates to the technical field of automobile braking, in particular to a method for analyzing brake pedal signals of an electric automobile. Background technique [0002] For the hydraulic braking system, since the production consistency of the pure electric vehicle braking system is difficult to guarantee, it is difficult to maintain the same brake pedal stroke of each vehicle, so the initial zero-angle output voltage of the brake pedal of each electric vehicle is inconsistent, and at the same time With the operation of the vehicle, the brake pedal stroke of the same vehicle will also change, so the vehicle control program must leave enough brake pedal zero potential interval to maintain the consistency of the vehicle control program. Since enough zero potential intervals must be left in the vehicle controller program to eliminate the inconsistency of the brake pedal position output angle caused by production consistency and subsequent o...

AI Technical Summary

Problems solved by technology

[0002] For the hydraulic braking system, since the production consistency of the pure electric vehicle braking system is difficult to guarantee, it is difficult to maintain the same brake pedal stroke of each vehicle, so the initial zero-angle output voltage of the brake pedal of each electric vehicle is inconsistent, and at the same time With the operation of the vehicle, the brake pedal stroke of the same vehicle will also change, so the vehicle control program must leave enough brake pedal zero potential intervals to maintain the consistency of the vehicle control program

Since enough zero potential intervals must be left in the vehicle controller program to eliminate the inconsistency of the brake pedal position output angle caused by production consistency and subsequent operations, there must be inconsistencies in the start points of electric braking energy recovery for some vehicles. Affects the Energy Recovery Efficiency value

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