Electronic parking brake system and method for waking up the system in sleep mode

Abstract

The invention discloses an electronic parking brake system and a method for waking up the system in a sleep mode, and relates to the field of automobile electronic parking brake systems. The system comprises an EPB switch, an EPB controller and an EPB actuator; an input end of the EPB controller is connected with the EPB switch; an output of the EPB controller is connected with the EPB actuator; and the EPB controller comprises a single chip, a power chip, an ASIC chip, a sensor, an EEPROM and an H bridge. According to the method for waking up the electronic parking system in the sleep mode, awake-up function in the sleep mode is realized through an action state of a combined button in the EPB switch; the power chip periodically supplies power to the external EPB switch by utilizing a high-side switch integrated in the power chip; in an electrification process of the EPB switch, the system can be waken up when any button acts; and in the sleep mode of the system, the main chips such as the single chip and the like are completely power off to stop operation, thereby effectively reducing the quiescent current of the system and prolonging the life of a hardware system.

Description

Technical field [0001] The present invention relates to the technical field of automobile electronic control, in particular to an electronic parking brake system and a method for waking up the system in a sleep mode. Background technique [0002] Electronic Parking Brake (EPB) refers to a parking brake system controlled by an electrical actuator, which automatically parks or releases the vehicle according to the EPB switch and the vehicle status. At present, most EPB systems adopt a caliper integrated composition method. EPB drives the motor to make the caliper apply pressure to the spokes to achieve clamping and braking of the wheel. The EPB system can automatically lock the wheels when the vehicle is stopped. During parking, if the driver does not step on the brake pedal, the EPB system will not release the wheels. The EPB system will release the wheels only when the driver steps on the accelerator pedal. , Automatically unlock, thereby improving the safety of the vehicle, sim...

AI Technical Summary

Problems solved by technology

However, the power supply chip used to supply power to the single-chip microcomputer in this solution is always in working condition, because it needs to continuously provide power for the single-chip microcomputer. keep its core running

Although the single-chip microcomputer is working periodically, its life and performance will still be affected. Since the system power supply chip is always in the external power supply state, it means that it continuously converts the voltage of the car battery into the power supply voltage of the single-chip microcomputer, which will shorten its service life. have a greater impact on system security

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