Electronic caliper clamping and releasing control method and device and automobile

Abstract

The invention provides an electronic caliper clamping and releasing control method which comprises the steps that when it is determined that a whole vehicle is in a preset downhill working condition, if an electronic caliper driving-away releasing function is triggered, a driver is prompted to step on a brake pedal through an instrument; judging whether the driver steps on an accelerator pedal; if the driver steps on the accelerator pedal and the opening degree of the accelerator pedal is smaller than or equal to the preset opening degree, the electronic calipers are controlled to release the clamping force in a stepped mode, and then the acceleration of the vehicle is increased according to the first rising speed; meanwhile, a driver is prompted to brake through an instrument; if the driver steps on the accelerator pedal and the opening degree of the accelerator pedal is larger than the preset opening degree, the electronic calipers are controlled to release the clamping force in a linear mode, and the acceleration of the vehicle is increased according to the second rising speed; meanwhile, a driver is prompted to brake through an instrument; the second rise rate is greater than the first rise rate.

Description

technical field [0001] The invention relates to the technical field of electric vehicle parking and power system control logic design, in particular to an electronic caliper clamp release control method, device and automobile. Background technique [0002] At present, electric vehicles on the market have added an automatic parking function (AVH) and a drive away release function (DAA) for the convenience of the driver. After the driver stops the vehicle on a slope or flat ground, release the brake pedal, and the ESC keeps the pressure. The vehicle will park for a long time. When the parking time exceeds a certain period of time (usually 3 minutes), the EPB controller will control the electronic calipers. Parking, when the driver steps on the accelerator pedal, the EPB controller will trigger the departure release function (DAA); when the departure release function (DAA) is triggered on a steep slope, see the force diagram figure 1 , the EPB will release the caliper directly...

AI Technical Summary

Problems solved by technology

After the driver stops the vehicle on a slope or flat ground, release the brake pedal, and the ESC keeps the pressure. The vehicle will park for a long time. When the parking time exceeds a certain period of time (usually 3 minutes), the EPB controller will control the electronic calipers. Parking, when the driver steps on the accelerator pedal, the EPB controller will trigger the departure release function (DAA); when the departure release function (DAA) is triggered on a steep slope, see the force diagram figure 1 , the EPB will release the caliper directly, and the vehicle will rush forward due to the joint action of gravity component Fi and motor driving force Fd

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