Method and system for adjusting vehicle braking function

Abstract

The invention discloses a vehicle braking function adjustment method and system, and relates to the technical field of vehicle control. The method includes monitoring and recording the maximum master cylinder pressure and the maximum master cylinder pressure change rate of the vehicle when the driver brakes every time; The maximum master cylinder pressure and the maximum master cylinder pressure change rate recorded for the second time are input into the set map parameters to obtain the characteristic values; when the obtained characteristic values ​​reach the preset number, all the characteristic values ​​are calculated based on the preset operation logic to obtain The HBA threshold correction value; based on the set operation logic, the HBA threshold correction value and the preset HBA threshold value are calculated to obtain the corrected HBA threshold value. The invention can calculate and obtain the HBA threshold value conforming to the driving habit of the current driver, thereby ensuring the perfect triggering of the automobile HBA function.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a vehicle braking function adjustment method and system. Background technique [0002] The HBA (Hydraulic Brake Assist) function belongs to the sub-module function of the ESC (Electric Stability Controller, Electronic Stability Controller) system. The HBA function is used to quickly but not fully depress the brake pedal in an emergency situation. And when the brake pressure is not enough for full braking at this time, the brake pressure is compensated by active boosting of the ESC to trigger the ABS (Anti-lock braking system, anti-lock braking system) condition, thereby shortening the braking distance. [0003] Existing HBA control usually uses the rate at which the driver steps on the brake pedal or the rate at which the master cylinder pressure changes as a threshold value to control the triggering of the HBA. However, in the actual implementation process, if the thres...

AI Technical Summary

Problems solved by technology

However, in the actual implementation process, if the threshold value is set too high, it may cause that the HBA function trigger rate cannot be guaranteed in an emergency, and the good expectation of the HBA function cannot be achieved; if the threshold value is set too low, it may cause the HBA function to fail. Sensitive triggering of the function, or even false triggering, resulting in the safety risk of rear-end collision caused by the failure of the rear car to brake in time

As a safety guarantee function that plays a key role in emergency braking, due to the diversity of driver groups and differences in braking habits (the braking habits developed by most drivers are early, light, slow, braking habits affect the response at critical moments), the gap in own strength (especially the huge difference between female drivers and young and middle-aged male drivers), and the difference in operation during intense driving. For the HBA function, a single fixed threshold value setting Unable to have good universality, and cannot guarantee good functional coverage

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