Vehicle braking function adjusting method and system
A technology of vehicle braking and adjustment methods, which is applied in the direction of brakes, vehicle components, brake transmissions, etc., can solve the problems of sensitive triggering of HBA functions, large differences, and inability to guarantee the coverage of functions, so as to ensure perfect triggering and enhance application sexual effect
Active Publication Date: 2020-08-25
DONGFENG MOTOR CORP HUBEI
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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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[0040] The embodiment of the present invention provides a vehicle braking function adjustment method, which monitors and collects the maximum master cylinder pressure and the maximum master cylinder pressure change rate when the driver brakes each time by means of learning, so as to calculate and obtain the HBA threshold correction Value, used to correct the original HBA threshold value, which is equivalent to collecting the driving habits of each driver, so as to calculate the HBA threshold value in line with the current driver, and enhance the applicability of the HBA function. Correspondingly, the embodiment of the present invention also provides a vehicle braking function adjustment system. The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0041] see figure 1 As shown, a vehicle braking function adjustment method provided by an embodiment of the present invention includes the following steps: ...
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The invention discloses a vehicle braking function adjusting method and system, and relates to the technical field of vehicle control. The method comprises the steps: monitoring and recording maximummain cylinder pressure and a maximum main cylinder pressure change rate of a vehicle when a driver brakes each time; inputting the maximum main cylinder pressure and the maximum main cylinder pressurechange rate recorded each time into a set map parameter to obtain a characteristic value; when the obtained characteristic values reach a preset number, calculating all the characteristic values based on preset operation logic to obtain an HBA threshold correction value; and calculating the HBA threshold correction value and a preset HBA threshold value based on set arithmetic logic to obtain a corrected HBA threshold value. According to the method, the HBA threshold value conforming to a current driving habit of a driver can be obtained through calculation, and perfect triggering of a vehicle HBA function is guaranteed.
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...
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IPC IPC(8): B60T8/172B60T13/66
CPCB60T8/172B60T13/662
Inventor 罗宜鸣陈晓峰
Owner DONGFENG MOTOR CORP HUBEI