Vehicle braking control method and system

Abstract

The invention provides a vehicle braking control method and system, and the method comprises the steps: S1, obtaining the working condition parameter information of a vehicle, and judging whether the vehicle starts a single-pedal driving mode or not according to the working condition parameter information; if yes, executing the step S2; if not, continuing to judge; s2, the required torque of the vehicle is obtained according to the working condition parameter information; s3, judging whether the vehicle decelerates or not according to the required torque; wherein if the required torque is smaller than 0Nm, it is judged that the vehicle is decelerated; if it is judged that the vehicle slows down, the step S4 is executed; and S4, battery parameters of the vehicle are obtained, distribution coefficients of motor braking and hydraulic braking of the vehicle participating in braking are calculated according to the battery parameters, and motor braking and hydraulic braking are controlled according to the distribution coefficients. Therefore, the total braking torque in the speed reduction process can be equal to the required torque, the whole vehicle can have the consistent driving feeling in the whole operation stage, the good speed reduction experience feeling of a user is guaranteed, and the driving safety is improved.

Description

technical field [0001] The invention belongs to the technical field of vehicle braking control, and in particular relates to a control method and system for vehicle braking. Background technique [0002] Overcharging the battery pack or being fully charged for a long time will affect the life of the battery pack. The current mainstream energy recovery system control logic is: when the remaining power of the battery pack is close to a preset value (such as 95%) of full charge , there is no energy recovery function by default. Prevent the battery pack from recovering energy from vehicle braking or coasting at this stage, causing the battery to be overcharged and the battery to be fully charged for a long time. [0003] Patent CN202110291772.5 "Driving Control Method and Device for Electric Vehicle and Electric Vehicle" provides a single-pedal mode control method, which relies on the motor to control the vehicle deceleration when the single-pedal control driving mode reduces t...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that in the process of decelerating an electric vehicle in a fully charged state in the prior art, the energy recovery function is not turned on, and the deceleration of the vehicle can only be slowed down slowly by the resistance of the whole vehicle itself after the pedal is released. There is a problem of poor deceleration effect and poor driving experience; moreover, if the traffic is jammed, the slow deceleration effect is also prone to traffic accidents

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