Brake Override Torque Control for Smooth Vehicle Braking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current brake override systems (BOS) cause a poor driving experience due to sudden power interruptions when the brake pedal is stepped on or jammed on, leading to direct clearing of engine drive torque.
Innovation Solution
A braking control method and system that acquires current acceleration and braking parameters, determines a target acceleration coefficient based on the braking mode, generates a target acceleration parameter, and controls engine drive torque accordingly to prevent sudden power interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If drive torque of the engine is directly cleared after the brake pedal is stepped on or jammed on, then the braking system achieves the fastest braking effect, but sudden power interruption causes poor driving experience
Solution Approach 1:
The patent applies dynamics by making the engine drive torque dynamically adjustable rather than statically cleared. The control system continuously adjusts the drive torque based on real-time braking parameters (brake pedal opening degree, brake master cylinder pressure) according to a preset corresponding relationship, enabling smooth transition from acceleration to braking without sudden power interruption.
Solution Approach 2:
The patent changes the parameter of engine drive torque from a binary state (on/off) to a continuously variable parameter. By establishing a corresponding relationship between braking parameters and drive torque, the system adjusts torque output proportionally to braking intensity, preventing sudden power loss while maintaining effective braking capability.
2Ease of operation
If drive torque is smoothly controlled during braking, then driving experience is improved, but braking response time increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing the corresponding relationship between braking parameters and drive torque before actual braking occurs. The control system has predetermined how drive torque should be adjusted for various braking scenarios, enabling immediate response when braking is initiated without requiring real-time calculation delays.
Solution Approach 2:
The patent implements feedback control by continuously monitoring braking parameters (brake pedal opening degree, brake master cylinder pressure) and adjusting drive torque in real-time based on the preset corresponding relationship. This closed-loop control ensures both smooth torque transition and rapid response to braking inputs.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A braking control method and system and a vehicle, the method comprising: acquiring a current acceleration parameter, a current braking parameter and a current braking mode, wherein the corresponding relation between a braking parameter and an acceleration coefficient is preset in a braking mode; according to the current braking mode, determining a target acceleration coefficient corresponding to the current braking parameter; generating a target acceleration parameter according to the target acceleration coefficient and the current acceleration parameter; and according to the target acceleration parameter, controlling drive torque outputted by an engine. The drive torque outputted by the engine is controlled according to the current braking mode and the braking parameter, which prevents the problem of sudden power interruption caused by the direct clearing of the drive torque of the engine after a brake pedal is stepped on, thereby effectively improving the driving experience.