Vehicle Brake Temperature Control via Driving Force Limitation
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Solution Overview
Problem
Existing vehicle control systems fail to effectively reduce brake fade while minimizing driver discomfort, particularly when brake temperatures exceed set thresholds.
Innovation Solution
A vehicle control system that limits driving force based on brake temperature, using threshold values and acceleration limits to prevent overheating and brake fade, while ensuring smooth vehicle operation and reducing discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the traveling speed of the vehicle is limited to reduce brake temperature, then the likelihood of brake fade is reduced, but driver discomfort increases
Solution Approach 1:
The patent changes the control parameter from traveling speed to driving force limitation. By limiting the driving force based on brake temperature thresholds rather than directly limiting speed, the system prevents brake overheating while allowing the vehicle to maintain its traveling speed, thus avoiding driver discomfort caused by speed restrictions.
Solution Approach 2:
The patent implements dynamic control by adjusting the driving force limitation based on real-time brake temperature conditions. The electronic control unit continuously monitors brake temperature and dynamically modifies the driving force output according to temperature thresholds, creating a responsive control system that adapts to changing thermal conditions without imposing fixed speed restrictions.
2Temperature
If the driving force is limited based on brake temperature, then the friction brake is less likely to be in an overheated state, but the vehicle acceleration performance is reduced
Solution Approach 1:
The system dynamically adjusts acceleration limits based on brake temperature conditions. When brake temperature is below the threshold, no acceleration limitation is applied and the vehicle can accelerate normally. When the threshold is exceeded, the system applies a temporary acceleration limit only during the cooling period, allowing normal acceleration performance when brakes are cool while preventing overheating when temperatures are high.
Solution Approach 2:
The control system uses the vehicle's own motion and natural cooling to manage brake temperature. By limiting acceleration rather than applying direct cooling measures, the system allows the vehicle's continued movement and ambient cooling to naturally reduce brake temperature, eliminating the need for additional active cooling mechanisms while maintaining safety.
Data Source
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AI summary
An aspect of the present invention relates to a vehicle control system configured to control a vehicle. The vehicle control system includes an electronic control unit (20) configured to limit a driving force to be applied to the vehicle based on a brake temperature that is a temperature of a friction brake (10) provided on a wheel of the vehicle.