Off-Road Braking System with Cornering Assistance
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Solution Overview
Problem
Commercial vehicles, especially those with off-road capabilities, face challenges in cornering due to poor road grip and high operating effort, with existing braking systems risking accidents if not properly locked at higher speeds, and 'cornering support' systems are unsuitable for driver-influenced braking.
Innovation Solution
A braking system with an electronic control unit connected to a cornering mode switch, allowing for cornering support by braking the inside wheels and, if front wheels are motor-driven, the outside front wheel, with activation only in off-road mode and based on speed and steering angle thresholds, and deactivation upon manual brake pressure or drive command thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cornering support systems apply braking pressure to inside wheel axles automatically, then cornering assistance is provided, but driver control over braking is lost and the system becomes unsuitable for driver-initiated braking commands
Solution Approach 1:
The system dynamically switches between automatic cornering support mode and manual braking mode based on driver input detection. The electronic control unit monitors brake pedal activation and automatically disengages cornering support when manual braking is detected, allowing the system to adapt its control strategy in real-time
Solution Approach 2:
The system uses feedback from brake pedal sensors and steering angle sensors to determine when cornering support should be activated or deactivated. The electronic control unit continuously monitors these inputs and adjusts the braking system accordingly, providing automatic assistance only when appropriate
2Reliability
If mechanical locking mechanisms are used to prevent independent brake pedal operation, then road safety is maintained, but operating effort for the driver increases
Solution Approach 1:
The system replaces mechanical locking mechanisms with an electronic control system that uses sensors and an electronic control unit to monitor and manage brake pedal operation. This electronic approach eliminates the need for complex mechanical interlocks while maintaining safety through electronic detection and response
3Ease of operation
If cornering support mode is activated at high speeds, then cornering assistance is provided, but the risk of accidents increases due to potential system failure or forgotten disengagement
Solution Approach 1:
The electronic control unit continuously monitors vehicle speed through speed sensors and automatically deactivates cornering support when speed exceeds a predetermined threshold. This feedback mechanism ensures the system remains disengaged during high-speed operation, eliminating the risk associated with accidental activation or forgotten disengagement
Solution Approach 2:
The system uses speed threshold as a critical parameter to determine cornering support activation. By setting a maximum speed threshold for activation, the system automatically adapts its behavior based on operating conditions, preventing activation when it would be unsafe
Data Source
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AI summary
The invention relates to a braking system for cornering assistance in a commercial vehicle (100, 200, 300) comprising a driving mode switch, a number of braking systems, an electronic control unit, a drive motor, and an engine control unit. According to the invention, it is proposed that the electronic control unit be connected to a cornering mode switch and configured to activate a cornering assistance mode when the electronic control unit receives a representative signal from the driving mode switch indicating that the commercial vehicle is operating in off-road mode, receives a signal from the cornering mode switch indicating that the cornering assistance mode is requested, and receives a signal from the engine control unit indicating that a drive command is being transmitted to the drive motor.