Steering Failure Brake System Reaction Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle stabilization systems fail to effectively counteract steering failures and maintain lateral control when one or more wheel brakes fail, leading to instability and loss of control.
Innovation Solution
A system comprising sensors and a processor that monitor vehicle parameters, compare them to predetermined thresholds, and transmit control signals to increase braking force at unaffected wheel ends to stabilize the vehicle, potentially locking wheel ends to counteract instability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional systems brake all wheels equally to compensate for a failed brake, then overall braking force is achieved, but lateral control and vehicle stability deteriorate
Solution Approach 1:
The system applies different braking strategies to different wheel ends based on their operational status. When a brake fails, the system applies full braking force to the affected wheel end to lock it and prevent lateral movement, while applying reduced or no braking to unaffected wheel ends to maintain their steering capability and lateral control. This localized differentiation resolves the contradiction by preserving lateral control while still achieving sufficient braking force.
Solution Approach 2:
Instead of applying braking force to compensate for a failed brake (conventional approach), the system inverts the approach by applying full braking to the failed wheel end to lock it, and reducing braking on unaffected wheels to maintain their lateral control. This inversion of the conventional compensation strategy resolves the lateral control issue while maintaining stability.
2Force
If additional pressure is applied at non-failed brakes to compensate for brake failure, then braking force is maintained, but vehicle stability and lateral control worsen
Solution Approach 1:
The system differentiates the braking response based on the specific wheel end status. For failed wheel ends, full braking is applied to lock them and prevent instability. For non-failed wheel ends, braking is reduced or eliminated to maintain their ability to provide lateral control and steering response. This localized quality differentiation maintains reliability by preserving the functional integrity of non-failed brakes for stability purposes.
3Speed
If all wheel brakes are used to achieve braking force, then stopping capability is improved, but lateral control and steering response deteriorate
Solution Approach 1:
The system applies full braking force selectively only to the failed wheel end to lock it and achieve stopping capability, while maintaining reduced or zero braking on unaffected wheel ends to preserve their steering response and lateral control capabilities. This localized application resolves the contradiction by achieving stopping capability through the failed wheel while preserving ease of operation through the functional wheels.
Data Source
AI summary
When a vehicle experiences an instability event, an instability event trigger (e.g., a failed modulator, unexpected yaw or lateral acceleration, unexpected steering wheel position change, etc.) is monitored and the magnitude thereof is compared to a corresponding predetermined threshold above which corrective action is initiated. Depending on the magnitude and type of instability trigger, one or more wheel ends are identified as candidates for brake activation. Braking force at the identified wheel ends is gradually increased until the vehicle becomes stable or comes to a stop.