Brake-By-Wire Structure With Triple Fallback Braking
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Solution Overview
Problem
Existing brake systems for vehicles, particularly those using brake-by-wire technology, fail to ensure continued safe operation and customer comfort when both primary and secondary brake systems experience faults.
Innovation Solution
A brake system structure comprising three redundant brake systems: a primary autonomous brake system, a secondary autonomous brake system, and a third brake system that provides a second fallback level through electromechanical drive systems, ensuring continued operation even after multiple faults.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only primary and secondary brake systems are provided, then device complexity is reduced, but reliability deteriorates because continued travel cannot be guaranteed after multiple faults
Solution Approach 1:
The brake system is divided into three independent subsystems: primary brake system, secondary brake system, and third brake system. Each subsystem can function independently, allowing the vehicle to maintain braking capability even after multiple failures. This segmentation ensures that a single point of failure does not compromise the entire braking function.
Solution Approach 2:
The patent implements redundant brake systems as a preemptive safety measure. The third brake system serves as a backup cushion that activates when primary and secondary systems fail, ensuring continued safe operation. This prior cushioning approach guarantees that safety is maintained even before actual faults occur.
2Ease of operation
If mechanically decoupled brake-by-wire system is implemented, then ease of operation is improved for disabled people and automated driving, but device complexity increases due to multiple redundant systems
Solution Approach 1:
The patent replaces direct mechanical coupling between brake pedal and braking mechanism with an electronic brake-by-wire system. This substitution allows for mechanical decoupling, making the brake system accessible to disabled individuals who cannot physically operate traditional pedals, while also enabling automated driving functions. The electronic system can be controlled through alternative interfaces suitable for various disabilities.
Data Source
AI summary
A brake system structure for a vehicle, preferably a brake-by-wire system, in which detection devices and conversion devices for a brake request are mechanically decoupled from one another. The brake system structure includes: a first brake system for providing a brake function, the first brake system being configured to be autonomous and having a first power supply; a second brake system for providing a first fallback level for the brake function, the second brake system being configured to be autonomous and having a second power supply; and a third brake system for providing a second fallback level for the brake function, in particular by regenerative deceleration. A third power supply is provided at least for the first brake system.