Post-Collision Brake Pre-Charging for Secondary Impact Mitigation
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Solution Overview
Problem
After an initial collision, modern safety systems in motor vehicles often fail to function effectively, leaving drivers unable to apply the brakes properly due to panic, distraction, or other factors, leading to a need for improved safety measures to prevent or mitigate secondary collisions.
Innovation Solution
A method and device for providing braking assistance in a motor vehicle that detects an initial collision and the driver's intent to brake, using a controller with a braking assistance algorithm to pre-charge the brake system and assist the braking process through a sensor system including acceleration, yaw rate, and speed sensors, ensuring reliable operation even when primary systems may malfunction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If modern safety systems (CMS or CADS) are activated after an initial collision, then collision mitigation may be achieved, but the systems may not function satisfactorily due to unstable movement from the initial impact
Solution Approach 1:
The brake system is pre-charged before the driver applies the brake pedal, preparing the hydraulic system in advance to respond immediately when braking is requested, overcoming the delay that would normally occur after an initial collision
Solution Approach 2:
The system detects the initial collision and pre-activates the brake system in advance to counteract the potential harmful effect of delayed braking response, ensuring the brakes are ready to function immediately when the driver presses the pedal
2Ease of operation
If drivers apply the brake after being involved in a collision, then braking force may be generated, but the driver may not be capable of making a suitable braking request due to panic or distraction
Solution Approach 1:
The braking assistance system automatically detects the driver's braking intent through the pedal sensor and supplements the braking force without requiring the driver to manually modulate brake pressure, allowing the system to serve itself in assisting the driver's panicked or distracted braking attempt
3Speed
If the brake system is not pre-charged after an initial collision, then system complexity remains low, but braking response time is delayed when the driver applies the brake
Solution Approach 1:
The brake system is pre-charged in advance upon detection of an initial collision, storing hydraulic pressure ready for immediate release when the driver presses the brake pedal, thereby reducing braking response time without requiring complex real-time pressure modulation
Data Source
AI summary
A method and system for providing braking assistance in a motor vehicle after an initial collision involves detecting an initial collision, pre-charging a brake system, detecting an intent to brake on the part of a driver, and providing assistance to a braking process by means of a braking assistance system on the basis of the detection of the initial collision and the detection of intent to brake on the part of the driver.