Adaptive Vehicle Airbag System for Steering Wheel Obstacle Protection
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Solution Overview
Problem
In highly automated vehicles, the conventional airbag systems may not effectively protect drivers when they are engaged in activities that place objects between the steering wheel airbag and their head, as these objects can be endangered or become projectiles during an accident, necessitating an adaptive occupant protection system that considers the steering wheel status and expansion space.
Innovation Solution
An occupant protection device with an airbag system that includes a first airbag extending from bottom to top and a second airbag from top to bottom, controlled by a sensor system and evaluation unit that assesses the steering wheel status and expansion space to optimize airbag deployment based on instantaneous conditions, ensuring effective protection by activating the appropriate airbag(s) to prevent harm to the driver and other occupants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a steering wheel airbag is used to protect the driver, then head protection is improved, but objects on the steering wheel become dangerous projectiles
Solution Approach 1:
The airbag system is segmented into multiple independent airbags (first airbag in steering wheel, second airbag in dashboard, third airbag in roof frame) that can be selectively deployed based on detection results, allowing the system to choose the safest deployment option rather than always deploying the steering wheel airbag
Solution Approach 2:
The sensor system performs preliminary detection of objects on the steering wheel before a collision occurs, allowing the control unit to pre-determine which airbag should be deployed to avoid the projectile hazard while maintaining head protection
2Ease of operation
If the steering wheel is adjusted to a stored position to provide more space, then driving comfort is improved, but the first airbag cannot effectively protect the driver
Solution Approach 1:
The airbag deployment system is made dynamic by continuously monitoring the steering wheel position and automatically selecting the appropriate airbag (first or second) based on whether the steering wheel is in normal or stored position, ensuring effective protection adapts to the current configuration
Solution Approach 2:
The sensor system acts as an intermediary that detects steering wheel position and communicates this information to the control unit, which then selects the appropriate airbag deployment strategy to bridge the gap between different steering wheel configurations and effective protection
3Adaptability or versatility
If multiple sensors are added to detect steering wheel status and expansion space, then system adaptability is improved, but device complexity increases
Solution Approach 1:
The sensor system is designed with multi-functionality, using sensors that can detect multiple parameters (steering wheel position, objects in expansion space, collision forces) to reduce the total number of separate sensing systems needed while maintaining high adaptability
Solution Approach 2:
The evaluation and control unit combines multiple detection functions into a single integrated control system that processes information from various sensors and makes unified deployment decisions, reducing overall system complexity while maintaining adaptability
Data Source
AI summary
An occupant protection device for a vehicle, including an airbag system which, for protecting an occupant, includes at least one first airbag whose expansion movement in the vehicle longitudinal direction extends toward the occupant and in the vehicle vertical direction extends from bottom to top, and a second airbag whose expansion movement in the vehicle longitudinal direction extends toward the occupant and in the vehicle vertical direction extends from top to bottom, at least one sensor system that detects collision-relevant and/or occupant-relevant information, and an evaluation and control unit that evaluates the collision-relevant and/or occupant-relevant information and controls the airbag system as a function of the evaluation.