Retractable Steering Column for Autonomous Cabin Space
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Solution Overview
Problem
In vehicles equipped with autonomous driving assist systems, the steering wheel is not needed to rotate, creating a need for a steering column assembly that can be manipulated in position or purpose to optimize space and functionality for drivers during non-driving activities.
Innovation Solution
A control system for a steering wheel that can switch between rotational and non-rotational conditions, coupled with a steering gear and a controller, allowing the steering wheel to be retracted and used for non-driving activities while maintaining control over the vehicle's direction through a decoupling assembly and sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the steering wheel is made retractable to increase cabin space for non-driving activities, then the driver's ability to perform non-driving activities is improved, but the quick reversion to driving mode may be compromised
Solution Approach 1:
The steering column assembly is designed to be dynamically adjustable between retracted and extended positions. The system uses sensors to detect driver presence and hand gestures, automatically transitioning the steering column between positions. This dynamic behavior allows the system to optimize cabin space during autonomous mode while ensuring rapid reversion when driving mode is detected, resolving the contradiction between space utilization and response time.
2Adaptability or versatility
If the steering wheel is retracted during autonomous driving, then space for non-driving activities is increased, but the driver's control over the vehicle may be compromised
Solution Approach 1:
The system incorporates sensors that continuously monitor driver presence, hand gestures, and system mode. This feedback mechanism ensures that the steering column only retracts when autonomous mode is confirmed and the driver's hands are off the wheel. When driving mode is detected or the driver reaches for the wheel, the system receives feedback and immediately extends the column, maintaining reliable vehicle control while enabling multi-functionality during autonomous operation.
3Adaptability or versatility
If the steering column is made movable between positions, then space optimization is improved, but the system complexity increases
Solution Approach 1:
The steering column assembly is designed with multi-functionality, serving both as a structural support for the steering wheel and as a movable element for space optimization. The same mechanical structure that provides steering support also enables position adjustment through integrated sensors and actuators. This universal design approach allows position adjustment capability without proportionally increasing system complexity, as the column serves multiple purposes regardless of its position.
Data Source
AI summary
A control system for a steering wheel includes a steering wheel switchable between a rotational condition and a non-rotational condition. The control system also includes a steering gear operatively coupled to a plurality of road wheels of a vehicle, the steering wheel and the steering gear electrically coupled to each other. The control system further includes a controller in operative communication with the steering wheel and the steering gear, the controller configured to control the steering gear independent of the steering wheel when the vehicle is in an autonomous vehicle driving condition, the steering wheel being in a retracted position during the autonomous vehicle driving condition.