Steering Handle Brake for Emergency Maneuver Uncoupling
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Solution Overview
Problem
Existing steering apparatuses for two-track vehicles cause driver irritation and complicate re-coupling after automatic emergency avoidance maneuvers due to the freely rotatable steering wheel during such maneuvers.
Innovation Solution
A brake is electrically actuated by the control device to lock the steering handle in its uncoupling position during emergency avoidance maneuvers, providing a brake torque that can be adjusted based on the direction of steering handle rotation to ensure seamless operation and simplify re-coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the clutch is opened to uncouple the steering wheel from the steering system during emergency avoidance maneuver, then the steering system can perform high-dynamic steering angles independently, but the steering wheel becomes freely rotatable causing driver irritation and making re-coupling difficult
Solution Approach 1:
A brake device is introduced as an intermediary element between the driver and the freely rotatable steering wheel. The brake device applies braking force to the steering wheel shaft, preventing free rotation while the clutch remains open. This mediator allows the steering system to execute emergency avoidance maneuvers independently while maintaining driver control and facilitating easy re-coupling by simply releasing the brake.
2Ease of operation
If the steering wheel is locked to prevent free rotation, then driver irritation is avoided and re-coupling is simplified, but the steering system cannot perform high-dynamic emergency avoidance maneuvers
Solution Approach 1:
The brake device is designed with dynamic control characteristics, adjusting its braking force based on the operational state. During normal driving, the brake is inactive allowing free steering. During emergency avoidance maneuvers, the brake applies controlled braking force to prevent free rotation while permitting the steering actuator to execute the maneuver. The brake force is dynamically adjusted to balance driver control needs with system performance requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution prevents driver irritation and simplifies re-coupling by maintaining the steering handle's position during emergency maneuvers, enhancing safety and comfort by providing haptic feedback and ensuring correct positioning for seamless re-coupling.
Implementation Method 1
a brake electrically actuatable by the control device is assigned to the steering handle. The control device can actuate the brake during the emergency avoidance maneuver such that the steering handle is fixed in its uncoupling rotary position
Data Source
AI summary
A steering apparatus for a two-track vehicle may include a steering handle, in the case of whose rotary actuation the steerable vehicle wheels can be turned by a wheel steering angle, and a control device to electrically actuate a steering actuator for setting the wheel steering angle was a function of driving operational parameters and independently of the steering handle and a clutch that provides a releasable mechanical steering connection between the steering handle and the steerable vehicle wheels. An automatic avoidance manoeuvre may be carried out in the case of a risk of collision, in which the control device fully releases the clutch, and the control device actuates the steering actuator such that the vehicle briefly leaves its driving lane and is then brought back into the driving lane. The control device also actuates a braking of the steering handle during the collision avoidance manoeuvre.