Steering Wheel Decoupling for Evasive Maneuver Comfort
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Solution Overview
Problem
Existing driver assistance systems for motor vehicles often result in jerky and rapid steering wheel movements during automatic emergency evasive maneuvers, posing a risk to the vehicle driver and reducing the acceptance of such systems.
Innovation Solution
A method and motor vehicle system that includes an environment detection device, a steering angle adjustment device, and a decoupling mechanism to reduce the rotational movement of the steering wheel during automatic adjustments, ensuring the steering wheel's movement is less disruptive and safer for the driver by decoupling it from the steering angle adjustments made by the steering angle adjusting device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the steering wheel is fixedly coupled to the automatic steering system for continuous steering support, then the driver receives constant steering interventions and the system provides reliable lateral guidance, but the steering wheel develops jerky and rapid movements that seem to have a life of its own, reducing driver acceptance and safety
Solution Approach 1:
The steering system is segmented into two independent parts: the automatic steering system that controls the steering angle, and the steering wheel that can be decoupled from it. The decoupling device separates the steering wheel's rotational movement from the steering angle adjustment, allowing the automatic system to operate reliably while preventing harmful jerky movements from being transmitted to the steering wheel.
Solution Approach 2:
The decoupling device acts as an intermediary between the automatic steering system and the steering wheel. It mediates the connection by allowing the steering angle to be adjusted independently while preventing the steering wheel from experiencing rapid rotational movements, thus protecting the driver while maintaining system functionality.
2Object-affected harmful factors
If the steering wheel is decoupled from the steering angle adjustment during automatic emergency evasive maneuvers, then the driver is protected from injury due to reduced steering wheel rotational movement, but the driver loses direct feedback and control over the steering adjustments
Solution Approach 1:
The coupling between the steering wheel and steering angle adjustment is made dynamic rather than fixed. The decoupling device can adaptively connect or disconnect the steering wheel from steering angle adjustments based on the driving situation. During normal operation, the connection is maintained for driver feedback; during automatic emergency maneuvers, the connection is decoupled to protect the driver from injury.
Data Source
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Figure 3
AI summary
The invention relates to a method for operating a motor vehicle (1) comprising the steps of: a) detecting an object (6) in the vicinity (E) of the motor vehicle (1) by means of an area detection device (2); b) assessing the risk of a collision between the motor vehicle (1) and the object (6); c) depending on the assessment, adjusting the steering angle (a) of the motor vehicle (1) by means of a steering angle adjustment device (3); and d) depending on the adjustment in step c), decoupling a steering wheel (4) of the motor vehicle (1) with a decoupling device (5), so that the rotational movement of the steering wheel (4) due to the adjustment of the steering angle (a) is less than if the same adjustment were made with the steering wheel (4) not decoupled.