Steer-By-Wire Steering Wheel Rotation Stop for Stable Control
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Solution Overview
Problem
Steer-by-wire steering devices lack mechanical connection between the steering wheel and wheels, leading to indefinite rotation and poor steering feel and stability, posing safety risks in autonomous driving modes.
Innovation Solution
A steer-by-wire steering device with a connecting shaft, rotating member, guide member, and supporting member that stops the steering wheel from further rotation when it reaches a maximum point, utilizing a driving motor and electronic control unit to manage rotation based on driving mode signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If steer-by-wire steering device eliminates mechanical linkages between steering wheel and wheels, then steering convenience and control precision are improved, but steering stability and driver safety deteriorate due to indefinite rotation of steering wheel
Solution Approach 1:
The patent replaces the traditional mechanical linkage system (universal joints, pinion shafts) with an electric motor-driven steering mechanism. The motor converts electrical signals into rotational motion to steer the wheels, eliminating physical connections while maintaining steering functionality. This substitution provides precise control through electronic signals while avoiding the complexity and safety issues of mechanical linkages.
Solution Approach 2:
The patent introduces an electronic control unit and motor as intermediary components between the steering wheel and the wheels. Instead of direct mechanical coupling, the steering wheel's rotational position is detected by sensors, processed by the control unit, and converted into motor-driven wheel steering. This intermediary system enables precise steering control while allowing the steering wheel to rotate independently without direct mechanical constraints.
2Adaptability or versatility
If steer-by-wire steering device allows free rotation of steering wheel, then steering flexibility is improved, but driver safety deteriorates in emergency situations where driver's body part may be stuck to steering wheel
Solution Approach 1:
The patent implements preliminary safety measures by designing the steering column with built-in mechanical stoppers or limiting mechanisms that prevent the steering wheel from rotating beyond safe angular limits. These physical constraints are pre-configured to stop the steering wheel before it can cause injury to the driver's body parts, while still allowing sufficient rotation range for normal steering operations and emergency maneuvers.
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
Enhances driver steering feel and stability in both manual and autonomous driving modes by preventing excessive wheel rotation, ensuring safety in emergency situations.
Implementation Method 1
a driving member rotating the connecting shaft by electric power of a driving motor
Data Source
AI summary
The present embodiments may provide a steer-by-wire steering device that may enhance the driver's driving feel and increase the driver's steering stability and convenience in manual driving mode and autonomous driving mode by stopping the steering wheel from further mechanical rotation when the wheel rotation reaches a maximum point.