Electric Power Steering Adaptation for Drive Interference Compensation
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Solution Overview
Problem
Conventional steering systems lack feedback to the driver and fail to effectively compensate for drive influences due to uneven drive shafts, all-wheel systems, and varying friction values, leading to distorted steering behavior and reduced driving safety.
Innovation Solution
Adapting steering characteristics using electric power steering systems by determining and evaluating dynamic drive system parameters, such as steering angle signals, slip control, and brake stability systems, to compensate for drive influences and provide sensitive feedback to the driver without compromising comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If pull/drift compensation is applied permanently and globally, then steering stability is improved, but feedback on driving state is distorted
Solution Approach 1:
The patent applies dynamics by transitioning from permanent, global pull/drift compensation to dynamic, selective compensation. The system continuously monitors drive influences (acceleration, braking, torque distribution) and activates compensation only when specific conditions are met, allowing the steering characteristics to adapt in real-time to actual driving situations while preserving accurate feedback to the driver
Solution Approach 2:
The patent applies local quality by making compensation specific to particular drive influences rather than applying it globally. Different compensation strategies are applied based on the local condition (acceleration, braking, torque steer, μ-split) ensuring that compensation is provided only where and when needed, maintaining steering stability without distorting overall driving state feedback
2Ease of operation
If steering support is applied as a function of vehicle speed, then steering characteristics are improved, but compensation for drive influences is insufficient
Solution Approach 1:
The patent applies universality by creating a steering support system that handles multiple functions: speed-dependent steering characteristics, acceleration compensation, braking compensation, torque steer compensation, and μ-split compensation. This multi-functional approach ensures comprehensive reliability across all driving situations while maintaining ease of operation through integrated control
Solution Approach 2:
The patent applies parameter changes by adjusting steering support based on multiple parameters beyond just vehicle speed. The system monitors and responds to acceleration, braking force, torque distribution, wheel friction values, and other dynamic parameters, allowing comprehensive compensation for various drive influences while adapting steering characteristics to current operating conditions
Data Source
AI summary
A method for adapting steering characteristics of a motor vehicle with an electric power steering system, including determining of steering angle signals of a steering train utilizing at least one steering angle sensor in the steering train, determining measuring and control quantities of a dynamic drive system, and adapting the steering characteristics based on the steering angle signals and the measuring and control quantities.