Steering Torque Compensation During Braking Events
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Solution Overview
Problem
Active steering systems fail to compensate for steering torque disturbances during vehicle braking events, leading to discomfort and interference for the driver.
Innovation Solution
A method and system that detect a braking event and apply a torque compensation signal through the steering control unit, adjusting threshold values and torque limits based on vehicle information and the presence of a spare wheel to counteract brake pull and maintain driver comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If active steering systems compensate for disturbances during vehicle motion, then driver comfort is improved, but steering torque disturbances during braking events are not compensated
Solution Approach 1:
The steering control unit dynamically adjusts its compensation behavior based on detected braking events. The system transitions from a static compensation mode to a dynamic mode where braking-induced torque disturbances are actively compensated, allowing the system to adapt to different operational states (normal driving vs. braking) and resolve the contradiction between maintaining driver comfort and expanding compensation coverage.
Solution Approach 2:
The system changes its operational parameters by detecting braking events through vehicle signals (brake pressure, deceleration, engine torque) and adjusting the torque compensation accordingly. This parameter change enables the system to differentiate between normal driving conditions and braking events, applying appropriate compensation strategies for each state to improve both driver comfort and compensation versatility.
2Ease of operation
If steering torque compensation is applied during braking, then brake pull interference is reduced, but system complexity increases
Solution Approach 1:
The steering control unit utilizes existing vehicle signals (brake pressure sensors, deceleration data, engine torque information) that are already available in the vehicle's communication network. By processing these existing signals through established evaluation logic, the system achieves braking event detection and torque compensation without adding substantial new sensors or complex hardware, thus reducing the increase in system complexity while still improving steering control during braking.
3Measurement precision
If threshold values are adjusted for spare wheel detection, then compensation accuracy is improved, but calibration complexity increases
Solution Approach 1:
The system performs preliminary detection of spare wheel presence by evaluating braking behavior patterns before final compensation decisions are made. By using preliminary threshold evaluations and pattern recognition, the system can identify spare wheel configurations and adjust subsequent compensation parameters accordingly, improving detection accuracy while minimizing the need for complex manual calibration procedures through automated pattern-based adaptation.
Data Source
AI summary
A system and method for steering torque compensation carried out in a controller of a vehicle that detects a braking event from a comparison of actual vehicle information with a corresponding threshold value, determines a steering torque compensation signal, generates a request to implement the steering torque compensation signal, and implements the steering torque compensation signal during the braking event.