Vehicle Wheel Suspension Torque Steer Reduction
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Solution Overview
Problem
Existing vehicle wheel suspensions experience undesirable self-steering behavior due to the 'torque steer effect' at high acceleration, which is not adequately addressed by conventional designs.
Innovation Solution
A wheel suspension system incorporating a transverse control arm with specific articulation points and a rod-shaped control arm that applies force between these points, reducing relative rotation and enhancing kinematic behavior to achieve 'wheel center recession' during spring compression, thereby reducing the torque steer effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the bearing element is rotatably mounted on the carrier with the rotational axis extending substantially vertical near the wheel center, then the torque steer effect is markedly reduced, but the unit formed from the carrier and spring damper strut rotates undesirably
Solution Approach 1:
The control arm is divided into a transverse control arm and an additional control arm, with the additional control arm connecting the carrier to the transverse control arm. This segmentation allows independent optimization of each control arm's function to reduce torque steer while stabilizing the carrier assembly
Solution Approach 2:
The additional control arm acts as an intermediary element between the carrier and the transverse control arm, providing a mechanical connection that reduces relative rotation between these components while maintaining the beneficial torque steer reduction effects
2Stability of the object's composition
If an additional control arm is connected to the carrier and transverse control arm, then relative rotation between the transverse control arm and carrier is reduced, but the device complexity increases
Solution Approach 1:
The additional control arm performs multiple functions: it reduces relative rotation between the carrier and transverse control arm, contributes to torque steer reduction, and provides structural support. This multi-functionality justifies the added component by eliminating the need for separate stabilization mechanisms
Data Source
AI summary
A wheel suspension for a vehicle including a carrier having a rotatably mounted bearing element. A spring damper strut connects to the carrier and the vehicle structure. A transverse control arm connects to the carrier at one end and at the other end to the vehicle structure. A control member connects to the carrier and the transverse control arm. The control member arranged relative to the transverse control arm such that a force application line of the control member is inclined toward a transverse control arm axis defined by a point of articulation of the transverse control arm on the structure side and a point of articulation of the transverse control arm on the carrier side wherein the force application line and the transverse control arm axis intersect between the points of articulation of the transverse control arm on the structure side and the carrier side.