Abstract

The focus of this paper would be on the design of steering system for a small formula race type vehicle. The design would consist of determining steering geometry with the use of tire models and optimizing the deign to have the best possible design. Ackermann Geometry, Anti Ackermann, parallel steer will be discussed and the ways to obtain the desired geometries will also be focussed on. The effect of steering on other parameters like roll centre will also be discussed. The importance of reducing bump steer and the methods of doing it will also be discussed.

Highlights

  • The focus of this paper is to understand dynamics of vehicle related to design of steering geometry and how to design a steering geometry as per track requirement and use of tire data

  • The steering system needs to be such that the car can cover all turns on the track and give accurate steering feel to the driver

  • Ackermann: In Ackermann geometry, the inner tire in a corner turns more than the outer tire with the same input steering angle

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Summary

Introduction

The focus of this paper is to understand dynamics of vehicle related to design of steering geometry and how to design a steering geometry as per track requirement and use of tire data. The paper will focus both on static and dynamic design of the steering system and will take into consideration the parameters to be kept in mind while designing a fast responding system with enough steering feel. The paper will present a step by step analysis of the design phase and how a kinematic steering software can be used to determine correct geometry

Requirements of steering system
Three types of steering geometry
Design
How to determine steering curve
Tire drag
Caster and mechanical trail
Bump steer
Roll centre and steering linkages
Conclusion
Full Text
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