This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
On-Centre Steering Wheel Torque Characteristics during Steady State Cornering
Technical Paper
2008-01-0502
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The steering wheel torque has an essential influence on the steering feel. In the chassis development process the tuning of the steering wheel torque characteristics is currently done empirically by altering the boost curve of the steering system. This paper shows how the steering assistance has to be chosen in order to achieve a harmonic steady-state steering wheel torque characteristics. It can be achieved by a linear rise of the defined steering assistance ratio versus the vehicle lateral acceleration. To determine the characteristics the gradient factor and the degressivity factor are needed only. The initial rise of the steering wheel torque versus the lateral acceleration is determined by the gradient factor. The degressivity factor describes the subsequent curvature of the characteristics. Based on this steering assistance ratio the required boost pressure of a hydraulic steering system or the required motor current of electro-mechanical steering system can be calculated instantly. The harmonic characteristics of the steering wheel torque are inherent. This analytical method is therefore best suited to determine the required steering assistance map in an efficient way.
Recommended Content
Technical Paper | A New Fuzzy Based Stability Index Using Predictive Vehicle Modeling and GPS Data |
Technical Paper | Power Steering ‘Road Feel’ |
Journal Article | A Fuzzy Based Stability Index Using a Right Sigmoid Membership Function |
Citation
Pfeffer, P. and Harrer, M., "On-Centre Steering Wheel Torque Characteristics during Steady State Cornering," SAE Technical Paper 2008-01-0502, 2008, https://doi.org/10.4271/2008-01-0502.Also In
References
- Mitschke M. Wallentowitz H. Vehicle Dynamics (Dynamik der Kraftfahrzeuge) 4 Springer-Verlag Berlin Heidelberg New York 2004
- Norman K. D. Objective Evaluation of On-Centre Handling Performance, Technical Report 840069 SAE 1984
- Bartenheier T. Potential of a driver and driving conditions dependent steering wheel torque characteristic 2004
- Harrer M Pfeffer P. E. Johnston D. N. Steering Feel - Objective Assessment of Passenger Cars Fisita Congress Yokohama 2006
- Heißing B. Brandl H. J. Subjective evaluation of vehicle handling 2002
- Braess H.-H. Steering System, Steering System Properties, Vehicle Dynamics -The Progress of the Last 50 Years, an Outlook into the future? 2001
- Pfeffer P.-E. Interaction of Vehicle and Steering System Regarding On-Centre Handling” University of Bath England 2006