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The Influence of Steering and Suspension System Degradation on Vehicle Limit Performance
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English
Abstract
The influence of degraded steering and suspension components on open-loop vehicle performance at the limits of tire-road frictional coupling is examined in this paper. The major conclusion obtained is that, with the exception of the shock absorber in certain maneuvers, the range of limit performance exhibited by new cars, as derived from design differences, is much larger than the in-use changes in limit performance of individual vehicles deriving from degradation of steering and suspension system components. This result should lead to future studies in which:
- 1.The influence of steering and suspension system degradation in the nonlimit regime of vehicle operation is examined.
- 2.Equipment for on-the-vehicle evaluation of suspension damping is investigated.
- 3.Greater emphasis is placed on the degradation of tires and brakes.
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Citation
Fancher, P., Ervin, R., and Segel, L., "The Influence of Steering and Suspension System Degradation on Vehicle Limit Performance," SAE Technical Paper 740149, 1974, https://doi.org/10.4271/740149.Also In
References
- Fancher P. S. Ervin R. D. Grote P. MacAdam C. Segel L. “Limit Handling Performance as Influenced by Degradation of Steering and Suspension Systems.” Two Vols., Final Report, Contract DOT-HS-031-1-126, Highway Safety Research Institute Univ. of Michigan November 1972
- Dugoff H. Ervin R. D. Segel L. “Vehicle Handling Test Procedures.” Highway Safety Research Institute Univ. of Michigan Ann Arbor 2 November 1970
- Hartz J. R. “Computer Simulation of Vehicle Handling.” The Bendix Corp. Res. Labs., a Report to NHTSA, Contract No. FH-11-7563 September 1972
- Ervin R. D. Grote P. Fancher P. S. MacAdam C. C. Segel L. “Vehicle Handling Performance.” Highway Safety Research Institute Univ. of Michigan Ann Arbor 3 November 1972
- Ervin R. D. Fancher P. S. Segel L. “Refinement and Application of Open-Loop Limit Maneuver Response Methods.” Paper 730491 presented at SAE National Automobile Engineering Meeting Detroit May 1973
- Bird K. D. Belsdorf M. R. Rice R. S. “Effects of Steering and Suspension Component Degradation on Automobile Stability and Control.” Calspan Corp. 6 a Report to NHTSA, Contract No. FH-11-7384 January 1971
- Merrill M. S. “Steering Diagnosis: A Study of Degraded Components Affecting In-Use Vehicle Handling.” Clayton Mfg. Co. 2 a Report to NHSB, Contract No. FH-11-6629 September 1969
- Dugoff H. Segel L. Ervin R. D. “Measurement of Vehicle Response in Severe Braking and Steering Maneuvers.” SAE Transactions 80 1971 710080