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Modeling Steady-State Suspension Kinematics and Vehicle Dynamics of Road Racing Cars - Part I: Theory and Methodology
ISSN: 0148-7191, e-ISSN: 2688-3627
Published December 01, 1994 by SAE International in United States
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This paper presents basic suspension kinematics & vehicle dynamics concepts along with the equations necessary to model the steady-state handling behavior of road racing cars on a personal computer. Definitions for roll center, the roll resistance contribution of springs & anti roll bars, and instantaneous motion ratios are refined. These refined definitions correct several assumptions present in the classic design methods which lead to erroneous modeling results. These design methods and modeling equations are valid for the unequal length non-parallel type passive suspensions commonly found in competition vehicles.
This paper is part one in a two part series. The second paper (SAE Paper #942506) includes the design specifications and modeling results for a CART Indy car, IMSA GTS car and two Formula Fords. The computer model used to study the handling behavior of these cars was created with the methods and equations described in part one.
CitationCrahan, T., "Modeling Steady-State Suspension Kinematics and Vehicle Dynamics of Road Racing Cars - Part I: Theory and Methodology," SAE Technical Paper 942505, 1994, https://doi.org/10.4271/942505.
SAE 1994 Transactions: Journal of Commercial Vehicles
Number: V103-2; Published: 1995-09-01
Number: V103-2; Published: 1995-09-01
- Bastow, Donald Car Suspension and Handling London, England Pentech Press Limited 1990
- Campbell, Colin New Directions in Suspension Design Cambridge, MA Robert Bently, Inc. 1986
- Cole, D. Elementary Vehicle Dynamics : course notes in Mechanical Engineering Ann Arbor, MI University of Michigan 1972
- Costin, Michael Phipps David Racing and Sports Car Chassis Design Cambridge, MA Robert Bently, Inc. 1965
- Crahan, Thomas Modeling Steady-state Suspension Kinematics & Vehicle Dynamics of Road Racing Cars; Part II: Examples SAE paper # 942506 Warrendale, PA Society of Automotive Engineers, Inc. 1994
- Dixon, John C. Tyres, Suspension and Handling Cambridge, England Cambridge University Press 1991
- Gillespie, Thomas D. Fundamentals of Vehicle Dynamics Warrendale, PA Society of Automotive Engineers, Inc. 1992
- Howard, Geoffrey Chassis & Suspension Engineering London, England Osprey Publishing Limited 1987
- Iacovoni, D. H. Fundamentals of Automobile Handling Analysis Warrendale, PA Society of Automotive Engineers, Inc. 1969
- Incandela, Sal The Anatomy and Development of the Formula One Racing Car from 1975 Newbury Park, CA Haynes Publications, Inc. 1986
- Mola, Simone Fundamentals of Vehicle Dynamics Detroit, MI General Motors Institute 1978
- Olley, Maurice Suspension and Handling (Olley's Bible) Detroit, MI Chevrolet Engineering Center 1937
- Olley, Maurice Notes on Suspensions Detroit, MI Chevrolet Engineering Center 1961
- Olley, Maurice Suspensions Notes II Detroit, MI Chevrolet Engineering Center 1966
- Puhn, Fred How To Make Your Car Handle Tucson, AZ H.P. Books 1981
- Purdy, Alec Los Angeles, CA Ferret Inc. 1993 1994
- SAE Vehicle Dynamics Committee Vehicle Dynamics Terminology , SAE J670e Warrendale, PA Society of Automotive Engineers, Inc. 1978
- Smith, Carroll Prepare To Win Fallbrook, CA Aero Publishers, Inc 1975
- Smith, Carroll Tune To Win Fallbrook, CA Aero Publishers, Inc. 1978
- Staniforth, Allan Competition Car Suspension; Design, Construction, Tuning Somerset, England Haynes Publishing Group 1988
- Terry, Len , and Baker Alan Racing Car Design and Development Cambridge, MA Robert Bently, Inc. 1973
- Van Valkenburgh, Paul Race Car Engineering & Mechanics 2nd . Ed Seal Beach, CA Van Valkenburgh, Co. 1986