This content is not included in your SAE MOBILUS subscription, or you are not logged in.
DEVELOPMENT OF MAXIMUM ALLOWABLE HITCH LOAD BOUNDARIES FOR TRAILER TOWING
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1980 by SAE International in United States
Annotation ability available
This paper presents an analytically based approach to specifying a maximum allowable hitch load for passenger cars pulling trailers. The change in tow car steady-state directional stability, i.e., understeer, is the basis for the specification. This handling parameter is a function of hitch load, lateral acceleration, tow car to trailer weight ratio, and the amount of load leveling applied by a Class III hitch. Using these variables an allowable hitch load range was defined as that which would insure positive tow car understeer up to and including 0.3 g cornering. Over 50 combination-vehicle configurations (using three tow car sizes and eight trailers) were then tested in order to validate and revise the analytical boundaries. Based on these results a tow car stability criterion derived from maximum hitch load considerations appears a valid format for the trailer user and/or manufacturer.
|Technical Paper||Effects of Trailer Hookup Practices on Passenger Car Handling and Braking|
|Technical Paper||Determination of Trailer Stability Through Simple Analytical Methods and Test Procedures|
CitationKlein, R. and Szostak, H., "DEVELOPMENT OF MAXIMUM ALLOWABLE HITCH LOAD BOUNDARIES FOR TRAILER TOWING," SAE Technical Paper 800157, 1980, https://doi.org/10.4271/800157.
- Johnston, D. E. Zellner, J. W. Ashkenas, I. L. “Handling Test Procedures for Passenger Cars Pulling Trailers. Vol. II: Technical Report.” DOT HS-801 936 June 1976
- Klein R. H. Szostak, H. T. “Effects of Weight Distributing Hitch Torque on Car-Trailer Directional Control and Braking.” DOT HS-803 248 October 1977
- Collins R. L. Wong, J. P. “Stability of Car Trailer Systems with Special Regard to Trailer Design.” “Journal of Dynamic Systems, Measurement and Control,” 96 No. 2 June 1974
- “Trailer Towing Performance — Passenger Cars and Multipurpose Passenger Vehicles.” “Federal Register,” 35 No. 157 Thursday, 13 August 1970
- “Vehicle Dynamics Terminology,” SAE J670d July 1975
- Bundorf, R. T. “Directional Control Dynamics of Automobile-Trailer Combinations.” Paper 670099 presented at SAE Automotive Engineering Congress, Detroit January 1967
- “Passenger Car and Light Truck Steady State Directional Control Test Procedures,”
- Szostak, H. T. “Development of Car/Trailer Handling and Braking Standards. Vol. III: Appendices.” Systems Technology, Inc. November 1979
- Klein R. H. Szostak, H. T. “Determination of Trailer Stability Through Simple Analytical Methods and Test Procedures,” in “Dynamics of Wheeled Recreational Vehicles,” SAE SP-443 February 1979 47 53
- DiLorenzo, F. A. “ESV Dynamic Performance.” Paper 730080 presented at SAE International Automotive Congress and Exposition, Detroit January 1973
- Rice, R. S. et al “Automobile Driver Characteristics and Capabilities — The Man-Off-the-Street.” Paper 760777 preented at SAE Automobile Engineering Meeting, Detroit October 1976
- Hayes, G. G. et al. “Determination of Motor Vehicle Characteristics Affecting Driver Handling Performance. Vol. I: Technical Report. Vol. II: Appendices.” DOT HS-801 421 and 422 March 1975
- McRuer, D. T. Klein, R. H. et al. “Automobile Controllability — Driver/Vehicle Response for Steering Control I February 1975
- Weir D. H. DiMarco, R. J. “Correlation and Evaluation of Driver/Vehicle Directional Handling Data.” Paper 780010 presented at SAE International Automotive Congress and Exposition, Detroit February 1978
- “Geometric Design Standards for Highways Other Than Freeways, 1969.” American Association of State Highway Officials 1969