VEHICLES-IN-USE SUB-LIMIT MANEUVERS. VOLUME III: EFFECTS OF VEHICLE-IN-USE SPRING SAG ON VEHICLE HANDLING AND BRAKING
The report presents results of an investigation into the influence of sagged coil springs and coil spring spacers on handling performance of two full-sized automobiles. The findings relate vehicle stability factor (a measure of the basic understeer intentionally designed into the vehicle steering and handling characteristics) and controllability with change in ride height, sprung mass roll axis, and suspension bump-stop bottoming. Results show consistent and measurable differences in handling parameters, depending upon location of sagged spring and use of spring spacers. The least desirable situation is asymmetric (i.e., one side only) sagged spring and spacer usage which produces different handling response in left versus right maneuvers and can lead to vehicle controllability problems.
- See also Volume 1, PB81-159501, HS-805 697 and Volume 2, PB81-159519, HS-805 698. Also available in set of 3 reports PC E11, PB81-159493.
Systems Technology, Incorporated13766 South Hawthorne Boulevard
Hawthorne, CA USA 90250
Washington, DC USA 20590
- Johnston, D E
- Schwartz, S H
- Publication Date: 1980-9
- Features: References;
- Pagination: 50 p.
- TRT Terms: Automated vehicle control; Automobiles; Braking; Driving; Dynamic loads; Handling characteristics; Motor vehicles; Performance evaluations; Spacing; Springs (Vehicles); Stability (Mechanics); Steering; Structural members; Vehicle tests
- Uncontrolled Terms: Dynamic response; Lateral stability
- Old TRIS Terms: Helical springs; Spacers
- Subject Areas: Vehicles and Equipment;
- Accession Number: 00329073
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: TR-1119-1-III Final Rpt., HS-805 700
- Contract Numbers: DOT-HS-7-01799
- Files: HSL, NTIS, USDOT
- Created Date: May 21 1982 12:00AM