Motor vehicle onboard speed indicator or tachometer calibration device, comprises a rolling road test bed with means for measuring percentage speed error based on creep during free wheeling and creep for a driven wheel

摘要

Method for calibrating a vehicle speed indicator as a function of speed and loading. The method involves determination of a calibration table or curve that supplies an error valve in percent as a function of speed. The percentage error is obtained for each speed as a sum of the creep during free wheeling and the creep of a driven wheel. An Independent claim is made for a calibration device for calibration of a motor vehicle onboard speed indicator.