Method and Apparatus For Measuring Tire Rolling Resistance
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United States of America Patent
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N/A
Issued Date -
Jan 2, 2014
app pub date -
Jun 26, 2013
filing date -
Jun 29, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method by which a vehicle wheel service system, having at least one load roller for applying a generally radial load to a wheel assembly mounted on a driven spindle shaft during rotation thereof, provides a measurement which is representative of the loaded rolling resistance of the wheel assembly undergoing testing. In order to rotationally drive the spindle shaft with the vehicle wheel assembly mounted there on, energy is supplied to a drive motor operatively coupled to rotationally drive the spindle shaft. By monitoring the amount of energy or drive torque required to rotationally drive the spindle shaft and achieve and maintain a desired rotational speed for the wheel assembly when engaged with the load roller, a measurement which is related to the loaded rolling resistance of the wheel assembly is obtained by the vehicle wheel balancing system.
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