This system measures the rolling resistance of each tire accurately. In addition to the simultaneous measurement of tire loss resistance and rolling resistance coefficient for each drive by mode operation (JC08, WLTC), coasting test, constant acceleration/deceleration test and transient mode test are able to be performed. Furthermore, measurement of driving noise/ vibration of the tire, effect of the tire loss due to the temperature change can be verified by adding options.
Conforming the JIS D 4234: 2009 and ISO 28580: 2009.
Driving resistance control with the motor for roller (same as the chassis dynamometer)
Speed control while driving with the motor for roller
Mode operation while driving and controlling the speed with the motor for tire
Calculation of rolling resistance and loss work from two shaft torque detectors
|Measurement accuracy||Tire weight||
|Air pressure||±1 kPa|
|Shaft force||±0.05 % F.S.|
|Input torque||±0.05 % F.S.|
|Surface speed||±0.1 km/h|
|Angular velocity||±0.1 %|
|Environmental temperature||Standard||25 ± 2 ℃|
*Please contact us for the detailed specification.
Measurement data examples
Measurement of rolling resistance coefficient in stationary test
Rotate tire with constant speed at 80 km/h and measure the rolling resistance coefficient from its driving torque. In a same manner, measure at constant speed at 60, 40, and 20 km/h.
The rolling resistance coefficients of both tires were almost the same, even if the vehicle speed is different.
Rolling resistance coefficient measurement in coasting test
Measure rolling resistance coefficient in coasting test same as the chassis dynamometer. Immediately after the speed has been increased to 100 km/h, perform coasting driving.
Measurement point: 80, 60, 40, 20 km/h
Weight condition: 3826 N
Warming up condition: 30 minutes at 60 km/h before the test
As the vehicle speed is higher, the rolling resistance coefficient tends to increase.
Calculation method of running resistance
JIS D 4234: 2009(JATMA), ISO 28580: 2009(MOD), JASOE015