| 摘要 |
PROBLEM TO BE SOLVED: To prevent a tire from being rotated unnecessarily, when a brake is operated and released, at speed control based on driving force of a subjected vehicle. SOLUTION: In this chassis dynamometer, a wheel speed is found based on the wheel torque FD estimated from the shaft torque, and based on equivalent models 8-11 of the subjected vehicle 4 by applying rotational driving forces respectively to rollers 1R, 1L by the driving forces generated both driving wheels of the subjected vehicle 4, and by coupling mechanically motors 3R, 3L as power absorption means respectively to the both rollers, and speeds of the motors are controlled by a speed controller 6, by using the wheel speed as a speed command V. In the chassis dynamometer, a stop condition determination part 12 brings the output of a body speed computing part 9 forcibly to zero, when roller speeds are under substantially stopped conditions and when slippage is not being generated between a virtual body speed and the roller speeds, during a test. COPYRIGHT: (C)2007,JPO&INPIT
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