| 摘要 |
PURPOSE:To generate a speed command value stably and faithfully by integrating the torque output of a torque meter fitted to the driving shaft of an automobile and controlling the control valve of a hydraulic pump motor according to the integral value and the rotating speed of said driving shaft. CONSTITUTION:When the engine 1 of the automobile to be tested is driven, the torque between the driving shaft 2 and hydraulic pump motor 4 is detected by the torque meter 3. The detected torque is integrated by a function generator 6 according to a specific arithmetic expression to obtain the control command speed. This obtained speed command value is added by an adder 7 to the rotating speed of the driving shaft 2, i.e. a value corresponding to the traveling speed and their difference is inputted to the control valve 4a of the hydraulic pump motor 4. Consequently, the speed command value is generated stably and faithfully. Further, the influence of the disturbance of rotating speed control on the torque is reduced, so traveling close to actual traveling can be simulated.
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