CHASSIS DYNAMO FOR BRAKE TEST

摘要

PURPOSE:To accurately simulate an actual vehicle run state by computing an electric inertial load corresponding to the run acceleration of a vehicle to be tested by using a power measurement controller and bringing the output torque of a dynamometer under feedback control. CONSTITUTION:The detection output of a hydraulic pressure sensor 54 which detects the hydraulic pressure in a master cylinder 26 is inputted to an actuator 52 and a cylinder 50 is so controlled that the detection output coincides with the set value of a hydraulic pressure setter 44. The fixed inertia W2 of a chassis dynamo which is set by a fixed inertia setter 76 is subtracted from the vehicle weight W1 of the vehicle 10 to be tested which is set by a weight setter 74 and the difference is multiplied by deceleration alpha found by differentiating the output of the rotating speed sensor 80 for a dynamometer 16 to computer the inertial load. Then, this arithmetic output is collated by a collator 90 with the detected torque of the torque sensor 18 and electric power supplied from a three-phase AC power source 96 to the dynamometer 16 is controlled so that the fluctuating torque of the dynamometer 16 coincides with the electric inertial load.