Dynamometer and method for simulating vehicle road load and/or i

Details Dynamometer and method for simulating vehicle road load and/or i Dynamometer and method for simulating vehicle road load and/or i

1992-08-21

1995-01-31

Williams, Hezron E.

Measuring and testing

Vehicle chassis

Steering

7386218, G01L 513

Patent

active

053850424

ABSTRACT:
A dynamometer for testing engine powered vehicles including an induction motor coupled directly to the vehicle engine or the driven wheels thereof. A computer in response to the engine or wheel speed and the torque applied to or received from the engine or wheels by the motor provides a desired torque signal to a motor power controller to similate the road load and/or vehicle inertial forces encountered by the vehicle during actual operation and to compensate for the parasitic losses of the dynamometer. The motor power controller in turn applies a d.c. voltage to the motor when the desired torque signal is negative to cause the motor to absorb power from the engine or driven wheels and applies an a.c. voltage to the motor when the desired torque signal is positive to cause the motor to supply power to the engine or driven wheels in accordance with the parasitic losses and the road load and/or inertial forces to be simulated by the induction motor.

REFERENCES:
patent: 3017553 (1962-01-01), Homan
patent: 3955410 (1976-05-01), Wakabayashi et al.
patent: 4161116 (1979-07-01), Fegraus et al.
patent: 5101660 (1992-04-01), La Belle
Severino D'Angelo And R. D. Gafford "Advantages of Using Microcomputers in Dynamometer Controllers" 1981; SAE Technical Paper No. 810749.
Arthur L. Cook and Clifford C. Carr "Elements of Electrical Engineering" 1924 6th Edition; Library of Congress Card No. 53-11045.
Severino D'Angels and R. D. Gafford "Feed-Forward Dynamometer Controller for High Speed Inertia Simulation 1981"; SAE Technical Paper No. 810749.

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