A Servo Vehicle Driver for EPA Emission Tests 730532
An electronic servo controller, combined with an electric chassis dynamometer and a synchronized mini-computer generated command signal, provides consistent and smooth driving of development vehicles on EPA emission runs. The electronic controller provides the necessary signals to actuate the throttle servo to power the engine, and to generate braking torque on the chassis rolls of the electric dynamometer. The servo gain and compensation circuits allow accurate and stable operation over a wide range of engine loads, transmission gear ratios, and car speeds. A single gain-compensation network is sufficient for vehicles used in AC's catalytic converter development program. Safety shutdown circuits and ease of installation are provided in the design.
Citation: Levijoki, A., Ayres, J., Yu, R., and Hammel, M., "A Servo Vehicle Driver for EPA Emission Tests," SAE Technical Paper 730532, 1973, https://doi.org/10.4271/730532. Download Citation
Author(s):
A. Levijoki, J. Ayres, R. Yu, M. Hammel
Affiliated:
AC Spark Plug Div., General Motors Corp.
Pages: 7
Event:
National Automobile Engineering Meeting
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Transmission gears
Catalytic converters
Vehicle drivers
Brake torque
Environmental protection
Throttles
Emissions
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