The vehicle chassis dynamometer recently selected by the EPA for its own research and testing programs is described. The design provides accurate electrical inertia and road-load simulation through a wide power range and eliminates the need for warm-up. The principal innovative features of this dynamometer are the central placement of an AC flux-vector power exchange unit (PEU) between the rolls of a single 48-inch diameter roll-set, the friction-compensated motorized roll bearings, and the unitary cast-iron frame. The dynamometer controller employs a feedforward algorithm that delivers an unusually rapid response to a step-change in load command. It employs two computers to carry out its control functions, to provide the operator with real-time test monitoring, and to perform a variety of automatic functions. The worldwide escalation of vehicle emission standards has led dynamometer engineers to develop increasingly sophisticated road simulation instrumentation. The chassis dynamometer chosen by the US Environmental Protection Agency for its standards development program is a prime example of this sophistication. The purpose of this paper is to describe the design and principal features of the dynamometer. It incorporates several new ideas which make it both similar to operate and more accurate than conventional designs.
Large-roll chassis dynamometer with AC flux-vector PEU and friction-compensated bearings
Dynamometer mit großen Rollen zur Prüfung von Fahrgestellen, ausgestattet mit einem Wechselstrom-Vectorenfluß-Leistungstauscher und reibungskompensierten Rollenlagern
SAE Technical Papers ; 1-13
1993
13 Seiten, 10 Bilder, 1 Tabelle, 4 Quellen
Conference paper
English
Kraftfahrzeugbau , Fahrgestell , Fahrzeugmotor , Prüfstand , Bauweise , Bauelement , Wechselstrom , Magnetfeld , Rollenlager , Reibungsfreiheit , Versuchsdurchführung , Simulationsmodell , Straßenfahrdynamik , Fahrzeugerprobung , Echtzeitbetrieb , Umweltschutz , Emissionsminderung , Entwurfsparameter , Auslegung (Dimension) , Prozessoptimierung
Large-roll chassis dynamometer with AC flux-vector PEU and friction-compensated bearings
Automotive engineering | 1993
|Large-Roll Chassis Dynamometer with AC Flux-Vector PEU and Friction-Compensated Bearings
SAE Technical Papers | 1993
|SAE Technical Papers | 1993
|Automotive engineering | 1993
|