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The Virtual Vehicle Engine Dynamometer System for the Catalyst Investigation
Published October 27, 2004 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
The Japanese government has announced that the micro transient modal test, for emission standard, will be introduced in 2008. In 1997, we developed a virtual vehicle system for evaluating modal emissions, using an engine dynamometer without a real vehicle, and this time we have improved the system for micro transient mode. The new system is composed of a vehicle simulator, a lightweight inertial dynamometer and highly precise gas analyzers. The vehicle simulator communicates directly to the electronic engine control unit to simulate the various driving cycles. The dynamometer is in low moment of inertia ( 0.09 kg•m2), and the gas analyzers can measure the concentration of exhaust gas which is cleaner than the ambient atmosphere. The system is utilized for the development of catalyst that has quick response to the micro transient mode.