1987-11-01

A High Efficient Dynamic Short Test for Vehicle Emissions 872099

During the past decades the public acceptance of the actual environmental legislation has gradually turned into an active support of the same.Test methods have anyhow become more cost heavy and time consuming, underlining the need of simplified tests with reasonable correlation to the legal methods.Generally, the emissions under static and semistatic load conditions are gradually eliminated, why the heavy pollution now comes from transient periods of the driving pattern. Consequently a transient test procedure must satisfy the quality requirements on a short test applicable to vehicles from cars to heavy trucks and busses.The INertia COLLection system described here is developed to enable low cost and well repeatable measurements of the emission characteristics of engine systems in light and heavy vehicles under transient load. The system is easy to adopt and does not need any chassis dynamometer. Results from various tests on car families, on catalytic converter efficiencies and on truck diesel engines are described.

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