Exhaust Gas Device Testing-Road or Chassis Dynamometer? 620400

Sixteen vehicles, representing four different power-to-weight ratios, were tested over the California Motor Vehicle Pollution Control Board exhaust device evaluation cycle on the road and chassis dynamometer. Data are presented comparing the engine intake air consumption and the sensible heat output for both test methods.
These data indicate that the cycle, as conducted on the road, requires more intake air and rejects more exhaust heat than does dynamometer operation. The difference in exhaust heat content for dynamometer operation, as compared to road operation, increases as the power-to-weight ratio increases.
Increased horsepower settings for dynamometer testing are evaluated. With increased horsepower requirements it is possible to provide equivalent engine air consumption and exhaust heat approximately equal to road operation.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.