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U.S. Department of Energy
Office of Scientific and Technical Information

MOBILE4 exhaust emission factors and inspection/maintenance benefits for passenger cars. Technical report

Technical Report ·
OSTI ID:5134804

The MOBILE4 Tech IV Credit Model is used to estimate the emission factor equations, the effects of Inspection and Maintenance (I/M) programs, and the bag fraction equations for 1981 and later passenger cars. The model's results are then stored in the EPA MOBILE4 emission factor model data base. The report describes the development, use, and results of the Tech IV model. It also documents the normalized bag fractions, high-altitude emission factors, biennial I/M credits, and idle-emission I/M credits used in MOBILE4.

Research Organization:
Environmental Protection Agency, Ann Arbor, MI (USA). Technical Support Staff
OSTI ID:
5134804
Report Number(s):
PB-90-120148/XAB; EPA/AA/TSS/IM--89/3
Country of Publication:
United States
Language:
English