An evaluation of restorative maintenance on exhaust emissions of 1975-1976 model year in-use automobiles

Technical Report · Thu Dec 01 04:00:00 EST 1977

OSTI ID:6491238

Bernard, J C; Pratt, J F

This report describes the results of an automobile exhaust emission testing program conducted by the U.S. Environmental Protection Agency. The purpose of the program was to go beyond EPA's basic surveillance testing to determine the reasons for the difference in emission levels between vehicles on the road and their pre-production counterparts in certification. A total of 300 vehicles were subjected to a series of tests before and after various stages of tune-up. The vehicles were low-mileage 1975 and 1976 models of the three major domestic manufacturers and were obtained from private owners. The testing was performed in three cities by independent laboratories under contractor to EPA. Significant findings include the confirmation of the relatively poor emission performance of newer vehicles, the wide extent of maladjustments and disablements and the large emission reductions possible upon correction of these problems. (Portions of this document are not fully legible)

• Research Organization: Calspan Corp., Buffalo, NY (USA)
• OSTI ID: 6491238
• Report Number(s): PB-284031
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330700* -- Advanced Propulsion Systems-- Emission Control
AIR POLLUTION CONTROL
AUTOMOBILES
EQUIPMENT
EXHAUST GASES
GASEOUS WASTES
PERFORMANCE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
VEHICLES
WASTES