A study was conducted to determine the effects of vehicle maintenance practices on exhaust emissions. Four groups of 144 1968 to 1974 light duty vehicles, representative of California's population in 1975 were evaluated. The groups represented (1) a control group, (2) a 50% pass-fail idle test inspection, (3) manufacturers specification and (4) mandatory maintenance and parameter inspection. All vehicles entering the test program received a baseline 1973 Federal CVS emission test, followed by a hot-idle test (low and 2,500 rpm). Adjustment or repair of vehicles was accomplished by Olson Laboratories for Group II and Group III vehicles. Class A garages performed maintenance on Group IV vehicles. Following the necessary maintenance, the Federal and idle tests were repeated for Group II, Group III, and Group IV vehicles. All vehicles in these groups were retested at 1- 2- 6- 9- and 12-month intervals. This report documents the results of the test program.


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    Title :

    Degradation Effects on Motor Vehicle Exhaust Emission


    Contributors:

    Publication date :

    1976


    Size :

    228 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Degradation effects on motor vehicle exhaust emission

    Gunderson,J.A. / Resnick,L. / Olson Lab.,US et al. | Automotive engineering | 1976


    Degradation Effects on Motor Vehicle Exhaust Emission

    Gunderson, J. A. / Resnick, L. | SAE Technical Papers | 1976



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