This report discusses the potential effectiveness of Inspection and Maintenance (I/M) programs at reducing carbon monoxide (CO) emissions from vehicles operated at cold temperatures. Four vehicles were deliberately maladjusted and tuned up to simulate the effects of an Inspection and Maintenance program on vehicles needing emission-related repairs. The results indicate that reductions in carbon monoxide emissions occurred when vehicles with maladjusted idle mixture and disconnected choke assist were tuned up. Inasmuch as this test program was limited to four vehicles, the conclusions should be viewed as preliminary. However the results indicate that Inspection and Maintenance, has the potential for reducing carbon monoxide emissions from in-use vehicles operated at temperatures below 75F.


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    Title :

    Emission effects of inspection and maintenance at cold temperatures


    Additional title:

    Einfluss von Wartung auf die Abgasemission von Kraftfahrzeugen bei niedrigen Temperaturen


    Contributors:

    Published in:

    Publication date :

    1982


    Size :

    35 Seiten


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English






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