Fuel economy and drivability have deteriorated as a result of engine changes made to reduce exhaust emissions in recent-model cars. To study this problem, chassis dynamometer tests were run with 1970 and 1972 cars using both cold-start and hot-start procedures. Fuel economy and drivability were evaluated during the first 2 miles and the last 3 miles of a 50°F cold-start driving cycle similar to the Coordinating Research Council road test. Fuel economy was also evaluated under warmed-up conditions at 72°F using the last half of the cold-start cycle. The effects of car year model, gasoline volatility, gasoline heat content, and car warmup are discussed in this paper.


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    Title :

    Fuel Economy and Cold-Start Drivability with Some Recent-Model Cars


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Fleet Week ; 1974



    Publication date :

    1974-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





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