An investigation of transient A/F characteristics was conducted using a 1.6 liter engine equipped with a Sequential Electronic Fuel Injection (SEFI) system. The engine was tested on a dynamometer facility capable of providing environmental temperatures as low as 10°F. A test procedure was developed to determine the effects of steady state A/F, engine speed, size of throttle ramp, injection timing, and hardware changes, on the transient A/F characteristics while the engine warmed up. It was found that, under cold operating conditions, the A/F excursions for the SEFI system were similar to those previously measured for a Central Fuel Injection (CFI) system on the same engine. It was also found that the sensitivity of the A/F excursions to variations in the test parameters, while quite dramatic at reduced temperatures, decreased as the engine warmed up.


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    Title :

    Transient A/F Characteristics for Cold Operation of a 1.6 Liter Engine with Sequential Fuel Injection


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1988



    Publication date :

    1988-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English