A quite interesting self-excited oscillation phenomenon in engine speed, which may not be explained with the classical theory of mechanical hunting, is studied experimentally. The effects of the various engine operating variables on the phenomenon are examined using a four cycle single cylinder gasoline engine with an inertia governor. It was found that the phenomenon occurs when engines are operated at a lean air fuel ratio under light load conditions, and that the hunting phenomenon is ascrlbable to the temporary shift in air fuel ratio from the steady state value. This shift in air fuel ratio occurs due to the fuel flow delay into the cylinder caused by the fact that the fuel flow into the cylinder cannot follow the movement of the throttle valve.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    The Lean Hunting Phenomenon in Gasoline Engines


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    1987 SAE International Off-Highway and Powerplant Congress and Exposition ; 1987



    Publication date :

    1987-09-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    The lean hunting phenomenon in gasoline engines

    Tanaka,M. / Mochizuki,S. / Nishiwaki,N. et al. | Automotive engineering | 1987


    The Lean Hunting Phenomenon in Gasoline Engines - part 2

    Yae, Kazuo / Tanaka, Munenobu / Nishiwaki, Nobuhiko et al. | SAE Technical Papers | 1988


    The lean hunting phenomenon in gasoline engines - part 2

    Tanaka,M. / Yae,K. / Mochizuki,S. et al. | Automotive engineering | 1988


    A simulation of lean hunting in gasoline engines

    Watanabe,Y. / Tanaka,M. / Kyushu Tokai Univ.,JP | Automotive engineering | 1991


    A Simulation of Lean Hunting in Gasoline Engines

    Tanaka, Munenobu / Watanabe, Yoshinori | SAE Technical Papers | 1991