COMBUSTION-chamber deposits are the primary cause of preignition. This preignition may be silent or it may be manifested by a variety of engine noises ranging from light pings to violent explosions.Its occurrence, according to these authors, is favored by changes in engine operating conditions that result in the development of higher pressures and temperatures during compression, or that cause an increase in the concentration of oxygen available to support the combustion of carbonaceous material.Thus, increased compression ratio, supercharging, operation with retarded spark timing, and the combustion of lean mixtures are likely to increase the tendency for the occurrence of preignition.Some hydrocarbons have a greater tendency to be ignited by hot deposit particles than others. Preflame reactions of the fuel tend to sensitize it to ignition. Under certain conditions, the effect of these preflame reactions can be minimized by tetraethyl lead.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    An Investigation of Preignition in Engines


    Additional title:

    Sae Technical Papers


    Contributors:
    Melby, A.O. (author) / Sturgis, B.M. (author) / Diggs, D.R. (author)

    Conference:

    Pre-1964 SAE Technical Papers ; 1906



    Publication date :

    1954-01-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Investigation of preignition in engines

    Melby, A.O. / Diggs, D.R. / Sturgis, B.M. | Engineering Index Backfile | 1953


    PREIGNITION IN AIRCRAFT RECIPROCATING ENGINES

    Anderson, J. | SAE Technical Papers | 1957


    Preignition indicator for aircraft engines

    Dallas, T. / Hoss, G. / Harries, M.L. | Engineering Index Backfile | 1945


    A preignition indicator for aircraft engines

    Dallas, Thomas / Hoss, Gene / Harries, Myron L. | TIBKAT | 1945


    A Preignition Indicator for Aircraft Engines

    Harries, Myron L | NTRS | 1945