一、前言 柴油机燃烧过程分发火延迟期、速燃期和缓燃期。随着转速的增高,发火延迟期增大。为了使速燃期能在上止点附近进行,使燃烧热有效地变成机械能,要求高转速时的供油提前角度比低速时的大。就是说,柴油机要在各个工况(不同转速、不同负荷)下都具有良好的动力性和经济性,其供油提前角应能自动调整在最佳位置。这对于变速、 I. Introduction Diesel combustion process distribution of fire delay, fast burning period and slow burning period. As the speed increases, the firing delay increases. In order to allow the quick-ignition period to be performed near the top dead center, the combustion heat is effectively converted to mechanical energy, and the fuel supply advance angle at a high rotational speed is required to be larger than at a low speed. In other words, the diesel engine in all conditions (different speeds, different loads) have good power and economy, the fuel supply advance angle should be able to automatically adjust the best position. This is for speed,