Experimental Research on Rapid Combustion in HCCI Engines

Abstract

HCCI engines have attracted widespread attention as high-efficiency and low-pollution combustion systems. The authors have conducted experiments to visualize rapid combustion in the cylinder accompanied by cylinder pressure oscillations and have also investigated the factors influencing rapid combustion in HCCI engines. The results have shown that in combustion accompanied by cylinder pressure oscillations a highly brilliant flame occurs simultaneously over a wide area of the combustion chamber almost instantaneously. It has also been found that the rapidity of HCCI combustion is influenced by the ignition timing and the quantity of heat produced per cycle by the injected fuel.