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Effect of EGR on stratified charge combustion in direct injection SI gasoline engine by using Raman scattering method
Published October 23, 2001 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
Raman scattering method has been developed for the cycle-by- cycle simultaneous measurement of HC, O2, H20, N2 for Toyota D-4 gasoline engine with EGR operation. By using the Raman scattering method, the effect of EGR on stratified charge combustion is investigated in a direct injection SI gasoline engine. The results show that (1) at the compression stroke homogeneous EGR gas exist, (2) component fluctuation (qualitative fluctuation) of EGR introduced by the previous combustion is more dominant for EGR fluctuation than quantitative fluctuation of EGR, (3) at the usual operating condition EGR fluctuation doesn't influence the combustion.