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Effectiveness and issues of various measurement techniques used in evaluating spray characteristics in a direct-injection gasoline engine
Published July 13, 1999 by Society of Automotive Engineers of Japan in Japan
A direct-injection gasoline engine uses homogeneous charge and stratified charge combustion processes selectively depending on the operating conditions to achieve low fuel consumption and high output. When fuel is injected into the combustion chamber with a swirl injector, changes in ambient conditions, especially pressure, affect the hollow cone spray pattern, which in turn greatly influences air-fuel mixture formation and the combustion performance of the engine. In this study, various characteristics of the hollow cone spray were examined with the aim of making clear changes in the spray pattern under high back pressure.