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A STUDY OF TWO-PHASE INJECTOR PERFORMANCE FOR DIRECT-INJECTION STRATIFIED-CHARGE ENGINES

Yong-Pyo Lee, Sungsoo Kim, Sangmin Choi

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Abstract

The application of direct-injection stratified-charge (DISC) engines has been limited by the unsatisfactory atomization performance of existing fuel injectors, although it has great possibilities for improved fuel economy and low emissions through lean combustion. A two-phase injector for DISC engines was developed, which produced a good-quality spray. Injector performance was checked to investigate the spray structure and the optimal conditions in terms of design variables and operating parameters. This air-assisted injector exhibited stable behavior at speeds up to 6000 rpm and produced a finely atomized spray of 14.9 μm in Sauter mean diameter.

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What this paper is about

The application of direct-injection stratified-charge (DISC) engines has been limited by the unsatisfactory atomization performance of existing fuel injectors, although it has great possibilities for improved fuel economy and low emissions through lean combustion. A two-phase injector for DISC engines was developed, which produced a good-quality spray. Injector performance was checked to investigate the spray structure and the optimal conditions in terms of design variables and operating parameters. This air-assisted injector exhibited stable behavior at speeds up to 6000 rpm and produced a finely atomized spray of 14.9 μm in Sauter mean diameter.

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Available abstract

The application of direct-injection stratified-charge (DISC) engines has been limited by the unsatisfactory atomization performance of existing fuel injectors, although it has great possibilities for improved fuel economy and low emissions through lean combustion. A two-phase injector for DISC engines was developed, which produced a good-quality spray. Injector performance was checked to investigate the spray structure and the optimal conditions in terms of design variables and operating parameters. This air-assisted injector exhibited stable behavior at speeds up to 6000 rpm and produced a finely atomized spray of 14.9 μm in Sauter mean diameter.

Key concepts: Injector, Sauter mean diameter, Spray characteristics, Fuel injection, Combustion, Materials science, Automotive engineering, Nuclear engineering

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A STUDY OF TWO-PHASE INJECTOR PERFORMANCE FOR DIRECT-INJECTION STRATIFIED-CHARGE ENGINES — Research Paper | ScholarLens