Experimental Characterization of Flat-Spray Injector for Gasoline Direct-Injection Engines
A flat spray pattern was proposed in order to improve conventional stratified-charge combustion systems in a direct-injection (DI) gasoline engine. Swirl injectors with a V-groove nozzle and a rectangular-groove nozzle were newly designed. The characteristics of newly designed injector nozzles were...
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Published in | Nihon Kikai Gakkai rombunshuu. B hen Vol. 16; no. 9; pp. 2433 - 2440 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | Japanese |
Published |
01.09.2004
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Online Access | Get full text |
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Summary: | A flat spray pattern was proposed in order to improve conventional stratified-charge combustion systems in a direct-injection (DI) gasoline engine. Swirl injectors with a V-groove nozzle and a rectangular-groove nozzle were newly designed. The characteristics of newly designed injector nozzles were examined experimentally under various ambient pressure and fuel pressure conditions. The fuel spray characteristics were tested in a pressure chamber. The injected fuel-spray was illuminated by a YAG-laser sheet and their images were captured by CCD cameras. The atomization of fuel spray in the V-groove and U-groove nozzle was also investigated experimentally. It was shown that the V-groove and the U-groove nozzles generate a well-atomized flat fuel-spray pattern that can be controlled by adjusting the groove-depth. It was also shown that the flat fuel-spray pattern was not susceptible to ambient pressure variations. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 content type line 23 ObjectType-Feature-1 |
ISSN: | 0387-5016 |