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Characteristics of Low NOx Formation of Over-Rich-Mixture Plume Combustion in High Pressure Direct Injection SI Hydrogen Engines
Published May 19, 2010 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
The research investigates more detail of characteristics of combustion process and NOx emissions and predicts mixture formation process in new combustion concept called "PCC (Plume Combustion Concept)" which achieved low NOx emissions even in high load operating conditions in direct injection SI hydrogen engines. The results indicated that combustion of rich mixture plume that is ignited just after the end of injection reduced NOx emission more than 70 percent compared with another combination of injection and ignition timing such as more advanced injection timing aiming to form uniform mixture and other without showing any tradeoffs with thermal efficiency and unburned fuels. This combustion concept is featured by characteristics of hydrogen fuels which show high diffusivity and high burning velocity.
- Atsuhiro Kawamura - National Traffic Safety and Environment Laboratory
- Yoshio Sato - National Traffic Safety and Environment Laboratory
- Yusuke Ogasawara - Tokyo City Univ.
- Toru Honda - Tokyo City Univ.
- Masakuni Oikawa - Tokyo City Univ.
- Kaname Naganuma - Tokyo City Univ.
- Kimitaka Yamane - Tokyo City Univ.
- Yasuo Takagi - Tokyo City Univ.