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Effect of Optimized Injection and Ignition on Reducing NOx Emissions and Improving Thermal Efficiency in High Pressure Direct Injection Hydrogen SI Engines
Technical Paper
2009-08-0481
Sector:
Event:
JSAE Autumn Conference
Language:
Japanese
Abstract
A direct cylinder injection system is expected as a fueling system in hydrogen-fueled S.I. engines since it has a potentiality to mitigate decrease in output power which is disadvantageous nature of gas fuel engines. Technology to reduce fairly high NOx emissions level that is characteristic of direct injection SI hydrogen engines, however, is still underway of development. In this study new concept of optimizing combination of injection, ignition and combustion based on an application of high pressure injection up to 20 MPa, which enables notable reduction in NOx emissions without any tradeoffs on decrease in output power and thermal efficiency is introduced in direct injection S.I. engines.
Authors
- Atsuhiro Kawamura - National Traffic Safety and Environment Laboratory
- Tadanori Yanai - National Traffic Safety and Environment Laboratory
- Yoshio Sato - National Traffic Safety and Environment Laboratory
- Toru Honda - Tokyo City Univ.
- Yusuke Ogasawara - Tokyo City Univ.
- Kaname Naganuma - Tokyo City Univ.
- Kimitaka Yamane - Tokyo City Univ.
- Yasuo Takagi - Tokyo City Univ.