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Premixed Diesel Combustion and Emissions Characteristics Controlled by a Variable Valve Timing Mechanism~Study of Combustion Conditions Achieving Simultaneous Reduction of NOx and Smoke
Published September 28, 2005 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
Premixed diesel combustion and emissions were controlled at medium speed and load by using a variable valve timing (VVT) mechanism in a light-duty diesel engine. Combustion conditions satisfying simultaneous reduction of NOx and smoke were experimentally verified. The effects of premixing time, excess air ratio, ambient density at fuel injection and combustion temperature were investigated on NOx and smoke characteristics. The oxygen concentration of the intake gas was a dominant factor for low NOx combustion. Prolonging the premixing time under high excess air ratio and ambient density under high combustion temperature has a significant potential for reducing smoke.
- Daisuke Kawano - National Traffic Safety and Environment Laboratory
- Hisakazu Suzuki - National Traffic Safety and Environment Laboratory
- Hajime Ishii - National Traffic Safety and Environment Laboratory
- Yuichi Goto - National Traffic Safety and Environment Laboratory
- Yutaka Murata - Waseda Univ.
- Shigetomo Sawamoto - Waseda Univ.
- Jin Kusaka - Waseda Univ.
- Yasuhiro Daisho - Waseda Univ.
- Matsuo Odaka - Waseda Univ.