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Development and Engine Bench Testing of a Common Rail Type DME Injection System
Published October 22, 2008 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
A new concept common rail type DME injection system has been developed and operated in an engine test bench. This system's key components as high pressure pump and injector were modified optimally for DME from base common rail system. The high pressure pump used a suction control fuel metering type as other pre-stroke type. The system can be possible to inject DME highest pressure at 100 MPa for improvement of engine performance at high speed and load condition. The engine's maximum power could be performed to the developed jerk type DME injection engine's maximum power enough. The brake specific fuel consumption at highest speed and load was improved by 3% from a previously tested jerk type DME injection system. Emissions of CO and THC were also improved by 18% and 83% at this load condition while keeping a constant level of NOx emission at around 5 g/kWh.
- Tadanori Yanai - National Traffic Safety and Environment Laboratory
- Yoshio Sato - National Traffic Safety and Environment Laboratory
- Atsuhiro Kawamura - National Traffic Safety and Environment Laboratory
- Hiroshi Oikawa - National Traffic Safety and Environment Laboratory
- Shinya Nozaki - Bosch
- Toshifumi Noda - Bosch
- Teruaki Ishikawa - Bosch