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Development and Engine Bench Testing of a Common Rail Type DME Injection System (Second Report)~Required Injection Pressure on Full Load Condition
Published May 20, 2009 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
The purpose of this research is to find out necessary rail pressure at full load condition, and it set best common rail pressure for fuel consumption and injection timing. In this paper, investigation of influence of common rail pressure and injection pressure for fuel consumption at some engine speeds on full load condition were described. (1) From the experimental results, the necessary common rail pressure at 1000 rpm is 25 MPa, 1800 rpm is 40 MPa, and 3000 rpm is 100 MPa. (2) Brake specific fuel consumption of the common rail DME engine at full load condition was improved by 7% on low speed area and 9% on high speed area from the previously developed jerk type DME injection system equipped engine, and it could be achieved to the base diesel engine level. Moreover CO2 emission was reduced by 10% from the base diesel engine. Therefore, especially, necessary rail pressure of DME engine at the low speed and high load condition is relatively lower than rail pressure of common rail diesel engine on same condition.
- 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