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Adaptation of Conventional Common Rail Type Diesel Injection System to DME Fuel
Published May 20, 2009 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
The purpose of this work is to verify the DME adaptability of suction control type high pressure pump which is used in a mass-produced common rail type diesel injection system, and introduce some DME adaptation results of the high pressure fuel system components. Firstly, it was verified that the suction of DME into the plunger room of the high pressure pump could be well performed by 'suction control type' even if fuel temperature of the plunger room were higher than that of the low pressure fuel supply system because 'suction control type' has an adiabatic expansion process for the liquefied gas such as DME in the initial stage of the plunger's downward stroke. Secondly, it was confirmed that the optimization of the high pressure fuel system components such as rail volume, rail outlet orifice diameter and high pressure pipe inner diameter provided the stable injection in an injection pressure range from 25 MPa to 100 MPa due to the decrease of pressure fluctuation in the high pressure pipe.
- Tadanori Yanai - National Traffic Safety and Environment Laboratory
- Atsuhiro Kawamura - National Traffic Safety and Environment Laboratory
- Yoshio Sato - National Traffic Safety and Environment Laboratory
- Hiroshi Oikawa - National Traffic Safety and Environment Laboratory
- Shinya Nozaki - Bosch
- Toshifumi Noda - Bosch
- Teruaki Ishikawa - Bosch
- Masashi Kasaya - Bosch