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Stabilization of combustion on DME compression ignition engine with low-pressure fuel injection
Published October 23, 2001 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
In the research of DME compression ignition engine, there are a lot of reports on the high fuel pressure systems which use common-rail fuel injector and others for the DME mixture formation promotion. However, the initial cost on development of the DME engines is increased with these fuel supply systems. At the same time, there might happen the aggravation of reliability and durability of the DME engine due to the increase of Pmax by the high fuel pressure. On the other hand, it has been understood that DME combustion with the low fuel pressure using electronic controlled injector was not stabilized by defective mixture formation, though the excellent thermal efficiency was obtained at MBT.
In this paper, the stabilization of combustion on DME compression ignition engine with low-pressure fuel injection was investigated about the influence of the fuel pressure and the combustion assistance by homogeneous charge. As a result, it has been understood that the fuel mixture formation and the combustion are promoted due to the active contact between the fuel molecules and the oxygen molecules, because of the reinforcement of the fuel penetration and increase of the stir action.