| 摘要 |
The present invention provides an internal combustion engine system which uses a blended fuel of gasoline and ethanol, operates with high efficiency, and can inhibit nitrogen oxide and the like from being discharged. The internal combustion engine system comprises: a fuel tank 3 that accommodates a blended fuel having an octane number of 80 to 100, which has been prepared by blending gasoline having the octane number of 30 to 85 and ethanol into a weight ratio between 9:1 and 6:4; separating means 4 for adding water to the blended fuel to separate the blended fuel into the gasoline and an ethanol-water mixture liquid; reforming means 8 for reforming one part of the ethanol-water mixture liquid to produce a mixture liquid of diethyl ether and water; and fuel injectors 10 a, 10 b and 10 c which independently inject each of the gasoline, the ethanol-water mixture liquid and the mixture liquid of diethyl ether and water. The internal combustion engine system conducts spark ignition combustion when a load is high, and conducts homogeneous charge compression ignition combustion when the load is low.
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