Abstract In an engine fuel injection apparatus including an injector having a fuel injection valve for injecting fuel and an air fuel injection valve that is mounted to a cylinder head so as to inject fuel directly into a combustion chamber with compressed air an increase in the size of the engine and the complexity of the structure around the engine are avoided and the pumping efficiency of a compressed air pump is improved. At least part of the compressed air supply route for supplying compressed air to the injector is provided directly in the cylinder head while passing the area in the vicinity of an exhaust port.
United States Patent Application 20040065295 Kind Code A1 Hanawa, Kaoru ; et al. April 8, 2004
Abstract An air fuel injection engine including an injector composed of a fuel injection valve for injecting fuel and an air fuel injection valve for directly injecting fuel together with compressed air into a combustion chamber and an injector housing for holding and securing the injector to an engine body. The injector is supported on a head cover, and at least part of a compressed air supply passage for supplying compressed air to the injector is provided directly in the head cover. Further, an injector housing is formed integrally with a head cover which forms part of an engine body. With this configuration, the scale of the engine, the complication of the structure around the engine, and the number of part required can be kept to a minimum.
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