| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high-temperature fluid injection valve and a high-temperature water injection internal combustion engine, which suppress a heat deformation of a sliding portion between a needle valve and a needle valve aperture, and an abutting part between the needle valve and a valve seat, prevent a deterioration in injection performance and sheet troubles of the needle valve due to the heat deformation, and prevent the sliding troubles in the sliding portion and a burning of the sliding portion to ease a processing of the needle valve and the valve seat and improve a processing accuracy. <P>SOLUTION: The high-temperature fluid injection valve has a constitution that a high-temperature fluid is guided into a needle valve chamber, and an attachment and detachment of the valve seat and a sheet portion of the needle valve driven by a needle valve opening and closing means open and close a flow path between the needle valve chamber and a jet hole of a nozzle tip to control the injection of the high-temperature fluid. The valve seat on which the sheet portion of the needle valve sits is formed on an upper surface side of the nozzle tip, and the needle valve aperture into which the needle valve is fitted reciprocatingly slidably is formed on a case member separated from the nozzle tip. <P>COPYRIGHT: (C)2007,JPO&INPIT |
