| 摘要 |
A fuel injection valve for injecting fuel pumped from a fuel injection pump into a combustion chamber of an internal combustion engine, comprises a valve housing with a fuel inlet and fuel injection openings, a nozzle attached to the valve housing, a first fuel passage for communicating the injection openings with the fuel inlet, a first slidable needle valve element, a first spring for urging the first needle valve element so as to close the first fuel passage, a pin disposed for providing an axial gap between the first needle valve element and itself, a second spring for uring the pin towards the first needle valve element, back pressure chambers for surrounding one end portion of the first needle valve element, a second fuel passage for communicating the back pressure chambers with the fuel inlet, an ON-OFF valve for opening or closing the second fuel passage, and an orifice disposed in a bypass passage bypassing the ON-OFF valve.
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