NEEDLE NOZZLE TYPE FUEL INJECTION VALVE

摘要

PURPOSE: A fuel injection valve for a diesel engine is provided to prevent incomplete combustion carbide from being accumulated around a fuel injection port by preventing a fuel leak. CONSTITUTION: A fuel injection valve for a diesel engine comprises a valve body(10), a control bolt(11), a nozzle body(12), a first elastic member(13), a main needle(14), a second elastic member(15), and a sub needle(16). The valve body is connected to upper and lower hollows(101,102) through a hollow connection hole(100) and has a fuel inlet port(103). A fuel inlet(121c) of the nozzle body is connected to the fuel inlet port of the valve body. The first elastic member is supported by a first support sheet(130a). The main needle has multiple fuel feeding holes(142). The second elastic member is supported by a second support sheet. The sub needle supports the bottom surface of the first support sheet.