ACCUMULATOR FUEL INJECTION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an accumulator fuel injection device capable of reducing pressure pulsation of a return pipe connected to an injector and capable of restraining deviation in oil quantity injected from the respective injectors. SOLUTION: This accumulator fuel supply device is provided with plural injectors 4 for injecting high pressure fuel stored in a common rail 3 to a cylinder of an internal combustion engine. The pressure in a back pressure control chamber is controlled in order to control injection of the injector 4. The fuel oil leaked from the back pressure control chamber is returned to a fuel tank 1 through the return pipe 8 connected to the injector 4. An orifice 56 for throttling a passage area is provided on a downstream side part than a part wherein the fuel oil leaked from the plural injectors 4 joins. The orifice may be provided between the injectors of the return pipe. The different injectors of which injection time is different may be connected to different pipe passages. The return pipe may be constituted by a soft tube.