The fuel injector where the pressure vibration is decreased inside the return rail

摘要

The fuel injector for the internal combustion engine (1), the said fuel injector, in order to inject the fuel to the combustion chamber of the system has one injector at least, the said injector has, the high pressure terminal area (10), the said high pressure terminal area (10) through, it is designed in such a way that the fuel under high pressure is supplied to the injector, the control valve in order to control the injection of the injector (64) we to have, the low pressure terminal area of the injector in order to guide the control flow which it occurs when controlling the injection (12) to be provided, a leak pipe conduitWhen (11) we have, the said leak pipe conduit (11) is connected, the pressure retention valve (15) lying between, the fuel return current pipe conduit (17) with, the said pressure retention valve (15), exceeds specified pressure, the pressure retention valve (15) to side, in those of the type which has reached the point where it opens facing toward the fuel return current pipe conduit, in order to be able to weaken the reflection of the pressure wave where the beam limiting device (20) is provided, in open state of the pressure retention valve, arrives from the injector as a vacuum wave, the beam limiting device (20) being formedIt is. The vacuum wave which is advanced from the pressure retention valve facing toward a leak terminal area of the injector is decreased, or is controlled. It is possible to decrease the damage risk due to cavitation with this.