초록 ▼

The invention relates to a fuel injector for injecting fuel into a combustion chamber, having a solenoid valve for controlling a mini-servo valve. A movable armature can be placed in a sealing fashion on a valve seat in a lower armature chamber, wherein in addition, the mini-servo valve is held in a

The invention relates to a fuel injector for injecting fuel into a combustion chamber, having a solenoid valve for controlling a mini-servo valve. A movable armature can be placed in a sealing fashion on a valve seat in a lower armature chamber, wherein in addition, the mini-servo valve is held in an injector body and seals a control line against a flat seat. By means of the flat seat, during an actuation of the solenoid valve, the control line can be relieved of pressure from a high fuel pressure to a return pressure into at least one return line. A mechanism for reducing pressure oscillations are provided in the at least one return line, which includes at least one diaphragm cell which is held in a recess and which is placed in fluidic connection with the at least one return bore. A fuel injector with the mechanism for reducing pressure oscillations is therefore created in the at least one return line which operates without a leakage flow and has a simple and effective function.

대표청구항 ▼

The invention claimed is: 1. A fuel injector for injecting fuel into a combustion chamber, having a magnet valve for controlling a miniature servo valve, the fuel injector comprising:a movable armature which sealingly closes a valve seat disposed in a armature chamber;the miniature servo valve being

The invention claimed is: 1. A fuel injector for injecting fuel into a combustion chamber, having a magnet valve for controlling a miniature servo valve, the fuel injector comprising:a movable armature which sealingly closes a valve seat disposed in a armature chamber;the miniature servo valve being received in an injector body, the servo valve sealing off a control line from a flat seat, and upon an actuation of the magnet valve, the control line can be relieved of a high fuel pressure to a return pressure by means of the flat seat, into at least one return line;at least one diaphragm cell which reduces pressure fluctuations in the at least one return line, said diaphragm cell being disposed in a recess that communicates fluidically with the at least one return line;wherein the diaphragm cell has two circular disk-like diaphragm shells, which are joined in pressuretight fashion to one another radially around in a joined circumference to form the diaphragm cell;wherein the recess is sealed off in pressuretight fashion by a closure element, and in the recess next to the diaphragm cell, there is a prestressing or receiving element, said prestressing or receiving element mechanically bracing the diaphragm cell against the closure element along the joined circumference of the diaphragm shells; andwherein each of the closure element and the prestressing or receiving element or injector body includes a centrally disposed stop element, which are capable of limiting bulging of the diaphragm shells.