Patent ID: 6994273

Claim:
A fuel injection valve for intermittent fuel injection into a combustion chamber of an internal combustion engine, comprising an elongate tubular housing ( 2 ) defining upper and lower ends and having a valve seat ( 16 ) mounted at the lower end and which includes at least one injection opening formed therein, and with said housing including a high pressure inlet ( 8 ) which opens to a high pressure chamber ( 9 ) within the housing, an injection valve member ( 10 ) mounted for axial movement within the housing between a lowered position closing the one injection opening and a raised position wherein the one injection opening is open and communicates with the high pressure chamber in the housing, said injection valve member including a control piston ( 18 ) formed at the end thereof opposite the valve seat, with the control piston having an upper end face which defines a lower side of a control chamber ( 20 ) within the housing, a closing spring ( 17 ) for biasing the injection valve element toward its lowered position, a control element ( 22 ) mounted within the housing adjacent the upper end thereof, with said control element having a control passage ( 25 ) which extends axially therethrough from an upper end side to its opposite lower end side, and with the opposite lower end side communicating with the control chamber, a pilot valve ( 5 ) for the controlled closing and opening of the control passage at the upper end side of the control element, an adjustable valve element ( 21 , 41 , 46 ) mounted adjacent the lower end side of the control element and which, in a closed position, bears against the lower end side of the control element, with said adjustable valve element including a throttle passage ( 26 , 42 , 47 ) through which the control chamber communicates with the control passage of the control element, and a throttle inlet ( 33 ) connected between the high pressure chamber in the housing and the control chamber, with the outlet of the throttle inlet being positioned so as to communicate with the control chamber without passing through an intermediate throttle point.