Patent ID: 6247453
Filing Date: 2001-06-19
Classification: F02M

Abstract:
A fuel injection valve for internal combustion engines, comprising a valve member (50) which is axially displaceable in a bore (40) of a valve body (10) and which on an end toward the combustion chamber said valve body has a valve member head (52), said head forming a valve closing member, which on a side toward the valve body (10) has a sealing face (53), with which the head cooperates with a valve seat face (11) provided on the face end of the valve body (10) toward the combustion chamber, injection openings in the valve member head (52), which emerge from a pressure chamber (12), formed between the valve member (50) and a wall of the bore (40), the injection opening lead away along the circumferential wall of the valve member head (52), the injection openings being closed by the wall of the bore (40) when the valve member (50) is resting on the valve seat (11) and the injection opening are opened by an outward-oriented opening stroke motion of the valve member (50), the valve member is actuatable by an externally controllable actuator independently of a high fuel pressure in the pressure chamber (12), and two pressure shoulders (54, 55), facing one another and axially defining the pressure chamber, are provided on the needle-like valve member (50) and each shoulder has a substantially equal pressure engagement surface area, one of the pressure shoulders (55) is disposed on an end of the valve body (10) remote from the combustion chamber, in a compensation chamber (80) which communicates fluidically with the pressure chamber (12) and is closed off on a face end by an axially displaceably guided pressure sleeve (70).