Patent ID: 6367709
Filing Date: 2002-04-09
Classification: F02M

Abstract:
A fuel injection valve comprising a valve member (14) that opens inward counter to an outflow direction of a fuel, said valve member has a sealing face (12) that mates with a valve seat (10), said valve controls an injection opening (9) which connects with a pressure chamber (7) situated upstream of said valve seat (10) said pressure chamber continuously communicates with a high-pressure fuel source (1) and is bordered by a pressure shoulder (18) on a first end of an enlarged diameter portion (15) of the valve member (14), the pressure shoulder (18) is subjected to a pressure in the pressure chamber (7) resulting in an opening force that acts on the pressure shoulder of the valve member (14), the valve member (14) has an actuating part (15a) that has a pressure face (26) on a second end of said valve member which is subjected to a control pressure in a control pressure chamber (23), said control pressure produces a closing force that acts on the pressure face (26) on the second end of the valve member (14) in a closing direction counter to the opening force, further comprising a pressure control means for controlling the pressure in said control pressure chamber (23) between a working pressure and a relief pressure, the valve member has a compensation pressure face (21) opposite to the pressure shoulder (18) and borders a closed hydraulic chamber (20) on one end, another end of the hydraulic chamber (20) is bordered by a first piston face (36) of a piston (33), the piston (33) has a second piston face (38) which is disposed remote from the first piston face (36) and is acted on by a constant reference pressure.