초록 ▼

A fuel injection system for internal combustion engines, which has a fuel injection pump and an additional device for varying the injection quantity pumped to the injection nozzle from a pump work chamber; the additional device has a blocking piston acted upon from the pump work chamber, the deflect

A fuel injection system for internal combustion engines, which has a fuel injection pump and an additional device for varying the injection quantity pumped to the injection nozzle from a pump work chamber; the additional device has a blocking piston acted upon from the pump work chamber, the deflection stroke of which is controlled by an electrically controlled valve by means of which the injection duration or the injection quantity can be controlled. The operative face on the blocking piston facing the pump work chamber is smaller than the face facing the control valve and the control valve is embodied as an ON/OFF valve.

대표청구항 ▼

A fuel injection system for internal combustion engines, which comprises, a first housing; an injection pump in said first housing for pumping fuel via at least one pressure line (8) to an injection nozzle from at least one pump work chamber (7) formed by a piston (4) in said first housing and an en

A fuel injection system for internal combustion engines, which comprises, a first housing; an injection pump in said first housing for pumping fuel via at least one pressure line (8) to an injection nozzle from at least one pump work chamber (7) formed by a piston (4) in said first housing and an end of a fitting (6) of a second housing (2); a metering device (13) for determining the injection quantity pumped from the pump work chamber to the injection nozzle; a blocking piston (18) in said second housing which by means of a first face (29, 32) delimits a storage chamber (22) that is always connected to said pump work chamber (7) via a passage that extends from said pump work chamber (7) to said storage chamber (22) and fuel flow to and from said storage chamber (22) is permitted only through said passage, said blocking piston being displaceable within said second housing from a stop, counter to a restoring force (19) by fuel delivered from the pump work chamber into said storage chamber (22), said first face (29, 32) of said blocking piston being operative counter to said restoring force and a second face (34) of said blocking piston delimiting a control chamber (23) and being operative in a restoring direction of said restoring force; a control line (24) of said control chamber (23) leads to a relief chamber (14) of lower pressure; and an electrically actuated control valve (3) in said control line (24); said control valve (3) is an ON/OFF through valve; and said first face (29, 32) on said blocking piston (18, 31, 33) is smaller than said second face (34).