Patent ID: 11933257
Assignee: CATERPILLAR INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A fuel injection system, comprising:
a fuel supply passage configured to receive a pressurized fuel;
a nozzle orifice downstream of the fuel supply passage;
a control chamber configured to receive pressurized fuel;
an injection valve configured to move when the pressurized fuel is drained from the control chamber to open the nozzle orifice, and configured to close the nozzle orifice when the pressurized fuel is present in the control chamber,
the injection valve having an expanded configuration in which a portion of the injection valve moves proximally away from a distal end of the injection valve,
the expanded configuration being associated with a first lift, and a contracted configuration being associated with a second lift, the first lift being different than the second lift; and
a lift control valve that is actuated by fuel and that is connected to a fuel supply in a manner that supplies fuel to the lift control valve separate from fuel supplied to the control chamber and configured to cause the injection valve to change from a first length associated with a first pressure of the fuel to a second length associated with a second pressure of the fuel that is greater than the first pressure.