Patent ID: 11885290
Assignee: CATERPILLAR INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 9:
10. A fuel injector comprising:
a nozzle case defining a longitudinal axis, and having spray orifices formed therein arranged in a first orifice set and a second orifice set;
spray ducts coupled to the nozzle case and in spray path alignment with the first orifice set;
an outer check positioned within the nozzle case and having transfer passages formed therein arranged in a first passage set and a second passage set, and the outer check is rotatable about the longitudinal axis relative to the nozzle case;
an inner check positioned within the outer check and movable relative to the outer check between a retracted position and an advanced position;
a fuel volume formed between the outer check and the inner check, and at the retracted position the transfer passages are fluidly connected to the fuel volume, and at the advanced position the inner check is in contact with the outer check and blocks the transfer passages from the fuel volume;
the spray orifices and the transfer passages together define a first angular alignment pattern where the outer check is at a first angular orientation about the longitudinal axis and the first orifice set is fluidly connected to the first passage set;
the spray orifices and the transfer passages together define a second angular alignment pattern where the outer check is rotated from the first angular orientation to a second angular orientation and the second orifice set is fluidly connected to the second passage set; and
a second fuel volume formed between the nozzle case and the outer check, and the outer check is movable relative to the nozzle case between a retracted position where the spray orifices are fluidly connected to the second fuel volume, and an advanced position where the outer check is in contact with the nozzle case and the spray orifices are blocked from the second fuel volume.