Patent ID: 11939904
Assignee: CATERPILLAR INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 10:
11. A gaseous fuel engine system comprising:
an engine having a cylinder formed therein, and a piston within the cylinder;
a first fuel supply for the engine containing a gaseous hydrogen fuel;
a second fuel supply for the engine containing a gaseous hydrocarbon fuel;
an oil spray system including an oil sprayer jet oriented to spray oil onto the piston, an oil valve fluidly connected to the oil sprayer jet, and an oil spray control unit in control communication with the oil valve;
the oil spray control unit is structured to:
monitor an operating parameter of the engine to which a crown surface temperature of the piston is responsive;
determine an oil valve control signal based on a value of the monitored operating parameter; and
output the oil valve control signal to the oil valve to controllably spray oil onto the piston to maintain the crown surface temperature between a high temperature limit and a pre-ignition mitigation temperature limit.