Patent ID: 11959434
Assignee: CLEARFLAME ENGINES, INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 39:
40. A method of operating a compression ignition engine, the compression ignition engine including an engine cylinder having an inner surface, a head surface, a piston disposed and configured to move in the engine cylinder, an intake valve, and an exhaust valve, the inner surface of the engine cylinder, the piston, the head surface, the intake valve, and the exhaust valve defining a combustion chamber, the method comprising the steps of:
opening the intake valve to draw a volume of air into the combustion chamber;
applying a thermal management strategy to the volume of air;
closing the intake valve,
compressing the volume of air in the engine cylinder at a compression ratio of at least about 15:1 to a pressure and temperature sufficient to induce autoignition in the combustion chamber,
injecting a volume of fuel into the combustion chamber at an engine crank angle between about 330 degrees and about 365 degrees, the volume of fuel having a cetane number less than about 30;
changing the injection timing of the volume of fuel to control the rate of pressure rise from the combustion of the volume of fuel in the volume of air to be less than about 15 bar per degree of crank angle; and
igniting the volume of fuel,
wherein the thermal management strategy affects a temperature of the volume of air, such that a delay between initiation of injecting the volume of fuel into the combustion chamber and initiation of igniting the volume of fuel is less than about 1 ms.