Patent ID: 11952954
Assignee: CLEARFLAME ENGINES, INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 10:
11. A method of operating a compression ignition engine, the method comprising:
drawing a volume of air into a combustion chamber;
moving a piston from a bottom-dead-center (BDC) position to a top-dead-center (TDC) position in the combustion chamber at a compression ratio of at least about 15:1;
injecting a volume of a fuel into the combustion chamber at an engine crank angle between about 330 degrees and about 365 degrees, the fuel having a cetane number less than about 40 and an octane number of at least 95, the fuel including less than about 500 ppm by weight of additives that affect cetane number;
igniting the volume of the fuel in the combustion chamber; and
combusting the volume of the fuel in the combustion chamber,
wherein a delay between initiation of injection of the volume of the fuel into the combustion chamber and initiation of combustion is less than about 2 ms, and
wherein the engine crank angle is greater than about 330 degrees by a sufficient margin such that at least about 30% of the energy generated from combusting the volume of the fuel is generated while the volume of the fuel is generated while the volume of the fuel is being injected into the combustion chamber.