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

Claim 0:
1. 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;
closing the intake valve;
moving the 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 fuel into the combustion chamber at an engine crank angle between about 330 degrees and about 365 degrees during a first time period, 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; and
combusting the volume of fuel,
wherein a delay between initiation of injection of the volume of fuel into the combustion chamber and initiation of combustion is less than about 1 ms.