Patent ID: 11959435
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 7:
8. A turbulent jet controlled compression ignition (TJCCI) engine system, comprising:
an engine block with a cylinder;
a piston configured to move up and down inside a main chamber of the cylinder;
a prechamber in fluid communication with the main chamber;
a fuel injector mounted to the engine block and in fluid communication with the main chamber; and
a computer system, having a memory and a processor, in communication with the piston, an exhaust valve, an intake valve, one or more fuel injectors, and a spark plug, wherein the spark plug is connected to the prechamber, where the processor is configured to:
operate an engine in a first engine operating map region and a second engine operating map region by performing passive jet ignition combustion with a first stoichiometric fuel mixture and a first volume of residual gas;
operate the engine in a mode transition region by performing passive jet ignition combustion with a second stoichiometric fuel mixture and a second volume of residual gas,
wherein the second volume of residual gas is controlled by an ignition timing to meet a target engine load;
operate the engine in a third engine operating map region by performing turbulent jet controlled compression ignition (TJCCI) with an ultra lean fuel mixture and a first volume of cooled exhaust gas recirculation;
operate the engine in the mode transition region;
operate the engine in a fourth engine operating map region by performing passive jet ignition combustion with a third stoichiometric fuel mixture and a second volume of cooled exhaust gas recirculation; and
operate the engine in a fifth engine operating map region, wherein the fifth engine operating map region is characterized by shutting off the engine.