Systems and methods for a piston engine including a recirculating system using supercritical carbon dioxide

A closed-loop piston engine system using a recirculating gas system with supercritical gas as a working fluid, the closed-loop piston engine system comprising:

• a supercritical gas injector for injecting the supercritical gas into a cylinder;
• a superheating nozzle region for imparting heat into the injected supercritical gas;
• a first valve of a cylinder head of the cylinder, the first valve being fluidly coupled with the recirculating gas system;
• a second valve of the cylinder head of the cylinder, the second valve being fluidly coupled with the recirculating gas system;
• a piston moving in the cylinder and coupled with a crankshaft, the piston being driven toward a centerline of the crankshaft during a power stroke using a connecting rod and causing the crankshaft to rotate thereby causing one power stroke per crankshaft rotation and thereby producing two power strokes for every single power stroke as being powered in a four-stroke hydrocarbon fuel internal combustion engine.

A closed-loop piston engine system using a recirculating carbon dioxide (CO2) system with supercritical carbon dioxide (scCO2) as a working fluid, the closed-loop piston engine system comprising:

• a scCO2 injector for injecting scCO2 into a first cylinder of a plurality of cylinders;
• a superheating nozzle region for imparting heat into the injected scCO2;
• a first valve of a cylinder head of the first cylinder, the first valve being fluidly coupled with the recirculating carbon dioxide (CO2) system;
• a second valve of the cylinder head of the first cylinder, the second valve being fluidly coupled with the recirculating carbon dioxide (CO2) system;
• a plurality of pistons each coupled with a crankshaft, the plurality of pistons each being driven toward a centerline of the crankshaft during a power stroke using a connecting rod and causing the crankshaft to rotate thereby causing one power stroke per crankshaft rotation and thereby producing two power strokes for every single power stroke as being powered in a four-stroke hydrocarbon fuel internal combustion engine.

A closed-loop piston engine system using a recirculating gas system with supercritical gas as a working fluid, the closed-loop piston engine system comprising:

• a supercritical gas injector for injecting the supercritical gas into a first cylinder, of a plurality of cylinders;
• a superheating nozzle region for imparting heat into the injected supercritical gas;
• a first valve of a cylinder head of the first cylinder, the first valve being fluidly coupled with the recirculating gas system;
• a second valve of the cylinder head of the first cylinder, the second valve being fluidly coupled with the recirculating gas system;
• a plurality of pistons each coupled with a crankshaft, the plurality of pistons being driven toward a centerline of the crankshaft during a power stroke using a connecting rod and causing the crankshaft to rotate thereby causing one power stroke per crankshaft rotation and thereby producing two power strokes for every single power stroke as being powered in a four-stroke hydrocarbon fuel internal combustion engine.