Patent ID: 8127544

Claim:
An engine system comprising: a) at least one combustor producing energetic hot gas, said combustor comprising: a cylindrical casing closed at each end by a cylinder head, a piston assembly oscillating in the cylindrical casing, said piston assembly comprising two pistons fixedly attached to each other by a rigid connecting rod, a divider element centrally disposed within the cylindrical casing and penetrated by the rigid connecting rod through a central bore, thereby forming two separate cylinders within the cylindrical casing, with a piston operating in each, an air inlet communicating with each cylinder for admitting and controlling the flow of combustion air, a fuel inlet communicating with each cylinder to introduce fuel into and mix fuel with said combustion air; at least one combustion chamber formed in each cylinder between each cylinder head and each piston head, at least one spark plug being mounted in the at least one combustion chamber of the at least one combustor; a source of electric power for generating an electrical spark to initiate combustion during initial start-up until the oscillation of the piston assembly compresses the air/fuel mixture in the at least one combustion chamber to auto-ignition temperature, and an outlet in each cylinder for discharging and controlling the flow of energetic hot gas produced by the auto-ignition of the air/fuel mixture in the at least one combustion chamber; b) a gas-driven motor to convert energy of the energetic hot gas produced in the at least one combustor to mechanical energy delivered to an external load via a rotating shaft, wherein said gas-driven motor is powered entirely by said energetic hot gas and further comprises: a rotating element being driven by the energetic hot gas from the at least one combustor based on at least one of aerodynamic flow, pressure, and positive displacement forces, the rotating shaft connected to the rotating element to transmit a mechanical output power to the external load, an inlet for the energetic hot gas from the at least one combustor to be supplied to the gas-driven motor, and an outlet to discharge the energetic hot gas to the ambient atmosphere after expansion by the gas-driven motor; c) at least one duct connecting the outlet of each cylinder of the at least one combustor to the gas-driven motor to supply the energetic hot gas from the at least one combustor to the gas-driven motor; and d) a rotary pre-compressor to deliver combustion air to the at least one combustor wherein said rotary pre-compressor is driven by a short shaft turned by an auxiliary gas-driven motor, said auxiliary gas-driven motor driven by a portion of the energetic hot gas produced by the at least one combustor.