Disclosed are a fuel supply system and method for a ship engine. The fuel supply system for a ship engine of the present invention comprises: a submersible pump which is provided to an LNG storage tank of a ship for supplying LNG to the engine of the ship; a high-pressure pump which has the LNG supplied thereto from the submersible pump and pressurizes the same under high pressure; and a return flow channel which, at the upstream of the high-pressure pump, returns the LNG to the LNG storage tank, wherein the flow of the LNG returning through the return flow channel is controlled, and the temperature of the LNG is controlled at the front end of the high-pressure pump.

Disclosed are a fuel supply system and method for a ship engine. The fuel supply system for a ship engine of the present invention comprises: a submersible pump which is provided to an LNG storage tank of a ship for supplying LNG to the engine of the ship; a high-pressure pump which has the LNG supplied thereto from the submersible pump and pressurizes the same under high pressure; and a return flow channel which, at the upstream of the high-pressure pump, returns the LNG to the LNG storage tank, wherein the flow of the LNG returning through the return flow channel is controlled, and the temperature of the LNG is controlled at the front end of the high-pressure pump.

An engine and a method of operating the engine wherein fuel, intake air, and recirculated exhaust gas provides a first mixture, which is inducted into a first combustion cylinder. The first mixture is combusted in the combustion cylinder to generate a first exhaust gas that applies pressure to a piston within the combustion cylinder, reciprocating the piston and rotating a primary crankshaft coupled to the piston. Fuel and intake air, which provides a second mixture, are inducted into a rotary combustion chamber. The second mixture is combusted in the rotary combustion chamber, wherein the combustion generates a recirculated exhaust gas that applies pressure to the rotor and rotates the rotor and a secondary crankshaft coupled to the rotor. The secondary crankshaft is coupled to the primary crankshaft by a gear mechanism. The recirculated exhaust gas is exhausted into an exhaust gas recirculation loop and recirculated.

A hybrid-electric propulsion system includes a turbomachine, a propulsor coupled to the turbomachine, and an electrical system, the electrical system including an electric machine coupled to the turbomachine. A method for operating a hybrid-electric propulsion system includes operating, by one or more computing devices, the turbomachine in an idle operating condition; receiving, by the one or more computing devices, a command to accelerate the turbomachine while operating the turbomachine in the idle operating condition; and providing, by the one or more computing devices, electrical power to the electric machine to add power to the turbomachine and increase an acceleration of the turbomachine in response to the received command to accelerate the turbomachine.

Power plants using multiple identical engine block assemblies to form multiple engines, each contributing to a common output or outputs, and each using an intake manifold, an exhaust manifold and an air rail. Air is first compressed by some engine cylinders and delivered to the air rail, and then coupled to combustion cylinders from the air rail. Compressions and combustion may be in the same cylinders, the same engine block assembly but different cylinders or in different engine block assemblies. Multiple engines in the power plants are less costly than single large engines because of the quantity of manufacture and ease of maintenance. Various embodiments are disclosed.

Power plants using multiple identical engine block assemblies to form multiple engines, each contributing to a common output or outputs, and each using an intake manifold, an exhaust manifold and an air rail. Air is first compressed by some engine cylinders and delivered to the air rail, and then coupled to combustion cylinders from the air rail. Compressions and combustion may be in the same cylinders, the same engine block assembly but different cylinders or in different engine block assemblies. Multiple engines in the power plants are less costly than single large engines because of the quantity of manufacture and ease of maintenance. Various embodiments are disclosed.

A hydrogen fueled powerplant including an internal combustion engine that drives a motor-generator, and has a two-stage turbocharger, for an aircraft. A control system controls the operation of the motor-generator to maintain the engine at a speed selected based on controlling the engine equivalence ratio. The control system controls an afterburner, an intercooler and an aftercooler to maximize powerplant efficiency. The afterburner also adds power to the turbochargers during high-altitude restarts. The turbochargers also include motor-generators that extract excess power from the exhaust.

A hydrogen fueled powerplant including an internal combustion engine that drives a motor-generator, and has a two-stage turbocharger, for an aircraft. A control system controls the operation of the motor-generator to maintain the engine at a speed selected based on controlling the engine equivalence ratio. The control system controls an afterburner, an intercooler and an aftercooler to maximize powerplant efficiency. The afterburner also adds power to the turbochargers during high-altitude restarts. The turbochargers also include motor-generators that extract excess power from the exhaust.

A hybrid vehicle HV is provided with an electric motor MT for generating vehicle drive force, an electrical generator GN for generating electric power to be supplied to the electric motor, a plurality of internal combustion engines EG1, EG2 for driving the generator, the plurality of internal combustion engines differing in output characteristics, and a controller CT configured to select one or more internal combustion engines from the plurality of internal combustion engines so that, when operating the selected one or more internal combustion engines in the respective high efficiency regions thereof, an engine output satisfies a required engine output and an engine operating efficiency is maximum, and to operate the selected one or more internal combustion engines in the respective high efficiency regions thereof.

A hybrid vehicle HV is provided with an electric motor MT for generating vehicle drive force, an electrical generator GN for generating electric power to be supplied to the electric motor, a plurality of internal combustion engines EG1, EG2 for driving the generator, the plurality of internal combustion engines differing in output characteristics, and a controller CT configured to select one or more internal combustion engines from the plurality of internal combustion engines so that, when operating the selected one or more internal combustion engines in the respective high efficiency regions thereof, an engine output satisfies a required engine output and an engine operating efficiency is maximum, and to operate the selected one or more internal combustion engines in the respective high efficiency regions thereof.