An internal combustion engine is provided using parts that can be produced simply and inexpensively, in which internal combustion engine the fuel is burned optimally by adjustments of compression ratio and valve control times and thus the least possible harmful exhaust gases are emitted while maximum effective power is achieved. Furthermore, all liquid and gaseous fuels can be used.

A reciprocating engine includes an engine body presenting an internal chamber and a fluid intake that supplies intake fluid to the internal chamber. The engine also includes a piston that oscillates within the internal chamber during engine operation. The engine body includes a block and a head that form the internal chamber.

A pulse-width-regulating valve is for the regulation of a fluid flow or a fluid pressure. The pulse-width-regulating valve comprises a cut-off valve connected in series with an inflow valve, at least one of the cut-off valve and the inflow valve being provided with an axially displaceable or rotatable valve element which has an opening position or a closing position at a distance from a starting position of the valve element. A method of operating a pulse-width-regulating valve comprises: regulating a valve gear device by a valve synchronizer, in accordance with at least two displacement curves; and by one or more valve actuators, displacing or rotating corresponding valve elements arranged in the pulse-width-regulating valve.

An engine includes: a block defining a cylinder bore; a crankshaft mounted for rotation in the block; a piston disposed in the cylinder bore; a connecting rod interconnecting the piston to the crankshaft; and a cylinder head coupled to the block and including: a combustion chamber aligned with the cylinder bore and having an intake opening and an exhaust opening communicating therewith; an intake port; an exhaust port; a rotatable inlet valve barrel disposed between the intake opening and the intake port and having a first diameter; and a rotatable exhaust valve barrel disposed between the exhaust opening and the exhaust port and having a second diameter different from the first diameter.

A modular rotary valve apparatus includes: a plurality of separate valve barrels coupled to each other and arranged end-to-end along an axis so as to define a valve shaft, each valve barrel having an annular peripheral surface extending between forward and aft end faces, and an aperture extending transversely therethrough communicating with the peripheral surface on opposite sides.

A cylinder head assembly for a cylinder of a four stroke internal combustion engine, including an intake rotor assembly that includes an intake rotor body, a first intake rotor shell portion, and a second intake rotor shell portion, and is operable to be rotatably received in at least one through bore of a cylinder head member. An exhaust rotor assembly includes an exhaust rotor body, a first exhaust rotor shell portion, and a second exhaust rotor shell portion, and is operable to be rotatably received in the at least one through bore of the cylinder head member. At least one of the first and second intake rotor shell portions or the first and second exhaust rotor shell portions are operable to be urged outwardly towards or against an interior surface of the at least one through bore of the cylinder head member so as to create a seal therebetween.

A method of operating an internal combustion engine having a housing, a piston mounted in the housing for complex motion about a plurality of axes and coupled to a shaft, and wherein occur phases of compression, combustion, and expansion in the housing, and wherein, in the compression phase, air introduced through an intake port into the housing is compressed by reducing volume of a compression chamber in the housing from an initial volume to a second volume that is less than the initial volume, and in the expansion phase, byproducts of combustion expand from the second volume to a third volume that is greater than the initial volume.

A reciprocating engine includes an engine body presenting an internal chamber and a fluid intake that supplies intake fluid to the internal chamber. The engine also includes a piston that oscillates within the internal chamber during engine operation. The engine body includes a block and a head that form the internal chamber.

A independent rotary valve engine and a method for controlling thereof includes an engine crankcase, a crankshaft located therein, a bidirectional servo motor connected to the engine crankcase, a cylinder block connected to the engine crankcase, and a cylinder head connected to the cylinder block, with a spark plug and a piston linked by a connecting rod to the crankshaft. An intake rotary valve is located within a first channel in the cylinder head, and an exhaust rotary valve is located within a parallel second channel. A pulley connects a servo motor shaft of the bidirectional servo motor to the intake rotary valve. An engine control device, operatively connected to the spark plug and the bidirectional servo motor, generates spark timing signals, receives an engine speed requirement, determines a wide-open throttle position and intake valve closing angle, and generates variable valve timing signals to rotate the servo motor shaft.

A independent rotary valve engine and a method for controlling thereof includes an engine crankcase, a crankshaft located therein, a bidirectional servo motor connected to the engine crankcase, a cylinder block connected to the engine crankcase, and a cylinder head connected to the cylinder block, with a spark plug and a piston linked by a connecting rod to the crankshaft. An intake rotary valve is located within a first channel in the cylinder head, and an exhaust rotary valve is located within a parallel second channel. A pulley connects a servo motor shaft of the bidirectional servo motor to the intake rotary valve. An engine control device, operatively connected to the spark plug and the bidirectional servo motor, generates spark timing signals, receives an engine speed requirement, determines a wide-open throttle position and intake valve closing angle, and generates variable valve timing signals to rotate the servo motor shaft.