Abstract: A rotary cylinder valve, reciprocating piston, internal combustion engine, has a crankshaft 2 and a transmission drive to drivingly connect the crankshaft 2 to the rotary cylinder 1, the axis of the cylinder 1 being at an angle to the axis of the crankshaft 2, the transmission drive including a gear train having a first gear 4 rotationally fast on the crankshaft 2, a second gear 8 rotationally fast on the rotary cylinder 1 and an idler gear 5 to transmit drive between the first and second gears.

Abstract: A seal arrangement for a rotary valve internal combustion engine having a cylinder 1 including a valve port 7 in communication with a combustion chamber 5, the cylinder 1 being rotatable about its longitudinal axis 1a in a cylindrical bore 8 of a valve housing 9, the valve housing having an inlet port 10 and an outlet port adapted to be aligned successively with said valve port 7 during rotation of the cylinder 1 in the housing 9 to enable fluid to flow respectively into and out of the combustion chamber 5. The seal arrangement forms a seal around the valve port 7 between the cylinder and a concentric surface, and comprises a seal element 12 located in a recess 11 in said cylinder, fluid pressure in said valve port 7 acting on said seal element 12 to urge the seal element into contact with the said concentric surface and outwardly from the centre of the port into contact with the periphery 7b of said recess 11.

Abstract: A cooling mechanism for a rotary valve cylinder engine 1 comprising a rotary valve cylinder 3 rotatably mounted within an outer cylindrical valve element 8, the rotary valve cylinder 3 and the outer cylindrical valve element 8 each being formed with a respective valve port 51, 71, 81, the rotary valve cylinder 3 being rotatable relative to the outer cylindrical valve element 8 to a position in which the ports 51, 71, 81 are aligned, the cooling mechanism comprising fluid passages 11, 28 formed in the rotary valve cylinder 3 and the outer cylindrical valve element 8 through which, in use, cooling oil flows.

Abstract: A rotating cylinder valve engine provides variable compression to the engine by axially moving the rotatable cylinder towards or away from the piston. The volumetric center of the combustion chamber is offset from the central axis of the piston. The engine cylinder is also ported to optimize performance.

Abstract: A conventional fuel injection system meters fuel by varying the time for which the injector is open. This is an empirical rather than fundamental method of metering the fuel. The amount of fuel delivered for a given injector opening time will depend on the pressure difference across the injector orifice and the exact dimensions of the injector orifice. Both these parameters are subject to variation. An injector (1) which comprises a plunger (2), a solenoid coil (3), and a conical return spring (11) which is driving a primary high pressure pump assembly consisting of a primary piston (4) within a primary cylinder (5) together with primary inlet valve (8) and primary outlet valve (7). The plunger (2) is also driving a secondary low pressure pump assembly consisting of a secondary piston (22), secondary cylinder (23), secondary inlet valve (24) and secondary outlet valve (25).

Abstract: A rotating cylinder valve engine (1) comprises an engine casing comprising two casing sections (2, 4) and a double piston and rotating cylinder assembly (5). The casing section (2) is formed with an internal chamber (6) that extends from a open-end of circular cross-section towards a closed-end of the casing section (2). Extending radially outward from the open-end of the casing section (2) is a substantially circular flange (8). The flange (8) comprises four lobe portions (10) each formed with a bolt hole. The flange (8) is formed with a circular radially inner recess (9). The casing section (2) is formed with a fuel inlet port 3a, port for a spark plug (3b) and an exhaust port (3c).

Abstract: A rotating cylinder valve engine (1) comprises an engine housing (2) that contains an annular timing ring (3), a rotatable cylinder (4) formed with a closed end (6) and an open end (8); and a piston (10) disposed within the cylinder (4). The cylinder (4) is mechanically driven by the piston (10) via transmission assembly that comprises a con rod (12) that drives a gear (14) that in turn engages a bevel gear (16) formed at the open end (8) of the cylinder (4). At the closed end (6) of the cylinder (4) there is an integral central rod (7) that extends axially away from the cylinder (4). There is an annular ball hearing (9) disposed at the one end of the rod (7).

Abstract: A conventional fuel injection system meters fuel by varying the time for which the injector is open. This is an empirical rather than fundamental method of metering the fuel. The amount of fuel delivered for a given injector opening time will depend on the pressure difference across the injector orifice and the exact dimensions of the injector orifice. Both these parameters are subject to variation. An injector (1) which comprises a plunger (2), a solenoid coil (3), and a conical return spring (11) which is driving a primary high pressure pump assembly consisting of a primary piston (4) within a primary cylinder (5) together with primary inlet valve (8) and primary outlet valve (7). The plunger (2) is also driving a secondary low pressure pump assembly consisting of a secondary piston (22), secondary cylinder (23), secondary inlet valve (24) and secondary outlet valve (25).

Abstract: The invention provides an internal combustion engine suitable for use with a model aircraft comprising an outer housing, a cylinder disposed within the outer housing and rotatable about an axis W—W, and a power transmission means comprising a reciprocable piston, a connecting shaft connecting the piston to a crankshaft having a bevel drive gear that meshes with a bevel gear ring disposed at one end of the cylinder, whereby a linear movement of the piston is converted into a rotational movement of the cylinder.