Class 123/51B - Two-cycle

Subclass of Class 123 - Internal-combustion engines
No. of patents: 66
Last issue date: 03/17/2009

Number	Title	Issue Date
7503290	Two-stroke internal combustion engine supplied with gasoline, diesel fuel or other conventional fuel The invention concerns a two-stroke internal combustion engine supplied with gasoline, diesel, fuel, or other conventional fuel comprising a piston (2)-cylinder (1) assembly, said cylinder (1) providing exhaust ports (11), said piston (	03/17/2009
7434550	Internal combustion engine An improved configuration for an opposing piston-opposing cylinder (“OPOC”) internal combustion engine with a single camshaft to reduce friction between the pistons and the cylinder walls during the combustion phase of the engine cycle. The improvements are pres...	10/14/2008
7360511	Opposed piston engine A two-cycle, opposed piston engine with side-mounted crankshafts and cylinders isolated from mechanical stresses of the engine includes tailored cooling of cylinders and symmetrical cooling of the interior surfaces of piston crowns. Each opposed piston includes a co...	04/22/2008
7362035	Polymer bulk acoustic resonator A polymer bulk acoustic resonator that includes an active semiconductor layer, a first thin film electrode layer applied to the semiconductor layer, a thin film electro-active polymer layer applied to the first thin film electrode layer; and a second thin film elect...	04/22/2008
7337869	Hydraulic hybrid vehicle with integrated hydraulic drive module and four-wheel-drive, and method of operation thereof A vehicle includes an integrated drive module coupled to an axle thereof. The module includes a hydraulic motor configured to provide motive power at an output shaft, and a differential for distributing the motive power to right and left portions of the axle. The hy...	03/04/2008
7237542	Internal combustion engine The invention concerns a combustion engine comprising a cylinder and a piston which is displaceably guided in the cylinder, the piston having a piston head facing a combustion chamber and being coupled to a crankshaft via a connecting rod, wherein a second piston wh...	07/03/2007
7219633	Compression ignition rotating cylinder engine A compression ignition rotating cylinder engine (CIRC), provides a design that has several distinct advantages over conventional internal combustion engines. Rotating cylinder blocks and a fixed header plate provide a more fuel-efficient engine with constant positiv...	05/22/2007
7210429	Rotating positive displacement engine An engine including a stationary housing; a cylinder bank rotatably mounted to the housing about a central longitudinal axis, the cylinder bank having a plurality of cylinders therein radially distanced from and parallel to the central longitudinal axis, each cylind...	05/01/2007
7178324	External combustion engine An external combustion engine comprises a compressor assembly, a heater assembly, an expander assembly, a cooler assembly, and auxiliary systems. The preferred embodiment of this invention uses fossil fuel as the main source of energy, and water substance for the wo...	02/20/2007
7156056	Two-cycle, opposed-piston internal combustion engine In a two-cycle, opposed-piston internal combustion engine with optimized cooling and no engine block, the opposed pistons are coupled to a pair of crankshafts by connecting rods that are subject to substantially tensile forces acting between the pistons and the cran...	01/02/2007
7124716	Internal combustion engine using opposed pistons An internal combustion engine having a cylindrical outer housing with inner cylindrical cylinders defining power cylinders circumferentially spaced in the engine. Each of the cylinder(s) has opposed intake and exhaust pistons. The intake and exhaust pistons use air ...	10/24/2006
7121236	Split-cycle engine with dwell piston motion A method for decelerating an expansion piston of an engine is presented. The engine includes an expansion piston slidably received within an expansion cylinder and operatively connected to a crankshaft such that the expansion piston reciprocates through an expansion...	10/17/2006
7100546	Crankshaftless internal combustion engine The engine of the present invention provides the direct transfer of energy from the burning down of fuel in the engine cylinders into shaft power by forcing working liquid through guide devices and against an impulse turbine, thereby eliminating the need for supplem...	09/05/2006
7066115	Internal combustion engine/hydraulic motor/fluid pump provided with opposite pistons An internal combustion engine has a pair of opposed pistons held within an elliptical guide of the engine housing. The pistons reciprocate within a cylinder attached to a shaft. A combustion chamber is formed within the shaft and positioned to be between the pistons...	06/27/2006
7055470	Internal combustion engines having double cylinder units An internal combustion engine may comprise at least one double cylinder (17). A piston (10, 12) is reciprocally movably disposed in each individual cylinder (14, 16) of the double cylinder and each piston is connected to a crankshaft (4)....	06/06/2006
7037093	Dividing device A dividing device, comprising at least one vane-type rotor comprising a hub provided with continuous vanes which are slidable through the hub along their longitudinal axis and almost perpendicular to the axis of the hub, the hub being provided with axial grooves for...	05/02/2006
7017534	Piston-cam engine A piston-cam engine includes a drive cylinder, a drive piston operably disposed therein having a piston head and a shaft, a support frame having a drive shaft rotatably movably connected thereto, a cam having a peripheral surface and having a plurality of lobes ther...	03/28/2006
7004120	Opposed piston engine A four-stroke opposed piston engine includes a rotating cylinder with a circumference and an aperture defined through the circumference, first and second opposing pistons, optional first and second opposing cylindrical spacers, first and second opposing piston caps,...	02/28/2006
6941837	Bilateral connecting rod apparatus An apparatus and method provide a true bilateral connecting rod apparatus having a crankshaft defining an axis of rotation and a rod journal eccentrically mounted for circular rotation about the axis, and a pair of connecting rods attached to the rod journal for rec...	09/13/2005
6935302	In-cylinder injection type internal combustion engine An in-cylinder injection type internal combustion engine is provided, which first fires a first spark plug and thereafter fires a second spark plug when a required load is low and which first fires the second spark plug and thereafter fires the first spark plug when...	08/30/2005
6467440	Two stroke internal combustion engine A two stroke internal combustion engine, comprising one or more power cylinders with intake and exhaust ports and a source of scavenging of the power cylinders, with improvements, including use of double-sided cylinders with upper and lower cavities used ...	10/22/2002
6318309	Opposed piston engine with reserve power capacity Two pistons are reciprocatively disposed in each cylinder of an engine thereby forming combustion chambers at each end of the cylinder that operate in a four-stroke cycle, and a third combustion chamber formed between the pistons that selectively operates...	11/20/2001
6202605	Arrangement in a two cycle combustion engine with internal combustion The internal combustion engine has a plurality of cylinders which are arranged in an annular series about a common central drive shaft. Each cylinder includes a pair of opposed pistons which are movable towards and away from each other while defining a co...	03/20/2001
6182619	Two-stroke diesel engine A two-stroke, opposed piston, diesel engine is provided herein. The engine includes a thermal shield and a fluid gap which surround the exhaust ports to shield the engine block from an exhaust fluid from the cylinder assembly. Additionally, a cooling flui...	02/06/2001
6170443	Internal combustion engine with a single crankshaft and having opposed cylinders with opposed pistons A two-stroke internal combustion engine is disclosed having opposed cylinders, each cylinder having a pair of opposed pistons, with all the pistons connected to a common central crankshaft. The inboard pistons of each cylinder are connected to the cranksh...	01/09/2001
6142111	Power machine The present invention is for the kind of power machines, engines, pumps or compressions which have two or more pistons which work against each other preferably with a common combustion chamber or corresponding, in a stationary cylinder and where the power...	11/07/2000
5722355	Twin-piston engine A twin-piston engine (1), i.e., a crankcase scavenged two-stroke internal combustion engine comprising two pistons (2,3) travelling in essentially the same direction, and wherein one (4) of the cylinder bores, the exhaust bore (4), contains all exhaust po...	03/03/1998
5191863	Rotary sleeve-valve internal combustion engine The present invention is an internal combustion engine having a rotary sleeve valve mechanism with a sleeve valve which has an opening formed in the outer peripheral surface for suction of fuel and discharge of exhaust gas. The present invention achieves ...	03/09/1993
5161491	Internal combustion engine An internal combustion engine which includes a system to deliver a combustible mixture to a cylinder, ignite the combustible mixture and exhaust the mixture after ignition. The internal combustion engine comprises at least one piston capable of reciprocat...	11/10/1992
5081961	Internal combustion engine with rotary exhaust control A rotary commutator valve that is located at the exhaust ports of the cylinder of an internal combustion, reciprocal engine for regulating the flow of exhaust and allowing the exhaust ports to be sequentially utilized as supplementary intake ports for cha...	01/21/1992
5031581	Crankless reciprocating machine The machine (e.g. an internal combustion engine or pump) has at least one cylinder 4 housing two opposed pistons 5 adapted to reciprocate in opposite directions and a common working chamber 13. A main shaft 1 carries two contoured tracks 3 each having opp...	07/16/1991
4986226	Internal combustion engine An internal combustion engine comprising an engine block including a plurality of parallel, spaced apart cylinder modules, each module having a cylinder bore and a pair of pistons in each bore which are simultaneously movable in opposite directions and a ...	01/22/1991
4974555	Piston motor with parallel cylinders arranged around the driving shaft The invention is embodied in a multi-cylinder internal combustion engine. The cylinders (4) of the engine are arranged parallel about the output shaft (2). Each cylinder (4) has a piston (5) and each piston has a driving rod (6). The driving rods move par...	12/04/1990
4974556	Internal combustion engine An internal combustion engine includes a pair of opposed piston assemblies that reciprocate within a single combustion chamber in an engine block. Each piston assembly includes an annular piston head that is received concentrically around a driveshaft whi...	12/04/1990
4964379	Twin-piston two-stroke engine Two pistons in adjacently situated cylinders in a twin-piston two-stroke engine share a common combustion chamber. To ensure low exhaust gas emissions with low consumption, a lean mixture is burnt whereof the complete combustion is made possible by design...	10/23/1990
4915064	Internal combustion engine with opposed pistons A combustion engine comprises a plurality of cylinders. Each cylinder contains aligned pistons displaceable toward and away from one another. Rotary cam disks are connected to a drive shaft and are arranged to be contacted by respective ones of the piston...	04/10/1990
4905637	Diesel aircraft engine--also convertible for other applications--optimized for high output, high supercharge and total energy utilization A diesel engine with a wobble plate for aircraft comprises cylinders of which the axis is arranged coaxially to the shaft. The pistons move into a cylinder and form a common combustion chamber. The pistons control the exhaust and intake with control times...	03/06/1990
4869212	Modular universal combusion engine An engine for rotating a main drive shaft (14) from a plurality of power modules (18) arranged in a concentric circumferentially spaced relation about a main drive gear (12) secured to the main drive shaft (14). Each power module (18) has a pair of parall...	09/26/1989
4809646	High pressure reciprocator components High Pressure reciprocator components for reciprocating machines particularly internal combustion engines, the components include a multiple ring, single groove, piston seal having stacked ring elements with top contraction rings to block cylinder pressur...	03/07/1989
4732115	Interval spark ignition combustion engine A two stroke spark ignition engine requiring a minimum of one pair of cylinders is constructable in multiple cylinder pairs. Each cylinder contains two oppositely working pistons. Four pistons drive, without rocking couples, opposite sides of a single cra...	03/22/1988

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Class 123/51B - Two-cycle