Class 123/51AA - Four-cycle separate crankshaft for piston

Subclass of Class 123 - Internal-combustion engines
No. of patents: 29
Last issue date: 06/03/2008

Number	Title	Issue Date
7380527	Internal combustion engine The invention concerns an internal-combustion engine, the engine comprising a first combustion chamber, a first piston displaceably guided in the first combustion chamber, the first piston facing the first combustion chamber with a first piston surface in a first di...	06/03/2008
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
7293534	Premixed charge compression ignition engine and reciprocating generator having the same The object of the present invention is to provide a premixed charge compression ignition (PCCI) engine. The PCCI engine has a fuel injector (22) in a suction manifold (8) to prepare a premixed charge of fuel and air and induces a natural ignition of th...	11/13/2007
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
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
7100567	Method to extend lean ignition limit within internal combustion engine A method of operating an internal combustion engine is provided. The engine includes a main combustion chamber in fluid communication with a prechamber. The method comprises the step of varying the volume within the prechamber during a portion of a compression strok...	09/05/2006
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
7004121	Arrangement at a piston engine and method of controlling the pistons A piston engine in the form of a piston pump or a piston engine (motor) comprises two or more piston cylinders (14b, 14c), preferably positioned with the same angular distances of 180 degrees for two cylinders, 120 degrees for three cylin...	02/28/2006
6938588	Controllable combustion method and device A method and device for controllably combusting combustible material, including a combustion device comprising an elongate combustion tube having an inlet section including an inlet for combustible material, an ignition section, including an igniter displaced along ...	09/06/2005
6039011	Internal combustion engine with opposed pistons An internal combustion engine has an engine block has a cylinder defined therein. The cylinder has a longitudinal axis. A first piston and a second piston are disposed within the cylinder. The first piston is directly opposed to the second piston. A first...	03/21/2000
5596955	Internal combustion engine A valveless four-stroke internal combustion engine employs an intake piston and an exhaust piston that reciprocate within intake and exhaust cylinders disposed adjacent the combustion chamber of the engine. A power piston reciprocates within a cylinder th...	01/28/1997
5560326	Internal combustion engine An internal combustion engine comprises one or more pairs of first and second cylinders, the first cylinder having a larger swept volume than the second cylinder and respective first and second pistons reciprocable in the cylinders. The second piston has ...	10/01/1996
5542382	Dual compression and dual expansion internal combustion engine and method therefor An apparatus and method is provided for a dual compression and dual expansion internal combustion engine (8) that is compact, efficient, and has low combustion noise and emissions. The subject engine (8) includes a low pressure piston assembly (56) recipr...	08/06/1996
5477818	Internal combustion engine An internal combustion engine presenting a number of cylinders, each defined by a respective axially symmetrical cavity formed in the engine block, and each defining, together with a piston sliding axially inside the cylinder and a head connected to the b...	12/26/1995
5456219	Dual compression and dual expansion internal combustion engine and method therefor An apparatus and method is provided for a dual compression and dual expansion internal combustion engine (8) that is compact, efficient, and has low combustion noise and emissions. The subject engine (8) includes a low pressure piston assembly (56) recipr...	10/10/1995
5289802	Internal combustion engine having opposed pistons An opposed piston internal combustion engine comprises an output shaft, at least one cylinder, at least one pair of first and second opposed pistons slidable in said cylinder, a first cam connected to the output shaft and a first cam follower assembly con...	03/01/1994
5133306	Horizontally opposed internal combustion engine Presented is an internal combustion engine that utilizes horizontally opposed pistons operating in direct opposition to one another in axially aligned open ended cylinders suspended below a base plate and arranged generally symmetrically on opposite sides...	07/28/1992
4981114	Stratified charge internal combustion engine Each main cylinder (10) of an internal combustion engine is provided with a smaller idle cylinder (12). Pistons (14, 20) in the cylinders (10, 12) are operated substantially in unison and are driven by crank shafts (18, 24) which are mechanically connecte...	01/01/1991
4773358	Manifold intake arrangement for internal combustion engines An intake manifold arrangement for internal combustion engines whereby the combustion chamber can be supercharged without the use of mechanical gears and/or pumps. A pressure chamber is mounted upon the combustion chamber and communicates with the combust...	09/27/1988
4759319	Internal combustion engine An internal combustion engine has two cylinders (12, 14) interconnected at their head ends by a combustion chamber (20) which contains a catalyst (22). The cylinders have respective pistons (16, 18) reciprocable towards and way from the combustion chamber...	07/26/1988
4753198	Compression ratio control mechanism for internal combustion engines An intake manifold arrangement for internal combustion engines whereby the combustion chamber can be supercharged without the use of mechanical gears and/or pumps. A pressure chamber is mounted upon the combustion chamber and communicates with the combust...	06/28/1988
4685428	Multi-cylinder internal combustion engine A multi-cylinder internal combustion engine comprising: first and second crankshafts disposed apart from and parallel with each other; first and second pistons operatively connected to the first and second crankshafts through connecting rods, respectively...	08/11/1987
4554894	Twin piston-per-cylinder engine An internal combustion engine has opposed cylinders defining a central combustion chamber therebetween. A pair of crankshafts are positioned outwardly of the respective cylinders by a distance which allows the pistons and connecting rods to be withdrawn f...	11/26/1985
4375792	Asymmetrical internal combustion engine An internal combustion engine adapted to be powered by a burnable gaseous fuel includes one cylinder, first and second pistons reciprocally movable in the cylinder substantially in opposite directions, inlet and outlet valves for controlling the flow of t...	03/08/1983
4363295	Movable head engine An internal combustion engine utilizing either an Otto or a Diesel cycle contains two opposed pistons in each cylinder. The first piston drives a crank arm which drives a crankshaft. The crankshaft, through a timing means, drives an eccentric positive-mot...	12/14/1982
4244338	Internal combustion engine An internal combustion engine is provided having a housing with a pair of crankshafts rotatably mounted within the housing in a spaced and parallel relationship. One or more throughbores, forming the cylinder for the engine, are provided in the housing be...	01/13/1981
4104995	Variable compression engine A diesel, gasoline or gas internal combustion engine adapted for operation on a two-cycle or four-cycle basis includes apparatus to vary the compression ratio of gases during operation of the engine. Two pistons, connected to separate crankshafts, communi...	08/08/1978
4037572	Paired piston engine with rotary valves A paired piston engine has a rotary valve positioned above and transversely to the cylinders. The rotor of each rotary valve unit has three passages associated with three ports in the pressure pieces at the sides of the rotors. One passage/port arrangemen...	07/26/1977
4010611	Compression-expansion power device A power device or mechanism embodying cyclic compression and expansion of compressible fluids, such as various gases, in a unique manner hereinafter referred to as the "Zachery" cycle. The power device, as disclosed, includes a chamber, such as a cylinder...	03/08/1977

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Class 123/51AA - Four-cycle separate crankshaft for piston