Class 123/79C - Concentric valves; relatively movable

Subclass of Class 123 - Internal-combustion engines
No. of patents: 36
Last issue date: 01/19/2010

Number	Title	Issue Date
7647902	Poppet valve and engine using same One embodiment of the present invention provides a poppet valve offering an increased valve area, comprising an outer valve head having an outer valve port and an inner valve head having an inner valve port. The inner valve head is rotatable relative to the outer va...	01/19/2010
7398748	Poppet valve and engine using same One embodiment of the present invention provides a poppet valve offering an increased valve area, comprising an outer valve head having an outer valve port and an inner valve head having an inner valve port. The inner valve head is rotatable relative to the outer va...	07/15/2008
7357117	Structured combustion chamber for use in engine A structured combustion chamber for an engine has a cylinder head with an intake hole portion communicating between an intake port and a combustion chamber and an exhaust hole portion which makes a communication between an exhaust port and the combustion chamber, an...	04/15/2008
7353797	Combustion chamber for internal combustion engine A geometry for an IC combustion chamber is disclosed that increases the air-fuel mixing efficiency within the chamber. The piston head includes a squish surface portion for generating a squish jet, and a bowl portion that cooperatively with the cylinder head defines...	04/08/2008
7311068	Poppet valve and engine using same One embodiment of the present invention provides a poppet valve offering an increased valve area, comprising an outer valve head having an outer valve port and an inner valve head having an inner valve port. The inner valve head is rotatable relative to the outer va...	12/25/2007
7296545	Coaxial poppet valve A two-piece intake assembly such as a coaxial poppet valve includes a main poppet valve with a stem attached to a head and an auxiliary poppet valve movable on the inner valve. A guiding element on the outer valve is configured to receive the inner valve stem, and i...	11/20/2007
6971344	Internal combustion engine An internal combustion engine is provided in which an intake valve, which opens and closes an intake valve hole formed in a cylinder head facing a combustion chamber has a hollow structure. An exhaust valve hole formed in the intake valve is made to open and close b...	12/06/2005
6659059	Variable displacement valve seat for internal combustion engines A variable displacement valve seat that consists of an annular ring which is affixed concentrically around a standard valve seat. The annular ring is affixed loosely to allow linear coaxial movement along the valve seat center-axis line. The movement is r...	12/09/2003
6598577	Intake valve An intake valve includes a floating seat for attaining variable valve timing. A valve stem is integral with a valve head base. The valve head base includes a region for accommodating a peripheral ring in vertically-actuable relationship. The region of the...	07/29/2003
6546902	Intake and exhaust valve system An intake and exhaust valve system (10) for an internal combustion engine having a combustion chamber (19) within a cylinder (13) closed at one end by a cylinder head (17). A cavity (25) is provided in the cylinder head opening onto the combustion chamber...	04/15/2003
6390078	Two stage concentric EGR valves A two stage exhaust gas recirculation (EGR) valve delivers a wide range of EGR flow while operating with reduced valve actuating forces allowing use of a reduced cost actuator such as a solenoid with smaller sized coil and armature. An attached valve body...	05/21/2002
6237549	Vented valve mechanism for internal combustion engines A two piece intake valve for internal combustion engines comprising an inner and an outer valve which can be designed with orbicular heads. The inner valve including a stem of a smaller outer diameter than the outer valve. The outer valve including a holl...	05/29/2001
6196171	Loop-scavenged two-stroke internal combustion engines A loop-scavenged two-stroke internal combustion engines with an intake valve (7) engaging a seat (10) for fresh air intake, and an exhaust valve (8) engaging a seat (13) for combustion gas exhaust, is disclosed. The valves are arranged in such a way that ...	03/06/2001
5803042	Valves and valve timing for internal combustion engine An exhaust valve assembly of an internal combustion engine selectively covers an exhaust manifold circumferentially located about a top wall of a cylinder without interfering with segments of a piston. The exhaust valve assembly includes a ring-shaped por...	09/08/1998
5782215	Intake/exhaust valve A valve assembly includes a block with a chamber formed therein and a port for accessing the chamber. A fluid inlet passage and a fluid exhaust passage are formed through the block and communicate with the port. A main valve includes a head which is recip...	07/21/1998
5555859	Internal combustion engines Internal combustion engines with a cylindrical working chamber (1) in which there slides a piston (3), and which is closed by a cylinder head (4) with a device (5) for injecting atomized liquid fuel under high pressure and operating on the two-stroke cycl...	09/17/1996
5357914	Vented valve mechanism for internal combustion engines A two piece intake or exhaust valve for internal combustion engines comprising an inner and an outer valve which can be designed with orbicular heads. The inner valve including a stem of a smaller outside diameter than the outer valve. The outer valve inc...	10/25/1994
5355848	Internal-combustion engine with concentric, annular intake and exhaust valves An internal-combustion-engine cylinder head has a concentric, annular passages to admit an intake charge into a combustion chamber and to remove combustion product exhaust gasses. Each of these passages is isolated from the combustion chamber by the closu...	10/18/1994
5140954	Concentric valve structure A concentric valve includes a first cylindrical housing and a concentric second cylindrical housing, with the second cylindrical housing defining an internal combustion intake valve mounted within an associated overhead valve assembly. An exhaust valve is...	08/25/1992
5085179	Double poppet valve apparatus A double poppet valve apparatus is mounted in a combustion chamber wall. A port is formed in the wall. A first valve member is mounted in the port. A second valve member is concentrically mounted within the first valve member. One or more resilient member...	02/04/1992
5000135	Gasoline engine with single overhead camshaft having duel exhaust cams per cylinder wherein each exhaust cam has duel lobes An improved gasoline engine using a spark plug and a spark plug wire is disclosed. The improved gasoline engine includes a cylinder having a cylinder wall and an upper end, a piston movably disposed within the cylinder, a gasoline injector for supplying t...	03/19/1991
4964384	Tornado engine The cylinder head of an engine has internal truncated conical intake and exhaust passageways which create a swirling mixture of gases in the cylinder. The intake valve is in the form of a ring with a plurality of parallel valve stems, preferably four, all...	10/23/1990
4957073	Multiple concentric intake/exhaust valve system for an internal combustion engine An intake and exhaust valve system deployed in an internal combustion engine that improves available charge flow through the engine, provides improved charge turbulence and swirl of charge during each intake stroke for better mixture, provides for multipl...	09/18/1990
4942850	Double-flow valve for internal combustion engines An inlet and exhaust valve in internal combustion engines is described in the form of a vessel, designed with a large through cavity in its interior. The valve has two guiderods (8, 9) and two seating zones (1, 2), one on its internal side in which a conv...	07/24/1990
4901683	Vented valve for internal combustion engines A two part intake or exhaust valve comprising an inner and an outer valve, both circular in shape, with the inner valve having a longer stem of a smaller radius to extend above the outer valve. The outer valve has a hollow stem large enough to accept the ...	02/20/1990
4893592	Combustion chamber for an internal combustion engine A combustion chamber of an internal combustion engine includes a co-axial valve mechanism with a hemispherically concave exhaust valve disk actuated by a single overhead camshaft. A piston face is provided including an offset shallow bowl for accommodatin...	01/16/1990
4836154	Poppet valve assembly with apertures An intake or exhaust valve assembly for use in a four cycle internal combustion engine including a primary poppet valve, said primary poppet valve having at least one aperture disposed through its valve body and a secondary poppet valve body mounted to se...	06/06/1989
4815422	Four stroke piston engine A four-stroke piston engine in which air is drawn into a cylinder while rotary motion about the cylinder axis is imparted to the air. Fuel may be blown/injected into the air during its rotation in the cylinder while the fuel supply is located on the axis ...	03/28/1989
4649872	Stratified combustion engine Combustion engine having a cylinder and a piston movable therein and having a spark plug for igniting the combustible fuel. Three valves are concentricly located coaxially with the spark plug for separately controlling the flow of incoming fresh air to th...	03/17/1987
4640237	Four stroke piston engine A four-stroke piston engine in which air is drawn into a cylinder while rotary motion about the cylinder axis is imparted to the air. Fuel may be blown/injected into the air during its rotation in the cylinder while the fuel supply is located on the axis ...	02/03/1987
4539950	Four-stroke piston engine A four-stroke piston engine in which air or a fuel-air mixture is drawn into a cylinder. Fuel may be injected into the air in the cylinder while a further fuel supply is located on the axis of the cylinder and supplies at least one jet of fuel during the ...	09/10/1985
4503817	Annular valve stratified charge spark ignition engines An internal combustion engine having an annular port and valve arranged to direct flow from dual inner and outer portions of the port in cylinder flow patterns having radially oppositely directed flow components. Various embodiments providing cylinder cha...	03/12/1985
4450796	Four-stroke piston engine A four-stroke piston engine in which air or a fuel-air mixture is drawn into a cylinder. Fuel may be injected into the air flowing into or already present in the cylinder while a further fuel supply is located on the axis of the cylinder and supplies at l...	05/29/1984
4450795	Four-stroke piston engine A four-stroke piston engine in which air is drawn into a cylinder while rotary motion about the cylinder axis is imparted to the air. Fuel may be blown/injected into the air during its rotation in the cylinder while the fuel supply is located on the axis ...	05/29/1984
4449490	Concentric intake and exhaust valve assembly An internal combustion engine having a cylinder bore providing a combustion chamber, and a piston located in the cylinder bore. A head mounted on the cylinder has concentric intake and exhaust valves operable to control the flow of gas into and out of the...	05/22/1984
4094277	Intake valve mechanism for preventing back flow of exhaust gas The intake valve mechanism employs a back-flow valve to prevent undesirable back-flow of gases from a combustion chamber of an internal combustion engine out an intake port of the chamber during a period of time in which a poppet valve for the intake port...	06/13/1978

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Class 123/79C - Concentric valves; relatively movable