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| Number | Title | Issue Date |
| 7398759 | Four-stroke engine A four-stroke reciprocating piston internal combustion engine with an intake valve an exhaust valve and a valve drive assembly (18) driven by the crankshaft (4) for actuating the intake valve (8) and the exhaust valve (10) A mixture-prepa... | 07/15/2008 |
| 7363885 | Combustion engine having unitary structure of cooling fan and starter pulley A combustion engine according to the present invention has a unitary fan-pulley assembly (F), in which a cooling fan (8) and a starter pulley (9) are formed integrally with each other. The cooling fan (8) is fixed to a crankshaft (1). The... | 04/29/2008 |
| 7331315 | Two-stroke engine with fuel injection A two-stroke internal combustion engine is provided with a fuel injector. The two-stroke internal combustion engine may have at least one transfer passage, an air channel, and a fuel injector. The transfer passage is between a crankcase and a combustion chamber of t... | 02/19/2008 |
| 7275511 | Intake manifold assembly An intake assembly is provided for a sequentially fired eight cylinder V-type internal combustion engine including a cylinder block having a first band of cylinders and a second bank of cylinders. The assembly includes first, second, third, and fourth intake plenums... | 10/02/2007 |
| 7270110 | Four stroke internal combustion engine with inlet air compression chamber A four-stroke engine with intake air compression chamber. The intake air compression chamber has a pressure responsive displaceable member therein to compress inlet air passively in response to differential pressure between a sealed crankcase and air in the inlet si... | 09/18/2007 |
| 7096844 | Four-stroke engine lubricated by fuel mixture A four-stroke engine includes a piston cylinder, and a piston located in the cylinder and movable within the cylinder. The engine includes a crankcase attached to the cylinder, the piston providing a separation boundary of a combustion portion of the cylinder from t... | 08/29/2006 |
| 7096850 | Four-cycle internal combustion engine To provide a four-cycle combustion engine wherein the air-fuel mixture can be smoothly passed at all times by the utilization of the reciprocating motion of the piston to effectively lubricate the valve operating mechanism and the cranking mechanism and also to allo... | 08/29/2006 |
| 7077785 | Clutch connection/disconnection detection system for single-cylinder engine To detect with high accuracy the connection/disconnection of a clutch intermediately provided between a crankshaft of a single-cylinder engine and a power transmission for transmitting the output of the crankshaft. The rotation variation coefficient of a crankshaft ... | 07/18/2006 |
| 7073482 | Four-cycle internal combustion engine A four-stroke internal combustion engine is described, with at least one cylinder(9), a crankcase (3) which forms a crankcase pump and is connected via a valve (15, 18) each to an air manifold (16) for fresh air on the one hand and to an ... | 07/11/2006 |
| 7066140 | Crankcase scavenged four-stroke engine A crankcase scavenged and lubricated four-stroke engine (1) comprising especially: a mixture-preparation device (15) for supplying an air-fuel-lubricant mixture; an intake channel (16) connecting to the crankcase or cylinder to supply at least a... | 06/27/2006 |
| 7063065 | Four cycle, piston-driven, rotary ported intake and exhaust super atmospherically charged on demand internal combustion engine Disclosed in the field of the four-cycle reciprocating piston internal combustion engine is an invention for a rotary ported intake and exhaust system and super-atmospherically charged on demand engine. This invention replaces the inefficient reciprocating valve sys... | 06/20/2006 |
| 7040306 | Blowby gas ventilation system for an internal combustion engine, and method of using same A blowby gas ventilation system for an internal combustion engine capable of preventing oil from being diluted by efficiently and quickly exhausting a blowby gas together with a water content and the like from a crank chamber through forced ventilation of the crank ... | 05/09/2006 |
| 7011071 | Internal boost system for engines An internal boost system integrated to an engine is provided which includes a blanking plate; a plenum chamber disposed within the oil sump having an exit flange disposed through a side of the oil sump; at least one one-way valve disposed through the blanking plate ... | 03/14/2006 |
| 6994057 | Compression ignition engine by air injection from air-only cylinder to adjacent air-fuel cylinder The internal combustion engine relies on air injection for ignition instead of Otto cycle spark or Diesel cycle fuel injection. Cylinder pairs are connected by a cylinder-connecting valve, which opens near top-dead-center on the compression stroke injecting high-pre... | 02/07/2006 |
| 6988477 | Control apparatus for an internal combustion engine and control method thereof An engine is cranked by a motor generator at a start time of the engine. An engine ECU opens an intake valve or an exhaust valve during a compression stroke using a valve control mechanism during a period from when cranking is started until when a predetermined cran... | 01/24/2006 |
| 6936225 | Pressure-variation fluid transport, in particular for body-fluid analysis A fluid movement system for moving a sample fluid is preferably included in a cartridge to be inserted into a reading device. The fluid movement system includes a pressure variation means for moving the sample fluid under the influence of a pressure variation applie... | 08/30/2005 |
| 6830030 | Four-cycle engine A four-cycle engine wherein a fuel-air-oil mixture is compressed in a crank case chamber and directed therefrom along a pathway to a combustion chamber. The pathway contains actuating mechanism for actuating the fuel intake valve leading to the combustion chamber. T... | 12/14/2004 |
| 6766784 | Four-cycle engine A four-cycle engine fueled by a mixture of fuel and lubricant and including valve actuation mechanism contained in the path of the fuel flow. A component of the mechanism including a rotating gear having a gear shaft journalled between wall portions of the engine wh... | 07/27/2004 |
| 6763801 | Internal combustion engine utilizing internal boost An internal combustion engine is provided wherein the crankcase is sealed from the oil pan to provide an airtight compression chamber wherein the air is compressed by action of the pistons. Air is withdrawn from the atmosphere through one-way valves on the engine bl... | 07/20/2004 |
| 6715465 | Internal combustion engine with valve control An internal combustion engine includes at least one rotating, oscillating or reciprocating piston (20, 21) in a cylinder (11, 12). Each piston (20, 21) defines with the cylinder (11, 12) a combustion chamber (35). Each combustion c... | 04/06/2004 |
| 6712039 | Internal combustion engines An internal combustion engine comprising at least one pair of pistons (20, 21) rotating, oscillating or reciprocating in cylinder assemblies (11, 12) joined by a crankcase (13), each piston (20, 21) being driven by a crankshaft housed in ... | 03/30/2004 |
| 6659064 | Compact four-stroke combustion engine, especially for the use in a portable working device In order to create a compact four-cycle internal combustion engine with mixture lubrication comprising a cylinder which is closed on top by a cylinder head and which changes below into a crankcase, in the cylinder a piston moving up and down, in the cylin... | 12/09/2003 |
| 6561159 | Crankcase inducted self-supercharging four cycle internal combustion engine A crankcase inducted self-supercharging four-cycle internal combustion engine that uses cylinder pairs as an induction pump. The cylinder pairs are arranged in a 360-degree crank throw so that both pistons rise and fall together. The system uses two valve... | 05/13/2003 |
| 6467455 | Four-stroke internal combustion engine A four-stroke engine constructed using a gear with a port synchronized to the crankshaft by a power gear, and channels to direct the intake gases from the crankshaft housing into the combustion cylinder and to direct the exhaust gases out of the combustio... | 10/22/2002 |
| 6338328 | Crankcase inducted self-supercharging four cycle internal combustion engine A crankcase inducted self-supercharging four-cycle internal combustion engine that uses cylinder pairs as an induction pump. The cylinder pairs are arranged in a 360-degree crank throw so that both pistons rise and fall together. The cylinders are synchro... | 01/15/2002 |
| 6260536 | Intake passage device for an internal combustion engine An intake passage device is provided for an internal combustion engine having carburetor communicated with a connecting projection of an intake port of a cylinder of the engine, wherein the diameter of the connecting projection becomes smaller toward the ... | 07/17/2001 |
| 6145484 | Four-cycle engine having improved lubricating mechanism A four-cycle engine in which a mixed gas of a fuel and air containing a lubricating oil is transferred from a carburetor to a cylinder or a crank chamber, the gas is pushed out in the stage of descending the piston to the passage on the reverse side, tran... | 11/14/2000 |
| 6062180 | Device for increasing crankcase compression in an internal combustion engine A device for increasing crankcase compression in an internal combustion engine. The device includes a holder having an annular peripheral wall joined to an end wall. The holder is mounted on a crankshaft of the engine, between a main bearing and a crank p... | 05/16/2000 |
| 6055959 | Engine supercharged in crankcase chamber Several embodiments of crankcase compression supercharged four-cycle internal combustion engines. Supercharger pressure is controlled by bypassing pressurized gases from the crankcase back to the crankcase downstream of a check valve that permits flow int... | 05/02/2000 |
| 5992375 | Four-stroke cycle internal combustion engine The present invention provides a small and light four-stroke cycle internal combustion engine applicable to a compact power working machine. A cylinder head is provided with an ignition plug and an exhaust port with an exhaust valve. A crankcase is fixed ... | 11/30/1999 |
| 5960770 | Multi-cylinder engine of crankcase scavenging type for watercraft A multi-cylinder engine of a crankcase scavenging type suitable for use in watercraft. The engine has a very compact arrangement so that it can be used in either an outboard motor or as the prime mover for a watercraft such as a personal watercraft, to em... | 10/05/1999 |
| 5873332 | Water propulsion unit having a "V" shaped multi-cylinder crankcase scavenging engine A watercraft is propelled by an outboard motor having a water propulsion device powered by a multi-cylinder engine of a crankcase compression type, the engine positioned within a cowling of the motor. The engine has a very compact V type arrangement. The ... | 02/23/1999 |
| 5845618 | Engine for transport vehicle A number of embodiments of vehicles such as scooters that are powered a compact, high performance, four-cycle crankcase compression supercharged internal combustion engine. The engine is provided with two throttle valves, one on the intake side and one on... | 12/08/1998 |
| 5778833 | Water vehicle having a "V" shaped multi-cylinder crankcase scavenging engine A water vehicle having a hull defining an engine compartment and propelled by a water propulsion device powered by a multi-cylinder engine of a crankcase compression type positioned within the engine compartment is disclosed. The engine has a very compact... | 07/14/1998 |
| 5769039 | V shaped multi-cylinder engine of crankcase compression type A multi-cylinder engine of a crankcase compression type shown for use in an outboard motor. The engine has a very compact V type arrangement. The intake system for admitting the charge to the crankcase chambers and the exhaust manifold is located in the v... | 06/23/1998 |
| 5738051 | Four-cycle marine engine Disclosed herein is a four-stroke internal combustion engine comprising a common crankcase, a crankshaft extending in the crankcase, first and second cylinders respectively extending from the common crankcase in acute angular relation to each other and re... | 04/14/1998 |
| 5678525 | Fuel supply device for crankcase chamber supercharged engine A four-cycle internal combustion engine wherein the piston connecting rod crankshaft and crankcase chamber are formed so that the crankcase chamber acts as compressor. An induction system supplies atmospheric air to the crankcase chamber and a pressure co... | 10/21/1997 |
| 5657724 | Internal combustion engine construction Disclosed herein is an internal combustion engine comprising a crankcase assembly including a crankcase member including a crankcase cover mounting surface, and a cylinder assembly mounting surface including therein an opening, and a cylinder block fabric... | 08/19/1997 |
| 5579735 | Four-stroke internal combustion engine A four-stroke engine comprising an engine frame including a block and a head, the block forming at least one cylinder and a crankcase. A piston is mounted for reciprocation in the cylinder, and a crank and connecting rod are mounted in the crankcase and c... | 12/03/1996 |
| 5456230 | Four-stroke internal combustion engine with contaminated oil elimination Disclosed herein is a four-stroke internal combustion engine including a cylinder, a device for feeding fuel to the cylinder, a sealed crankcase chamber associated with the cylinder, a piston reciprocally movable in the cylinder and relative to the crankc... | 10/10/1995 |
