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| Number | Title | Issue Date |
| 8100097 | Multi-link engine A multi-link engine has a piston coupled to a crankshaft to move inside an engine cylinder. A piston pin connects the piston to an upper link, which is connected to a lower link by an upper link pin. A crank pin of the crankshaft rotatably supports the lower link th... | 01/24/2012 |
| 7802543 | Spark ignition type internal combustion engine An internal combustion engine provided with a variable compression ratio mechanism able to change a mechanical compression ratio and an actual compression action start timing changing mechanism able to change a start timing of an actual compression action. An amount... | 09/28/2010 |
| 7770549 | Compression reduction device for piston spark ignition internal combustion engines with removable cylinders A compression reduction device for internal combustion, spark ignition, piston engines with removable cylinders. The device is installed under each cylinder of an engine to reduce the engine's compression ratio, thereby allowing the safe use of lower octane unleaded... | 08/10/2010 |
| 7690336 | Adaptive miller cycle engine A Miller cycle combustion engine capable of operating on multiple fuel types, and a method of operating the engine, is provided. The engine includes a fuel type determiner to determine the fuel type, and a compression adjustor to adjust the compression of a first cy... | 04/06/2010 |
| 7584724 | Variable compression ratio dual crankshaft engine A synchronized, dual crankshaft engine (10) uses a phase-shifting device (42) to alter the angular position of one crankshaft (12) relative to the other crankshaft (14) for dynamically varying the engine's developed compression ratio. Eac... | 09/08/2009 |
| 7559298 | Internal combustion engine An internal combustion engine is provided. Facing pistons eliminate a cylinder head, thereby reducing heat losses through a cylinder head. Facing pistons also halve the stroke that would be required for one piston to provide the same compression ratio, and the engin... | 07/14/2009 |
| 7527025 | Internal combustion engine variable compression ratio system In an internal combustion engine variable compression ratio system, a compression ratio of an internal combustion engine is changed over between a high compression ratio and a low compression ratio with a changeover threshold value corresponding to a predetermined o... | 05/05/2009 |
| 7506620 | Device and method for controlling internal combustion engine with universal valve gear system and variable compressing mechanism A control device for controlling an engine, comprising a variable lift mechanism capable of changing the lift of a valve and a variable compression ratio mechanism capable of changing a compression ratio in a combustion chamber. The control devise controls the varia... | 03/24/2009 |
| 7430995 | Constant optimum total compression: real-time manipulation of combustion chamber volume as a means of optimizing compression in internal combustion engines In conventional engines, the compression ratio is a constant. Therefore, cylinder pressure increases proportionately with intake manifold pressure. As manifold pressure changes dramatically according to load, a conventional engine cannot maintain anywhere near const... | 10/07/2008 |
| 7412958 | Internal combustion engine A piston-crank mechanism links crankpins of a crankshaft with piston pins of pistons by using a plurality of links. The piston-crank mechanism allows an upward inertia force produced near a top dead center of each piston to be smaller than a downward inertia force p... | 08/19/2008 |
| 7392795 | Internal combustion engine and combustion control method An internal combustion engine is provided that basically comprises a combustion chamber, an electric discharge unit and a controller. The combustion chamber receives a mixture of fuel and air that is caused to undergo compression self ignition. The electric discharg... | 07/01/2008 |
| 7377238 | Variable compression ratio device of internal combustion engine A variable compression ratio device of an internal combustion engine includes a piston inner part connected to a connecting rod and a piston outer part fitted on an outer periphery of the piston inner part. The piston outer part is only slidably in an axial directio... | 05/27/2008 |
| 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 |
| 7360513 | Internal combustion engine that uses a variable compression ratio device A variable compression ratio mechanism that changes the compression ratio according to the rotation angle of a control shaft, wherein a stopper is provided at the highest compression ratio side for regulating the rotation of the control shaft. Then, the output detec... | 04/22/2008 |
| 7347170 | Frequency modulated VCR-engine A control method for the modulation of the torque of piston combustion engine that has a compression chamber (6) of variable volume and operable inlet valves (3). The torque requested for a predetermined operative condition is obtained through a select... | 03/25/2008 |
| 7334547 | Variable expansion-ratio engine A variable expansion-ratio engine includes an expansion-ratio adjuster configured to adjust an expansion ratio; a load detector configured to detect an engine load; and a controller configured to control the expansion-ratio adjuster. The controller controls the expa... | 02/26/2008 |
| 7322321 | Engine valve assembly having holding tank with return valve and discharge valve in the valve assembly An Elevated Expansion-Ratio Internal Combustion Engine has a substantially standard repeating four-stroke sequence for each of a plurality of cylinders. The head of each cylinder has an intake valve, a combustion-gas exhaust valve, and a vapor return valve. A return... | 01/29/2008 |
| 7318397 | High efficiency high power internal combustion engine operating in a high compression conversion exchange cycle A piston (10), a spring (15) operatively coupled to a piston, the spring being inside (21) or outside (41) the piston, and if the spring is inside the piston, the diameter of the spring is equal to 0.7 to 0.9, and if it is outside of the ... | 01/15/2008 |
| 7290527 | Vehicle control system A method is provided for controlling an engine having an intake manifold and an outlet control device coupled to the manifold for controlling flow exiting the manifold and entering at least one cylinder of the engine. The engine further includes an inlet control dev... | 11/06/2007 |
| 7284512 | Compression ratio variable device of internal combustion engine An internal combustion engine variable compression ratio system includes a piston inner, a piston outer that, while being fitted around the outer periphery of the piston inner, so it slides only in the axial direction, is capable of moving among low (L), high (H), a... | 10/23/2007 |
| 7273022 | Concentric piston for variable compression ratio directly based on the combustion chamber pressure This invention produces a variable compression ratio in internal combustion engines, based on a sliding concentric piston which moves up by an internal spring and down by the different changing pressures over the concentric piston head, within the combustion chamber... | 09/25/2007 |
| 7270092 | Variable displacement/compression engine An internal combustion engine with improved efficiency provides continuous variable displacement and/or compression ratio tuning to one of a number of fuel types to be used by the engine. By varying displacement without changing the compression ratio, the engine can... | 09/18/2007 |
| 7267087 | Variable compression ratio scheduling at idle speed conditions A method for selecting compression ratio of a variable compression ratio internal combustion engine when such engine is operating under an idle condition is disclosed. The compression ratio is selected to avoid engine knock, an undesirable phenomenon which is more l... | 09/11/2007 |
| 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 |
| 7228824 | Internal combustion engine having variable compression ratio selection as a function of projected engine speed A method for operating an internal combustion engine. The method includes: providing a functional relationship between time rate of change in engine speed, and compression ratio switching engine speed limit; determining time rate of change in engine speed; determini... | 06/12/2007 |
| 7228827 | Control method for vehicle having an engine A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unite, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention ach... | 06/12/2007 |
| 7194988 | Combustion-type power tool A combustion-type power tool includes a cylinder and a combustion chamber disposed on top of the cylinder that accommodates a gaseous mixture of existing air in the combustion chamber and fuel injected therein. A spark plug generates a spark to combust the gaseous m... | 03/27/2007 |
| 7191756 | System and method for controling crankshaft position during engine shutdown using cylinder pressure Systems and methods for controlling stopping position of a crankshaft during shutdown of a multiple cylinder internal combustion engine influence cylinder pressure independent of associated intake/exhaust valves during shutdown of the engine so the crankshaft stops ... | 03/20/2007 |
| 7165517 | Control apparatus and method for internal combustion engine with variable compression ratio mechanism A control apparatus for an internal combustion engine includes a variable compression ratio mechanism capable of varying a compression ratio of the engine, a compression ratio setting section that sets a compression ratio to be attained by the variable compression r... | 01/23/2007 |
| 7159543 | Controlling an engine with a multi link-type piston crank mechanism An engine having a cylinder, a piston slideably received in the cylinder, a crankshaft connected to the piston, and a multi-link piston crank mechanism. The multi-link piston crank mechanism controls movement of the piston such that an acceleration of the piston at ... | 01/09/2007 |
| 7159544 | Internal combustion engine with variable displacement pistons An engine includes at least one cylinder bore having a cylinder wall and a piston positioned within the cylinder bore, and adapted for reciprocal movement therein. At least one piston sleeve is positioned within the cylinder bore, radially between the piston and the... | 01/09/2007 |
| 7156376 | Carburetor electronic control system A carburetor electronic control system includes: transmission devices coupled to valves for opening and closing an intake path of a carburetor; electric motors that make the valves open and close via the transmission devices; and an electronic control unit for contr... | 01/02/2007 |
| 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 |
| 7152582 | Gasoline type identifying system and method for identifying gasoline type The types of gasolines having different distillation characteristics and various compositions are identified accurately and rapidly. A pulse voltage is applied for a predetermined time to a liquid type identifying sensor heater including a heater and an identifying ... | 12/26/2006 |
| 7121235 | Reciprocating internal combustion engine An internal combustion engine (1010 or 2000) is provided. The internal combustion engine includes a housing (1013 or 1068) and a piston assembly (6, 1012, and 2038) disposed in the housing. The piston assembly is substantial... | 10/17/2006 |
| 7066146 | Controller of internal combustion engine A device for controlling an internal combustion engine, comprising a variable valve mechanism for varying opening areas (valve lift) or the working angles (valve-opening periods) of at least either the intake valves or the exhaust valves, wherein a pressure in the c... | 06/27/2006 |
| 7047917 | Variable compression ratio mechanism In a variable compression ratio mechanism that serves to change the compression ratio of an internal combustion engine by rotating camshafts so as to cause relative movement between a cylinder block and a crankcase, an oil film forming device forms oil films on the ... | 05/23/2006 |
| 7043349 | Method and system for inferring exhaust temperature of a variable compression ratio engine A method for operating a variable compression ratio internal combustion engine includes the steps of determining a compression ratio operating state of the engine and inferring an exhaust temperature for the engine based at least in part on the compression ratio ope... | 05/09/2006 |
| 6980903 | Exhaust gas control using a spark plug ionization signal This feature of the present invention comprises a method and apparatus to reduce NOx emissions in an internal combustion engine. This feature of the present invention uses a closed loop control of the exhaust gas re-circulation to provide the engine with the either ... | 12/27/2005 |
| 6976456 | Connecting rod An adjustable connecting rod system includes a reliable, rapidly responsive mechanism for varying effective connecting rod length to vary the compression ratio of the engine. The mechanism may employ the momentum of connecting rod components during operation of the ... | 12/20/2005 |
