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| Number | Title | Issue Date |
| 8087390 | Multi-link variable compression ratio engine A multi-link variable compression ratio engine is provided with a crankshaft, a piston, a control shaft, a linkage, a motor and a reduction mechanism. The crankshaft moves the piston within an engine cylinder. The control shaft has an eccentric axle eccentric relati... | 01/03/2012 |
| 7802544 | Engine load estimating apparatus and engine load estimating method An engine load estimating apparatus, including an actuator that changes a position of a top dead center of a piston of the engine, and a controller in communication with the actuator. The controller detects a drive output of the actuator when the actuator changes th... | 09/28/2010 |
| 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 |
| 7406930 | Variable displacement mechanism for internal combustion engine An internal combustion engine includes a cylinder structure in which a crankshaft assembly is journalled for rotation about a main axis of a main crankshaft segment having a main axis. A crank web is attached to the main crankshaft segment and projects from the main... | 08/05/2008 |
| 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 |
| 7305938 | Stroke-variable engine A stroke-variable engine includes a pivot shaft which is rotatably supported in a crankcase so as to be rotatable about an eccentric axis parallel to a crankshaft and which is connected to a control rod so that a rotational power reduced at a reduction ratio of 1/2 ... | 12/11/2007 |
| 7290507 | Lower link for piston crank mechanism of engine A lower link for an engine piston crank mechanism includes first and second half members joined by bolts to form a crankpin bearing portion. The first half member includes a first pin boss portion to connect the lower link with a first link which is one of an upper ... | 11/06/2007 |
| 7290508 | Lower link for piston crank mechanism of internal combustion engine A lower link for a piston crank mechanism of an internal combustion engine includes an upper section, a lower section, and a crank pin bearing section disposed between the upper section and the lower section, and mounted on a crank pin of a crank shaft. One of the u... | 11/06/2007 |
| 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 |
| 7240646 | Power plant including an internal combustion engine with a variable compression ratio system A power plant includes an internal combustion engine having a crankshaft to which a piston is connected and a variable compression ratio system for changing the position of the axis of rotation of the crankshaft. The power plant includes a transmission having a main... | 07/10/2007 |
| 7234424 | Variable stroke-characteristic engine for vehicle In a variable stroke-characteristic engine for a vehicle, a control shaft and a control link are disposed on a front side of a vehicle body with respect to a crankshaft. An actuator for driving the control shaft is disposed on an outer surface of an engine block on ... | 06/26/2007 |
| 7219647 | Force transfer mechanism for an engine A multiple watt-linkage force transfer mechanism is provided for an internal-combustion engine. The force transfer mechanism comprises two “bell cranks” that are used to drive a single crankshaft through a watt linkage mechanism. Each bell crank, in turn, is dri... | 05/22/2007 |
| 7213543 | Technique of detecting failure of compression ratio varying mechanism and controlling internal combustion engine In an internal combustion engine having a compression ratio varying mechanism, in response to detection of the occurrence of any failure or trouble in the compression ratio varying mechanism, the control technique of the invention restricts execution of a specific c... | 05/08/2007 |
| 7213545 | Reciprocating engine The invention relates to a reciprocating engine in a motor vehicle, comprising a coupling arrangement for transmission of a torque, from a crank shaft end, to a crank shaft flange supported in a cylinder block, the crank shaft end being movable in the radial directi... | 05/08/2007 |
| 7185616 | Gear system for an internal combustion engine An internal combustion engine has a cylinder block defining a cylinder. A piston is disposed in the cylinder. The internal combustion engine has a connecting rod connected to the piston and a crankshaft connected to the connecting rod. The internal combustion engine... | 03/06/2007 |
| 7185615 | Variable stroke engine A variable stroke engine includes a connecting rod having one end thereof connected to a piston via a piston pin. A sub-rod is connected to a crankshaft via a crankpin and to the other end of the connecting rod. A control rod has one end thereof connected to the sub... | 03/06/2007 |
| 7174863 | Mechanism for internal combustion piston engines A rocking mechanism through which linear reciprocating movement of a piston of an internal combustion engine can be transferred, from the remote end of a connecting rod on which the piston is mounted, to a crankshaft. The mechanism includes a rocking member; mountin... | 02/13/2007 |
| 7174865 | Engine with a variable compression ratio A VCR engine includes a crankshaft, a driveshaft, a plurality of crankshaft-driveshaft arm assemblies, a means to lift the crankshaft up and down, and a transmission assembly. The crankshaft-driveshaft arm assembly is a piece of metal to which a bearing that holds t... | 02/13/2007 |
| 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 |
| 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 |
| 7011052 | Variable crankshaft An adjustable crank shaft for a pump or engine allows the stroke of the piston to be varied. The piston rod has a circular bushing that engages an outer diameter portion of an outer crank member. The outer crank member has an inner diameter portion with a circular c... | 03/14/2006 |
| 7007640 | Engine with a variable compression ratio The engine is equipped with a crankshaft that is rotatably connected to pistons through connecting rods, and a driveshaft, which is used as the means for outputting the torque produced by the engine. The variable compression ratio mechanism of the preferred embodime... | 03/07/2006 |
| 6990934 | Internal combustion engine having variable compression ratio mechanism and control method therefor An internal combustion engine has a variable compression ratio mechanism operatable during an intake stroke to change an actual compression ratio of the engine, and is capable of correcting an amount of fuel injected into the engine in response to a change in the co... | 01/31/2006 |
| 6971342 | Adjustable compression ratio apparatus Apparatus is provided for adjusting a compression ratio of an engine having a crankshaft, a plurality of combustion cylinders, a moveable piston disposed within each combustion cylinder, and rods connecting each piston of the crankshaft. The apparatus generally incl... | 12/06/2005 |
| 6948460 | Crankshaft with variable stroke A drive apparatus, particularly for an internal combustion engine, allows the compression ratio to be changed while operating. A piston is slidably carried in a cylinder. The piston rod engages a power gear via an eccentric link. The power gear rotates around a rim ... | 09/27/2005 |
| 6920847 | Reciprocating engine with a variable compression ratio mechanism A reciprocating engine with a variable compression ratio mechanism is disclosed. A lubrication system of the engine is improved by controlling an oil pressure according to a compression ratio setting. The lubrication system includes various combinations of control v... | 07/26/2005 |
| 6915766 | Compression ratio controlling apparatus and method for spark-ignited internal combustion engine In a compression ratio controlling apparatus and method for a spark-ignited internal combustion engine, the variable compression ratio mechanism is controlled by a compression controlling section on the basis of a detected engine speed and engine load in such a mann... | 07/12/2005 |
| 6910454 | Method of and device for operating a multi-cylinder combustion engine with variable compression ratio In a multi-cylinder combustion engine with a variable compression ratio a start of the combustion engine is performed with a compression ratio which is reduced relative to compression ratios in normal operation of the combustion engine. ... | 06/28/2005 |
| 6877463 | Link mechanism of reciprocating internal combustion engine A link mechanism of an engine includes: an upper link having a first end connected to a piston pin of a piston; a lower link connected to the upper link via an upper pin having a center, the lower link being connected to a crank pin of a crank shaft; a control shaft... | 04/12/2005 |
| 6843212 | Engine with variable compression ratio An engine with a variable compression ratio includes a connecting rod connected to a piston, a first arm turnably connected to the connecting rod and to a crankshaft through a crankpin, a second arm integrally connected to the first arm, a control rod turnably conne... | 01/18/2005 |
| 6823824 | Engine having a variable compression ratio A compression ratio of an engine is varied by changing a position of a crankshaft relative to a piston in accordance with an operational condition of the engine. ... | 11/30/2004 |
| 6820577 | Engine of compression-ratio variable type In an engine of a compression-ratio variable type, a subsidiary rod and a piston connected to a crankshaft are connected to each other through a connecting rod, and an eccentric shaft mounted at an eccentric location on a support shaft turnably carried in an engine ... | 11/23/2004 |
| 6792924 | Engine control system of internal combustion engine with variable compression ratio mechanism and exhaust-gas recirculation control system A combustion control system for a spark-ignition internal combustion engine includes a variable piston stroke characteristic mechanism changing a compression ratio of the engine, sensors detecting engine operating conditions, i.e., engine speed and engine load, and ... | 09/21/2004 |
| 6779495 | Variable compression ratio engine A variable compression ratio engine includes a support shaft positioned eccentrically relative to rotating shafts. A restricting projection is provided at one location in the circumferential direction on the rotating shafts so as to project outward in the radial dir... | 08/24/2004 |
| 6772717 | Reciprocating piston internal combustion engine In a reciprocating piston internal combustion engine with a piston which is displacably arranged in a cylinder and is coupled in to a connecting rod whose movement can be transmitted to a crankshaft via a crank, a transmission element is provided between the connect... | 08/10/2004 |
| 6769404 | Combustion control system for spark-ignition internal combustion engine with variable piston strike characteristic mechanism and variable valve operating mechanism A combustion control system for a spark-ignition internal combustion engine includes a variable piston stroke characteristic mechanism changing a compression ratio of the engine, sensors detecting engine operating conditions, i.e., engine speed and engine load, and ... | 08/03/2004 |
| 6758202 | Control method for engine A control method adjusts fuel injection into an engine having a variable compression ratio. The method determines the cylinder air amount based on various sensors and the current compression ratio. The disclosed fuel injection method can perform both open loop and c... | 07/06/2004 |
| 6715453 | Method and apparatus for preventing locking of engine-operating-characteristic changing device A method of controlling an engine-operating-characteristic changing device operable between a first and a second operating state and including a locking device for locking the changing device in the first operating state in which a compression ratio of an intake air... | 04/06/2004 |
| 6684828 | Variable compression ratio mechanism for reciprocating internal combustion engine In a variable compression ratio mechanism for an internal combustion engine employing an upper link, a lower link, and a control link, the lower link includes a crankpin bearing portion into which a crankpin is fitted, a first connecting-pin bearing porti... | 02/03/2004 |
| 6637384 | Rigid crankshaft cradle and actuator Crankshaft main bearing failure in variable compression ratio engines having eccentric main bearing supports is prevented by supporting the bearings in a crankshaft cradle (16) having a high stiffness and a high natural frequency. The crankshaft cradle (1... | 10/28/2003 |
