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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 |
| 7370618 | Internal combustion engine with five valves per cylinder Otto cycle internal combustion engine, comprising a cylinder block including at least one cylinder having a longitudinal axis, a piston movable within said cylinder and having a recess open on a head surface of the piston, a head fastened to said cylinder block and ... | 05/13/2008 |
| 7341027 | Portable 4-cycle engine and portable machine equipped with the 4-cycle engine A portable 4-cycle engine with a configuration which allows cooling air to flow in the direction of the crankshaft relative to a cylinder head on a cylinder, and a portable machine equipped with this engine, are provided, respectively. In such an engine, the cylinde... | 03/11/2008 |
| 7299776 | Valve assembly for an internal combustion engine A valve assembly for an internal combustion engine includes: at least two valves supported by a pair of valve stem holders; a bracket; a closing actuator for pivoting and closing the valves upon contact with a closing lobe of a camshaft; one or more opening actuator... | 11/27/2007 |
| 7228833 | Rocker system for an internal combustion engine An improved rocker system for actuating valve lift events of an internal combustion engine is provided. The system includes a rocker arm and an actuator link with the actuator link arranged to be in constant driving engagement with the rocker arm and a camshaft. A r... | 06/12/2007 |
| 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 |
| 7178508 | Fuel injection nozzle of engine A fuel injection nozzle of an engine used to inject fuel oil into the combustion chamber of each cylinder of a diesel engine and fixedly attached to a cylinder head (1) by a fuel injection nozzle retainer (15) supported by a valve arm shaft (11)... | 02/20/2007 |
| 7171929 | Method to estimate variable valve performance degradation A system comprising of an engine having a first group of cylinders and a second group of cylinders, a first variable valve system in said first group, a second variable valve system in said second group, and a controller for determining degradation of operation of a... | 02/06/2007 |
| 7165391 | Method to reduce engine emissions for an engine capable of multi-stroke operation and having a catalyst A method to control valves in a cylinder operating in a multi-stroke cylinder mode. Valves are controlled to improve engine emissions as operating conditions vary. ... | 01/23/2007 |
| 7152706 | Induction system for a four cycle engine A four cycle engine having at least one cylinder unit is disclosed. The engine includes a continuously variable transmission (CVT) connected to the engine on one side of the engine. An air box is also provided that is located on the same side of the engine as the CV... | 12/26/2006 |
| 7082912 | System and method for controlling engine valve lift and valve opening percentage System and method for controlling internal combustion engine valve lift and valve opening by an arrangement of cams with overlapping cams track that synchronize and vary the rise, fall, and dwell of the inlet and exhaust valves of an IC engine. ... | 08/01/2006 |
| 7080637 | Crankcase having blow-by gas passage and oil drain passage The crankcase of an internal combustion engine includes a blow-by gas passage that is formed inside the crankcase and discharges blow-by gas inside the crankcase to the top of the crankcase. An oil drain passage is also formed inside the crankcase such that it disch... | 07/25/2006 |
| 7059297 | Stop control apparatus for internal combustion engine A stop control apparatus for an internal combustion engine is provided with a valve mechanism capable of operating at least one of an intake valve and an exhaust valve independently a crankshaft of an internal combustion engine, and a valve controlling device for co... | 06/13/2006 |
| 6978748 | Hydraulically controlled actuator for actuating gas exchange valve on the exhaust side of an internal combustion engine A hydraulically controlled actuator for actuation of an exhaust-side gas exchange valve of an internal combustion engine, containing a control piston that is displaceable within a cylinder and, with piston sides facing away from one another, delimits pressure chambe... | 12/27/2005 |
| 6976462 | Double roller cam follower A double roller cam follower includes a longitudinal beam having a first end and a second end, a cam roller rotationally mounted on the beam for engaging a cam lobe and a valve stem roller rotationally mounted on the second end of the beam for engaging a valve stem.... | 12/20/2005 |
| 6964252 | Valve lifter for internal combustion engine A valve lifter is disclosed comprising a lifter housing having a receiver, a switch retainer having at least one bore, and a key disposed in the at least one bore. The key is movable into the receiver to lock the switch retainer against movement relative to the lift... | 11/15/2005 |
| 6953014 | Thermal compensating desmodromic valve actuation system A thermal compensating desmodromic valve actuation system for opening and closing at least one valve of an engine having a cam assemblage and a driving mechanism for reciprocal movement operably connected to said cam assemblage. The cam assemblage includes a cam mec... | 10/11/2005 |
| 6948470 | Four-cycle engine A cylinder block, a cylinder head and a cylinder head cover are stacked in order to form a four-cycle engine. A valve train of a single overhead camshaft (SOHC) type provided with an intake valve and an exhaust valve is provided in the cylinder head. A line extendin... | 09/27/2005 |
| 6892714 | Exhaust gas reflux apparatus for internal combustion engine An exhaust gas reflux apparatus for an internal combustion engine includes one-way connection means provided between an intake rocker arm and an exhaust rocker arm. The one-way connection means moves between a non-operating position where the intake and exhaust rock... | 05/17/2005 |
| 6823661 | Diesel engine exhaust purifying device A device for purifying exhaust gas of a diesel engine equipped with a continuous regeneration type diesel particulate filter arranged in the exhaust gas passage of the engine. The device includes an intake air shutter arranged in the intake air passage of the engine... | 11/30/2004 |
| 6810840 | Internal combustion engine and method for the operation thereof In an internal combustion engine including cylinders with inlet and outlet valves, a first inlet valve drive having a first degree of adjustability for operating an inlet valve of at least one cylinder and a second inlet valve drive having a second degree of adjusta... | 11/02/2004 |
| 6705261 | Multi-valve engine with gas exchange channel between inlet ports An intake valve phase shift in multi-valve engines to enhance air-fuel mixing and optimum combustion at all operating conditions. The intake valve members are independently operated by electro-mechanical actuators or the like, and activated and deactivated by the el... | 03/16/2004 |
| 6701879 | Internal combustion engine An internal combustion engine having at least one combustion cylinder that includes a combustion chamber provided with gas-exchange valves, and an electrohydraulic valve control device having valve actuators that actuate the gas-exchange valves. To reduce... | 03/09/2004 |
| 6659056 | Valve train with a single camshaft A valvetrain with a single camshaft is disclosed. The valvetrain has one or more intake valves, and one or more exhaust valves per cylinder of an engine block. The valvetrain comprises a cylinder head. The valve head of each intake valve is removably seat... | 12/09/2003 |
| 6505589 | Single cam three-valve engine overhead valve train A valve train layout for an overhead valve engine uses a single camshaft actuating two inlet valves and a single exhaust valve. The two inlet valves are preferably aligned on an inner side of a cylinder with the exhaust valve on an outer side. The inlet v... | 01/14/2003 |
| 6502535 | Valve timing and lift control system A variable valve timing and lift control system for an internal combustion engine is provided which comprises a first control mechanism for variably controlling a valve lift and an operation angle of an exhaust valve of the engine, a second control mechan... | 01/07/2003 |
| 6453861 | Valve gear of internal combustion engine In an internal combustion engine, a pair of suction ports are formed on left and right sides of the rear of the cylinder head with respect to the vehicle body. A pair of exhaust ports is formed on left and right sides on the front side of the cylinder hea... | 09/24/2002 |
| 6390869 | Four stroke engine with valve train arrangement A four stroke internal combustion engine includes a cylinder head having a valve train having reduced profile that permits access to a spark plug assembly located therein.... | 05/21/2002 |
| 6390046 | Valve train with a single camshaft A valvetrain with a single camshaft is disclosed. The valvetrain has one or more intake valves, and one or more exhaust valves per cylinder of an engine block. The valvetrain comprises a cylinder head. The valve head of each intake valve is removably seat... | 05/21/2002 |
| 6257187 | Pivot shaft for an internal combustion engine An internal combustion engine includes a housing with a plurality of combustion cylinders. At least one of the combustion cylinders has a longitudinal axis which is disposed at an acute angle relative to a longitudinal axis of at least one other combustio... | 07/10/2001 |
| 6234126 | Engine valve control An engine having a cylinder, piston having a skirt having an actuating member, a upper rocker-arm being pivotally coupled to the intake valve, a first push-rod, said being pivotally coupled to the upper rocker arm, a lower rocker-arm being pivotally conne... | 05/22/2001 |
| 6205966 | Multicylinder internal combustion engine with two inlet valves and two outlet valves The invention relates to a multicylinder internal combustion engine with two inlet valves and two outlet valves (12, 11), the outlet valves (11) being located on one side of an internal combustion engine and the inlet valves (12) being located on the othe... | 03/27/2001 |
| 5960755 | Internal combustion engine with variable camshaft timing and variable duration exhaust event A reciprocating four-stroke internal combustion engine includes a variable exhaust valve operating system for changing the duration of an exhaust valve opening event and also a camshaft drive for rotating a valve operating camshaft and adjusting the rotat... | 10/05/1999 |
| 5884593 | Head and overhead camshaft assembly for an internal combustion engine An overhead cam internal combustion engine having a slanted head design which permits the camshaft assembly comprising a camshaft, rocker arms and valve assemblies to be pre-assembled to the head and valve lash to be set off of the main engine assembly li... | 03/23/1999 |
| 5787849 | Valve timing phase changer A variable phase valve timing assembly for an internal combustion engine. A camshaft driven by a rotating crankshaft of the invention actuates an intermediate member such as a pivotally mounted lever a bucket tappet a first portion of which bears against ... | 08/04/1998 |
| 5706769 | OHC engine A single overhead cam (OHC) engine is provided in which intake and exhaust valves and intake and exhaust cam followers are disposed on opposite sides of a single valve operating cam which is disposed in a cylinder head. The intake and exhaust valves are p... | 01/13/1998 |
| 5690067 | Arrangement for the operation of valves of internal combustion engine In an arrangement for operating the intake and exhaust valves of an internal combustion engine wherein valve actua-ting and coupling levers are pivotally supported in side-by-side relationship on a lever support shaft extending parallel to an overhead cam... | 11/25/1997 |
| 5606943 | Four-cycle engine A gear 11 on a crankshaft 10 is made to engage with an internal gear 21 having twice the number of teeth of the gear 11, cams 22 are formed on the exterior surface of the internal gear 21, and the cams 22 are connected with valve actuating mechanisms 40 f... | 03/04/1997 |
| 5596958 | Rocker arm bridge for internal combustion engines The instant invention is a rocker arm bridge support system for high performance engines. The bridge support system eliminates the compound geometry angular placement of valves with a rigid support structure using a common or segmented shaft for securing ... | 01/28/1997 |
| 5564374 | Cam carrier for an internal combustion engine A small four cycle internal combustion engine is disclosed having a cylinder head assembly which comprises a cylinder head cooperating with a cylinder block of the engine, and a rocker box connected to the cylinder head so as to define an air passage ther... | 10/15/1996 |
