| Entries |
| Document | Title | Date |
|---|
| 20080202456 | ENGINE/VALVETRAIN WITH SHAFT-MOUNTED CAM FOLLOWERS HAVING DUAL INDEPENDENT LASH ADJUSTERS - A multiple cylinder internal combustion engine having a valvetrain with a camshaft disposed within an engine block and at least two valves operated by a common camshaft lobe includes a stationary shaft disposed generally parallel to the camshaft and a cam follower having a first end with an opening pivotally mounted on the stationary shaft, a second end adapted for coupling to at least two pushrods each associated with one of the at least two valves, and a roller mounted on a roller axle disposed generally between the first and second ends, the roller contacting the common camshaft lobe. The cam follower may include independently operable lash adjusters for pushrods driven by a common camshaft lobe. | 08-28-2008 |
| 20080202457 | ENGINE - A simpler configuration of a mechanism for stopping intake/exhaust valves opened/closed by a valve opening/closing mechanism of a rocker arm. An engine E includes an exhaust valve for opening/closing an exhaust port of an exhaust path with a first exhaust valve spring for energizing the exhaust valve in a valve closing direction. An exhaust valve drive cam is rotated in correspondence with the rotation of an engine crankshaft. A rocker arm is swingably provided between the exhaust valve and the exhaust valve drive cam with one end that abuts on the exhaust valve drive cam being pressed according to rotation of the exhaust valve drive cam and swinging to press the exhaust valve by a press member at the other end to move to the open side. An exhaust valve stopping mechanism is provided between the press member of the rocker arm and the exhaust valve. | 08-28-2008 |
| 20080202458 | ENGINE - A valve stopping mechanism wherein when hydraulic fluid pressure is low a cylinder operating state is set and a response of a switch from a cylinder stop state to the cylinder operating state is high. An intake valve and an exhaust valve, a first intake valve spring and a first exhaust valve spring are provided for energizing the valves in the direction of closing the valves, valve drive cams, valve stopping mechanisms, on the basis of a stop hydraulic fluid pressure and energization of plunger springs, for selectively generating valve operating and valve stop states. The valve stopping mechanism generates the operating state when the energizing force of the plunger spring is larger than the press force of the stop hydraulic fluid pressure and generates the stop state when the press force of the stop hydraulic fluid pressure is larger than the energizing force of the plunger spring. | 08-28-2008 |
| 20080202459 | Variable valve mechanism for internal combustion engine - A variable valve mechanism for an internal combustion engine includes a rocker arm, a swing cam, and a transmission member which is interposed between the swing cam and a cam and transmits the displacement of the cam to the swing cam. The rocker arm is provided with a rolling roller member which includes a inner ring, an outer ring, and a plurality of rolling elements accommodated between the inner ring and the outer ring. The outer ring contacts with the swing cam. At least one of a first transmission part, in which the displacement of the cam is transmitted from the cam to the transmission member, and a second transmission part, in which the displacement of the cam is transmitted from the transmission member to the swing cam, includes a sliding roller member, wherein a sliding bearing mechanism is constituted between the sliding roller member and the support part. | 08-28-2008 |
| 20080210181 | Variable valve mechanism of internal combustion engine - When an actuation mechanism fails to operate and thus fails to control a turning of a control shaft of a valve lift varying mechanism, a moving member is enforcedly moved to an intermediate stable position by a biasing force that is produced by combining a first type force that biases the control shaft in a direction to increase a valve lift degree of an engine valve and a second type force that biases the control shaft in a direction to reduce the valve lift degree of the engine valve. The intermediate stable position of the moving member assures an easy engine starting even in a cold engine condition. | 09-04-2008 |
| 20080216781 | DRIVE MOTOR FOR USE IN VARIABLE VALVE OPERATING DEVICE FOR INTERNAL COMBUSTION ENGINE - An actuator of a variable valve operating device includes an electric motor for varying the distance by which an intake valve of an internal combustion engine is lifted. The electric motor has a hollow cylindrical magnet assembly disposed around a hollow cylindrical holder, and a shaft rotatably supported in a housing, with a hollow region being defined between the shaft and the holder. The magnet assembly is skew-magnetized at a predetermined angle to the axis of the magnet assembly. | 09-11-2008 |
| 20080223321 | VARIABLE VALVE ACTUATION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE - A valve system is disclosed for an internal combustion engine which allows a secondary valve event, serving for example to provide internal EGR, to be selectively disabled. The system comprises two valve | 09-18-2008 |
| 20080230022 | Rate limiting and balancing control system for dual independent camshaft phasing - A method for controlling dual independent camshaft phasers in an internal combustion engine. The method has three basic steps: a) first, determining if rate balancing between the two phasers is required; b) second, determining the optimal rate balancing commands; and c) third, applying the determined rate balancing commands to the appropriate phaser(s). In determining the rate balancing commands, there are three possible phaser options: the intake phaser requires priority; the exhaust phaser requires priority; or neither phaser requires priority. Lookup tables are stored in the engine controller for each option. When either phaser has priority, the other phaser is actuated after a delay based upon the position error of the priority phaser, generally at a lower phase rate. When neither phaser has priority, both phasers are actuated at a rate consistent with oil-delivery capabilities of the engine. | 09-25-2008 |
| 20080230023 | Variable valve mechanism - The present invention provides a variable valve mechanism that varies amounts of opening and closing of a valve includes a rotating cam, a rocker arm, two lash adjusters, a hydraulic passage, and a switching mechanism. The rocker arm includes an input member and an output member. The two lash adjusters support the rocker arm so that the rocker arm can rock. The hydraulic passage includes an internal oil passage that is provided in an interior of at least one of the lash adjusters, and an arm oil passage that is provided in an interior of the rocker arm and that is connected from the internal oil passage. The switching mechanism uses a hydraulic pressure in the hydraulic passage to perform a switching between a linked state and a released state, and the switching varies the amounts of the opening and the closing of the valve. | 09-25-2008 |
| 20080236526 | Valve actuating mechanism for an internal combustion engine, and cylinder head incorporating same - A valve actuating mechanism for an internal combustion engine includes a first rocker arm moving mechanism, a second rocker arm moving mechanism, and a trigger arm. The first rocker arm moving mechanism moves left and right rocker arms from a first operation position side to a second operation position side. The second rocker arm moving mechanism moves the left and right rocker arms from the second operation position side to the first operation position side, and the trigger arm selectively restricts the movement of the left and right rocker arms. During engine operation, left and right rocker-side key portions of the left and right rocker arms, respectively, and left and right trigger-side key portions of the trigger arm selectively maintain or remove a restriction on the movement of the left and right rocker arms, in response to a rocking state of the left and right rocker arms. | 10-02-2008 |
| 20080245325 | Internal Combustion Engine Comprising a Variable Valve Drive - The invention relates to an internal combustion engine ( | 10-09-2008 |
| 20080245326 | Switchable Cam Follower of a Valve Train of an Internal Combustion Engine - The invention relates to a switchable cam follower of a valve train of an internal combustion engine, comprising an outer follower and an inner follower interposed between the lateral walls thereof. A roller extends between arms of the inner follower, float-mounted on a pin, as the counter face for an eccentric disk. The followers are disposed on one end on a common axis. On the distal end, they have elongate seats that, at the base of the cam, are mutually aligned. A coupling element is located in the seat of the outer follower and can be displaced step by step into the seat (here follower surface) of the inner follower. The pin on the inner follower slightly projects over the arms of the inner follower with one projection each. When coupled, upper sides of the projections rest against lower sides of stop surfaces that are mounted on the inner surfaces of the lateral walls of the outer follower. | 10-09-2008 |
| 20080245327 | Valve train of an internal combustion engine - The invention proposes a valve train ( | 10-09-2008 |
| 20080257289 | Variable valve actuating apparatus for internal combustion engine - A variable valve actuating apparatus for an internal combustion engine includes an intake valve operating angle varying mechanism, an intake valve timing varying mechanism, and an exhaust valve timing varying mechanism. Before startup of the engine, the intake valve operating angle varying mechanism holds an intake valve operating angle at an intermediate value, the intake valve timing varying mechanism holds intake valve opening and closing timings most advanced, and the exhaust valve timing varying mechanism holds exhaust valve opening and closing timings most retarded. | 10-23-2008 |
| 20080271688 | METHOD AND APPARATUS TO CONTROL TRANSITION BETWEEN HCCI AND SI COMBUSTION IN A DIRECT-INJECTION GASOLINE ENGINE - A method for transitioning operation of a spark-ignition, direct-injection internal combustion engine having a two-step, variable phase valvetrain between HCCI and SI modes includes providing a low-lift intake valve, un-throttled stoichiometric SI operation intermediate a low-lift exhaust and intake valve HCCI mode and a high-lift exhaust and intake valve, un-throttled SI mode. | 11-06-2008 |
| 20080295788 | STROKE ADJUSTING DEVICE FOR VALVES OF A COMBUSTION ENGINE - A device for adjusting the valve lift ( | 12-04-2008 |
| 20080302320 | Variable Valve Operating Device - The present invention relates to a variable valve operating device and makes it possible to reduce the loss in driving force transmission from a camshaft to a valve during a valve lift. | 12-11-2008 |
| 20080314342 | DESMODROMIC VARIABLE VALVE ACTUATION - The combination of the Fully Variable Valve Actuation or FVVA system with the Desmodromic control results in a fully functional FVVA rid of valve springs and any other kind of the restoring springs of the art. | 12-25-2008 |
| 20080314343 | Valve-deactivating hydraulic lifter having a contoured pin housing bottom surface - A valve-deactivation hydraulic valve lifter including a recessed face on the pin housing for making contact with the a crowned surface region of a roller follower. The lifter includes a pin housing that is slidably disposed within an axial bore in a lifter body. Pins for variably locking the pin housing to the lifter body may be disengaged to place the lifter in lost-motion mode by application of engine oil to the outer ends of the pins. A surface of the pin housing, preferably configured as a dished surface, is formed on the bottom end face of the pin housing that approaches the cam-following lifter roller for making contact with the roller follower so as to avoid contacting the roller follower's crowned surface region. | 12-25-2008 |
| 20080314344 | CONTINUOUS VARIABLE VALVE LIFT APPARATUS - A continuous variable valve lift apparatus according to an exemplary embodiment of the present invention includes a camshaft, an input cam disposed to the camshaft, a variable lever that is rotably connected to the camshaft and includes a first arm including a first connecting shaft and a second arm including a second connecting shaft, a first link rotating around the first connecting shaft corresponding to a rotation of the input cam, an output cam rotating around the camshaft, a valve opening/closing portion that is opened and closed corresponding to a rotation of the output cam, and a connecting portion that is disposed for the output cam to rotate corresponding to a rotation of the first link. | 12-25-2008 |
| 20090000581 | Variable valve actuator having self-centering pivotal piston - A variable valve actuator for a power system is provided. The variable valve actuator may have a hydraulic piston extendable to interrupt cyclical movement of an engine valve. The variable valve actuator may also have a pin member pivotally received by the hydraulic piston, and a retaining ring configured to axially align the pin member with the hydraulic piston as the hydraulic piston is retracted. | 01-01-2009 |
| 20090013946 | Variable valve lift device of internal combustion engine - A variable valve lift device of an internal combustion engine is provided in which a first link arm ( | 01-15-2009 |
| 20090025666 | VARIABLE VALVE-OPERATING DEVICE - The rotary motion of a camshaft is transmitted from a first drive cam to a slide surface of a swing cam arm via intermediate members so that the swing cam arm lifts a valve. In this instance, the operating characteristic of the valve changes when the rotation position of a control shaft changes to change the positions of the intermediate members on the slide surface. When the operating characteristic control mode for the valve is to be changed from variable control to fixed control, coupling means couples the swing cam arm and input arm, thereby causing a second drive cam to swing the swing cam arm. The setting for the lift amount of the valve that is obtained when the second drive cam swings the swing cam arm is not smaller than a maximum lift amount setting for a situation where the first drive cam swings the swing cam arm. | 01-29-2009 |
| 20090025667 | VARIABLE VALVE LIFT APPARATUS - A variable valve lift apparatus includes an end lever; a variable lift body connected to the end lever, and rotatable around the end lever, a valve mounted on the variable lift body; and a low lift cam operable to open and close the valve. The variable lift body includes a high lift body, and a low lift body rotatable around the high lift body. A low lift connecting portion selectively connects the low lift body and the high lift body. | 01-29-2009 |
| 20090031971 | CONTINUOUS VARIABLE VALVE LIFT APPARATUS - A continuous variable valve lift apparatus includes an input cam disposed on an input shaft, a valve opening/closing portion, and a rocker arm rotating shaft. A rocker arm rotates around the rocker arm rotating shaft corresponding to a rotation of the input cam. An output cam is disposed at an end of the rocker arm, and opens and closes the valve opening/closing portion. A control portion controls a position of the rocker arm rotating shaft. | 02-05-2009 |
| 20090031972 | Variable Valve Train Apparatus for Internal Combustion Engine - A variable valve train apparatus ( | 02-05-2009 |
| 20090031973 | Engine equipped with adjustable valve timing mechanism - An engine equipped with an adjustable valve timing mechanism includes: an inlet valve opening term varying mechanism, which is included in the adjustable valve timing mechanism, varying an opening term of an inlet valve; and an inlet valve opening term controller controlling the inlet valve opening term varying mechanism according to a running state of the engine, the inlet valve opening term varying mechanism setting the opening term of the inlet valve to an first inlet term while the engine runs at relatively high load and relatively high speed, the inlet valve opening term varying mechanism also setting the opening term of the inlet valve to a second inlet term, termination timing of the inlet valve opening of which is retarded compared to the termination timing of the inlet valve opening in the first inlet term, while the engine runs at relatively low load and relatively low speed. | 02-05-2009 |
| 20090038567 | Variable valve operating device - The present invention relates to a variable valve operating device and makes it possible to inhibit friction during driving force transmission and provide high durability through the use of a compact configuration. | 02-12-2009 |
| 20090050087 | Valve Mechanism for Internal Combustion Engine - Disclosed is a valve mechanism for an internal combustion engine that uses a motor to open/close a valve body of each cylinder. The valve mechanism includes a camshaft that is rotated by the motor and equipped with cams for driving the valve body of a plurality of cylinders; control means that drives the motor while making a mode switch between a normal rotation drive mode in which the camshaft is continuously rotated in one direction to drive the valve body and a swing drive mode in which the camshaft is swung to drive the valve body; and change means that changes the relative angular positions of cylinder-specific cams on the camshaft. | 02-26-2009 |
| 20090056653 | VALVE DRIVE OF AN INTERNAL COMBUSTION ENGINE - A valve drive ( | 03-05-2009 |
| 20090090319 | VARIABLE TAPPET - A variable tappet includes a tappet body; a variable portion in the tappet body, configured to open and close a valve; and a control portion to maintain the variable portion in either a first state, at which it can open and close the valve, and a second state, at which it cannot open and close the valve. | 04-09-2009 |
| 20090090320 | VARIABLE VALVE LIFT APPARATUS - A variable valve lift apparatus according to an exemplary embodiment of the present invention may include an outer part, an inner part disposed in the outer part and connected to a valve, a latching part that is disposed in the outer part and selectively connects the outer part and the inner part, a camshaft supplying torque, a low lift cam that is configured to the camshaft and selectively supplies torque to the inner part, and a high lift cam that is configured to the camshaft and supplies torque to the outer part. | 04-09-2009 |
| 20090095241 | CAM FOLLOWER FOR THE VARIABLE ACTUATION OF A GAS-EXCHANGE VALVE OF AN INTERNAL COMBUSTION ENGINE - The cam follower has a roller, which is movable, between a first axial position and a second axial position and which alternately transmits elevations, which are different from one another. The cam has a cylinder-piston unit, which has a pressure medium space for moving the roller from the first axial position into the second axial position, and a spring means for moving the roller from the second axial position into the first axial position. The piston of the cylinder-piston unit is the roller and the roller has an end wall, which delimits the pressure medium space, and an annular collar which extends from said end wall and whose outer lateral surface serves as a cam pick-off surface. The inner lateral surface of the annular collar surrounds an outer section of the cylinder of the cylinder-piston unit. | 04-16-2009 |
| 20090095242 | Stroke-transmitting device - In a stroke-transmitting device for a variable transmission of an operating stroke to a member to be actuated, specifically a gas exchange valve for an internal combustion engine, including a control unit with first and second control structures, a control cam coupling the first and second control structures and having different control regions which are displaceable for an adjustment of the stroke of the member to be actuated with at least first and second degrees of freedom for controlling the stroke transmitted to the member to be actuated. | 04-16-2009 |
| 20090095243 | Valve-Stroke Controls - A valve-stroke control apparatus continuously varies the stroke of a valve in an engine, and selectively maintains it in a closed position, while the engine is in operation. The control apparatus includes a force-transmitting rod which is pivoted by a cam and a cam-contact roller. An additional roller on one end of said force-transmitting rod engages a transverse contact surface of a stroke-length setting lever. The contact surface has a contour such that pivoting of the force-transmitting rod causes movement between the contact surface and the additional roller, which in turn displaces the force-transmitting rod longitudinally in a direction associated with valve opening. Such displacement is introduced by way of a rotary articulation into a rocking lever that activates the valve. | 04-16-2009 |
| 20090107431 | Variable Valve System For Internal Combustion Engine - The invention relates to a variable valve system for an internal combustion engine including an electric motor that can be rotated in any one of a normal rotation direction and a reverse rotation direction; a first cam that is driven by the electric motor; a second cam that has a same shape as the first cam, that is driven by the electric motor, and that differs from the first cam in a rotation phase; a first valve that is opened and closed by the first cam; a second valve that is opened and closed by the second cam; and a control unit that controls rotation of the electric motor. Each of the first cam and the second cam is symmetric with respect to a straight line passing a cam center and a cam nose. | 04-30-2009 |
| 20090126661 | VARIABLE VALVE LIFT APPARATUS - A variable valve lift apparatus includes a lift body that contacts a cam and a valve. The lift body has a first hole for receiving hydraulic pressure and a second hole for exhausting the hydraulic pressure. A spring is provided in the lift body. A hydraulic pressure supplying portion supplies the hydraulic pressure to the first hole, and a hydraulic pressure exhausting portion receives the hydraulic pressure from the second hole. | 05-21-2009 |
| 20090145382 | Control apparatus for an internal combustion engine and method for controlling the same - In a control apparatus for an internal combustion engine having a valve timing control portion controlling the timing opening and closing of an intake valve disposed in an intake port communicating with a cylinder of the internal combustion engine, when the internal combustion engine is being started from a cold condition, multi-stroke operation is set, in which one combustion cycle of the internal combustion engine includes two or more intake and compression strokes, formed by a first intake stroke and the first compression stroke and a second intake stroke and compression stroke, followed by a combustion stroke and an exhaust stroke. The valve timing control portion controls a lift of the intake valve during the first intake stroke and the first compression stroke to a low lift amount, which is smaller than the normal lift amount required for intake of a requested intake air amount, and controls the lift of the intake valve in a second intake and a second compression stroke to the normal lift amount. | 06-11-2009 |
| 20090145383 | VARIABLE VALVE SYSTEM - A variable valve system includes a camshaft in which a first lobe having a first height and a second lobe having a second height that is higher than the first height from a rotational center axis of the camshaft are formed; a first tappet that corresponds to the first lobe and that has a depression negatively formed in one side thereof; a second tappet corresponding to the second lobe and that is inserted into the depression; at least a pin positioned at the first tappet and fixing a position of the second tappet; and a hydraulic pressure control portion that transfers hydraulic pressure into the depression so as to move the second tappet upwards or downwards and to the pin so as to engage or disengage the first tappet with the second tappet. | 06-11-2009 |
| 20090151674 | CONTINUOUS VARIABLE VALVE LIFT APPARATUS - A valve lift may be continuously varied by an apparatus that includes: an input cam provided on an input shaft; a mediating lever that moves upwards or downwards by the input cam and is formed with an output cam; a valve unit operated by the output cam; and a control device that is coupled to the mediating lever and is capable of changing a contact point between valve unit and the output cam of the mediating lever. | 06-18-2009 |
| 20090151675 | CONTINUOUS VARIABLE VALVE LIFT APPARATUS - A lift of a valve of an engine may continuously be varied by an apparatus that includes: an input cam provided on an input shaft; a pivot shaft provided in parallel with the input shaft; a lever that rotates around the pivot shaft by a rotation of the input cam and operates the valve; and a lift varying device capable of varying a relative distance between the pivot shaft and the input shaft. | 06-18-2009 |
| 20090151676 | VARIABLE VALVE LIFT APPARATUS - A variable valve lift apparatus includes a camshaft with a first cam lobe and a second cam lobe, a cam follower with a first follower contacting the first cam lobe and a second follower contacting the second cam lobe, a connection rotatably connecting the first follower to the second follower, a main body supporting the first follower and the second follower, a connector selectively connecting the first follower and the second follower to the main body, a lost motion elastic member provided on the main body for supplying restoring force to the first follower and the second follower, and a valve configured to be opened and closed by the cam follower. | 06-18-2009 |
| 20090151677 | VARIABLE VALVE LIFT APPARATUS - A variable valve apparatus includes a high lift cam and a low lift cam in parallel with the high lift cam. A tappet body includes a high lift tappet body that constantly contacts the high lift cam, and a low lift tappet body that is disposed in the high lift tappet body and selectively contacts the low lift cam. An inner column is connected with a valve and reciprocally disposed within the low lift tappet body. A supporting member is disposed below the tappet body. A lost motion elastic member is disposed between the supporting member and the tappet body for supplying restoring force to the tappet body. A first connector selectively connects the high lift tappet body and the low lift tappet body. A second connector selectively connects the low lift tappet body and the inner column. | 06-18-2009 |
| 20090151678 | VARIABLE VALVE LIFT APPARATUS - A variable valve lift apparatus may include a camshaft in which a cam is formed co-axially thereon; a variable shaft in which a groove is formed in an exterior circumference at a portion thereof, wherein the variable shaft is disposed in parallel with the camshaft; a variable guide, one end surface of which contacts the cam and the other end surface of which is inserted inside the groove of the variable shaft; a lever through which the variable shaft is rotatably inserted and on which the variable guide is slidably mounted; and a valve that is selectively lifted by the lever, wherein the variable guide selectively is inserted into the groove of the variable shaft to vary lift amount of the valve in accordance with rotation of the variable shaft. | 06-18-2009 |
| 20090151679 | Hydraulic Pressure Control Device of Variable Valve System - A hydraulic pressure control apparatus of a variable valve system may include a variable valve device for controlling lift characteristics of a valve, a hydraulic pressure control pipe in which an slot is formed from the interior toward the exterior and hydraulic pressure is supplied to the inside thereof, and a driving unit for rotating the hydraulic pressure control pipe, wherein the hydraulic pressure is selectively transferred to the variable valve through the slot according to a rotation of the hydraulic pressure control pipe. | 06-18-2009 |
| 20090173296 | APPROACH FOR ADAPTIVE CONTROL OF CAM PROFILE SWITCHING FOR COMBUSTION MODE TRANSITIONS - A method of controlling cylinder valve switching between a first valve condition and a second valve condition for transitioning between combustion modes of an engine. The method includes adjusting timing of a signal to switch between the valve conditions based on an oil degradation condition from an oil sensor, wherein the combustion modes include spark ignition and homogenous charge compression ignition. | 07-09-2009 |
| 20090173297 | Variable valve timing device - The present invention provides a variable valve timing device for an internal combustion engine having a double camshaft. A gas exchange valve control shaft is provided which has first and second concentrically arranged cam shafts that are adjustable in a rotatable manner with respect to each other, by which a cam of the first cam shaft is adjusted in terms of its angle towards a cam of the second cam shaft. A cam phasing device is provided which operates by rotatable vanes provoking a swivelling relative movement between a driven member and an output member. The cam phasing device comprises at least two pivotable vane adjusters. Each pivotable vane adjuster is assigned to one of the two cam shafts. The pivotable vane adjusters are arranged axially one after the other in a direction of a valve control shaft. Each pivotable vane adjuster may be designed as a rotor-type vane adjuster. | 07-09-2009 |
| 20090178634 | ENGINE WITH VARIABLE VALVE ACTUATING MECHANISM - An internal combustion engine is described having a valve mechanism that comprises an SCP camshaft operating two sets of valves. The first set of valves is operated via a summation rocker system such that the valve lift characteristic results from the combination of two cam profiles. The second set of valves has a valve lift characteristic that is different from that of the first set. In the invention, changing the valve lift characteristic of the first set of valves by varying the phase of the inner shaft of the SCP camshaft relative to the outer tube of the SCP camshaft serves additionally to alter the operation of the second set of valves. | 07-16-2009 |
| 20090183703 | Continuous Variable Valve Lift Apparatus - The present invention relates to a continuously variable valve lift apparatus that includes an output cam driving unit for transmitting a rotation, an output cam that receives the rotation from the output cam driving unit and rotates about an axis at a predetermined angle, an output cam position controlling unit for controlling the axis of rotation of the output cam, and a valve opening unit that is operated by the output cam. | 07-23-2009 |
| 20090188454 | VARIABLE VALVE ACTUATION APPARATUS OF INTERNAL COMBUSTION ENGINE - A variable valve actuation apparatus of an internal combustion engine has a multinodular-link motion converter, to vary at least a working angle. A position of rotation of a control shaft, variably adjusting the attitude of the motion converter, is set, so that, at a peak lift during a valve opening period, an angle γ | 07-30-2009 |
| 20090194048 | Adjusting Device for Variable Valve Control - Disclosed is an adjusting mechanism for rotating the adjusting shaft of a variable valve control device for combustion engines, in which the crank of a crank-rocker mechanism or slider-crank mechanism is mounted on the camshaft and in which the rocker of the crank-rocker mechanism or the slider of the slider-crank mechanism can entrain the adjusting shaft in the desired direction of rotation by means of switchable freewheels. | 08-06-2009 |
| 20090205597 | VARIABLE VALVE DEVICE FOR ENGINE - A variable valve device is constructed to prevent inclination of a sliding surface of a high speed rocker arm. In an engagement surface where a connecting pin and the engagement portion of a high speed rocker arm are in contact, the center of the width of the surface in the direction of the cam shaft is provided closer to the high speed rocker arm than the center of the width in the direction of the camshaft of a cam contact surface where the high speed cam and the sliding surface of the high speed rocker arm are in contact. The low speed rocker arm includes a cam receiver and a connecting portion. The width of the connecting portion is larger than that of the cam receiver. The side surface of the connecting portion projects beyond the side surface of the cam receiver. The high speed rocker arm includes a cam receiver and a connecting portion. The side surface of the connecting portion and the side surface of the connecting portion are provided in the cam contact surface and within the width of the surface in the direction of the camshaft. | 08-20-2009 |
| 20090205598 | ENGINE HAVING VARIABLE VALVE MECHANISM - An engine having a variable valve mechanism arranged to switch a lift degree of a valve between a low speed state and a high speed state includes a cam carrier defined by a cam bearing portion, a rocker shaft support, and a hydraulic cylinder support. The cam bearing portion is provided on a line passing through the bore center of a cylinder in a plane perpendicular or substantially perpendicular to the camshaft. The low speed rocker arm swings in response to the low speed cam of the camshaft. The high speed rocker arm swings in response to the high speed cam of the camshaft. The low speed rocker arm includes a through hole. A connecting pin is slidably inserted into the through hole and urged toward the hydraulic cylinder support. A hydraulic cylinder is provided in the hydraulic cylinder support. The hydraulic piston is slidably inserted into the hydraulic cylinder and abutted against the connecting pin. The high speed rocker arm includes an engagement portion that is engaged with the connecting pin projecting from the through hole. The engine has a camshaft having high supporting rigidity and a variable valve mechanism that can easily be assembled. | 08-20-2009 |
| 20090211548 | VARIABLE VALVE DEVICE FOR ENGINE - A variable valve device, which is capable of automatically canceling a deviation in the relationship between the rotation angle of a control shaft and the lift degree generated because of the disassembling and assembling of an engine, includes a target lift degree calculator that calculates a target lift degree, a motor driver that drives a brushless DC motor that rotates the control shaft until the lift degree reaches the target lift degree, and an automatic deviation canceller that automatically cancels the deviation. More specifically, the magnetic pole pulse pattern of the motor before the engine starts is obtained and it is determined whether the pattern match magnetic pole pulse pattern stored before the engine stops. If they do not match, an idle lift degree is set, the idle lift degree is changed so that the engine speed is within the tolerance range of an idle engine speed, the rotation angle for the idle portion is subtracted from the obtained angle of the control shaft and a reference angle is updated by the difference. | 08-27-2009 |
| 20090217895 | Inner arm stop for a switchable rocker arm - A roller finger follower assembly for variably activating a valve in an internal combustion engine includes at least one vertical recessed channel formed inside an outer arm and a shaft. The channel includes a machined upper surface closing the channel. The shaft engages with the recessed channel, the shaft reciprocates within the recessed channel, and the upper surface stops an upward movement of the shaft. | 09-03-2009 |
| 20090241874 | VARIABLE VALVE ACTUATOR - A variable valve actuator presses rocker arms using force transmitted from a drive cam to open/close valves of an engine, and includes a swing arm, which is pivotably coupled to the engine on a first side thereof, and at least two pressing means, which come into contact with the rocker arms on first sides thereof, are pivotably coupled to a second side of a swing arm on second sides thereof, and press the rocker arms when pressed by the drive cam. Thereby, the variable valve actuator can adjust a lift time and a lift distance of each valve without changing positions of the drive cams and the camshaft, and more easily adjust the lift time of each valve, and have very excellent applicability to the engine due to simple internal configuration. | 10-01-2009 |
| 20090255496 | CONTINUOUS VARIABLE VALVE LIFT DEVICE - A continuous variable valve lift device includes a valve, which opens/closes a channel by means of reciprocation, a control shaft, which is mounted so as to be able to move toward or away from a reciprocation central axis of the valve, a pivotable shoe, which is pivotably coupled to the control shaft, includes a cam insertion part in a recess or through-hole shape and a slide face slidably contacting an end of the valve, and reciprocates the valve when pivoted, and a drive cam, which comes into contact with an inner wall of the cam insertion part, and pivots the pivotable shoe. Thereby, the continuous variable valve lift device can freely adjust a lift amount and a lift time of the valve without changing positions of the drive cam and camshaft, and thus be easily applied to an existing engine. | 10-15-2009 |
| 20090266320 | VALVE ACTUATING SYSTEM - An actuating system for a gas exchange valve of an internal combustion engine is described which comprises two cams ( | 10-29-2009 |
| 20090266321 | Valve system for internal combustion engine - A variable valve system includes a transmission mechanism T which transmits a valve actuating force to an inlet valve | 10-29-2009 |
| 20090272345 | CONTINUOUS VARIABLE VALVE LIFT APPARATUS - A continuously variable valve lift apparatus includes an input cam disposed to a camshaft and rotating, a follower supporting portion rotatably disposed to the camshaft for changing a relative angle of the follower with respect to the camshaft, a follower that includes a center shaft, is connected with the follower supporting portion via the center shaft, and pivots around the center shaft by receiving rotation movement of the input cam, a straight line guide, an output cam that contacts the follower and reciprocates along the straight line guide, and a valve opening unit that is opened by pushing of the output cam. | 11-05-2009 |
| 20090272346 | CONTINUOUS VARIABLE VALVE LIFT APPARATUS - A continuously variable valve lift apparatus may include an input unit, a camshaft for receiving rotation from the input unit, wherein one end portion of the camshaft is slidably coupled to the input unit in a longitudinal direction of the camshaft, a controlling unit for controlling a relative position of the camshaft in the longitudinal direction of the camshaft, a slanted cam disposed to the camshaft and a cross-section of which is slanted with a predetermined angle with respect to a longitudinal axis of the camshaft, a mediating unit slanted with substantially the same angle of the slanted cam and pivoting in response to rotation of the slanted cam, and a valve opening unit that is opened/closed in response to the pivoting motion of the mediating unit. | 11-05-2009 |
| 20090277408 | Variable valve operating device and valve opening amount adjustment method - The present invention relates to a variable valve operating device and a valve opening amount adjustment method, and can accurately control the amount of in-cylinder air and the strength of a swirl flow. The variable valve operating device according to the present invention includes a valve mechanism that can select a dual valve variable control mode in which the valve opening amounts of a first valve and a second valve, which are of the same type and provided for the same cylinder, can be varied continuously or in multiple steps. A valve opening amount difference is provided when the valve opening amounts are minimized in the dual valve variable control mode so that the valve opening amount of the first valve is larger than that of the second valve. In addition, adjustments are made so that the minimum valve opening amount of the first valve does not vary from one cylinder to another. | 11-12-2009 |
| 20090288622 | CONTINUOUS VARIABLE VALVE LIFT DEVICE - The CVVL device includes a rocking cam having a rolling face contacting a rocker arm is formed to press the rocker arm when pivoted, a rocking roller, which is disposed above the drive cam and rolls on an outer circumference of the drive cam, a control apparatus, which changes a position of the rocking roller rolling on the outer circumference of the drive cam; and a rocking apparatus, which pivots the rocking cam according to a position of the rocking roller such that a position where the rocker arm is contacted with the rolling face is changed depending on the position of the rocking roller. | 11-26-2009 |
| 20090288623 | Continuously variable valve lift system for engines and controllling method thereof - The present invention relates to a continuously variable valve lift system for engines, which can prevent deterioration of fuel efficiency due to a friction loss by a return spring even in a low lift operation state by making a high lift swing angle be larger than a low lift swing angle, easily implement the CVVL by reducing a lost motion angle to an optimum condition, and securely generate an advancing effect in spite of reduction of the lost motion angle. Further, the continuously variable valve lift system is easy and convenient to adjust a clearance of an oscillating cam link, prevent the clearance of the oscillating cam link from being accumulated, and has a convenience of workability in adjusting the clearance in a narrow engine room. | 11-26-2009 |
| 20090293824 | Continuously Variable Valve Lift System for Engine - A continuously variable valve lift system for an engine may include a driving cam fixed to a camshaft, a control shaft disposed in parallel to the camshaft with a predetermined distance, an upper rocker arm, one end of which is rotatably coupled to the control shaft and the other end of which is slidably contacted to and rotated by the driving cam, lower rocker arm that is selectively pushed by the upper rocker arm and selectively pushes a valve, rocker arm follower slidably coupled to the lower rocker arm and contacting the upper rocker arm, wherein the rocker arm follower transmits an operational force of the upper rocker arm to the lower rocker arm, and a variable mechanism that changes contact point of the rocker arm follower and the upper rocker arm according to rotation of the control shaft. | 12-03-2009 |
| 20090320778 | COUPLING DEVICE OF A SWITCHABLE CAM FOLLOWER OF A VALVE TRAIN OF AN INTERNAL COMBUSTION ENGINE - A coupling device ( | 12-31-2009 |
| 20100018484 | Slide Type Continuous Variable Valve Lift Device - A slide type continuous variable valve lift (CVVL) device includes a swing arm rotating to press a valve; a cam lobe; a roller transmitting a driving force of the cam lobe to the swing arm; and a guide guiding the roller to move along a predetermined path. The CVVL device generally can minimize the number of places where sliding friction between respective parts may occur to minimize power loss and enable more precise operation control, reduce the number of parts to enhance the overall robustness of the device, and advance the time of maximum valve opening to improve the fuel efficiency of an engine. | 01-28-2010 |
| 20100024753 | Variable valve mechanism - The present invention provides a variable valve mechanism which includes a camshaft having a drive cam, a rocker shaft provided parallel to the camshaft, and a variable mechanism that is provided on the rocker shaft and interposed between the drive cam and a valve, and that changes an opening/closing amount of the valve. The variable mechanism includes a main arm that engages with the drive cam, a cam arm that has a cam surface pressing the valve, a control cam that is provided on the rocker shaft, and has an outer peripheral surface whose distance from a shaft center of the rocker shaft varies gradually, and a displacement member whose distance from the shaft center is changed by turning of the control cam. A relative phase between the main arm and the cam arm is displaced as the distance between the displacement member and the shaft center changes. | 02-04-2010 |
| 20100059005 | Method and apparatus for adjusting variable valve lift - An apparatus for adjusting individual valve lift comprising a control arm assembly disposed between the cam lobes and the valve rockers for a multi-valve train. The control arm at each valve includes a driven gear. An actuator shaft includes a mating drive gear at each driven gear for rotating each control arm to vary the overall lift of the valves. In the prior art, the mating drive gears are fixed to the actuator shaft at identical fixed orientations. In accordance with the present invention, each mating drive gear is rotatably adjustable on the actuator shaft to permit changing of the orientation of each gear with respect to the actuator shaft, thereby changing the contact point of the control arm with its respective cam lobe. The lifts of the individual valves may be individually adjusted to provide equal air flow through all the valves in a multi-valve train. | 03-11-2010 |
| 20100064993 | INTERNAL COMBUSTION ENGINE - An internal combustion engine includes: a variable valve train mechanism, configured to receive a cam displacement of an inlet cam so as to vary a driving output for driving an inlet valve continuously from a maximum valve lift to a minimum valve lift so as to match the driving output with a running condition of the internal combustion engine; and a control part, configured to control the variable valve train mechanism so as to set a valve lift of the inlet valve to a starter valve lift when starting the internal combustion engine in a cold state. The starter valve lift is formed so that a valve opening period of the inlet valve is set to encompass an overall area of an induction stroke period of the internal combustion engine from a top dead center to a bottom dead center of the induction stroke period. | 03-18-2010 |
| 20100064994 | INTERNAL-COMBUSTION ENGINE OF THE TYPE WITH AT LEAST ONE CYLINDER WORKING IN DEGRADED MODE - The present invention relates to an internal-combustion engine comprising at least one cylinder ( | 03-18-2010 |
| 20100071644 | CONTROL DEVICE FOR VARIABLE VALVE MECHANISM - A brushless motor of a variable valve mechanism varies a actuation parameter of an intake valve of an engine. A position sensor outputs a pulse signal when the brushless motor rotates. A position counter calculates a counter value by counting edges of the pulse signal. A motor control device obtains a detection value of a motor rotational angle based on the counter value when the motor control device is in a powered state. An engine control device determines that the detection value of the motor rotational angle is displaced from the actual value when the engine control device detects that the engine is operating and the motor control device portion is in a non-powered state. | 03-25-2010 |
| 20100071645 | Continuous variable valve lift apparatus - A continuously variable valve lift apparatus includes an input cam disposed on an input shaft, a valve opening unit, a control shaft disposed in parallel with the input shaft, a variable member that contacts the input cam, wherein a relative distance between a contact portion of the variable member and the input cam, and the control shaft is variable according to relative angel changes between the variable member and the control shaft, a driving unit that is connected with the variable member and pivots around the control shaft and a driving cam that is disposed between the driving unit and the valve opening unit and drives the valve opening unit according to the pivoting of the driving unit. | 03-25-2010 |
| 20100077974 | CONTINUOUSLY VARIABLE VALVE LIFT DEVICE AND OPERATION LOGIC THEREOF - A continuously variable valve lift device may include a vibration link having one end eccentrically and rotatably coupled to a rotation shaft, a rocker arm having a middle portion pivotally coupled to the other end of the vibration link, an advance lever having one end coupled to the one end of the rocker arm to select advance or delay, a swivel cam link having one end pivotally coupled to the other end of the rocker arm, and a swivel cam, one end of which is pivotally coupled to the other end of the swivel cam link and the other end of which is pivotally coupled to a stationary shaft to open and close a valve. | 04-01-2010 |
| 20100077975 | SWITCHABLE CUP TAPPET - A switchable bucket tappet for a valve drive of an internal combustion engine, which has a bucket basic body with a ring-like base. A hollow-cylindrical projection protrudes from an inner edge of the base, and in the bore of the projection an inner body extends. Two coupler pistons lie opposite one another and, to achieve a full valve stroke, engage in sections with a driver surface of the bucket basic body which run in a radial hole of the inner body. A zero valve stroke is achieved when the coupler piston is displaced completely into the radial hole of the inner body, which is baseless and free of contact with a cam. The projection has a window-like aperture, with the underside acting as the driver surface for an upper side of the coupler piston during coupling. The region of the base is an approximately symmetrical and continuously thin-walled formation. | 04-01-2010 |
| 20100077976 | Internal combustion engine with variable valve control system - An internal combustion engine is equipped with a variable valve control system which is operable to selectively actuate an engine valve using one of two cams of a camshaft, by sliding a rocker arm in the axial direction of a rocker-arm shaft. The system is capable of restricting the axial-direction movement of the rocker arm within a predetermined range, using a simple structure without unduly increasing the number of component parts. Position-restriction portions are formed in a rocker arm, and abut on a trigger arm to restrict sliding movement of the rocker arm within a predetermined amount, when the trigger arm is disengaged from the rocker arm. | 04-01-2010 |
| 20100077977 | Internal combustion engine equipped with a variable valve control system - The invention provides an internal combustion engine equipped with a variable valve control system which switches the actions of an engine valve by sliding a rocker arm in the axial direction of the rocker arm shaft, while enabling the restriction on the sliding movement of the rocker arm to be removed in accordance with the timings of the actions of the rocker arms irrespective of the engine speed. The internal combustion engine includes an actuator that moves a rocker arm shaft in its axial direction, a trigger arm that engages with a rocker arm to prohibit the sliding movement of the rocker arm, and a trigger pin which is configured to be activated by an axial movement of the rocker arm shaft to bring the trigger arm into action, and to disengage the trigger arm from the rocker arm. | 04-01-2010 |
| 20100077978 | Internal combustion engine having a hydraulically-actuated variable valve control system, and motorcycle incorporating same - An internal combustion engine is equipped with a variable valve controlling system, in which the single actuator is disposed in a cylinder head on one side where one ends of the rocker-arm shafts are disposed, while enabling the single actuator to activate the rocker arms irrespective of the arrangement of the rocker-arm shafts. In the internal combustion engine, a hydraulic cylinder of a hydraulic actuator is disposed so as to transverse a timing chamber. Operation elements extend respectively from sidewalls of a plunger in the hydraulic cylinder, and activate respective rocker-arm shafts. In a motorcycle on which the engine is mounted, a frame member of a vehicle frame is disposed outside the hydraulic actuator. | 04-01-2010 |
| 20100077979 | Internal combustion engine having a variable valve control system, and method of using same - An internal combustion engine includes a variable valve control system which is operable to switch actions of an engine valve by slidably moving a rocker arm in the axial direction of a rocker-arm shaft, and which is capable of removing a restriction on the sliding movement of the rocker arm at accurate timings while employing a simplified configuration. When a trigger arm swings by a predetermined amount to the opposite side of a rocker arm, a left-hand engagement nail in engagement with an engagement groove disengages from the engagement groove, but a right-hand engagement nail still engages with an engagement groove. The left-hand engagement nail is placed on top of a left-hand deck-like portion. After that, when an action of the rocker arm makes the trigger arm further swing to the opposite side of the rocker arm, the right-hand engagement nail disengages from the engagement groove. | 04-01-2010 |
| 20100083923 | VALVE OPERATING DEVICE FOR INTERNAL COMBUSTION ENGINE - A valve operating device ( | 04-08-2010 |
| 20100089348 | Variable Valve Apparatus | 04-15-2010 |
| 20100095918 | LIFT-CONTROL DEVICE FOR A POPPET VALVE OF AN INTERNAL-COMBUSTION ENGINE OR OPERATING MACHINE - A lift-control device for a poppet valve of an internal-combustion engine including a first valve-lift means, a second valve-lift means, and a means for selective de-activation of the second valve-lift means. In an embodiment, the first valve-lift means is configured to define a first valve-lift law and is operatively connected with a rocker that acts on a stem of said valve to move said stem according to the first valve-lift law; and the second valve-lift means is configured to define a second valve-lift law and is operatively connected with the rocker. In an embodiment, the first valve-lift means comprises a profile of a cam or eccentric acting on the rocker to cause it to oscillate about a first axis so as to move the valve stem according to the first valve-lift law; and the second valve-lift means comprises an auxiliary rocker that co-operates in contact with the first valve-lift means. | 04-22-2010 |
| 20100122677 | Continuous variable valve lift apparatus - A variable valve lift apparatus may include an input unit, a control link disposed to a control shaft, a driving cam that is provided with a contact portion and pivotally disposed to the control shaft, a valve opening unit that contacts the contact portion and is opened and closed in accordance with pivoting of the driving cam, wherein the control link, the input unit and the driving cam are connected by a connecting unit, and contact positions of the valve opening unit and the contact portion are variable according to a relative rotation angle of the control link around the control shaft. | 05-20-2010 |
| 20100122678 | VALVE DRIVING APPARATUS - Disclosed herein is a valve driving apparatus. The valve driving apparatus includes at least one swing arm having one side corresponding to an upper side of a valve opening and closing a combustion chamber of an internal combustion engine; and a cam unit periodically pivoting the swing arm. Here, the swing arm performs a swing motion on the other side thereof by external manipulation to periodically compress the valve. The valve driving apparatus is capable of adjusting lift amounts of valves opening and closing a combustion chamber of an internal combustion engine. | 05-20-2010 |
| 20100126444 | SYSTEM AND METHOD FOR VARYING A DURATION OF A CLOSING PHASE OF AN INTAKE VALVE OF AN ENGINE - A system is provided for varying a duration of a closing phase of an intake valve of an engine. The system includes a tappet assembly coupled to the intake valve, where the tappet assembly includes a first tappet body and a second tappet body within a guide housing. The system also includes a cam coupled to the main shaft. The cam engages the tappet assembly to initiate the relative oscillation of the first tappet body to the second tappet body. The system also includes a hydraulic piston positioned within the guide housing and coupled to the first tappet body. The hydraulic piston selectively varies a duration of the relative oscillation of the first tappet body to the second tappet body based upon a parameter of a hydraulic fluid supplied to the hydraulic piston, to selectively vary the duration of the closing phase of the intake valve. | 05-27-2010 |
| 20100126445 | DEVICE FOR CAMSHAFT ADJUSTMENT IN AN INTERNAL COMBUSTION ENGINE - The invention relates to a device for camshaft adjustment in an internal combustion engine, having a lifting profile element which is provided in a rotationally fixed manner on an axially movable mounted camshaft and which provides a control groove, and having a control unit for generating a predetermined axial movement of the camshaft, wherein the control unit has a tappet unit which is preferably movable radially with respect to the camshaft and which is designed to controllably engage into the lifting profile element, wherein the lifting profile element forms a first control groove which is designed to interact with the tappet unit at a first penetration depth in order to describe a first axial movement of the camshaft, and the lifting profile element forms a second control groove which is designed to interact with the tappet unit at a second penetration depth, which differs from the first penetration depth, in order to describe a second axial movement, which differs from the first axial movement, of the camshaft. | 05-27-2010 |
| 20100126446 | VARIABLE VALVE APPARATUS - A drive cam opens or closes an intake valve via a variable mechanism, a split-type rocking cam arm, and a valve actuating mechanism. The variable mechanism varies a position of an intermediate roller corresponding to a rotating angle of a control shaft, thereby variably setting a lift amount of the intake valve. The split-type rocking cam arm includes an input arm and an output arm, and a connection selection mechanism is disposed between the arms. When the arms are connected together, the intake valve performs an ordinary open/close operation. When the arms are disconnected, an input of the drive cam is absorbed by a relative rocking motion between the arms, so that the intake valve is retained in a pause state. | 05-27-2010 |
| 20100132641 | AUXILIARY-DEVICE ARRANGEMENT FOR CYLINDER-DEACTIVATION MULTI-CYLINDER INTERNAL COMBUSTION ENGINE AND CYLINDER-DEACTIVATION MULTI-CYLINDER INTERNAL COMBUSTION ENGINE - An auxiliary-device arrangement for a cylinder-deactivation multi-cylinder internal combustion engine includes an auxiliary-device driving member and an auxiliary device. The cylinder-deactivation multi-cylinder internal combustion engine is capable of deactivating at least one deactivated cylinder by keeping an intake valve and an exhaust valve closed while at least one operating cylinder is operating. The auxiliary-device driving member is provided adjacent to an operating cam of a valve operating cam shaft which is provided in the at least one operating cylinder. The auxiliary device has an operating member via which the auxiliary device contacts the auxiliary-device driving member. | 06-03-2010 |
| 20100139587 | Continuously Variable Valve Actuation System - A continuously variable valve actuation (CVVA) system may include a driving cam firmly fixed to a crank shaft and rotated by a driving force of the crank shaft, a driven cam configured to rotatably contact the driving cam, wherein the driven cam is selectively pressed by the driving cam to rotate around one end thereof serving as a rotational axle and has a cam face at the other end thereof so as to press and open a valve when pressed, and a swing arm, one end of which is pivotally coupled to a stationary member and the other end of which is coupled to the one end of the driven cam to be rotated around the rotational axle of the swing arm. | 06-10-2010 |
| 20100139588 | Continuously Variable Valve Lift Apparatus - A continuously variable valve lift apparatus may include a control shaft, a camshaft in which a cam is formed thereto, an eccentric member connected to the control shaft, a follower slidably contacting the cam, a follower arm that is extended from a follower ring mounted around the eccentric member, a variable ring slidably mounted on the eccentric member and a variable arm extended from the variable ring, an output ring slidably mounted on the control shaft and an output arm extended from the output ring, wherein an output cam is integrally formed to the output arm and an end portion of the output cam is pivotally coupled to one end portion of the output arm, a first link pivotally connecting the follower arm and the variable arm, and a second link pivotally connecting the variable arm and the output arm. | 06-10-2010 |
| 20100139589 | Variable Valve Lift Apparatus - A variable valve lift apparatus may include an inner body of which an end is pivotally connected to an anchor, an outer body of which an end is pivotally connected to the anchor, a roller finger follower of which an end is pivotally connected to a hydraulic lash adjuster, wherein a portion of the roller finger follower is pivotally connected to the outer body, a valve disposed to the other end of the roller finger follower, and a connecting unit selectively connecting the inner body and the outer body. | 06-10-2010 |
| 20100139590 | Apparatus for Adjusting Deviation of Engine and Continuously Variable Valve Lift Device Including the Same - An apparatus for adjusting deviation of an engine and a continuously variable valve lift device including the same are provided. The apparatus for adjusting deviation of an engine includes an adjustment member connecting a rocker arm to plural output cams, respectively, to adjust lengths between the rocker arm and the output cams, respectively, so that the lengths become equal to or different from each other. The continuously variable valve lift device includes an eccentric cam shaft with eccentric cams installed on its outer periphery, a rocker arm rotatably installed on the eccentric cams to interlock with plural output cams, and apparatus for adjusting deviation provided on the rocker arm to adjust lengths between the rocker arm and the output cams so that the lengths become equal to or different from each other. | 06-10-2010 |
| 20100139591 | VARIABLE VALVE DEVICE OF INTERNAL COMBUSTION ENGINE AND CONTROLLER THEREFOR - A controller of a variable valve device is configured to, before starting an internal combustion engine, set an operation angle varying mechanism to control an intake valve of the engine to have such an operation angle as to retard a valve close timing of the intake valve relative to a piston bottom dead center; define a given period from a instruction time when an instruction signal is fed to the controller for starting the engine to a time when a combustion of air/fuel mixture is actually commenced in the engine; and when, in the given period, a temperature representing the temperature of the engine is lower than a predetermined temperature, reduce the operation angle of the intake valve so as to bring the valve close timing of the intake valve near to the piston bottom dead center. | 06-10-2010 |
| 20100154731 | Continuously Variable Valve Actuation System - A continuously variable valve actuation (CVVA) system may include a driving cam rotated by a driving force transmitted from a crankshaft, and a driven cam pressed by the driving cam to be rotated around a first end thereof serving as a rotational axle of the driven cam, wherein the driven cam has a cam face at a second end thereof so as to press and open a valve when rotated, and wherein a vertical distance between the rotational axis of the first end of the driven cam and a rotational axis of the driving cam is configured to be adjusted by moving a position of the rotational axis of the first end of the driven cam. | 06-24-2010 |
| 20100162978 | DESMODROMIC VARIABLE VALVE ACTUATION - A mechanical desmodromic fully variable valve actuation system capable for racing revs. Valve lift and valve duration continuously variable from a maximum to zero. Independently variable valve duration and valve lift. | 07-01-2010 |
| 20100170460 | ENGINE VALVE DURATION CONTROL - Systems and methods for controlling air flow in an engine including a turbocharger are provided. One example method includes during a first operating range, operating the engine with a first exhaust valve duration at a first exhaust valve timing, during a second operating range, operating the engine with a second exhaust valve duration at a second timing, and during a third operating range, operating the engine with the first exhaust valve duration at a third timing, where engine load of the second operating range is higher than engine load of the first operating range, which in turn is higher than engine load of the third operating range, and where the first exhaust valve duration is longer than the second exhaust valve duration, and where the first timing is retarded to a greater extent than either of the second and third timings. | 07-08-2010 |
| 20100186693 | INTERNAL COMBUSTION ENGINE VALVE MECHANISM - An internal combustion engine valve mechanism including a rocker arm, which includes a bearing section and a rocker roller, and an HLA. The HLA has a pivot, which is to be inserted into the bearing section, and supports one end of the rocker arm. The pivot has a spherically curved surface, whereas the bearing section has a shell-shaped dent. A swing arm rotates in synchronism with camshaft rotation and gives roller pressure force to the rocker roller. The direction in which the swing arm presses the rocker roller shifts toward the HLA when the lift of a valve disc increases. An osculating circle is inclined by inclining the axis of the bearing section at an angle of α° relative to the axis of the HLA. | 07-29-2010 |
| 20100186694 | ENGINE INCLUDING CYLINDER DEACTIVATION ASSEMBLY AND METHOD OF CONTROL - A method is provided for operating an engine assembly having a hydraulically actuated component. The method may include providing pressurized oil from a pressurized oil source to an oil passage in communication with the hydraulically actuated component and determining a first oil pressure measurement within the oil passage a first predetermined time after the providing. The method may further include preventing operation of the hydraulically actuated component when the first oil pressure measurement is below a first predetermined limit, isolating the oil passage from the pressurized oil source after the providing, and determining a second oil pressure measurement within the oil passage a second predetermined time after the isolating when the first oil pressure measurement is above the first predetermined limit. Operation of the hydraulically actuated component may be prevented when the second oil pressure measurement is above a second predetermined limit. | 07-29-2010 |
| 20100186695 | VARIABLE VALVE ACTUATION APPARATUS OF INTERNAL COMBUSTION ENGINE - In a variable valve actuation apparatus of an internal combustion engine configured to variably control at least a working angle of an engine valve, a valve actuation mechanism is configured to control a valve acceleration characteristic of the engine valve depending on an engine operating condition. The valve actuation mechanism is configured to bring about a first state where a maximum positive valve-closing acceleration of the engine valve becomes less than a maximum positive valve-opening acceleration of the engine valve, at a maximum working angle. The valve actuation mechanism is further configured so that a second state where the maximum positive valve-opening acceleration of the engine valve becomes less than the maximum positive valve-closing acceleration of the engine valve, exists at a working angle less than the maximum working angle. | 07-29-2010 |
| 20100186696 | OIL CONTROL VALVE ASSEMBLY FOR ENGINE CAM SWITCHING - An oil control valve assembly for an engine is provided that has a control valve with a valve body, and a manifold that defines a control passage in fluid communication with a valve lift switching component and an exhaust passage for exhausting fluid from the valve. The control valve is controllable to selectively direct fluid from a supply source to the control passage to actuate the valve lift switching component. An elongated tubular member is positioned adjacent the engine component and is operatively connected to the exhaust passage such that fluid flows from the exhaust passage to the elongated tubular member and through the elongated tubular member onto the engine component. | 07-29-2010 |
| 20100192884 | Guide Systems for Variable Valve Controller - A variable valve control apparatus includes an oscillating arm and a pivot lever pivotably mounted to each other via a swivel joint. A first roller, which is rotatably mounted on an arm of the pivot lever engages with the camming surface of a cam, while a second roller which is rotatably mounted on another arm of the pivot lever makes contact with a contact surface of an arcuate sliding block disposed within a housing of the valve control apparatus. The contact surface of the sliding block includes a first region which has an arcuate contour, and a radius that is centered on a pivot axis of the swivel joint when the valve is in the closed position, as well as a second region which adjoins the first region and has a curved spur that extends inwardly toward the swivel joint. The sliding block is slidable along an arcuate path between a first position in which the second roller engages the first region of the contact surface and a second position in which it engages the second region of the contact surface, so that, when the sliding block is in the first position, the pivot joint remains stationary, and the valve remains closed. When the sliding block is in the second position, the second roller engages with the spur, so that camming movement of the first roller actuates the valve to an open position. | 08-05-2010 |
| 20100206254 | Variable valve activation system for internal combustion engine - Variable valve activation system for internal combustion engines includes a first arm, a link mechanism, a swing cam, and a variable mechanism, which continuously varies lift amount of an engine valve. The link mechanism includes a second arm rotatably linked with the first arm for transmitting the movement of the first arm to the swing cam. The variable mechanism includes a first gear provided concentrically with a swing shaft of the first arm and a second gear provided to the second arm concentrically with the link pin so as to engage with the first gear. The rotation of the first gear causes the second arm to swing and varies the swing position of the swing cam with respect to the engine valve, and in a state the first gear is in a halt or stopped position, the first arm causes the second arm to swing in a swing direction of the first arm. | 08-19-2010 |
| 20100212614 | INTERNAL COMBUSTION ENGINE WITH VARIABLE VALVE GEAR - In an internal combustion engine with a variable valve gear, which comprises a first intake valve and a second intake valve for each cylinder, configured to be driven by a first intake cam and a second intake cam, respectively, and a cam phase change mechanism configured to vary at least the phase of the second intake cam, the second intake cam is set so that the open period of the second intake valve is longer than that of the first intake valve. | 08-26-2010 |
| 20100224152 | HYDRAULIC UNIT FOR A CYLINDER HEAD OF AN INTERNAL COMBUSTION ENGINE WITH HYDRAULICALLY VARIABLE GAS-EXCHANGE VALVE TRAIN - A hydraulic unit ( | 09-09-2010 |
| 20100236506 | Internal combustion engine valve drive train shifting device - In an internal combustion engine valve drive train shifting device including a camshaft having at least two shifting units arranged on the camshaft in spaced relationship, at least one coupling unit is provided interconnecting the at least two shifting units for shifting purposes. | 09-23-2010 |
| 20100242878 | VARIABLE VALVE APPARATUS FOR INTERNAL COMBUSTION ENGINE - In order to simultaneously exert a plurality of functions such as execution of internal EGR, application of engine braking, improvement in fuel consumption and purification of exhaust gas, a variable valve apparatus for an internal combustion engine of the invention includes a cam shaft arranged to be rotatable on a cylinder head of the internal combustion engine, a rocker shaft arranged to be capable of oscillation in the internal combustion engine, a continuous variable rocker arm mechanism which is driven by a cam formed on the cam shaft, opens or closes air intake valves and exhaust valves, and continuously makes a lift of the valves variable, and a switching rocker arm mechanism which is driven by the cam formed on the cam shaft, opens or closes the air intake valves and the exhaust valves, and switches the lift of the valves in a stepwise manner. | 09-30-2010 |
| 20100269771 | METHOD AND APPARATUS FOR OPERATING AN INTERNAL COMBUSTION ENGINE - An internal combustion engine includes intake and exhaust camshafts including high-lift lobes and low-lift lobes separated by a lobe separation angle. The engine transitions between operating in a controlled auto-ignition combustion mode with positive valve overlap and a controlled auto-ignition combustion mode with negative valve overlap solely by selecting the corresponding one of the high-lift lobes and the low-lift lobes. | 10-28-2010 |
| 20100294222 | VARIABLE VALVE ACTUATING MECHANISM WITH LIFT DEACTIVATION - An internal combustion engine is described having a valve mechanism that comprises two cams ( | 11-25-2010 |
| 20100307436 | VARIABLE VALVE LIFT APPARATUS THAT IS EQUIPPED WITH SWING ARM - A variable valve lift device equipped with a swing arm variably lifting an exhaust valve or an intake valve may include an outer body in which a mounting groove is formed in the middle portion thereof, an inner body mounted inside the mounting groove of the outer body and with a rear end thereof pivotally-connected to the outer body in the outer body, and a latching portion formed in the outer body and the inner body and fixing or releasing a front end portion of the inner body to the outer body. | 12-09-2010 |
| 20110017158 | Engine Valve System With Variable Lift and Duration - An improvement is disclosed for an engine valve system with variable lift and duration of the type that includes two cams mounted coaxially, a summation rocker coupled to cam followers in contact with both cams and movable in proportion to the instantaneous sum of the lifts of the respective cams, and a valve actuating rocker pivotably coupled to the summation rocker and serving to open an engine valve in dependence upon the movement of the summation rocker. In the invention, at least one of the couplings of the summation rocker with the cam followers and with the valve actuating rocker incorporates an adjustable eccentric which is rotatable to enable the clearance within the valve system to be set. | 01-27-2011 |
| 20110023801 | INTERNAL COMBUSTION ENGINE WITH VARIABLE-LIFT ELECTROHYDRAULIC VALVE ACTUATION - An internal combustion engine with a bottom camshaft ( | 02-03-2011 |
| 20110056448 | DIAGNOSTIC SYSTEMS AND METHODS FOR A TWO-STEP VALVE LIFT MECHANISM - A system includes a pressure signal adjustment module that generates a maximum pressure signal based on a fluid pressure signal from a pressure sensor of a camshaft phaser system of an engine. The pressure signal adjustment module detects a maximum peak value of the fluid pressure signal and maintains the maximum pressure signal at the maximum peak value for a peak and hold period. A diagnostic module detects a fault of the camshaft phaser system based on the maximum pressure signal during the peak and hold period. | 03-10-2011 |
| 20110061618 | High Efficiency Lift Profiler for an Internal Combustion Engine - A system for varying actuation of a combustion valve in an internal combustion engine, including a control shaft pivot housing fixedly disposed on the engine, a control shaft pivotably disposed within the control shaft pivot housing and eccentrically fixed to a control shaft disc, an input rocker subassembly pivotably disposed on the control shaft disc and having a contact feature disposable as a follower against a camshaft lobe, an output cam subassembly pivotably disposed on the control shaft and engageable by the input rocker subassembly and including an output cam profile for engaging a finger follower of the engine, and a bias spring to urge the output cam subassembly toward the input rocker subassembly. In one aspect of the invention, high lift events with full duration are produced whenever the control shaft is aligned such that the input rocker pivot center and the output cam pivot center are coincidental. | 03-17-2011 |
| 20110094465 | TWO-STEP VALVE LIFTER CONTROL SYSTEMS AND METHODS - A valve lifter control system includes a valve lifter control module and a forced transition determination module. The valve lifter control module determines a desired lift state of a valve lifter based on at least one of engine speed and engine load. The forced transition determination module initiates a forced transition of the valve lifter from the low-lift state to the high-lift state based on manifold vacuum independently of the desired lift state. | 04-28-2011 |
| 20110107990 | ENGINE HAVING CONCENTRIC CAMSHAFT WITH DIFFERENTIAL VALVE LIFT - A camshaft assembly may include a first shaft, a second shaft, a first lobe and a second lobe. The second shaft may be coaxial with and rotatable relative to the first shaft. The first lobe may be fixed for rotation with the first shaft and adapted to open a first valve in communication with an engine combustion chamber. The first lobe may define a first valve opening region having a first angular extent. The second lobe may be fixed for rotation with the second shaft and adapted to open a second valve in communication with the engine combustion chamber. The second lobe may define a second valve opening region having a second angular extent greater than the first angular extent. | 05-12-2011 |
| 20110126786 | VARIABLE VALVE OPERATING APPARATUS FOR INTERNAL COMBUSTION ENGINE - Provided is a variable valve operating apparatus for an internal combustion engine, which can favorably improve the mounting environment of an actuator in the aspect of achieving the improvement of coolability and the reduction of stress. The apparatus includes a guide rail which is provided in the outer peripheral surface of a cylindrical part respectively fixed to a camshaft; a projection part which is disposed so as to be engageable and disengageable with the guide rail; and an actuator which is disposed so as to oppose the cylindrical part and can protrude the projection part toward the guide rail. At least a part of the actuator is disposed so as to fit in a oval-shaped region which is virtually obtained by linking a base circle of a main cam and a base circle of a main cam seen from the axial direction of the camshaft in a state in which the projection part is not protruded toward the guide rail. | 06-02-2011 |
| 20110132300 | DRIVING ASSEMBLY FOR A MOTOR VEHICLE ENGINE BRAKE - A driving assembly for a motor vehicle engine or exhaust brake comprises a driveshaft ( | 06-09-2011 |
| 20110132301 | ELECTRO-HYDRAULIC VARIABLE VALVE LIFT APPARATUS - An electro-hydraulic variable valve lift apparatus may include a valve unit housing of which a guide protrude portion is formed therein, a main piston which is slidably disposed in the valve unit housing and defines a valve adjusting oil chamber with the valve unit housing, a main spring which is disposed within the valve adjusting oil chamber and elastically supports the main piston on the guide protrude portion, a dependent piston which is slidably disposed within the valve unit housing, is guided along the guide protrude portion, reciprocates according to reciprocation of the main piston, and opens a valve, and a main oil supply portion which selectively supplies hydraulic pressure to the valve adjusting oil chamber. | 06-09-2011 |
| 20110132302 | ROCKER ARM CHANGEOVER DEVICE FOR ENGINE - A rocker arm changeover device for an engine includes a major rocker arm to drive intake or exhaust valves. A driven rocker arm is arranged in line with the major rocker arm. A changeover pin is movable within a first pin hole and a second pin hole and to change between engagement and disengagement of the major and driven rocker arms. The first pin hole coaxially matches the second pin hole through rocking motions of the major and driven rocker arms. A first pin is movable within the first and second pin holes between a disengagement position at which the first pin is retracted into the first pin hole and an engagement position at which the first pin protrudes from the major rocker arm. A second pin is movable relative to and coaxially with the first pin within the first pin hole. | 06-09-2011 |
| 20110139102 | Valve Control Apparatus for Internal Combustion Engine - A valve control apparatus includes a drive shaft; a control shaft including a control shaft main body configured to be rotationally controlled according to a state of engine, and a control eccentric shaft located eccentrically relative to a rotation center of the control shaft main body; a rocker arm swingably supported by the control eccentric shaft and configured to convert a rotational motion of the drive shaft to a swinging motion; and a swing cam configured to open/close an engine valve according to the swinging motion of rocker arm. Both ends of the control eccentric shaft are formed with fixing holes extending in a radial direction of the control eccentric shaft. The control shaft main body is formed with insertion holes passing through the control shaft main body in a radial direction of the control shaft main body. The insertion holes respectively face the fixing holes. The control eccentric shaft is fixed to the control shaft main body by bolts. The bolts pass respectively through the pair of insertion holes and are screwed respectively into the fixing holes. | 06-16-2011 |
| 20110162602 | VARIABLE VALVE LIFT CONTROL SYSTEMS AND METHODS - An intake valve control system comprises a torque control module and an opening control module. The torque control module controls torque output by an engine based on a torque output target. The opening control module opens intake valves of M cylinders of the engine to a first lift position when the torque output target is less than a torque threshold and selectively transitions the intake valves of N of the M cylinders to a second lift position. N and M are integers greater than zero, and N is less than M. The second lift position is open further than the first lift position. | 07-07-2011 |
| 20110180028 | VARIABLE VALVE CONTROL IN INTERNAL COMBUSTION ENGINE - While an operating angle or a lift of an engine valve ( | 07-28-2011 |
| 20110197838 | Variable valve mechanism - [Object] It is to provide a variable valve mechanism that is downsized by providing a crank mechanism in place of an egg-shaped cam on an input shaft that is rotationally driven by a crankshaft of an internal combustion engine. | 08-18-2011 |
| 20110253084 | VARIABLE VALVE LIFT MECHANISM FOR ENGINE AND ARRANGEMENT OF OIL CONTROL VALVE - An engine has a cylinder block mounted on a crankcase and a cylinder head mounted on the cylinder block. The cylinder head has one side forming an intake port and an intake valve and another side forming an exhaust port and an exhaust valve. A camshaft includes an intake cam assembly and an the exhaust cam assembly, which respectively drive an intake valve driving member and an exhaust valve driving member. The intake cam assembly includes a first intake cam and a second intake cam. The intake valve driving member includes a low lift driving member corresponding to the first intake cam and a high lift driving member corresponding to the second intake cam. The low lift driving member and the high lift driving member form a hydraulic cylinder, which receives therein hydraulically operable pistons. | 10-20-2011 |
| 20110271921 | ENGINE THAT IS EQUIPPED WITH CONTINUOUS VARIABLE VALVE LIFT SYSTEM - An engine having a continuously variable valve lift system, may include a camshaft having an input cam formed at one side thereof, wherein the camshaft is mounted on a cylinder head, a drum shaft that is disposed with a predetermined distance from the camshaft, wherein a swing arm is rotatably mounted at one side thereof, a control shaft that is disposed with a predetermined distance from the drum shaft, wherein a control cam that varies a position of the drum shaft is formed thereto, an output cam that is rotatably mounted on the camshaft and is connected to and moved by the swing arm, such that the output cam variably lifts a valve mounted in the cylinder head according to a position of the drum shaft, | 11-10-2011 |
| 20110271922 | VARIABLE VALVE LIFT APPARATUS - A variable valve lift apparatus may include an outer tappet body of which a latching portion connecting hole and an outer tappet body guide hole may be formed therewithin, an inner tappet body of which an inner tappet body guide hole may be formed therewithin and slidably disposed within the outer tappet body, a latching portion which may be disposed within the inner tappet body guide hole and selectively coupled to the latching portion connecting hole, a latching portion support pin which guides the latching portion along a longitudinal direction of the inner tappet body guide hole and may be connected to the inner tappet body, a hydraulic pressure chamber, and a plunger which may be slidably disposed in the outer tappet body guide hole and selectively inserts the latching portion into the latching portion connecting hole according to the hydraulic pressure supplied from the hydraulic pressure chamber. | 11-10-2011 |
| 20110315103 | CONTINUOUS VARIABLE VALVE LIFT APPARATUS - A continuously variable valve lift apparatus includes a camshaft, a first cam disposed on the camshaft, a first valve opening/closing unit, a control unit transferring rotation of the first cam to the first valve opening/closing unit and adjusting valve lift of the first valve opening/closing unit, a second cam disposed on the camshaft and a second valve opening/closing unit constantly opened and closed by rotation of the second cam. | 12-29-2011 |
| 20120024246 | MULTI-MODE VALVE CONTROL MECHANISM FOR CAM-DRIVEN POPPET VALVES - A multi-mode valve control mechanism for an engine includes a primary cam follower rotatably mounted within a mount and having one end engaging a camshaft. One or more secondary cam followers are rotatably mounted within the mount and having one end engaging the camshaft. Each secondary cam follower is operatively coupled to a shaft. A follower is dedicated to each cam lobe. A frequency and a duration at which valves in a valve train are actuated is changed by activating only the primary cam follower in a first mode of operation, or activating both the primary cam follower and the one more than one secondary cam followers in a second mode of operation, depending on whether the control mechanism has been activated or not. In either mode of operation, the entire valve train assembly is actuated. | 02-02-2012 |
| 20120037105 | VARIABLY OPERATED VALVE APPARATUS FOR INTERNAL COMBUSTION ENGINE, START SYSTEM FOR INTERNAL COMBUSTION ENGINE, AND START CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A variably operated valve apparatus for use in an internal combustion engine comprises: a variable valve actuator configured to variably adjust at least a closure timing of an intake valve; and a mechanically stabilizing section configured to mechanically stabilize the closure timing of the intake valve at a position more retardation angle side than a most retardation angle position which is a limit of a control range of the stop position of the piston at the time of the stop of the engine. In addition, in start system and start control apparatus for the internal combustion engine, crank position control means controls a stop position of a piston at a position more advance angle side than the closure timing of the intake valve, at a time of stop of the engine. | 02-16-2012 |
| 20120042840 | ELECTRO-HYDRAULIC VARIABLE VALVE LIFT APPARATUS - An electro-hydraulic variable valve lift apparatus includes a housing, a driving cam, a pump piston which forms a main chamber with the housing, reciprocates within the housing according to rotation of the driving cam, and forms hydraulic pressure within the main chamber, a pump piston elastic portion disposed for elastically supporting the pump piston, an oil pressure controller communicating with the main chamber in order to control hydraulic pressure within the main chamber, a hydraulic piston slidably disposed within the housing, includes a first body having a first diameter and a second body having a second diameter larger than the first diameter, and is connected with a valve, and a piston guide disposed between the housing and the hydraulic piston for guiding the hydraulic piston. | 02-23-2012 |
| 20120055428 | VARIABLE VALVE ACTUATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - A variable valve actuation apparatus for an internal combustion engine includes a first link arm which has a projected portion that is engageable with and disengageable from a guide rail, and which is displaceable in the axis direction of a camshaft, and a link shaft linked to the first link arm in such a manner as to allow rotation but constrain movement in the axis direction. When an electro-magnetic solenoid is electrified, the first link arm rotates about the link shaft so that the projected portion engages with the guide rail. In association with the displacement of the link arms that occurs during the engagement, the state of motion of second rocker arms changes, so that the opening characteristic of valves provided for each cylinder is switched. | 03-08-2012 |
| 20120067312 | Engine that is Equipped with Variable Valve Device - An engine includes a hydraulic pressure lash adjuster (HLA) pivotally supporting an end of a swing arm and having a valve supporting the other end of the swing arm, wherein the hydraulic pressure lash adjuster includes a housing, a plunger of which one end portion thereof may be slidably inserted into the inside of the housing, the other end portion of which extends outwards and supports the end of the swing arm by selectively moving upwards or downwards in a length direction of the housing, a stopper pin slidably mounted in a chamber of the plunger so as to selectively lock the plunger to the housing such that the plunger cannot move in the housing, and a hydraulic pressure supply portion that selectively supplies one side of the stopper pin with a hydraulic pressure in the chamber of the plunger to move the stopper pin toward the housing. | 03-22-2012 |
| 20120067313 | ENGINE EQUIPPED WITH VARIABLE VALVE DEVICE - An engine that may be provided with a variable valve device may include an hydraulic pressure lash adjuster pivotally supporting one side of a swing arm, a valve supporting the other side of the swing arm, and an operating portion pushing a portion of the swing arm downwards so as to pivotally move the valve based on the hydraulic pressure lash adjuster, wherein the hydraulic pressure lash adjuster includes a housing in which an insertion hole may be formed therein, a slave piston that may be slidably inserted into the insertion hole, a master piston of which an end thereof may be placed into the insertion hole with a predetermined gap from the slave piston, wherein the other end of the master piston protrudes out of the housing and may be engaged with the one side of the swing arm, and an oil control valve that opens or closes a passage communicating with a master chamber that may be formed between the master piston and the slave piston in the housing. | 03-22-2012 |
| 20120079999 | VARIABLE VALVE LIFT APPARATUS - A variable valve lift apparatus including an inner tappet, an outer tappet surrounding and slidably contacting the inner tappet, and a latching pin slidably inserted into the inner tappet so as to implement a high lift and a low lift by selectively joining the inner tappet and the outer tappet may include a stopper partially inserted into the outer tappet and spaced apart from the latching pin in a movement direction of the latching pin so as to limit movement of the latching pin, and forming a latching pin joining groove in the outer tappet to selectively receive the latching pin, wherein the stopper partially projects to the outside of the outer tappet and is slidably engaged to a cylinder head groove formed to a cylinder head bore to prevent the variable valve lift apparatus from being rotated. | 04-05-2012 |
| 20120132161 | VARIABLE VALVE LIFT APPARATUS - A variable valve lift apparatus includes a cam, a swing arm of which one end thereof a valve is connected to and the swing arm contacting the cam, a support portion selectively supporting the other end of the swing arm, a hydraulic lash adjuster of which an oil supply hole and an oil exhaust hole thereto, and selectively supporting the swing arm according to oil supplying thereto or oil exhausting therefrom, a check valve selectively opening the oil exhaust hole and a control portion controlling the check valve for the check valve to selectively open the oil exhaust hole. | 05-31-2012 |
| 20120132162 | VARIABLE VALVE ACTUATOR ASSEMBLY INTEGRATED WITH VALVE BRIDGE - A integrated variable valve actuator assembly of a variable valve lift apparatus may include a rocker arm rotating on a rocker shaft and including an oil supply line with selectively provided oil, a fastener penetrating the side of the rocker arm and discharging oil supplied from the oil supply line through the oil passage, a valve bridge located at the bottom of the fastener and pressurizing valves, an actuator device including an actuator piston being inserted in the valve bridge and formed with an oil supply passage, and an actuator spring being inserted in the actuator piston and providing the actuator piston with elastic force, and a variable control device located at the bottom of the actuator piston and adjusting the heights of the actuator piston by a movement generated by the hydraulic pressure of oil supplied from the oil supply passage. | 05-31-2012 |
| 20120132163 | Valve Actuation Apparatus of Internal Combustion Engine and Rockable Cam for Use with the Same - In a valve actuation apparatus of an internal combustion engine employing a motion converter for converting a rotary motion of a drive cam into an oscillating motion of a rockable cam, the rockable cam has a cam contour surface, for operating an engine valve by the oscillating motion. The cam contour surface is contoured to have a valve-opening small lift area through which the cam contour surface extends from a base-circle area, a valve-opening middle lift area extending continuously from the valve-opening small lift area toward a cam-nose portion, and a valve-opening large lift area extending continuously from the valve-opening middle lift area toward a cam-nose top. A radius of curvature ρ | 05-31-2012 |
| 20120137997 | ENGINE ASSEMBLY INCLUDING VARIABLE VALVE LIFT ARRANGEMENT - An engine assembly may include an engine structure defining a first combustion chamber, a first port in communication with the first combustion chamber and a second port in communication with the first combustion chamber. A first valve may be located in the first port and a second valve may be located in the second port. A first multi-step valve lift mechanism may be supported on the engine structure and engaged with the first valve. A second multi-step valve lift mechanism may be supported on the engine structure and engaged with the second valve. The first and second multi-step valve lift mechanisms may be switched between low and high lift modes independent from one another. | 06-07-2012 |
| 20120137998 | VARIABLE VALVE DEVICE - A variable valve device includes an outer body that a valve contacts at a side thereof, wherein an end of the other side is supported by a hydraulic lash adjuster, a bearing contacting a cam is formed in the center, and a stepped latching device insertion hole is formed in the center of the other side, an inner body that is located in the outer body, including a side portion that can rotate together with an end portion of the outer body around a valve stem shaft in the same axis, and the other portion is connected to a bearing shaft, a latching device that is inserted in the latching device insertion hole, and that selectively causes movement of the outer body depending on the movement of the inner body, and a lost motion spring that is formed outside of the outer body, and that provides an elastic force to enable the inner body to perform a lost motion. | 06-07-2012 |
| 20120160198 | Internal Combustion Engine with Masking Wall the Curtain Area of the Intake Valves - A spark ignition four stroke internal combustion engine includes two intake valves and two exhaust valves for each cylinder, arranged around a central spark plug and provided with means for varying the lift of the intake valves between a zero value and a maximum value H. A masking wall which masks the curtain area of the intake valves on one side facing towards the exhaust valves is provided in the combustion chamber associated to each cylinder. The axis of each intake valve is inclined with respect to the axis of the respective engine cylinder by an angle not exceeding 12° and the abovementioned masking wall has along the seat of each intake valve a height h in the direction parallel to the axis of the intake valve which is comprised between 0.1 and 0.5 times, extremes excluded, the maximum value H of the lift of the intake valves. | 06-28-2012 |
| 20120174885 | Varying The Phase And Lift Of A Rocker Arm On A Camshaft Actuating A Valve Or Injector - In an internal combustion engine using poppet type valves, a center pivot rocker arm is moved through a specific path wherein the roller in contact with a cam is moved to alter the phasing of the valves or injectors in the engine. Depending on the interface between the valve or injector and the rocker arm, the rocker ratio of the rocker arm may be altered, giving a change in lift as well. By positioning a control arm at desired points on either side of a centered position, and rotating the control arm about its own pivot point via an arm actuator, phase change is achieved. The arm actuator controls the location of the control arm and thus the timing of the valve or injector relative to the rotation of the cam. Advanced, centered, and retarded phase change is possible depending upon the movement of the control arm. | 07-12-2012 |
| 20120204825 | VARIABLE VALVE TIMING DEVICE FOR INTERNAL COMBUSTION ENGINE UTILIZING HYDRAULIC VALVE ACTUATORS - This invention will provide a means for the lobe separation angle of the camshaft between the intake and exhaust valves of an internal combustion engine, or any other piston type machine, using a camshaft and valves to control the air flow into and/or out of the engine or piston type pumping or power machine, to vary as the engine or machine operates. This invention will effectively reduce or increase the angular measurement from the intake lobe centerline to the exhaust valve lobe centerline during operation. This modulation of the valve events may be controlled by a computer, manually or automatically. This modulation of the valve events may be controlled by an operator, whether manually or semi-automatically. This modulation of the valve events may be controlled by some other means. The invention will be commanded by an external command to change the valve events as the engine or machine operates and the invention will then change the valve events of the intake valve(s), the exhaust valve(s) or both. In an internal combustion engine, whether spark ignited or combustion ignited, this invention will greatly modify the operating characteristics of the engine as to power output, operation speeds, fuel economy, emissions output, heat production of the engine and other operating characteristics. | 08-16-2012 |
| 20120216766 | VALVE CLOSING/OPENING TIMING CONTROL DEVICE - A valve opening/closing timing control device, including: a drive-side rotating body rotating synchronously with crankshaft; a driven-side rotating body arranged coaxially with the drive-side rotating body and rotating synchronously with a camshaft in an internal combustion engine; a partition section provided to at least one of the drive-side rotating body and the driven-side rotating body so as to partition a fluid pressure chamber into a retard chamber and an advance chamber; a seal member preventing leakage of a working fluid between the retard chamber and the advance chamber; and a biasing member engaging with the seal member by a biasing force caused by elastic deformation and biasing the seal member from the partition section side towards the drive-side rotating body side or the driven-side rotating body side. | 08-30-2012 |
| 20120222636 | VARIABLE VALVE ACTUATION MECHANISM FOR OVERHEAD-CAM ENGINES WITH AN OSCILLATING/SLIDING FOLLOWER - A finger follower apparatus to effect opening of an engine valve includes a first member with first and second opposite ends. The first member is pivotally fixed at the first end and operatively engaged with the engine valve at the second end. A second member is slidably engaged with the first member and carries a roller for engagement with a cam. | 09-06-2012 |
| 20120227694 | Continuously variable valve actuation apparatus for an internal combustion engine - The apparatus includes a driving shaft ( | 09-13-2012 |
| 20120227695 | ARM TYPE VALVE LIFTER - A lash adjuster is provided which can be easily assembled and mounted in an arm type valve mounted and in an engine. The valve lifter includes an arm ( | 09-13-2012 |
| 20120279465 | VARIABLE VALVE ACTUATION APPARATUS, SYSTEM AND METHOD - In one form a rocker is disclosed coupled with a valve stem at one end and a cam follower at the other end. The rocker is operable to rotate about a fixed axis. In one form the cam follower includes a set of lower rollers operable to follow one cam lobe and an upper roller operable to follow another cam lobe. A leaf spring can be used to couple the cam follower with the rocker. A cam shaft can have a nested configuration including an inner shaft, an intermediate tube, and an outer tube. Cam lobes can be fastened to the cam shaft in one form by fastening through each of the inner shaft, intermediate tube, and outer tube, and in another form by attaching at least two devices inserted from either side of the cam shaft and that are not inserted at least through the inner shaft. | 11-08-2012 |
| 20120291733 | VARIABLE VALVE ACTUATION APPARATUS, SYSTEM, AND METHOD - A variable valve actuation system is disclosed. In one form a rocker is disclosed coupled with a valve stem at one end and a cam follower at the other end. The rocker is operable to pivot about a fixed axis. The cam follower is operable to be pivotally coupled with the rocker at one end of the cam follower. The cam follower includes a lower roller and an upper roller at its other end, each operable to engage cam lobes on separate cam shafts. In one form the cam follower includes a lower roller operable to follow a cam lobe on a lower cam shaft and an upper roller operable to follow a cam lobe on an upper cam shaft. The upper cam shaft and the lower cam shaft can have variable lobes. A spring can be used to bias the cam follower on the rocker. | 11-22-2012 |
| 20120325167 | VALVE DRIVE SYSTEM OF INTERNAL COMBUSTION ENGINE - A valve drive system of internal combustion engine which operates at a high compression ratio cycle, which is provided with an intake cam | 12-27-2012 |
| 20130032109 | VALVE LIFT DEVICE FOR A COMBUSTION ENGINE - A valve lift device for a combustion engine, a camshaft ( | 02-07-2013 |
| 20130032110 | SEALING COLLAR - A sealing collar is provided on a body in which the body has a cylindrical wall on which a hole emerges and a fluid situated in the body is able to escape through the hole. The sealing collar includes a fixing band entirely surrounding the cylindrical wall. The fixing band has a sealing portion to sealedly obturate the hole and a means for closing and tightening the fixing band. The fixing band is provided with at least one claw extending in the direction of the cylindrical wall so that on closing and tightening of the fixing band around the cylindrical wall, the hole is sealedly obturated and the claw is pressed against the cylindrical wall and contributes to immobilizing the sealing collar on the body. | 02-07-2013 |
| 20130042830 | VALVE OPERATING APPARATUS FOR INTERNAL COMBUSTION ENGINE - Provided is a valve operating apparatus for an internal combustion engine that, with respect to a configuration including urging means that urges a transfer member that transfers an acting force of a cam to a valve, can facilitate manufacture of a support portion of the urging means and suppress an increase in the mass of the internal combustion engine. A first rocker arm is provided that is interposed between a main cam and a valve and that transfers an acting force of the main cam to the valve. A lost motion mechanism is provided that urges the first rocker arm in one direction. A holding member is provided that holds the lost motion mechanism. The lost motion mechanism is attached to a spark plug tube through the holding member. | 02-21-2013 |
| 20130081586 | Variable Valve System - A variable valve system, may include a variable valve apparatus that controls opening/closing timing of an exhaust valve and an intake valve of an engine, and an oil supply device that supplies the variable valve apparatus with a pressured oil, wherein the exhaust valve and the intake valve may be opened/closed by rotation of a camshaft, and the oil supply device engaged with the camshaft may be operated by the rotation of the camshaft. | 04-04-2013 |
| 20130104821 | LOCKING MECHANISM FOR VARIABLE ACTUATION USING A SHUTTLE PIN AND RETURN SPRING | 05-02-2013 |
| 20130112161 | VALVE TIMING CONTROL APPARATUS AND VALVE TIMING CONTROL MECHANISM - A valve timing control apparatus includes a partitioning portion in a driven-side rotary member for partitioning the fluid pressure chamber into an advance angle chamber and a retard angle chamber, a restricting member in the driven-side rotary member and projectable and retractable relative to a driving-side rotary member, a restricting recess in the driving-side rotary member and restricting a relative rotational phase to a predetermined range in association with projection of the restricting member therein, a locking member disposed in the driven-side rotary member and projectable and retractable relative to the driving-side rotary member, a locking recess formed in the driving-side rotary member and locking the relative rotational phase to the predetermined phase in association with projection of the locking member therein, a communication passage formed between the restricting member and the locking member, and an urging passage for feeding fluid for projecting the restricting member into the restricting recess. | 05-09-2013 |
| 20130139771 | Continuous Variable Valve Lift Apparatus - A continuous variable valve lift apparatus may include an input cam disposed to an input shaft, a valve elastically supported by a valve spring, a rocker arm of which an end may be connected with the valve and the other end may be connected a rocker ratio change guide, which may be slidable along the length direction of the rocker arm and the rocker arm rotates around the rocker ratio change guide according to rotation of the input cam so as to open and close the valve, and a control portion selectively varies position of the rocker ratio change guide. | 06-06-2013 |
| 20130152889 | LOST-MOTION VARIABLE VALVE ACTUATION SYSTEM - Valve actuation systems are disclosed herein that allow valve opening timing to be varied using a cam phaser and that allow valve closing timing to be varied using a lost-motion system. In one embodiment, an actuation system is provided that has a locked configuration in which a bearing element is held in place between a cam and a rocker to transmit cam motion to an engine valve. The actuation system also has an unlocked configuration in which the bearing element is permitted to be at least partially ejected from between the cam and rocker, such that cam motion is not transmitted to the engine valve. The actuation system is switched to the unlocked configuration by draining fluid therefrom through a main valve which is piloted by a trigger valve. The actuation system also includes integrated autolash and seating control functionality. | 06-20-2013 |
| 20130186357 | VARIABLE VALVE TIMING DEVICE WITH ECCENTRIC VALVE ACTUATOR SLEEVES - Variable valve timing apparatus includes eccentric valve actuator sleeves which surrounds each of the valve actuators. In a preferred embodiment, the pivoting sleeves act to change the position of the valve actuator axis related to the camshaft axis. In combination with roller style cam follower, a movement of the actuator axis in camshaft rotation direction it causes a delayed valve operation, meantime a movement of the actuator axis towards the camshaft rotation direction it causes a advanced valve operation mode. | 07-25-2013 |
| 20130213329 | VARIABLE VALVE APPARATUS FOR INTERNAL COMBUSTION ENGINE - A variable valve apparatus for an internal combustion engine includes a control shaft, a camshaft having first and second camshaft members rotatable relative to each other, a rotary cam rotating together with the second camshaft member for opening and closing of an exhaust valve, an eccentric drive cam rotating together with the first camshaft member, a rocker arm caused to swing with rotation of the eccentric drive cam, a swing cam caused to swing by the rocker arm for opening and closing of an intake valve, a control cam formed on the control shaft to change an operating position of the rocker arm according to a rotational phase of the control shaft and vary the amount of swinging movement of the swing cam, a phase control mechanism adapted to control a relative rotational phase of the first and second camshaft members and an actuator for rotating the control shaft. | 08-22-2013 |
| 20130220251 | MECHANICALLY CONTROLLABLE VALVE DRIVE - A mechanically controllable valve drive includes a cylinder head, a valve lift adjustment device comprising a rocker arm, a pivoted lever assembly comprising an end surface, an engagement element, and a bearing means. The pivoted lever assembly is mounted in the cylinder head via the bearing means so as to be movable. A gas exchange valve is configured to have the pivoted lever assembly act thereon via the end surface. A positioning device is configured to engage on the rocker arm. A valve clearance is arranged between the rocker arm and the engagement element. At least one adjustment device is configured to provide a valve clearance adjustment. The engagement element of the pivoted lever assembly is operatively connected to the rocker arm of the valve lift adjustment device via a work curve. | 08-29-2013 |
| 20130255611 | VARIABLE VALVE GEAR FOR INTERNAL COMBUSTION ENGINE - A variable valve gear for an internal combustion engine that is capable of being disposed in a small compact manner and also capable of reducing the generation of a knocking sound. In a variable valve gear, a camshaft is supported by supporting walls of a cylinder head, and camshaft holders formed separately from the supporting walls, two exhaust rocker arms are disposed adjacent to each other, and a connecting pin is movably inserted into pin holes provided in the exhaust rocker arms by an actuator through a pushrod to connect or disconnect the exhaust rocker arms to or from each other. In the variable valve gear, the pushrod is slidably supported in a rod insertion hole of the camshaft holder with the connecting pin being disposed between the pair of camshaft holders and has an axis that is offset toward the camshaft with respect to an axis of the pushrod. | 10-03-2013 |
| 20130255612 | SYSTEM TO DIAGNOSE VARIABLE VALVE ACTUATION MALFUNCTIONS BY MONITORING FLUID PRESSURE IN A CONTROL GALLERY - A system for diagnosing malfunctions in a variable valve actuation device is disclosed. The system has a rocker arm assembly that includes: a first arm, a second arm with the first and second arms attached at a first end, a hydraulically operated latch assembly that functions to secure the first arm to the second arm when latched. It also includes a source of pressurized fluid connected to a hydraulic valve that provided fluid high or low pressure fluid to the hydraulically-operated latch. The latch may be operated by a remote device. A control gallery connects the hydraulic valve to the latch. A pressure transducer is positioned within the gallery and is adapted to create a signal indicating the pressure in the gallery. A control unit is coupled to the hydraulic valve and the pressure transducer, and is adapted to sense engine operation parameters, actuate the hydraulic valve, read the signal from the pressure transducer; and identify malfunctions of the rocker arm assembly based upon the signal from the transducer. | 10-03-2013 |
| 20130306013 | SENSING AND CONTROL OF A VARIABLE VALVE ACTUATION SYSTEM - A system for controlling variable valve actuation in an automobile engine is disclosed. A first cam has a first lift profile and a second cam has a second lift profile, both profiles having a base circle portion and a lift portion. A rocker arm assembly engages the cams having a first arm for riding on the first cam, and a second arm for riding on the second cam. The second arm has an activatable latch capable of securing the second arm to the first arm when latched. The latch may only be latched while the arms are riding on the base circle portion of the cams. When the first arm is secured to the second arm, the rocker arm assembly achieves a first lift profile and when the first arm is not secured to the second arm, the rocker arm assembly achieves a second lift profile. A non-contact sensor mounted adjacent the rocker arm assembly is adapted to monitor and create data indicative of whether the first arm is secured to the second arm. An engine control unit (ECU) for controlling functioning of at least one aspect of said engine operation receives the signal from the non-contact sensor and control functioning of the at least one aspect of said engine operation based upon the received signal from the non-contact sensor. | 11-21-2013 |
| 20130312680 | VALVE TIMING CONTROL APPARATUS - A variable valve timing control apparatus includes a driving side rotation member synchronously rotating with a crankshaft of an internal combustion engine, a driven side rotation member including a rotation peripheral surface, an intermediate lock mechanism for locking a rotational phase of the driven side rotation member at an intermediate phase between a most retarded angle phase and a most advanced angle phase, and a fixed member fixed to the internal combustion engine and including a fixed peripheral surface facing the rotation peripheral surface of the driven side rotation member. Plural seal rings each formed in an annular shape are positioned between the rotation peripheral surface of the driven side rotation member and the fixed peripheral surface of the fixed member, the seal rings positioned spaced apart from each other by a predetermined distance. The seal ring sandwiched between two of a communication portion for advanced angle, a communication portion for retarded angle, and a communication portion for lock in a direction of the rotational axis among the plural seal rings includes a communication passage which establishes constant communication between both sides thereof in association with the direction of the rotational axis when temperature of the pressurized fluid is within a temperature range which allows a control of the rotational phase of the driven side rotation member. | 11-28-2013 |
| 20130312681 | ROCKER ASSEMBLY HAVING IMPROVED DURABILITY - A durable system is disclosed for controlling variable valve actuation of an engine valve corresponding to a cylinder of an automobile engine. The system is designed to have a durability that exceeds the expected life of a conventional automobile engine. The system includes first crowned cam having a first lift profile, a second crowned cam having a second lift profile, and a rocker arm assembly. The rocker assembly includes a first arm having an end connected to said engine valve, having a high impact roller following the first crowned cam operating the engine valves according to a first lift profile. The rocker arm assembly also includes a second arm having slider pads riding on the second crowned cam to operate said engine valve according to a second lift profile. The slider pads have a sliding surface covered with an impact-resistant multilayer coating with its outermost coating being a wear-resistant coating. A latch having adjustable latch lash secures the second arm relative to the first arm when in a latched position causing the valve to operate according to a second lift profile when the latch is in a latched position, and the valve is operated according to a first lift profile when the latch is not in a latched position. | 11-28-2013 |
| 20140137823 | VARIABLE VALVE MECHANISM OF INTERNAL COMBUSTION ENGINE - The present invention provides a variable valve mechanism of an internal combustion engine which includes a main arm that is capable of swinging and that drives a valve when swinging, a first sub arm that is provided on one side in the lateral direction of the main arm and that swings when driven by a first cam, a second sub arm that is provided on the other side in the lateral direction of the main arm and that swings when driven by a second cam, and a switch device that performs switching between a first coupled state where only the first sub arm of the first and second sub arms is coupled to the main arm, and a second coupled state where only the second sub arm of the first and second sub arms is coupled to the main arm. | 05-22-2014 |
| 20140190431 | CUSTOM VVA ROCKER ARMS FOR LEFT HAND AND RIGHT HAND ORIENTATIONS - A modified rocker assembly having an offset end is designed to be used in engine heads having an obstruction that would not allow a switching rocker arm to be used. The modified rocker assembly is described having an obstructed side and a non-obstructed side. The rocker assembly has an outer structure with a first end, and an inner rocker structure fitting within the outer structure, the inner structure also having a first end. The modified rocker assembly has an axle pivotally connecting the first ends of inner structure to the outer structure, such that the inner structure may rotate within the outer structure around the axle. At least one torsion spring on one side of axle, rotationally biases the inner structure relative to the outer structure. The outer structure, on the obstructed side as it extends from the second end toward the first end, is offset toward the non-obstructed side creating the first offset portion to provide additional clearance on the obstructed side. This design allows the modified rocker arm to fit into an engine head having an obstruction on its obstruction side. | 07-10-2014 |
| 20140251246 | METHOD AND SYSTEMS FOR VARIABLE VALVE TIMING FOR A V-ENGINE WITH A SINGLE CENTRAL CAMSHAFT - Various methods and systems are provided for varying valve timing in a V-engine. In one embodiment, a method for an engine comprises pivoting a first cam follower for a first cylinder of a first bank and a second cam follower for a second cylinder of a second bank about a rotatable pivot shaft, driving the first cam follower and the second cam follower with a camshaft to operate a respective first valve of the first cylinder and a second valve of the second cylinder, and rotating the pivot shaft to vary a valve timing of the first cylinder and the second cylinder. | 09-11-2014 |
| 20140261264 | VARIABLE VALVE TIMING APPARATUS AND INTERNAL COMBUSTION ENGINE INCORPORATING THE SAME - A variable valve timing apparatus, and internal combustion engine incorporating the same, that allows the timing of the opening and/or closing of intake and/or exhaust cylinder valves to be altered relative to a reference timing. As a result, the timing of the valve event can be adjusted relative to a phase of the crankshaft and/or the cycle of the pistons | 09-18-2014 |
| 20140299083 | VALVE TRAIN SYSTEM FOR PROVIDING CONTINUOUSLY VARIABLE VALVE LIFT - A valve train system includes a camshaft with a camshaft lobe that is rotatable about a camshaft axis. A control shaft is rotatable about a control shaft axis and includes an eccentric control shaft slot. An input rocker engages the camshaft lobe and has a rocker slot. An output rocker engages a valve actuation member which is engaged with a combustion valve. A rocker pivot shaft has a rocker pivot shaft axis and is fixed to the output rocker and extends through both the control shaft slot and the rocker slot. Rotation of the camshaft causes the input rocker and the output rocker to pivot about the rocker pivot shaft axis and rotation of the control shaft changes the magnitude that the input rocker and the output rocker pivot about the rocker pivot shaft axis and also changes the magnitude of opening the combustion valve. | 10-09-2014 |
| 20150013627 | ENGINE VALVE CONTROL MECHANISM - A valve control mechanism is configured that is capable of optimally controlling an engine by lifting an intake valve only by the necessary amount, while suppressing noise at the time of operation. This valve control mechanism includes a control member that rotates around a control axis due to a driving force of an actuator, and a base end portion of a rocker arm is pivotably supported around a pivot axis by an eccentric support portion of the control member. The rocker arm is pivoted by a cam portion of a camshaft abutting against an intermediate roller of the rocker arm, and an operation of opening the intake valve is performed due to a pressure force from the pivot end. The rocker arm is shifted in the longitudinal direction due to an operation of the actuator, and control for changing the lift amount of the intake valve is performed. | 01-15-2015 |
| 20150013628 | MOTOR VEHICLE VALVEE TRAIN ADJUSTMENT DEVICE - In a motor vehicle valve train adjustment device comprising at least one camshaft with at least two axially displaceable cam elements wherein at least one cam element has a cam track with a valve lift and a cam track with zero valve lift for a deactivation of at least one cylinder, and at least one other cam element of the at least two axially displaceable cam elements has a cam track with a first valve lift and a cam track with a second valve lift by which a cylinder which remains fueled during a partial cylinder deactivation is adapted to the at least one cylinder deactivation by special valve lift characteristics. | 01-15-2015 |
| 20150059673 | CONTINUOUSLY VARIABLE VALVE LIFT ACTUATOR OF ENGINE - Disclosed is a continuously variable valve lift actuator of an engine. The continuously variable valve lift actuator of an engine changes rotating angles of a rocker arm and a lift arm having a four-bar link structure to control an intake amount of air of an intake valve based on a running state of a vehicle, and adjusts a location and a length of a link bar by taking into consideration a rotating direction of a cam shaft and interference according to layout of the engine to advance an open time of a valve. The continuously variable valve lift actuator of an engine can reduce pumping loss by controlling an intake amount of air by changing an elevating distance of a valve according to a running state of a vehicle, and the fuel efficiency and the efficiency of the engine can be improved by advancing the open time of the valve. | 03-05-2015 |
| 20150075465 | ROTOR FOR VARIABLE VALVE TIMING SYSTEM AND VVT SYSTEM COMPRISING THE ROTOR - The invention relates to rotor body for a variable valve timing system, comprising a main body comprising a front side, a back side and vanes tips, made from a fibrous reinforced polymeric material, a central part comprising an (axial) bore hole made of metal, and sealing elements made of a non-reinforced polymeric material at the vain tips and at the front side and back side. The invention also relates to a variable valve timing system comprising an assembly of a rotor and a stator receiving the rotor on a camshaft, wherein the rotor is a rotor body as described above, wherein an end part of the camshaft and/or a fixing element is received in the bore hole and the rotor is fixed at the end part of the camshaft with the fixing element. | 03-19-2015 |
| 20150075466 | Valve control for a gas exchange valve of an internal combustion engine - A valve control device for a gas exchange valve of an internal combustion engine has a cam follower lever interacting with the camshaft. A rocker arm rests on the cam follower lever and actuates the valve. An adjusting device acts on the rocker arm to adjust a valve lift. The rocker arm has first and second control surfaces with first and second radii of curvature, respectively, The cam follower lever has a third control surface with third radius of curvature. The first control surface contacts a fourth control surface of a guide element of the engine with fourth radius of curvature. The second control surface of the rocker arm contacts a valve element. The first to fourth radii of curvature are adjusted such that, when adjusting the valve lift, the valve does not open when the cam follower lever rests on a cam base circle section of the camshaft. | 03-19-2015 |
| 20150083062 | OUTER HOUSING FOR A HYDRAULIC LASH ADJUSTER WITH TAPERED OIL FEED ANNULUS - A hydraulic lash adjuster is provided. The hydraulic lash adjuster includes an outer housing having an annular body with an open first axial end, a closed second axial end, a radially inner wall defining an axial bore, and a radially outer wall. The radially outer wall includes a first annular groove located adjacent to the first axial end, and a second annular groove located adjacent to the second axial end. A first port is located in the first annular groove, and a second port is located in the second annular groove. A radially outer surface of the first annular groove tapers radially inwardly between a first axial end and a second axial end. | 03-26-2015 |
| 20150083063 | SWITCHABLE HYDRAULIC LASH ADJUSTER WITH EXTERNAL SPRING AND SOLID STOP - A valve train of an internal combustion engine with a switchable hydraulic lash adjuster (SHLA) is provided, including a cylinder head having a boss, with an opening defined in the boss. The SHLA is located in the opening, and the SHLA includes: an outer housing having an inner bore, an inner housing movably located in the inner bore of the outer housing, and including a spring retainer at an outer end thereof, and a plunger assembly with a hydraulic lash adjuster mechanism movably located in a bore of the inner housing. A lost motion spring is located between the spring retainer and a spring seat located around the boss. This arrangement reduces the overall packaging length of the SHLA in that only a fraction of the lost motion spring's installed height has an influence on the overall length of the SHLA. | 03-26-2015 |
| 20150096512 | CONTINUOUSLY VARIABLE VALVE LIFT MECHANISM - A continuously variable valve lift mechanism for an internal combustion engine includes a cam, a cam follower, a valve follower, a rocker shaft, and a rocker arm. The cam follower includes a first roller driven by the cam and a second roller. The valve follower includes a driven face in contact with the second roller of the cam follower and a driving face. The rocker shaft contacts the valve follower. Rotational movement of the rocker shaft about a rocker shaft rotational axis results in movement of the driven face with respect to the second roller. The rocker arm has a pivot axis and is in contact with the driving face of the valve follower | 04-09-2015 |
| 20150114330 | VARIABLE VALVE DEVICE THAT VARIES LIFT AMOUNT OF VALVE - A variable valve device for varying a lift amount of a valve includes a first valve and a second valve that are respectively disposed to open or close a port, a swing arm in which first and second valve pressing portions are formed at both sides to press the first valve and the second valve, one supporting portion that supports a part that is apart from the first and the second valve pressing portions on the swing arm, a lost body that is rotatably disposed on the swing arm through a lost pin, a camshaft on which a first cam and a second cam are formed to respectively press the lost body and the swing arm, and a latching pin that selectively fixes the swing arm with the lost body and is disposed to move in a direction that the first and the second valves are arranged. | 04-30-2015 |
| 20150128890 | ROCKER ARM - A rocker arm has a first roller for engaging a first rotatable cam surface, whereby at least part of the rocker arm can be pivoted by at least the first rotatable cam surface to move a valve to cause a first valve event, and a further roller for engaging a further rotatable cam surface, whereby at least part of the rocker arm can be pivoted by the further rotatable cam surface to move the valve to cause a second valve event which is different from the first valve event. The rocker arm is configurable in a first mode of operation in which one of the first and second valve events occur and a second mode of operation in which both the first and second valve events occur or the other of the first and second valve events occur. | 05-14-2015 |
| 20150144083 | ENGINE HAVING VARIABLE VALVE TIMING DEVICE - An engine having a variable valve timing device may include a camshaft having a cam that lifts a valve, a valve body with one side fixed with the camshaft and the other side fixed with a fixed housing, variable wings protruding on an outer circumferential surface of the fixed housing, a sprocket housing forming a delay chamber and an advance chamber with the variable wings and having a sprocket on an outer circumferential surface, a control spool disposed coaxially with the camshaft and inserted in the valve body to selectively supply hydraulic pressure from an outside to the delay chamber or the advance chamber, and an actuator fastened to an outer end of the control spool, with a side fixed to a side of the engine, and advancing or delaying the sprocket housing with respect to the valve body by adjusting the hydraulic pressure supplied to the advance chamber or the delay chamber through the control spool by pulling or pushing the control spool. | 05-28-2015 |
| 20150322827 | LOW FRICTION SHIM SURFACE - A variable valve actuating mechanism comprising a camshaft having two concentric cam lobes that may be rotated relative to one another a summation lever engaging with both cam lobes, a valve actuating rocker pivotally connected to the summation lever and engaging with a hydraulic lash adjuster at a first end and with a valve at a second end, and a shim surface movable with the pivot axis connecting the summation lever to the valve actuating rocker for limiting the expansion of the hydraulic lash adjuster to control clearance in the rocker system, wherein, in order to reduce friction, the shim surface abuts with a stationary stop surface that forms part of a camshaft support bearing. | 11-12-2015 |
| 20150330265 | CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE AND VARIABLE VALVE DEVICE OF INTERNAL COMBUSTION ENGINE - A control device of an internal combustion engine includes: a variable valve device including: first and second rocker arms; a cam; a rocker shaft provided with a lubricating oil passage; a pin switching the first and second rocker arms between a coupling state and a non-coupling state; a biasing member biasing the pin; a switching oil passage capable of supplying oil pressure to the pin in a direction opposite to a biasing direction; a lash adjuster; and a supplying oil passage, capable of supplying oil pressure to the pin in the biasing direction of the biasing member and supplying oil pressure into the lash adjuster, a hydraulic pump; an oil pressure control valve; and a control unit controlling the oil pressure control valve to always supply the supplying oil passage with oil pressure higher than oil pressure within the lubricating oil passage, during driving of an internal combustion engine. | 11-19-2015 |
| 20150345342 | DESIGN METHOD OF SHORT DURATION CAM, SHORT DURATION CAM, VARIABLE VALVE LIFT APPARATUS INCLUDING THE SAME, AND DESIGN METHOD OF CAM - A short duration cam of a variable valve lift apparatus has a cam lift acceleration including a first peak formed before a center of the cam lift acceleration, and a second peak formed after the center of the cam lift acceleration. A relative ratio of a smaller value to a greater value of the first peak and the second peak is 0.8 or more. | 12-03-2015 |
| 20150354468 | CONTINUOUS VARIABLE VALVE TIMING WITH INTERMEDIATE LOCK PIN AND METHOD FOR CONTROLLING THE SAME - A continuous variable valve timing with an intermediate lock pin and includes a camshaft, with a cam that protrudes from the camshaft, configured to lift a valve. In addition, a variable device is disposed at one side of the camshaft with a retarded angle chamber and an advanced angle chamber disposed therein. An oil control valve is configured to supply the retarded angle chamber or the advanced angle chamber with hydraulic pressure to retard or advance the rotation of the camshaft, respectively. Furthermore, a cam position detector is configured to detect a rotation position of the cam. A controller is configured to detect a signal of the rotation position of the camshaft from the cam position detector and vary a frequency of a PWM duty configured to operate the oil control valve, when a variation characteristic of the signal of the rotation position exceeds a predetermined range. | 12-10-2015 |
| 20150369094 | Variable Valve Lift Apparatus of Engine - A variable valve lift apparatus of an engine includes a first body rotated at within a preset angle range by rotating a high-speed cam coupled to a camshaft, a second body coupled to the first body or decoupled from the first body and rotated within a preset angle range by rotating a low-cam coupled to the camshaft when the second body is decoupled from the first body, a latching pin provided retractably forward of the first body such that the first body is coupled to or decoupled from the second body, and an actuating unit to retractably actuate the latching pin. The degree of the lift of the valve is variably controlled in two stages of high-speed and low-speed modes through the rotary motion of the high speed cam or low speed cam by coupling or decoupling the first and second bodies to or from each other. | 12-24-2015 |
| 20160017769 | VARIABLE VALVE MECHANISM FOR INTERNAL COMBUSTION ENGINE - A variable valve mechanism for an internal combustion engine includes a control shaft and a cam. The control shaft is configured to change a maximum lift amount of an engine valve according to displacement of the control shaft. The cam is configured to displace the control shaft in the axial direction due to rotation of the cam. The cam surface includes change zones and retention zones. Respective lengths of the retention zones in a rotation direction of the cam is set such that respective length of the retention zones in the rotation direction increases as the maximum lift amount retained by the retention zones increases | 01-21-2016 |
| 20160032788 | VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE - A cam of a variable valve device is provided with a change region, which is a region with which a roller abuts when a control shaft is displaced in an axial direction to change a maximum lift amount and in which a cam surface is inclined such that a diameter of the cam gradually increases toward one side in a rotation direction. The cam is provided with a retainer region with which the roller abuts when a position of the control shaft in the axial direction is retained to retain the maximum lift amount. An inclination angle of the cam surface in the retainer region is smaller as the maximum lift amount when the action member abuts with the retainer region is larger. | 02-04-2016 |
| 20160061067 | ROCKER ASSEMBLY HAVING IMPROVED DURABILITY - A durable system for controlling variable valve actuation of an engine valve corresponding to a cylinder of an automobile engine. The system includes first and second crowned cams having first and second lift profiles and a rocker arm assembly. The rocker assembly includes a first arm having an end connected to said engine valve, having a high impact roller following the first crowned cam operating the engine valves according to a first lift profile. The rocker arm assembly also includes a second arm having durable slider pads riding on the second crowned cam to operate said engine valve according to a second lift profile. A latch secures the second arm relative to the first arm when in a latched position causing the valve to operate according to a second lift profile. The valve operates according to a first lift profile when the latch is not in the latched position. | 03-03-2016 |
| 20160061068 | SWITCHING ROCKER ARM - A switching rocker arm assembly can include an outer arm having a first outer side arm and a second outer side arm, each of the first and second outer side arms having a high lift lobe contacting surface, and an inner arm disposed between the first and second outer side arms and pivotably secured to the outer arm, the inner arm having a low lift lobe contacting surface and defining a latch bore. A latch assembly can be arranged at least partially within the latch bore of the inner arm. The latch assembly can include a latch pin having an orientation pin receiving recess, a sleeve engaging the latch pin and having an orientation pin opening, and an orientation pin extending through the orientation pin opening into the orientation pin receiving recess. The orientation pin can have a substantially cylindrical first wall and a substantially cylindrical second wall. | 03-03-2016 |
| 20160084119 | VARIABLE VALVE MECHANISM OF INTERNAL COMBUSTION ENGINE - The present invention provides a variable valve mechanism of an internal combustion engine, which includes a rocker arm that is driven by a cam so as to swing to drive a valve, a switching pin that is attached to the rocker arm so as to be shifted between a first position and a second position, a shift device that shifts the switching pin from the first position to the second position, and a return spring that returns the switching pin. In the variable valve mechanism, a drive state of the valve is switched by shifting the switching pin, the rocker arm is formed to have such a dimension that one end of the switching pin is exposed while projecting outward from the rocker arm, and the return spring is externally fitted to the one end of the switching pin so as to be exposed outside the rocker arm. | 03-24-2016 |
| 20160090874 | VARIABLE VALVE LIFT SYSTEM - A variable valve lift system includes a camshaft, a high lift cam, a low lift cam, a valve lift apparatus including a high lift body driven by the high lift cam, a low lift body driven by the low lift cam, and a first coupling part to selectively couple the high lift body and the low lift body, a valve provided at one end of the low lift body and opened and closed by the low lift body, a hydraulic lash adjuster including an adjuster housing installed in a cylinder head, an adjust unit to support the other end of the low lift body, slidably provided within the adjuster housing, and to adjust clearance of the valve, and a second coupling part to selectively couple the adjust unit and the adjuster housing, and a hydraulic pressure supply unit to selectively supply hydraulic pressure to the first and second coupling parts. | 03-31-2016 |
| 20160108779 | VARIABLE VALVE MECHANISM OF INTERNAL COMBUSTION ENGINE - The present invention provides a variable valve mechanism, which includes a rocker arm including an input member and an output member; a switching device that switches a drive state of the valve by displacing the switching pin between a coupling position at which the switching pin extends between the first pinhole in the input member and the second pin hole in the output member and a non-coupling position at which the switching pin does not extend; and a lost motion spring. A displacement clearance is formed between an inner peripheral surface of the first or second pin hole and an outer peripheral surface of the switching pin to permit the relative displacement in a range of the displacement clearance at a coupled time so that a tappet clearance is not formed with the input member urged toward the cam by the lost motion spring. | 04-21-2016 |
| 20160108780 | VARIABLE VALVE MECHANISM OF INTERNAL COMBUSTION ENGINE - The present invention provides a variable valve mechanism of an internal combustion engine, which includes a rocker arm that includes a roller arm including a roller that rotatably abuts against a cam and a side arm provided at a side of the roller arm and that drives a valve, and a switching device that includes a switching pin and a hydraulic chamber provided inside the rocker arm and that switches a drive state of the valve by displacing the switching pin between a coupling position at which the switching pin extends between the roller arm and the side arm and a non-coupling position at which the switching pin does not extend between the roller arm and the side arm based on variations in hydraulic pressure in the hydraulic chamber. The switching pin is provided on an axis of the roller, and the hydraulic chamber is provided inside the roller arm. | 04-21-2016 |
| 20160115831 | LATCH INTERFACE FOR A VALVE ACTUATING DEVICE - A novel latch seat for a switching rocker arm assembly used in variable valve actuation (VVA) systems for internal combustion engines. The seat is formed interactively in the assembled switching rocker arm using a novel fixture and press. The press interactively creates a curved dimple of the correct curvature, position and depth while measuring several lash dimensions. Since the latch seat is formed on the assembled rocker arm assembly, the latch seat depth is designed to account for the inaccuracies in the rocker arm assembly parts which create lash. Therefore all of the parts may be made with less precision since the latch seat is sized to compensate for the inaccuracies of all of the parts. The rocker arm assembly parts now may be manufactured to less stringent standards, but result in a rocker arm assembly with same accuracy of rocker arm assemblies manufactured to previous standards. | 04-28-2016 |
| 20160123193 | COLLAPSIBLE PUSHROD VALVE ACTUATION SYSYEM FOR A RECIPROCATING PISTON MACHINE CYCLINDER - A valve actuation system is described containing a collapsible pushrod device for use in a reciprocating piston machine cylinder such as an engine. The collapsible pushrod device replaces a conventional pushrod. The system can include a driver base, plunger, and a deactivation pin assembly. In normal operation, the pins lock the driver base and plunger together thereby providing regular valve motion. Under selected conditions, the pin assembly controller unlocks the driver base from the plunger. Valve lift is reduced or eliminated. When eliminated, the cylinder is deactivated. The system can vary the effective compression ratio between higher for cold starting and other selected operating conditions and lower for warmed-up running, as well as trap additional exhaust residuals to assist starting and light load. This is especially useful for Diesel engines. Various means may be used to unlock the pins including oil pressure, bi-metal spring temperature, or electromagnetic activation. The telescoping motion which limits the motion of the valve may occur in one or more steps. | 05-05-2016 |
| 20160130991 | ROCKER ARM ASSEMBLY AND COMPONENTS THEREFOR - A method of precision manufacture of an outer arm of a rocker arm assembly is performed by determining structures of a rough outer arm that would require precision processing and locations to support the structures as they are processed. Starting with at least one structure requiring precision processing, locations on the outer arm close to the structure to hold the outer arm during processing are determined that would cause minimal distortion of the outer arm during processing. The outer arm is then provided with clamping lobes at these locations. The clamping lobes of the outer arm are clamping into a fixture for manufacturing. The slider pad may now be precision ground while the outer arm is clamped in the fixture with minimal risk of distortion of the outer arm. | 05-12-2016 |
| 20160138435 | ROCKER ARM ASSEMBLY AND COMPONENTS THEREFOR - A method of precision manufacture of an outer arm of a rocker arm assembly is performed by determining structures of a rough outer arm that would require precision processing and locations to support the structures as they are processed. Starting with at least one structure requiring precision processing, locations on the outer arm close to the structure to hold the outer arm during processing are determined that would cause minimal distortion of the outer arm during processing. The outer arm is then provided with clamping lobes at these locations. The clamping lobes of the outer arm are clamping into a fixture for manufacturing. The slider pad may now be precision ground while the outer arm is clamped in the fixture with minimal risk of distortion of the outer arm. | 05-19-2016 |
| 20160153324 | CONTINUOUS VARIABLE VALVE DURATION APPARATUS AND CONTROL METHOD USING THE SAME | 06-02-2016 |
| 20160160696 | MULTIPLE VARIABLE VALVE LIFT APPARATUS - A multiple variable valve lift apparatus includes a camshaft. At least two cam portions are disposed on an exterior circumference of the camshaft and including a high cam and a normal cam. A cylinder deactivation device is configured to perform a lever motion by one of the high cam or the normal cam and to be operated by hydraulic pressure. At least two lift operating portions are disposed on the exterior circumference of the camshaft and moving the cam portions in an axial direction of the camshaft. An operation control portion selectively moves the operating portions in the axial direction of the camshaft. A guide rail is formed in a groove of an exterior circumference of the lift operating portions into which a pin is inserted. The guide rail guides the pin according to rotation of the camshaft and the operating portions. | 06-09-2016 |
| 20160160697 | CONTINUOUS VARIABLE VALVE DURATION APPARATUS AND ENGINE PROVIDED WITH THE SAME - A continuous variable valve duration apparatus includes a camshaft, a plurality of wheels mounted to the camshaft, of which a wheel key is formed thereto respectively, a plurality of cam portions of which a cam and a cam key are formed thereto respectively, of which the camshaft is inserted thereto, of which relative phase angle with respect to the camshaft is variable, a plurality of inner brackets connected with the each wheel key and the each cam key, a slider housing of which the each inner bracket is rotatably inserted thereto, and rotatably configured around a hinge bracket connected to a cylinder head and a control portion selectively moving the slider housings to change relative position of a rotation center of the inner brackets. | 06-09-2016 |
| 20160160701 | CYLINDER DEACTIVATION ENGINE - A cylinder deactivation engine may include: one or more deactivation cylinders to be selectively deactivated; one or more non-deactivation cylinders not to be deactivated; cylinder deactivation apparatuses operably connected to the deactivation cylinders and operated by hydraulic pressure to selectively implement a zero lift of a valve or valves of the deactivation cylinders; one or more variable valve lift apparatuses operably connected to the non-deactivation cylinders and operated by the hydraulic pressure to selectively change a lift of a valve of the non-deactivation cylinders; a hydraulic pump that generates the hydraulic pressure for operating the variable valve lift apparatuses and the cylinder deactivation apparatuses; and one or more oil control valves that control the hydraulic pressure from the oil pump so that the hydraulic pressure is selectively supplied to the variable valve lift apparatuses and the cylinder deactivation apparatuses. | 06-09-2016 |
| 20160160707 | VARIABLE VALVE LIFT APPARATUS - A variable valve lift apparatus to vary lift of a valve disposed at an engine may include an outer body selectively making a lever motion according to rotation of a cam, being adapted such that the valve is connected with one end thereof and a pivot axis of the lever motion is disposed at another end thereof, and forming an inside space, an inner body disposed in the inside space of the outer body and adapted such that one end thereof is rotatably connected with the one end of the outer body, a connecting shaft disposed so as to penetrate the one end of the outer body and the one end of the inner body and connect the outer body with the inner body, and a lost motion spring provided so as to return the inner body which is relatively rotated with the outer body around the connecting shaft. | 06-09-2016 |
| 20160169064 | METHOD FOR OPTIMIZING RESPONSE TIME OF HYDRAULIC LATCH-PIN IN CYLINDER DEACTIVATION ROCKER ARM | 06-16-2016 |
| 20160169065 | SYSTEM, METHOD AND DEVICE FOR ROCKER ARM POSITION SENSING | 06-16-2016 |
| 20160169124 | CONTROLLER FOR INTERNAL COMBUSTION ENGINE | 06-16-2016 |
| 20160194984 | INTERNAL COMBUSTION ENGINE | 07-07-2016 |
| 20190145288 | VARIABLE VALVE ACTUATION SYSTEM FOR TYPE II VALVERAIN USING LOST MOTION AND RESET | 05-16-2019 |
