Abstract: 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.

Abstract: The present invention provides to a rocker arm apparatus for cylinder deactivation with a new structure for increasing fuel efficiency in a gasoline engine. For this, the present invention provides a rocker arm apparatus for cylinder deactivation including: a rocker arm; a restoring spring supported at the bottom of a rear end portion of the rocker arm; a roller coupled to the rocker arm to be pressed by a cam; a pair of rocker shaft assemblies each including first and second rocker shafts, and a connecting rod integrally connecting the first and second rocker shafts; a pair of rocker shaft support members connected to the rocker arm by means of the first and second rocker shafts; and a transfer member for controlling the rocker shaft assembly.

Abstract: In a gas exchange valve actuating device for transmitting a drive movement to at least one gas exchange valve of an internal combustion engine which includes a braking unit having at least one actuator, the gas exchange valve actuating device is provided with a locking unit for locking the actuator counter to an opposing force when the actuator has reached a specific position.

Abstract: A camshaft apparatus includes rolling bearings which support a camshaft rotatably, whereby a reduction in torque when an engine is started or is running at low speeds, a reduction in vibration of the camshaft and an extension of the lives of the bearings can be realized. In the rolling bearings, one rolling bearing is made to constitute a main ball bearing which restrains an axial relative movement of the camshaft relative to a shaft case, and the other rolling bearings are made to constitute a plurality of needle roller bearings, whereby a mechanical movement of the camshaft in an axial direction can be restricted in an ensured fashion by the main ball bearing. As to relative displacements due to thermal expansion or contraction of the camshaft and/or the shaft case, an axial relative displacement can be absorbed by needle rollers relatively moving on inter-cam outer circumferential surface areas.

Abstract: A V-type engine for a vehicle is provided with front and rear banks including intake and exhaust valves exposed to a combustion chamber, a valve operating device for operating the engine valves, a valve stop mechanism for stopping the operation of the engine valves according to an operational condition of the vehicle, and an actuator for driving a throttle valve. A valve stop mechanism is provided in either the front bank or the rear bank. An actuator provided in one of the front bank and the rear bank excluding the valve stop mechanism is lower in height than the actuator provided in the other of the front bank.

Abstract: 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.

Abstract: A valve drive with a decompression brake for an internal combustion engine, which has a camshaft with a cam, a rocker arm for transmitting the cam stroke to a gas exchange valve, a pivot bearing supporting the rocker arm, and a hydraulic valve play compensating element arranged in force flow between the cam and gas exchange valve. The valve play compensating element is fixed in the engine and valve drive also has a secondary lever with a first and second lever section. The secondary lever is angularly connected, between the lever sections, to a lever support formed on the rocker arm, is supported with the first lever section on the valve play compensating element and actuates the gas exchange valve by the second lever section. The effective lever arm of the first lever section is considerably greater than the effective lever arm of the second lever section.

Abstract: A valve train of an internal combustion engine is provided with a plurality of camshaft supports arranged on a support member of the engine, and a camshaft is supported on the camshaft supports. The camshaft has valve operating cams thereon for opening and closing engine valves of engine. A torque reducing mechanism is provided to apply a counter torque to the camshaft to suppress torque fluctuation of the camshaft caused by reaction forces applied to the cams by the engine valves. The torque reducing mechanism has a rotating member that rotates together with the camshaft, and a counterforce applying member for applying a counterforce to the rotating member to apply a counter torque to the camshaft. The counterforce applying member is supported on a connecting member connecting adjacent ones of the camshaft supports.

Abstract: 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.

Abstract: A valve actuation system in an internal combustion engine provides for, among other things, valve control in a single and dual camshaft “push rod” type engine without the use of a return spring mechanism. In one embodiment of the present invention, a single rocker link or “push rod” is operably connected to a bifurcated rocker valve for opening and closing a single valve.

Abstract: The present invention provides a variable valve lift including a housing, a plurality of swing arms that are rotatably arranged at the housing, and a plurality of latching mechanisms for selectively latching the plurality of swing arms.

Abstract: A cam follower for actuating a gas exchange valve of an internal combustion engine, which has a lifting body cold formed from sheet metal and that forms, on a valve-sided lifting section which has two lateral walls and a first base section connecting the walls, a cross-sectional profile which is open towards the gas exchange valve in a U-shaped manner, and on a joint-sided lifting section that has lateral walls and a second base section connecting the walls, a modifiable cross-sectional profile which is initially open towards the gas exchange valve in a U-shaped manner the U-shape adopting a trough shape that has a protruding annular cavity. The trough shape adjacent to an annular cavity on the side of the valve-sided lifting section is M-shaped and has two free recesses open towards the gas exchange valve and extend respectively between one of the lateral walls and the second base section.

Abstract: A rocker arm for engaging a cam is disclosed. An outer arm and inner arm are configured to transfer motion to a valve of an internal combustion engine. A latching mechanism includes a latch, sleeve and orientation member. The sleeve engages the latch and a bore in the inner arm, and also provides an opening for an orientation member used in providing the correct orientation for the latch with respect to the sleeve and the inner arm. The sleeve, latch and inner arm have reference marks used to determine the optimal orientation for the latch.

Abstract: A rocker arm for engaging a cam is disclosed. An outer arm and inner arm are configured to transfer motion to a valve of an internal combustion engine. A latching mechanism includes a latch, sleeve and orientation member. The sleeve engages the latch and a bore in the inner arm, and also provides an opening for an orientation member used in providing the correct orientation for the latch with respect to the sleeve and the inner arm. The sleeve, latch and inner arm have reference marks used to determine the optimal orientation for the latch.

Abstract: To provide a variable valve operating apparatus for an internal combustion engine which can reduce a range where heat treatment is required, thereby favorably suppressing distortion which occurs in a camshaft during heat treatment, to a low level. A changeover mechanism is provided which includes a slide pin which is adapted to move within a predetermined reciprocating range thereby switching between operational states of a variable mechanism, and a guide rail provided in an outer peripheral surface of the camshaft and guides the movement of the slide pin from one end to a remaining end of the reciprocating range. A projection part which is engageable with the guide rail is provided in the slide pin.

Abstract: 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.

Abstract: 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 ?2 between an extension line of a line segment connecting a first fulcrum corresponding to a drive-eccentric-cam center and a second fulcrum provided on a rocker arm and a line segment connecting the second fulcrum and a third fulcrum provided on the rocker arm at a position different from the second fulcrum at a middle working-angle control mode is less than both an angle ?1 between the two line segments at a minimum working-angle control mode and an angle ?3 between the two line segments at a maximum working-angle control mode.

Abstract: An inner lever (1) for a switchable finger lever (2) of a valve train of an internal combustion engine is provided, having a box-like main part (5) with two lateral walls (6), which are connected at a first end (7) by a transverse bar (8), which intrinsically includes a driver surface (9) for a coupling slide that can be guided longitudinally by the outer lever (3), and opposite from the first end (7), the lateral walls (6) have two strongly crimped together, thin-walled arms (10), which each extend in the direction toward the second end (11) of the inner lever (1) to form a longitudinal bar (12). The arms contact each other with their inner sides (15), and between the lateral walls (6), a cam contact surface (16) can be provided. The inner lever (1) made from thin-walled steel sheet metal at least to a large extent using punch-bending techniques.

Abstract: The finger follower employs two independent lost motion arms and a rod which moves longitudinally to lock both arms. The rod is transversely mounted in the follower. In order to avoid premature locking, each arm has a chamfered surface on a top wall to force the rod out of engagement with the arm during upward movement of the arms, to protect premature movement of the rod from an unlocked position to a locked position.

Abstract: A shaft comprising functional elements, such as an assembled camshaft for an internal combustion engine, a method for producing such shafts, and internal combustion engines equipped with such shafts. The functional elements each have a bore and are produced separately from the shaft main body, and the bore is subsequently press fit onto the shaft body to attach the functional element in an axially and rotationally fixed manner. The shaft is also provided with at least one roller bearing that includes at least one undivided roller bearing element which is mounted on the shaft body between two functional elements, for example, by press fitting.

Abstract: A continuous variable valve lift (CVVL) device opens and closes a valve by pressing a rocker arm through a rotational force transmitted from a drive cam. The CVVL device includes a drive arm, which is pivotably mounted such that one side thereof presses a rocker arm, a variable arm, which is pivotably mounted, and pushes and pivots the drive arm when pivoted, and a transmission arm, which is coupled with a transmission roller, which is located between the drive cam and the variable arm, at one end thereof, and is pivoted such that a position where the transmission roller comes into contact with both the drive cam and the variable arm is changed.

Abstract: A device for hydraulic control of gas exchange valves of a reciprocating internal combustion engine which has slave cylinders in operative connection with one or more gas exchange valves and master actuators in operative connection with at least one cam provided with a basic and cam profile of a camshaft that is rotatably driven by the engine and can be hydraulically connected to the slave cylinders. The device also has a control device controlled by an actuating member, the device controlling the volume of hydraulic liquid fed to the slave cylinders, and at least one feed line, via which low pressure liquid from a pressure source can be fed to the device by means of at least one non-return valve. The actuators have displaceable vanes, a component carrying the vanes, and cells limited by walls. The vanes are in operative connection with the basic and cam profile of the cam.

Abstract: A valve train of an internal combustion engine with at least one camshaft (1) on which at least one rotatable cam (2) is arranged fixed in the axial direction, wherein a rotationally fixed connection of the at least one cam (2) with the camshaft (3) can be selectively established and released by an associated coupling-like locking device (3).

Abstract: An engine assembly may include an engine structure, a rocker arm assembly supported by the engine structure, and a camshaft. The rocker arm assembly may include a lever body, a support member coupled to the lever body, and a first roller member supported for rotation on the support member. The first roller member may include an annular body having first and second axial ends and an inner bore. The inner bore may receive the support member and include a groove extending from the first axial end to the second axial end. The groove may include a first portion at the first axial end rotationally offset relative to a second portion at the second axial end of the annular body. The first roller member may be rotated by rotation of the camshaft and the groove may be adapted to pump oil along the bore when the first roller member is rotated.

Abstract: A variable valve system includes a transmission mechanism T which transmits a valve actuating force to an inlet valve 11 and which varies a maximum lift amount of the inlet valve 11 and biasing members 60. A sub-cam 40 oscillatably supported on a holder 30 driven by a control member 70 has a roller 43 contacting the inlet cam 15a, a drive cam portion 46 outputting the valve actuating force, and acting portions A contacting the biasing members 60. The acting portions A are provided in the vicinity of the roller 43 so that biased contact points 45a1, 45b1 are positioned nearer to a cam contact point 43a than an oscillation center line Ls and that an acting line L1 of a biasing force is superposed on the roller 43 as viewed in the direction of the oscillation center line Ls.

Abstract: 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.

Abstract: 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.

Abstract: A fixation structure for a valve system rotation shaft of an internal combustion engine to support a camshaft with a cylinder head through the use of a lower cam holder and cam caps, which are formed separately from the cylinder head. The fixation structure eliminates the necessity of taking special vibration/noise control measures for a head cover thus preventing an increase in the cost, size, and weight of the head cover. A head external wall extends toward the head cover rather than toward a head middle surface in such a manner so as to cover the circumference of the lower cam holder fixed to a head middle surface. The connection to the holder fixation section is established with the base end of an external wall of the head cover abutted on the leading end of the head external wall.

Abstract: A valve actuation device may comprise a camshaft including first and second cams, the second cam having a larger lobe than the first cam. A valve lever includes a first follower component or surface adapted to follow the first cam and a second follower component or surface adapted to follow the second cam. The second follower component or surface may be mounted on or defined by an eccentrically-disposed device, which is rotatable relative to the first follower component or surface. When the rotatability of the second follower component or surface is locked by a latching device, the second follower surface translates the contour of the second cam into actuation of an engine valve and, when the second follower component or surface is freely rotatable, the first follower surface translates the contour of the first cam into actuation of the engine valve.

Abstract: A drive valve for an internal combustion engine comprising a variable hub profile for a valve having a lever supported on a variable support point by means of a switchable support element which provides possibilities for influencing the hub profile and alternatively and cumulatively, the cam is axially displaced such that various cam paths are active on the lever.

Abstract: A cam follower for a rocker arm includes a cylindrical outer ring (11) having an outer circumference surface abutting on a cam, a support shaft (6) to support the outer ring (11), a plurality of rollers (12) arranged in an annular region between the support shaft (6) and the outer ring (11), and a side plate (16) composed of a ring-shaped disk penetrated by the support shaft (6), opposed to an end face (15) of the roller (12), and having an outer diameter Ds smaller than an inner diameter Dr of the outer ring (11), in which the side plate (16) is arranged at each end of the roller (12), and a relationship Lr<Lk+2t is satisfied in which Lk represents a shaft length of the roller (12), Lr represents a shaft length of the outer ring (11), and t represents a thickness of the side plate (16).

Abstract: A mechanical adjuster that automatically increases or decreases or decreases valve clearance is provided that includes: a housing (12) having threaded portions (24, 26); a threaded member (14) thread-coupled with the threaded portion (24); a threaded member (16) connected to the threaded member (14) via mutual rotation prevention-couplings (32, 38) and thread-coupled with the threaded portion (26). When a load acting on the threaded member (14) is equal to or less than a valve closing load, valve clearance is decreased by an integrated rotation of the threaded members (14, 16). with a slip torque of the threaded member (14)>a self-locking torque of the threaded member (16). When a load acting on the threaded member (14) is close to or exceeds a valve opening load, valve clearance is increased by an integral rotation of the threaded members (14, 16) with the absolute value of a slip torque of the threaded member (14)>a self-locking torque of the threaded member (16).

Abstract: A continuous variable valve lift apparatus according to an exemplary embodiment of the present invention includes an input cam disposed to an input shaft, a first shaft in parallel with the input shaft, a first link connected with the first shaft, a second link rotatably connected to the first link, an output cam that is rotatably connected with the second link and configured with a contact portion contacting the input cam, a second shaft disposed to the output cam parallel with the input shaft, at least one valve unit that is opened and closed by the output cam, and a control part that controls a position of the second shaft.

Abstract: A variable valve system has a drive shaft having a drive cam, a rockable cam opening/closing an engine valve, a transmission mechanism converting torque of the drive cam into a rocking motion and transmitting it to the rockable cam, a control shaft, and a control cam. When the variable valve system varies a valve lift amount of the engine valve by changing the rocking fulcrum of the transmission mechanism, the rocking fulcrum during a small valve lift control is set in an area outside an arc locus drawn with the drive shaft being a center of the arc and passing through a rocking fulcrum position positioned at a maximum valve lift and also inside an arc locus drawn with a pivot of the one end side of the transmission mechanism being a center of the arc and passing through the rocking fulcrum position positioned at the maximum valve lift.

Abstract: A cam lobe of a camshaft has a base circle portion and a lifting lobe portion. A camshaft journal of the camshaft has first and second bearing portions that bear reaction forces from the base circle portion and the lifting lobe portion, respectively. The first bearing portion has an axial width smaller than that of the second bearing portion with at least a portion of an axial end surface of the first bearing portion facing the cam lobe being disposed away from the cam lobe relative to an axial end surface of the second bearing portion. The base circle portion has an axial width smaller than that of the lifting lobe portion with at least a portion of an axial end surface of the base circle portion facing the camshaft journal being disposed away from the camshaft journal relative to an axial end surface of the lifting lobe portion.

Abstract: An engine assembly may include an engine structure, a rocker arm assembly supported by the engine structure, a camshaft rotatably supported on the engine structure and engaged with the rocker arm assembly, and a valve member engaged with the rocker arm assembly. The rocker arm assembly may include a lever body having a first end engaged with the valve member and a second end defining a pivot point and having an opening therethrough, an arm assembly including a first end rotatably coupled to the first end of the lever body and a second end including a latch, and a locking mechanism located within the opening in the lever body and including a latch pin having a recess therein and a guide holder including a finger extending into the recess preventing rotation of the latch pin relative to the guide holder.

Abstract: The finger follower has an inner and outer body and a torsional lost motion spring positioned at its lash adjuster end of the outer body. The torsional lost motion springs have a short leg that abuts the outer body and a long leg that contacts the inner body. The torsional spring is located above the pivot point of the finger follower so as to provide a low mass moment of inertia and to reduce the weight over the valve stem end of the follower.

Abstract: A device for actuating a valve of a valve assembly of an engine and for adjusting a stroke of the valve, may include a camshaft including a cam, a working curve member provided pivotably about the camshaft for actuating the valve, a lever holder which is provided pivotably about the camshaft, a lever, one end of which is spaced from the camshaft with a predetermined distance and pivotally coupled to the lever holder, and a connecting link pivotally connected to the lever and the working curve member.

Abstract: A lubricating device comprises a cam shaft, plural cam portions for each valve provided at the cylinder head, a valve driving mechanism to change a rotational movement of the cam portion to an opening-and-closing movement of the valve via a slide member on which a peripheral surface of the cam portion slides, an oil passage of the cam shaft, a nozzle provided at either one of the cam portions to open at the peripheral surface of the cam portion and connect to the oil passage of the cam shaft, and a wall body having a recess portion. The recess portion collects lubricating oil ejected out of the nozzle and guides the lubricating oil collected to the peripheral surface of the other cam portion when the one cam portion is located in a position in which the nozzle is not directed to the slide member.

Abstract: A switchable finger lever (1) of a valve train of an internal combustion engine, said finger lever (1) comprising an outer lever (2) between whose arms (3) an inner lever (4) extends, a support (9) for at least one gas exchange valve being arranged on one end (7), said inner and outer levers (4, 2) extending on a common axle (10) in the region of said one end (7), said finger lever (1) further comprising a lost motion spring means (11) acting between said inner and outer levers (4, 2), said outer lever (2) possessing on the undersurface (8) on another end (12), a contact surface (13) for a support element, a coupling element (14) is arranged above or laterally of said contact surface (13), which coupling element (14), for realizing coupling, can be brought partially into engagement with an entraining surface (15) of an adjoining crossbar (16) of the inner lever (4), wherein the inner lever (4), starting from its crossbar (16) on the another end (12), merges into a box-like open center portion (17) having two

Abstract: A variable valve mechanism for an engine includes: a rocker shaft; a first rocker arm rotatably supported by the rocker shaft, for transmitting displacement of a first cam to a valve; a second rocker arm rotatably supported by the rocker shaft, for transmitting a displacement of a second cam to the valve; and a switching mechanism for switching a transmitting state and a non-transmitting state. The first rocker arm has a pair of first arm portions and a recess portion in which an upper end of the valve is inserted at an end portion of each of the first arm portions. The second rocker arm has a second arm portion disposed between the first arm portions. The first rocker arm is restricted from movement in an axis direction of the rocker shaft when an inner sidewall of the recess portion is in contact with the upper end of the valve. The second rocker arm is restricted from movement in the axis direction when the second arm portion is in contact with the first rocker arm.

Abstract: In a V-type engine, intake and exhaust rocker arms in each bank are arranged in a substantially inverted-V-shape in a plan view, so that side end portions of corresponding intake and exhaust push rods are positioned adjacent to each other. Slipper portions of first and second intake cam followers have end portions at one end along the axial direction of a camshaft protrude respectively in opposite directions to each other so that they face each other across an intake cam therebetween. Slipper portions of first and second exhaust cam followers have end portions at one end along the axial direction of the camshaft protrude respectively in opposite directions to each other so that they face each other across an exhaust cam therebetween. This reduces the distance between the push rods in each bank to provide a compact valve-operating device.

Abstract: A rocker arm (1) made of thin-walled sheet steel which rocker arm is intended for a suspended arrangement together with other like rocker arms under a girder-like carrier (2) of a valve train of an internal combustion engine, the rocker arm having an inverted U-shaped profile, a support (7) for a gas exchange valve is formed on one end (6) of an underside (5) of a crossbar (4) of the rocker arm, an upper side (9) of the crossbar (4) is stamped in the region of the support (7) by a stamping and extrusion molding method toward the underside (5), so that an M-like cross-section with a longitudinal channel (10) formed on the upper side (9) is obtained and at its other end (11), the rocker arm (1) has a fork-shaped, open configuration and merges into a region (12) which is angularly bent towards the underside (5) and on which a roller (13) forming a cam contacting surface is arranged, said rocker arm (1) of this type possesses, among other things, an excellent stiffness, is simple to manufacture and has a small de

Abstract: 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.

Abstract: The finger follower has an inner and outer body and a torsional lost motion spring positioned at its lash adjuster end of the outer body. The torsional lost motion spring has two helical parts each with a short leg that abuts the outer body and a long leg that contacts the inner body. The torsional spring is located above the pivot point of the finger follower so as to provide a low mass moment of inertia and to reduce the weight over the valve stem end of the follower.

Abstract: A variable valve lift apparatus may include a camshaft having an input cam, a rocker arm shaft disposed in parallel with the camshaft with a distance therebetween, a shaft carrier with a camshaft and a rocker arm shaft, a rocker arm that is mounted on the rocker arm shaft with a first roller contacting the input cam, a first link connected to the rocker arm, an amplification lever with a middle portion thereof connected to the first link and the shaft carrier, a second link connected to the amplification lever, an output cam mounted on the camshaft, one side of the output cam connected to the second link, and a profile portion formed at an exterior circumference thereof, a variable driveshaft rotating the shaft carrier by a predetermined angle, and a valve moved by the profile portion with rotation of the output cam.

Abstract: In order to produce a variable valve lift device for the lift adjustment of the gas-exchange valves of an internal combustion engine, by means of which with adjustment forces and holding forces, independently from whether said holding forces and adjustment forces are applied mechanically, hydraulically or electrically, with an adjustment of the valve lift being as cost-effective as possible, and with maximum accuracy of the adjustment or control of the valve lift to be taken between the individual cylinders of a multi-cylinder internal combustion engine, and, moreover, the adjustment possibility of the valve lift of the valves of an internal combustion engine with several cylinders is obtained within smallest tolerances, it is suggested that a valve lift device (1) has a rotatable eccentric shaft (3), which consists of several eccentrics (4, 5) and whereby all possible contours of the eccentrics (4, 5) are positioned within a circle, which is formed by means of the external diameters of a bearing (6, 7) of th

Abstract: 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.

Abstract: A lubricating system for a valve operating system includes a valve operating system configured to reciprocate a valve for substantially opening and closing a port connected to a combustion chamber of an engine, and an ejecting device provided with an outlet from which a lubricating liquid is ejected. The valve operating system includes a drive cam, a driven member configured to contact the drive cam, a pivot member which is attached to the driven member and is configured to transmit movement of the driven member to the valve, and a relative position changing device configured to change relative positions of the driven member and the pivot member. The outlet of the ejecting device is oriented to face sliding surfaces of the driven member and the drive cam at least in a period which is a part of one rotation of the drive cam.

Abstract: A valvetrain mechanism of an engine, including a drive shaft configured to rotate in synchronization with the engine, a link arm having a large end and a small end, the drive shaft being inserted into and passed through the large end, a valve lift control shaft disposed parallel to the drive shaft and having an eccentric portion, an oscillating arm disposed rotatably at the eccentric portion of the valve lift control shaft and interconnected with the small end of the link arm via a first rotation support point, a link rod interconnected with the oscillating arm via a second rotation support point positioned at a same side as the first rotation support point with respect to the valve lift control shaft, and an oscillating cam interconnected with the link rod via a third rotation support point and operated correspondingly with an operation of the drive shaft to thereby open a valve.