Abstract: A gasket provided in a gasket groove, receives the force that acts in the direction in which two pressure-adjusting oil passages are aligned in line, and the magnitude and direction of this force change as the difference between the hydraulic pressures in the pressure-adjusting oil passages varies. However, because the opening of a hydraulic oil supply passage is located on an imaginary line extending through between the openings of the two pressure-adjusting oil passages, pressure is applied from the hydraulic oil supply passage to the gasket, whereby constant and large frictional force occurs between the gasket and the side wall of the gasket groove. Thus, the gasket is firmly retained in the gasket groove, whereby the vibration of the gasket is suppressed.

Abstract: A rocker arm supported by a support portion of an engine and to be driven by a cam includes a sheet-metal rocker arm body manufactured by plastic working and including a cam follower, a fulcrum portion manufactured by cutting and including a through hole supplying lubricant, and a lubricant discharging hole. The cam follower includes a first slide-contact surface being in sliding contact with the cam. The lubricant discharging hole is defined by an outer surface of the fulcrum portion and an outer surface of the sheet-metal rocker arm body and in communication with the through hole. The lubricant discharging hole biases the lubricant supplied from the through hole in a direction toward the first slide-contact surface.

Abstract: A rocker arm configured to be supported by a support portion of an internal-combustion engine and to be driven in a swinging manner by a cam. The rocker arm includes a rocker arm body including a cam follower having a first slide-contact surface, wherein the first slide-contact surface is in sliding contact with the cam, a fulcrum portion including a second slide-contact surface, wherein the second slide-contact surface swingably is in sliding contact with respect to the support portion, and a lubricant discharging portion for biasing a lubricant supplied from the fulcrum portion in a direction toward the first slide-contact surface and discharging the lubricant. The fulcrum portion penetrates the rocker arm and is fastened to the rocker arm body. The fulcrum portion has a through hole supplying the lubricant to the lubricant discharging portion through the rocker arm body.

Abstract: In an internal combustion engine, a lubricated camshaft assembly is in a cam chamber formed between a cylinder head and a cylinder head cover. The cylinder head includes outer bolt-receiving holes in which selected head bolts are inserted, and which are outside of the cam chamber. An oil discharge passage in the cylinder head has an inlet opened into the cam chamber, and an outlet opened into an outer bolt-receiving hole. The inlet of the oil discharge passage is disposed on one lateral side of the cam chamber. An opening part of a timing chamber is on the other lateral side of the cam chamber. An endless loop timing chain or belt is disposed inside of the timing cover, for transmitting the power of a crankshaft to the camshaft. A vehicle, which may be a four-wheeled all-terrain vehicle, may incorporate the engine and cylinder head as described.

Abstract: A variable valve timing control apparatus of an internal combustion engine has a drive rotary member, a driven rotary member, and an electric motor which rotates with the drive rotary member and changes a rotational phase of the driven rotary member relative to the drive rotary member through a current application to a coil. The electric motor is covered with a cover member with a clearance interposed therebetween, and a bearing member is installed between an outer periphery of the electric motor and an inner periphery of the cover member for rotatably supporting the electric motor. The bearing member defines a space portion between an end surface, in a rotation shaft direction, of the electric motor and an opposing inner end surface of the cover member, and the space portion is supplied with lubricating oil by a lubricating oil supplying mechanism.

Abstract: The inner surface of an oil passage in a member which is made as a die-cast formed product is made as a molded surface. By this structure, permeation of oil from the inner surface of the oil passage into the thickness portion of the member which is made as a die-cast formed product, and leakage thereof out to the exterior, is prevented.

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: A device (1) for modifying the control times of an internal combustion engine having a drive wheel (13), an output element (4), and a swashplate gear mechanism (2) is provided. The torque of the crankshaft is transmitted to the drive wheel (13) via a primary drive and is transmitted on to the output element (4) via the swashplate gear mechanism (2), with the output element (4) being connected in a fixed manner to the camshaft (11). The swashplate gear mechanism (2) allows the drive wheel (13) to be rotated relative to the output element (4) allowing a continuous phase shift of the camshaft (11) relative to the crankshaft. In order carry out this function, the drive wheel (13) is rotatably supported by the output element (4). An inexpensive and easy way to supply the swashplate gear mechanism (2) and the radial bearing (28) with lubricant is provided.

Abstract: A rocker box, pushrod assembly, oil delivery system, tappets and tappet guides are provided for an engine, particularly a shovelhead motorcycle engine. The rocker box includes a separable upper portion and lower portion with a seal for sealing the upper portion and lower portion when coupled together. The pushrod assembly includes an adjusting unit that collapses into a pushrod shaft. The oil delivery system includes an oil passageway(s) in a rocker shaft of a rocker arm assembly, and at least one of an oil passageway(s) in a rocker box and an oil passageway(s) in a pushrod assembly.

Abstract: In one embodiment the invention is a system and method for bonding parts to an engine or a transmission which comprises contacting with the part or the location of the engine or the transmission to which the part is to be attached an adhesive comprising a polythiol ether having two or more reactive groups capable of reacting with a curing agent and a curing agent for the polythiol ether and thereafter contacting the part with the engine or transmission such that the adhesive is disposed between them and curing the adhesive.

Abstract: A valve mechanism drives an exhaust valve with a valve lifter and an exhaust camshaft. Oil is supplied to a journal surface of the camshaft and a bearing supporting the camshaft journal surface through an axial oil passage formed in the camshaft. The bearing is defined by a cam cap and a bearing main body. An oil collecting recess is defined between cam cap and the bearing main body. An auxiliary delivery passage extends from the oil collecting recess to a sidewall of the bearing that is located adjacent to the valve lifter. A guide wall is formed in the sidewall to lead oil from an opening of the auxiliary delivery passage to a part of the valve lifter that generates a striking noise in the absence of buffering oil.

Abstract: A stay for keeping an oil control valve fastened to a sleeve extends across the outer surface of a head cover from the oil control valve and is fixed by a screw. Thus, the OCV is removable from the sleeve without dismounting the head cover from the cylinder head by loosening the screw from the outside of the head cover and detaching the stay.

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: An engine valve operating system is provided in which a rocker arm (63) linked and connected to an engine valve (19) and has a cam-abutting portion (65) to abut a valve operating cam (69) is turnably connected, via first and second connecting shafts (64, 66), to one end of a first link arm (61) turnably supported on an engine body (10) and one end of a second link arm (62) turnably supported by a displaceable movable shaft (68a). Also, oil supply means (58) which supply oil to the upper connecting shaft (64) of first and second connecting shafts (64, 66) are fixed to the engine body (10). This makes it possible to implement an engine valve operating system which is compact in size, ensures follow-up ability of the valve opening/closing operation, has a simple lubricating structure with a reduced number of parts, and ensures smooth valve operation while allowing the lift amount of the engine valve to be varied continuously.

Abstract: An oil control valve for a variable cam phaser has a secure steel-to-steel fit between the secondary plate of the bobbin and the frame owing to a shoulder formed in the frame against which the secondary plate abuts, and also owing to an o-ring disposed between the bobbin and frame. This prevents oil from leaking into the electrical connector of the valve, which advantageously can be oriented parallel to the axis of the valve.

Abstract: A switchable valvetrain system is provided having a control unit and a pressure regulator valve responsive to control signals from the control unit. A pressurized fluid source is provided in communication with the pressure regulator valve. A switchable valvetrain component having a latching mechanism and lubrication circuit in selective communication with the pressurized fluid source through the pressure regulator valve is also provided. The pressure regulator valve is operable to selectively and variably communicate fluid pressure from the pressurized fluid source to the latching mechanism and the lubrication circuit in response to control signals from the control unit. A method of operating the switchable valvetrain system is also provided.

Abstract: An electrohydraulic control module is provided for making available a compressed fluid, especially compressed oil for actuators, which are used for actuating control units, for example, for switching gas-exchange valves of an internal combustion engine on and off, with a control housing, which is attached to a connection part of the internal combustion engine and which has electrical switching valves that are connected to an oil supply line and to control oil lines leading to the actuators. The production and assembly expense of the electrohydraulic control modules is reduced in that an intermediate housing (6), which is injection molded from plastic and which has at least the oil supply line and the control oil lines (17), is clamped between the connection part (5) and the control housing (7).

Abstract: A variable nozzle area jet pump is provided having a nozzle-sealing member resiliently urged to form a sealing closure. The sealing member is part of a normally non-passing pressure control valve that recirculates excess fluid back to the inlet of a positive displacement fluid pump. The fluid is recirculated with elevated pressure after a threshold fluid pressure is exceeded. The disclosed system provides for energy conservation and pump cavitation speed increase. The system may be integrated with an engine balance shaft module so as to provide low cost robustness to low speed gear noise emissions by application of the oil pump's drive torque to at lease one gearset.

Abstract: A cam shaft assembly is provided which includes a rolling bearing providing for effective oil feeding to a raceway. The assembly includes: a shaft 1; the rolling bearings 3 rotatably supporting the shaft 1; and cams 2 fitted on the shaft 1. The rolling bearing 3 includes a circumferential groove formed on an outer periphery of an outer ring 5 and an axial groove extending from place in the circumferential groove and opening on a lateral side of the outer ring 5.

Abstract: An improved cam shaft configuration for internal combustion engines is provided wherein the oil is efficiently diverted from the camshaft cap to adjacent camshaft lobes. A reorientation of the camshaft oil diverter improves the distribution and increases the quantity of oil flow without building in additional oil passages to supply oil to cams, that would introduce additional expense without substantially alleviating existing prior art lubrication deficiency problems. The invention obviates the known prior art configurations that suffer from the drawback of insufficient distribution of lubricating oil to adjacent camshaft lobes that is effected by oil diverter configurations.

Abstract: The present invention relates to a mounting module in which an oil control valve for tappet control is mounted in a cylinder deactivation engine. The mounting module of the invention is separately fabricated and coupled to the cylinder head and has various oil passages connecting the oil paths between the oil control valve and the cylinder head with each other and thereby the die structure for molding the cylinder head is simplified. Because of its separately fabricating process it is possible to design the part freely and in a small size and to reduce the cost of die, material, manufacturing and its weight as well. Furthermore, the number of related parts such as steel ball, taker plug, etc. and unnecessary portions in the shape are considerably reduced, thus providing an optimized structure and reducing the manufacturing cost as well as its weight.

Abstract: An oil distribution system for an internal combustion engine comprising a longitudinal bore in the engine head or block connected to an engine oil pump. A longitudinal insert is disposed in the engine bore, the insert being formed and disposed to define segmented galleries within the bore, a first oil gallery being in communication with the engine camshaft bearings and a second oil gallery being in communication with switchable cam followers in the engine. The two galleries are separated but connected by one or more oil control valves. Thus, the camshaft bearings are exposed to high engine oil pressure at all times independent of the switchable cam followers; likewise, the switchable cam followers may be latched and unlatched at any time or condition deemed beneficial for engine operation without jeopardizing lubrication sufficiency to the camshaft bearings.

Abstract: A sealing arrangement for attachment to the contact surface of a device which is to be sealed includes one area opposite the contact surface containing at least two stiffening elements which are arranged in overlapping relation to one another at least at one point and which are securely connected to one another in the overlapping area by an elastomer part which is between the stiffening elements.

Abstract: A vertical internal combustion engine E has a crankshaft 18 enclosed in a crank chamber 20, a belt-drive transmission mechanism 50 held in a belt chamber 63 and including a rubber belt 53 for transmitting power of the crankshaft 18 to a camshaft 24 in a valve train 23, and a transmission case 60 defining the belt chamber 63. The belt chamber 63 communicates with the crank chamber 20 by way of vent holes 70 and 71, the transmission case 60 is provided with an internal wall Wi disposed between the vent holes 70 and 71 and the belt 53 in the belt chamber 63 to deflect the flow of an oil-containing gas flowing from the crank chamber 20 into the belt chamber 63 such that the oil-containing gas flows in directions deviating from a direction toward the belt 53. The belt 53 is lubricated with oil in the oil-containing gas. The belt 53 is pre-vented from being excessively exposed to the oil-containing gas from the crank chamber 20 to extend its life.

Abstract: An outboard engine unit includes a single lubricating oil supply tube for supplying lubricating oil to a valve-operating chain. The valve-operating chain is suspended across a drive sprocket provided to a crankshaft and a driven sprocket provided to a camshaft. A supply tube is connected to a main gallery that is linked to a main oil channel positioned in an area adjacent to the crankshaft.

Abstract: To prevent a drop in a lubricating oil supply pressure in a valve train from occurring by disposing a lubricating oil supply path for the exclusive use of the valve train without allowing the lubricating oil to flow through an oil gallery, thereby securing a sufficient amount of supply of the lubricating oil in the valve train to enhance lubrication efficiency. A feed pump rotating with a crankshaft is disposed at a leftward end of the crankshaft. Lubricating oil supplied from the feed pump flows through an oil cooler and an oil filter. Part of the lubricating oil is supplied through a lubricating oil supply path to an oil gallery and to journals, crankpins, and the like of the crankshaft. The other part of the lubricating oil is supplied through lubricating oil supply paths for the exclusive use of the valve train.

Abstract: An oil pressure control apparatus which includes a source of hydraulic pressure introducing the hydraulic pressure to a hydraulic actuator which is actuated by hydraulic pressure, a fluid passage which is connected between the source of hydraulic pressure and the hydraulic actuator for introducing and discharging hydraulic pressure from the source of hydraulic pressure to the actuator, a control valve which is disposed in the fluid passages for controlling the hydraulic pressure and a filter is disposed in a position that is between the actuator and the control valve. Thereby, the control valve is capable to be operated smoothly.

Abstract: An actuator for a valve lift controller comprises a case forming a first and second spaces therein. The first space is supplied with lubricating fluid. The actuator further comprises a feed screw mechanism including a cylindrical spindle and a screw, and converts a rotational movement of the spindle to a linear movement of the screw. The spindle includes a first end portion open to the first space and a second end portion closed to the second space therein. The screw straddles borders between an interior of the spindle, the first space, and an external space. The actuator includes a motor unit which is located in the second space and rotates the spindle. The actuator further includes a sealing member sealing a gap between the case and the spindle to separate the first and second spaces.

Abstract: An oil supply passage of a cylinder head increases design freedom of cylinder heads. The oil filter variously sets the oil supplying position through which oil enters into an oil filter. This improves fuel consumption by simplifying the oil supply passage of the cylinder head, reduces power loss of an oil pump, and decreases the size and weight of the cylinder head.

Abstract: A resin cylinder head cover includes an attaching portion and a sleeve. The attaching portion is formed of resin, and is a portion of the cylinder head cover to which the oil control valve is to be attached. The sleeve is embedded in the attaching portion. The sleeve has an interior space that permits the oil control valve to be accommodated therein and oil holes. Each oil hole is selectively connected to one of ports of the oil control valve accommodated in the interior space of the sleeve. The sleeve is formed of material having higher rigidity than the resin forming the attaching portion. Therefore, the cylinder head cover maintains highly reliable attachment of an oil control valve without a large number of high precision machining steps and prevents deformation of the attaching portion.

Abstract: A cylinder head of an internal combustion engine is provided with a cylinder head housing and with a divided camshaft bearing rail having a lower part, which comprises lower bearing blocks, and having an upper part, which comprises upper bearing covers. In addition, the cylinder head has a cylinder head cover. The upper part of the camshaft bearing rail is designed so that it is closed like a hood, in particular, in the area between the bearing covers.

Abstract: An engine crankshaft includes a split crankshaft journal that includes offset connecting rod journals for two connecting rods. Oil supply systems disposed on opposite axial sides of the crankshaft journal each lubricate a corresponding one of the connecting rod journals. The oil supply systems are either axial or peripheral oil supply systems that do not require oil to be supplied to the crankshaft through the main crankcase bearings. Consequently, the oil supply systems sufficiently lubricate each connecting rod journal without requiring weakening holes or grooves in the main crankcase bearings.

Abstract: A lubricating structure for an OHC internal combustion engine including a cam holder, wherein an oil feed path for feeding a lubricant to an upper end of a valve stem is formed integrally with the cam holder so as to project therefrom.

Abstract: A lift and operating angle varying mechanism is arranged to vary an intake valve operation angle and an intake valve lift of the engine continuously by rotating a control shaft with an actuator disposed at an end of the control shaft which is rotatably supported by a plurality of bearings. A lubricating oil is supplied to the bearings so as to reduce nonuniformity in temperature distribution of the control shaft in the longitudinal direction.

Abstract: Valve train with hydraulic lash adjustment in the entire timing train, in which oil is delivered from the oil supply space of the hydraulic valve-lash adjuster (HLA) to the valve rocker arm via a hollow push rod, a choke limiting the oil discharge, the choke being designed in such a way that it seals off the push rod bore at the top when the oil pressure drops, that is to say when the engine is shut off, so that the oil is retained in the push rod bore (12) until—after the engine is started—the choke body (15, 22) opens up the discharge opening again.

Abstract: An oil supply means is provided to supply the center portion of a rotating part of an Oldham coupling with oil. The oil spreads from the center of rotation to the outside of the Oldham coupling and makes it possible to prevent the Oldham coupling from wearing. A recess is also provided to direct the oil supplied from an engine to the inward portion of the Oldham coupling. Accordingly, the oil is supplied all over an Oldham projection so that it is possible to prevent the frictional wearing of the Oldham projection disposed inside the Oldham coupling.

Abstract: To provide an oil passage structure for an engine in which a tensioner arm is in sliding-contact with a cam chain for speed-reducing a rotational power of a crankshaft by half and transmitting the resultant power to camshafts for driving an intake valve and an exhaust valve, and a screw-type lifter having a lifter rod with its one end being in contact with the tensioner arm is provided in a cylinder head, wherein the oil passage structure is intended to certainly feed oil to the screw type lifter while preventing the reduction in pressure of oil fed to the cylinder head without increasing the discharge pressure of an oil pump. An oil passage to which oil is fed from an oil pump is formed so as to extend around a cylinder head, and the downstream end of the oil passage is in communication with a screw type lifter.

Abstract: In an oil flow control valve (OCV) according to the present invention, a first volume varying chamber is adapted to communicate with a second volume varying chamber through a second plunger breathing path, and the second volume varying chamber is adapted to communicate with a first breathing hole through an intra-plunger breathing path, an intra-shaft breathing path, and a third volume varying chamber. That is, the breathing path to the second volume varying chamber is long and the volume thereof is large, and the breathing path to the first volume varying chamber is still longer and larger in its volume. Consequently, the amount of foreign matters getting into the first and second volume varying chambers can be decreased and therefore it is possible to prevent the occurrence of an operation defect of the OCV.

Abstract: An engine having an oil circuit and method of communicating oil within an engine are disclosed. The engine includes a crankcase, a pump, and a camshaft having a first channel extending between first and second ends of the camshaft, where lubricant is provided from the pump to the first channel at the first end and communicated by way of the first channel to the second end. The engine also includes a crankshaft, a second channel communicating at least some of the lubricant delivered to the second end of the first camshaft to a crankshaft bearing, and a third channel within the crankshaft that receives at least some of the lubricant communicated by the second channel and communicates at least some of the lubricant to a crankpin bearing on the crankshaft. In some embodiments, lubricant is communicated by the third channel to an eccentric bearing configured to support a balance weight.

Abstract: A lubrication system for an internal combustion engine having a pressure increasing valve and a pressure regulator valve to optimize oil flow through an engine to increase engine efficiency. The lubrication system includes an engine driven oil pump connected to supply pressurized oil through a main oil feed to a main bearing gallery, a cam gallery, a cam phaser and switching valve lifters. The pressure increasing valve connected between the main bearing gallery and the cam gallery restricts oil flow to the cam gallery to raise oil pressure supplied to the cam phaser. The pressure regulator valve connected between the pressure increasing valve and the cam gallery to control oil pressure supplied to the switching lifters for cylinder deactivation or stepping valve train operation. The optimization of oil flow allows the engine to use a smaller oil pump and thereby increase engine efficiency while providing for actuation of the cam phaser or the switching lifters over the full engine speed range.

Abstract: A plurality of oil passages are formed in a shaft body of a rocker shaft, which partially constitutes a valve drive system of an internal combustion engine. A bolt hole is formed in the shaft body in such a manner as to substantially perpendicularly intersect the axis of the shaft body. A bush is fitted into the bolt hole in such a manner as to prevent the bolt hole from establishing communication between the plurality of oil passages. A bolt is fastened through the bush to thereby fix the rocker shaft on a cylinder head. This structure improves the support rigidity of the rocker shaft and the dynamic characteristics of the valve drive system, and reduces the number of components and the number of working man-hours.

Abstract: An internal combustion engine is provided with at least two cylinder banks whose cylinder heads are sealed by cylinder head covers. To ventilate the crankcase from the blow-by gases, ventilation lines are connected to the cylinder head covers and communicate with a negative pressure source, e.g., an intake pipe. The inside of the cylinder head cover is provided with structure for pre-separating the oil from the blow-by gases. An oil separation chamber is equipped with an inlet and an outlet opening, each as a part of the crankcase ventilation in the cylinder head covers. The oil separation chambers communicate with the respective camshaft space through their inlet openings. This arrangement ensures reliable crankcase ventilation in which a portion of the oil carried along by the blow-by gases can already be separated in the cylinder head cover and returned to the camshaft spaces.

Abstract: An internal combustion engine includes a hydraulic system with a hydraulic pump. A lubricant system for moving parts of the engine is also provided, which includes a lubricant pump. To enable making the engine smaller, it is proposed that the hydraulic pump is connected to the lubricant system in such a way that it can be lubricated by the lubricant.

Abstract: An intake valve for a combustion engine having an oil reservoir and adapted for combusting fuel is disclosed. The intake valve includes a valve stem and a valve guide arranged proximate the valve stem. The valve guide and valve stem define a first clearance dimension and a second clearance dimension between an inner surface of the valve guide and an outer surface of the valve stem, wherein the second clearance dimension is greater than the first clearance dimension. The second clearance dimension is sized to accept a volume of oil quantified to dissolve high boiling fraction from the fuel to lessen the accumulation of high boiling fraction between the valve stem and the valve guide.

Abstract: The invention concerns a control device for adjusting the relative angular position of a driven shaft, particularly a camshaft of an internal combustion engine, said device comprising a drive pinion that is rotatably connected to the shaft, an adjusting element (1) for the angular adjustment of the drive pinion relative to the shaft, two chambers (2, 3) that are alternately supplied with hydraulic fluid and a control valve (6) for actuating the adjusting element (1), said control valve being connected to the chambers (2, 3) of the adjusting element (1) through pressure medium channels (4, 5). The control valve (6) comprises a valve body (7) that has two working connections A and B for the pressure medium channels (4, 5), a delivery connection P for the supply of hydraulic fluid and a discharge connection T for the discharge of hydraulic fluid, and the control valve (6) further comprises a sliding valve control piston (8) for setting different hydraulic resistances W between the individual connections.

Abstract: A VA apparatus for an internal combustion engine includes a pair of VO cams disposed on both sides of a crank cam and having inside end faces opposed to each other, wherein the inside end faces have therebetween an annular portion of the crank arm supported in a sandwiched way from the axial direction of a driving shaft.

Abstract: A lubricating structure for an OHC internal combustion engine including a cam holder, wherein an oil feed path for feeding a lubricant to an upper end of a valve stem is formed integrally with the cam holder so as to project therefrom.

Abstract: A lubrication system for an internal combustion engine having valves to optimize oil flow through an engine to increase engine efficiency. The lubrication system includes an engine driven oil pump connected to supply pressurized oil through a main oil feed to a main bearing gallery, a cam gallery, a cam phaser and switching valve lifters. A pair of pressure increasing valves connected to the main bearing gallery and the cam gallery selectively restrict oil flow to the cam gallery and the main bearing gallery to raise oil pressure supplied to the cam phaser. A pressure regulator valve is connected to the cam gallery to control oil pressure supplied to the switching lifters for cylinder deactivation or stepping valve train operation. The optimization of oil flow allows the engine to use a smaller oil pump and thereby increase engine efficiency while providing for actuation of the cam phaser or the switching lifters over the full engine speed range.

Abstract: In a valve operating apparatus, torque is transmitted from an eccentric drive cam attached to a drive shaft through a multinodular-link motion-transmission mechanism including a link arm, a rocker arm, and a link rod to a rockable cam to cause an engine valve to open and close. Also provided is a control cam whose geometric center is displaced from a control shaft. By way of eccentric rotary motion of the control cam, a valve lift of the engine valve is variably controlled. Lubricating oil supplied from an oil passage formed in the drive shaft via a first communicating passage formed in the drive cam into a clearance between the link arm and the drive cam, is forcibly fed via a second communicating passage into a pivotally linked portion between the link arm and the rocker arm by oscillatory pumping action created by eccentric rotary motion of the drive cam.

Abstract: In a device for hydraulically changing the angle of rotation of a camshaft relative to a drive wheel of an internal combustion engine, including a hydraulic adjusting arrangement which is arranged between the drive wheel and the camshaft and is connected to a fluid circuit of the internal combustion engine, such that the fluid is admitted to the adjusting arrangement via an on/off valve, and the camshaft is mounted in camshaft bearings, an on/off valve for controlling the fluid supply to the adjusting arrangement is at least partially integrated in one of the camshaft bearings.