Abstract: A valve actuation system for an engine includes a rotatable camshaft, an injector actuation linkage, and a valve actuation linkage. The valve actuation linkage includes a valve lifter, a valve pushrod, and a rocker arm. At least one of a rocker arm center plane defined by the valve rocker arm or a lifter roller center plane defined by the valve lifter is spaced an offset distance from a pushrod axis, providing an increased contact width between an injector roller in the injector actuation linkage and one of a plurality of cam lobes of the camshaft. The valve lifter includes a fork defining a center plane spaced an offset distance from a center axis of the valve lifter. A rocker arm includes a screw bore offset relative to a rocker arm center plane.

Abstract: A valve drive for a cylinder head of an internal combustion engine has a camshaft which is rotatably mounted in a first and a second camshaft bearing and which includes at least one cam with a first cam curve and a second cam curve that differs from the first cam curve. A gas exchange valve can be actuated by the first or the second cam curve via a cam follower. A camshaft section is provided, by which the cam can be moved by an actuator such that the gas exchange valve can be actuated either via the first or the second cam curve via the cam follower. The camshaft and the cam have a fixed position relative to each other. The camshaft can be axially moved in the first and the second camshaft bearing. The camshaft bearings consist of a camshaft bearing block and a common bearing frame. A lubricant supply bore is provided which opens into a fourth lubricant groove in the bearing frame in order to supply the bearing points with lubricant.

Abstract: A valve mechanism includes a valve, a camshaft, a fixed support, an intermediate swing arm and a supporting base. The fixed support is provided with a connecting-portion via hole running from top to bottom, two oil passages are defined in a connecting portion, and each of the oil passages is connected with the connecting-portion via hole and a corresponding intermediate swing arm shaft hole. The supporting base defines first and second oil feeding passages therein, the first supporting-base oil feeding passage is communicated with the connecting-portion via hole, and an upper end of the second supporting-base oil feeding passage extends to a base-body camshaft supporting portion of the supporting base. An engine and a vehicle are also provided.

Abstract: Side surfaces of an end cam cap and a pair of side surfaces of a recess for cam cap form two cross-sectional area gradually changing gaps therebetween. A gasket is filled between an inner surface of the recess for cam cap and an outer surface of the end cam cap. The inner surface includes the side surfaces of the recess for cam cap and the outer surface includes the side surfaces of the end cam cap.

Abstract: An anti-rotation guide for a lifter in an overhead valve valvetrain. The anti-rotation guide includes a plug having two lobes connected through a neck region. A first lobe of the plug is held within a bore in the lifter. The bore forms an opening at the edge of the lifter through which the neck of the plug emerges. The bore in the lifter accommodates a first lobe of the plug that is wider than the opening in the edge of the lifter, whereby the plug is shaped to prevent its slipping from the lifter through the opening. The lifter reciprocates in a first bore in the cylinder head. The second lobe of the plug extends outward from the lifter into a second bore formed in the cylinder head and adjoining the first bore. The second lobe reciprocates in the second bore and limits rotation of the lifter.

Abstract: Provided is a V engine which uses common cylinder heads, and permits favorable arrangement of oil passages so as to accommodate various oil regulating features that are required to operate valve property varying mechanisms. Each end of each cylinder head is formed with a plurality of distribution oil passages opening out at an upper surface of the cylinder head for supplying oil pressure from a main gallery to a valve actuating mechanism. A pair of oil passage connecting members internally defining mutually different connecting oil passages are attached to the upper surfaces of the corresponding end parts of the respective cylinder heads.

Abstract: A cylinder head and push rod tube configuration for an internal combustion engine is disclosed. The cylinder head includes a first end comprising a recessed rocker arm cavity. The cylinder head also includes a second end opposite the first end and defining an upper end of a combustion chamber. The recessed rocker arm cavity has a lower surface with a pair of push rod tube bores therethrough. The second end of the cylinder head has a pair of push rod tubes positioned in the push rod tube bores between the recessed rocker arm cavity and the second end. An intake port and an exhaust port each extend through the cylinder head to the combustion chamber.

Abstract: A holding structure of an oil control valve includes an oil control valve, a cam holder, and a head cover. A valve portion is provided on a second end side of the oil control valve opposite to a first end side in a longitudinal direction. The valve portion is configured to switch oil passages by driving a solenoid portion and has a drain hole at a shaft end portion of the valve portion. The cam holder is attached to a cylinder head of an internal combustion engine and rotatably supports a camshaft of the internal combustion engine. A valve portion side of the oil control valve is embedded in the cam holder and supported by the cam holder. An axis of the oil control valve in the longitudinal direction is oriented towards the camshaft. The head cover is provided on an upper portion of the cylinder head.

Abstract: To provide a bearing member for a valve gear capable of reducing friction. A bearing member (34) for a valve gear (1) includes a cam shaft (20). The cam shaft (20) has: a cam (30) for opening/closing at least one of an intake valve and an exhaust valve; and a plurality of journal parts (36). The bearing member (34) includes: a cam cap (38) supporting the journal part (36) from above, surrounding it; a bearing base part (40) supporting the journal part (36) from below; and a stepped part (46a) provided on an inner peripheral surface of the cam cap (38) facing the journal part (36), overhanging on an inner peripheral side of the inner peripheral surface. An upstream-side end portion (46c) of the stepped part (46a) is positioned more on a downstream side than an upstream-side abutting surface (38a) of the cam cap (38), whereas a downstream-side end portion (46d) of the stepped part (46a) is positioned more on an upstream side than a downstream-side abutting surface (38b) of the cam cap (38).

Abstract: An oil passage structure of a dry sump engine includes an oil recovery passage, at least one first communicating hole, and a first oil suction passage. The oil recovery passage extends in a direction in which a cylinder bank extends and is disposed so that at least part of the oil recovery passage is located outward of an external lower end portion of a valve gear chamber of a cylinder head along a junction between a side wall portion of the cylinder head and a bottom surface of the valve gear chamber in a state where the dry sump engine is mounted on a vehicle in an inclined manner. The at least one first communicating hole is provided in the side wall portion so as to connect the valve gear chamber of the cylinder head and the oil recovery passage.

Abstract: An internal combustion engine may include at least one camshaft mounted via at least one bearing with at least one phase adjuster. The at least one bearing may be a rolling bearing. An oil feed ring may surround the camshaft adjacent to the rolling bearing, wherein the oil feed ring may have at least one external annular channel and at least one first radial bore aligned with a second radial bore in the camshaft. An outer diameter of the oil feed ring may be smaller than an outer diameter of the rolling bearing. An oil supply of the at least one phase adjuster may be introduced via an oil gallery defined in a cylinder head through the annular channel through the second radial bore into the camshaft.

Abstract: A cylinder head assembly includes a cylinder head defining a port for selectively communicating air to a combustion chamber of an engine or for selectively discharging exhaust gases from the combustion chamber. The cylinder head also defines a valve seat between the port and the combustion chamber. A combustion valve is mounted in the cylinder head and is selectively seated and unseated with the valve seat. A camshaft with a lobe is mounted in the cylinder head. A rocker arm is engaged with the combustion valve and has a follower for following the lobe. An oil spray source provides a spray of oil while an oil reflector is configured to receive the spray of oil and direct the spray of oil to the follower to provide lubrication between the interface of the follower and the lobe.

Abstract: In an auxiliary device mounting structure for mounting an auxiliary device (4) on a cylinder head (2), the auxiliary device such as a fuel injection pump is provided with a lower housing (42) attached to the cylinder head, and the upper housing (43) supporting the auxiliary device and attached to the lower housing so as to jointly form a housing chamber (48). An extension (51) of a camshaft (37) extends into the housing chamber, and is fitted with a cam (61) for actuating a plunger (86) of the auxiliary device. A radial bearing (53, 56) for the camshaft extension is integrally formed on the first housing at a position located more inward than the axial end of the cylinder head so that the cylinder head is not required to be formed with an axial extension, and is enabled to support the auxiliary device and a bearing for the camshaft extension in a highly stable manner.

Abstract: In a valve drive for an internal combustion engine, with a rocker arm (40) being arranged in its cylinder head pivotal by the cams of a camshaft and supported with one end at the valve shaft of a charge-cycle valve, while comprising at its other end a ball scraper (46), resting on the spherical end section (44) of a support element (42) embodied as a hydraulic valve clearance compensation element, a groove-shaped ventilation channel (57) is arranged according to the invention in the contact area between the ball scraper (46) of the rocker arm (40) and the spherical end section (44) of the support element (42) by which the oil reservoir (54) of the support element (42) is open towards the outside.

Abstract: The present invention may be used for vehicle engines having bores in which roller valve lifters reciprocate. A roller valve lifter may have a body with two opposed subtending spaced apart legs. A cam follower roller bearing having a press fit inner sleeve bushing may be rotatably mounted on the pin. Each of the legs may have an oil feed hole that traverses from an exterior surface to an interior surface adjacent to the inner sleeve bushing. The body in an upper portion may have a key device or an attached vertical guide bar to maintain proper orientation of the roller valve lifter to a cam lobe.

Abstract: A method of lubricating one or more valve train (100) components includes delivering a lubricating fluid to the inner cavity (156) of a fluid collecting member (152) through a radially extending discharge portion (182) of a fluid passage (176) in a rocker arm insert. The insert fluid passage (176) is in fluid communication with a lubricating fluid source to dispense a controlled amount of lubricating fluid to one or more valve train components during operation of an engine. The radially extending discharge portion of the fluid passage in the insert may be positioned adjacent to a spherical end cap that is received in the inner cavity of the fluid collecting member.

Abstract: A variable cam timing phaser (10) can a drive stator (14) and at least one driven rotor (20, 20a, 20b) mounted for rotation about a common axis. At least one vane-type hydraulic coupling can define at least one expandable fluid chamber (40, 50, 40a, 50a, 40b, 50b) for coupling the at least one driven rotor (20, 20a, 20b) for rotation with the drive stator (14) to enable the phase of the at least one driven rotor (20, 20a, 20b) to be adjusted independently of one another and independently relative to the drive stator (14). A control valve (60) can have at least one inlet port (62), at least one outlet port (64, 64a), and at least one common shared fluid passage (16, 16a, 16b, 16c, 16d).

Abstract: There is disclosed a method for cylinder lubrication of large diesel engines, such as marine engines. Injection of lubricating oil is performed via a number of injection units that correspond to a multiple of the cylinder number in the engine. There is desired an efficient distribution of the lubricating oil, not only across the periphery of the cylinder, but also across the travel of the piston in the cylinder in order thereby to reduce the consumption of lubricating oil. This is achieved in that lubricating oil is supplied by a combination of injection of a first part of the lubricating oil directly on a ring area of the cylinder wall before the passage of the piston and an injection of a second part of the lubricating oil directly onto the piston during its passage.

Abstract: An engine includes a camshaft supported in a housing for rotation about an axis of rotation. A cam gear is attached to one end of the camshaft and includes a first thrust bearing surface. A thrust ring is attached to the cam gear and includes a second thrust bearing surface. A thrust ring retainer is attached to the housing with a plurality of bolts and includes a pair of thrust surfaces trapped between the first thrust bearing surface of the cam gear and a second thrust bearing surface of the thrust ring. The thrust ring retainer also defines a portion of a lubrication connection passage that facilitates pressure equalization among a plurality of lubrication galleries arranged in parallel adjacent the camshaft.

Abstract: A bearing arrangement may include at least one sliding bearing having a polymer coating. The bearing arrangement may bear a camshaft, and at least one of the polymer coating is applied to the camshaft, and the polymer coating is arranged in a bearing ring. An oil trough for collecting oil may be provided on at least one of the bearing ring and a cylinder head which receives the bearing ring.

Abstract: A three-port flow control valve comprising a valve body having two opposite-facing valve seats disposed along a central bore terminating in an exhaust port. A supply port communicates with the first valve seat, and a common port communicates with the second valve seat. A pintle shaft connected to an actuating linear solenoid extends along the central bore. A first valve head actuated by the pintle shaft mates with the first valve seat. A second valve head disposed colinearly with the pintle shaft mates with the second valve seat. Opening of the first valve closes the second valve and vice versa. While the solenoid is de-energized the supply pressure keeps the first valve closed. A spring may be disposed between the second valve head and the exhaust port to urge the second valve head to close with the second valve seat.

Abstract: A lubrication system for a portable four-stroke engine includes an opening end of the breather passage is disposed at substantially a center of a valve-operating chamber, and the valve-operating chamber is formed by attaching a valve-operating chamber cover. An inner cover is attached to an inner surface of the valve-operating chamber cover so as to be provided along and in contact with the inner surface of the valve-operating chamber cover. A suction passage is formed as a gap between the circumferential edge of the top plate portion and the inner cover. Three or more suction tubes that are in communication with the suction passage are provided in the inner cover, each of the suction tubes having an opening end. At least one of the opening ends of the suction tubes is provided lower than the opening end of the breather passage in an attitude of the engine during use.

Abstract: An engine assembly includes an engine block, a cylinder head coupled to the engine block and first and second lubrication systems. The first lubrication system includes a first pump in communication with the engine block and providing a first fluid to the engine block. The second lubrication system is isolated from the first lubrication system and includes a second pump in communication with the cylinder head and providing a second fluid to the cylinder head.

Abstract: An engine assembly may include a cylinder head and a fluid control assembly. The cylinder head may include first and second walls opposite one another and extending from a base region defining a cavity. The cylinder head may define a first oil passage extending through an interior surface defining the cavity. The fluid control assembly may include a first oil control valve and a first conduit. The first oil control valve may be fixed to the base region and may define a first port in fluid communication with the first oil passage and a second port in fluid communication with a second oil passage in the cylinder head. The first conduit may extend from the first oil control valve toward the first wall and may provide the fluid communication between the first port of the oil control valve and the first oil passage in the cylinder head.

Abstract: An oil control valve is disposed in fluid communication between an oil supply gallery and an oil control gallery of an oil control system. The oil control valve has a first position that prevents flow of oil from the oil supply gallery to the oil control gallery and permits flow of oil from the oil control gallery to a downstream drain line, and a second position that permits flow of oil from the oil supply gallery to the oil control gallery and prevents flow of oil from the oil supply gallery to the drain line. An oil bypass passage is disposed in fluid communication between the oil supply gallery and the oil control gallery, and is disposed to bypass the oil control valve. The oil bypass passage has first and second oil flow constriction regions, and an intermediate volume disposed between the first and second oil flow constriction regions.

Abstract: A vehicle engine includes: a cylinder head; a cam housing fixed to a top of the cylinder head; a cam cap fixed to a top of the cam housing; a camshaft rotatably supported between the cam housing and the cam cap, the camshaft supporting a cam; a rocker arm configured to be pushed by the cam; and a valve configured to operate by being pushed by the rocker arm; and an oil pipe that is formed integrally with the cam cap. Lubricant oil is supplied through the oil pipe to a contact point between the cam and the rocker arm.

Abstract: An oil pan for an internal combustion engine has a pan body and a partition disposed in the pan body so as to separate an interior of the pan body into two separate oil chambers. The partition is provided with at least two overflow openings. An adjustable closure element is common to the at least two overflow openings for opening or closing the at least two overflow openings.

Abstract: There is described a hydraulic lubricating apparatus (252) for dosing cylinder lubricating oil, including a housing which via one or more valves (220) is connected to a source for supplying hydraulic oil (262) and cylinder lubricating oil (not shown), a number of hydraulic cylinders each having a hydraulic piston (6) and which may be pressurized by hydraulic oil. Furthermore, there are a number of injection units (251) corresponding to a multiple of the cylinder (250) number in the engine, and which are connected with each their dosing cylinder by a dosing piston (21). Also, there is provided a distributor plate (7) which at one side is in contact with the dosing pistons (21) and which at its other side is in contact with the hydraulic pistons (6) for displacing the distributor plate for actuating the dosing pistons.

Abstract: A vehicle engine includes a cylinder head, a cam housing fixed to a top of the cylinder head, a cam cap fixed to a top of the cam housing, a camshaft rotatably supported between the cam housing and the cam cap, the camshaft supporting a cam, a rocker arm configured to be pushed by the cam, and a valve configured to operate by being pushed by the rocker arm. The vehicle engine has an oil pipe that is formed integrally with the cam housing.

Abstract: A combustion engine is provided that includes at least one oil distribution mechanism for distributing lubrication oil to the engine.

Abstract: A cylinder head for an internal combustion engine includes a casting having a number of camshaft support bulkheads. Each of the support bulkheads has a portion of a parent bore bearing for mounting a camshaft. A bulkhead thrust surface is formed in an outer surface of at least one of the support bulkheads. A camshaft is rotatably mounted upon the support bulkheads. The camshaft has at least one thrust bearing member abutting a bulkhead thrust surface which is provided with lubricating oil by means of a radially extending, surface-piercing lubricant distribution channel formed in the bulkhead thrust surface, such that oil flowing in the parent bearing will be caused to be deposited upon the bulkhead thrust surface as well as upon the camshaft thrust surface.

Abstract: An air-cooled general-purpose engine includes: a cooling fan fixed to one end portion, protruding outward from one end wall of an engine main body, of a crankshaft; and a shroud which is mounted to the engine main body, and which defines a cooling-air path between the shroud and the one end wall, the cooling-air path guiding a cooling air blown under pressure from the cooling fan. The air-cooled general-purpose engine includes: an oil pump which pumps up an oil from an oil reservoir; and an oil-supply path which is formed in the one end wall, facing the cooling-air path, of the engine main body, and configured to guide the oil discharged from the oil pump to a valve operating chamber in a head portion of the engine main body, and a jet for jetting the oil is provided in an opening of the oil-supply path, the opening being open to the valve operating chamber.

Abstract: The present invention may be used for vehicle engines having bores in which roller valve lifters reciprocate. A roller valve lifter may have a body with two opposed subtending spaced apart legs. A cam follower roller bearing having a press fit inner sleeve bushing may be rotatably mounted on the pin. Each of the legs may have an oil feed hole that traverses from an exterior surface to an interior surface adjacent to the inner sleeve bushing. The body in an upper portion may have a key device or an attached vertical guide bar to maintain proper orientation of the roller valve lifter to a cam lobe.

Abstract: There are provided first and second extending oil passages supplying operational oil to intake-side and exhaust-side lash adjustors, a first connection oil passage interconnecting one end portions of the oil passages, and an oil-pressure control valve selecting a first state in which the first extending oil passage does not connect to a drain oil passage or a second state in which the first extending oil passage connects to the drain oil passage. An orifice is provided in an oil passage which is located on the side of the first connection oil passage relative to a supply portion of the operational oil supplied to the lash adjustor and located on the side of the first connection oil passage relative to another supply portion of the operational oil supplied to the lash adjustor.

Abstract: A rocker arm for a tappet pushrod valve train, which has a contact surface for a gas exchange valve on an underside at one end and a first bore in which a hydraulic lash adjusting element is arranged at another end. A second bore extends transverse through the rocker arm, between the ends. From the second bore, a passage leads to the first bore. A venting passage extends from a bottom of the bore at the another end and has an outlet aligned with the primary passage. A secondary passage branches from the venting passage and has an opening that extends to an upper side of the rocker arm and is situated in a longitudinal channel. The channel extends along the upper side and into a region on the one end. From the region, the hydraulic medium can be routed through an end passage to the contact surface.

Abstract: A cylinder head including a dam defining a reservoir surrounding the periphery of the fuel pump tappet/roller follower mounting hole is provided. The cylinder head includes a tappet/roller follower mounted in the tappet/roller follower mounting hole and in communication with a cam and a fuel pump. The fuel pump is located on the high side of the head and oil drainage occurs in a direction away from the mounting hole. The dam and reservoir are configured to retain lubricant in the mounting hole and the sliding interface between the mounting hole and the tappet/roller follower. The dam and reservoir are configured to retain a minimum level of oil in the mounting hole when the head is in vehicle position. A method is provided for retaining lubrication in the tappet/roller follower hole by forming a dam defining a reservoir in the head and passively providing lubricant to the tappet/roller follower hole.

Abstract: An apparatus for preventing oil from draining in an engine oil supply system, which supplies the oil from a main gallery in an engine to diverge into a first oil pipe communicating with an intake side hydraulic lash adjuster and into a second oil pipe communicating with an exhaust side hydraulic lash adjuster, may include an adaptor installed between the first oil pipe and a main oil passage connected to the main gallery, wherein the adaptor is disposed higher than the first oil pipe so as to prevent the oil from draining back, and wherein the second oil pipe is communicated with the mail oil passage through a connection pipe.

Abstract: In a valve drive for an internal combustion engine, with a rocker arm (40) being arranged in its cylinder head pivotal by the cams of a camshaft and supported with one end at the valve shaft of a charge-cycle valve, while comprising at its other end a ball scraper (46), resting on the spherical end section (44) of a support element (42) embodied as a hydraulic valve clearance compensation element, a groove-shaped ventilation channel (57) is arranged according to the invention in the contact area between the ball scraper (46) of the rocker arm (40) and the spherical end section (44) of the support element (42) by which the oil reservoir (54) of the support element (42) is open towards the outside.

Abstract: A cam bearing cap may include a first bearing cap region, a pump mounting region, an oil inlet, and an oil outlet. The first bearing cap region may extend over and secure a first camshaft to an engine assembly. The pump mounting region may extend from the first bearing cap region and may have a secondary oil pump mounted thereto. The oil inlet may extend through the pump mounting region and may provide communication between the secondary oil pump and an oil supply. The oil outlet may extend through the pump mounting region and may provide communication between the secondary oil pump and a hydraulically actuated engine component.

Abstract: An internal combustion engine comprises at least two intake valves per cylinder, each of them provided with respective spring return means which push the valve towards a closed position. The intake valves of each cylinder are controlled by a single cam of an engine camshaft, through a single tappet actuated by said cam and through a hydraulic system. The hydraulic system comprises a master cylinder having a piston positively connected to said tappet and two hydraulic actuators respectively associated to the two intake valves and which are both hydraulically connected to a common pressure chamber of said master cylinder. The return spring means associated to the intake valves of one and the same engine cylinder have predetermined loadS and/or rigidities which are different from each other, in such a way that said intake valves have different lift profiles, so as to cause a swirl motion of the air fed into the engine cylinder, which allows to improve the air-fuel mixing.

Abstract: A lubrication system for a fuel pump of an engine, may include at least one oil supply hole formed radially in a journal of a camshaft, an oil channel formed in a cam cap rotatably connected to the journal of the camshaft and selectively communicating with the at least one oil supply hole, a nozzle formed in the cam cap and being in fluid connection with the oil channel to inject oil to a contact portion between a pump-driving cam of the camshaft and an operational member of the fuel pump driven by the pump-driving cam, and a fluid communication control member selectively connecting the oil channel and the at least one oil supply hole in accordance with rotation of the camshaft.

Abstract: An engine assembly may include a cylinder head defining a first bearing surface supporting a camshaft, a bearing cap fixed to the cylinder head and a lubrication rail. The first bearing surface may have a first oil inlet extending therethrough. The camshaft may define an axial bore, a first radial passage and a second radial passage. The first radial passage may extend from the axial bore through an outer circumference of the camshaft and may be in communication with the first oil inlet. The second radial passage may extend from the axial bore through an outer circumference of the camshaft. The bearing cap may be fixed to the cylinder head and include a first oil outlet in communication with the second radial passage. The lubrication rail may include a second oil inlet in communication with the first oil outlet and a first lubrication supply passage aligned with a camshaft lobe.

Abstract: A fuel pump lubrication apparatus for lubricating a fuel pump including a tappet and the fuel pump operating the tappet, may have a cylinder head including an oil gallery wherein a camshaft is disposed, an oil supply line communicated to the oil gallery, a lubrication cam cap slidably encompassing the camshaft, and a cam cap oil hole formed in the lubrication cam cap and ejecting oil received from the oil supply line to a contacting portion between the pump cam and a plunger of the fuel pump.

Abstract: A four-cycle engine with an enclosed oil reservoir for mounting on a power tool is provided. An oil pump driven by a camshaft, which mates by a cam gear with crank gear that is driven by a crank shaft, inhales the oil from the oil reservoir to lubricate the engine parts. A circular arc wall surrounds around web of the crankshaft with a slight distance from the web. A scroll-shaped wall has gradually increased distance from the circular arc wall to the direction of rotation of the web and has partial overlap with the circular arc wall. In case of stock of engine oriented power take off side up or down, oil is prevented to flow from oil reservoir to combustion chamber by a weir which is provided between the circular wall and the scrolled wall. The check valve splashes breathing missed oil from the crankshaft to the breather room and causes the oil to supply lubricant to lubricate the engine parts.

Abstract: A sealing and lubrication system includes first and second machine components with a combination sealing and lubrication directing gasket mounted between the first and second machine components. The gasket includes a sealing portion extending between the components and a nozzle portion which is operatively connected with the sealing portion as well as with a lubrication supply passage. The nozzle portion extends from the sealing portion of the gasket to a region external to the first machine component and the second machine component. The nozzle provides lubricating oil to at least one moving part of a third machine component.

Abstract: A cam carrier assembly may include at least a cam carrier mounted on a cylinder head and including a support, an actuator shaft, a portion of which is mounted in the support and rotatable to control a valve life, and a cap mounted on the cylinder head and coupled to the at least a cam carrier to rotatably support the portion of the actuator shaft and surrounding and rotatably supporting the other portion of the actuator shaft, which is not surrounded by the support.

Abstract: An oil communication passage (39b) is formed so as to run through a wall portion (39) separating an oil collector (41) and an oil drop hole (38) formed in an engine cylinder head (14), and oil that has collected in the oil collector (41) can therefore be guided to the oil drop hole (38) via the oil communication passage (39b). An oil supply passage (39c) and a retaining hole (39a) for retaining a hydraulic tappet (22), which is operated by oil supplied from the oil supply passage (39c), are formed in the wall portion (39) of the cylinder head (14), and the oil supply passage (39c) and the oil communication passage (39b) communicate with each other via the retaining hole (39a); therefore, even if part of the oil supplied from the oil supply passage (39c) to the hydraulic tappet (22) leaks into the retaining hole (39a), the oil can be discharged by utilizing the oil communication passage (39b).

Abstract: An oil circuit for a continuously variable valve timing apparatus, may include a main line that is formed in a cylinder block to receive oil from a hydraulic pump, a first oil line that connects an intake oil control valve that is mounted on a cylinder head that is assembled to the cylinder block with the main line, a second oil line that connects an exhaust oil control valve that is mounted in a cylinder head cover with the first oil line, a third oil line that connects a cam journal that is formed in the cylinder head with the first oil line, and a fourth oil line that connects a timing chain tensioner that is mounted in the cylinder block with the third oil line.

Abstract: A camshaft cover mounts to a cylinder head and defines cavities for oil control valves that adjust the position of camshafts via camshaft phaser assemblies. The cavities are positioned above the camshafts when the camshaft cover is mounted to the cylinder head. A feed passage communicates pressurized fluid from the cylinder head to the cavities when the camshaft cover is mounted to the cylinder head. Control passages communicate fluid from the cavities to the camshaft phaser assemblies when the camshaft cover is mounted to the cylinder head.

Abstract: A method of forming a cylinder head may include machining an upper surface of a cam tower of the cylinder head to form a generally planar surface. An oil passage may be drilled in the upper surface to provide an oil feed. A bearing bore may be formed in the upper surface of the cam tower. The bearing bore may include a recess having first and second circumferential ends. The oil passage may intersect the first circumferential end.