Abstract: A valve timing system for an internal combustion engine having a roller finger follower assembly including a lash adjustment mechanism. The roller finger follower assembly includes a base arm and a roller carriage that may be assembled to each other in a range of positions. The roller carriage supports a camshaft contact roller that may be moved by an adjustment mechanism to cause the camshaft contact roller to be contacted by the lobe of a camshaft in a range of angular relationships. The roller finger follower assembly includes a lash pin having a central section that is contoured to provide a secondary lash adjustment.

Abstract: A variable valve actuating mechanism includes an output cam pivotally disposed upon an input shaft. A first link arm is pivotally coupled at a first end thereof to the output cam. A rocker arm is pivotally coupled at a first end thereof to a second end of the link arm. A frame member is pivotally disposed upon the input shaft. Lash adjusting means include an eccentric pin and a force applying means. The eccentric pin pivotally couples together a first end of the frame member and a second end of the rocker arm. The force applying means applies a force upon the eccentric pin causing the eccentric pin to pivot which, in turn, adjusts the position of the rocker arm relative to the input shaft and thereby removes lash from the mechanism.

Abstract: A sheet metal rocker arm manufactured by the steps of punching one metal plate to form a blank having a predetermined contour and through holes, and subjecting this blank to a bending work based on a press work to form a pair of side walls parallel to each other and a connecting portion for connecting the both ends of the side walls in the width direction thereof. This rocker arm is also provided with at least a pair of though holes formed at positions which are aligned with each other on the both side walls and at least one engagement portion provided in a part of the connecting portion. The thickness of at least one engagement portion, is formed to be greater than the thickness of the both side walls.

Abstract: A two-step roller finger follower includes an elongate body having a first side member and a second side member. A first end and a second end interconnect the first and second side members. The first and second side member define first and second pin orifices, respectively. A center roller is disposed between the first and second side members. The center roller defines a shaft orifice therethrough. A shaft extends through the shaft orifice. A first shaft end is disposed proximate the first side member, and the second shaft end is disposed proximate the second side member. The second shaft end defines a shaft bore therein. The first shaft end defines a pin chamber therein. The shaft bore being is substantially concentric with and intersects the pin chamber. A locking pin assembly is disposed partially within the shaft bore, the pin chamber and at least one of the pin orifices.

Abstract: A cam follower having a clamp disposed on at least one end thereof. The follower includes two opposing sidewalls interconnected by a lower pallet. A roller is rotatably mounted to and disposed between the sidewalls via needled or journal bearings or other rotatable connection known in the art. A clamp is disposed about an end of the follower to induce compression force in the pallet and possibly act as the valve guide walls. The clamp increases the stiffness of the follower and induces compressive stress in the pallet area thereby increasing fatigue life. The clamp could also increase the length of the valve guide walls for better stability during engine assembly.

Abstract: A cam actuated continuous simultaneously variable valve timing and lifting assembly for selectively operating the valve of an internal combustion engine. The valve is actuated by a cam on a camshaft driven by a crankshaft. The cam is in operative engagement with a slider. The slider is selectively movable by a slider actuator within a rocker arm. The slider actuator is selectively extended and retracted by a first motor drive unit. A computer controller operatively controls the motor drive unit to selectively and simultaneously vary the timing and lifting of the valve. A modification of the invention is provided with a second motor drive unit provided with a downwardly extending hexagonal transfer shaft drive assembly having a downwardly extending spherical ball which operatively engages a rocker arm assembly provided with a slider thereon to accommodate the movement of the slider as needed.

Abstract: A lever-type cam follower (1) of a thin-walled material like sheet metal is proposed. It has a simply structured valve stem guidance in the region of one of its ends (5). The guidance comprises a separate securing element (6) with a basically U-shaped cross-section. A web (9) of the securing element (6) bears against a crossbeam (3) of the cam follower (1) and possesses an opening (11), for example punched, for receiving a valve stem.

Abstract: In a valve operating system in an internal combustion engine, a swinging support section provided at a base end of a rocker arm is swingably carried on a rocker shaft mounted in a cylinder head. A plurality of valve abutments are provided at a tip end of the rocker arm and capable of being individually put into abutment against upper ends of a plurality of engine valves, and a cam abutment is provided on the rocker arm in an intermediate portion between the swinging support section and each of the valve abutments to come into contact with a valve operating cam. The swinging support section comprises a thinner cylindrical portion surrounding the rocker shaft, and thicker cylindrical portions which are formed at a thickness larger than that of the thinner cylindrical portion into a cylindrical shape to surround the rocker shaft and which are integrally and continuously provided at axially opposite ends of the thinner cylindrical portion, respectively.

Abstract: The present invention provides a mechanism of retaining a rocker lever ball socket on a rocker lever ball. The mechanism provided is a retaining cap which is adapted to fit over and securely engage to the socket through a tab and groove arrangement and is made of a slightly elastic material and includes a restricted opening sized smaller than the fullest diameter of the rocker lever ball. During assembly, the retaining cap first interlocks with the socket by a tab and groove arrangement, and the lever ball is then pushed through the restricted opening. The restricted opening, being slightly elastic, enlarges to allow passage of the ball and retracts to a size smaller than the ball so that it is retained thereon.

Abstract: A variable valve timing and lift assembly for operating a valve of an internal combustion engine. The valve is actuated by a cam on a camshaft driven by a crankshaft. The cam is in operative engagement with a slider. The slider is selectively movable by a slider actuator within a rocker arm slider opening of a rocker arm. The slider actuator is selectively extended and retracted by a motor drive unit. A computer controller operatively controls the motor drive unit to vary the timing and lift of the valve.

Abstract: A rocker arm assembly includes a rocker arm body having opposing side walls which are connected by a bottom wall having separate first and second portions. The first portion is configured to engage a push rod and the second portion is configured to engage a valve stem. The side walls and the first and second portions of the bottom wall cooperate to form an aperture having first and second edges. A bridge is configured for snap-fit cooperation with the first and second edges, respectively. The bridge includes upstanding lips which cooperate with the opposing side walls to form first and second oil-transporting channels for transporting oil from the first portion of the bottom wall to the second portion for lubricating the rocker arm body at the point of engagement with the valve stem as the rocker arm body rocks back and forth.

Abstract: In a valve operating system in an internal combustion engine, a rocker arm has a plurality of valve abutments provided thereon and capable of being individually put into abutment against upper ends of a plurality of engine valves cam abutments, and also has cam abutments provided thereon to come into contact with a valve operating cam. Wall-removed portions are formed in the rocker arm at locations corresponding to the cam abutments and open at opposite sides of the rocker arm. Thus, it is possible to provide a reduction in weight of the rocker arm.

Abstract: Internal combustion engine valve roller rocker arm system designed to manipulate horsepower output of an equipped engine. Each roller rocker arm system is formed of two arm members pivotally mounted to a common shaft and are joined together by a pin through roller bearings. As a conventional camshaft rotates, it contacts the roller bearing causing a conventional valve to attain an open valve position through the arm assemblies.

Abstract: One of adjacent rocker arms in a valve operating system of an engine is provided with first and second support walls. A roller is disposed between the first and second support walls to come into rolling contact with cams. A cylindrical roller shaft, supporting the roller, is provided between the first and second support walls, so that a switchover pin of an associative-operation switchover means can be slidably fitted into the roller shaft in response to the movement thereof. The roller shaft is press-fitted into at least a second one of the first and second support walls, and a press-fit margin for the roller shaft press-fitted into the second support wall on the side of the other rocker arm is set smaller than a press-fit margin for the roller shaft press-fitted into the second support wall on the side of the roller.

Abstract: A sheet metal rocker arm manufactured by the steps of punching one metal plate to form a blank having a predetermined contour and through holes, and subjecting this blank to a bending work based on a press work to form a pair of side walls parallel to each other and a connecting portion for connecting the both ends of the side walls in the width direction thereof. This rocker arm is also provided with at least a pair of though holes formed at positions which are aligned with each other on the both side walls and at least one engagement portion provided in a part of the connecting portion. The thickness of at least one engagement portion, is formed to be greater than the thickness of the both side walls.

Abstract: The lost motion arm 44 has first and second contact surfaces 102 and 104. A latch mechanism is connected on the body with an extendable plunger 120 having a first contact surface 124 and a second contact surface 126. The plunger 120 has a first position for first contact surface 124 engagement with the lost motion arm first contact surface 102 to prevent angular movement of the lost motion arm 44 with respect to the body 10 in a first angular direction. When angular movement in the first angular direction is prevented, the motion of the lost motion arm 44 imparted by the cam lobe 66 is transmitted to the body 10 to provide for a first state of operation of the valve stem 18. When the plunger 120 is in a second position, non-contacting with the lost motion arm 44, the lost motion arm 44 is allowed to pivot relative to the body 10. Accordingly, the rocker arm assembly 7 will be in a second state of total or partial deactivation of the valve stem 18.

Abstract: A rocker arm, for operating a valve in a machine such as an internal combustion engine, has a stamped body with a push rod socket at a first end, a valve pallet at a second end, and two lateral walls extending between the first and second ends, each of the lateral walls having a bearing support aligned on a common axis. A stiffener strap extends from one bearing support over the lateral walls to the other bearing support, the stiffener strap having a bearing housing at each end for engagement with the bearing supports of the stamped body. The stiffener strap may also include stabilizer features for clamping the lateral walls of the stamped body to resist inward buckling in service.

Abstract: An rocker arm is tilted by a cam so as to open and close a valve provided on a cylinder head. This arm comprises a pair of opposing wall portions which are made by folding a flat plate so that they oppose substantially in parallel and cylindrical expanding portions which are formed at tilting fulcrum shaft mounting portions located in a center of the opposing wall portions in the length direction thereof, the expanding portions being expanded in the direction of the tilting fulcrum shaft. The cylindrical expanding portions which are thicker than the opposing wall portions receive a load accompanied by the tilting motion so as to decrease bearing stress applied to the opposing wall portions.

Abstract: A finger lever for a valve train of an internal combustion engine, said finger lever being made by shaping without chip removal and comprising two side walls (5,6) which are connected to each other in a first end region (1) by a first bottom wall (4) to form an upwardly open U-shape, the first bottom wall (4) comprising a downwardly facing semi-spherical recess (7) for receiving a support element, said side walls (5,6) being connected to each other in a second end region (2) by a second bottom wall (11) to form an upwardly open U-shape, said second bottom wall (11) comprising a contact surface for a valve stem of a gas exchange valve (12), and the contact surface comprising lateral guides spaced apart from each other characterized in that, in the region of the contact surface of the valve stem (12) and/or in the region of the semi-spherical recess (7), the side walls (5,6) comprise partially punched-out sections (14) that are bent through nearly 180° toward the valve stem (12) and/or toward the support el

Abstract: The present invention pertains to a valve actuating lever having a non-cut formed oblong base body which is configured essentially symmetrical to a longitudinal symmetry plane extending essentially longitudinally therefrom, a valve contact area arranged on a first end of said base body, two tabs arranged on both sides of said longitudinal symmetry plane in said valve contact area, each respectively having a lateral surface aligned facing said longitudinal symmetry plane, whereby said tabs are formed on said base body and bent over toward said valve contact area. Said tabs are arranged spaced at a clearance distance at an end edge of said oblong base body, said clearance distance being less than the clearance of said lateral surfaces in the valve contact area.

Abstract: A cam follower (1) is proposed, which is made from a sheet metal material, and has a profile that is U-shaped in cross-section. In the area of its one end (6), its side walls (2) taper conically. At the same time, straps (7) for guiding a shaft end of a gas exchange valve are provided on an underside (5) of the cam follower (1) as an extension of the side walls (2) and are bent by 180° to fit on the underside (5) in the area of the end (6). A cam follower (1) of this type is made in a simple way, has an excellent guide possibility for the shaft end of the gas exchange valve, and has a smaller mass with a smaller mass moment of inertia than cam followers that have been used until now.

Abstract: A finger lever that is shaped without cutting having two side walls (5, 6), which are connected in a first end area (1) by a lower wall (4) in a U-shape which opens upwardly, is provided with a bearing surface for a gas exchange valve (11) that is formed by the side walls (5, 6) being adjacent to each other axially in the second end area (2) so that a separation plane (13) is formed in a longitudinal center plane (12) of the finger lever.

Abstract: A rotary-to-linear converter for use with a valve actuation device having a linear reciprocating cam shaft having longitudinally extending cam grooves that are engaged by captive cam followers which oscillate up and down in response to sideways reciprocation of the camshaft for actuating intake or exhaust valves of internal combustion engines or other devices employing reciprocating pistons and valves. The camshaft is caused to reciprocate by a rotary linear converter of the “yankee” type composed of double helix channel at the extreme end of the camshaft and a rotary drive collar having two sets of diametrically opposed guide members. The guide members comprise dogs which are rotatably engaged with the drive collar and slidably engaged with the double helix channel of the cam shaft.

Abstract: A rocker arm (10) that reduces frictional forces between a cam (86) and the rocker arm (10) is disclosed. The rocker arm (10) includes a pair of spaced side members (20) having a valve portion (14), a middle portion (16), and a pivot portion (12). The side members (20) of rocker arm (10) each define a downwardly extending tappet hole (49) located generally centrally within the valve portion (14). The middle portion (16) of each side member (20) defines a bearing hole (68), and each of the pivot portions (12) defines a pivot hole (66). A web (70) extends between side members (20) at a valve portion (14) and at the pivot portion (12), defining a recess (85) therebetween at about the middle portion (16). A pin bearing is located within the bearing holes (68) and passes through the recess (85). An annular striking member (80) is located within the recess (85) and rotatably engages the pin bearing (69). During operation, a cam (86) is placed in operative contact with striking member (80).

Abstract: A rocker arm assembly for an internal combustion engine includes a central mounting shaft and a rocker arm rotatably mounted to the central shaft wherein the rocker arm has a generally planar main body with a valve contacting end and a push rod contacting end. A convex surface is formed on a lower edge of a valve contacting surface and the push rod contacting end includes a generally semi-spherical recess that creates generally semi-spherical outer projections on the sides of the rocker arm main body. The central mounting shaft according to one embodiment of the present invention is a generally hollow, tubular shaft having spaced apart lubrication apertures for providing lubricant to each rocker arm. A second embodiment of the present invention has a central mounting shaft that includes a plurality of relatively short, hardened shafts connected together at respective adjoining ends by a spacer sleeve to provide a rocker arm assembly having greater stiffness.

Abstract: The invention relates to a rocker arm (1) of a valve train of an internal combustion engine. This rocker arm (1) comprises two longitudinally extending side walls (2, 3) which enclose an intermediate space (16) while being connected to each other by a crossbeam (4) to form a U-shaped cross-section. According to the invention, a separate channel (24) for the transport of lubricant is created on a top surface (22) of the crossbeam (4). This channel (24) starts from an abutment (9) for an end of a push rod on the undersurface (8) of the crossbeam (4) and leads to a support (12) for an end of a gas exchange valve in the region of a second end (11) of the crossbeam (4).

Abstract: A sheet metal rocker arm manufactured by the steps of punching one metal plate to form a blank having a predetermined contour and through holes, and subjecting this blank to a bending work based on a press work to form a pair of side walls parallel to each other and a connecting portion for connecting the both ends of the side walls in the width direction thereof. This rocker arm is also provided with at least a pair of through holes formed at positions which are aligned with each other on the both side walls and at least one engagement portion provided in a part of the connecting portion. The thickness of at least one engagement portion, is formed to be greater than the thickness of the both side walls.

Abstract: An operating lever for a valve train of an internal combustion engine comprises, on the valve-proximate end, a sliding shoe arranged between itself and an end of a valve stem of a gas exchange valve.The operating lever is characterized in that it is configured as a chiplessly shaped sheet metal part and comprises in the valve-proximate region (2), a bottom wall (12) which is connected in an upwardly open U-shape to two side walls (5, 6), the bottom wall (12) comprises a downwardly open recess (13) for receiving the sliding shoe (14) which is inseparably retained in the recess (13), and spatial dimensions of the sliding shoe (14) and the recess (13) are matched to each other so that the sliding shoe (14) can freely execute a pivoting movement in the recess (13) caused by a displacement of the valve stem (11).

Abstract: A tappet socket assembly for a rocker lever assembly or other lever assembly includes a retainer, a tappet socket, and a ball bearing. The rocker lever is adapted to be rocked about a pivot axis and includes a cylindrical opening or bore which partially receives the ball bearing. The retainer includes a cage provided by a plurality of legs and a cylindrical side wall insert. The side wall is secured within the cylindrical bore and press fitted therein by the ball bearing. The ball bearing exerts radially outward force on the retainer to secure the ball bearing and retainer to the rocker lever. The tappet socket includes a spherical concave recess that closely receives the ball bearing to provide a ball and socket joint and a flat engaging face for transferring the force of the rocker lever to a valve crosshead. The tappet socket is retained in the cage between the legs.

Abstract: A cam follower is provided having a thin-walled ring fixed in the bore of the shaft to extend across a parting plane between the shaft and the support. The ring includes a radially inwardly directed collar having a bore or an internal thread which is mated to a corresponding thread of a threaded fastener. Due to the fact that the collar or the internal thread is arranged in the region of an edge of the securing ring remote from the cylinder head, the threaded fastener has an adequate axial mobility in the pre-assembled state. This freedom of movement enables excellent handling during final assembly.

Abstract: A windshield wiper drive mechanism comprises a casing housing a motor and a reciprocating mechanism for converting the rotary motion of the motor to a reciprocating motion of an output shaft. Damping mechanism are provided for damping the rotation of the shaft comprising a cam and a resilient element for applying a radial damping force to the shaft at least towards the limits of its reciprocal movement. The resilient element can act directly on the cam or alternatively it may be part of the cam itself.

Abstract: A valve actuator for an engine includes a pivot socket having a dome with an improved lubrication passage. The actuator may be a finger follower with a body having spaced side walls connected adjacent opposite ends by first and second transverse webs. A cam follower, preferably a roller, having a cam engaging surface is supported on the side walls between the opposite ends of the body. The first web is engagable with a valve while the second web has a pivot socket with a dome having a generally spherical lower recess for engaging a pivot and a domed upper surface adjacent to the follower cam engaging surface. A lubrication passage extends through the dome from the lower recess to the upper surface. The passage includes an inverted inner channel formed in the recess and having upwardly converging sides meeting at a peak, and a connecting outer channel formed in the domed upper surface and having downwardly converging sides meeting at a valley.

Abstract: A rocker arm or finger lever (1) formed without machining (by a non-cutting shaping process) which has a U-shaped profile in cross section over almost its entire length which is open toward the top or the bottom, whereby the rocker arm or finger lever (1), in its end region in which it contacts a valve shaft end, is constructed double-walled. This rocker arm or finger lever (1) is distinguished in that the double-walled section or at least a strap (13) projecting over the longitudinal extension of the rocker arm or finger lever (1) is formed on an upper wall (10) which is bent under and lies between its two side walls (11, 12). A lever configured in this manner can be manufactured economically and has a good rigidity despite the reduced material used.

Abstract: A finger lever (1) is configured for the simultaneous loading of three identically operating gas exchange valves. To simplify the manufacture of a hydraulic medium supply of its hydraulic clearance compensation elements (4) resting on valve stem ends and to prevent unnecessary losses of hydraulic medium, the invention proposes the arrangement of only one central passage (12) in the finger lever (1) for supplying all the clearance compensation elements (4). This passage (12) extends near a central transverse plane of the finger lever (1) and opens into a cross-passage (10) in the form of a through-bore to the individual clearance compensation elements (4).

Abstract: A rocker arm is tilted by a cam so as to open and close a valve provided on a cylinder head. This arm comprises a pair of opposing wall portions which are made by folding a flat plate so that they oppose substantially in parallel and cylindrical expanding portions which are formed at tilting fulcrum shaft mounting portions located in a center of the opposing wall portions in the length direction thereof, the expanding portions being expanded in the direction of the tilting fulcrum shaft. The cylindrical expanding portions which are thicker than the opposing wall portions receive a load accompanied by the tilting motion so as to decrease bearing stress applied to the opposing wall portions.

Abstract: A rocker arm or finger lever (1) formed without machining (by a non-cutting shaping process) which has a U-shaped profile in cross section over almost its entire length which is open toward the top or the bottom, whereby the rocker arm or finger lever (1), in its end region in which it contacts a valve shaft end, is constructed double-walled.This rocker arm or finger lever (1) is distinguished in that the double-walled section or at least a strap (13) projecting over the longitudinal extension of the rocker arm or finger lever (1) is formed on an upper wall (10) which is bent under and lies between its two side walls (11, 12).A lever configured in this manner can be manufactured economically and has a good rigidity despite the reduced material used.

Abstract: A finger lever (1) is made as a sheet metal part without chip removal and, seen in transverse cross-section, it has a U-shaped profile opening downwards. An upper crosswall of this finger lever (1) comprises an opening (10) of essentially rectangular shape as viewed from above, a roller (3) which can be contacted by a cam (6) being arranged in the opening (10). Side walls (8 and 9) which extend downwards from the crosswall (7) receive a pin (5) which serves to mount the roller (3). Upper edges (11 and 12) of the side walls (8 and 9) have a convex shape. The rigidity of such a finger lever (1) is increased by the fact that the vertical extent of the side walls is increased to such an extent that the roller (3) is situated entirely within this vertical extent of the side walls (8 and 9).

Abstract: The invention provides a finger follower body defining a downwardly opening dome at one end, the dome having a seat which is a spherical band having a center and being concentric about a center line. A downwardly facing and downwardly convex valve contact surface is provided at the other end of the follower, and a pair of side walls define openings aligned about an axis. The openings are positioned in the side walls so that a bearing mounted in the openings will be essentially above a first imaginary line drawn between the center of the spherical band and the valve contact surface. The center line converges with another imaginary line drawn through the axis and at right angles to the first imaginary line. A finger follower incorporating the body is also provided.

Abstract: The clearance compensation element (5) of a lever (26) is retained axially within a bore (27). An end of the bore (27) comprises a diameter enlargement (29) in which a Belleville-type spring washer (16) with a radially outwards acting retention force is arranged to achieve a positioning of a pressure piston (7) of the clearance compensation element (5).

Abstract: The invention provides a new roller-type cam follower for transmitting valve-opening impulses from an overhead camshaft of an internal combustion engine. The follower has an integral, one-piece cold-formed cam follower body with a U-shaped, cam-facing cross-section at a support end of the follower which rides on a valve lifter post. Added height is provided by the combination of an inverted U-shaped cross-section of the movable, valve-engaging end of the follower with a separate insert secured into its section. The insert can be arcuate or spring-like and can be attached to a movable end of the cam follower or can be a cup-like insert attached to a support end of the follower. A cam follower with novel oiling structure is also disclosed.

Abstract: A valve actuating mechanism which can be set to three different strokes for a gas exchange valve includes a finger lever actuated by a control cam with a single lift curve, with the finger lever being selectively connectable to a longitudinal guide in the region of its bearing member via incorporation of a piston that is movable in various positions. In a first coupling position of the piston, the bearing member is fixed to the longitudinal guide so that the finger lever executes a maximum pivot during the lift phase of the cam. In a second coupling position of the piston the finger lever is moved axially along the longitudinal guide during a complete cam lift so that the opening cross section of the gas exchange valve is smaller than in the first coupling step. In a third coupling step of the piston, the finger lever executes an idle stroke-pivoting movement on its point of contact on the gas exchange valve which remains closed.

Abstract: A valve actuating lever for a valve drive of an internal combustion engine, includes a main body formed therein with a bore and a shaft received in the bore of the main body and defining a pivot axis about which the main body pivots, to thereby control up and down motions of a gas exchange valve in response to travel of a cam mechanism. The shaft has an outer surface area formed with tangential undercuts oriented transversely to the pivot axis and formed through non-cutting shaping process.

Abstract: A method of manufacturing a rocker arm includes blanking a piece of plate to obtain a base material for forming a rocker arm body, the base material being substantially U-shaped in plan view and having two protrusions which are substantially in parallel with each other. The base material is bent until the two protrusions are confronted substantially in parallel with each other, to provide a pair of side walls having a coupling portion between the side walls. Next, the coupling portion is curved between the side walls to provide a valve engaging portion, and the free end portions of the side walls are fixedly secured to the side walls of a pivot engaging member which is a plat plate having a semi-spherical portion formed by drawing.

Abstract: The invention provides a rocker arm and a method of making it having a cold formed steel body including parallel side walls and a bearing housing in the form of a sleeve attached to the side walls and defining a through opening to receive needle bearings. The sleeve has surfaces resistant to gas hardening so that after the arm has been subject to gas hardening only the main body is hardened leaving the sleeve unaffected. A method of making the rocker arm according to the invention includes preparing a sleeve having a surface which is resistant to gas hardening and which is unaffected by brazing temperatures; attaching the sleeve to the arm by brazing; and gas hardening the completed arm at a temperature less than the brazing temperature.

Abstract: A finger follower arm is provided for mounting on a support post to transmit oscillatory motion from a cam to a poppet valve to cause the valve to move linearly between open and closed positions. The arm has a support post end including a downwardly open domed socket for engagement on the support post and an upstanding peripheral wall. A tappet valve end defines a downwardly open channel having parallel side surfaces and a downwardly facing bearing surface between the side surfaces for engagement with said poppet valve. A pair of upstanding spaced-apart side walls extend between the support post end and the tappet valve end and blend into the peripheral wall which extends continuously between the side walls to rigidify the support post end. A method of manufacture is also described.

Abstract: A finger lever for a valve drive of an internal combustion engine which finger lever is contacted in a central region by a control cam and cooperates at one end with a gas exchange valve in the opening direction while being pivoted at another end by a bore on a shaft for pivoting relative to a cylinder head of an internal combustion engine by means projecting radially beyond a peripheral surface of a shaft in the region of a surrounding cam follower.

Abstract: A rocker arm comprises: a rocker arm body having a pair of side walls, a pivot shaft mounting portion at one end, and a valve engaging portion at the other end; and a roller rotatably mounted on the rocker arm body at the middle. In the rocker arm, at least the side walls are prepared by blanking a plate material, and the pivot shaft mounting portion and the valve engaging portion are connected, as bridges, between the side walls, and a thread hole is formed in the pivot shaft mounting portion in such a manner that its length is larger than the wall thickness of the side walls.

Abstract: A rocker lever assembly including lubricant directing structure is provided for an internal combustion engine drive train. A lubricant deflecting shroud is secured to a joint-contacting end of a rocker lever above open lubricant channels to direct lubricant to an adjacent drive train joint and minimize airborne lubricant.

Abstract: A rocker arm assembly for an internal combustion engine has a removable valve stem locating member at one end thereof to locate the rocker arm relative to the valve stem during assembly of internal combustion engine, and a lubricating fluid directional control member at another end thereof for directing lubricating fluid from the pivot member, such as a hydraulic lash adjuster, toward the cam/rocker arm interface to provide lubricating fluid thereto. Once assembled, the valve stem locating member may be removed to further reduce the overall mass of the rocker arm assembly.

Abstract: A rocker arm with a roller made with a metal plate and utilized in a valve actuating system of an engine is provided. The roller mounting rocker arm includes a rocker arm body (11) having a pair of side walls (11c) and a connecting portion 12 for connecting the side walls (11c), a roller (7) mounted between the side walls (11c), a pivot engageable recess (12a) formed on the connecting portion by drawing, and a valve stem receiving portion (14) formed at the other end of the side walls (11c). This roller mounting rocker arm has a high rigidity and is suitable for mass-production, and low cost is realized.