Abstract: Systems and methods for intermittent supply of lubricating oil to a tip of a rocker arm assembly. In one embodiment, a lubricating oil may be selectively to a tip of a rocker arm via oil channels aligned only during opening of a valve coupled to the tip.

Abstract: An engine camshaft has a lubricating oil passage formed along the longitudinal axis of the same, a cam communicating oil hole is radially formed from the lubricating oil passage to an outer peripheral surface of the camshaft at the same axial position as an engine valve. Cam lubrication holes are radially formed from the inside to cam surfaces of cam lobes formed around a cam carrier fitted around the camshaft. One of the cam lubrication holes of the cam lobes shifted to a position for operating the valve communicates with the cam communicating oil hole of the camshaft to supply lubricant oil.

Abstract: A lubricant scoop is disclosed. The lubricant scoop includes an annular body configured for engagement with a shaft rotating about a central axis. The annular body includes a first annular portion and a second annular portion disposed adjacent the first annular portion. The first annular portion includes a radially oriented entrance surface and a first axially oriented transition surface. The second annular portion includes a second axially oriented transition surface, a primary redirection member spaced radially outward from the second axially oriented transition surface, a radially oriented exit surface and an exit conduit having an opening positioned on the radially oriented exit surface.

Abstract: An assembly for rotational equipment includes a stationary structure and a rotating structure. The stationary structure is configured with a first fluid conduit. The rotating structure is configured with a second fluid conduit and a fluid scoop for the second fluid conduit. The second fluid conduit is fluidly coupled with the first fluid conduit through an annular plenum formed by and radially between the stationary structure and the rotating structure. The fluid scoop projects radially into the annular plenum.

Abstract: There is provided a liquid-capturing shaft (30). The shaft is hollow, arranged for rotation about its longitudinal axis (31), and has a cylindrical wall (32) defining an inner surface (33) and an outer surface (34) of the shaft and through which are formed a plurality of circumferentially spaced apart inlet openings (35). Each inlet opening (35) has a respective inwardly and axially facing capture surface (40) which extends from the outer surface (34) of the shaft to the inner surface (33) of the shaft.

Abstract: An outboard marine engine comprises a vertically-aligned bank of piston-cylinders. An axially elongated camshaft operates a plurality of valves for controlling flow of air with respect to the vertically-aligned bank of piston-cylinders. The camshaft vertically extends between a lower camshaft end and an upper camshaft end. A lubricant passage axially conveys lubricant through the camshaft. An air outlet is located at the upper camshaft end. A valve is configured to open and close the air outlet to thereby facilitate lubrication of the plurality of valves at startup of the outboard marine engine.

Abstract: An oil passage which supplies hydraulic oil to a cylinder deactivation apparatus (CDA) that operates by hydraulic pressure may include a high pressure passage, a low pressure passage, and an orifice, all of which may be integrally formed in either a cylinder head or a cam carrier. The high pressure passage may be connected to an oil supply apparatus and receive oil therefrom. The low pressure passage may be coupled to the high pressure passage and receive pressurized oil therefrom and form a low pressure relatively lower than a pressure in the high pressure passage. The low pressure passage may be connected to supply a hydraulic pressure to the CDA. The orifice may couple the high pressure passage to the low pressure passage, communicate the high pressure passage and the low pressure passage and may be formed to supply oil from the high pressure passage to the low pressure passage.

Abstract: A rolling bearing apparatus includes a bearing portion having an outer ring, an inner ring, a plurality of balls, and a cage that holds the balls, and an auxiliary portion provided adjacently to the bearing portion in an axial direction. The auxiliary portion has an auxiliary body portion provided adjacently to the outer ring in the axial direction and an extension portion extending in the axial direction from the auxiliary body portion and interposed between the cage and the inner ring. In the extension portion, a channel is formed that penetrates the extension portion in a direction inclined with respect to a radial direction. The channel is open in an outer peripheral surface of the extension portion, which faces the cage, and in an inner peripheral surface of the extension portion, which faces the inner ring.

Abstract: A tappet for a valve train or a pump drive particularly a cup tappet (1) having a hollow cylindrical outer body on whose wall region (4) an anti-rotation element (9) is received in a window-type through-opening (15), the anti-rotation element (9) being seated through support surfaces (12, 13) of a head (10) on an outer diameter (14) of the wall region (4) and extending with a shank (11) projecting from the head (10) through said through-opening (15). The anti-rotation element (9) is fixed via a welded joint. In order to fix the anti-rotation element (9) with low manufacturing costs and, at the same time, with only an insignificant impairment of the outer body, the welded joint is made between the shank of the anti-rotation element (9) and an inner body that is received in the outer body and is connected to the outer body. A method of making a tappet of the aforesaid tappet is also provided.

Abstract: A check valve of a cylinder head controls an oil supply amount to the cylinder head according to oil pressure of a hydraulic pump. The check valve of the cylinder head according to the exemplary embodiment of the present invention may include: a lower cover of cylindrical shape including upper and lower surfaces, the upper surface being open and the lower surface having at least one first oil hole for receiving oil from the hydraulic pump; an upper cover coupled to the upper surface of the lower cover and having a sliding axle and at least one second oil hole; a first plate mounted in the lower cover, sliding vertically along the sliding axle, and having at least one third oil hole that is disposed eccentrically to the at least one second oil hole; and a second plate disposed between the first plate and the lower cover, sliding vertically along the sliding axle, and having at least one fourth oil hole disposed eccentrically to the first, second, and third oil holes.

Abstract: A lubrication apparatus for a four-stroke engine that prevents lubrication failure from occurring around the crankshaft and reliably prevents oil from remaining in a valve operating chamber includes: an intake part positioned below the level of an oil A in an oil reservoir even if the oil reservoir is tilted and the level of the oil A changes; an oil feeding passageway that sucks up the oil A from the intake part and supplies the oil A to the crank chamber; and an direct passageway that allows communication between a valve operating chamber and a crank chamber when a negative pressure is created in the crank chamber. Open end parts of the oil feeding passageway and the direct passageway which are open in the crank chamber are provided to open as the piston moves from a position near the top dead center to the top dead center.

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: First and second oil flow passages are defined in a wall portion of a transmission casing. The first oil flow passage has an open end exposed to an interior of the casing. The second oil passage is connected to the first oil passage through a connection opening defined by the first oil passage. A separate pipe member has a predetermined end portion that is inserted into the first oil passage from the open end of the same. The predetermined end portion comprises a cylindrical portion having a fixed length; an end opening defined by an end of the cylindrical portion and exposed to the first oil passage; and an orifice opening defined by a side wall of the cylindrical portion. The orifice opening is blocked by an inner wall of the first oil passage when the connection opening takes a first position relative to the open end of the first oil passage, and exposed to the second oil passage when the connection opening takes a second position relative to the open end of the first oil passage.

Abstract: A device that relieves lubricant pressure in a divider block lubrication system into a fluid reservoir, a container, or directly back into the compressor frame to which the tubing is connected. This eliminates housekeeping, environmental, safety, and compressor component failure concerns associated with current atmospheric rupture assemblies that relieve directly to the atmosphere. The environmental compressor protection assembly contains a spring set to a pre-determined pressure. Lubricant pressure in excess of this pre-determined set pressure results in spring compression and opening of a relief path. The assembly preferably remains in a full open position and must be must be manually reset to the closed position to prevent fluid flow in the system. The relief path can lead to a fluid reservoir, a container, or directly back into the compressor frame. Flow of lubricant through the relief path results in loss of flow to the lubrication system.

Abstract: An oil return structure for a vehicle drive apparatus includes a hydraulic control apparatus disposed below an oil supply target device to which oil for lubricating and cooling is supplied; and an oil pan that retains the oil that is supplied to the oil supply target device is provided below the hydraulic control apparatus, wherein a bypass oil path is formed in a body of the hydraulic control apparatus, the bypass oil path being structured in order to guide the oil from the oil supply target device from an upper surface of the body, inside the body and then discharge the oil from a side surface of the body.

Abstract: A lubricating oil composition comprising (a) a major amount of a base oil of lubricating viscosity and (b) a minor deposit-inhibiting effective amount of a reaction product prepared by transesterifying at least one glycerol ester and at least one non-glycerol polyol ester is provided. Methods for its use are also provided.

Abstract: In a lubricant dosing arrangement for the lubrication of valve shafts on the cylinder heads of piston engine wherein the valve shafts are axially movably supported in housing bores formed in the cylinder heads and the housing bores include spaced lubricant seals so as to form between the seals around the valve shaft lubricant reservoirs, means are provided for supplying lubricant to the lubricant reservoirs and the valves shafts include means for permitting passage of lubricant out of the reservoir at a rate depending on the lift movement of the valve shafts so as to dose the lubricant volume permitted to flow out of the lubricant reservoir for the lubrication of the valve shaft.

Abstract: Embodiments are directed to lubricant delivery systems and methods. In one embodiment, the system comprises a lubricant feeder; a pipe comprising at least one nozzle; and at least one lubricant flow outlet extending upwardly from the nozzle. The nozzle comprises at least one flow area reducing portion along the length of the pipe near the lubricant feeder and the at least one lubricant flow outlet is configured to provide lubricant to at least one portion of a machine. In one embodiment, a method for controlling flow is provided comprising; delivering lubricant to an initial section of a lubricant delivery system; increasing the speed of the lubricant as it approaches a first outlet; allowing a portion of the lubricant to exit through the outlet; decreasing the speed of the lubricant after it passes the outlet; and allowing at least a portion of the lubricant to exit through a second outlet.

Abstract: A device that relieves lubricant pressure in a divider block lubrication system into a fluid reservoir, a container, or directly back into the compressor frame to which the tubing is connected. This eliminates housekeeping, environmental, safety, and compressor component failure concerns associated with current atmospheric rupture assemblies that relieve directly to the atmosphere. The environmental compressor protection assembly contains a spring set to a pre-determined pressure. Lubricant pressure in excess of this pre-determined set pressure results in spring compression and opening of a relief path. The assembly preferably remains in a full open position and must be must be manually reset to the closed position to prevent fluid flow in the system.

Abstract: Drain holes are arranged in positions offset from valve holes of a valve body. The drain holes have a long chimney-shaped space such that even if insulation material, that has peeled off of an electric motor, is suspended in oil, it is less likely to enter drain chambers through the drain holes.

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

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

Abstract: In a cam journal (12A) in which a timing-advance oil passage (12a) and a timing-retard oil passage (12b) are provided as a first oil passage for VVT, an oil passage (102c) for LA is provided as the second oil passage. The timing-advance oil passage (12a) and the timing-retard oil passage (12b), which are formed on the surface of the intake camshaft (12), are separated from the oil passage (102c) for HLA by a lower cam bearing (202). Thus, it is possible to provide the control oil passages for VVT and the oil supply passage for HLA in one cam journal (12A).

Abstract: Oil ports formed on a cylindrical sleeve of an oil passage switching valve are covered with respective filters. The filter is formed in a ring shape by rounding a resilient metal strip having plural filter holes formed thereon. The filter clings around the outer periphery of the cylindrical sleeve by its own resiliency. A contacting portion is formed on one of overlapping ends of the filter ring or on both overlapping ends so that the contacting portion engages with the other overlapping end to prevent the filter ring from being enlarged by an oil pressure applied to the filter from its inside. Foreign particles in the oil are surely prevented from entering into the sleeve by the filter covering the oil port in close contact therewith.

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: To enhance the responsiveness of a relief valve, to lower the height of an engine, and to remove foreign matter entrapped in oil. A cylindrical relief valve for a dry sump type engine is disposed in parallel to a main gallery which is disposed in parallel to a crank shaft. Alternatively, the relief valve is disposed in an oil tank. Furthermore, a strainer for straining oil recovered in the oil tank is provided in the oil tank.

Abstract: A cam drive is provided for a valve control of a mixture-lubricated internal combustion engine that has a cylinder, and a cylinder head in which is disposed a poppet valve which is actuated by a pivotable rocker arm. Mounted in a cam chamber is a control cam that is driven by the crankshaft of the engine and on the cam path of which rests a drag lever that transfers the cam lift to the rocker arm. To achieve a reliable mixture lubrication, a flow guidance element is disposed in the annular chamber between the peripheral wall of the cam chamber and the maximum diameter of the path of a cam nose. The flow guidance element is provided with a flow edge that is disposed adjacent to the drag lever in the vicinity of the path diameter of the cam nose.

Abstract: An improved lubrication arrangement for an internal combustion engine of the push tube (59) type. A carrier structure (43) is fixed relative to an upper surface of the cylinder head (31) and includes a fixed fulcrum location (49) for each rocker arm (51). The carrier structure (43) defines a lubrication passage (67,69) providing lubrication fluid to the fixed fulcrum location (49). The engine block (11) and the cylinder head (31) cooperate to define a fluid chamber (81) surrounding the push tube (59). Lubrication fluid flows out adjacent the fixed fulcrum location (49) and flows under the influence of gravity into the fluid chamber (81). The push tube defines a plurality of openings (83) whereby lubrication fluid flows from the fluid chamber (81) into the interior (85) of the push tube.

Abstract: A lubricant supply system for an engine includes an oil pump activated by an engine having a crank system and a valve system, a main passage connected to the oil pump for supplying a lubricant to the engine, a crank system passage branched from the main passage for supplying the lubricant to the crank system, a valve system passage branched from the main passage for supplying the lubricant to the valve system, an oil pressure relief valve disposed in the crank system passage, and an oil pressure detecting type orifice valve disposed in the valve system passage.

Abstract: A lubrication system for a vibratory apparatus such as a hydraulic striking device. The system includes a lubricant pump for pumping lubricant to one or more points of lubrication on the device and a drive for the pump powered in response to vibration of the device. The system includes a base for attachment to the device for vibration therewith, and a lubricant pump for pumping lubricant from a supply. The pump includes a cylinder and a plunger reciprocable in the cylinder through a stroke between a retracted position for intake of lubricant into the cylinder and a forward position for delivery of the intake from the cylinder. A weight is mounted on the base for oscillation in response to the vibration of the device, oscillation of the weight effecting reciprocation of the plunger through a stroke.

Abstract: An over-head cam type V-type engine comprises a crank shaft provided to penetrate through a crank chamber, a cam shaft provided in a head portion of each of two cylinders provided above the crank chamber, an intermediate shaft provided to penetrate through the crank chamber, a chain chamber for accommodating a chain to transmit a rotation of the crank shaft to the intermediate shaft, a first chain tunnel for accommodating a chain to transmit a rotation of the intermediate shaft to the cam shaft of one of the first and second cylinders, a second chain tunnel for accommodating a chain to transmit the rotation of the intermediate shaft to the cam shaft of the other cylinder, forcible oil supply means for supplying a lubricating oil from an oil sump to the head portion of each of the first and second cylinders, a first lubricating oil feedback path formed to reach the oil sump from the head portion of one of the first and second cylinders through the first chain tunnel and the crank chamber, and a second lubricat

Abstract: In an engine valve assembly, a valve lifter comprises a cylindrical main body portion and a head wall portion by which an opening of the cylindrical main body portion is enclosed and with which a cam is brought in contact, a valve stem is contacted on an axial center of the valve lifter and is disposed obliquely with respect to a direction of gravity, an exit of a lubricating oil supply bore is opened to an inner space of the head wall portion and is revolved due to a revolution of the valve lifter caused by a friction developed on the basis of a revolution of the cam, and a spring retainer supports an end of a valve spring, the spring retainer being attached onto the valve stem.

Abstract: This invention relates to a method of operating a camless internal combustion engine, said method comprising: (A) operating said engine using a normally liquid or gaseous fuel composition; and (B) lubricating said engine using a low-phosphorus or phosphorus-free lubricating oil composition, said low-phosphorus or phosphorus-free lubricating oil composition optionally containing an extreme-pressure additive comprised of metal and phosphorus, provided the amount of phosphorus contributed to said low-phosphorus or phosphorus-free lubricating oil composition by said extreme-pressure additive does not exceed about 0.08% by weight based on the weight of said low-phosphorus or phosphorus-free lubricating oil composition.

Abstract: A cam drive is provided for a valve control of a mixture-lubricated internal combustion engine that has a cylinder, and a cylinder head in which is disposed a poppet valve which is actuated by a pivotable rocker arm. Mounted in a cam chamber is a control cam that is driven by the crankshaft of the engine and on the cam path of which rests a drag lever that transfers the cam lift to the rocker arm. To achieve a reliable mixture lubrication, a flow guidance element is disposed in the annular chamber between the peripheral wall of the cam chamber and the maximum diameter of the path of a cam nose. The flow guidance element is provided with a flow edge that is disposed adjacent to the drag lever in the vicinity of the path diameter of the cam nose.

Abstract: An intermittent oil supply system is provided that discharges intermittently some of the oil supplied to the cam bearing 53 from the oil supply path 71 formed on the axial center of the camshaft 4 and via the journal path 73 toward the side of the cam 68 and the tappet 48 in line with the rotation of the camshaft 4. The intermittent oil supply system is structured so that an oil groove 77 along the axial direction of the camshaft 4 is formed, for example, on the bearing surface 59a of said cam bearing 53, and at least one end of this oil groove 77 opens on the end face 59b of the cam bearing 53 (bearing housing 59).

Abstract: A valve lifter apparatus is provided including a valve lifter body with predetermined oil paths for increase lubrication to a rolling member for engaging a lobe of a camshaft. An anti-rotation member for prevent rotation of the valve lifter in the lifter bore of the engine block as the valve lifter reciprocates is also provided. The valve lifter apparatus may be employed in high revolutions per minute engines to decrease valve lifter wear and increase performance.

Abstract: In order to supply a sufficient quantity of lubricating oil to the entire valve operating mechanism, we designed a lubrication device for an overhead valve engine. A first breather passage goes from the valve operating mechanism chamber to the crankcase, passing through the cylinder head and cylinder. The first breather passage opens in the vicinity of the spring retainer for the intake valve on the surface of the cylinder head which faces the valve operating mechanism chamber for the valve operating mechanism. The opening of the first passage and the vicinity of the exhaust valve are connected by a second breather passage. This second passage comprises a groove formed by cutting in the valve operating mechanism chamber surface of the cylinder head, and a tunnel formed between an oil guide wall which goes up from the valve operating mechanism chamber surface of the cylinder head and the peripheral wall of the head. One end of this groove connects to the opening of the first breather passage.

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: An engine powered hand-held power tool and engine lubrication method is provided, the power tool being intended to be carried by an operator during use. The power tool has a frame, including a handle to be grasped by the operator, an implement affixed to the frame having a rotary input member, and a small four-cycle, lightweight, internal combustion engine attached to the frame for driving the implement. The four-cycle engine has a lightweight aluminum alloy engine block having a cylindrical bore and an enclosed oil reservoir formed therein. A crankshaft is rotatably mounted in the engine block for rotation about a crankshaft axis. A piston reciprocates within the bore and is connected to the crankshaft by a connecting rod. An oil splasher driven by the crankshaft intermittently engages the oil within the enclosed oil reservoir to splash-lubricate the engine.

Abstract: A push rod operated multi-valve V-type engine particularly adapted for use in motorcycles or like vehicles and which engine is air cooled. The engine employs a very simplified construction and overhead valve actuating mechanism utilizing push rods. The push rods are contained within push rod tubes formed at one side of the engine that provide a neat appearance and ease of servicing without adversely affecting the air cooling. A composite cylinder head construction is employed, as well as an improved and simplified lubricating system for the pair of driven camshafts. Furthermore, a decompression system is incorporated in the valve actuating mechanism so as to facilitate starting.