Abstract: A cylinder head for supporting and lubricating hydraulic valve lifters comprises a head member having a deck face adapted for mating with an engine block. The head member has a bottom face which is approximately perpendicular to the deck face. A plurality of sockets are formed in the head member and are adapted to receive a hydraulic valve lifter. A one-way gallery is formed in the head member above the sockets. The one-way gallery is parallel to a horizontal plane of the engine block when the head member is mated therewith. The one-way gallery is adapted to communicate with the valve lifters. A one-way passage is formed in the head member. The one-way passage has a gallery end which communicates with the one-way gallery and a supply end which is above the gallery end. A supply passage is formed in the head member. The supply passage has one end which communicates with the supply end and another end which communicates with a block port in the mating face. The block port is below the one-way gallery.

Abstract: In an internal combustion engine comprising a valve operating device which is disposed in a cylinder head coupled to an upper surface of a cylinder block and which includes a valve operating cam shaft connected to a crank shaft rotatably carried in a lower engine body portion including the cylinder block, and valve operation characteristic changing means for changing, in accordance with a variation in hydraulic pressure in a hydraulic pressure chamber, the operation characteristics of an engine valve which is supported in the cylinder head for opening and closing, a lower oil supply system and an upper oil supply system are disposed independently of each other.

Abstract: A four-stroke cycle engine unit for a working machine has generally a lubricating device for lubricating mechanical parts in a valve chamber and a cam chamber. The lubricating device comprises a body which has the cam chamber and a crank chamber, a cylinder head and a head cover having the valve chamber, and a mechanism for preventing a lubricating oil from escaping from at least one of through holes for push rods provided in a wall of the valve chamber and the cam chamber.

Abstract: An oil passage structure for a rocker-arm shaft for an internal combustion engine, comprises an outer cylindrical member for rotatably supporting rocker arms and an inner cylindrical member press-fitted into the outer cylindrical member. The inner cylindrical member employs at least one concavity having a given axial length for defining at least two axial oil passages.

Abstract: A cylinder head for a double overhead camshaft engine, with a plurality of intake valves and a plurality of exhaust valves for each cylinder, is covered by a cylinder head cover to support, for rotation, intake and exhaust camshafts. A hermetically sealed chamber, formed between the cylinder head and head cover as an oil jacket, is divided into two chambers, enclosing major parts of the intake and exhaust camshafts, respectively, which are in communication with each other near first ends of the chambers. An outlet hole is formed in the cylinder head cover so as to permit blow-by gas to flow out of the chamber. A cover, covering a gear train for operationally coupling the intake and exhaust camshafts, is bolted to one end of the head cover at several points around the gear train and to the cylinder head.

Abstract: Additive is supplied to the lubricating oil by an additive supplying pump according to TBN of the lubricating oil which is detected by a TBN sensor which detects the current produced by the impressed voltage. TBN is kept between 0 and 2.

Abstract: A multi-valve engine of the type having a line of cylinders, intake and exhaust camshafts, and rocker arms for operatively connecting valves to the camshafts includes a first valve group of three valves consisting of either intake valves or exhaust valves and a second valve group consisting of the other of either intake valves or exhaust valves. Each of the valves of the first valve group is oriented such that a valve stem thereof is inclined outwardly to one side of the line of cylinders, while each of the valve of the second valve group is oriented such that a valve stem thereof inclines outwardly to an opposite side of the line of cylinders. First hydraulic lash adjuster means for a centrally-located valve out of three valves of the first valve group is positioned closer to a bore center of the cylinder than the centrally-located valve, or on a delay side in the rotational direction of the camshaft.

Abstract: A lubrication system for a multi-cylinder internal combustion engine has a valve drive mechanism equipped with a row of hydraulic valve lash adjusters installed in a cylinder head of an engine block of the engine and a camshaft with journals which is disposed over the cylinder head and is attached, at one end thereof, with a camshaft pulley coupled to a crankshaft pulley by a belt. The lubrication system includes a main oil gallery extending lengthwise in the engine body, a lash adjuster oil gallery formed in the cylinder head and extending along the row of hydraylic valve lash adjusters, and a camshaft oil gallery formed in the cylinder head and extending parallel to the lash adjuster oil gallery. The main oil gallery is connected independently to one end of the camshaft oil gallery adjacent the camshaft pulley and to one end of the lash adjuster oil gallery remote from the camshaft pulley so as to supply them with pressurized oil, fed by an oil pump, in opposite direction.

Abstract: An improved prelubricator and pressurized lubricating fluid reservoir assembly for use primarily with an internal combustion engine, comprising a hollow cylindrical container coupled to the engine lubricating system and mounted at an angle between about 20.degree. and 90.degree. with respect to the horizontal. The container may be coupled to the engine by a valve assembly which permits the unrestricted flow of lubricating fluid out of the reservoir during start up of the engine or during periods of low oil pressure, and into the reservoir during periods of normal engine operation. Also disclosed is an assembly which is particularly advantageous for lubricating the center bearing of an exhaust-driven turbocharger.

Abstract: A lubricated cylinder wall in which an oil permeable cylinder ring is located on the inside surface of a cylinder. Oil from an oil supply channel located behind the oil permeable ring supplies the ring with oil. When the oil pressure in the oil supply channel is greater than the pressure inside the cylinder, oil is forced through the oil permeable ring and onto the inside surface of the oil permeable ring. Because the ring is located in the cylinder wall at a location above the bottom dead center location of the piston, upward motion of the piston inside the cylinder sweeps oil from the inside surface at the oil ring over the inside surface of the cylinder. The oil ring is installed in the cylinder by coiling it to a smaller diameter then the cylinder, placing the coiled ring in a groove on the inside surface of the cylinder, pressure fitting the coiled ring into the groove, and then honing the inside surface of the ring to be flush with the inside surface of the cylinder.

Abstract: A lubricating arrangement for the overhead camshafts of an internal combustion engine. The cylinder head assembly is formed with wells in which lubricant can accumulate during the running of the engine and which surround at least in part the camshafts. When the engine stops running, the wells will retain lubricant so that the camshaft will be lubricated immediately upon start up. The wells associated with at least one of the camshafts are formed at least in part by the bearing caps that journal the camshafts. One camshaft is supported by a greater number of bearings than the other camshaft and the fastening means associated with the camshaft bearings of the camshaft having the greater number of bearings are smaller than those associated with the other camshaft so as to insure equal torque down.

Abstract: In an engine having a camshaft mounted on a cylinder head via plural camshaft supporting portions; a camshaft sprocket coaxially coupled to the camshaft; an idler sprocket rotatably supported between the camshaft and the crankshaft on the cylinder head; a first chain reeved around the crankshaft and the idler sprocket; and a second chain reeved around the idler sprocket and the camshaft sprocket, an oil jet hole is formed in the frontmost camshaft supporting portion in communication with a main oil passage via an annular oil groove formed in the camshaft and an inclined oil groove formed in the cylinder head, so that lubricant can be sufficiently jetted from the oil jet hole to the second chain located near the frontmost camshaft supporting member, without use of an additional oil jet pipe member.

Abstract: In an overhead-valve type internal combustion engine, a crank chamber is connected in communication with one side portion of a valve actuating mechanism chamber through a breather passage composed of a passage inlet a passage portion, an outlet chamber and a passage outlet communicated to one another in order. The outlet chamber is formed in the space outside the one side portion of the valve actuating mechanism chamber so as to extend long in the direction of side-by-side arrangement of valve stems. The passage outlet is opened long in the direction of side-by-side arrangement of the valve stems in such a manner as to face the valve stems. A portion, on the side of the passage outlet, of the ceiling surface of the valve actuating mechanism chamber is formed as an inclined surface which increases its height dimension as it gets nearer to the side of rocker arms from the side of the passage outlet.

Abstract: An overhead camshaft structure for a double overhead camshaft engine having at least three in-line cylinders and two camshafts which are formed with series of pairs of cam lobes and series of camshaft journals, respectively, and are operatively connected with each other by helical gears comprises a thrust collar formed on each camshaft, a thrust bearing formed with a thrust restrictive groove consisting of an upper half and a lower half, narrower than the upper half, for receiving therein the thrust collar, and an oil passage consisting of a radial passage portion penetrating through the thrust collar and an axial passage portion formed in each camshaft for allowing oil to pass up to each cam lobe and camshaft journal for lubrication. The radial passage is directed in parallel with a straight line connecting an axial centerline of rotation of each said camshaft and a juncture of a valve opening ramp of said cam lobe adjacent to said thrust collar.

Abstract: A camshaft driving arrangement for an internal combustion engine comprises a cylinder head formed with a cam chamber, and an idler chamber communicating with an oil pan and an end face of the cylinder head. The end face includes openings allowing communication between the cam chamber and the idler chamber. An idler shank is fixedly mounted on the cylinder head. An idler sprocket is rotatably supported on the idler shank, and includes a radial portion disposed adjacent the end face. The end face, the radial portion, and the idler shank cooperate with each other to define a passage allowing oil flowing out of the cam chamber via the openings to flow down toward the oil pan.

Abstract: A positive crankcase ventilation system for a V-type internal combustion engine has elongated first and second cylinder banks provided with first and second rows of cylinders offset, respectively, in a lengthwise direction to each other, thereby forming a dead corner on one end of each cylinder bank. A series of reinforcing bulk heads for reinforcing a series of main bearings holding a crankshaft divide a crankcase into a series of crankcase chambers. Each crankcase chamber is provided with a bottom opening and vent holes formed in the bulk head. An air introduction passage is provided by the side of and at the middle of each row of cylinders in the cylinder block for introducing filtered air into and through the crankcase and oil return passages are formed in each dead corner.

Abstract: A lubricant supplying system for a DOHC type multicylinder internal combustion engine comprising a plurality of cylinders arranged in series in a cylinder block, a pair of cam shafts parallel to each other and rotatably supported by a cylinder head and cam holders fixed to the cylinder head at opposite sides of the respective cylinders along the cylinder arranging direction, a plurality of cams including low speed cams corresponding to intake and exhaust valves of the respective cylinders and fixed to the cam shafts, a plurality of rocker arms in slidable contact with the respective cams corresponding to the intake and exhaust valves of the respective cylinders, and a connection switching mechanism for switching connection and disconnection of the rocker arms in response to a hydraulic pressure to vary the operating states of the valves responsive to the operating state of the engine, wherein a hydraulic pressure supply passage independent from an oil supply passage for supplying a hydraulic pressure to the c

Abstract: A wrist pin lubricating system for a multi-cylinder two-cycle engine comprises a passage system for collecting and distributing crankcase condensate to the piston wrist pin bearings. A slot in each piston skirt provides continuous communication between each wrist pin bearing and a passage in the cylinder wall delivering condensate from the engine crankcases. The condensate is collected at the low point of each crankcase and is pumped to the wrist pin bearings by the pressure differential between two crankcases. Check valves are provided in the passages to maintain a directional flow of the condensate.

Abstract: It is a lubrication device for two-stroke gasoline engine, in which the cylinder is furnished with one to three lubricant outlets; the feature of the lubricant outlets is that the height position of the lubricant outlets is placed just under the bottom piston ring upon the piston reaching the lower dead point, but the location of the lubricant outlet can be placed on the exhaust side, the major thrust side or the minor thrust side.

Abstract: A structure of internal combustion engine comprises a cylinder member composed of a cylinder which accomodates a piston connected with a crankshaft, a crankcase provided to accomodate said crankshaft, a rocker case provided to accomodate a valve actuating mechanism, an oil return passage constituting means for leading oil in said rocker case into said crankcase, and a restraining means for restraining an air flow within said crankcase from entering into said oil return passage constituting means. By the effect of the restraining means provided in relation to the oil return passage constituting means, the air flow generated by the rotation of the crankshaft does not work as a dynamic pressure of hingering the flowingdown of oil.

Abstract: In a diesel engine having an angled cylinder bank with an individual cylinder head received on a sloping mounting surface over which return oil flows, a cylinder head wear ring or seat ring is provided to accept wear between the head mounting flange and the mounting surface. The seat ring is modified to incorporate around its outer periphery a seal having resilient beads that engage the opposed mounting and head flange surfaces to prevent oil from passing through the joint and entering the engine exhaust system.

Abstract: An upper cylinder area lubrication system is disclosed that dispenses a small amount of lubricant to the upper cylinder area of an internal combustion engine at regular intervals for a metered period of time. Typically, the lubricant is dispensed for one second every thirty minutes. An electric pump is used to draw the lubricant from the reservoir and apply it, preferably through a mixing chamber in the gasoline line located just before the gasoline is applied to the firing chambers. The control of the pump is via a solid-state timing device that separately sets the alternate on periods and the off periods.

Abstract: A reciprocating internal combustion engine comprises a cylinder block having at least one bore formed therein and a cylinder liner fitted into each bore. The cylinder liner defines a cylinder in which a piston is slideable, with a combustion chamber being disposed to one side of the piston and a crank mechanism to the other side. An annular groove is provided at the mating surfaces of the cylinder liner and the cylinder block, for example in the outer surface of the liner, and at least one lubricant discharge nozzle is provided in the cylinder liner in communication with the annular groove and opening on the crank side of the piston when the piston is at the combustion chamber end of its stroke. The nozzle is angled towards the combustion chamber such as to discharge lubricant onto the crank side of the piston.

Abstract: A liquid dispensing device particularly suitable for automatically dispensing a lubricant to the combustion zones of an internal combustion engine. A sealed lubricant reservoir conjoins with an air and liquid blending chamber formed by a housing. The housing is sealed save for a minute air bleed aperture. An inlet to the chamber for the liquid is provided in an upper part of the housing and an outlet from the chamber provided in a lower part of the housing. The outlet is set up higher than a lower extremity of the chamber such that the outlet operates as a weir. The outlet conjoins with a turbulating device comprised of an axially adjustable pin having an external helical groove. The pin is mounted in a bore conjoining with a conduit to a required dispensing port, for example, in an inlet manifold of an engine. Inlet manifold vacuum draws lubricant from the reservoir via the air with lubricant blending chamber and the turbulating device.

Abstract: A splash lubricated over head valve engine provided with a gas inducing and a oil return passages both communicate the crank room and the rocker arm chamber, and with a breather disposed inside the rocker arm cover, wherein: the outlet opening of the gas inducing passage and inlet opening of the breather are disposed at opposite end portions of the rocker arm chamber, so as to make the flow of blow-by gas in the rocker arm chamber traverse across the rocker arms aslant.

Abstract: A cylinder head for an internal combustion engine is constructed with a camshaft holder assembly. The camshaft holder assembly consists of several cylindrical recesses which form the camshaft support bearing, the camshaft positioning guide, and an accommodating chamber. Lubricant flows through the camshaft support bearing and accumulates in the accommodating chamber, which encloses a coupling between the camshaft and the drive shaft of an auxiliary device, for lubricating and cooling the coupling. The lubricant is maintained at a relatively constant level in the accommodating chamber by an inclined flow passage to the lubricant return passage in the cylinder head and the splashing action of the coupling within the accommodating chamber.

Abstract: The radial internal combustion engine has two pairs of opposed cylinders arranged on axes at 90 degrees to one another. Each pair of cylinders has opposed pistons, interconnected by a piston rod and scotch-yoke assembly. A piston rod is rigidly connected to each piston and extends inwardly to a heel having a load face transverse the axis of the crankshaft. A pair of rollers are mounted on the throw of the crankshaft with each roller being in alignment with and engaged by the load faces of a pair of the piston rods. Apertured retention plates on each side of each roller are fixed to the heels. The rollers engage the load faces. The crankshaft extends through the apertures in the retention plates and the plates are fixed to the heels by dowel pins positively locating and spacing the heels and the retention plates.

Abstract: A lash adjuster oil-supplying device has an oil path formed within the hollow center of a camshaft of an overhead camshaft-type engine. An oil jet hole is formed in said camshaft which communicates with said oil path. A first oil passage extends from a cylinder head through the camshaft housing to the camshaft, and a second passage extends from the camshaft through the camshaft housing to a passage for supplying oil to lash adjusters, which is formed in the cylinder head. Oil enters the oil path within the camshaft from the first oil passage, and, after passing through the oil path, is supplied to the passage for supplying oil to lash adjusters through the second passage. A portion of the oil passing through the oil path is ejected through the oil jet hole to lower and regulate the oil pressure supplied to the lash adjuster, independent of engine speed. This prevents pump-up of the lash adjuster without using a special oil-pressure regulator.

Abstract: A suction valve seat lubricating apparatus for a multi-cylinder diesel engine wherein a small amount of lubricant is introduced into a suction manifold and it is carried by the compressed suction air to suction valve seats to lubricate them. A partition wall is disposed within the suction manifold for dividing the same into two chambers. Each chamber has a lubricant supply nozzle connected thereto.

Abstract: A diesel engine has a first lubrication system, containing conventional engine oil, used to lubricate that section of the engine subjected to excessive wear--the valve train including the cam shaft, valve lifters, rocker arm, valve stems, etc., and a second lubricant system, utilizing diesel fuel, for lubricating the remaining section of the engine--the crankshaft and associated parts, pistons, connecting rods, etc. By being exposed to crankcase blowby exhaust gases, diesel fuel used to lubricate the crankshaft, etc. absorbs pollutants and contaminants contained therein and recirculates these contaminants through the fuel system to be burned and exhausted. By constantly being lubricated with fresh lubricant, wear on these specific parts is reduced. Frequent lubrication changes have been eliminated because the diesel fuel/lubricant is continuously changed and circulated through fuel system.

Abstract: An engine comprising; a substantially cylindrical housing; a rotor rotatably mounted in said housing on an axis parallel with the longitudinal central axis of the housing to execute an orbital motion within the housing, a plurality of tubular elements each slidably mounted over fixed piston elements projecting substantially inwardly from the housing; said tubular elements being closed at their inner ends and having their inner ends in slidable driving engagement with said rotor for causing reciprocation of the tubular elements over the piston elements upon rotation of the rotor; and the volume of the space defined by the interior of the tubular element and the piston element varying with the rotation of the rotor.

Abstract: An internal combustion engine comprises a cylinder, a piston reciprocating in the cylinder, piston rings arranged on the periphery of the piston, and at least a pair of oil ports symmetrically provided in a wall member of the cylinder. The oil ports communicate with the space between the wall member and the piston and are positioned to open onto the portion below the lowermost piston ring during the reciprocation of the piston. A system supplies a portion of the lubricating oil for the internal combustion engine under pressure to this space through the oil ports, and conduits communicate the oil ports with the supply system.

Abstract: The radial bearing is constructed such that the lubricant passing from between the rotating shaft and the stationary bearing is drawn back into the rearmost terminal region of the groove between the bearing and shaft in order to eliminate cavitation. The connecting rod and bearing cap may be formed with an annular groove from which the lubricant is drawn back into the groove between the bearing and shaft or the outer periphery of the bearing can be provided with a groove from which the lubricant can be drawn. Also, the inner surface on the bearing can be provided with one more groove extensions to permit return of the lubricant to the rearmost region.

Abstract: An oil circulating and cooling system for an internal combustion engine having an oil pump to pump the oil under pressure throughout the oil distribution system of the internal combustion engine and an oil pressure regulation circuit in parallel with the oil distribution system of the internal combustion engine. The oil pressure regulation circuit comprises a relief valve for diverting a portion of the oil from the oil pump to the oil pressure regulation circuit thereby setting the maximum value of the oil pressure throughout the oil distribution system of the internal combustion engine and an oil cooler for cooling the oil which has been diverted to the oil pressure regulation circuit. Since the oil temperature and oil pressure at the output of the oil pump increase with increased engine rpm, the oil is only cooled when the engine rpm is high.

Abstract: A preoiler and lubricating fluid reservoir for use primarily with an internal combustion engine is disclosed. A hollow cylindrical reservoir is provided with an internal slidable piston which divides the cylinder into a compressed air retaining section and a lubricating fluid retaining section. A solenoid controlled valve assembly, which is controlled by the vehicle's oil pressure sensor unit, regulates the flow of lubricating fluid either out of the reservoir either during start up of the engine or in instances of low oil pressure, and into the reservoir during periods of normal engine operation. The valve is structured to insure that oil flow out of the reservoir during preoiling is unrestricted but that refilling of the reservoir is accomplished only after the engine's oil pressure has come up to normal operating level. The system also serves to provide emergency oiling of the engine should the oil pump fail or a loss of oil pressure be encountered.

Abstract: A fuel and lubricating oil supply device, wherein lubricating oil for lubricating the wall surfaces of a combustion chamber of an engine is fed to the engine, together with fuel. This fuel and lubricating oil supply device comprises; a device for heating an air-fuel mixture charge, which heating device is provided in an intake passage in which an air-fuel mixture charge is produced; and a lubricating oil supply portion open to the intake passage in the downstream of the heating device, whereby a change in quality or deterioration due to heat, of lubricating oil is prevented.

Abstract: A system for use within an internal combustion engine to facilitate the starting of the engine while cold. The system comprises a reservoir for holding a predetermined volume of lubricant, conduit means extending from the reservoir and having outlets positioned above a valve of each cylinder of the engine, and delivery means responsive to the actuation of the engine's starter for forcing lubricant at a predetermined substantially uniform rate from the reservoir and through the conduit means, whereby lubricant is delivered through the engine valves and cylinders, for the sealing thereof, continuously during the starting of the engine.