Abstract: An oil pan 1 includes: an oil pan body 2 having a reservoir 21 for storing oil circulated in an engine E and returned to the reservoir 21; and a separator 3 having a vertically extending sidewall unit 4 partitioning the reservoir 21 into a first reservoir 21a for storing high-temperature oil and a second reservoir 21b for storing low-temperature oil. The first reservoir 21a has a suction-member-placement region 22 in which a member for sucking oil is provided. The separator 3 has an inclined portion 61 extending, to the suction-member-placement region 22, from a portion below a downstream end of a return pipe Rt for allowing oil to return to the first reservoir 21a.

Abstract: A lubricant transfer connection for transferring lubricant from a lubricant transfer line which feeds into a lubricant supply bore machined in a bearing support housing. A lubricant transfer bushing is located at the moving interface between the lubricant supply bore machined in the bearing support housing and a lubricant input port in a cam follower lever arm. The lubricant transfer bushing is designed so that it provides a movable, sealed, connection between the lubricant channel in the bearing support housing and the lubricant input port in the cam follower lever arm, in all positions of the cam follower and cam follower lever arm.

Abstract: A lubrication system for an internal combustion engine provides drain openings at locations within individual crankcase portions where residual oil collects during normal operation. The drain openings are connected to orifices formed through cylinder walls of other crankcase portions of the engine. Conduits connect preselected drain openings to associated orifice check valves to pump the residual oil from the collecting regions to the cylinder walls of other crankcase portions using differential pressures that occur naturally between the associated crankcase portions. The drain openings located at the collecting regions can be located directly under primary oil entry points of the crankcase portions, but this relationship is not absolutely necessary as long as the drain openings are placed at the collecting regions or, alternatively stated, as long as the drain openings are placed at locations where oil will tend to flow from the points of primary oil entry into the crankcase portions.

Abstract: A portable, operator-carried power tool having an implement supported on an operator-carried frame, and a lightweight, four-stroke, internal combustion engine drivably connected to the implement and supported by the frame. The engine has a crankshaft situated in a crankshaft housing and a cylinder block secured to the crankshaft housing, the crankshaft being provided with a crankcase ventilation passage extending between the crankcase and an outlet end in communication with an air/fuel induction passage. A passage establishes communication between the interior of the crankcase and the valve chamber through a cam and cam gear region of the cylinder block. An oil mist generator is connected drivably to the crankshaft for agitating liquid oil in the crankcase to establish a lubricating oil mist. The crankcase, the cam region and the valve chamber form a closed oil mist containment whereby lubricating oil mist is distributed throughout the engine during operation regardless of angular orientation of the engine.

Abstract: A coolant supply apparatus for a linear compressor which includes a stator mounted at one side of a flange for generating a magnetic field therearound and a horizontal operating unit which reciprocates horizontally. The horizontal operating unit includes a magnet disposed inside the stator and a piston, which is integral with the magnet and reciprocates horizontally within a cylinder. The coolant supply apparatus further includes a coolant oil pocket for guiding a predetermined amount of coolant oil to an outer circumferential surface of the cylinder in cooperation with a suction force of the piston and for cooling a heat generated in the cylinder. A plurality of coolant oil sucking/discharging holes are formed at the cylinder in order for the coolant oil filled in the coolant oil pocket to be introduced between the cylinder and the piston therethrough.

Abstract: An improved oil supply apparatus for a friction portion of a linear compressor which is capable of enhancing the lubricating performance of the piston by substantially supplying oil to the fricton portion between a cylinder (122') and a piston (129), thus enabling a desired reciprocating movement of the piston (129), which includes a cylinder (122') having a plurality of oil introducing holes (122a) for communicating the inside and the outside of the cylinder (122'); an oil mass (131) disposed between the cylinder and a core liner spaced apart from the cylinder (122') and slidable whithin an oil pocket (132) communicating with the cylinder (122') by an oil suction hole (143c); an elastic member (133, 134) for elastically supporting the oil mass (131); and a valve assembly (139') for a refrigerant gas flowing path for guiding the flowing of the refrigerant gas, a suction gasket (141) integral with an oil flowing path for guiding the flowing of the oil supplied to and discharged from the friction portion betwee

Abstract: An oil lubrication system for a marine outboard motor including an internal combustion engine. The oil lubrication system includes a series of oil passageways within the cylinder block of the internal combustion engine. The oil passageways are configured such that each cylinder in the internal combustion engine is supplied by its own oil passageway. Each of the oil passageways terminate in an outlet opening. The outlet opening is positioned within the cylinder block such that oil exiting the outlet opening is directed by the force of gravity into contact with a moving component of the internal combustion engine. As the internal components of the internal combustion engine move, oil contacting the components is physically distributed into contact with the bearings.

Abstract: An internal-combustion engine, particularly for a motor vehicle, is provided with an oil pan. Oil ducts are molded into the housing of the oil pan. An oil filter housing with an oil filter and an oil pump is integrated in the oil pan. Together with the oil filter and the oil pump, the oil pan can be mounted and/or demounted as a unit to the internal-combustion engine.

Abstract: An internal combustion engine includes separated oil drain-back and crankcase ventilation passages. The oil drain-back passages extend from the cylinder head to a position below the top level of oil in the engine's crankcase. The crankcase ventilation passages extend from passages formed in the main bearing bulkheads from positions above the oil level in the crankcase and ultimately through the cylinder head. Oil dams surrounding the uppermost portions of the crankcase ventilation passages prevent oil from running downwardly through the crankcase ventilation passages.

Abstract: A crankcase compression four-cycle internal combustion engine having a valve actuating mechanism that is lubricated by first four-cycle type lubricating system. A second two-cycle lubricating system is provided for lubricating the crankcase and components associated therewith. The second lubricating system also delivers lubricant to the piston and piston pin through a groove passage way formed in part in the connecting rod for their lubrication.

Abstract: A lubricating system for a machine such as a two-cycle internal combustion engine including a reciprocating pump that pumps a finite amount of lubricant during a single pumping stroke and a stepper motor for operating the pump through incremental phases of movement each less than a stroke. The lubricant requirements of the machine are determined and the driving increments are adjusted so as to provide a pumping stroke when the lubricant consumption of the machine reaches the output of the pump. Various arrangements of stepper motors and control arrangements are disclosed for controlling the amount and timing of the lubricate delivery.

Abstract: A process and an assembly for supplying a liquid lubricant to points of a reciprocating piston engine which are to be lubricated and which include at least running surfaces of a piston-cylinder tube unit of the reciprocating piston engine. The reciprocating piston engine has a piston and a cylinder. According to the process, the lubricant in at least one conditioning device is united with a gaseous transport medium. In the conditioning device, a lubricating mixture is formed including small liquid particles of lubricant carried by the gaseous transport medium. At least one of the lubricating mixture and the lubricant is passed with the gaseous transport medium through a plurality of supply ducts corresponding to the points to be lubricated. The gaseous transport medium and excess lubricant are drawn away through at least one drain disposed in a region of the points to be lubricated.

Abstract: A control unit for circulating lubricating oil to vehicle engine parts comprising an oil tank for collecting lubricating oil; a hydraulic circuit which directs the lubricating oil to the appropriate parts and returns the lubricating oil to the oil tank; an oil pump provided in the hydraulic circuit for circulating the lubricating oil therein; at least one sub-oil tank which can contain an appropriate amount of lubricating oil; at least one hydraulic pipe which connects the sub-oil tank with the hydraulic circuit; and an oil pump which transfers, via the hydraulic pipe, lubricating oil from the sub-oil tank to the hydraulic circuit and from the hydraulic circuit to the sub-oil tank. The unit may also have a cooling bypass for diverting the lubricating oil from the hydraulic circuit to oil cooling means and means for regulating the amount of oil circulated in the hydraulic circuit and in the cooling bypass.

Abstract: A single horizontal cylinder, small refrigeration compressor has a lubrication arrangement which includes a recess on the cylinder block above the cylinder bore which collects oil that drains from the lower end of the motor. A supply passage extends downward from said recess and opens into the cylinder bore near its midpoint. The piston has an elongated shallow groove on the interior between head and skirt lands which is connected to the passage during a major portion of the piston stroke to receive oil from the recess. Drain passage means are provided on the piston to allow oil to flow out of the groove at a lesser rate than it is supplied by the supply passage from the recess.

Abstract: The present invention is an improved lubrication system for a connecting rod, wrist pin, and piston of a compressor. An oil pump pumps lubricating oil upwardly within an axial bore of the crankshaft, which includes a radial passageway in alignment with the connecting rod. The connecting rod includes ports which direct pulses of oil onto the inner surfaces of the piston. The ports are separated by barrier segments to allow local oil pressure to build between the sequential alignments of the passageway and a port. Thus, pulses of oil are accurately sprayed onto the piston inner surfaces without substantially diminishing the lubrication of the journal bearings.

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 system is provided at a junction of relatively rotatable members of an engine in an environment where oil comes into contact with the external surface of the rotatable members. The junction includes a relatively rotatable member provided with a bore and pin extending through the bore. The pin is snugly received in the bore so that rotation between the pin and relatively rotatable member may occur. An example of such a system is provided by the wrist pin connection to a piston. According to the invention, within the bore are recesses spaced inwardly and separated from both ends of the bore and arranged diametrically opposed to each other on a line transverse to the principal linear movement of the wrist pin. A pocket for oil is provided by each of the recesses between the bore of the rotatable member and the pin for accumulation of oil to lubricate between the surfaces of the pin and bore.

Abstract: A fuel, lubricant supply system for a carburetor of a two-cycle internal combustion engine wherein both fuel and lubricant are delivered to the fuel bowl of the carburetor. The amount of lubricant delivered is proportioned in response to the air flow through the carburetor and the amount of fuel delivered is controlled in response to the output pressure if the lubricant pump for preventing the operation of the engine with insufficient lubricant. In one embodiment, the air flow is sensed by sensing static pressure at the throat of the venturi of the carburetor and in the other embodiment, the air flow is sensing dynamic air pressure at the inlet to the carburetor.

Abstract: For the distribution of lubricating oil, a duct is arranged in the crankcase 13 of a piston-operated internal-combustion engine and extends through several transverse walls 11, 12. The sections of the duct between two transverse walls 11, 12 are composed of an insert pipe 23 and of a socket pipe 24 which are constructed to be axially slidable and clampable with respect to one another. The free ends of the insert pipe 23 and of the socket pipe 24, in a sealed manner, extend in the bored transverse-wall passages 14, 15 of the duct. The arrangement results in a simplified tooling of the crankcase 13 in the area of the duct.

Abstract: A lubricating system is disclosed which includes a splash cooling of the pistons of an internal-combustion engine by spraying nozzles, the cooling jets of which are aimed at the interior surfaces of the pistons. In order to achieve, after the start of an internal-combustion engine, a rapid buildup of the lubricant pressure, the lubricant supply to the spraying nozzles is interrupted in this initial operating phase. Since, in the starting phase, the lubricating oil supply to the camshafts can be reduced considerably or can even be switched off completely without damaging the bearings, the spraying nozzles and the camshafts receive a common lubricating oil supply which can be controlled centrally by means of control valves. It is advantageous that already existing lubricant ducts may be used, and the spraying nozzles can be constructed in a simple manner without any integrated control valves.

Abstract: An apparatus for automatic lubrication of bearings which apparatus incorporates a feeding device (2, 3) for grease and a valve member (7) intended to be connected to a bearing housing. In the valve member (4) is provided at a heat activated member (5) for sensing the bearing housing temperature and which, when a predetermined activation temperature is exceeded, is arranged to expand and to cause a restriction of the lubricant feed.

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 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 fuel-injection pump with a rotational speed governor for an internal combustion engine which for purposes of lubrication is connected to the lubricating oil circulatory system of the internal combustion engine. The lubricating oil which is thereby removed from the lubricating oil circulation is conducted by way of a pressure oil line and an inlet bore in the pump housing to a plunger cylinder of the injection pump and is controlled by the plunger sliding within the plunger cylinder by way of an aperture into a discharge bore terminating in the governor housing. From the governor housing, the lubricating oil flows over into the cam shaft space and is returned from the same by way of a return opening to the lubricating oil circulation of the internal combustion engine.

Abstract: A pump supplies pressurized lubricant to an internal combustion engine from an external reservoir through a closed loop system. Delivery channels extending through the crankshaft, connecting rod and other components, supply the pressurized lubricant to the several areas of relative movement. Return channels, extending through the components, conduct lubricant from the several areas to the reservoir. Fuel-air mixture from a carburetor enters the crankcase through the open end of the crankshaft and moves through ports within the several cylinders to the respective combustion chambers. Selected ports are sequentially closed by a valve plate carried by the crankshaft. Incomplete products of combustion are exhausted into an auxiliary exhaust outlet for recycling with the fuel-air mixture. Retainer members engaging the spark plugs assist in dissipating heat therefrom.

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 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: In the engine the side wall of the piston is provided with a perforation at a portion not facing an exhaust port of the cylinder for communicating the cylinder wall with the crankcase chamber.

Abstract: An internal combustion, reciprocating-piston engine which includes a sealed crankcase for inducting and compressing air or an air-fuel mixture into the engine. The compressed gas is then forced into a holding tank for subsequent induction into the cylinder combustion chamber. This pre-compresses or "supercharges" the fuel mixture before compression by the piston. An enclosed lift tube within the connecting rod is provided for conveying lubricating oil through the crankcase to the cylinder walls.