Abstract: A DOHC engine comprises a cylinder block, and a chain which drivingly interconnects a crankshaft and two camshafts. A water pump mounting lug is integrally formed with the cylinder block, and located at the upper portion of a front wall of the cylinder block and below one of the two camshafts. The chain has a loose side defined by that portion thereof which runs between the crankshaft and the one of the camshafts. A movable chain guide bows the loose side of the chain inwardly to define a mounting site of a water pump.

Abstract: There is provided for use in a reciprocating engine, a motive flow pump to provide a constant suction pressure in order to draw oil from a breather oil recovery device back to the engine oil reservoir. The motive power for this pump is provided from the flow of oil from a different source.

Abstract: In an oil free mechanical pump of the type in which two shafts support at least one pair of intermeshing rotors for rotation in opposite angular directions, a flexible drive means in the form of the belt or chain is provided for engaging pulleys or sprockets on the shafts.

Abstract: A fuel pump is mounted on an engine to reduce heat transmission therefrom by a construction in which the housing of the fuel pump is formed at its base with an annular flange with a relatively small diameter which rests on the engine around on opening therein for the operating rod of the fuel pump. The housing of the pump is secured to the engine by a holder which has a shelf bearing on the flange and which includes a depending perimetral flange secured on the engine by a bolt at the distal end of the holder.

Abstract: A water pump apparatus in an integral combustion engine of a water cooling type having a driving pulley fixed to one end of a crankshaft, and a driven pulley fixed to one end of a valve camshaft for driving the movable valve camshaft from the crankshaft via a timing belt has a water pump eccentrically providing a pump shaft axis relative to the valve camshaft axis, a pair of drive and driven gears provided with a suitable rotational ratio and respectively mounted on an end of the valve camshaft and one end of the pump shaft and engaged with each other, and a sliding bearing supporting the pump shaft and being inserted in a cylinder head.

Abstract: Several embodiments of outboard motors having fuel injected internal combustion engines. In each embodiment, the fuel injection pump is disposed so that its drive shaft extends horizontally and so that its outlets for pressurized fuel are below its top end to avoid the inclusion of air in the fuel. In each embodiment, the fuel injection pump has an air vent that is vented back to a remotely positioned fuel tank.

Abstract: The invention is directed to a membrane fuel pump for an internal combustion engine equipped with a membrane carburetor. The engine is that of a working apparatus and especially a handheld portable tool such as a motor-driven chain saw or the like. The membrane pump includes a drive chamber charged with the pressure inside the crankcase of the engine and a pump chamber separated from the drive chamber by a membrane. The pump chamber is connected at its suction end to a fuel tank via a first check valve and is connected to a pressure controller of the membrane carburetor at its pressure end via a second check valve. The pressure end of the membrane pump is connected with the suction end thereof via a bypass and a throttle is mounted in this bypass. With the throttle bypass between the pressure end and the suction end, the pumped volume is reduced at idle and the pump pressure is smoothed. Disturbances at the membrane carburetor are avoided.

Abstract: A rotor type oil pump is arranged about a leading end of a crankshaft having an annular external gear of the pump concentrically disposed about the leading end. An oil pump driving mechanism is proposed, which comprises a cylindrical portion integrally defined by the leading end of the crankshaft, the cylindrical portion having the same diameter throughout the axial length thereof; and a tubular spacer member coaxially disposed on and splined to the cylindrical portion to rotate therewith, the tubular spacer member having such an external shape as to be latchingly engageable with the annular input member of the oil pump.

Abstract: A lubricating arrangement attached end face at the engine housing of a reciprocating piston engine is surrounded by an oil pump housing which is composed of two housing parts cast of magnesium. The oil pumps are preassemblable in the oil pump housing. The couplings of the oil pumps and the lubricating connections are so constructed that the oil pump housing is easily assemblable at the engine housing as a structural unit.

Abstract: An oil pump cover is provided which converts a standard Volkswagen type air-cooled engine into a full flow oil system for the installation of auxiliary oil filters and coolers by merely replacing the standard oil pump cover with the cover of the present invention. The cover includes a baffle for segregating a discharge chamber of the oil pump into a first (outlet) compartment and a second (return inlet) compartment. The cover includes an outlet recess for communicating with the first compartment and has an outlet passage extending from the outlet recess to the exterior of the cover, forming an outlet. The cover further includes an oil return inlet recess for communicating with the second compartment and has a passage extending from the inlet recess to the exterior of the cover forming a return inlet. The auxiliary oil filter or cooler is installed at a remote location on a vehicle and is connected by suitable hoses to the inlet and outlet of the oil pump cover.

Abstract: The present invention pertains to a vehicle having an internal combustion engine. The internal combustion engine has a first plurality of movable parts which require lubrication during relative movement to reduce wear. The vehicle has N systems, each of which has a corresponding plurality of movable parts which require lubrication during relative movement of reduce wear. There is also an electrical mechanical starter mechanism for initiating movement within the engine. In addition there is a first oil supply system having a main engine oil pump which circulates oil to the first plurality of moveable parts and responds to movement within the engine. Also a supplemental engine oil pump communicates with the first oil supply system. The vehicle also has N oil supply systems. Each of the N oil supply systems have a corresponding main oil pump which circulates oil to the corresponding plurality of moveable parts in response to movement within the corresponding system.

Abstract: An oil pump for an internal combustion engine includes an annular boss on a front cover of the engine, a counterbore in the front cover behind the boss, crankshaft driven oil pump elements in the counterbore, and a planar closure plate attached to the front cover over the counterbore and capturing the pump elements. The closure plate has a pair of raised protuberances thereon which span the chain drive chamber of the engine behind the front cover and which straddle the chain within the chamber, each of the protuberances having a flat wall around respective ones of a pair of ports in the closure plate. One of the ports is connected to the pump intake and the other is connected to the pump discharge. A pair of face seal assemblies on the cylinder block of the engine around low and high pressure galleries engage the flat walls of the protuberances when the front cover is installed on the cylinder block and define fluid seals around the ports.

Abstract: The invention provides an oil pump as a replacement for the conventional piston type oil pumps used in Triumph motor cycles. The pump of the invention comprises a plurality of plates with a feed pump section between a pair of plates and a scavenge section between another pair of plates. Appropriate bores and galleries are provided between the plates for the pumping of the oil. The pumping sections are formed by rotary lobed pump members.

Abstract: A marine propulsion device comprising a propulsion unit adapted to be mounted on the transom of a boat for pivotal movement relative to the transom about a steering axis, the propulsion unit including a rotatably mounted propeller, and an engine drivingly connected to the propeller and including a water jacket, a water pump connected to the water jacket for forcing cooling water through the water jacket to cool the engine, a fluid pump driven by the engine, a conduit communicating between the water jacket and the atmosphere, and a fluid cooler communicating with the conduit to receive cooling water from the water jacket and communicating with the fluid pump for cooling the fluid pumped thereby.

Abstract: The vacuum tank is connected to an engine intake manifold, and a vacuum pump generates compulsarily a negative pressure so as to maintain the negative pressure at a predetermined setting pressure value. The vacuum pump has a diaphragm pump for discharging air in the vacuum tank a motor for driving the diaphragm pump. The vacuum tank pump is disposed in the vacuum tank. A vacuum switch assembly and the diaphragm pump are disposed on the vacuum tank. The motor is installed entirely in the vacuum tank. The volume of a negative pressure supply apparatus can be reduced, and the installing location of the negative pressure supply apparatus can be disposed at liberty.

Abstract: Several embodiments of fuel injection systems for internal combustion engines wherein certain components of the engine are lubricated directly by lubricant supplied by a lubricant pump and the lubricant pump also supplies lubricant to a fuel injection pump. In some embodiments, the fuel delivered to the injection pump is mixed with the fuel pumped by the injection pump for delivery to the engine through an injection nozzle.

Abstract: A lubricating system for an engine comprises an oil pan for storing a lubricating oil therein, an oil cooler for cooling the lubricating oil, and an oil pump including first and second pump rotors contained in a casing. The oil pump is provided with a suction port commonly used for both the pump rotors, a first discharge port exclusively used for the first pump rotor and a second discharge port exclusively used for the second pump rotor. The suction port is in communication with the subsurface of the oil in the oil pan, the first discharge port communicating with an inlet port of the oil cooler, and said second discharge port communicating with the to-be-lubricated portions of an engine.

Abstract: Several embodiments of fuel injection systems for internal combustion engines wherein certain components of the engine are lubricated directly by lubricant supplied by a lubricant pump and the lubricant pump also supplies lubricant to a fuel injection pump. In some embodiments, the fuel delivered to the injection pump is mixed with the fuel pumped by the injection pump for delivery to the engine through an injection nozzle.

Abstract: A marine propulsion device comprising a propulsion unit adapted to be mounted on the transom of a boat for pivotal movement relative to the transom about a steering axis, the propulsion unit including a rotatably mounted propeller, and an engine drivingly connected to the propeller and including a water jacket, a water pump connected to the water jacket for forcing cooling water through the water jacket to cool the engine, a fluid pump driven by the engine, a conduit communicating between the water jacket and the atmosphere, and a fluid cooler communicating with the conduit to receive cooling water from the water jacket and communicating with the fluid pump for cooling the fluid pumped thereby.

Abstract: A lubrication system for a vertical shaft engine includes a crank case having an upper and a lower wall, a vertical crank shaft, a vertical balancing shaft, each pair of upper and lower bosses formed in said upper and lower walls for rotatably supporting these shafts an oil pump having a drive shaft housed in a lower boss for supporting said balancing shaft, and adopted to be driven by said balancing shaft, and an oil feeding passage for feeding lubricating oil from said pump to any part desired to be lubricated in said engine.

Abstract: An internal combustion engine is provided with a lubricating system and a full flow oil filtering circuit arranged in parallel with the main oil lubricating circuit of the engine. The lubricating system includes drive means an oil lubricating circuit for lubricating the drive means, an oil sump connected in flow communication with the lubricating system and an oil pump connected in flow communication with the sump and a lubricating system and operably driven by the drive means for pumping oil from the sump through the lubricating circuit and back to the sump. The parallel flow oil filtering circuit includes an oil filter disposed adjacent the oil sump and connected in flow communication therewith. An oil pump is disposed adjacent the sump and connected in flow communication with the sump and the oil filtering means. The oil pump is driven by engagement with the governor gear.

Abstract: A water pump system for the cooling system of a internal combustion engine wherein the water pump is directly connected to and driven by the engine cam shaft. The water pump shaft is in axial alignment with and coupled to the cam shaft.

Abstract: An internal combustion engine is provided with a lubricating system and a full flow oil filtering circuit arranged in parallel with the main oil lubricating circuit of the engine. The lubricating system includes drive means an oil lubricating circuit for lubricating the drive means, an oil sump connected in flow communication with the lubricating system and an oil pump connected in flow communication with the sump and a lubricating system and operably driven by the drive means for pumping oil from the sump through the lubricating circuit and back to the sump. The parallel flow oil filtering circuit includes an oil filter disposed adjacent the oil sump and connected in flow communication therewith. An oil pump is disposed adjacent the sump and connected in flow communication with the sump and the oil filtering means. The oil pump is driven by engagement with the governor gear.

Abstract: A lubrication system for internal-combustion engines having a mechanical-type oil pump and turbocharger. The system includes an auxiliary electrically operated oil pump, a first time-delay relay connected to the ignition system to energize the electrically operated oil pump for a first time period after the ignition is turned on to prelubricate the engine, and a second time-delay relay to energize the electrically operated pump for a second period after the ignition is turned off to lubricate the turbocharger.

Abstract: A lubricating oil pump for a four-stroke internal combustion engine inclu a pump body; an annular gearwheel rotatably mounted around the outer perihery of the pump body, the annular gearwheel including projections on its outer surface to function as cams for valve control and including teeth on its inner surface; and a driving pinion mounted within the annular gearwheel and attachable to the crankshaft of the engine, the driving pinion including external teeth in meshing engagement with the internal teeth of the annular gearwheel such that the annular gearwheel rotates at half the speed of the driving pinion.

Abstract: An improved, compact auxiliary mechanism driving device in a V-type, overhead-camshaft engine in which a driving section for engine auxiliary mechanism is mounted on a camshaft without increasing the overall size of the engine by utilizing a vacant or unused space(s) on the camshafts peculiar to such an overhead-camshaft engine. A pair of first and second cylinder banks are arranged in V-shape and have a first and a second cylinder head, respectively. The cylinders of the first bank are displaced from the cylinders of the second bank in the axial direction of the camshaft. A first camshaft having first valve-operating cams for the first cylinders is provided on the first cylinder head of the first cylinders. A second camshaft having second valve-operating cams for the second cylinders is provided on the second cylinder head of the second cylinders.

Abstract: A tandem pump arrangement is disclosed comprising a first pump having two meshing gears of different pitch diameter adapted to produce pumping action by their meshing engagement upon drive to the one gear having the larger pitch diameter and the drive thereby of the other gear having the smaller pitch diameter at a higher speed. A second pump has an input connected to be driven by the gear with the smaller pitch diameter with the result that the second pump is driven through the first pump at increased speed with an overdrive ratio determined by the ratio of the pitch diameters of the gears.

Abstract: A internal combustion engine lubrication pump assembly (95) having a mounting frame (104) which is received by an aperture (104a) in a gear plate (10) and driven by a radial gear (22)of the engine accessory gear train and further including a method and apparatus for precisely positioning the gear plate (10) on the block (12) of the engine accessory drive gear train (22, 24, 26, 28, 30, 32, 34 and 36) whereby the precise positioning of the gear plate (10) results in the precise alignment of the gears mounted thereon. The present invention achieves this result by utilizing the shafts (56 and 58) of two of the gears (34 and 36) in the gear train as primary and secondary positioning means.

Abstract: Silencer apparatus for an internal combustion engine including an intake manifold, the apparatus comprising an air silencer having a lower end including a sump, and a conduit extending upwardly from the sump to the intake manifold for purging the sump of fluid only when the engine is operating.

Abstract: A fluid pumping arrangement including a fluid pump including a suction port, and a fluid pumping device comprising a pump housing defining a recess, and a moveable wall which is located in the recess and which cooperates with the recess to define a variable volume pumping chamber. The pumping device also includes a fluid inlet communicable with the fluid pumping chamber and adapted to communicate with a source of fluid, a fluid outlet communicable with the fluid pumping chamber and communicating with the suction port, and an arrangement for effecting reciprocating movement of the moveable wall in response to alternate communication of the fluid pumping chamber with the fluid outlet and with the fluid inlet.

Abstract: A four cycle internal combustion engine including a secondary intake system. The secondary intake system includes a pumping diaphragm actuated by pressure variation within the engine crankcase. The pumping diaphragm is in turn connected to the intake passage through a secondary intake passage to receive and expel air/fuel mixture toward the intake valving at appropriate intervals. A control valve control communication between the crankcase and the pumping diaphragm to restrict or allow actuation of the pumping diaphragm. An outlet also extends from the system to vent the crankcase at appropriate intervals.

Abstract: A system for ensuring that hydraulic valves are in an unactuated position during starting of an engine. An ignition switch, when suitably positioned, delivers a starting signal to a starting motor operationally coupled to the vehicle engine. A relay system responsive to the starting signal energizes a solenoid structure which permits the valves to move to their unactuated positions or, alternatively, a relay which obstructs the starting signal to the starting motor in response to a signal from a switch network indicating at least one valve is in an actuated position.

Abstract: Disclosed herein is a combined fuel and oil pump comprising a reciprocally movable member for pumping fuel in response to member reciprocation, a reciprocally movable element for pumping oil in response to element reciprocation, and a fluid pressure actuated motor connected to the member and to the element and responsive to a source of alternating relatively high and low pressures for effecting reciprocation of the member and the element at a frequency less than the frequency of the alternation of the relatively high and low pressures.

Abstract: To provide for accurate alignment of a housing (10) retaining a fuel injection element (12, 15), and a second housing (23) retaining a control element controlling a function of the fuel injection element, in which the relative positions of the pump housing (10) and of the control element housing (23) are determinative of adjustment and alignment of interengagement between the injection element and the control element, the two housings are provided with attachment screws to attach them securely together, while permitting respective removal, for example for replacement of a sealing gasket (26), and to insure precisely aligned re-assembly, the housings include position locating means (27-34, 35') such as interengaging projection-and-recess means (40, 50, 60, 70, 80, 90, 100, 110; 37, 47, 57, 67, 77, 87, 97, 107) which accurately position the housings with respect to each other, and which are positionable after the housings have been first assembled and aligned to provide for said adjusted and aligned interengage

Abstract: An over ride oil pump for use with reciprocating or rotary engines which provides auxiliary oil pumping under three circumstances by use of an electrically operated oil pump, digital circuitry and sensors. As a car is started the standard mechanical oil pump cannot provide adequate lubrication since the mechanical pump can only pump at a rate proportional to engine speed. The over ride pump begins immediately, upon initiation of engine start up. Under conditions of high RPM operation extra lubrication is required. The over ride oil pump senses increased vacuum levels and provides additional oil delivery. Oil pressure drops rapidly if there is a failure in the mechanical pump drive mechanism or the pump itself. The over ride oil pump senses this deficiency and provided the necessary oil delivery.

Abstract: An auxiliary device, for example a water pump, is arranged on a housing wall of an internal combustion engine in such a way that the device is mountable in a simple manner. For this purpose, a drive gear with a pin transversely penetrating a drive shaft is tightened, from one side, and the pump wheel, attached in the drive shaft by means of a screw, is tightened from the other side against the inner race of a ball bearing, the outer race of which is fixed in the housing wall of the internal combustion engine.

Abstract: In combination with an internal combustion engine having a crankcase in which an air/oil mist mixture exists during normal operation of the engine, a pump having a crankshaft journalled in a crankcase, a cylinder, a piston coupled to said crankshaft to reciprocate in the cylinder, an intake and a return passage each communicating the pump crankcase with said engine compartment, and one-way valves in each of said passages arranged so that reciprocation of the pump piston will circulate the air/oil mist mixture from the engine compartment through the pump crankcase to provide lubrication to the compressor crankshaft and piston.

Abstract: A reciprocating, preferably a piston-type, exhauster adapted for mounting on an engine crankcase and having, on opposite sides of the piston, a high clearance volume inlet chamber and a low clearance volume exhaust chamber. The piston is operated by an engine driven cam acting on the piston rod which passes through the exhaust chamber and moves against a return spring in the inlet chamber. As the piston moves in the cylinder air is drawn from the inlet chamber through a non-return valve in the piston to the exhaust chamber and then is discharged directly into the engine crankcase.

Abstract: A vacuum pump directly driven by a starting motor of an engine which can operate with a constant number of rotations even while the engine is running. The starting motor is shut off when the engine has reached a predetermined speed and then restarted to drive the pump in response to the vacuum in the vacuum tank or pressure accumulating portion of the master bag.

Abstract: A gear drive for driving accessories such as an oil pump for a two-cycle engine (10) includes a worm member (25) mounted on the crankshaft (14) of the engine. The worm member (25), formed of a low friction plastic material such as nylon impregnated with molybdenum disulfide, engages a worm gear (24) mounted on the engine (10) to drive the oil pump (21).

Abstract: A machine has two cylinders with respective pistons slidably supported therein, and has two crankshafts carrying counterweights operatively coupled to the respective pistons. A balance shaft carrying a balance weight is associated with and extends parallel to each crankshaft. The cylinders, crankshafts and balance shafts are parallel to and arranged in mirror-image fashion on opposite sides of a plane of symmetry. The crankshafts rotate synchronously in opposite directions, and each balance shaft rotates in an opposite direction from and at twice the speed of the associated crankshaft. In one embodiment the machine is an internal combustion engine and fuel is supplied to the cylinders through an eddy chamber which communicates with both cylinders through respective ducts. Two machines of the above type, an internal combustion engine and a compressor, can be operationally coupled, each crankshaft and balance shaft of the engine directly driving a respective crankshaft or balance shaft of the compressor.

Abstract: A control unit for the lubricating oil circulation pump and for the fuel injection system regulator of diesel engines, comprising a shaft extending through the cylinder block from the oil sump to said regulator, which is mounted externally, said shaft being operationally connected at an intermediate point thereof to the engine cam shaft, and at its opposing ends to the power take-offs of said circulating pump and regulator respectively.

Abstract: A booster pump for a secondary fuel circulation system of a diesel engine adapted to be connected with the fuel pump of the primary circulation system by removing a screw plug associated with a piston chamber of the fuel pump in order to permit the booster pump to be threadedly engaged in place thereof by means of a threaded member formed on the housing of the booster pump. A spring actuated piston of the booster pump is thus brought into active connection with a piston of the fuel pump by way of a plunger protruding from the housing of the booster pump.

Abstract: An internal combustion engine of a motorcycle includes an oil filter fixed to a rear portion of a crank case. The crank case accommodates therein an oil pump connected to the oil filter. The oil filter is detachably provided by means of threading engagement with the crank case.

Abstract: Disclosed is an apparatus for arranging an oil pressure pump in a motor-cycle equipped with an engine consisting of front and rear engine blocks that project to the right and left from a car frame and are deviated from each other in the longitudinal direction of the car frame. The oil pressure pump is disposed at the rear of the front engine block which is curved forward with respect to the frame.

Abstract: A vacuum pump is attached to a front side of an alternator, that is, between a driven pulley and the alternator, wherein a pump shaft is detachably coupled to an alternator shaft through a tubular bushing shaft. A seal member is disposed in the tubular bushing shaft for preventing leakage of lubricating oil from the pump to brushes arranged at a rear side of the alternator.

Abstract: Method and apparatus for precisely positioning a gear plate (10) on the block (12) of an internal combustion engine equipped with an accessory drive gear train (22, 24, 26, 28, 30, 32, 34 and 36) are disclosed whereby the precise positioning of the gear plate (10) results in the precise alignment of the gears mounted thereon. The present invention achieves this result by utilizing the shafts (56 and 58) of two of the gears (34 and 36) in the gear train as primary and secondary positioning means. Primary and secondary positioning bores (66) are formed in the engine block (12) and in the gear plate (10) and the primary and secondary gear shafts (60) inserted therein to position the gear plate (10) first at a point along a first axis relative to the engine block (12) and secondly at a point along a second axis relative to the engine block (12).

Abstract: An internal combustion engine comprises a cylinder head (1), a camshaft (2) mounted thereon, a rocker cover (4) and a rotary vacuum pump (10) mounted on the cylinder head (1) within the rocker cover (4) and driven by the camshaft (2), providing compact packaging and low noise levels. The vacuum pump is lubricated from the camshaft via the pump exhaust port (30) discharging air into the rocker cover.

Abstract: A V-type internal combustion engine has a timing gear mechanism positioned in front of the cylinder block for driving the camshaft from the crankshaft. A coolant pump is secured to the cylinder block laterally offset from the crankshaft and adjacent one bank of cylinders. A first discharge passage leads from the coolant pump to the adjacent bank of cylinders and the second discharge passage is formed on a cover for the timing gear mechanism for supplying coolant to the remote bank of cylinders.

Abstract: A fluid pumping arrangement including a fluid pump including a suction port, and a fluid pumping device comprising a pump housing defining a recess, and a moveable wall which is located in the recess and which cooperates with the recess to define a variable volume pumping chamber. The pumping device also includes a fluid inlet communicable with the fluid pumping chamber and adapted to communicate with a source of fluid, a fluid outlet communicable with the fluid pumping chamber and communicating with the suction port, and an arrangement for effecting reciprocating movement of the moveable wall in response to alternate communication of the fluid pumping chamber with the fluid outlet and with the fluid inlet.