Abstract: Disclosed herein is an internal combustion engine comprising a carburetor having an air induction passage, a valve member located in the air induction passage and moveable between open and closed positions, and a fuel supply valve member moveable between open and closed positions, an air intake silencer communicating with the air induction passage and including spaced exterior brackets including aligned openings, an actuating member received in and support by the aligned openings for rotary and axial movement relative thereto, connected to one of the valve members for actuation of the one member between the open and closed positions in response to axial movement of the actuating member, and connected to the other of the valve members for actuation of the other member between the open and closed positions in response to rotary movement of the actuating member.

Abstract: A cover for use on the forward, timing chain, end of a number of different model multi-cylinder, automotive vehicle type internal combustion engines is formed of an integral cast metal dish-like shape having a forward wall and a surrounding edge wall which define a cavity. The edge wall is shaped to engage and mount upon the forward end of an engine to cover the timing chain and the engine crankshaft extends through a seal mounted within a hole in the wall, with the seal being located upon the exterior of the cover wall for removal without removing the cover. A fuel pump mounting opening, which may be blocked by a removable plate, is formed in the cover edge wall so that a fuel pump may be optionally mounted within the cover by removing the plate. A distributor mechanism receiving opening is formed in the upper end portion of the cover edge wall and alternative screw receiving holes formed in the cover permit mounting different, preselected distributor mechanisms therein.

Abstract: A generally rectangular, flat gasket for use in sealing oil pan covers. The gasket has a main body with a rigid core and facing layers. The ends of the main body have a greater thickness than that of the main body. The gasket may be shipped in a flat condition, but is bendable in the zones of the ends to form arched ends for sealing purposes. A method of making such a gasket is also disclosed.

Abstract: A crankcase filter assembly for filtering air in a crankcase ventilation system. The crankcase filter assembly (71) includes a crankcase filter housing disposed in an air cleaner assembly. The crankcase filter housing defines an opening in fluid communication with the air cleaner assembly and includes a first air inlet or drain hole spaced from opening and an air outlet in fluid communication with an engine crankcase. A filter cartridge supports first and second filters within the crankcase filter housing in respective first and second filter positions establishing a filter spacing therebetween. The filter cartridge interconnects the first and second filters for allowing their insertion and removable from the crankcase filter housing as a single unitary cartridge structure while maintaining the filter spacing between the first and second filters.

Abstract: A two wheel motorcycle of the scooter type employing a power unit with an engine mounted forwardly of the rear wheel, a power train extending rearwardly on one side of the rear wheel to couple the engine and the rear wheel and a muffler extending along the other side of the rear wheel. A carburetor is mounted above the power train and an air cleaner for that carburetor is mounted above the muffler. A connecting tube extends transversely of the vehicle between the air cleaner and the carburetor at a lcoation above and forwardly of the axis of the rear wheel.

Abstract: The invention relates to a mounting arrangement for a fuel tank and shroud unit on an internal combustion engine. The plastic shroud unit includes a fuel tank and outer walls extending around the crankcase. The shroud unit is clamped to the crankcase by two springs disposed on opposite sides of the crankcase. In addition, the shroud unit and crankcase have complementary mounting surfaces for supporting the shroud unit on the crankcase.

Abstract: An internal combustion engine has a casing which includes interconnected elements and is connected to an engine housing with interposed vibration-damping means. The engine also has a cooling air blower driven by an engine crankshaft which draws in cooling air through an inlet opening in said casing and conveys such cooling air through an interior space between the engine housing and the casing. Exhaust air from such interior space exits through an outlet opening in said casing, the inlet and outlet openings being disposed in a single element of the casing which element is a closed unit at a side of the engine remote from the blower and is equipped with at least one sound-damping layer. The sound-damping layer has casing element passages formed therein which are separate from one another and which communicate said interior space respectively with the inlet and outlet openings.

Abstract: An internal combustion engine is disclosed, which comprises a cylinder block having lubrication oil passages formed therein, the oil passages having a cylinder block opening at one longitudinal end of the cylinder block; a crankshaft operatively installed in the cylinder block, the crankshaft having one end portion exposed to the outside of the cylinder block from the one longitudinal end of the same; and a front cover structure attached to the one longitudinal end of the cylinder block.

Abstract: An air cleaner assembly for a motor vehicle includes a housing which carries a substantially flat valve cover plate which defines a pair of openings. A valve is slidable relative to the valve cover plate through a linkage operated from the vehicle operator's compartment to cover one or the other of the openings in the valve cover plate. During normal operation of the vehicle, combustion air is communicated to the air cleaner housing through the normal air induction system. However, when heavy snow blocks communication through the normal air induction system, the vehicle operator operates the linkage to move the valve to a position opening the other opening into the air cleaner, so that underhood air may be used for combustion as long as the normal air induction system is blocked by snow.

Abstract: A number of embodiments of internal combustion engines incorporating toothed belt driven overhead camshafts. In each embodiment, the driving belt is contained within a protective case that is separated from the engine by an air gap for insulation and a cooling fan driven by the camshaft circulates cooling air through the belt case. All embodiments employ air inlets for the belt case that are disposed in sheltered areas so as to prevent contaminants from being drawn into the belt case. In addition, a generator is contained within the belt case for protection.

Abstract: A portable powered working machine such as a chain saw has a casing, a hollow grip formed integrally with the casing and extending from a front portion to a rear portion of the upper wall of the casing. An internal combustion engine is disposed in the casing such that its crankshaft extends transversely of the casing, the internal combustion engine having a cylinder arranged horizontally in a rear portion of the casing and a crankcase disposed in a front portion of the casing. A carburetor is disposed on a front side of the crankcase, while an air cleaner disposed in a rear portion of the grip. A communication pipe extends through the grip portion in the longitudinal direction thereof and connected between the air cleaner and the carburetor so as to form an air passage.

Abstract: An air cleaner is provided in the air intake system for an internal combustion engine. An air intake port is provided at the inlet to the air cleaner. A suction air passage is provided in the air intake port and has a cross section that gradually decreases along the air flow direction.

Abstract: A sealing cover for a housing is provided with a hole for passage of a shaft which extends through the cover. The cover comprises a metal cover body; a dynamically acting seal for the shaft, the dynamically acting seal comprising at least one elastic sealing lip which is vulcanized to the body; a statically acting seal for sealing the cover flange face, the statically acting seal comprising elastic sealing strips projecting axially with respect to the direction of the shaft which are vulcanized to the body.

Abstract: An air cleaner has a filter, an annular filter holder formed on the peripheral edge of the filter, a flange portion of U-like cross-section to which the outer circumference of the filter holder is embedded, and a case provided with an air inlet port and an air outlet port. This case is molded in blow molding using a filter member constituted integrally by the filter and the filter holder as an insert. In this air cleaner, the constitution parts, become as little as possible.

Abstract: In a system having an electronic controller for internal combustion engines, particularly injection engines in which the controller is functionally connected to a plurality of sensors and at least one actuator, the controller is part of an assembly which furthermore comprises a throttle-valve arrangement, an air-mass sensor and a throttle-valve position sensor. In systems with central injection, the injection valve can also be arranged within the assembly. By the compact structural unit thus obtained, cable connections are reduced to a minimum, so that, in their turn, reliability is increased and expense is saved. Furthermore, the arrangement facilitates maintenance and repair.

Abstract: An off-road vehicle includes an engine mounted on a rear portion of a vehicle frame and a recoil starter for starting the engine. The recoil starter has a pulley operatively coupled to the crankshaft of the engine, and a cord member wound around the pulley. The cord member has an outer end extending rearwardly from the recoil starter for allowing the cord member to be easily pulled from behind the vehicle frame.

Abstract: An insulated prime mover or engine in which a radiant heat retardant material surrounds the engine or engine components throughout normal service life and prevents cooling through radiation. The heat otherwise radiated is absorbed by the coolant for extraction to do useful work. Using insulation makes it possible to maintain the engine near operating temperatures for extended periods of time after engine shut down.

Abstract: An improved motor vehicle engine compartment [10] for protecting the engine from cold by retaining engine heat includes conventional side walls [11,12], hood [13] and cowling [14]. A front wall [16] adjacent the radiator [R] includes a series of movable louvers [22] for covering and uncovering a series of opeings [21]. A lower wall [17] includes a series of movable louvers [24] for covering and uncovering a series of openings [23]. Together these walls and the side walls, hood and cowling form a substantially hermetically sealed enclosure when the louvers are in the covering positions. Actuators [28,29], acting through connecting rods [26,27], move the louvers [22,24] to the covering and uncovering positions. A control circuit [40], responsive to low ambient temperature, high engine temperature and operation of the engine, controls the operation of the actuators [28,29].

Abstract: A power tool comprises a throttle lever pivotally provided at a rear end portion of a handle and extending inside the handle toward a front end portion of the handle; a finger engaging portion formed at the front end portion of the throttle lever in such a manner as to project from the handle to the outside; wherein a rear-end portion of the throttle lever is connected with a throttle valve of the internal combustion engine by means of a connecting member, and, when the throttle valve is at an idling position, the finger engaging portion of the throttle lever is held at a position where the finger engaging portion projects from the handle to the outside.

Abstract: A forced air induction system is provided in an air box of an ATV. A fan is installed in the air box adjacent to an enlarged air inlet. The fan sucks air into the air box and pushes air through the air box and through an air filter to a downstream carburetor. This pressurized air to the carburetor produces a boost in power, acting as a supercharger for the ATV to thereby increase horsepower delivered. The continuous pressurized air flow results in at least a 20% increase in power output by the ATV.

Abstract: Two flat filter elements are disposed in a casing in such a manner that they are inclined to each other and arranged symmetrical with respect to a middle portion of the casing. With this, two dust side chambers are defined in the casing at the lower sides of the filter elements, to which members air inlet openings formed in side walls of the casing are exposed respectively. A cover is disposed on the casing to define at the upper sides of the two filter elements a common clean side chamber to which an air outlet opening formed in the cover is exposed. The cover is formed with two substantially identical air flow passages which independently extend from the respective filter elements to the air outlet opening of the cover.

Abstract: This storage funnel is designed to retain oil or a gasoline mixture for dispensing into an engine or tank, and is also employed to store parts, etc. Primarily, it consists of a housing that serves as a reservoir for the oil or fuel mixture which will be dispensed by the operator through the employment of a rotatable valve in the housing. The funnel housing also includes a cover over the oil or fuel mixture that is pivotal, and a filler neck is included in the cover for filling the reservoir, a cap being provided on the filler neck for closure and which is opened to serve as a vent when the oil or fuel mixture is being dispensed. A second outer cover is also provided to cover articles stored on top of the other cover.

Abstract: A frame and body construction for a small snowmobile comprised of a generally open tubular frame to which a light weight generally inverted cup shape body is detachably connected. To prevent carburetor icing, an insulating box encircles the carburetor and cooperates with the body, when the body is in place.

Abstract: In a water-cooling system for a water-cooled horizontal cylinder engine, a radiator and a radiator fan are arranged at the front of a cylinder head which is mounted forwardly of a cylinder block of the engine. A radiator fan generates a cooling air flow which passes through the space over the cylinder head and toward the radiator, the height of the radiator being sized to match the width of the cylinder block measured in the upward and downward direction.

Abstract: An internal combustion engine includes a crankcase with a crankshaft which drives at one end face of the crankcase, auxiliary aggregates--oil pump--and endless elements. The oil pump and the endless elements are covered off by means of a covering which consists of a sheet metal part including two thin-walled layers and is constructed pot-shaped in cross section. This light-weight covering which is simple in construction is secured at the end wall of the crankcase by means of an edge flange and by means of bolts.

Abstract: In a single- or multiple-part protective cover for traction drives (for instance, chain, belt, toothed belt drives or the like), in particular for vehicle engines, vehicle drives, machines or the like, a protection of the traction drive from impairment by excessive heating during operation and from the entry of dirt particles, rainwater, snow and other foreign bodies is attained in that at least one coolant overpressure inlet opening (2) is embodied in the walls of the protective cover (1) and communicates with at least one source emitting the pre-filtered coolant at overpressure.

Abstract: An outboard marine motor housed by a cowl assembly having an upper cowl section and a lower cowl section includes various features for improving the structural integrity of the cowl assembly and for providing a water-resistant seal at the joint between the cowl sections and at various points of entry of cables and other mechanical devices. A cut-out portion in the side of the lower cowl assembly is adapted to receive various cables and shift levers for different configurations of outboard marine motors, e.g. a manual tiller-operated motor including shift controls, a manual tiller-operated motor having a separate shift lever, and a remote-control motor having throttle and shift cables leading into the engine cavity. A sealing mechanism is provided at the cut-out portion of the lower cowl assembly, to provide a water-resistant seal at the points of entry of the cables or shift lever through the lower cowl section.

Abstract: The oilpan of a low-noise crankcase is bolted to the downwardly extending ankcase sidewalls and has omega-shaped crosspieces extending transversely to the oilpan sidewalls and to the sidewalls of the crankcase, and the crosspieces are in alignment with the main bearing walls of the crankcase. The crosspieces form part of the oilpan and are connected to its sidewalls in such a manner that forces are propagated, the sidewalls being reinforced as compared to the bottom of the oilpan which is not reinforced. The oilpan is bolted to the crankcase by additional bolts located in pockets in the crosspieces on both sides of the cylinder axes, and are attached to the crankcase as far away from the outer walls thereof as possible.

Abstract: An outboard marine motor housed by a cowl assembly having an upper cowl section and a lower cowl section includes various features for improving the structural integrity of the cowl assembly and for providing a water-resistant seal at the joint between the cowl sections and at various points of entry of cables and other mechanical devices. A one-piece lower skirt extends downwardly from the lower cowl section at the upper end of the depending gear case. The one-piece lower skirt is adapted for easy removal and attachment to facilitate servicing of the motor, and may be connected to the bottom of the lower cowl section in a plane substantially transverse to the longitudinal axis of the depending gear case.

Abstract: A timing-chain cover cap for a timing-chain cover comprising a generally semi elliptical cap body, the upper portion thereof being in circular shape while the lower portion thereof being in arcuate shape, and the bottom of the cap body is encircled by an integerally formed locating plate member except that part beneath the arcuate portion. By means of a plurality of holes provided on said locating plate member, the cap body can be threadingly fitted onto the timing-chain cover.

Abstract: An improved overhead valve internal combustion engine is disclosed in which an intake port defined in a cyclinder head for communication at its outlet side opening with a combustion chamber opens at its inlet end in a first side of the cylinder head for connection to a carburetor. An exhaust port also formed in the cylinder head for communication at its inlet side opening with the combustion chamber opens at its outlet end in a second side of the cylinder head that extends substantially perpendicular with the plane of the first side for connection through an exhaust duct to a muffler that is located on the opposite side of the cylinder head to the carburetor. This arrangement can enhance cooling of the cylinder and cylinder heads of an engine and miniturize engine overall size, without shortening the length of the exhaust duct connected between a muffler and exhaust port.

Abstract: An engine induction air filter element and a positive crankcase ventilation breather element are combined into a single discardable cartridge which is received within an air cleaner housing in a vehicle induction air system. The induction air filter media is comprised of an array of pleats, the tips of which respectfully define the upstream and downstream planes of the filter. A sealant material circumscribes the perimeter of the downstream plane of the induction air filter, and the sealant material on one end thereof includes a projecting portion which supports the breather air filtering media on the one side of the induction air filtering media, with a gap therebetween which receives a partition which is a part of the air cleaner housing. The partition includes a flow restricting aperture, which is closed by the transverse surface of one of the end pleats of the induction air filtering media.

Abstract: An outboard marine motor housed by a cowl assembly having an upper cowl section and a lower cowl section includes various features for improving the structural integrity of the cowl assembly and for providing a water-resistant seal at the joint between the cowl sections and at various points of entry of cables and other mechanical devices. An improved air intake duct prevents the entry of water into the interior cavity of the cowl assembly. The air intake duct is disposed in an air intake opening provided in the top rear portion of the upper cowl section. The air intake duct includes a bottom wall, a pair of upstanding side walls connected thereto, and an upstanding back wall extending between the side walls. The top wall has an upwardly facing opening which forms an air inlet for allowing air to pass into the interior of the cowl assembly, to provide combustion air for the engine of the outboard motor.

Abstract: A heating and cooling assembly in association with an internal combustion engine for minimizing the effect of temperature extremes on engine components. The assembly includes an enclosure which is located beneath or near the radiator such that the radiator traverses and divides the enclosure for forming air flow channels into the enclosure. The movement of air through the radiator passes across the channel openings and into the enclosure for creating a slight differential pressure which enhances the flow of air through the enclosure. Valves or baffles are provided such that the assembly may be switched from summer to winter operation.

Abstract: A vehicle with a noise-damped drive assembly is disclosed which includes a liquid-cooled internal combustion engine having a radiator with a cooling fluid running therethrough and located in a stream of air. An exhaust manifold having a drive assembly connected thereto is provided. The drive assembly is surrounded by a noise-damping case which has at least one air inlet opening located in a lower front portion of the case in a direction of travel of the vehicle. The case also has at least one air outlet opening located in an upper back portion of the case in the direction of travel. The radiator and exhaust manifold located outside of the case.

Abstract: In the case of a shearing element that can be used as an engine mounting in a motor vehicle, an elastic damping body that is developed in the way of a rubber--metal mounting and a shearing unit are provided in a mechanical parallel connection for supporting the engine at the body. It is their purpose to avoid, in the natural-vibration range of the mounting--mass system, an excessive increase of the amplitudes in the case of a resonance.

Abstract: A carburetor heating device for a small snowmobile having a belt type transmission. The transmission is provided with a cooling system for circulating cooling air across the belt and the heated cooling air is then discharged in proximity to the engine induction system for heating it.

Abstract: A high compliance seal is applied between each cylinder block end wall and an intake manifold which acts as a cover for the lubricant containing space between the banks of a V-type engine. The seal is formed of a rubber-like resilient material with rows of small waffle-like recesses formed on each of the sealing sides between intersecting spaced longitudinal and lateral ribs. The longitudinal ribs on the upper side are laterally staggered with respect to those on the lower side to form, as viewed in transverse cross-section, a sinuous body configuration that straightens out and flattens so as to combine with deformation of the resilient material into the recesses to provide a high degree of resilient compliance without overstressing of the resilient material.

Abstract: An air cleaner having a tangentially directed inlet, a converging flow path about the unfiltered side of the air filter and a plurality of openings in the sidewall of the air cleaner housing for expelling heavier than air particles.

Abstract: An outboard marine motor housing by a cowl assembly having an upper cowl section and a lower cowl section includes various features for improving the structural integrity of the cowl assembly and for providing a water-resistant seal at the joint between the cowl sections and at various points of entry of cables and other mechanical devices. A rotary latch mechanism includes an internal hook connected to a shaft leading to an external rotatable handle. The shaft is supported on either side of the point of engagement of the hook to the shaft. In particular, a bearing is formed integrally with the bottom of the lower cowl section and is adapted to receive an end of the shaft for support thereof. The catch for the latch mechanism is provided with a hook-receiving member having support on both sides of the point of engagement of the hook-receiving member by the hook.

Abstract: A gasoline engine driven flexible line trimmer is provided with a modularly constructed power head section which significantly facilitates the original manufacturing assembly, and subsequent service disassembly, of the power head. In a clutch drive embodiment thereof, the power head has four readily separable modules--an engine module comprising a main engine shroud to which the engine is internally secured; a fan housing module; a starter module comprising a starter housing and a recoil starter mechanism retained therein; and a coupling module comprising a clutch housing carrying therein structure for operatively interconnecting the engine's clutch to the flexible drive shaft disposed within the trimmer shaft. In a direct drive version thereof, the power head has two separable modules--the engine module and a combined fan housing, starter and coupling module defined by a single housing within which the starter and coupling structure is carried.

Abstract: An internal combustion engine is provided with a sound-insulating enclosure (2), which defines a sealed passage extending through the enclosure. A passage which extends through the enclosure is sealed by a sealing ring (9), which consists of a rubber-elastic material and is disposed between an inner flanged ring (7), which is secured to the engine, and an outer flanged ring (8), which is secured to the enclosure (2). In order to provide sealing means which are satisfactory for a passage for the exhaust manifold (3), the inner flanged ring (7) carries a protective shield (10), which shields the inside surface of the sealing ring (9) and which defines with the sealing ring (9) a clearance (12), which contains a heat-resisting and sound-absorbing insulating material (11).

Abstract: A reciprocating internal combustion engine which is enclosed by a sound-insulating sheath comprises a crankshaft. A coupling which insulates against structure-borne sound is provided for coupling the crankshaft to an auxiliary drive shaft for driving auxiliary devices disposed outside said sheath. Said coupling comprises a resilient ring and axially parallel connecting screws, which are peripherally spaced apart and are secured in alternation to the crankshaft and to the drive shaft and extend through tubular spacers mounted in the ring. The drive shaft is rotatably mounted in a mounting plate, which is fixed to a crossbeam. The internal combustion engine is supported on the crossbeam by an annular member which insulates against structure-borne sound.

Abstract: A sealing structure around an intercooler arranged in an engine room of an automobile, in which an intercooler cover covers surroundings of the intercooler, and an annular sealing member is mounted to an engine hood for making resilient and tight contact with the intercooler cover to seal a peripheral portion of an air inlet of the engine hood and the intercooler cover when the engine hood is closed.

Abstract: An FIP (Formed In Place) gasket arrangement includes three hollow parts which are joined with each other in such a way as to sealingly separate the inside and outside thereof. Two of the parts have surfaces which are flush with each other and adjoin at a line extending between the inside and outside of the two parts. The remaining one of the parts has a surface joined with the surfaces of the two parts by interposing therebetween an FIP gasket. The two parts also have edges extending along the above mentioned line, one of the edges being partially chamferred to provide a chamber. The FIP gasket has a portion filling the chamber.

Abstract: A sealing structure for providing a relatively leak-proof seal between the junction of two gaskets which are disposed at an angle relative to one another is disclosed. A first gasket is interposed between two pieces of a first component of a vehicle engine or other device. When the two pieces are assembled together, the first component defines a surface adapted to mate with a corresponding surface formed on a second component of the device. An edge of the first gasket extends beyond the mating surface of the first component. The edge of the first gasket includes a plurality of outwardly extending projections formed integrally therewith. A second gasket is interposed between the mating surfaces of the first and second components. The second gasket includes a plurality of recesses formed in a face thereof, each of which corresponds to one of the projections formed in the first gasket.

Abstract: A two wheel motorcycle of the scooter type employing a power unit with an engine mounted forwardly of the rear wheel, a power train extending rearwardly on one side of the rear wheel to couple the engine and the rear wheel and a muffler extending along the other side of the rear wheel. A carburetor is mounted above the power train and an air cleaner for that carburetor is mounted above the muffler. A connecting tube extends transversely of the vehicle between the air cleaner and the carburetor at a location above and forwardly of the axis of the rear wheel.

Abstract: A portable engine unit is provided. The unit comprises an engine including a clutch, a crankcase enclosing a crank shaft, an engine cylinder enclosing a piston and a piston rod, a carburetor, an air filter, a recoil starter, and a muffler; and a housing for enclosing the engine, comprising at least two portions which are assembled and disassembled along a plane including the axis of rotation of an output shaft of the engine to enclose and expose the engine.

Abstract: A drive unit comprising a reciprocating-piston type internal combustion engine and a transmission and output shaft is disclosed in which the sound-generating parts of the internal combustion engine are combined to form one driving mechanism body which is supported via an element which transmits power and isolates structure-borne sound, at the engine casing constructed as a noise capsule. To prevent sound from being radiated from the transmission casing towards the outside and structure-borne sound from being transmitted to the noise capsule, the transmission casing is rigidly connected to the driving mechanism carrier and the noise capsule also encloses the entire transmission casing.

Abstract: An outboard marine motor housed by a cowl assembly having an upper cowl section and a lower cowl section includes various features for improving the structural integrity of the cowl assembly and for providing water-resistant seal at the joint between the cowl sections and at various points of entry of cables and other mechanical devices. A cut-out portion in the side of the lower cowl assembly is adapted to receive various cables and shift levers for different configurations of outboard marine motors, e.g. a manual tiller-operated motor having a separate shift lever, and a remote-control motor having throttle and shift cables leading into the engine cavity. A sealing mechanism is provided at the cut-out portion of the lower cowl assembly, to provide a water-resistant seal at the points of entry of the cables or shift lever through the lower cowl section.