Abstract: An internal combustion engine for an automobile is encased in a sound-insulating casing and is mounted on a frame of the automobile via sound-proofing suspensions. The wall of the casing extends around the suspensions, at which point the casing is supported on the frame by means of casing wall portions. These casing wall portions are acoustically insulated from the remainder of the casing wall by sound-insulating intermediate layers, e.g. by flat, elastic, annular sealing rings.

Abstract: A noise-proof and air-cooled enclosure system for an engine comprising a radiator compartment, a generally enclosed engine compartment separated from said radiator compartment by a partition wall, said radiator compartment being arranged sideways with respect to said engine compartment, and an ejector utilizing the flow of gases from an engine exhaust pipe for creating a relatively low pressure within an air outlet from said engine compartment to draw ambient cooling air through said radiator compartment into said engine compartment around said engine and out of said air outlet.

Abstract: A truck or truck tractor having an opening between the base of its windshield and the rear end of its hood. Air pressure in this area drives air through a moisture tray and a collector trap to a conduit to an air cleaner leading to a turbocharger. Rain, snow and/or ice in the air is removed into the moisture tray and the collector trap, and the air cleaner has a moisture filter therein to remove any, slight residue.

Abstract: An air cleaner especially for use on small single cylinder internal combustion engines has a substantially annular air filter element of the dry paper type, removably mounted in a housing to divide the same into inner and outer compartments, the latter having an outlet for cleaned air that is connectable with the air intake port of the engine carburetor. An inlet passage for air to be cleaned which leads to the inner compartment, is so constructed that air flowing therethrough must undergo an abrupt change in direction in order to reach the inner compartment, and has an outlet so located that solid contaminants entrained in the air flowing to the inner compartment, by virtue of the tendency thereof to continue moving in the direction they were, leave the inlet passage through that outlet and hence are separated from the air before it enters the inner compartment.

Abstract: A reciprocating piston internal combustion engine comprises an integrally formed or cast engine block having an upper half of main bearings for receiving the journal of a crankshaft, a bearing support frame secured to the bottom portion of the engine block and having a lower half of the main bearings, and a sound-insulating cover secured to the outer surface of the engine block to cover the lower part of the engine block, so that the engine noise and vibration can be effectively decreased.

Abstract: A semicircular plug to be fitted in a semicircular recess formed in either end of a cylinder head of an overhead cam shaft engine for preventing leakage of lubricating oil. The semi-circular plug has a pin hole in the center of its outer periphery for receiving the upper portion of a pin bedded in a pin hole provided in the center of the semicircular recess.

Abstract: An internal combustion engine with a sound-insulating enclosure and with a radiator arranged outside of the enclosure having a cooling fan and a cooling air box which has a discharge outlet outside of the enclosure; at least one cooling air line is thereby connected with the cooling air box which extends into the enclosure and whose discharge opening or openings is or are directed at least against one part or aggregate to be cooled.

Abstract: Apparatus for the combined production of heat and electrical energy comprising an internal combustion engine driving an electricity generator and enclosed in a thermally insulated housing with heat exchangers for extracting heat from the engine coolant, the engine oil, the exhaust gases from the engine and from the electricity generator, and for transferring this heat to an external heating circuit, in which all the components are carried by a rectangular or cubic supporting framework to which the thermal and acoustic insulation panels are attached by quick-release fastenings, the engine and generator being connected together to form a rigid unit which is suspended from the framework while the ignition equipment of the engine is housed externally of the framework and cooled by the incoming air being drawn into the engine flowing through a housing in which it is supported.

Abstract: The carburetor of a motorcycle engine is fastened to an engine cylinder by a thin resilient hose connecting the fuel mixture outlet port of the carburetor to the intake port of the cylinder. The carburetor is fastened to the casing of the associated air cleaner much more rigidly than it is fastened to the cylinder. The fastening connection between the carburetor and the air cleaner casing is provided by a tubular member having a wider orifice fastened to said casing, a narrower orifice fastened to the carburetor, and a shoulder portion connecting the orifices and of greater wall thickness near the float chamber in the carburetor than elsewhere.

Abstract: An internal combustion engine includes an engine block and an oil pan sealingly secured to one another along substantially horizontally extending mounting faces to constitute a unit and a sound-insulating capsule shrouding the engine block and having a lower terminal zone. A sound dampening mounting arrangement is provided for attaching the lower terminal zone of the capsule to the unit at the height level of the mounting faces.

Abstract: An air intake assembly for a vehicle comprises a first housing rotatably mounted on the vehicle and a stationary second housing mounted within the first housing. A plurality of first inlets are formed through the first housing and are adapted to align with a plurality of second inlets formed through the second housing to normally permit the passage of air therethrough for engine consumption purposes. Upon further relative rotation of the housings, the inlets become misaligned to prevent the passage of air therethrough. In the preferred embodiment, inlets are formed through both side and bottom walls of the housings and disposed thereon whereby upon alignment of the inlets formed through the side walls of the housing to permit the passage of air therethrough the inlets formed through the bottom walls of the housings will be closed and vice versa.

Abstract: To compensate for positional variations during assembly or in use between an engine body or crankcase and a sound-proofing shell enclosing the same, use is made of interposed spring arrangements including a load-setting means.

Abstract: A reciprocating piston internal combustion engine comprises an engine block formed with first bearing carrying portions which carry a group of upper generally semicylindrical parts of main bearings for supporting a crankshaft, and a bearing support block secured to the engine block and formed with second bearing carrying portions which carry a group of lower generally semicylindrical parts of the main bearing, so that the engine block is reinforced to prevent generation of engine noises due to low flexural rigidity of the engine block.

Abstract: An internal combustion engine comprises an engine unit support which contains the engine parts directly affected by body resonance (cylinderhead, cylinder, piston, connecting rod, crankshaft main bearing, and crankshaft) and a crankcase connected to the engine unit support by flanges located above the crankshaft. The crankshaft main bearings consist of bearing blocks and bearing caps which are connectable to main bearing units independently from the main bearing bolts. The bearing units are detachably secured to the engine unit support. The crankcase is provided with at least one aperture closed by at least one cover part below the crankshaft, said apertures providing access to the main bearing bolts. Dismounting of the engine unit support is enabled with the crankshaft and the main bearing units mounted thereon remaining in the crankcase and the crankcase remaining mounted on its place, for instance in a vehicle.

Abstract: An internal combustion engine with a sound-reducing encapsulation, wherein at least the hottest parts of the exhaust system of the engine are located outside of the engine encapsulation and within a special exhaust pipe casing. At the upper side of the exhaust pipe casing an air outlet opening is provided through which the air heated by the exhaust system parts can emerge to the surroundings without getting into the encapsulation. The air outlet opening is lined with sound-absorbing material. The free sectional area of the air outlet opening preferably may be variable by flap means and in dependency of an engine operation parameter. The flap means can be operated by a hydraulic cylinder connected to the lubricating system of the engine.

Abstract: A low-noise-level combustion engine comprises an engine unit support with auxiliary units rigidly connected thereto, a crankcase and a flywheel case. The engine unit support, as an engine part directly affected by sound vibration, is connected to the crankcase by at least three resonance-absorbing elements which provide power transmission from the engine unit support to the crankcase. The engine comprises further a sealing element located between the engine unit support and the crankcase, which divides the engine into a lower oil-wetted engine region and an upper dry engine region which is oil-tightly sealed against the lower engine region. The sealing element surrounds the engine, the engine unit support, and is attached to the engine unit support and to the crankcase. It has no supporting function and is highly resilient.

Abstract: Apparatus for resiliently mounting an oil pan to an engine crankcase, which eliminates oil pan vibration and prevents oil leakage. A first resilient member is located between the crankcase and the pan and a second resilient member is located between the pan and a depressing plate. The second resilient member has a coefficient of elasticity greater than that of the first resilient member, so as to resist compressive deformation. The depressing plate is provided with an upwardly bent edge which also aids in preventing compressive deformation of the second resilient member.

Abstract: An internal combustion engine having a noise-suppressing encapsulation, a cooling air blower to ventilate the encapsulation, at least one cooling air inlet opening and at least one cooling air outlet opening arranged in the encapsulation, and an exhaust pipe connected to the engine by means of at least one body-resonance-absorbing compensator located at least partially within the encapsulation. The compensator penetrates the encapsulation without touching it and in the region of penetration is arranged at least one plate-like absorption silencer substantially within a plane perpendicular to the compensator axis.

Abstract: An internal combustion engine having a noise suppressing encapsulation, said encapsulation being ventilated by a blower and cooling air ducts being formed within the encapsulation by means of partitions, one of said cooling air ducts comprising all fuel and oil leading engine parts and the other cooling air duct being imperviously divided from the first one comprising the parts of the exhaust system.

Abstract: An engine timing chain snubber comprises a pair of guide shoes fixedly supported on the engine block and extending in line-to-line nondeflecting contact with the inner sides of unsupported chain portions between drive and driven sprockets. The guide shoes prevent movement of the chain runs inwardly of their tensioned positions and thus prevent chain oscillation or vibration.

Abstract: Disclosed is a dust seal used in a front engine - front drive vehicle, wherein the clutch housing portion of a trans-axle case is mounted to the rear end of an engine body through a rear end plate and the differential housing portion of the trans-axle case is arranged below the engine body with a space therebetween. The seal is made of a plate of elastic material and is mounted to a bottom edge of the rear end plate to seal an upper surface of the differential housing portion and cover the front portion of side walls of the clutch housing portion.

Abstract: This disclosure relates to improvements in hydraulic dashpot chain tensioners for the timing chains of motor vehicles. A kit for modifying existing chain tensioners is disclosed which can be readily connected to a chain tensioner to eliminate leakage of air into the dashpot. The kit comprises an open, cup-like oil reservoir adapted to be sealingly secured to the chain tensioner in fluid communication with the dashpot. Baffles are arranged adjacent the open end of the cup member to prevent loss of oil therefrom by reason of centrifugal forces acting on the oil.

Abstract: A ventilation system for an encapsulated internal combustion engine providing a reduction in short-circuit air flow from the pressure side to the suction side of the ventilation radial fan.

Abstract: An internal combustion engine has an engine block, an oil pan and a sound insulating capsule shrouding the engine block. The engine block and the oil pan have circumferential mounting faces oriented towards one another. A mounting arrangement includes a sound dampening intermediate layer situated between the mounting faces for a noise-dampened connection of the oil pan with the engine block and with a lower terminal zone of the capsule. The oil pan is held by the lower terminal zone of the capsule and the capsule is supported by a component other than the internal combustion engine. The intermediate layer is constituted by a gasket which has at least one fold to take up relative motions between the engine block and the oil pan during operation of the internal combustion engine.

Abstract: A sound proof encapsulated engine, particularly an internal combustion engine, comprising a fan and an intermediate support for the fan, the fan being driven by an elastic element and mounted on the engine case with the aid of the intermediate support by means of a number of bearing faces, the fan bearing housing and the fan drive being accommodated within the encapsulation, and between the engine case and each of the bearing faces being provided an intermediate support having n elastic and body-transmitted sound-absorbing element.

Abstract: An internal combustion engine comprises an engine unit support and a crankcase which parts are connected by a resonance-absorbing element. The engine parts located above the resonance-absorbing element are encased by a noise-suppressing encapsulation. The exhaust pipe and the inlet pipe penetrate the encapsulation without touching it and are connected to the cylinderhead by vibration-insulating couplings. Supporting arms are provided which support the exhaust and the inlet pipes. The supporting arms are secured to the crankcase which is freed from body resonance due to the resonance-absorbing element. The supporting arms take over all holding and vibration forces so that the vibration-insulating couplings may be designed very soft in the sense of optimal vibration insulation.

Abstract: A power plant for simultaneously generating electric power and pneumatic pressure which comprises an engine, dynamo and compressor all juxtaposed, and wherein the crankshaft of the engine is disposed on the axis of a common shaft to the dynamo and compressor to be drivingly coupled to the common shaft and jointly rotated with the common shaft, thereby simultaneously generating electric power and pneumatic pressure.

Abstract: A swinging power unit type motorcycle having an engine swingably hung and pivoted on a body frame, and a pair of plates forming a rear fork connected to the engine. A chain drive transmits power from the engine to a reduction gearbox which incorporates the rear wheel axle and is supported between the rear fork. Shock absorbers are connected between the body frame and the rear fork. The engine, rear fork, rear wheel axle, chain drive, and reduction gearbox are interconnected to swing as a unit relative to the body frame.

Abstract: A magneto casing for an engine connected to an engine crankcase in liquidtight sealing relationship by means of an oil seal which permits small amounts of air to pass therethrough is formed therein with an air passage having mounted therein a filter which is repellent to water but permeable to air. When the internal pressure of the magneto casing undergoes changes due to variations in the pressure within the crankcase which occurs when the engine operates, only air is allowed to flow into and out of the magneto casing through the filter in the air passage and water is prevented from entering the magneto casing.

Abstract: The apparatus is employed to fixedly position an internal combustion engine upon a frame. The engine is normally provided with a pair of oppositely positioned arms which are affixed to the engine and project outwardly for connection to a frame. A supporting structure intermediate the engine and the frame is connected to the arms extending from the engine at a first point and to the frame at a second point. This supporting structure comprises a first and second spaced apart generally U-shaped members which have sloping parallel sides provided with a resilient mass therebetween. The first member is provided with a cover plate which is affixed thereto, and thereby forms a hollow chamber with the first member. Within this hollow chamber is disposed another resilient mass that in turn is enclosed by an abutment positioned thereabove. The second member is likewise provided with still another resilient mass which is positioned on a surface beneath the first member.

Abstract: An internal combustion engine having a sound-deadening shroud surrounding the engine block and connected to latter with the interposition of anti-vibration means. An exhaust plant through which combustion gases are connected is arranged external of the shroud and connected to the engine block. A separate enclosure is secured to the shroud and encloses the exhaust plant leaving a small air gap on all sides between the exhaust plant and the enclosure with only the exhaust pipe of the exhaust plant projecting from the enclosure through an opening.

Abstract: An engine is provided having a pair of cylinders, the cylinders being arranged in the shape of the letter V on the crankcase, whereby partially enclosed spaces are formed between the cylinders, and between the cylinders and the crankcase. Engine auxiliary components and fittings, including an air cleaner, a carburetor, a self-starter, an accelerator mechanism, an oil filter, an oil gauge and a lubricant orifice are mounted in said partially enclosed spaces to provide an engine assembly of minimum size in which the auxiliary components are relatively protected from damage.

Abstract: A signal indicating device for an internal combustion engine. The internal combustion engine has a sound absorbing shell surrounding the engine body. An air intake pipe is mounted on the engine and an air intake filter is mounted on the inlet end of the air intake pipe. The signalling device is provided to indicate the degree of contamination of the air filter. The signaling device can be a visual signal or an audible signal.

Abstract: A sound absorbing arrangement for an internal combustion engine having sound absorbing panels encasing the internal combustion engine. Cooling air is drawn in through openings in the paneling to subject the external surface of the engine body to the cooling air. The panels are lined with a sound absorbing material. The sound emitted from the air filter is muffled by arranging the air intake thereto so that it passes first in and around the engine and then through an intake pipe from the chamber defined by the paneling into the air filter.

Abstract: A sound abatement device for an internal combustion engine including a contoured shell resiliently mounted to reduce sound transmission through the shell mounting. The shell is formed of plastic filled with powdered metal to reduce transmission of air transmitted sound from the engine through the shell.

Abstract: A V-shaped, air-cooled engine is provided with a cover on the front thereof, which houses a cooling fan connected to the engine's crankshaft. The interior of the cover is fitted with dividers to separate the air flow and direct it to the opposite sides of the engine, and to form a compartment for housing components of a non-contact ignition system. The non-contact ignition system is operated by the cooling fan, and is cooled by the flow of air through the cover. Components of the ignition system are permanently connected to each other, without the usual separable connectors.

Abstract: An internal combustion engine with auxiliary machines driven by a V-belt and pulley from the engine the engine and the pulley being enclosed by a sound suppressing encapsulation, the auxiliary machines being mounted externally of the encapsulation, the V-belt extending at least partly through a sound absorbing funnel-shaped leadthrough to the pulley, the funnel-shaped leadthrough providing a silencer unit and a passageway for the intake of cooling air into the encapsulation.

Abstract: A cover is provided for an engine which has first and second spaced-apart portions and an air cleaner. The cover has a middle portion, first and second opposed side portions, and first and second opposed end portions. The side and end portions are connected to the engine and form a chamber defined by the engine portions and the cover. The air cleaner is mounted on the middle portion of the cover.

Abstract: A device for carburetion of liquid fuels including an ultrasonic oscillator and at least one fuel supply nozzle which supplies fuel into engagement with the oscillator. The oscillator is disposed in an air tube so that the fuel which is acted upon by the oscillator can be mixed with air to form a fuel-air mixture.

Abstract: An air sucking device for engines wherein the suction pipe, carburetor, and air cleaner are integrally connected together. The carburetor and suction pipe are housed within a covering so that the device affords protection and a favorable appearance for the respective components. The suction passageway is of a sufficient length to make operation of the engine more efficient.

Abstract: An improved isolated oil pan assembly is provided for use on an internal combustion engine, such as a diesel engine, thereby eliminating a serious problem associated with prior engines of this type; namely, a source of undesirable noise. The improved pan assembly includes a pan which is secured to the underside of the engine block by a plurality of fastening means spaced from one another and disposed inwardly from the periphery of the pan. Each fastening means is positioned within an elongated sleeve-like pocket which is recessed from the underside of the pan and extends through and protrudes from an opening formed in the upper end of the pocket. The protruding portion of the fastening means is secured to a rigid stationary member disposed within the interior of the engine block. Each fastening means is isolated from the corresponding oil pan pocket by an isolator formed of resilient, vibration isolating, oil impervious material.

Abstract: An arrangement for mounting a fuel metering control pump on an internal combustion engine comprises the air intake system via which air is drawn into the engine, said system including a generally annular support element on which the control pump mounts. Means are provided for mounting the annular support element on the intake manifold of the engine with induction air passing through a central aperture defined by the inner periphery of the annular support element. The control pump is disposed adjacent this aperture and meters fuel via a suitable fuel distribution system into the induction air stream to form the combustible mixture for the engine. The control pump includes an inlet port which passes through an opening in the wall of the annular support element to provide for connection of a fuel supply line thereto exteriorly of the air intake system. A similar arrangement is provided for a return line to the fuel tank.

Abstract: A vehicle component assembly wherein a plurality of auxiliary structures associated with the engine and transmission of a vehicle are disposed in a preselected space. A number of the auxiliary structures may be mounted to a common support for facilitated preliminary testing and installation in the vehicle. An enclosure may be provided for enclosing the space in which the structures are disposed and may include selectively positionable closure structure for providing selective access to the auxiliary structures in the space.

Abstract: A construction for V type internal combustion engines having a pair of banks arranged in a V shaped form. An intake duct is composed of a metal sheet bottom portion and a metal sheet body formed with an intake passage both of which are coupled to each other. Partition walls are also provided on the front and rear end portions of the engine and coupled with the bottom portion of the intake duct so as to form a soundproofing chamber between the pair of banks.

Abstract: The fuel passing through the main discharge nozzle of a carburetor is positively vibrated or be caused to pulsate to supply well atomized fuel into the air-fuel mixture induction passage of the carburetor in order to improve the combustion condition within the combustion chambers of an internal combustion engine.

Abstract: An internal combustion engine having the cylinders thereof arranged in a V-formation and having a sound deadening material jacketing the body of the engine. Two plate-like carriers are gripped between the confronting parts of the cylinder housing and the outwardly projecting rims thereof to constitute a frame which surrounds the engine body from all sides. A plurality of deadening shells conforming to the shape of the engine body bear in sealed fashion against the frame with the interposition of at least one vibration deadening insert. These shells are secured to the body of the engine with the intermediary of spacer elements providing a vibration dampening support.

Abstract: An internal combustion engine has an enclosure mounted therearound comprising an outer enclosure having a horizontally disposed hood positioned over a top of the engine and a pair of vertically disposed sidewalls positioned on either side thereof. An inner enclosure, disposed within the outer enclosure, comprises a horizontally disposed upper wall which is spaced vertically between the top of the engine and the hood to define first and second airflow passages therewith, the second airflow passage being further defined in part by the sidewalls. The inner enclosure further comprises a vertically disposed forward wall positioned adjacent to the front of the engine. An airflow guide means is secured internally on each of the sidewalls to define a passage therebetween which communicates with the second airflow passage defined about the engine.

Abstract: Low-noise-level internal combustion engine with an engine unit support and a cylinder head mounted thereon, auxiliary units rigidly connected to the engine unit support and the cylinder head, an engine case surrounding the engine unit support and connected to same by at least one resonance absorbing member.

Abstract: Apparatus for attaching a fuel tank in an internal combustion engine, the apparatus comprising a wave-like seat plate including an assembly with alternately curved concavities and convexities therein, applied with said concavities to a lower surface of a bottom plate of the fuel tank so as to form adiabatic spaces above the concavities, and between the seat plate and the bottom plate, the assembly being secured with the seat plate to an upper surface of the engine body. Optionally, this body may have plural projecting fins, forming air passages into which cooling air may be led, for example from a fan.

Abstract: An internal combustion engine having a soundproof casing aerated by a blower and divided by at least one partition wall into two cooling air ducts tightly separated from each other, one of the ducts containing all fuel carrying members of the engine, the second duct containing the members of the exhaust system of the engine, the cooling air ducts being admitted by two partial cooling air flows.