Abstract: A chain saw having a housing in the form of a plastic shell of structural foam fully open on one of its lateral sides to expose a central chamber. The chain saw includes an integral motion assembly formed of an engine, a blade mounting bracket, forwardly projecting blade and driven cutter chain. A mounting plate is secured to the underside of the engine, the plate being formed of a thin plate of metal having substantially parallel front and rear edges received in front and rear grooves within the shell, the central chamber being sized to receive the engine so that the engine and mounting plate may be slid into seated but floating position in the chamber in the manner of a drawer. Resilient connectors interposed between the engine mounting plate and the shell and interposed between the blade mounting bracket and the shell hold the motion assembly in seated position.

Abstract: An engine block and crankshaft bearing seal sealing the main bearing cap with the block and the periphery of the crankshaft.

Abstract: An engine of a motor vehicle is equipped with a sound-insulating cover which is secured to a portion of an engine proper to surround the engine proper. An oil pan filled with engine oil is hermetically connected to the bottom portion of the sound-insulating cover so that the oil pan is spaced apart from the skirt portion of a crankcase.

Abstract: An internal combustion engine has a plurality of air intake conduits, air intake nipples, an air filter operatively coupled to the air intake conduits, a sound insulating capsule covering the engine, and at least one inlet opening in the capsule for admitting intake air. The intake conduits are integrated in the capsule and are directly connected to the respective air intake nipples.

Abstract: A combined gear cover and mount for an internal combustion engine is disclosed for use on an engine having a vibration damper mounted on a projecting end of the engine crankshaft wherein the gear cover includes a housing for enclosing the vibration damper while re-enforcing the engine mount formed integrally with the gear cover. The gear cover is adapted to connect with a gear plate mounted directly on the engine block to form an enclosure for the gear train of the engine. The gear cover also includes an integral fan clutch housing and a lubrication fluid transfer passage for an engine driven air compressor.

Abstract: A low noise internal combustion engine comprises a crankshaft rotatably carried by a group of bosses attached to a lower end surface of a cylinder block. The group of bosses are bridged by a frame sections to increase rigidity of the bosses against bending stress applied thereto with respect to an axis of revolution of the crankshaft.

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: An air induction system which reduces the fuel odor and noise of a diesel engine includes two acoustically insulating baffle elements which cover a fuel pump, fuel pipes and fuel injectors and cause the air inducted by the engine to pass through an air filter interposed between the baffle elements, thereby inducting the fumes from the fuel system along respective pipes which extend across the top of the engine into respective cylinder air induction ducts.

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: 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: 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: Internal combustion engine having one or more cylinders and an engine cover encircling the cylinders with a space for defining a cooling air passage therebetween. The engine cover is made of a non-metallic resilient material such as rubber or resinous material and secured to the engine. The engine cover is formed at its inside surface with one or more projections which are adapted to be fitted to the spaces between cylinder cooling fins.

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: 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: 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: 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: A cover for a ventilation valve in a vehicle engine provided in the passage of blow-bye gas to be transmitted into an intake manifold. The cover is adapted to isolate the ventilation valve from the cold and prevent it from being freezing.

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, 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: 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: 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: 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 fuel supply system is provided, including a plurality of fuel injection pumps within the cylinder head on a cylinder block, a fuel manifold having a fuel supply portion and a fuel return portion external to the cylinder head and extending the length thereof, each pump having a fuel supply and outlet passage integrally formed in the cylinder head and communicating with an annular passageway about each fuel injector, each said fuel supply and outlet passage further communicating with said fuel manifold by means of a pair of exterior conduits extending from the manifold directly to opposite ends of said passage in the cylinder head, each said exterior conduit extending exteriorly of the valve covers to preclude contamination of engine lubricant with fuel that may leak from the connections between exterior conduits and the passages in the cylinder head.

Abstract: A reinforced stamped valve cover including an elongated housing having a trough-like configuration including an elongated base wall, a pair of spaced, elongated side walls attached to and extending from one side of the base wall, and a pair of spaced, relatively short end walls extending from the base wall and adjoining the end walls. The walls are stamped from a single sheet of metal and are provided with an outwardly directed ledge substantially surrounded by a peripheral flange. A pair of spaced, U-shaped strengthening members are disposed within the housing with each having a bight and a pair of legs extending therefrom. Each bight is configured to substantially conform to the base wall and is in substantial abutment therewith. Each leg abuts a corresponding one of the side walls along substantially the entire extension thereof from the base wall and past the ledge to define with the flange a gasket-receiving pocket.

Abstract: A motor vehicle has an engine equipped with an oil sump which is secured in a body-sound-insulated manner to the engine block, and a fan-cooled water radiator, a frame-mounted elastic membrane being provided between the oil sump and the vehicle body components so that the membrane completely encircles the oil sump at its upper edge and provides an acoustic separation between the spaces respectively situated above and below the oil sump, the upper space comprising a sound suppressing encapsulation which is closed relative to the vehicle interior by appropriate wall panels, partitions and sealing sections provided in the vehicle body. The outflow of hot cooling air from the radiator completely by-passes the encapsulation, the sealed upper space of the encapsulation being cooled by the forced draught of a further fan, and sound absorbing silencers being provided at inlet and outlet openings for the cooling air in the encapsulation.

Abstract: An engine crankcase has oppositely inclined surfaces thereon, to which cylinders equipped with cooling fins are attached, to form a V-shaped engine. The crankcase has a crankshaft rotatably mounted therein, the front end of which projects from the front of the crankcase and has a cooling fan mounted thereon, the fan being housed within a cover adapted to pass cooling air backwards over the cylinders. A cam shaft is mounted vertically above the crankshaft, and the two are connected by gears mounted at the front of the crankcase. The rear end of the V-shaped region between the cylinders is open to provide for the escape of foreign matter, and the engine is balanced by locating the governor and the lubricant pump within the rear end of the crankcase.

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: 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: A modular internal combustion engine is provided in which a single crankcase can be adapted to a plurality of different types of engine configurations. The crankcase is open at its top so that each upper side edge of the crankcase forms a mounting flange while a crankshaft is rotatably carried by the crankcase. Block members and adapter members are provided and each includes a mounting flange formed along each longitudinal side. All of the mounting flanges are substantially identical to each other so that any one mounting flange can be detachably secured to another mounting flange. Thus to construct the engine, one mounting flange of either the block or adapter member is attached to one crankcase mounting flange while one mounting flange on the other member is attached to the other crankcase mounting flange. In addition, the remaining mounting flanges on the block and adapter members register with each other and are secured together.

Abstract: An enclosure spanning circuit for carrying fluids through opposed nonparallel walls of an enclosure used in a preferred embodiment to drain the open valley cover and manifold member of a V-type automotive diesel engine through a drain tube extending through walls of the valley cover and engine block and the crankcase enclosure and having sealing means at the associated wall openings to prevent leakage of the drained fluids into or crankcase vapors out of the engine crankcase.

Abstract: A system for preventing outflow of oil from an oil filler port of an overhead camshaft engine. The system comprises a partition wall extending downwardly from a cylinder head cover to divide the interior thereof into a timing chain chamber having a timing chain gear and a timing chain and a valve chamber having the oil filler port, a cam shaft and intake and exhaust valves. The partition wall prevents lubricating oil splashed in the timing chain chamber by rotation of the timing chain from getting into the valve chamber, and thereby prevents outflow of lubricating oil through the oil filler port.

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: In an engine having an elongated block terminating at one end in a flywheel housing, a flywheel with at least one timing mark on its periphery and rotatable within the housing, and spaced lifting eyes secured to the engine so that the engine may be lifted from a support, the improvement wherein the flywheel housing has an opening in its generally uppermost surface through which the timing mark may be viewed and one of the lifting eyes includes a base defining a closure for the opening. Bolts removably secure the base to the flywheel housing about the opening to (a) close the opening and (b) secure the lifting eye to the engine.

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: 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: 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: 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: An oil pan designed for installation underneath a crank case of an internal combustion engine, the oil pan of the present invention consisting of two separate sections each of which is secured independently to the engine as well as to each other so that either one can be selectively removed while the other is left on so to eliminate the labor of removing the entire oil pan.

Abstract: A noise reducing material especially suitable for attaching to internal combustion engine casing parts and comprising (a) a layer of a metal such as lead combining a high density with a low shear modulus, bonded to (b) a layer of a pliant thermoplastics matrix reinforced with fibrous material. Layer (b) is preferably asbestos fiber-reinforced bitumen and the laminate preferably comprises a layer of lead between two layers of the reinforced thermoplastics material.

Abstract: A cylinder head for a compression-ignition (diesel) engine has a sector accommodating the upper part of a fuel injector between four valves, the sector being isolated from the tappet lubricating oil by a protecting casing on the upper part of the cylinder head. The casing may itself be sealed by a protective and sound-proofing cover.

Abstract: The disclosure illustrates an isolated rocker arm cover for an internal combustion engine. An elongated continuous elastomeric seal element extends from a groove around the periphery of the rocker arm cover. Spring loaded fastener assemblies resiliently hold the cover against the engine with a sufficient force to provide an effective oil seal but still maintain the cover isolated from the engine. The seal element has a configuration assuring a narrow contact area between the ring and the engine.

Abstract: An internal combustion engine, which has soundproofing cowling, uses the space between the sidewalls of the cylinder block and the cowling to provide a reservoir for a liquid lubricant media. A cover cap is provided over the fuel injection and valve timing mechanisms, and the space between the cover cap and the cowling, which is over the top of the cylinder head, provides a chamber for receiving coolant from the engine cooling system. The large surface area of the cowling along the sides of the cylinder block accommodates the transfer of heat from the lubricant to the atmosphere. In addition both the lubricant and the coolant serve as sound deadening medias in the sidewall reservoirs and in the overhead chamber.

Abstract: Internal combustion engine structure comprising a one-piece cylinder-block and crankcase casting with integral cylinder-head, of light alloy, and incorporating valve guides, induction ports, exhaust ports, spark plug wells, cooling-water chambers open at the upper portion of the casting around the valve seatings and closed by a cover, said cooling-water chambers extending axially around the cylinders and outside the areas corresponding to the induction and exhaust ports and also to the spark-plug wells, said casting further comprising in said areas around said cylinders a wall portion provided with cooling fins, whereby the casting can be obtained directly from a light alloy in a chill-mould, notably according to the known high-pressure casting process.

Abstract: An internal combustion engine, the static parts of which are formed as die castings. The engine includes a plurality of cylinders each closed at its upper end by an individual cylinder head casting. Each cylinder head casting has at least two tubular extensions thereon forming air intake and exhaust passageways and at least two valve stem guides. All of the cylinder head castings have flat horizontally extending upper faces all lying in a single plane and on which a valve train casing casting is seated. A single camshaft is journalled in the valve train casing and arranged to operate the intake and exhaust valves of all of the cylinders. The upper end of the valve trains casing is closed by a cover having a breather opening communicating with the interior of the valve train casing and also having air intake openings communicating with the air intake passageway of each cylinder. A shroud is mounted over the cover to define an air chamber which communicates with atmosphere through an air filter.

Abstract: An internal combustion engine comprising a sound-proof encasing surrounding the outer surfaces of the engine in spaced relation thereto, with a cooling-air inlet and a cooling-air outlet, a blower arranged between these apertures within the encasing and actuated by means of the internal combustion engine, and an additional ventilating device for the ventilation of the encasing after the internal combustion engine has been stopped.

Abstract: An engine cover removably secured to the cylinder head of an internal combustion engine for housing suction and exhaust valves and a valve operating mechanism is provided with an arm which is pivotally connected to a stationary support located close to one side of the engine so that the cover can be rotated or shifted in the lateral direction.