Abstract: An internal combustion engine powering a motor vehicle is provided with a separate exhaust casing which is located within an engine compartment developed into a sound-insulating capsule, and is designed as a roof-type cover without a bottom shielding at least those parts of the exhaust system close to the cylinder head of the engine. This cover is connected with an outlet opening in an outer wall of the vehicle, which opening is positioned in an area where the heated air rises from the exhaust system, such that ventilation of the capsule and the exhaust system is ensured even after the engine has been turned off.

Abstract: A fuel control apparatus for an internal combustion engine which has an air intake tube includes an electrically controlled fuel injection valve and a control device for controlling the valve in accordance with various parameters of the engine. The control device includes a radiating fin which is located on one end surface of the control device for removing heat which is generated by heat-generating elements which drive the valve. The control device is mounted on the air intake tube so that the radiating fin projects into the air intake tube. In this manner, the radiating fin is cooled by incoming air.

Abstract: The crankshaft of an internal combustion engine is supported in a split bearing assembly near one end of the crankshaft, with the lower half of the bearing assembly formed in a bearing holder secured to the engine block. An arcuate flange projects axially towards that end of the crankshaft. The flange underlies a crankshaft pulley which drives a timing belt. The arcuate surface of the flange is struck from a center offset from the crankshaft axis in order to provide clearance for the timing belt. The offset construction also improves the joint seal between the oil pan and the engine block.

Abstract: An assembly is provided for use in cooling and dampening vibrations of an electronic fuel pump controller which is mounted on the body of a fuel pump, the latter being utilized in an internal combustion engine. The assembly comprises a housing having marginal portions secured to the exterior of the pump body so as to conceal the controller within the housing. A plurality of relatively spaced spacer means are disposed within the housing interior and resiliently retain a non-porous enclosure of the controller in a predetermined spaced relation with the housing interior surfaces. Ports are formed in the housing which communicate with the interior thereof. Gasket means of a resilient non-porous material is provided having an inner section sealingly secured in encompassing relation with a portion of the controller enclosure.

Abstract: An internal combustion engine has opposed cylinders defining a central combustion chamber therebetween. A pair of crankshafts are positioned outwardly of the respective cylinders by a distance which allows the pistons and connecting rods to be withdrawn from the bottoms of the cylinders, when disconnected from the crankshafts, without interference from the crankshafts. The cylinders are inclined to the horizontal and define a substantially V-shaped combustion chamber. The engine is particularly suited for use in vehicles and is provided with a mounting arrangement which promotes pivoting of the engine in the event of a collision rather than projection of the engine through a firewall of the vehicle.

Abstract: The cylinder head and crankcase housing of an internal combustion engine cooperate with a frame, particularly a motorcycle underframe, to form a supporting unit. The internal combustion engine is secured to the underframe by holding members which cooperate with both the cylinder head and the crankcase housing. The cylinder head is disposed in a median plane of the cylinder and a support core is provided inside the cylinder head. This core is used as the point of attachment tie of the cylinder head. The support core is also continued in the crankcase housing. The support core and attachment tie are connected to one another by the interposition of bolts to provide an advantageous rigid engine mounting system.

Abstract: An engine air cleaner and duct arrangement is disclosed for a vehicle for a vehicle having an engine mounted in front therein underneath a hood wherein a vehicle body cross-member extends underneath the hood with clearance space therebetween of smaller height than width and a latch mechanism latches the hood to the cross-member intermediate the ends of the latter. Twin updraft air cleaners each with an inlet and an outlet are mounted on and in front of the cross-member and an air duct is provided having a single delivery branch connected to an air intake of the engine and a pair of feeder branches connected to the respective air cleaner outlets. The feeder branches have a smaller cross-sectional height than width so as to extend through the otherwise unused space between the cross-member and hood and on opposite sides of the latch mechanism and join with the single delivery branch at a location rearward of the cross-member and connect with the air cleaner outlets at locations forward of the cross-member.

Abstract: Disclosed is a carburetor chamber arranged such that its casing having an opening at the top is fixed and this casing is provided, at its interior, with a carburetor and, at its bottom wall, with a path of feeding under pressure chain lubricating oil and, at its rear wall, with a through hole for permitting the passage therethrough of a throttle valve operation lever for the carburetor and, at its front wall, with an attachment section for a gas pipe and, at its opening, with an air filter, whereby the communication of an air-fuel mixture outlet of the carburetor with a suction port of an engine cylinder is effected through the gas pipe so that a connecting of the gas pipe with the suction port of the cylinder may be effected slidably and in a hermetically sealed condition.

Abstract: A longitudinal housing wall for an internal combustion engine is formed with an elongate channel defined by two confronting parallel surfaces. A rod extends in said channel over at least two-thirds of the length of said channel and is coupled to said wall so as to be resiliently movable relative to said wall and capable of absorbing energy of flexural vibration at a predetermined frequency from said wall.

Abstract: An engine driven generator assembly comprises an internal combustion engine, e.g. a diesel engine and a generator driven by the engine, the engine and generator being mounted in a thermally and acoustically insulated housing provided with ports for cooling intake air and exhaust air and an aperture for an exhaust pipe. The engine is mounted in the housing substantially vertically over the generator, the engine having a substantially horizontal crankshaft which is situated substantially in the same vertical plane in which a substantially horizontal generator shaft is situated. A fuel tank for the engine is provided which constitutes at least a part of a wall of the housing to provide lateral stiffening reinforcement therefore. The ports for cooling intake air and exhaust air as well as the aperture for the exhaust pipe are provided in a common housing wall with the intake air port situated below the exhaust air port which in turn is situated below the aperture for receiving the exhaust pipe.

Abstract: A reciprocating internal combustion engine comprises an engine block, which includes cylinders, cylinder heads, pistons, connecting rods, a crankshaft and the mainshaft bearings for the crankshaft. That engine block is held in an outer pan by means of annular supporting elements, which are provided at both ends of the engine block and are coaxial to the crankshaft and insulate against a transmission of structure-borne noise. The engine block is sealed to the upper edge portion of the outer pan only by an oil seal. The outer pan consists of two parts, which are connected by screws. To prolong the service life of the annular supporting elements and to reduce the manufacturing costs, the outer pan has a parting plane which contains the axis of the crankshaft. The supporting elements are secured in the outer pan merely by being clamped between the two parts of the pan.

Abstract: A compact improved four-cycle internal combustion engine of the water-cooled type for use with an outboard motor. The engine includes an exhaust arrangement wherein the exhaust gases are returned from the cylinder head to the cylinder block in proximity to a cooling jacket for cooling the exhaust gases before delivery into the lower unit. In addition, the cooling jacket and method of casting the cylinder head provides an opening in which a sacrificial anode may be placed to protect the engine from corrosion, particularly when operated in salt water. The engine is given a compact arrangement, in part, by positioning the thermostat of the cooling system in the area between the driving and slack sides of the belt that drives the overhead camshaft. The lubricating system also includes a baffled cover plate for the camshaft that receives oil flung from the camshaft and redistributes it to the valve train for lubrication.

Abstract: An internal combustion power pack, comprising a fuel injector assembly, in particular for Diesel engines, which is air cooled, and in which are provided means for feeding and expelling said air to and from said fuel injector assembly which are separate from the remaining part of the ventilation air, and which are freely demountable.

Abstract: The crankshaft of an internal combustion engine for vehicles, especially motorcycles, is mounted between upper and lower parts of a crankcase. The crank webs of the shaft rotate partially in the lower part which is in the form of an oil space. An oil sump is also provided in the lower part at a lower level than the oil space. The lower part of the crankcase has a curved floor formed at a distance from the crank webs, and such floor has one or more oil return ducts therein. The ducts are disposed in the vicinity of the path of movement of the crank webs. The ducts are, in fact, opposite the crank webs and each of the ducts have a slope to them. Each of the ducts extend between walls of bearing seats provided in the engine.

Abstract: The expansion/contraction timing of an actuator chamber is varied in accordance with the sensed engine vibration in a manner as to compensate for the frequency dependent change in pressure transmission characteristics between the chamber of the actuator and the chamber of an engine suspension insulator. This is done by sensing the engine vibration frequency or a parameter which varies in accordance with same (e.g. RPM) and suitably delaying a solenoid or similar electric motor energization signal in accordance with the frequency of the vibration.

Abstract: In a reciprocating piston combustion engine, an insert extends substantially to the plane separating the leading part of the oil pan from the interior of the crankcase. The free longitudinal edge of the insert is disposed above the oil level in the oil pan. Recesses in the insert receive oil that drips down from the crankshaft bearing and directs it back to the oil pan. In view of the close proximity of the recesses with the movement of the crank web, very little oil reaches the insert.

Abstract: A noise reducing cover for use with an internal combustion engine, taking the form of a cylinder head cover, an oil pan, a valley cover, a valve lifter cover or the like, is constructed of a main body portion of a resilient porous material, and an inner skin layer of a resilient non-porous material, securely connected to the inside of the main body portion. The noise reducing cover excludes a hard layer made of metal or hard plastic, thereby suppressing vibration of the noise reducing cover itself even when engine vibration is transmitted thereto.

Abstract: Several embodiments of outer cowling arrangements for outboard motors that provide a silencing air chamber between the forward portion of the engine and an operator of the motor. In addition to providing a sound deadening space, the air chamber functions as a silencing device for the induction system of the engine. In some embodiments, the air chamber is defined by a partition that is affixed to the outer cowling and in other embodiments, this partition is affixed to the engine.

Abstract: An automotive internal combustion engine comprises a cylinder block having a plurality of bearing sections, and a bearing beam structure secured to the bottom part of the cylinder block. The bearing beam structure includes a plurality of main bearing cap sections each of which associates with a respective cylinder block bearing section to rotatably support the journal of a crankshaft. First and second beam sections are formed at the upper corner portions of each bearing cap section to securely connect the bearing cap sections with each other. Additionally, first and second side wall sections are respectively formed along the opposite side portions of each bearing cap section to securely connect the bearing cap sections with each other. The first and second side wall sections are integral with the first and second beam sections, respectively. Therefore, vibration of the bearing beam structure and the cylinder block can be effectively suppressed, thereby achieving total engine noise reduction.

Abstract: A compact engine and blower contained in a portable casing. The engine fuel tank, its inlet port and the closure for the inlet port all are located within the casing, which has a cover openable, for access to the fuel inlet port. The casing cover can be latched closed only when the fuel inlet closure is properly placed on the inlet port.

Abstract: Intake device for multiple cylinder I.C. engine, the intake opening of the carburetor for each cylinder being connected with a carburetor base connected to an air cleaner in chamber form. The chamber intake openings for each carburetor are separated by partition plates.

Abstract: A V-type overhead-camshaft engine comprises first and second banks arranged in V-shape, each bank having a row of a plurality of cylinders extending axially between front and rear ends thereof. The row of the cylinders in the first bank starts from a location spaced apart from the front end of the engine, and terminates at a location near the rear end of the same. The row of the cylinders in the second bank starts from a location near the front end of the engine and terminates at a location spaced apart from the rear end of the same. Each bank is provided with a cylinder head assembly which generally comprises a cylinder head and a head cover, and supports a camshaft.

Abstract: An arrangement for protecting ignition means in an internal combustion engine includes a cylinder head and two longitudinal parallel valve cover banks mounted thereon. Between the valve cover banks there is a longitudinal space for ignition means to the respective combustion chambers of the engine. Such a space and ignition means with their connections located therein are usually subjected to dirt, which reduces the functional reliability of the engine. To eliminate this and to facilitate engine service, the space is formed as a trough with a bottom and two end walls in the cylinder head, the trough being covered by a lid joining on to the valve cover banks and to at least one of its end walls and having at least one opening for ventilation and drainage.

Abstract: A bearing beam structure of an automotive internal combustion engine having a cylinder block formed with bearing sections, consists of a plurality of main bearing cap sections each of which associates with each cylinder block bearing section to rotatably support the journal of a crankshaft. First and second side wall sections are provided to be respectively connected with the opposite side portions of each bearing cap section to securely connect the bearing cap sections with each other. Additionally, the first and second side wall sections are respectively formed with first and second transmission installation sections to which a transmission housing is rigidly connected, thereby greatly improving the rigidity of the cylinder block entire while improving the connection-rigidity between the cylinder block and a transmission.

Abstract: A mounting for interposition between a vibrating system such as an internal combustion engine and a support base such as a vehicle body. The mounting comprises a deformable structure supporting the vibrating system and defining a load transmitting path between the system and the base. An external force is applied to a portion of the deformable structure spaced from the load transmitting path in synchronism with the vibration of the system such that the force exerted by the mounting of the support is substantially constant despite the vibration.

Abstract: A reciprocating internal combustion engine comprises an engine block, which includes the cylinders, cylinder heads, pistons, connecting rods, a crankshaft and main bearings for the crankshaft. The engine block is oiltightly mounted in an outer pan and is held in said outer pan by supporting elements which are provided at both end faces of the engine block and insulate against a transmission of structure-borne sound. The engine block is sealed at the top edge portion of the outer pan only by an oil seal. The supporting elements are coaxial to the crankshaft. To minimize the transmission of vibration to the supporting elements which insulate against the transmission of structure-borne sound, said supporting elements are connected to the engine block by holders, which extend below the cylinders and are secured to the engine block approximately in the middle of the region traversed by the piston heads between their top and bottom dead center positions.

Abstract: A sealing device for a timing belt cover and an engine mount bracket comprises a rib formed on said engine mount bracket and a gasket having a lip of C-shaped section and a fixed portion continuous from said lip. The fixed portion of the gasket is attached to a portion of the timing belt cover surrounding an opening provided in said timing belt cover and said lip of C-shaped section of the gasket is contact with said rib of the engine mount bracket. Since the gasket is made of an elastic material other than sponge, e.g. rubber, it does not undergo a permanent deformation and causes no gap between said lip and said rib. Besides, since said lip of C-shaped section is easily deformed, there is no likelihood of an excessive load being applied to said timing belt cover.

Abstract: Mechanical fastener means for blocking off an opening in an intake manifold gasket when the latter is used with a fuel injected engine. The fastener means includes two mating metal members whose outer edges are oppositely bowed to extend past and confine the oppositely disposed edge portions of the gasket opening therebetween, with one of the members having a central opening formed therein for receiving a "button" extension in the shape of a substantially cylindrical cup formed on the other member and, once extended through the central opening, such button extension being mechanically impacted to be caused to assume a dished shape and a flanged connection with the edge portion of the central opening in the one member.

Abstract: A closed enclosure for a vehicle engine has an air inlet and an air outlet formed at its front and rear ends. Both air inlet and air outlet have sets of sound absorber blades for noiselessly admitting ambient cooling air into the enclosure and for noiselessly exhausting the air therefrom. Disposed horizontally within the enclosure, a first heat insulating partition divides its interior into an engine compartment accommodating the engine and, thereover, a muffler and air cleaner compartment. A second heat insulating partition is mounted vertically on the first partition to subdivide the muffler and air cleaner compartment into a muffler compartment receiving an exhaust muffler assembly and an air cleaner compartment receiving an air cleaner assembly. The engine compartment is open both forwardly and rearwardly for the passage of the cooling air therethrough.

Abstract: An enclosed survival capsule having an automatic allocation system for providing breathing air for its occupants and intake air sufficient to operate a propulsion engine satisfactorily under emergency operating conditions. Air from a compressed air source on board the capsule is allocated between the engine and the crew breathing system. Air exhaled into the cabin by the crew is available through a restricted orifice to provide part of the intake air for the engine. A relief valve on the breathing air portion of the system is operative to insure that sufficient air is available from the cabin to enable the engine to operate at minimal air consumption levels commensurate with power requirements.

Abstract: The engine block of a reciprocating internal combustion engine comprises cylinders, cylinder heads, pistons, connecting rods, a crankshaft, and bearings for said parts. The engine block is mounted in an outer pan in such a manner that the pan is insulated against a transmission of structure-borne sound from the engine block. A frame-shaped flexible seal is disposed between the engine block and the top edge portion of the outer pan and surrounds the engine block. The oil seal extends into grooves which are formed in the top edge portion of the outer pan and in the engine block. To ensure that the oil seal will produce a perfect sealing action in spite of relative motion of the engine block and outer pan and that the oil seal will not render the assembling and disassembling of the engine more difficult, the oil seal consists of fins, which are force-fitted in the grooves, and a thin flexible profiled connecting portion, which connects the fins.

Abstract: The spatially curved oscillator tubes are closely seated on the cylinder head and are partially integrated in that wall of a common intake housing which faces the cylinder head, and are completed by shell halves. The intake system preferably includes injection molded synthetic material, and is fastened on the cylinder head by an aluminum fastening rail or strip, or includes reinforced synthetic material, and is fastened directly on the cylinder head. An air-filter element can be installed as a part of the intake housing.

Abstract: A bearing beam structure is secured to a cylinder block of an internal combustion engine and includes a plurality of main bearing cap sections each of which associates with each bearing section of the cylinder block so as to rotatably support a crankshaft. At least a beam section is rigidly connected to the lower end portion of each bearing cap section to securely connect all the bearing cap sections with each other. Additionally, first and second side wall sections are rigidly connected to the opposite side portions of each bearing cap section to securely connect all the bearing cap sections with each other. Accordingly, the bearing beam structure is improved in rigidity to suppress various vibrations of the cylinder block, thereby effectively achieving total engine noise reduction.

Abstract: An air filter in front of the intake opening of the carburetor has an elastic lower surface (20) with a bead (19) which is movable in the intake opening. The displacement is adjusted by means of a choke control (22) which at maximum deflection presses the whole bead into the intake opening.

Abstract: An internal combustion engine has an engine unit support, comprising such und-carrying parts as cylinders, cylinder head, pistons, piston rods, crankshaft bearings, and crankshaft, which is provided, at least at the output end thereof with a bracket of at least two arms which bracket is attached to the crankshaft bearing seats and is provided with at least one sound-insulating element on each end. At least some of the sound-insulating elements carry inner sleeves acting as setting elements whose axial position relative to outer sleeves thereof may be adjusted even after the engine unit support has been mounted in the crankcase. In this simple manner the sound-insulating elements may be provided with any desired pre-stressing, which will help to achieve optimum sound-insulation.

Abstract: In generator apparatus for the combined production of electrical energy and heat, of the type comprising a support casing housing an internal combustion engine with an air filter the inlet of which communicates with an aperture in a side wall of the casing, an electrical machine coupled to the engine, and electronic circuits for controlling the operation of the engine and the electrical machine, a covering and protecting element is fixable sealingly and removably to the outer surface of the side wall of the casing to define a region between the element and the wall. The electronic circuits are supported by at least one plate fixed to the outer surface of the side wall in the region between the wall and the covering and protecting element, and the element has at least one aperture through which this region communicates with the exterior. In operation of the apparatus, the electronic circuits are ventilated by air which is drawn in by the engine and flows into the region through said at least one aperture.

Abstract: A cylinder cover being connected to a fan cover, covering the top section of a cylinder. The cylinder cover covering the cylinder of an engine has an opening section at a position close to the fan cover. The opening section of the cylinder cover is covered by a freely removable cover section being secured to the cylinder cover.

Abstract: A housing cover for closing and sealing an opening of a housing from which a shaft-like member projects, comprises a main body having an aperture through which the shaft-like member is adapted to pass, a first elastomer seal vulcanized to the main body about the aperture for sealingly cooperating with the shaft-like member, a second elastomer seal vulcanized to the main body at a distance from and in a different plane than the first elastomer seal for sealingly cooperating with the housing and elastomer sealing elements connecting the first and second elastomer seals with one another.

Abstract: An engine cover is disclosed which replaces the conventional cover generally found on small internal combustion engines. The cover is preferably made of clear Lexan.TM. plastic and is designed to withstand the forces and heat generated by normal engine operation. The cover preferably includes as an integral part thereof a main bearing with heat sinking an auxiliary bearing and an oil fill port.

Abstract: An engine block includes a crankshaft, and is enclosed by a sheath. Sealing elements connect the sheath to the engine block and insulate against structure-borne sound. A flywheel is non-rotatably connected to the crankshaft at one end of the engine block. A power train housing is disposed at that end of the engine block and includes a flywheel housing which accommodates the flywheel. The flywheel housing is rigid with the engine block and forms a unit therewith. The sheath encloses the engine block on all sides and defines an oil chamber around the engine block. The sealing elements consist of rings provided at opposite ends of the engine block. The unit is carried by and connected to a support by elastic elements which insulate against structure-borne sound.

Abstract: A front cover for covering gears and a belt located in the vicinity of the front surface of an automotive engine body, the front cover being made of a soft material which is high in vibration-damping capacity and sticked on the front surface of the engine body, thereby effectively suppressing the vibration of the front cover itself though engine vibration is transmitted thereto, and completely protecting the gears and belt from foreign substances.

Abstract: An internal combustion engine comprises a cylinder block including a skirt section, and a plurality of bearing sections connected to the skirt section; and a bearing beam structure secured to the bottom part of the cylinder block and including a plurality of main bearing cap sections each associating with each cylinder block bearing section to rotatably support a crankshaft, first and second beam sections disposed to connect the main bearing cap sections with each other, and first and second side wall sections disposed to securely connect the bearing cap sections with each other respectively at their one of opposite side portions and at the other one of the opposite side portions, each side wall section being securely connected at its lower part with each beam section and the its top part with the lower part of the cylinder block skirt section, thereby greatly improving the rigidity of the entire bearing beam structure, thereby effectively suppressing noise emission from the cylinder block.

Abstract: In order to improve in a simple manner the ventilation of a water-cooled internal combustion engine having a sound-absorbing cover, a suction device is provided at the air inlet opening of the cover, the suction device containing a suction port in the low pressure area of the radiator/fan assembly. By specific placement of several air inlet openings a variety of cooling requirements may be met.

Abstract: An internal combustion engine comprises a cylinder block rigidly connected to a transmission and having cylinder bores and bearing sections; and a bearing beam structure including main bearing cap sections each associating with each cylinder block bearing section to rotatably support a crankshaft, first and second beam sections securely connecting the main bearing cap sections with each other and extending parallelly with the crankshaft axis, the first and second beam sections being located spaced from each other and along the respective opposite side portions of each bearing cap section, and first and second connecting sections respectively integral with the first and second beam sections and being rigidly connected to the transmission, thereby preventing the bearing beam structure from its axial vibration while contributing to an improvement in rigidity of a power unit entire including the transmission.

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: In order to avoid the danger of overheating the separate exhaust jacket of a water-cooled internal combustion engine with a sound-absorbing cover whose enclosed space contains air inlet and outlet openings sealed against the penetration of sound, and is ventilated by cooling air during operation of the engine, and which has a separate exhaust jacket with air ducts of its own-with a radiator cooling fan being placed outside of the cover in the vicinity of a cover wall serving as a radial deflector for the outgoing air from the fan, and with the exhaust jacket leading substantially upwards from its outlet to its inlet opening-after the engine has been switched off and the forced ventilation has thus come to a standstill, the air inlet opening leading into the exhaust jacket is connected to the topmost part of this jacket and is positioned such as to be exposed to the flow of outgoing air from the fan.

Abstract: An internal combustion engine comprises a cylinder block having a plurality of cylinder barrels and a plurality of bearing sections for the journals of a crankshaft; a bearing beam structure and including a plurality of main bearing cap sections each of which associates with each cylinder block bearing section to form a bore for rotatably receiving the crankshaft journal, each bearing cap section being formed with first and second projections which are spaced from each other and located opposite to each other with respect to the axis of the bore, and first and second beam members which are independent from but securely connected to the first and second bearing cap section projections, respectively, by bolts, thereby greatly reducing engine noise emission and improving the productivity of the engine.

Abstract: A slosh baffle for selective and retroactive installation in the oil pan of an in-line internal combustion engine for automotive vehicles, the slosh baffle being attachable to the rim of the oil suction strainer by snap-action assembly, its transverse orientation being determined by means of a saddle portion on the slosh baffle which engages an elbow of the oil suction line. Attachment to the strainer rim is obtained by means of several downwardly depending flexible snap hooks on the periphery of a supporting flange of the slosh baffle, in cooperation with separate centering lugs.

Abstract: A constrained-layer construction comprising a stiff layer or substrate and a layer of a viscoelastic polymer which is the reaction product of (a) 25 to 75 weight percent of an acryloyl or methacryloyl derivative of at least one oligomer, said oligomer having a glass transition temperature of less than 25.degree. C. and a molecular weight per oligomer of 600 to 20,000, and (b) 75 to 25 weight percent of a copolymerizable monomer whose homopolymer has a glass transition temperature of at least 50.degree. C., the copolymer being suitable for damping vibrations at relatively high temperatures, e.g., 50.degree.-150.degree. C., is disclosed. Also included is a process for damping vibrations in component parts of devices used in automotive, aerospace, and computer industries.

Abstract: An automotive internal combustion engine comprises a cylinder block formed at its bottom section with a plurality of main bearing carrying sections, a plurality of main bearing caps respectively secured to the main bearing carrying sections, and a beam member formed of a sheet metal and disposed to rigidly connect all the main bearing caps, thereby effectively suppressing the vibration of the main bearing caps to greatly decrease engine noise emission.