Abstract: An automotive internal combustion engine comprises an engine main body including a cylinder head having intake ports, and a cylinder head cover. Fuel injector valves are disposed to be directed respectively to the intake ports. An intake manifold is installed to a side surface of the cylinder head and outward curved to define a space between the intake manifold and the cylinder head. A blow-by gas recirculation system is provided for feeding blow-by gas introduced out of the cylinder head cover to each cylinder of the engine main body through an intake system. The blow-by gas recirculation system includes a blow-by gas piping which extends from the cylinder head cover to the intake ports for the cylinders. The blow-by gas piping is accommodated within the space defined between the intake manifold and the cylinder head.

Abstract: An intake device (1) for an internal combustion engine including a main body (2) and cover element (3; 20) which are securely connected to one another. Main body (2) and cover element (3) form intake pipes (4, 5, 6, 7) of in intake manifold. The cover element (3; 20) includes a plurality of individual shells (14, 15, 16, 17; 24, 25, 26, 27), which are connected to one another. Each individual shell (14, 15, 16, 17; 24, 25, 26, 27) forms a wall section of a respective intake pipe (4, 5, 6, 7) of the intake device (1). A flexible connection element (22) is arranged between two successively adjacent individual shells (25, 26) to compensate for tolerances between the cover element (3) and the main body (2).

Abstract: A resin intake manifold is provided with two separated bodies manufactured by connecting protrusions of weld portions of the separated bodies to each other in accordance with a vibration welding, and a cover wall in which one of the weld portions is arranged in an inner side or an outer side of the protrusion with leaving space with the protrusion.

Abstract: An intake manifold includes a manifold body and a joint. The joint is made of metal and includes an upstream-side portion and a downstream-side portion that are joined to each other. The upstream-side portion is joined to a manifold body on the upstream-side of the manifold body. The downstream-side portion is joined to the manifold on the downstream-side of the manifold.

Abstract: In a intake system of a combustion engine, surface irregularities in the form of raised parts (8) or depressions (7) are created, at predetermined points, in the wall surfaces of a suction pipe or the surfaces of a flap arranged in such a suction pipe, in order to avoid burbling and eddying in these areas.

Abstract: The manufacturing method for the air intake apparatus has a holding-portion forming step, a temporarily fixing step, and a joining step. In the holding-portion forming step, a holding portion is formed. In the temporarily fixing step, the porous member is held by the holding portion. In the joining step, the holding portion and the porous member are joined together. Thus, an air intake apparatus, in which the opening is reliably covered with the porous member, can be manufactured. In the air intake apparatus manufactured by this manufacturing method, a peripheral portion of the porous member is doubly sealed with the holding portion that is an outer edge part of the opening. Consequently, the opening is reliably covered with the porous member, so that intake noise is reliably reduced.

Abstract: A single piece intake manifold having a core and a seal. Material of the seal and material of the core are intermixed to bond the core to the seal. The core is a plastic material such as a polyamide and/or a thermoplastic material. The seal is rubber, plastic or a thermoplastic elastomer. A method for manufacture the intake manifold includes providing a two-piece casting mold, one piece having walls configured to receive a liquefied core material and another piece having walls configured to receive a liquefied seal material. The liquefied seal material is introduced into the mold, and, separately therefrom, the liquefied core material is introduced into the casting mold. When the seal material and the core material are combined in the casting mold, they are both unhardened, or at least partially un-hardened. Heat is applied to the core material and the seal material after such materials are introduced into the mold. Intake manifold made of plastic and method for manufacturing it.

Abstract: Preferred embodiments of an air-fuel module include a manifold and a valve group subassembly. The manifold has a fuel supply passage, at least one air supply passage, and at least one power group subassembly defining a chamber in communication with the fuel supply passage and the at least one air supply passage. The fuel supply passage extends generally along a first axis. The at least one air supply passage extends between a common air inlet and respective air outlets along a second axis A2 generally orthogonal to the first axis. The valve group subassembly extends along a valve axis between a valve inlet and a valve outlet. The valve group subassembly is adapted to be inserted into the chamber through the respective air outlets. In an alternate embodiment, the power group subassembly is formed separately from the manifold so that the power group subassembly can be inserted into a recess formed in the manifold.

Abstract: A resin intake manifold includes a chamber section having an intake port which leads to a throttle body 91, and a plurality of pipe sections 7 which connect interior of the chamber section to cylinders of a multi-cylinder internal combustion engine. The chamber section is made up of a plurality of port members 1 coupled together, each port member 1 including the pipe section 7 and a cylindrical section 6 whose external wall is connected to an end of the pipe section 7.

Abstract: The present invention relates to an intake manifold or distributor for an air feed circuit for an internal-combustion engine comprising, on the one hand, an intake or plenum chamber of elongate shape and provided at one of its longitudinal ends with an intake aperture and, on the other hand, at least two pipes laterally connected to said chamber, said pipes extending at least partially around said intake chamber from their inlet apertures opening therein and having a curved structure over at least a portion of their length.

Abstract: A fuel module carrier assembly mounted between an intake manifold and an internal combustion engine includes an electrical lead, coil assemblies, fuel modules, fuel module seals, a molded carrier and runner seals. The fuel module carrier assembly retains and protects the electric fuel module components.

Abstract: An improved intake manifold valve system for use in a vehicle engine and method of assembly therein. The intake manifold valve system includes a valve housing defining an axis. The valve housing includes a first end and an opposite second end. The first end has an opening formed therein. The opening defines a first axial length. The intake manifold valve system includes a valve shaft assembly disposed in the valve housing. The valve shaft assembly includes a shaft having at least one valve provided thereon. The shaft includes a first end and an opposite second end. The second end has with an extended portion. The extended portion defines a second axial length that is greater than the first axial length of the opening. When the extended portion of the shaft is positioned in the opening, the extended portion is movable axially within the opening. At the same time, the extended portion is operative to operatively support the shaft relative to the valve housing.

Abstract: An intake manifold (10) includes an integral fuel rail (14) at least partially surrounded by a volume (22). The volume (22), being adjacent the fuel rail (14), minimizes the permeation of fuel out of the fuel rail (14). The volume (22) is also utilizable as a sealed storage space to contain an air induction component (26) to more effectively utilize the packaging space of the intake manifold (10).

Abstract: An intake manifold (10) includes a fuel rail cavity (30) which receives a metallic fuel rail (14) enclosed by a molded fuel rail cavity cover (32). The fuel rail (14) communicates with each of a plurality of engine cylinders (16) through a fuel module (18). An injector cup (28) fits upon each module cylinder to provide an interface between the fuel module and the fuel rail. Another intake manifold (10) includes a fuel rail (14) which directly interfaces with each fuel module (18) through a bellows (38) attached directly thereto.

Abstract: The present invention relates to an intake manifold or distributor for a thermal engine constituted by at least two parts (1, 1′) assembled together, in particular two parts made from thermoplastic material assembled by vibration welding and comprising an intake or plenum chamber connected, for fluidic communication, to intake pipes opening into the chamber. Intake manifold or distributor for a thermal engine characterized in that it comprises an additional attached piece (4) comprised, on the one hand, of a main body forming a support and fitting plate and, on the other hand, of pipe portions (6, 6′) produced in one piece with said body (5) and defining at least the inlet orifices (6, 6′) of said pipes (3), said attached piece (4) being positioned and, if applicable, fixed, prior to assembly of said at least two parts (1, 1′) forming said manifold or distributor on or in one of these parts.

Abstract: A composite air intake manifold assembly adapted for use with an internal combustion engine includes an upper half shell formed from a polymer, a lower half shell formed from a polymer and joined to the upper half shell to define a housing having an internal cavity, and a one piece inner shell formed from a polymer and disposed within the cavity. The one piece inner shell in combination with the upper half shell and the lower half shell cooperate to define at least a pair of spaced apart air intake runners. Each of the runners includes an opened air intake end adapted to receive atmospheric air, and an opened air inlet end adapted to be connected to an associated air inlet side of a cylinder head of the internal combustion engine.

Abstract: An engine intake manifold assembly (10), including a first component (12) having a first mating surface (14) and a second molded plastic component (16) having a second mating surface (18). The second molded plastic component (16) is adhesively bonded to the first component (12) with an adhesive (20). The adhesive bond strength exceeds the strength of the second molded plastic component (16).

Abstract: Methods, constructions, and systems for treating engine emissions. An engine having a crankcase includes air intake, blow-by vent, and exhaust port; the crankcase emits blow-by gases through the blow-by vent and produces an exhaust stream through the exhaust port. The blow-by gases are directed through a blow-by filter to produce filtered gases. The filtered gases are directed back into the air intake of the crankcase; and the exhaust stream is treated with a catalyst arrangement. Total emissions of a turbo-charged diesel engine having an engine crankcase and an exhaust tailpipe are reducible. The total emissions includes particulate matter matter emissions from the engine crankcase added to the particulate matter emissions from the exhaust tailpipe.

Abstract: An intermediate flange system for an internal combustion engine with direct fuel injection. The intermediate flange system is mounted between the intake device and the cylinder head and includes two subunits (10, 11). The first subunit includes a basic body (12) and is responsible for conducting the fuel. The other subunit includes a basic body (13) and serves to conduct the intake air. Both basic bodies can be optimally designed as a function of demands to which they are subjected. Thus, basic body (13) is preferably made of synthetic resin material, and basic body (12) of aluminum. Consequently, the overall intermediate flange system is lighter than prior art systems, which heretofore have been made entirely of aluminum.

Abstract: An intake duct 1 is provided, particularly for taking air in an internal combustion engine, notably the engine of an automobile. Said duct includes a first wall 2 made of a porous material, wherein a film 4 is implemented which is sufficiently thin for avoiding any incidence upon the acoustical characteristics, having notably a surface mass of less than 100 grams per square meter. Said film 4 is fixed onto said porous wall 2 such that at least 50% of the surface of said film facing said porous wall 2 is not fixed thereto.

Abstract: A co-injection molded air intake manifold shell comprises an inner and outer skin layer separated by a sound absorbing or sound insulation core. Each skin layer is composed of a polyamide resin which, optionally, contains glass fiber reinforcement and high specific gravity fillers such as barium sulfate or tungsten. The sound insulating core is composed of a high density material having a foam structure, such as a polyamide resin. Skin layers are provided with a plurality of pockets to permit distribution of localized lumped masses at predetermined locations tailored to increase noise transmission losses. A single layer air intake manifold shell having non-uniform thickness is also provided. The thickness of the single layer air intake manifold shell is larger over preselected noise sources of larger amplitude to maximize noise attenuation for a nominal air intake manifold shell thickness.

Abstract: A pipe mechanism for an exhaust gas recirculation system includes a joint pipe connected to an exhaust pipe, an inner tube through which flows exhaust gas, and an outer tube. The inner tube has an upstream end and a downstream end, with the downstream end being located in the intake pipe. The outer tube has an upstream end connected with the joint pipe and a downstream end attached on the outer surface of the inner tube. The outer tube is located around the inner tube with a predetermined clearance between the inner and outer tubes.

Abstract: An integrated control and fuel delivery system having an intake manifold that receives a portion of an airflow and delivers air to an engine and a fuel spacer that receives the air from the intake manifold. The fuel spacer includes a wiring harness. A control module is disposed on the fuel spacer adjacent to the intake manifold of the engine.

Abstract: An improved air intake manifold for a V-style internal combustion engine comprising three individual injection molded sections joined by friction welding of flanged mating elements. Each section is formed of a high-melting temperature composite polymer. The welds are all on the exterior of the manifold. The mating surfaces are formed to be directly accessible to welding apparatus and are so oriented that friction welding may be carried out by relative motion between the components in the axial direction. When joined, the lower and middle sections form the individual air distribution runners from the plenum to the intake ports in the engine heads. The lower and middle sections are so configured that each such runner crosses the valley of the engine, providing great strength and rigidity to the module. All runners are identical, so that air flows from the plenum to the individual cylinders are substantially identical.

Abstract: An intake manifold (10) includes a fuel rail cavity (30) which receives a metallic fuel rail (14) enclosed by a molded fuel rail cavity cover (32). The fuel rail (14) communicates with each of a plurality of engine cylinders (16) through a fuel module (18). An injector cup (28) fits upon each module cylinder to provide an interface between the fuel module and the fuel rail. Another intake manifold (10) includes a fuel rail (14) which directly interfaces with each fuel module (18) through a bellows (38) attached directly thereto.

Abstract: A fuel module carrier assembly mounted between an intake manifold and an internal combustion engine includes an electrical lead, coil assemblies, fuel modules, fuel module seals, a molded carrier and runner seals. The fuel module carrier assembly retains and protects the electrical fuel module components. The electrical lead is molded or assembled into the carrier such that the intake manifold is separate from any metallic or wire components which heretofore were molded directly therein. In one carrier assembly, the fuel modules are inserted into the carrier from the lower or engine. Another carrier assembly receives fuel modules which are plugged into fuel module openings. Another carrier assembly includes an electrical lead having a plurality of connectors each of which receives a fuel module assembly having a fuel module and a mating module connector.

Abstract: An intake manifold (10) includes an integral fuel rail (14) at least partially surrounded by a volume (22). The volume (22), being adjacent the fuel rail (14), minimizes the permeation of fuel out of the fuel rail (14). The volume (22) is also utilizable as a sealed storage space to contain an air induction component (24) to more effectively utilize the packaging space of the intake manifold (10).

Abstract: An intake pipe (10) for an internal combustion engine composed of shells (11a, 11b) in which the geometry of the joining surfaces (19) adopts an approximately stepped course in areas with a slight incline relative to to joining force (F). This produces areas with a greater or lesser inclination relative to a joint line (16) indicating the average inclination of the joining surfaces. This results in areas which can be welded with a high degree of stability because of their considerable incline towards the joining force. These areas can then support areas which are less inclined towards the joining force. This allows the shells (11a, 11b) to have strongly curved joining surfaces, which increases the geometric design freedom of the intake pipe and, in particular, makes it possible to manufacture intake pipes with strongly curved intake channels constructed from just two shells.

Abstract: An air intake system which includes a first member, a second member connected to the first member for forming an air intake passage for introducing an intake air from an upstream mechanism of an engine to cylinders of the engine, a first convex portion provided on either one of the first member or the second member, and a groove portion for forming a clearance by engaging with the convex portion on the other of the second member or the first member. The liquid sealing agent is charged into the clearance.

Abstract: A connecting piece (1) is disposed between a carburetor (4) and an inlet channel (3) in an internal combustion engine (2) of a portable handheld motor-driven work apparatus such as a motor-driven chain saw, cutoff machine or the like. The connecting piece functions to compensate for relative position changes between the engine (2) and the carburetor (4). The connecting piece (1) is made of elastic material and includes an expansion fold (5) for compensating for changes in position. The length of the expansion fold (5) is changeable from a collapsed to an expanded length. The expansion fold (5) subdivides the connecting piece (1) into a carburetor-end channel section (6) and an engine-end channel section (7). The carburetor-end channel section (6) has a circularly-shaped cross section and the engine-end channel section (7) has a cross section departing from the circular form at the end facing toward the engine (2).

Abstract: An arrangement for the detachable fixing of an inlet device to the cylinder head of an internal combustion engine (6) wherein the inlet device (6) is fixed to the cylinder head (2) by means of a locking mechanism (10), which permits a simple assembly without the need for separate connector elements.

Abstract: A carburetor is supported on a casing by the air-fuel mixture discharging port thereof and by the portion of the adjustment screws thereof. A first vibration isolating member is interposed between the casing and the air-fuel mixture discharging port, and a second vibration isolating member is interposed between the casing and the adjustment screws. These vibration preventing members prevent the direction transmission of the vibration of the casing to the carburetor side. A reasonable and compact carburetor support structure can be provided because the air-fuel mixture discharging port and the adjustment screws are intrinsically provided with the carburetor itself.

Abstract: A resin intake manifold includes a chamber section having an intake port which leads to a throttle body 91, and a plurality of pipe sections 7 which connect interior of the chamber section to cylinders of a multi-cylinder internal combustion engine. The chamber section is made up of a plurality of port members 1 coupled together, each port member 1 including the pipe section 7 and a cylindrical section 6 whose external wall is connected to an end of the pipe section 7.

Abstract: An intake manifold includes a manifold body and a joint. The joint is made of metal and includes an upstream-side portion and a downstream-side portion that are joined to each other. The upstream-side portion is joined to a manifold body on the upstream-side of the manifold body. The downstream-side portion is joined to the manifold on the downstream-side of the manifold.

Abstract: A resin intake manifold includes a chamber section 12 having an intake air inlet pipe 11, and a plurality of outlet pipes 13 which connect cylinders 32 of an internal combustion engine to the chamber section 12. The resin intake manifold is made by coupling half-parts 21A and 21B of divided halves of the chamber section 12 and the outlet pipes 13 divided along a direction of the pipe axis. The outlet pipes 13 are connected to the chamber section 12 so that the external wall of the outlet pipes 13 on the side of an end 13b is integral with the external wall of the chamber section 12. Further, the outlet pipes 12 extend from the chamber section 12 along a direction of the pipe axis, and are curved to extend in a direction away from the chamber section 12 with a curve angle in a range of not smaller than 90° and not larger than 180°, and continuously extend away from the chamber section 12.

Abstract: A noise insulation structure of a synthetic resin made conduit includes a synthetic resin made chamber and a rubber made noise insulation member. Since the chamber is closely covered around with the noise insulation member through projections and grooves formed on the contact surface of the chamber with the noise insulation member. Further, cylindrical blind-end bores are provided on the inner surface of the noise insulation member so as to form air columns when the noise insulation member is installed on the chamber. The air columns serve as resonators to muffle noise.

Abstract: An intake device (1) for an internal combustion engine including a main body (2) and cover element (3; 20) which are securely connected to one another. Main body (2) and cover element (3) form intake pipes (4, 5, 6, 7) of in intake manifold. The cover element (3; 20) includes a plurality of individual shells (14, 15, 16, 17; 24, 25, 26, 27), which are connected to one another. Each individual shell (14, 15, 16, 17; 24, 25, 26, 27) forms a wall section of a respective intake pipe (4, 5, 6, 7) of the intake device (1). A flexible connection element (22) is arranged between two successively adjacent individual shells (25, 26) to compensate for tolerances between the cover element (3) and the main body (2).

Abstract: The present invention relates to a component for an internal combustion engine of an automobile having reduced NVH properties. The component has a shell formed with a plastic composite material. The shell defines an inlet port, an outlet port, an outer surface and an inner surface. The inner surface defines an inner cavity to allow air passage to the internal combustion engine. A damping layer is disposed on the outer surface such that damping layer substantially dampens the noise emitted from the component.

Abstract: In an intake manifold, a resin intake air introduction portion has a semicircular lower intake pipe, a volume chamber and joints provided in the volume chamber at opposite sides and along an axis of the lower intake pipe. An aluminum intake air distribution portion has a semicircular upper intake pipe, which is combined with the lower intake conduit to constitute an intake conduit, and distribution pipes extending alternately in opposite directions so as to cross an axis of the upper intake pipe. The aluminum intake air distribution portion overlaps the resin intake air introduction portion on a side opposite to the engine. Each end of the distribution pipes is connected to the joints and each another end thereof is fixed to the engine. The lower intake pipe is provided in an axial center thereof with a communication bore through which intake air is supplied from the intake conduit via the volume chamber, the joints and the distribution pipes to the engine.

Abstract: An intake manifold is molded of two plastic parts. A first main manifold body provides the outer cover and an inner opening. A second runner provides a plurality of entry ports for communicating air to cylinders within the engine. In the past, it has been somewhat difficult to control the shape of the entry ports when the manifold was molded of a single part. The use of the separate runner allows the provision of a relatively thin and easily molded part such that the entry ports can be closely controlled and an idealized design can be achieved.

Abstract: The invention describes a plastic embodiment for a suction system, whereby various configurations of said embodiment can be produced at low cost. According to the invention, a modular structured suction system is created. Said system comprises a plastic air distributor module which can be connected to an air feed pertaining to an internal combustion engine; several plastic, single-pieced suction pipe modules, whereby one end of the suction pipes is joined to the air distributor module and the suction pipes are respectively allocated to a combustion chamber of the internal combustion engine; in addition to at least one plastic single-pieced flange module that is connected to the other end of the suction pipe of at least one suction pipe module and which can be secured to the internal combustion engine.

Abstract: An intake device for an internal combustion engine, comprising welded shells joined along a partition line, in which the partition line is provided with a region for producing inclined additional surfaces, which generate a transverse force Q2 due to their inclination relative to a pressure force D applied for welding the shells. This transverse force Q2 offsets a transverse force Q1 which is generated as a result of the inclination of partial regions of the partition line relative to the applied pressure force D. In this way, the transverse forces which arise during production of the intake device may be at least partially offset in the component, so that little or no forces are exerted on the molding tools, and the welding results for the intake pipe may thus be improved.

Abstract: The invention relates to a piston engine comprising an engine block that contains several cylinders. The inventive piston engine also comprises a fresh-gas supply device that is provided with several supply pipes (1) which are arranged on the cylinders and are fixed to the engine block. Said piston engine further comprises a fuel injection system that is provided with a high-pressure supply line (5) which is allocated to the cylinders. The aim of the invention is to fix the supply pipes (1) and the high-pressure supply line (5) to the engine block in a simpler manner. Holding-down clamps (7) for the supply pipes (1) are configured on the high-pressure supply line (5) in such a way that the high-pressure supply line (5) fixes the supply pipes (1) to the engine block.

Abstract: An improved air intake manifold for a V-style internal combustion engine comprising three individual injection molded sections joined by friction welding of flanged mating elements. Each section is formed of a high-melting temperature composite polymer. The welds are all on the exterior of the manifold. The mating surfaces are formed to be directly accessible to welding apparatus and are so oriented that friction welding may be carried out by relative motion between the components in the axial direction. When joined, the lower and middle sections form the individual air distribution runners from the plenum to the intake ports in the engine heads. The lower and middle sections are so configured that each such runner crosses the valley of the engine, providing great strength and rigidity to the module. All runners are identical, so that air flows from the plenum to the individual cylinders are substantially identical.

Abstract: An intake device has a flange, at which it can be attached to a flange of a cylinder head. Intake pipes are furthermore provided, which are configured as at least two inlet ducts per cylinder. At least in the region of the flange of the intake device, the free cross section of at least one of the intake ducts in each case is capable of being closed by a flap. The flange and the flap with a shaft and a bearing are formed in such a way that the flap can be introduced with the shaft and the bearing in front of that side of the flange that faces the cylinder head.

Abstract: An engine intake manifold assembly (10), including a first component (12) having a first mating surface (14) and a second molded plastic component (16) having a second mating surface (18). The second molded plastic component (16) is adhesively bonded to the first component (12) with an adhesive (20). The adhesive bond strength exceeds the strength of the second molded plastic component (16).

Abstract: A composite air intake manifold assembly adapted for use with an internal combustion engine includes an upper half shell formed from a polymer, a lower half shell formed from a polymer and joined to the upper half shell to define a housing having an internal cavity, and a one piece inner shell formed from a polymer and disposed within the cavity. The one piece inner shell in combination with the upper half shell and the lower half shell cooperate to define at least a pair of spaced apart air intake runners. Each of the runners includes an opened air intake end adapted to receive atmospheric air, and an opened air inlet end adapted to be connected to an associated air inlet side of a cylinder head of the internal combustion engine.

Abstract: An air-intake manifold includes a plurality of air-intake pipes connecting between a collector and an air-intake pipe mount. Each air-intake pipe 3 is bent to have a predetermined shape. Each air-intake pipe 3 is fabricated by bending a substantially straight double metal pipe that has an outer pipe 3a and an inner pipe 3b with a clearance 3c therebetween equal to or less than 0.2 mm, such that the outer pipe 3a and the inner pipe 3b locally contact with each other at an intermediate region. Accordingly, while the outer pipe 3a and the inner pipe 3b of the air-intake pipe 3 locally contact with each other at the contact point 3e (in the relatively slidable relationship), an air layer having a thickness equal to or less than about 0.2 mm is formed between the outer pipe 3a and the inner pipe 3b at portions except for the contact point 3e.

Abstract: At least a part of a duct wall of a suction duct is formed out of a molded body of non-woven fabric. The non-woven fabric contains a thermoplastic resin binder.

Abstract: An acoustic suppression arrangement 7 for a component undergoing induced vibration is provided. The arrangement 7 includes a component body 8 having an interior surface 9 and an exterior surface 11 having a panel portion 20. A containment plate 24 is provided having a spaced relationship from the panel portion. A first projector 25 is connected to the component body panel portion 20 and extends toward the containment plate 24. A second projector 30 is connected to the containment plate. A connector system 39, 45 is provided to connect the containment plate 24 to the component body 8 while placing the first and second projectors 25, 30 in an interference fit. Vibratory energy of the component body 8 is dissipated by frictional contact between the projectors 25, 30.