Abstract: In the case of an internal combustion engine (1) arranged transversely in a motor vehicle and having in-line cylinders, the exhaust gases are passed forwards in the direction of travel around the internal combustion engine from that side of the latter which is opposite to the direction of travel and, from there, pass to a catalytic converter (8) arranged in the rear area of the motor vehicle. To ensure rapid heating of the catalytic converter when cold-starting, the exhaust manifold (2) of the internal combustion engine is connected to the inlet of the catalytic converter (8) by a short feed line (5) with a small cross section. An exhaust-gas recirculation line (15) which opens into line (4) close to the catalytic converter is provided.

Abstract: A pipe assembly includes an inner pipe and an outer laminated pipe disposed around the inner pipe for use in conveying exhaust gases from an internal combustion engine. The outer pipe is formed from two or more laminated layers to reduce noise emission. The outer pipe surrounds the inner pipe to protect the inner pipe, and muffle the inner pipe, while the inner pipe provides support for the outer pipe, either consistently contacting the outer pipe at the upstream inlet portion, or contacting the outer pipe at three areas spaced from each other on the outer pipe at the downstream outlet portion. The three contacting areas at the downstream outlet portion create an air-filled space at least partially separating the inner pipe and the outer laminated pipe. The air-filled space insulates the inner pipe so that exhaust gases moving through the inner pipe do not cool significantly as a result of heat dissipating by conduction or convection to the outer pipe.

Abstract: An exhaust pipe assembly for a multi-cylinder internal combustion engine is made up of a plurality of exhaust pipes made of steel whose upstream ends are connected to a flange provided for connection to a cylinder head, a collecting case to which downstream ends of the exhaust pipes are connected, and a coupling flange interposed between the exhaust pipes and the collecting case. The coupling flange is made of a thin steel plate and has upward burred portions which are circular in shape and into which respective downstream ends of the exhaust pipes are separately inserted for welding with the burred portions, and a downward bent portion whose peripheral edge portion is fitted onto an upper outside end portion of the collecting case for welding with the bent portion.

Abstract: An exhaust manifold for an internal combustion engine includes a set of exhaust manifold conduits. Pairs of the exhaust manifold conduits converge and are joined at their downstream portions. The pairs of exhaust manifold conduits are connected to associated downstream exhaust pipes. In each pair, a first exhaust manifold conduit having a first downstream portion extends into the exhaust pipe, and a second exhaust manifold conduit having a second downstream portion terminates at the inlet end of the exhaust pipe. A channel is defined by the body of the exhaust pipe and the flat side wall of the first downstream portion. The channel has a cross-sectional configuration approximately the size and shape of the second downstream portion and communicates with the second downstream portion. Each exhaust manifold conduit includes an inner pipe disposed within an outer pipe for reduced thermal dissipation to promote a quicker light-off of the catalytic converter.

Abstract: A horizontally-opposed type engine for a motorcycle, in which a pair of left and right cylinder heads are connected to a pair of left and right cylinder blocks in such a manner that combustion chambers are formed between each of the cylinder blocks containing a plurality of cylinder bores disposed in parallel with the axial lines thereof extending substantially in the horizontal direction and pistons slidably fitted in the cylinder bores; a crank shaft is disposed in such a manner as to be perpendicular to the axial lines of the cylinder bores; and the engine is mounted on the motorcycle with the axial line of the crank shaft extending in the longitudinal direction, wherein the restriction to the bank angle of the motorcycle given by the exhaust pipes is made small and thereby the bank angle is easily ensured.

Abstract: A front exhaust pipe is connected to a front engine block, and a rear exhaust pipe is connected to a rear engine block. The front exhaust pipe extends from the front engine block downward, and curves and extends rearward. The rear exhaust pipe includes an upstream portion extending downward from a rear portion of the engine and a downstream portion extending forward from a lower end of the upstream portion and curving rearward. Rear ends of the front and rear exhaust pipes are joined together and connected to a main exhaust pipe. The rear and front exhaust pipe have substantially the same length. Therefore, vibration due to a difference between natural frequencies of front and rear exhaust pipes is reduced, and sound vibration performance is enhanced. Further, a declination of output due to disorder of exhaust pulsation in the confluence portion of the front and rear exhaust pipes is avoided.

Abstract: A knuckle joint 18 for the exhaust system of an internal combustion engine comprises first and second pipe segments 20, 22, the second pipe segment having an outwardly deformed end portion 24 which enters with clearance into a flared end portion 26 of the first pipe segment. There is a flange 32 on the first pipe segment and a flange 34 on the second pipe segment. A plurality of circumferentially spaced bolts 36 pass through corresponding holes in the flanges, there being a nut 40 on each of the bolts. On each bolt there is a coil spring 38 between the flanges, and a coil spring 42 between the flange 32 and the nut.

Abstract: An improved apparatus for withstanding the high temperatures in the exhaust assembly of an internal combustion engine. A quilted insulating element is extended about a liner of a manifold or port liner. The liner in this invention is preferably ceramic. After assembling the insulating element about the liner, a metallic ring is installed for support during casting. A metallic housing, preferably cast iron, can then be cast around the liner, insulating element, and metallic ring.

Abstract: The invention concerns an exhaust silencer arrangement with a transverse exhaust silencer in a four-chamber type of construction, in particular for very small passenger-transporting motor vehicles, with a 3-cylinder rear-mounted engine and an exhaust gas turbocharger. The silencer comprises a housing which is composed of two half shells and accommodates a catalyst module in an integrated manner. The catalyst module, which does not have its own housing, forms a silencer system partition which divides the silencer into a 3-pot main chamber and an additional chamber which is in particular a resonator chamber and communicates with the main chamber via connection ducts formed in the half-shell housing.

Abstract: An exhaust manifold M is comprised of a plurality of inner exhaust pipe shells secured to an upper flange, and a plurality of outer exhaust pipe shells secured to the upper flange to individually cover the inner exhaust pipe shells, wherein a downstream end of each of the corresponding inner exhaust pipe shells slidably contacts an annular bead bulging from an outer peripheral surface of the downstream end of the outer exhaust pipe shells. An inner collecting pipe shell communicates with the plurality of inner exhaust pipe shells and is secured at its upstream end to the plurality of outer exhaust pipe shells, and an outer collecting pipe shell which is secured at its upstream end to the plurality of outer exhaust pipe shells covers the inner collecting pipe shell. A downstream end of the inner collecting pipe shell slidably contacts an annular mesh member interposed therebetween.

Abstract: A flange for attaching an exhaust manifold to an engine block. The flange having two layers of sheet metal plates accurately connected to each other and having openings which are aligned with the cylinder outlets of the engine block, and attachment openings which are placed on stay bolts on the engine block. The flange includes at least two flange portions, whereby the plates of adjacent flange portions overlap in the area at least of one attachment opening. The contact surfaces can have a slide coating in the overlap area.

Abstract: A flexible tube for an automobile exhaust system which has a bellow assembly to absorb the first exhaust pipe and the second exhaust pipe for the an exhaust system having a cylindrical outer cover (5) made of plate to cover the outer periphery of the bellows (3)1 the first collar (7') and the second collar (7") with the risers (7a', 7a") bent toward the inner surface (5a) of the outer cover (5); the first elongation displacement stopper member (6') and the second elongation member displacement stopper member (6") respectively formed by bending the inner side of the outer cover (5); and the first elastic stopper member (8') and the second elastic stopper member (8") provided at the risers (7a', 7a") of both collars (7', 7"). As a further modification, the second outer cover (9) may be provided inside of the outer cover (5) to form displacement stoppers (9a, 9b) by bending the both end portions of the second outer cover.

Abstract: A heat-resistant, thermally insulative, ductile port liner for a head of an internal combustion (IC) engine having a tube-shaped structure formed from at least one layer of fiber reinforced ceramic matrix composite (FRCMC) material. The FRCMC material includes a polymer-derived ceramic resin in its ceramic form and fibers. In a first embodiment of the port liner, the tube-shaped structure has one FRCMC layer forming the sole, solid wall of the structure. Whereas, in a second embodiment, the tube-shaped structure has two FRCMC layers forming inner and outer walls of the structure, respectively, with an intervening space separating the inner and outer walls. The intervening space is sealed at both ends It can be filled with a thermally insulating material, evacuated and held at substantially a vacuum pressure, or filled with a gas. Once the port liner has been formed, it is preferably cast-in-place when the metal head of the IC engine is formed.

Abstract: 05267372An exhaust manifold includes a curved end portion and at least two T-shaped portions connected to the curved portion through sliding fits, wherein the end portion and the T-shaped portions each are provided with a flange connection and a pipe connection, and wherein each T-shaped portion has a sliding fit connection piece. Each sliding fit connection piece is shaped by internal high pressure shaping at the outer radius of a curved section of the T-shaped portion.

Abstract: An exhaust manifold for an internal combustion engine includes one or more pairs of pipe members. Each pipe member has a downstream end portion, and includes along its downstream end portion a side wall in opposing relation with, and concave with respect to, the side wall of the other pipe member of the pair. The pipe members are joined at only two contacting areas of their respective downstream end portions. A gap is defined by the opposing concave side walls in which the side walls expand and contract while heating and cooling. Each of the pair of pipe members includes an outer pipe and an inner pipe disposed within the outer pipe. The inner pipe contacts the outer pipe at three contacting areas that are spaced from each other on the outer pipe so that an air-filled space at least partially separates the inner pipe and the outer pipe. Exhaust gases from the internal combustion engine are conveyed through such pairs of pipe members downstream to one or more exhaust pipes.

Abstract: An aircraft construction having an aircraft engine and an engine nacelle having a wall housing the engine. A cowl door is provided in the wall of the nacelle providing access to the engine to service it. An exhaust duct extends from the engine through the cowl door. The exhaust duct has a first duct section with an outlet end extending from the engine toward the cowl door with its outlet end adjacent the cowl door. The exhaust duct includes a second, separate duct section, having an inlet end, mounted in the cowl door and movable with the cowl door. The inlet end of the second duct section is located adjacent the outlet end of the first duct section, when the cowl door is closed, to have the first and second duct sections together directing exhaust from the engine out of the nacelle. When the cowl door is opened to service the engine, the second duct section moves away with the door making it easier to service the engine.

Abstract: An exhaust manifold comprising a plurality of exhaust pipes and a merging portion applies exhaust gas from each cylinder uniformly to an oxygen sensor in a merging portion at low speed thereby improving the durability of the oxygen sensor. A downstream forward end of each exhaust pipe of the exhaust manifold, when connected to an inlet wall of a merging case having the oxygen sensor mounted on a side thereof, is formed in the shape of a bell mouth for leading the exhaust gas to the oxygen sensor. Each exhaust pipe is fixedly welded to the merging case at a position upstream of the forward end of the bell mouth. An angle formed by lines perpendicular to tangential lines at starting and ending points of a curved portion of the bell mouth at the forward end of the exhaust pipe is set in the range of 45.degree. to 75.degree.. As a result, the bell mouth spreads over the whole interior of the merging case and reduces a flow rate of the exhaust gas, and part of the exhaust gas flows toward the oxygen sensor.

Abstract: An exhaust manifold has inner and outer tubes made of stainless steel and welded to flanges provided at inlet ports of the exhaust manifold, from which exhaust gas discharged from an engine enters the exhaust manifold. The inner tube has flat portions, and shield plates disposed within the inner tube protect the flat portions from being directly vibrated by pressure waves of the exhaust gas. Accordingly, the vibration of the flat portions is lowered, so that high frequency noise from the exhaust manifold is reduced.

Abstract: A manifold converter apparatus comprising a manifold housing including a plurality of inlets wherein each inlet of the plurality of inlets is mounted immediately adjacent an internal combustion engine exhaust port and a plurality of lead pipes wherein each lead pipe of the plurality of lead pipes provides an exhaust gas flow passage between one of the inlets and a manifold plenum and at least one catalyst coated substrate located within at least one of the inlets between at least one of the exhaust ports and one of the lead pipes. An advantage achieved includes quick light-off of the manifold converter apparatus after cold start of the vehicle engine.

Abstract: An exhaust manifold and a turbine housing for a turbo-charged five-cylinder engine are cast as a single piece. This arrangement renders unnecessary a flanged connection between a separate exhaust manifold and turbine housing. The one-piece design provides optimum gas paths to obtain a good response.

Abstract: An exhaust manifold seal arrangement to eliminate oil slobber comprises a counter bore in cylinder head exhaust ducts, a spiral wound gasket with chevron shaped ends and a barrel shaped portion disposed between the chevron shaped ends being disposed in the counter bore to form a leak proof seal between the cylinder head and the exhaust manifold and a thermal liner between the exhaust gases and the counter bore, the exhaust manifold being made in three parts with a spiral wound gasket being disposed between the parts to form a leak proof seal between the parts.

Abstract: A double U shaped exhaust pipe having varying internal pipe diameters for increasing horsepower, designed within internal combustion engine vehicle racing or other rules that limit such features as overall size. A first stage portion of the exhaust pipe produces a first periodic flow of exhaust, with a vacuum pulse created where the pipe internal diameter increases upon the exhaust reaching a second stage portion. A third stage portion of the exhaust pipe produces a third stage periodic flow of exhaust upon the exhaust reaching an increased pipe internal diameter at a fourth stage portion. These periodic pulsed flows are matched to the opening of the intake and exhaust valves of the engine for a selected engine speed range. The matching of a vacuum pulse to the opening exhaust valve improves engine performance by drawing exhaust gases from the engine.

Abstract: In an arrangement for interconnecting two exhaust pipe sections of a motor vehicle exhaust system with a vibration dampening structure disposed between the two pipe sections, a first one of the pipe sections has a coupling member radially extending therefrom and the second pipe section has a coupling structure connected to the coupling member in a circumferentially elastic fashion so as to permit limited relative rotation between the two pipe sections.

Abstract: An insulation blanket is applied around the exhaust manifold of an internal combustion engine to maintain higher exhaust gas temperature in the manifold, thus both to enhance oxidation of unburned hydrocarbons therein and also to reduce ambient air contact with the exterior of the manifold to reduce passive formation of NO.sub.x.

Abstract: A collector is disclosed for the primary pipes of an exhaust manifold in an internal combustion engine. The collector includes a common cavity and a plurality of primary pipes having a first cross-sectional area at their outlet ends and second cross-sectional area at an upstream location, the first cross-sectional area being less than the second cross-sectional area, with the primary pipes being in direct contact with the common cavity of the collector and further arranged to include a single central pipe with the remainder of the pipes spaced around the central pipe, with the outlet of the central pipe being formed as a conically tapering portion and the outer wall of the central pipe forming part of the inner wall of the remainder of the pipe.

Abstract: An exhaust manifold assembly for use with an internal combustion engine includes a segmented exhaust manifold with a first segment and a second segment. The first segment has an inlet end for connection with the internal combustion engine and an outlet end. The second segment has an inlet end for connection with the internal combustion engine and an additional inlet end connected with the outlet end of the first segment. An exhaust connector is connected between the outlet end of the first segment and the additional inlet end of the second segment. The exhaust connector includes an inner tubular element, an outer tubular element and a bellows. The outer tubular element is positioned radially around the inner tubular element. The bellows engages the inner tubular element and biases the inner tubular element against the first segment or the second segment. The bellows also engages the outer tubular element and biases the outer tubular element against the other of the first segment or the second segment.

Abstract: An exhaust manifold made of plate metal in which sufficient strength and rigidity can be ensured, lightening of the weight is intended by making walls thin as a whole, and early activation of a catalyst is easy. The exhaust manifold is one for a multi-cylinder internal combustion engine having two groups of cylinders selected so that exhaust strokes are not successive. The exhaust manifold includes two exhaust pipe sections containing exhaust pipes communicating with the cylinders of one of the groups respectively, confluence sections where the exhaust pipes in each of the exhaust pipe sections join respectively, and a gathering section where the confluence sections join.

Abstract: In order to reduce the exhaust gas emissions of automotive vehicle combustion engines including exhaust gas catalytic converters, the exhaust gases are caused to flow between the engine and the catalytic converter through conduit branches of different thermal caracteristics. Said conduit branches comprise a full load tube and a partial load tube, with the full load tube surrounding the partial load tube so as to provide an annular space between the full load tube and the partial load tube.

Abstract: An exhaust manifold assembly including a one-point junction type exhaust manifold, whereby the occurrence of exhaust interference is prevented by a large capacity portion formed at a junction of the branch pipes. The large capacity portion has a capacity larger than the capacity of each branch pipe. Both torque and output can be improved, the size of the exhaust manifold can be reduced, and layout restrictions can be eliminated. The exhaust manifold assembly includes an exhaust manifold attached to the internal combustion engine, the internal combustion engine having a plurality of cylinders, and a manifold cover disposed to shut out heat and sound from the exhaust manifold.

Abstract: In a transverse-mounted cylinder-in-line internal combustion engine (1) fitted in a motor vehicle, the exhaust gases from the side of the internal combustion engine opposite to the direction of travel are led forwardly round the internal combustion engine and from there reach an NOx trap (8) arranged in the middle region of the vehicle. For rapid heating up on cold starting the three-way converter (12) is arranged immediately after the exhaust manifold (2), and in addition when a valve (9) is closed the exhaust gases are led through a short supply duct (5) directly to an exhaust duct (13) which opens into an NOx trap.

Abstract: A heat-resistant, thermally insulative, ductile turbocharger housing for an internal combustion engine having a structure comprised at least partially of fiber reinforced ceramic matrix composite (FRCMC) material. The FRCMC material includes a polymer-derived ceramic resin in its ceramic form and fibers. The material, being for the most part ceramic, provides the heat-resistance and thermal insulating capabilities of the FRCMC material, while the fibers produce a desired degree of ductility in the FRCMC material.

Abstract: An exhaust after-treatment system for treating an exhaust stream from an internal combustion engine of an automotive vehicle includes first and second exhaust treatment devices in a parallel path, continuous flow, flow rate sensitive exhaust temperature modification circuit for conducting exhaust gases from the first treatment device to the second exhaust treatment device.

Abstract: The catalytic converter configuration for exhaust systems of motor vehicles, in particular Otto engines, conducts the exhaust (at least in portions thereof) in two or more separate systems. Each system is provided with at least one catalytic converter with axial flow passages. The catalytic converters are combined into a shared monolith for the two systems which is provided with a partition at one or both of the end faces. The partition divides the cross section of the shell and it is positioned so close to the face of the honeycomb body as to be virtually seal-tight.

Abstract: A motorcycle exhaust system, which can prevent the generation of noise by vibrations and interference of an exhaust pipe heat insulating cover and a muffler heat insulating cover for protecting exhaust pipes and a muffler. Exhaust pipes and a muffler are protected by an exhaust pipe heat insulating cover and a muffler heat insulating cover, and confronting ends of the covers and are joined via an elastic member.

Abstract: An exhaust system is provided for a motor vehicle having a V-type internal combustion engine forming two banks of cylinders. The exhaust system includes first and second exhaust manifolds, the first manifold connected to the first cylinder bank and the second manifold connected to second cylinder bank. A pair of catalytic converters communicate exhaust from the exhaust manifolds. An exhaust pipe communicates exhaust from each manifold. The first exhaust pipe extends from a first side of the vehicle to a second side of the vehicle. The second exhaust extends from the second side of the vehicle first side of the vehicle. A NOx trap receives exhaust from the second exhaust pipe. A third exhaust pipe communicates exhaust between the first catalytic converter and the NOx trap. The third exhaust pipe does not extend to the second side of the vehicle. A control valve selectively blocks exhaust flow through the first pipe to direct the exhaust through the third exhaust pipe.

Abstract: A heat-insulating, light and vibration-proof exhaust manifold for a multi-cylinder internal combustion engine is provided. The exhaust manifold comprises an upper stream flange, a lower stream flange, four manifold pipes at an upper stream, a manifold chamber (gathering section) at a lower stream and a manifold case of a plate metal covering the manifold pipes and the manifold chamber. The manifold pipes have upper stream ends to be connected to exhaust ports of the internal combustion engine through the upper stream flange and lower stream ends gathering in the manifold chamber. Upper stream ends of the manifold pipes and the manifold case are welded to the upper stream flange, and lower stream ends of the manifold chamber and the manifold case are welded to the lower stream flange. The manifold pipe and the manifold chamber can slide relatively at a slide portion which is maintained by pressing the manifold chamber and the manifold case against the manifold pipe.

Abstract: An internal combustion engine of the type utilized to power an outboard motor and having a cooling arrangement for reducing the transmission of heat from exhaust gases flowing through an exhaust passage from the engine to the combustion chambers of the engine, is disclosed. In general, the cooling arrangement comprises an air-filled space formed in the cylinder block between the combustion chambers and the exhaust passage. In a first arrangement, when the engine is of the in-line variety and the combustion chambers are vertically arranged, air spaces are formed between a common vertically extending exhaust passage leading to an exhaust pipe, and each combustion chamber. In a second arrangement, when the engine is of the "V" type, an air space is formed in the portion of the cylinder block defining the inside wall of each cylinder bank, between each combustion chamber and a common exhaust passage extending through the valley between the cylinder banks.

Abstract: A method of forming a breakage resistant, erosion resistant ceramic liner for a part comprising the steps of, forming a liner of a ceramic material containing pores; filling the pores with a pre-ceramic polymer resin; and, firing the liner saturated with a pre-ceramic polymer resin at a temperature and for a time which converts the resin into a ceramic within the pores. The liner can be mechanically attached, adhesively bonded or, a metal part can be cast onto the liner by placing the liner within the metal casting mold for the part as a sidewall or integral element thereof. The invention also includes method for producing parts and liners of fiber reinforced ceramic matrix composite by a resin transfer molding process or the like wherein fiber preforms are saturated with liquid pre-ceramic polymer resin. The preforms are then polymerized in a mold, the part removed from the mold, and then fired to transform the polymer to ceramic. The process can also be employed to form hollow parts such as manifolds.

Abstract: An exhaust header system for an internal combustion engine having improved exhaust gas flow characteristics. Primary pipes extend from openings in a flange bolted to the engines exhaust ports. The primary pipes come together at a collector pipe into which the primary pipes extend slightly. The ends of the primary pipes are substantially parallel, uniformly spaced around the collector pipe axis and have end surfaces lying substantially in a single plane. A generally pyramidal transition piece has a base corresponding to, and secured to, the primary pile end surfaces so as to cover the area between the pipe ends. The pyramid apex extends along the collector pipe centerline toward the exit end. The length and cross section of the transition piece is selected to provide a smooth transition from the greater combined internal cross section of the primary pipe ends to the lesser cross section of the collector pipe exit end.

Abstract: A catalytic converter having a catalytic core element comprising a rigid, foam-like, metallic material having interconnecting walls defining an open pattern of interconnected pores which join together to form irregular passages extending through the catalytic core element. The catalytic core element may be configured for placement within the exhaust manifold or exhaust pipe of an internal combustion engine or within a separate housing. The catalytic core element may be configured such that exhaust flow through the catalytic core element may be radial through the lateral portion of the catalytic core element and axial through the end of the catalytic core element.

Abstract: A cast iron exhaust manifold having an inside surface covered with a ceramic coating comprising, by weight, about 30% to about 70% unfused silica, about 5% to about 30% magnesia, about 5% to about 20% alumina and about 3% to about 10% sodium oxide. The coating will preferably be built up in multiple layers at least one of which is relatively porous and another is relatively dense resulting from vacuum degassing of the slurry used to deposit the coating.

Abstract: An exhaust manifold 10 is adapted for being mounted between a cylinder head and an exhaust pipe and has a plurality of branch pipes 12, 14, 16, 18 arranged in the longitudinal direction of the cylinder head. The exhaust manifold 10 also has a confluence 20 placed downstream the branch pipes 12, 14, 16, 18. The branch pipes 12, 14, 16, 18 join the confluence 20 which has a plurality of junctions 22, 24, 26. Each junction is formed with two adjoining branch pipes and provided with a cylinder head side portion 28, 30, 32 facing toward the cylinder head. The thickness of each cylinder head side portion is larger than the thicknesses of portions excluding the cylinder head side portions in the exhaust manifold, and the thickness 36 of the cylinder head side portion 30 arranged in the middle of the longitudinal direction of the cylinder head is the largest in the thicknesses 36, 38 of all of the cylinder head side portions 28, 30, 32.

Abstract: A thermal management system for catalytic converters of an automotive internal combustion engine includes exhaust pipes from one bank of cylinders crossing over to a second side of the engine to a catalytic converter, while the exhaust pipe from the other bank of cylinders crosses over to the first side of the engine to connect to a corresponding catalytic converter, thereby resulting in a crosswise pattern of exhaust flow. Bypass pipes connect between the exhaust pipes of one bank of cylinders directly to the catalytic converter located on the same side of the engine to provide a short exhaust path to rapidly heat the converter.

Abstract: In a turbocharger and exhaust gas manifold arrangement on a multi-cylinder internal combustion engine comprising an exhaust gas manifold with an exhaust gas collection chamber having a discharge flange connected to a connecting flange of an exhaust gas turbocharger, the discharge flange and, accordingly, the turbocharger are arranged at a longitudinal end of the exhaust gas manifold adjacent the front end of the engine.

Abstract: An improved exhaust system for an internal combustion gasoline-and/or diesel-fueled engine includes an engine exhaust manifold which has been fabricated from carbon-carbon composite materials in operative association with an exhaust pipe ducting which has been fabricated from carbon-carbon composite materials. When compared to conventional steel, cast iron, or ceramic-lined iron parts, the use of carbon-carbon composite exhaust-gas manifolds and exhaust pipe ducting reduces the overall weight of the engine, which allows for improved acceleration and fuel efficiency; permits operation at higher temperatures without a loss of strength; reduces the "through-the wall" heat loss, which increases engine cycle and turbocharger efficiency and ensures faster "light-off" of catalytic converters; and, with an optional thermal reactor, reduces emission of major pollutants, i.e. hydrocarbons and carbon monoxide.

Abstract: A vehicle includes an internal combustion engine and an improved exhaust system including an exhaust pipe connected to the internal combustion engine and a flexible hose connected to the exhaust pipe and to an emission control device. A clamp assembly connects ends of the exhaust pipe and the flexible hose and includes a gasket received within a band subassembly.

Abstract: An exhaust manifold A that embodies the invention in one preferred form includes a double-wall structure 3 consisting of an inner shell IS and an outer shell OS. The double-wall structure has a substantially straight body portion 1, three branches 16 projecting downward from the body portion 1, and a curved tail portion 15. Each shell comprises half shells 1A and 1B that are mechanically interlocked at their edges 1c. Also the branches 16 are mechanically interlocked with a flange coupling 4. In addition, an outlet coupling 5 is mechanically interlocked with the tail portion 15.

Abstract: An exhaust gas collecting and cleaning device for a multi-cylinder engine comprising an exhaust-gas manifold (1) constructed as a casting and an exhaust-gas cleaning device (5) mounted near the engine, attached to the exhaust-gas manifold (1) and comprising a housing (6) and at least one exhaust-gas cleaning element (14) bedded therein. A tubular section (12), which is constructed as a sheet-metal part and projects from the casting, is cast into the exhaust-gas manifold (1) at the outlet end region thereof. To this there is joined a downstream segment of the housing (6) of the exhaust-gas cleaning device (5). According to an independent embodiment, a downstream exhaust-gas guide element (such as a corrugated pipe) instead of the exhaust-gas cleaning device is joined in corresponding manner to the exhaust-gas manifold constructed as a casting.

Abstract: An exhaust system for an outboard motor powered by an internal combustion engine is disclosed. Preferably, the engine is of the "V"-type, having first and second banks defined by first and second cylinder heads connected to a cylinder block. Each bank contains at least one combustion chamber, and the banks define a valley extending therebetween along a length of the engine. A main exhaust passage is defined through each cylinder head generally within the valley, and an exhaust passage extends from each combustion chamber of a bank to the main exhaust passage of that bank. The main exhaust passages of the two banks join into a single passage.

Abstract: This invention discloses an exhaust manifold for an engine made of all fiber reinforced ceramic matrix composite material so as to be light weight and high temperature resistant.