Abstract: A manifold exhaust processor includes a pair of substrates mounted within the interior of an exhaust manifold housing and aligned in end-to-end relation to permit each substrate to treat the combustion product exhausted from a different group of engine cylinders and to equalize the temperatures of the outer skin and centerline portion of the substrate to reduce thermal stress. A common outlet is provided to exhaust the treated combustion product. The first substrate is mounted in a first chamber of the manifold housing in close proximity to a first inlet to cause combustion product to be introduced into the first chamber in a direction toward a side wall of the first substrate to promote tangential flow about the side wall and around the substrate.

Abstract: A motor vehicle having a transversely disposed V-type engine with first and second exhaust manifolds associated with the forward and rearward cylinder banks, respectively. An exhaust pipe interconnects both of the exhaust manifolds with a single rearwardly positioned catalytic converter and an auxiliary catalytic converter is positioned in the exhaust pipe so that only the exhaust gases from the forwardmost exhaust manifold pass through it.

Abstract: An exhaust system for an internal combustion engine, the system having a particulate trap for trapping particulate emissions. A catalyst is incorporated and exposed to the exhaust gas flow to promote burning off the trap particulate material. The catalyst is incorporated as a solid material insert which is fitted in the exhaust gas system upstream of the particulate trap so that the hot exhaust gases pass over the insert on their way to the trap. In passing over the insert, the hot exhaust gases cause catalytic material to be vaporized from the surface of the insert and to be carried along in a gas stream towards the trap where they assist in promoting burning of the particulates.

Abstract: A filter for treating a particulate containing exhaust gas stream being discharged from an internal combustion engine. The filter includes a compressible bed through which the exhaust gas flows, said bed being comprised of a mass of randomly disposed metallic fibers which define particulate retaining flow passages. The bed is formed with at least one segment being compressed to a greater density than other similar segments whereby to effect a desired gas flow path through the respective bed segments, and a more uniform distribution.

Abstract: Filter for removing combustible particulate matter from a diesel exhaust gas stream, prior to said stream being discharged into the atmosphere. The filter includes a reinforced bed formed of a frangible filter media comprised of a mass of randomly disposed fibers. The fibrous mass is provided with a bed support member that affords the fibrous mass added physical strength, but also serves to direct hotter exhaust gases toward the peripheral cover parts of the filter casing.

Abstract: A catalytic converter for treating engine exhaust gas includes a carrier and a casing housing the carrier. The carrier has opposite first and second ends and is formed therethrough with a plurality of passageways extending from the first to the second end of the carrier. The passageways have opposite first and second ends respectively. The first ends of the passageways are at the first end of the carrier. The second ends of the passageways are at the second end of the carrier. The casing and the second end of the carrier define a space, inside the casing, through which the second ends of the passageways communicate in common. An inlet tube is connected to the casing in such a manner as to directly communicate with a part of the first ends of the passageways, in order to supply the engine exhaust gas thereto. An outlet tube is connected to the casing in such a manner as to directly communicate with another part of the first ends of the passageways.

Abstract: A catalytic converter for treating exhaust gases includes a carrier and a casing. The carrier has an axis with respect to its contour and is of honeycomb structure. The carrier is made of metal and has catalyst on its surfaces. The casing houses the carrier. The casing is made of metal having a coefficient of thermal expansion relatively close to that of the metal constituting the carrier. The carrier has a tapered outer-surface which is oblique with respect to the axis of the carrier. The casing has a tapered inner-surface which matches the tapered surface of the carrier. The tapered surfaces of the carrier and the casing are substantially in contact with each other so that the casing may axially secure the carrier.

Abstract: An elongate catalytic muffler of the radial flow type for purifying the exhaust gases of an internal combustion engine, comprises a tubular casing having a gas inlet at one end and a gas outlet at the other end. Two co-axial substantially parallel frustra-conical grids of decreasing cross-section from the inlet end to the outlet end of the muffler define, with cup-like end walls, a catalyst chamber compression means is provided for axially displacing one of said end walls towards the other, so as to compress the catalyst mass in said chamber, and with said compression means being protected by tight separating means from the action of the exhaust gases treated in the muffler.

Abstract: A system for collecting and catalytically cleaning exhaust gases from an engine which is particularly suited for an arrangement wherein the catalyst is in close proximity to the exhaust ports of the engine. Exhaust pipes are employed having common walls extending longitudinally therethrough to separate and convey exhaust gases from two separate cylinders to a common manifold. The manifold is arranged to provide a mixing of the exhaust from a plurality of cylinders and to direct that homogeneous flow to the catalyst. A restriction is provided at the outlet of the manifold chamber and before an expansion chamber into the catalyst. This outlet and the expansion chamber are designed to provide maximum efficiency in distribution of gases to the catalyst and also provide minimum gas flow disruption and back pressure.

Abstract: An exhaust system for a multi-cylinder internal combustion engine comprises a catalytic converter having a monolithic catalyst, and an exhaust manifold having branch runners and a branch runner gathering section to which the catalytic converter is directly connected, the extensions of the axes of the branch runners meet a plane containing the inlet end surface of the catalyst at separate and different points, respectively, thereby uniformly supplying exhaust gas onto the entire inlet end surface of the catalyst.

Abstract: A thin-walled exhaust gas manifold casting structure for an internal combustion engine is disclosed. The manifold is comprised of nodular iron and has walls defining a plurality of inlet ducts interconnecting with a shallow elliptical outlet duct, the walls having a generally uniform thickness in the range of 0.12-0.15 inches. An integrally cast rib extends across at least a plurality of inlet ducts to reduce thermal flexing in service. The rib, subsequent to casting, is bored to define a hollow cylinder having ports communicating with most of the inlet ducts for carrying a secondary air supply.

Abstract: A catalytic converter includes ring-shaped cushion members of differing bulk densities at each axial end of a catalyzer carrier, a first cushion member which is supported by a casing of the converter being of lesser bulk density than that of a second cushion member which is interposed between said first cushion member and the adjacent axial end of said catalyzer carrier.

Abstract: An exhaust gas purification apparatus for an internal combustion engine including a catalyst chamber containing a catalyst composition for the catalytic conversion of harmful substances contained in the exhaust gases wherein the interior wall of the exhaust pipe connecting the engine with the catalyst chamber is provided with a catalytically active coating for at least a portion of its length.

Abstract: A filter adapted to connect to an internal combustion engine in relatively close proximity to the engine. The filter will receive a stream of hot exhaust gas immediately as the latter passes from the engine's combustion chambers. The gas then passes through a filter bed disposed within a manifold system incorporated into the filter. The filter bed includes means for stabilizing the temperature thereof within a desired range, regardless of the operating condition of the engine, and the temperature of exhaust gas.

Abstract: An exhaust-gas purifier comprising a monolithic catalyst which is disposed in an exhaust passage of an engine proper provided with a plurality of cylinders, and which has a plurality of paths running in the direction of the exhaust-gas stream, wherein the exhaust passage is divided into a plurality of passageways opening close to the upstream end of the monolithic catalyst, the passageways being independent from each other or combined with proper others so as to form compound passageways. The part of the independent exhaust passageways corresponding to each cylinder or compound passageways is extended to the downstream end of the monolithic catalyst, substantially separated from each other, thus lowering the interference of each cylinder due to fluctuation of the exhaust pressure exerting adverse effects on each other.

Abstract: A frit of the following approximate analysis in percent by weight______________________________________ Alumina Al.sub.2 O.sub.3 8 to 12 Boron trioxide B.sub.2 O.sub.3 40 to 60 Sodium monoxide Na.sub.2 O 6 to 14 Lead monoxide PbO 0 to 7 Calcium oxide CaO 6 to 11 Barium oxide BaO 7 to 12 Manganese oxide MnO 2 to 6 Cobalt oxide CoO 0 to 2 Silica SiO.sub.2 Under 1 ______________________________________when admixed with other materials, in parts by weight as follows ______________________________________ frit 30 to 60 aluminum powder 5 to 60 silicon powder 0 to 8 chromium trioxide 0 to 10 zirconium silicate 0 to 10 copper oxide 0 to 3 bentonite 0.5 to 3 water 70 to 80 ______________________________________applied to an iron-based part, and then fired at 800.degree. to 950.degree. C. results in a heat-resistant weldable enamel. It is especially suited for automobile engine mufflers.

Abstract: A ceramic honeycomb composite structure adapted to be used as a catalyst support comprises a ceramic honeycomb body and ceramic layers integrally provided thereon having surfaces including therein microscopic holes, a sum of volumes of the holes 5 microns or more being at least 0.1 cm.sup.3 /g to ensure a sufficient catalyst-supporting property and achieve a high mechanical strength of the structure. On the layers of the structure are provided active material layers onto which a catalytic component is applied to enable it to be used as a catalyst. A ceramic material is extruded through a die to form the ceramic honeycomb body to which is applied ceramic grains and then the body with the grains is dried and sintered to complete the composite structure.

Abstract: An internal combustion engine has at least one outlet passage for exhausting the burned gases, terminating at the exterior surface of the engine, and, alternatively, connectable to the afterburning device or to a by-pass line by-passing the afterburning device. A control regulated as a function of temperature is provided to direct the burned gases through the by-pass line at high temperature and through the afterburning device at low temperature.

Abstract: The exhaust gas purification device includes an exhaust manifold, a purification cylinder connected with the exhaust manifold through a first honey-comb shaped catalyst, and a second honey-comb shaped catalyst positioned at the rear portion of the purification cylinder. Each catalyst is supported by steel wool rings including coarse and dense portions of steel wool. The purification device further includes a secondary air supplying arrangement.

Abstract: A catalytic converter apparatus for reducing pollutants from an engine having a plurality of cylinders. The converter apparatus has an upper casing for mounting on the engine and branch pipes extending to the engine and through which exhaust gas discharged from the respective cylinders in the engine is led. A lower casing is connected to the upper casing for forming an exhaust manifold in cooperation with the upper casing. The lower casing has a discharge port for the exhaust gas. A catalyst casing is disposed within the exhaust manifold and has a support member extending therefrom and held between abutting surfaces of the upper and lower casings. Bolts are inserted through the casings from above the upper casing for coupling the upper and lower casings to each other and clamping the support member therebetween.

Abstract: An exhaust purifying system for a multi-cylinder four-cycle internal combustion engine operating on an intake mixture leaner than stoichiometric employs first preliminary reaction chambers receiving exhaust gases from ports connected to cylinders having successive firing order. The exhaust gases are then delivered from said first preliminary reaction chambers to a single second preliminary reaction chamber and then to a catalytic reaction chamber containing oxidative catalysts of base metals, and then finally to an oxidative reaction chamber. The intake mixture for the engine is heated from exhaust gases in the oxidative reaction chamber. This particular succession of chambers causes the temperature of the exhaust gases to increase to above 800.degree. C.

Abstract: Disclosed is an internal combustion engine for an automobile having at least one cylinder associated with a primary intake system and another cylinder or cylinders associated with a secondary intake system. Each of the primary and secondary intake systems comprises a choke valve, a throttle valve and a carburetor. The engine includes a throttle valve controlling device adapted for operation in response to a negative pressure fluctuating according to the degree of opening of the throttle valve in the secondary intake system for maintaining the throttle valve in the secondary intake system in the vicinity of its idling position when the throttle valve in the primary intake system is in the vicinity of its idling position and opening fully the throttle valve in the secondary intake system when the throttle valve in the primary intake system is far away from its idling position.

Abstract: A catalyst container for use in an exhaust manifold, which container includes perforated inner and outer cylinders and is positioned within the exhaust manifold, in the position of its exit, with catalysts filled in a cylindrical space defined between the inner cylinder and outer cylinder. In this catalyst container, annular openings in the cylindrical space at its top and bottom ends are covered with annular upper and lower lids, respectively, while a circular, inner cylinder lid is placed over the top opening of the inner cylinder to cover it. In addition, an outer cylinder lid is placed on the top circumferential edge of the outer cylinder in a manner to cover the top opening of the outer cylinder as well as the circular, inner cylinder lid. The catalysts are filled in a first space defined by the inner cylinder lid and the outer cylinder lid as well as in a second space defined between the outer cylinder and the inner cylinder.

Abstract: A catalytic device takes the form of a manifold connectible to the engine block of an internal combustion engine to receive the exhaust gases. The manifold has an outer jacket for receiving coolant, e.g., water, and within this jacket is provided a chamber containing a catalyst cartridge serving to treat the exhaust gases to remove carbon monoxide therefrom. The cartridge is replaceable and has a pipe at one end which forms an exhaust pipe and a tubular projection into which the gases are passed. The cartridge is spaced from the inner surface of the chamber wall and is thermally insulated therefrom.

Abstract: This specification discloses an exhaust gas cleaning device which is intended for removing harmful substances from exhaust gases of internal combustion engine, especially for removing carbon particles or the like.The device has a body accomodating a filter element adapted to catch the particles in the exhaust gases. The device is attached to the engine as if it were an exhaust manifold so that the clogging particles are conveniently burned by hot gases, whereby the filter element is conveniently recovered.

Abstract: Internal combustion engine exhaust gas muffler and purifier with segmented hollow shell and removable middle segment, said shell having an upstream exhaust gas expansion chamber, a downstream sound-absorbing and sound-collecting chamber, and a middle, removable cartridge receiving housing, the cartridge being filled with small particles of exhaust gas purifying material.

Abstract: A catalytic converter for treating poisonous exhaust gases from an engine consisting essentially of highly purified copper. The catalytic converter is produced as an elongated, generally cylindrical body having a helically threaded outer surface and is mounted between a cylinder head and a manifold.

Abstract: An internal combustion engine exhaust manifold with cylindrical built-in catalyst container which comprises cylindrical inner and outer cylinders and annular lids fitting at opposite ends thereof and is filled with a catalyst suitable for cleaning the engine exhaust.An exhaust gas cleaning device using the exhaust manifold comprises an oxygen concentration sensor located in the exhaust gas flow and an electronic fuel injector for performing feedback control in accordance with a signal from the oxygen concentration sensor.

Abstract: A device for the after-burning of combustible components of engine exhaust gases, particularly for mounting on an engine block of an Otto engine, comprises a reactor housing which has an interior elongated reaction chamber. The reaction chamber is divided by a perforated bottom plate which extends across the reaction chamber and divides it into first and second chamber portions. An exhaust gas conduit is connected into the first chamber portion along with a secondary combustion air supply conduit, and the second chamber portion is connected to a treated gas discharge conduit for conducting away from the gases. The exhaust gas conduit is made very short and it has a flange thereon for mounting the device directly on the combustion engine block. The plate is perforated, and it includes one or more plate portions which permits the portions to be displaced relatively in order to accommodate any thermal expansion and contraction.

Abstract: A generally cylindrically shaped annular catalytic converter is provided within the manifold of an exhaust gas system with branch pipes extending from the manifold to introduce exhaust gases thereinto. Each of the branch pipes defines a flow direction extending tangentially of the catalytic converter with the central axis of each branch pipe being directed at an oblique angle relative to the central axis of the catalytic converter and spaced from each other axially relative to the converter central axis.

Abstract: An exhaust gas purification apparatus for a vehicle in which exhaust gases from an internal combustion engines are subject to a catalytic reaction in a reducing catalyst bed and an oxidizing catalyst bed to remove nitrogen oxides and combustible constituents in the engine exhaust gases. In the device, the reducing catalyst bed and oxidizing catalyst bed are disposed in series in the flowing direction of exhaust gases within a cylindrical casing mounted integrally to a joining portion of exhaust manifold, and secondary air supplying means is provided when the exhaust gas temperature at a point downstream of the catalyst beds is lower than a predetermined setting.

Abstract: Disclosed herein is an exhaust system for an internal combustion engine including a catalytic converter. A valve-controlled by-pass around the catalyst bed in the converter is provided such that the exhaust gas is only passed through the catalyst bed during engine warm-up. The valve is automatically controlled by engine temperature such that after the engine attains operating temperature the by-pass valve opens and the exhaust gas by-passes all catalyst.

Abstract: An exhaust gas cleaning device purifier for use in an internal combustion engine of a multicylinder type, comprising a housing to be disposed between exhaust ports of a cylinder head and an exhaust pipe in which housing a catalyst container is enclosed, the catalyst container consisting of two cylinders between which catalyst is filled, a control valve being provided on the catalyst container for passing a part of exhaust gas through the catalyst, thereby a part of the exhaust gas is passed or not through the catalyst in accordance with the conditions of the engine.

Abstract: A thermal reactor adapted to receive hot exhaust gases generated as the result of the combustion of a hydrocarbon fuel within an engine. The hot exhaust gas stream taken directly from the engine, is passed into a chamber where it reacts with air, preferably in the presence of a reaction promoting element. However, prior to the reaction stage, the hot gas is urged into a swirling motion and through a constricted passageway whereby to provide through a longer dwell period, better mixing, and avoid direct impingement of the gas against the catalyst bed surface when the latter is utilized.

Abstract: A manifold for an internal combustion engine to serve also as an exhaust gas depollution reactor. An ante-chamber into which the gas initially flows, can be made to operate as a post-combustion chamber by introduction of excess combustion air while the engine is operating under the usual richer fuel/air mixture on start-up. The catalytic reaction components are located in a downstream main chamber with which the ante-chamber shares a common partition wall for heat transfer purposes.