Abstract:
Partikelfilter zur Reinigung von Abgasen aus Brennkraftmaschinen, mit einem Filterkörper (4), der aus wenigstens einer spiralförmig um eine Längsachse (19) des Filterkörpers (4) gewickelten Filterbahn (18) besteht, die in radialer Richtung beabstandete Filterwände (21, 22, 24, 26) bildet, welche einen in Strömungsrichtung gesehen vor den Filterwänden (21, 22, 24, 26) liegenden ersten Filterraum (23) von einem hinter den Filterwänden (21, 22, 24, 26) liegenden zweiten Filterraum (27) trennen, wobei der erste Filterraum (23) zu einer einströmseitigen, ersten Stirnseite (12) des Filterkörpers (4) hin geöffnet und zu einer ausströmseitigen, zweiten Stirnseite (13) des Filterkörpers (4) hin geschlossen ist, dadurch gekennzeichnet, dass ein radialer Abstand (A) zwischen den radial begrenzenden Filterwänden (22, 24; 24, 26) eines der Filterräume (23, 27) im Bereich einer der Stirnseiten (12, 13) grösser ist als ein radialer Abstand (a) zwischen den radial begrenzenden Filterwänden (24, 26; 22, 24) des anderen Filterraums (27, 23).
Abstract:
Gegenstand der Erfindung ist eine Abgasnachbehandlungseinheit mit einer ersten Stirnfläche (4), einer zweiten Stirnfläche (5) und mit einer sich zwischen der ersten (4) und der zweiten Stirnfläche (5) erstreckenden für Abgas durchströmbaren Wabenstruktur (2) in einem Mantelrohr (3), wobei an die erste Stirnfläche (4) Anschlussmittel (7) zumindest nahezu dichtend angeschlossen sind, durch die das Abgas in einen Hinströmbereich (8) der Wabenstruktur (2) einströmen kann, wobei es nach Umlenkung hinter der zweiten Stirnfläche (5) durch einen Rückströmbereich (9) zurückströmen kann. Eine erfindungsgemäße Abgasnachbehandlungseinheit (1) ermöglicht in vorteilhafter Weise eine Abgasnachbehandlung auch bei nur wenig Einbauplatz. Besonders gut kann dadurch ein im Bereich eines Turboladers seitlich vorhandener Sackraum genutzt werden. Eine erfindungsgemäße Abgasnachbehandlungeinheit (1) ist preiswert herstellbar und zuverlässig unter thermischen Wechselbelastungen, so dass eine gute Dauerhaltbarkeit erreicht wird.
Abstract:
1. Abgasnachbehandlungssystem, insbesondere für einen Dieselmotor. 2.1. Es wird ein Abgasnachbehandlungssystem mit einem Abgaspartikelfilter (3), einem dem Abgaspartikelfilter nachgeschaltetem Stickoxid-Reduktionskatalysator (7, 8) und einer Reduktionsmittelzugabevorrichtung (17) vorgeschlagen. 2.2. Erfindungsgemäss ist das Abgaspartikelfilter (3) als ein poröser zylindrischer Filterkörper mit im wesentlichen radialer Abgaseinströmrichtung in den Filterkörper, einem Filterinnenbereich (26) für gefiltertes Abgas und axialer Abgasausströmrichtung aus dem Filterinnenbereich ausgebildet und über die Reduktionsmittelzugabevorrichtung (17) eine Zugabe von Reduktionsmittel in den Filterinnenbereich (26) vorgesehen. 2.3. Anwendung in Kraftfahrzeugen, insbesondere in Nutzfahrzeugen.
Abstract:
A silencer (143) is disclosed that reduces the acoustic energy of a fluid mixture (111) of a liquid coolant (109) and of exhaust gas (107) from an engine. The engine may be a marine engine. The silencer (143) according to this aspect includes a receiving chamber (171) that receives the fluid mixture (111) and exhaust gas (107), at least one lifting conduit (175); and a separation chamber (173). The lifting conduit (175) has a receiving portion (177) with a first opening (179) and an expelling portion (181) with a second opening (183). The receiving portion (177) is fluidly coupled with the receiving chamber (171) so that the fluid mixture (111) enters the first opening (179) from the receiving chamber (171) and is lifted through the lifting conduit (175) to the expelling portion (181). This lifting may be accomplished, at least in part, by dynamic effects. The separation chamber (173) is fluidly coupled with the second opening (183) of the lifting conduit (175), and has at least one interior surface (185). The expelling portion (181) of the lifting conduit (175) is disposed so that fluid mixture (111) expelled from the second opening (183) is directed toward the at least one interior surface (185) of the separation chamber (173). The at least one interior surface (185) may dynamically separate, for example by linear momentum effect or centrifugal effect, at least a portion of the exhaust gas (107) from the fluid mixture (111).
Abstract:
A honeycomb structural body, and a honeycomb filter and a converter system using the honeycomb structural body, the honeycomb structural body comprising a plurality of axially passing flow holes (3) formed with a plurality of partition walls (1, 2), wherein the plurality of partition walls (1, 2) are formed of a plurality of partition walls with different thicknesses, and the partition walls (2) thicker than the averaged thickness of the plurality of the partition walls with different thicknesses are disposed in a specified partial area of an entire area where the partitions are disposed at a rate higher in quantity than the rate in the other areas, the honeycomb filter and the converter system using the honeycomb structure comprising a sufficient mechanical strength against an external pressure while meeting the requirements in recent years such as an increase in warming−up characteristics in purification performance and a reduction in harmful substances discharged immediately after the start of an engine and also a large erosion and thermal shock resistances.
Abstract:
The invention provides apparatus for treating a gas stream, notably a silencer assembly for use to treat the exhaust gasses from an internal combustion engine, which apparatus comprises a plurality of compartments within which one or more treatments are to be performed on a gas stream passing through the compartment, and through which the gas stream is to flow sequentially, characterised in that: a) at least two of said compartments each comprises a tubular body member containing or carrying a treatment element which is restrained against axial movement relative to the body member; and b) the tubular body members of the adjacent compartments are provided with radially outwardly and/or inwardly extending terminal flanges, at least some of which flanges provide a shoulder against which the opposing terminal portion of the adjacent compartment bears so as to form an axially extending structure comprising at least two compartments in axial or coaxial relationship to one another; and c) one or more clamping members which extend axially over substantially the length of the said structure and act upon the axial structure to secure the two adjacent compartments together in gas-tight engagement by an axial clamping action.
Abstract:
A device for catalytic treatment of air or gases. The catalyst is carried on a shaped patterned band. The band is folded into a package (1), which, when received in a casing (2), forms two groups of parallel flow channels having a single connection (9, 10) for incoming and exiting flows at the sides of the package (1), and gas reversal chambers (4, 5) at the package ends. The gas reversal chambers may enclose heating or cooling devices. The exchange of heat between the incoming flow and the exiting flow provides excellent heat economy.
Abstract:
An exhaust gas treatment device (10) defines a flow path through a preliminary catalyst zone, a hydrocarbon trap (32) and a secondary catalyst zone in a single canister (12). The two catalyst zones are disposed in heat exchange relation to each other within a single crossflow carrier (18) to improve the performance of the hydrocarbon trap (32) and to accelerate the rise of the catalytic material in second catalyst zone to its light-off temperature to improve its performance in converting hydrocarbons desorbed from the trap. In a particular embodiment, a device (110) according to the present invention can be configured to treat two independent exhaust gas streams simultaneously.
Abstract:
The present invention relates to an exhaust gas cleaning device with a particle filter for carbon-containing exhaust gases, especially from internal combustion engines, which can be regenerated by the burning of separated carbon particles and has copper to reduce the burning reaction temperature. In order to make such an exhaust gas cleaning device more reliable and hence more environmentally friendly and power saving, according to the invention the particle filter (2) is a surface filter and consists of a compact one-piece porous material.
Abstract:
The invention concerns a system (20) used to reduce pollutant emissions in the form of hydrocarbons, carbon monoxides and nitric oxides from internal combustion engines, in particular from ships' engines or stationary engines. The catalyst housing (40) is covered by a gas-insulation hood (24) which is open upstream for the waste gas (18) to be decontaminated and is closed downstream. The gas-insulation hood (24) comprises a water cooler (28) which at least in some cases rests on the exterior thereof. The gas-insulation hood (24) preferably takes the form of a baffle silencer of known type of construction.