Abstract: A support for installations in the field of housing technology and industry includes first and second chords (12; 22) spaced from each other and formed of two elongate profiles (13; 23) extending parallel to each other and spaced by a distance (A) from each other, U-shaped connection profiles (14; 24) for connecting the elongate profiles (13; 23) of at least one of the first and second chords (12; 22) with legs (15; 25) of each U-shaped connection profile (14; 24) being secured to a respective elongate profiles (13; 23), and with a base (16; 26) of each U-shaped connection profile (14; 24) being spaced from the elongate profiles (13; 23); and with two longitudinally extending wave-shaped bars (31) for connecting the first and second chords (12; 22) and having turnover regions (32) connected with the elongate profiles (13; 23) of the first and second chords, respectively.

Abstract: A one-piece mounting bracket for securing a roof-top structure to the roof top of a building. In one embodiment, the one piece mounting bracket includes a first substantially L-shaped portion for engaging the roof top of a building, a second substantially L-shaped portion for engaging the roof top of a building, and a substantially flat base portion integrally connecting the first substantially L-shaped portion and the second substantially L-shaped portion such that the first substantially L-shaped portion and the second substantially L-shaped portion are aligned substantially in one direction.

Abstract: As installation clip for use in supporting a window, such as a mulled window, during installation in a building wall opening, and reinforcing the window after installation against the pressures of wind or the like. The installation clip is of unitary construction with a generally flat base portion, and a set of counterextending, raised tab portions projecting upwardly and outwardly from one side of the base portion. The height and width of the raised tab portions are selected to conform substantially to the dimensions of a recess in the bottom frame member of the window with which the clip is to be used. The installation clip is mounted to the sill structure of the building wall opening, with its tab portions facing into the center of the opening, and the window is inserted into the opening onto the mounted clip. The raised tab portions of the clip engage in the recess in the window bottom frame, and hold the window in place while it is permanently secured in the opening by conventional means.

Abstract: A motor vehicle has a body shell section, an interior trim part covering the body shell section and an attachment device for a separating or retaining element in particular a luggage grille. The attachment device has a mounting part secured to the body shell section with an attachment section and a holding device. The interior trim part has a hole, into which a cover is inserted, through which the holding section passes. In order to be able to reduce rattling noises, the cover is attached exclusively to the interior trim part and lies at a distance from the body shell section. An extension section is additionally provided between the holding section realized as a hook and the attachment section, in conjunction with which the hook is provided with a covering made of plastic executed as a push-on part, which together with the cover conceals the attachment device.

Abstract: The invention provides a method and an assembly jig for fixing a pipe structure unit manufactured by assembling tenons and mortises formed on end portions of pipes to a building structure. The pipe structure unit 10 comprises large-diameter pipes 20, 30, 40 and 50 and small-diameter pipes 60, 70 and 80 which are assembled on an assembly jig 100 by assembling tenons and mortises formed in advance on the ends of the pipes via laser machining. The pipes are provided with mounting portions disposed on the other ends thereof, which are used to temporarily tighten the pipes to flanges of pillars 200 and 210. A jack 130 of the assembly jig 100 is lifted to compress the gaps formed at the tenons and temporarily tightened portions, and the pipes are fully tightened in this state. If necessary, the joint portions of the pipes are welded via spot welding and the like to complete the building structure.

Abstract: A method of camouflaging a structure against a background having a generally uniform composition of hue, saturation and brightness. In one embodiment, spaced regions on the exterior of a structure are colored with differing colors and regions between the spaced regions are colored with a gradient of the differing colors so as to create a gradual color transition between the spaced regions. In another embodiment, at least one reflector and, optionally at least one color filter, are located on a structure to reflect light in the foreground to a vantage point, and optionally filter such light, so as to effect a blending of at least a portion of the structure into the background when viewed from the vantage point.

Abstract: The present invention provides a water management building wrap that may be useable between a frame structure of a building and an exterior building covering. In at least one embodiment, the building wrap comprises a permeable membrane and an extruded polymeric drainage structure secured to the second side of the membrane. In at least one embodiment, the drainage structure includes a plurality of generally vertical members having a first thickness and forming boundaries for generally vertical water drainage channels, and a plurality of generally horizontal members attached to the generally vertical members and having a second thickness less than the first thickness and forming integral joints at intersections of the generally vertical members and the generally horizontal members that provide dimensional stability to maintain the orientation of the generally vertical members and form stable vertical water drainage channels.

Abstract: A structural sandwich plate member is provided with at least one interlayer to improve ballistics and/or blast resistance. The interlayer may be a solid or perforated metal plate, a metal mesh, hard ceramic or high tensile strength fabric. The interlayer may be corrugated.

Abstract: A fire-resistant road-system apparatus includes at least one cover can be arranged detachably in a frame that is intended to be fixed to the ground, to close a gallery or an underground technical room to protect it from fires. A casing filled with a heat-insulating refractory material is fixed detachably under the cover. The invention is applied in road-system or railroad tunnels.

Abstract: A flexible pouch for packaging a product includes a front panel and a back panel, each having an upper edge, a lower edge opposite the upper edge, and side edges extending therebetween the upper and lower edges, that are joined together at the side edges and the lower edges to contain the product. The front and back panels include an outwardly projecting crease that forms a guide pocket for separating the panels, prior to filling the pouch with the product, and the crease is straightened out when the upper edges of the front panel and back panel are sealed together. A method of forming and filling the flexible pouch includes the steps of forming the panel, and forming a crease in each of the panels that projects outwardly and extends longitudinally along each of the panels.

Abstract: The invention relates to a saddle pad that exhibits pockets (16) on its top side facing toward a saddle to be laid on, arranged along and to the left and right of a line of symmetry (A) of the saddle pad. The pockets (16) extend over the entire length of the saddle pad (10). Inserted into the pockets (16) is a plate-shaped spring device (20), by which optimal stabilization and pressure distribution are achieved, even when treeless saddles are provided for the riding of a riding animal.

Abstract: It is provided in the present invention with a pervasive dedusting device for a vacuum cleaner, which includes a tank with a wind inlet and a wind outlet. A filter barrel is mounted inside the tank while a cyclone barrel is mounted inside the filter barrel. The cyclone barrel is configured to be a conical barrel with a smaller upper end and a larger lower end and a cyclone wind inlet is disposed on it. The wind inlet on the tank and the cyclone wind inlet on the cyclone barrel are separated by the filter barrel and located in two chambers respectively. A wind outlet tube is located in the upper end of the cyclone barrel and communicates with the wind outlet. The pervasive dedusting device has low air flow pressure loss, improved dust suction effect, fine dust filtering function, decreased operation noise, and it can effectively prevents secondary pollution and filter out fine dust completely.

Abstract: A cyclonic cleaner which includes a cyclone unit enabling a reduction of noise generated from the cyclone unit, and reduction in pressure loss by forming a smooth air flow. The cyclone unit includes a body having an air inlet and an air outlet, a primary cyclone to primarily separate foreign matter from air drawn through the air inlet, a plurality of secondary cyclones to secondarily separate foreign matter from air discharged from the primary cyclone and to discharge the air having the foreign matter removed therefrom through discharge holes of the secondary cyclones, and a noise reduction member positioned in the discharge hole of each secondary cyclone to reduce noise. The cyclone unit also includes a guide plate to allow the air discharged through the discharge holes of the secondary cyclones to be smoothly discharged through the air outlet.

Abstract: A cyclone air purifier reduces pressure loss and noise generated from second cyclones and has an improved dust collecting efficiency. The cyclone air purifier includes a cylindrical main body, at least one first cyclone having at least one inlet formed through a side surface the main body to receive air therethrough and to perform a first dust separation operation on the air introduced therein having a first outlet pipe to discharge a first part of the air, and at least one second cyclone to receive a second part of the air from the first cyclone and to perform a second dust separation operation on the second part of the received air. An ionizer is installed in the first cyclone to ionize the dust in the air, and an inductor is installed in a guide duct, which connects the first and the second cyclones, to induce small particles of the ionized dust in the first cyclone into the second cyclone using an electrically attractive force.

Abstract: Embodiments of the invention are directed to methods and systems of purging of transfer containers, such as standardized mechanical interface (SMIF) pods. In particular, purified purge gases can purify front operated unified pods (FOUPs) and other non hermetically sealed transfer containers, such that the containers can be interfaced with a sealed chamber (e.g., a semiconductor processing tool) without detrimentally contaminating the environment of the sealed chamber with organics and other harmful contaminants. The methods and systems may be used to transfer objects, such as wafers, semiconductor components, and other materials requiring exposure to extremely clean environments, during electronic materials manufacturing and processing. Transfer containers specifically configured to promote purging of the container's enclosure are also described.

Abstract: A filter-fan unit has a housing, at least one fan arranged in the housing, and at least one filter connected to the housing. The housing is transferable from a transport/storage position into a position of use, wherein the transport/storage position is significantly smaller than the position of use. The housing is foldable from the transport/storage position into the position of use. The housing has a housing frame and one or more sidewalls connected with one side to the housing frame.

Abstract: An air-conditioning system for a vehicle includes a clogging detection device for detecting clogging of a filter. The clogging detection device detects clogging of the filter only when a face damper for opening and closing a face air duct provided with movable louvers is in the closed position.

Abstract: A mist elimination device in the form of a hood for the removal of moisture from a gas stream treated by a WESP includes a series of gutters on the outer surface of the hood to trap liquid droplets and direct the moisture to channels the drain to the lower region of a housing. Gutters are also provided on the interior surface of the hood to catch liquid droplets carried by the gas stream into the interior of the hood.

Abstract: An air cleaner includes a housing having an air inlet and an air outlet, a casing mounted inside the housing and holding a first filter element with wire gauzes and a second filter element with active carbons at different elevations for removing solid matters and germs from currents of air passing from the air inlet toward the air outlet, two electric fans mounted on two ends of the casing for drawing currents of air into the inside of the housing through the air inlet toward the air outlet, a negative ion generator and an ultraviolet lamp mounted inside the housing for sterilizing currents of air passing through the housing.

Abstract: A filter element 12 that includes a fluid inlet 16, a fluid outlet 17 that is in fluid communication with the inlet 16, a filter media 40, 42 through which the fluid passes when moving from the inlet 16 to the outlet 17, and a plenum 38 that comprises continuous filaments 66 that are bonded to each other at points of filament intersection 68. The plenum is easy to manufacture, is resistant to compaction when contorted, and exhibits a low pressure drop as air is distributed across the filter media.

Abstract: The present disclosure relates to compounds from which nanofibers can be produced, the resulting nanofibers produced from the compounds, and nanofiber reinforced polymers prepared using the nanofibers and a polymer. The compounds used in forming the nanofibers include chemical linkage moieties that are capable of forming non-covalent bonds with portions of the polymer so as to form the nanofiber reinforced polymers. The nanofiber reinforced polymers are useful as biomaterials in medical devices.

Abstract: The invention relates to channel frame members having retaining fins projecting from inside walls of the channel frame and framed filters wherein a peripheral edge of a filter medium is inserted into such a channel frame member.

Abstract: While easiness in insertion of a filter cartridge into an inner shell is improved, reliably prevented is exhaust gas from bypassing a particulate filter and a filter cartridge from backlashing. Disclosed is an exhaust emission control device with a filter cartridge 11 fitted through insertion into an inner shell 8 of a muffler. The inner shell 8 is formed to have an inner diameter greater than an outer diameter of a cartridge shell 10 to provide an insertion clearance C. The inner shell 8 is formed with an inward, tapered portion 8b gradually reduced in diameter toward a direction of insertion of the filter cartridge 11, so that a portion of the inner shell inward of the tapered portion is formed as a small-diameter portion 8c with the reduced insertion clearance C.

Abstract: A filter block, particularly for filtering particulates present in the exhaust gases of an internal combustion engine, including peripheral inlet (50,14p2) and outlet (52,14p1) channels arranged alternately at the periphery of the block and each including an external wall (44;54 ;401,402;403) exposed to the exterior of the block and an internal wall (46 ;56 ;404,405 ;406,407,408) arranged inside the block. The block according to the invention is remarkable in that it includes at least one group (G) of two adjacent peripheral channels (50,52) such that, in a transverse plane of section (P), the ratio R of the average thickness “E” of all the external walls (44,54) of the group (G) to the average thickness “e” of all the internal walls (46,56) of the (G) is greater than 1.2.

Abstract: A filter for absorbing odoriferous matter from ambient air has a single body with a line of weakness that extends across at least a portion of the body and divides the filter element into at least two separately usable sub-filters. The line of weakness permits the separation of the single filter element into the sub-filters without the use of a tool. The filter element can be used in combination with varying size air purification units. The filter element can be placed in the filter housing of a large air purifier or after separation the sub-filters can be used in multiple correspondingly sized smaller air purifiers.

Abstract: A motor coupling assembly for a mower cutting unit includes a coupling ring connected to the mower cutting unit. The coupling ring includes a coupling face having female ramp elements created in the coupling face. Magnets are positioned about the coupling face each including a face positioned substantially coplanar with the coupling face. A ring member connected to a motor includes a ring face having male ramp elements equal in quantity to the female ramp elements. The male ramp elements extend outwardly from the ring face and engage within the female ramp elements. The ring face is retained in contact with the coupling face by only a magnetic force of the magnets. The ring member is rotationally locked with respect to the coupling ring by complete engagement of the male ramp elements within the female ramp elements.

Abstract: The inventive hay-harvest machine comprises a frame consisting of a longitudinal beam (2), a coupling device (3) which hinges on said beam (2) and by a cross member (4) which is fixed to the beam and provided with supporting wheels (7, 8). Said frame (1) comprises at least one working member for displacing products lied on the ground. Said invention is characterised in that the beam (2) of the frame (1) consists of at least two parts (21, 22) one of which carries the coupling device (3) and the other carries the cross member (4) provided with the wheels (7, 8) or with working members (13) and said parts (21, 22) are pivotable with respect to each other by means of at least one substantially vertical axis (23) in such a way that they swing with respect to each other, thereby making it possible to obtain different operating positions.

Abstract: A lawn mowing device that is adapted to be attached to the back of a tractor. The device includes a boom that extends a mowing deck to the side of the tractor so a surface can be mowed without the tractor having to actually drive on top of the surface. The mowing deck can also be angled up or down so that sloping surfaces can be uniformly cut. The present side mower allows for easy mowing of river and pond banks, which are often soggy and hard to traverse with a vehicle or traditional lawnmower. The side mower is attached to the back of a tractor via a standard three-point hitch. A counterweight is provided in the back of the side mower to offset the weight of the extended mowing deck and prevent the tractor from tipping over. The mowing deck preferably includes it's own 5-hp motor that provides power to the blades that are housed under of the mowing deck.

Abstract: A transport system for a crop header includes a first and a second wheel arrangement on the header frame adjacent a respective ends for acting as a stabilizer when the header is in the operating position and movable to a transport position for transporting the header when removed from the vehicle in a transport direction generally longitudinal of the header frame and at a right angle to the working direction with each being mounted on the header frame for rotation of a rolling direction of the first wheel arrangement between the working position and the transport position, in which the rolling direction is along the transport direction. Each of the wheel arrangements includes two parallel wheels coupled together.

Abstract: A riding mower has a frame supported by a plurality of wheels including a pair of front drive wheels covered by front fenders. A plurality of cutting units are arranged in advance of the frame. The operator sits on a seat atop the frame at the front of the frame. The operator mounts and dismounts the seat from behind the front fenders and the front wheel and not from the front, access to the seat from the front being prevented by the placement of the cutting units. A pivotal armrest along one side of the seat normally blocks access to the seat from that side. However, the armrest can be pivoted to a raised position in which it clears the seat to allow the operator to reach the seat from that side of the seat.

Abstract: A reinforcing cord for rubber reinforcement of the present invention includes reinforcing fibers. The reinforcing fibers include polyarylate fibers 11 and a plurality of outer strands 12 that are arranged around the polyarylate fibers 11. The plurality of outer strands 12 include fibers other than polyarylate fibers. The use of this reinforcing cord for rubber reinforcement makes it possible to obtain a reinforcing cord for rubber reinforcement having high strength, elasticity, and bending fatigue resistance, and a rubber product including the same.

Abstract: A method for coating one or more yarn components, either individually or in an assembled configuration, with a (co)polymer coating is provided involving (i) immersing the one or more yarn components, either individually or as an assembled unit of two or more of said yarn components, in a treatment bath containing a carrier medium and a (co)polymer that can be dissolved or dispersed in the carrier medium; (ii) removing the one or more yarn components from the treatment bath; and (iii) evaporating excess carrier medium from the one or more yarn components to thereby form a coating of the (co)polymer on a surface of the one or more yarn components; and the coated yarn products formed thereby.

Abstract: The invention relates to a Drawing-Frame-slubbing machine combination (35), with which, in the same machine, several fibre assemblies (38) are first doubled and stretched and a roving yarn (9) is then manufactured from this. The manufacture of the roving yarn (9) takes place in that a twist (rotation) is applied to the drafter sliver (3), whereby the twist application is effected by means of one or more air flows. To achieve this, the device (35) according to the invention exhibits a drawing frame (36) and one or more twist application means (4) arranged downstream of this.

Abstract: Larger pre-tension is applied to each link such that residual compressive stress is larger at the portion of the link facing the inside of a chain than the outside. Assuming that for each of the links in a state that pre-tension is not applied, a predetermined pitch is P, a first inclination angle of a fixing portion of the front inserting portion with respect to a chain proceeding direction is ?, and a second inclination angle of a fixing portion of the rear inserting portion with respect to a chain proceeding direction is ?, when the pre-tension is applied to each of the links, the pitch changes into P+?P, the first inclination angle changes into ???? and the second inclination angle changes into ?+?? where ?P>0, ??>0, and ??>0.

Abstract: The pump system extracts motive power from oil in the pressurized oil circuit to power a scavenge pump mounted on a scavenge oil circuit.

Abstract: [Object] To provide a gas turbine engine which is simple in structure but can effectively remove foreign matters from the combustion air. [Means] The intake passage 21 includes an inlet portion 29, a curved portion 30 and a reduced diameter portion 31. The bypass duct 24 is curved away from the central axial line CL in a region corresponding to the curved portion 30 and reduced diameter portion 31 of the intake passage 29. Between the intake passage 29 and bypass duct 24 is defined an annular space 32. In the reduced diameter portion 31, the outer liner 20 is formed with a large number of foreign matter introduction openings 33 in a circumferential arrangement for communication between the intake passage 21 and annular space 32. The inner casing 4 is formed with a plurality of foreign matter ejection holes 34 in a circumferential arrangement in a part thereof that curves outward for communication between the annular space 32 and bypass duct 24.

Abstract: A chemical hybrid propulsion motor can be comparable in performance to a solid motor or liquid fueled engine if it uses cryogenic nitrous oxide as its oxidizer and a pump such as a turbopump to transfer the oxidizer into the motor case. Cryogenic nitrous oxide (at about ?100° F.) has high density which will reduce oxidizer tank volume and weight and this oxidizer combusts at a high oxidizer to fuel (O/F) ratio which minimizes motor case size and weight. The high O/F would also reduce unburnt fuel sliver and hence residual propellant weight. The pump not only transfers the oxidizer into the motor at increased chamber pressure that in turn increases specific impulse, but it also significantly reduces oxidizer tank pressure and weight as compared to a pressure fed motor.

Abstract: A propulsion system for producing thrust includes a turbine engine. The engine has a compressor, a combustor downstream of the compressor along a flow path, and a turbine downstream of the combustor along the flow path. A plurality of combustion conduits have outlets positioned to discharge combustion gas to form a fluidic nozzle throat.

Abstract: Method and arrangement for providing an outlet nozzle (10) for use in a liquid fuel rocket engine. The nozzle forms a body of revolution having an axis (11) of revolution and a cross section that varies in diameter along said axis. The nozzle has a wall structure having a plurality of mutually adjacent cooling channels, helically extending substantially in parallel from the inlet end (13) of the nozzle to its outlet end (14). The nozzle includes at least two longitudinally arranged sections (10a, 10b, 10c). A shift between a positive and a negative channel angle in the transition from one section to an adjacent section balances any roll momentum generated by friction of rocket exhausts against the nozzle wall.

Abstract: An object of the present invention is to provide a new exhaust gas purification apparatus for an internal combustion engine operated under a condition of an air fuel ratio leaner than a theoretical air fuel ratio, a method for purification of exhaust gas and an exhaust gas purification catalyst, which is suitable for suppressing degradation of the NOx purification catalyst by sulfur components.

Abstract: An ECU controls a rich purge in the internal combustion engine by temporarily changing an air/fuel ratio of the exhaust gas into a rich range to deoxidize and remove absorbed NOx, which is absorbed by an NOx storage and reduction catalyst of an NOx catalytic converter. The ECU changes a degree of richness of the air/fuel ratio at a time of performing the rich purge based on a state of the NOx catalytic converter.

Abstract: A diagnostic apparatus for an internal combustion engine is disclosed herein. In one embodiment, the diagnostic apparatus comprises a catalytic converter and a controller. The catalytic converter is disposed in an exhaust passage of an engine and treats an exhaust gas component in the exhaust gas. The controller is adapted to perform a number of functions. More specifically, the controller is adapted to operate the engine with an engine control parameter to increase catalyst temperature of the catalytic converter during a cold engine condition. The controller is further adapted to calculate a temperature factor indicative to temperature increase of the catalyst based on the engine control parameter. The controller is further adapted to estimate the amount of the exhaust gas component flowing out of the catalytic converter based on the temperature factor.

Abstract: An ECU performs exhaust temperature control based on output values of multiple exhaust temperature sensors provided upstream and downstream of a particulate filter provided in an exhaust passage of an engine. The ECU calculates a change speed deviation value by subtracting change speed of outlet side exhaust temperature, which is sensed by one of the exhaust temperature sensors, from change speed of inlet side exhaust temperature, which is sensed by the other one of the exhaust temperature sensors, in an operation state in which temperature of exhaust gas flowing through the particulate filter changes rapidly. The ECU determines that the exhaust temperature sensors are mounted erroneously if the change speed deviation value deviates from a predetermined normal range.

Abstract: The present invention relates to new crystalline, essentially all silicon oxide molecular sieve SSZ-73 prepared using a 3-ethyl-1,3,8,8-tetramethyl-3-azoniabicyclo[3.2.1]octane cation as a structure-directing agent, and its use in treating engine exhaust.

Abstract: This system for assisting the regeneration of depollution means associated with oxidation catalyst-forming means implementing an OSC function, constituting a supply of oxygen and integrated in an exhaust line of a motor vehicle diesel engine, in which the engine is associated with common rail means for feeding its cylinders with fuel, comprises means for analyzing the running conditions of the vehicle and for comparing them with predetermined threshold values, to control the engine in a first regeneration mode of operation with a lean mixture when running conditions are above the threshold values, or in a second regeneration operating mode implementing sequences in which engine operation alternates between stages of rich mixture operation and of lean mixture operation when conditions are below the threshold values.

Abstract: A system for controlled regeneration of a lean NOx trap for an internal combustion engine. The system may include regenerating one trap or a portion of a lean NOx trap while using another trap or portion of the lean NOx trap for an exhaust, and then interchanging operations. The portions may be individual structures or of one structure. The trap may be a rotating element that is regenerated in part at a time. There may be valves that direct the exhaust gas through one trap and regeneration gas through another trap and vice versa. Also, an exhaust system with regeneration may include temperature, pressure, NOx and differential pressure sensors. A processor may be connected to the sensors. There may be emission sampling lines connected to different parts of the system and to a collector to take, store, detect and analyze samples. A processor may be connected to the collector.

Abstract: The invention relates to a procedure for controlling the reducing agent in an exhaust gas post-processing system of a combustion machine with an exhaust gas duct, in which an SCR catalytic converter is provided in the direction of flow of the exhaust, wherein a reducing agent generation system has an NOx and CO/H2 generation unit,, an oxidation catalytic converter and a combined NOx storage / ammonia generation unit in the standard gas route of the reducing agent generation system, and, in order to reduce nitrogen oxide, ammonia is added as a reducing agent in front of the SCR catalytic converter by the reducing agent generation system, wherein source materials for the generation of ammonia are at least intermittently added to the NOx and CO/H2 generation unit via a fuel supply line and via an air supply line, wherein during the fat phase the air/fuel composition is changed in front of the oxidation catalytic converter in the form of a lambda modulation for a lambda value.

Abstract: The invention concerns a procedure to monitor an exhaust gas after-treatment system of an internal combustion engine with a motor block and an exhaust gas duct, which has at least one catalytic converter, upstream from which a reagent substance necessary for the NOx reduction in the catalytic converter is introduced by means of an introduction device, whereby the reduction agent rate is increased to such an extent at defined reference operating points until an ammonia breach is detected in direction of flow behind the catalytic converter by means of an ammonia sensitive sensor in the exhaust gas duct.

Abstract: A procedure is introduced to operate a particle filter, which is disposed in the exhaust gas stream of an internal combustion engine and which collects particles from the exhaust gas and possesses the capability for selective catalytic reduction of nitrogen oxides, whereby the selective catalytic reduction is set off by the supply of a reducing agent. The procedure characterizes itself in such a manner, that the supply of the reducing agent is temporarily decreased during a thermal regeneration of the particle filter. Moreover a control unit is introduced, which controls the operation of the procedure.

Abstract: This catalyst system simultaneously removes ammonia and enhances net NO, conversion by placing an NH3-SCR catalyst formulation downstream of a lean NOx trap. By doing so, the NH3-SCR catalyst adsorbs the ammonia from the upstream lean NOx trap generated during the rich pulses. The stored ammonia then reacts with the NOx emitted from the upstream lean NOx trap-enhancing the net NOx conversion rate significantly, while depleting the stored ammonia. By combining the lean NOx trap with the NH3-SCR catalyst, the system allows for the reduction or elimination of NH3 and NOx slip, reduction in NOx spikes and thus an improved net NOx conversion during lean and rich operation.