Abstract: An apparatus for separating a liquid from a mixed gas stream can include a wall, a mixed gas stream passageway, and a liquid collection assembly. The wall can include a first surface, a second surface, and a plurality of capillary condensation pores. The capillary condensation pores extend through the wall, and have a first opening on the first surface of the wall, and a second opening on the second surface of the wall. The pore size of the pores can be between about 2 nm to about 100 nm. The mixed gas stream passageway can be in fluid communication with the first opening. The liquid collection assembly can collect liquid from the plurality of pores.

Abstract: The present invention provides an exhaust cooler mounted to a tailpipe for receiving exhaust gas. The exhaust cooler includes a jet pump connectable to the tailpipe and a nozzle connectable to the tailpipe. The nozzle defines a nozzle opening between the tailpipe and the jet pump for communicating the exhaust gas from the tailpipe to the jet pump. A first throttle member is included that is moveable between a closed position and an open position, the open position defining a first opening between the tailpipe and the jet pump for communicating the exhaust gas from the tailpipe to the jet pump.

Abstract: According to one representative embodiment, an aspirator for cooling exhaust gas from an internal combustion engine includes a nozzle section, an expansion section, and an air entrainment section. The nozzle section is communicable in exhaust receiving communication with the internal combustion engine. The nozzle section includes a plurality of nozzles through which an exhaust gas stream is flowable. The expansion section is communicable in exhaust receiving communication with the plurality of nozzles. The air entrainment section is communicable in air supplying communication with the expansion section. The air is mixable with the exhaust gas within the expansion section.

Abstract: An exhaust purification system of an internal combustion engine is provided with an exhaust treatment device which purifies exhaust, a fuel feed device which is arranged at an upstream side from the exhaust treatment device and which feeds fuel to the engine exhaust passage, an ignition device which causes fuel which is fed from the fuel feed device to ignite, and a flow regulating device which regulates the flow rate of exhaust gas which flows toward the ignition device. The fuel feed device is formed so as to feed liquid fuel. The system has an operating region in which due to the fuel which is fed to the engine exhaust passage burning, backflow of the exhaust gas occurs. Fuel is made to burn in the operating region. Further control is performed to make the flow rate of the exhaust gas increase during the period from when combustion of fuel should be started to when combustion of the fuel ends.

Abstract: A mixing and/or evaporating device (7) is provided through which exhaust gas can flow axially. The mixing and/or evaporating device (7) is arranged in an exhaust gas-carrying line of an exhaust system of an internal combustion engine, especially of a motor vehicle, with a plurality of blades (8), which are arranged distributed in the circumferential direction and which project inwardly from an outer wall (9). Each blade (8) has a profile (10) at least in an area adjoining the outer wall (9) in the axial direction (14), in which profile a discharge edge (12) has an offset (16) in the circumferential direction (15) in relation to the leading edge (11). A reduction of the flow resistance of the device (7) can be achieved if the profile (10) has an angle of incidence (17) each in relation to the axial direction (14) at the leading edge (11) and at the discharge edge (12), which angle is in a range of ?10°, inclusive to +10°, inclusive.

Abstract: An apparatus for separating a liquid from a mixed gas stream can include a wall, a mixed gas stream passageway, and a liquid collection assembly. The wall can include a first surface, a second surface, and a plurality of capillary condensation pores. The capillary condensation pores extend through the wall, and have a first opening on the first surface of the wall, and a second opening on the second surface of the wall. The pore size of the pores can be between about 2 nm to about 100 nm. The mixed gas stream passageway can be in fluid communication with the first opening. The liquid collection assembly can collect liquid from the plurality of pores.

Abstract: A mixing device includes: a cylindrical portion having a blade provided inside thereof for mixing exhaust gas that flows inside of an exhaust pipe of an internal combustion engine, with an additive sprayed into the exhaust pipe by an adding valve; a flange having an insertion hole, into which the cylindrical portion is inserted, and extending outward in a radial direction of the cylindrical portion from an outer peripheral surface of the cylindrical portion; and a plurality of supporting portions that are provided on the flange and that support the cylindrical portion, wherein each of the supporting portions includes an extending piece that extends in a circumferential direction of the cylindrical portion from a base end portion connected to the flange.

Abstract: An exhaust aftertreatment system having a NOX absorber-catalyst and an ammonia-SCR reactor. During regenerations, the NOX absorber-catalyst generates ammonia. The ammonia-SCR reactor captures this ammonia and later uses it to reduce NOX. A Venturi is provided in an exhaust conduit connecting the NOX absorber-catalyst to the ammonia-SCR reactor. The Venturi draws sufficient air to keep the ammonia-SCR reactor under lean conditions throughout the NOX absorber-catalyst regenerations. Maintaining lean conditions for the ammonia-SCR reactor in this manner mitigates poisoning of the ammonia-SCR reactor by hydrocarbons slipping from the NOX absorber-catalyst during the regenerations. Mitigating this poisoning improves the performance of the exhaust aftertreatment system and reduce the loss of useful ammonia to oxidation.

Abstract: A machine includes an internal combustion engine disposed within an engine compartment and supported on a machine frame. An exhaust stack has an inlet fluidly connected to an exhaust manifold of the internal combustion engine and an outlet in fluid communication with ambient air. A diesel particulate filter is disposed along the exhaust stack, and the machine includes an active regeneration system for regenerating the diesel particulate filter. A cooling package including at least one heat exchanger and a blower fan. The blower fan is configured to blow cooling air from the engine compartment sequentially through the at least one heat exchanger and an outlet of the cooling package. Exhaust gas exiting the exhaust stack outlet is mixed with the cooling air exiting the cooling package outlet in a high temperature zone surrounding the exhaust stack outlet to form a fluid mixture.

Abstract: A modular exhaust carrier for an engine is provided. The modular exhaust carrier includes a first concave shell member and a second concave shell member. The first concave shell member is configured to define one half of an exhaust air passage. Moreover, the first concave shell member either includes a solid wall configuration or a dust ejector opening configuration. The second concave shell member is configured to define a second half of an exhaust air passage. The second concave shell member includes a solid wall configuration or a sensor housing configuration.

Abstract: In a land vehicle of the type having an engine and an exhaust system including an exhaust pipe, a flow diffuser for the exhaust pipe generally includes a substantially tubular body having an outer wall, an interior, and first and second ends, the first end being an exhaust inlet configured to be attachable to an exhaust pipe, the second end being an exhaust discharge portion having an exit plane, a plurality of radial struts extending inwardly from the inner surface of the outer wall to the center of the exit plane for dividing the exhaust discharge portion divided into a plurality of exit channels, and a plurality of air channels extending from the outer wall to the interior of the tubular body configured for delivering air to the interior of the tubular body.

Abstract: Arrangement for introducing a liquid medium into exhaust gases from a combustion engine: an injector for injecting the liquid medium into an injection chamber (3), a casing (8) which surrounds the injection chamber, a mixing duct (6), a gathering chamber (10) which surrounds the casing and is connected to the injection chamber via throughflow apertures of the casing, and a bypass duct (12) for leading exhaust gases into the mixing duct without passing through the gathering chamber and the injection chamber. The inlet (11) of the gathering chamber diverts a portion of the exhaust gases to flow into the gathering chamber, and then into the injection chamber via the throughflow apertures, and thereafter into the mixing duct, while the bypass duct leads another portion of the exhaust gases into the mixing duct in order to be mixed there with the diverted exhaust gases.

Abstract: An arrangement is provided for feeding a liquid additive from a receptacle into a fuel line or into an exhaust line of an internal-combustion engine of a motor vehicle by way of a blockable feed line leading into at least one of the above-mentioned line and by way of a pump which at least temporarily generates a feed pressure in the feed line. The receptacle can be filled with additive from a larger storage tank also accommodated in the motor vehicle by way of a connection line that can be blocked. The feed line branches off the connection line between the receptacle and the storage tank. The pump is installed in the receptacle or between the receptacle and the branching-off of the feed line into the connection line. The connection line can be shut-off in the storage tank or between the storage tank and the branching-off of the feed line.

Abstract: A secondary air supply device for an internal combustion engine includes: an electric air pump that supplies secondary air into an exhaust pipe of the internal combustion engine; a controller that controls actuation of the electric air pump according to an operating state of the internal combustion engine; and an air flow mechanism that rotates the electric air pump by causing air in the electric air pump to flow. The controller uses the air flow mechanism to rotate the electric air pump before energizing the electric air pump.

Abstract: In a structure of an additive-agent diffusion plate in an exhaust passage, the exhaust passage is an exhaust passage for an engine. The additive-agent diffusion plate includes a plurality of collision portions; and a plurality of communication portions that allow exhaust gas flowing in the exhaust passage to flow from an area upstream of the additive-agent diffusion plate to an area downstream of the additive-agent diffusion plate in an exhaust-gas flow direction. The additive-agent diffusion plate diffuses an additive agent injected into the exhaust passage, at a position upstream of an exhaust gas purification device, which is disposed in the exhaust passage, in the exhaust-gas flow direction. Each of the collision portions protrudes toward an upstream side in the exhaust-gas flow direction, and a cross section of each of the collision portions increases from the upstream side toward a downstream side of the exhaust-gas flow direction.

Abstract: An exhaust pipe injection control device for controlling an appropriate fuel injection amount regardless of engine rotation speed. The exhaust pipe injection control device includes: a target injection amount setting unit which sets, according to an engine rotation speed and an exhaust gas flow rate, a target injection amount that is injected in a single injection from an exhaust pipe injector; a base pulse width (“BPW”) map in which a fuel injection time of the exhaust pipe injector is set so that, with respect to the target injection amount and an exhaust pipe injection fuel pressure, fuel in the target injection amount is injected; and an exhaust pipe injection executing unit which performs injection from the exhaust pipe injector by referring to the BPW map based on the target injection amount and the exhaust pipe injection fuel pressure.

Abstract: In a system for injecting fuel into an exhaust pipe, an exhaust pipe is connected to an engine via an exhaust adaptor and the fuel is injected directly into the exhaust pipe through a fuel injection valve provided in the exhaust adaptor. A front end of the fuel injection valve is provided in an inner wall of an exhaust path located inside the exhaust adaptor. The inner wall provided with the front end of the fuel injection valve protrudes from the exhaust path of the exhaust adaptor in a direction in which the diameter of the inner wall expands. A coolant passage for cooling the periphery of the front end of the fuel injection valve is provided within the exhaust adaptor.

Abstract: A mixing and/or evaporating device (12) for an exhaust system (5) of a combustion engine (1), in particular of a motor vehicle, includes a support body which encloses a cross section of the device (12) through which a flow can flow and which runs transversely to the axial direction (20) of the device (12) in the circumferential direction. The support body (19) has at least one guide blade (25, 28) which extends away transversely to the axial direction (20). An improved efficiency is obtained with the guide blade (25) having a roof-shaped profile (29), including two guide surfaces (30, 31) that are interconnected via a ridge (32) or apex.

Abstract: A method to extract hot exhaust gas from the exhaust flue and use its heat energy to vaporize aqueous reactive reagents such as aqueous ammonia or to provide a heated air process gas mixture. Compressed air provides motive force to induce a vacuum in an ejector venturi device which draws hot exhaust gas (“hot gas”) from the exhaust flue. In one embodiment the hot gas is drawn into a vaporizer unit. The heat energy in the hot gas vaporizes the injected aqueous reagent. The vaporized mixture is drawn into the ejector and is entrained in the motive air. The diluted reagent vapor mixture is injected back into the exhaust flue to support the selective catalytic reduction (SCR) process and reduce nitrogen oxide (NOx).

Abstract: The present invention has its object to suppress heat transfer from an adapter 19 to an injector 11 so as to ensure a high level of reliability of the injector 11 over a long time. In a mounting structure for an injector 11 fitted at a mixing pipe 9B (exhaust passage) via an adapter 19 for addition of urea water into exhaust gas 3, an inner surface of the adapter 19 to be exposed to the flow of the exhaust gas 3 is shielded by a heat-resisting plate 22 to interpose a heat insulating layer 23 between the plate 22 and the inner surface.

Abstract: A flow diffuser for vehicles of the type having an engine and an exhaust pipe generally includes a body including a plurality of inner diffusion ports extending through the body, wherein the body may be attached to an exhaust pipe at or near the exit plane of the exhaust pipe, wherein the body is sized to have a cross-sectional area that is smaller than the cross-sectional area of the exit plane of the exhaust pipe to create a plurality of outer diffusion ports around at least a portion of the outer perimeter of the body when coupled to the exhaust pipe, and one or more extension flaps extending from at least a portion of the outer perimeter of the body.

Abstract: An exhaust mixer (16) is provided for use in an engine exhaust system (10) downstream from an additive injector (14). The mixer (16) includes eight vanes (20), with four of the vanes (20A) extending from a first side (22) of the mixer (16) and arranged in an equally spaced circumferential array around a central axis (24), and the other four of the vanes (20B) extending from an opposite side (26) of the mixer (16) and arranged opposite from the other four vanes (20A) in an equally spaced circumferential array.

Abstract: An object of the invention is to provide an exhaust emission control device capable of favorably dispersing urea water for improved mixing with exhaust gas even if a flow rate of the exhaust gas is increased. An entry end of a mixing pipe is formed with a first opening at a position near an exit side of a particulate filter and is formed with a second opening at a position away from the exit side of the particulate filter and diametrically opposite to the first opening. Arranged in a downstream end of a gas gathering chamber are a first partition which guides all of the flow of exhaust gas from the particulate filter into a one-way swirling flow around the entry end of the mixing pipe, a second partition which divides the flow of the exhaust gas guided by the first partition into two to cause an inner one of the divided swirling flows to tangentially enter into the first opening and a third partition which causes the remaining outer swirling flow to tangentially enter into the second opening.

Abstract: A static mixing element, in particular for arrangement in an exhaust system of an internal combustion engine, has a grid-like component having a flow therethrough. The grid-like component is formed in one piece from an elongated metal strip. In the production of the static mixing element, the metal strip is bent to form the grid-like component.

Abstract: An exhaust mixer (16) is provided for use in an engine exhaust system (10) downstream from an additive injector (14). The mixer (16) includes eight vanes (20), with four of the vanes (20A) extending from a first side (22) of the mixer (16) and arranged in an equally spaced circumferential array around a central axis (24), and the other four of the vanes (20B) extending from an opposite side (26) of the mixer (16) and arranged opposite from the other four vanes (20A) in an equally spaced circumferential array. The vanes (20) include embossed ribs (60) and mount flanges (64).

Abstract: A device for storing or supplying an operating fluid includes a tank with an interior space and a protrusion which protrudes into the interior space and has a circumferential surface. At least one electrode for determining a filling level is disposed radially, running around the circumferential surface. Methods for mounting such a device and for monitoring a reserve filling level as well as a motor vehicle are also provided.

Abstract: The invention provides an exhaust gas purification apparatus for an internal combustion engine which evenly diffuses a reducing agent over an entirety of the exhaust gas which flows into an NOx catalyst disposed on the downstream side of thereof. The exhaust gas purification apparatus includes an NOx catalyst disposed in an exhaust gas passage of an internal combustion engine, and a reducing agent injecting unit for injecting the reducing agent into the exhaust gas passage which is on an upstream side of the NOx catalyst. A narrowed portion, in which a cross-sectional area of a flow passage is smaller than a cross-sectional area of the exhaust gas passage and of the NOx catalyst, is provided on a downstream side of an injecting position by the reducing agent injecting unit and the upstream side of the NOx catalyst, and a reducing agent diffusing device is provided on the narrowed portion.

Abstract: A flow diffuser for vehicles of the type having an engine and an exhaust pipe generally includes a body having a first end configured for attachment to an exhaust pipe, and a diffusion portion including first and second diffusion sections, and a plurality of diversion wings disposed within the body.

Abstract: A device for providing liquid reducing agent includes a tank with an interior space and a vessel disposed at least partially in the interior space of the tank. The vessel is at least partially surrounded on the outside by a filter having a filter surface and a filter depth. A delivery unit disposed in the vessel is configured to deliver reducing agent from the tank, through the filter and to an extraction point for reducing agent. A motor vehicle having the device is also provided.

Abstract: A method for operating a reducing agent delivery unit having a tank, a feed line running from the tank to an addition point, a return line branching off from the feed line and a valve to be activated with an electrical current for closing off the return line, includes initially applying an activation current to the valve for a first time interval. Subsequently, a holding current is applied to the valve when the first time interval has elapsed. Then, an operating variable of the delivery unit is determined and at least the activation current, the holding current and/or the first time interval are adapted as a function of the determined operating variable. A motor vehicle having a delivery unit is also provided.

Abstract: The invention relates to systems and methods for heating a solid or liquid reducing material such as an urea-containing material for NOx selective catalytic reduction (‘SCR’) using a heat stored in a thermal energy storage material, such as a phase change material. The stored heat may be heat from an exhaust waste, such as from an exhaust gas of an internal combustion engine. The reducing material may be a solid reducing material. Other reducing materials include aqueous solutions such as an aqueous solution containing, consisting essentially of, or consisting of urea and water. In one aspect, the process may include a step of evaporating an aqueous solution of urea for immediate urea hydrolysis.

Abstract: An exhaust emission control device has a particulate filter 5 and a selective reduction catalyst 6 arranged side by side. An S-shaped communication passage 9 is arranged for introduction of exhaust gas 3 from a rear end of the filter 5 to a front end of the adjacent catalyst 6 in a forward fold-back manner and with a urea water addition injector 11 arranged midway of the passage 9. In order to satisfactorily disperse the urea water with enhanced mixing with the exhaust gas 3 even if the flow rate is increased, slits 12 are formed in circumferentially spaced positions on a rear end of a mixing pipe 9B constituting an upstream portion of the communication passage 9 so as to introduce the exhaust gas 3. A downstream end 9a of a gas gathering chamber 9A is connected to the rear end of the mixing pipe 9B such that the slits 12 are encased and the rear end of the mixing pipe 9B is closed.

Abstract: Disclosed is a method for preventing fuel freezing in a postprocessing burner system with a burner 14 upstream of a particulate filter 12 (exhaust purification member) incorporated in an exhaust pipe. Fuel is fed from a fuel tank 16 served also for a diesel engine 1 (engine) to the burner 14 through a feed pipe 17, and excess fuel is returned to the fuel tank 16 through a return pipe 18. The fuel is periodically circulated between the burner 14 and the fuel tank 16 through the feed and return pipes 17 and 18 under a condition of ambient air temperature during vehicle travel being at or below a predetermined temperature.

Abstract: An exhaust gas cooling apparatus and method for cooling an exhaust gas is provided. The exhaust cooling apparatus has a first fluid conduit and a variable nozzle extending from the first fluid conduit. The variable nozzle being disposed in an inlet end of a second fluid conduit, wherein the variable nozzle has at least two dissimilar materials adjacent to each other and a fluid inlet opening is located between an outer periphery of the variable nozzle and an inner surface of the inlet end of the second fluid conduit. The at least two dissimilar materials vary the size of an opening of the variable nozzle by moving toward or away from a center line of the first fluid conduit in response to a temperature of an exhaust gas flowing through the first fluid conduit.

Abstract: Embodiments of the invention are directed to an exhaust system for a combustion engine with a bent pipe section conducting an exhaust gas flow. The exhaust system further includes an injector for introducing a liquid reduction agent into the exhaust gas flow, which is connected to the pipe section via a connecting pipe so that the injector can introduce the reduction agent through the connecting pipe into an introduction region of the pipe section into the exhaust gas flow. The risk of a crystallisation of the reduction agent can be reduced with a return flow plate, which in the pipe section is arranged upstream of the introduction region.

Abstract: A vehicle can include an engine, an air cleaner for supplying air taken in by the engine, an exhaust passage for exhausting exhaust gas of the engine, and a secondary air passage for connecting the air cleaner to the exhaust passage and for supplying secondary air to the exhaust passage. A one-way valve can be disposed in the secondary air passage. A resonator portion can be interposed between the air cleaner and the one-way valve. The resonator portion can branch from the secondary air passage and can include a closed space. A water drain portion can be disposed in the closed space of the resonator portion.

Abstract: An exhaust system including an exhaust emission control device with a post treatment unit (e.g., a selective reduction catalyst) for depuration of exhaust gas flowing therethrough is disclosed. The exhaust system includes a layout that introduces the exhaust gas into the post-treatment unit through a turnabout. An introductory part encircles an inlet end of the post-treatment unit and receives the exhaust gas through an exhaust inlet port from a direction substantially perpendicular to an axis of the selective reduction catalyst. The introduction part is formed with a first depression cambered away from the inlet end of the selective reduction catalyst and approaching toward the inlet end of the selective reduction catalyst as the first depression extends away from the exhaust inlet port and toward an introduction direction of the exhaust gas, thereby promoting uniformity of the exhaust gas flow entering the post-treatment unit.

Abstract: An exhaust heat recovery device with which a coolant medium in a heat exchanger can be prevented from reaching high temperatures is provided. An exhaust heat recovery system 10 is provided with an heat exchanger 18 that performs heat exchange between exhaust gas and a coolant medium; and a natural convection water pipe 56 whose one end is connected to an upper portion in the direction of gravity of an engine coolant water pipe 42 in the heat exchanger 18 and whose other end is connected to a lower portion in the direction of gravity of the engine coolant water pipe 42, and whose intermediate portion is positioned at the outer side of the heat exchanger 18.

Abstract: In an internal combustion engine having several combustion chambers formed in in-line cylinders wherein an air/fuel mixture can be combusted and which include a common cylinder head, with discharge passages formed within the cylinder head and extending to a common confluence zone in communication with a discharge manifold, the common confluence zone is delimited on a first side (A) by at least one cylinder head wall and a separate shell element on a second side mounted to the outside of the cylinder head, the shell element being curved funnel-like for conducting the exhaust gas away from the engine.

Abstract: An exhaust diluting and diffusing apparatus includes a pipe mountable on a exhaust stack pipe, and having a flared skirt inlet to define an annular inlet, a mixing section adjacent the inlet, and an exhaust section formed as a pipe section with a multiplicity of holes. The apparatus pipe has a diameter greater than the diameter of the exhaust stack on which it is mounted.

Abstract: An apparatus for cooling overheated gas generated from a diesel particulate filter which is connected between a diesel engine and an exhaust pipe of the diesel engine is disclosed. The apparatus includes a tail pipe for discharging outwardly the overheated gas discharged from the diesel particulate filter, a cooling fan, provided at one side of an engine room, for generating an air stream by sucking ambient air, and a diffuser enclosing an outer circumference of the tail pipe in such a way a space is formed between the diffuser and the tail pipe to prevent the diffuser from directly contacting the tail pipe. The engine room is provided with a through-hole penetrating one side of the engine room, and the tail pipe has one end connected to the diesel particulate filter, and the other end extended outwardly from the engine room through the through-hole.

Abstract: An apparatus for separating a liquid from a mixed gas stream can include a wall, a mixed gas stream passageway, and a liquid collection assembly. The wall can include a first surface, a second surface, and a plurality of capillary condensation pores. The capillary condensation pores extend through the wall, and have a first opening on the first surface of the wall, and a second opening on the second surface of the wall. The pore size of the pores can be between about 2 nm to about 100 nm. The mixed gas stream passageway can be in fluid communication with the first opening. The liquid collection assembly can collect liquid from the plurality of pores.

Abstract: An exhaust cooling device (10) is provided for an exhaust pipe (12) of a combustion process. The cooling device (10) includes a tubular housing (20) having an upstream portion (16) and a downstream portion (18), with the upstream portion (16) having a necked-down section (24) tapered in an upstream direction, and a plurality of openings (30) formed in the necked-down section (24) to allow an ambient air flow from an exterior of the tubular housing (20) to an interior of the tubular housing (20). The cooling device (10) further includes a nozzle element (22) fixed in the necked-down section (24) to direct an exhaust gas flow into the tubular housing (20).

Abstract: The disclosure relates to reciprocating fluid working devices including internal combustion engines, compressors and pumps. A number of arrangements for pistons and cylinders of unconventional configuration are described, mostly intended for use in IC engines operating without cooling. Included are toroidal combustion or working chambers, some with fluid flow through the core of the toroid, a single piston reciprocating between a pair of working chambers, tensile valve actuation, tensile links between piston and crankshaft, energy absorbing piston-crank links, crankshafts supported on gas bearings, cylinders rotating in housings, injectors having components which reciprocate or rotate during fuel delivery. In some embodiments pistons mare rotate while reciprocating. High temperature exhaust emissions systems are described, including those containing filamentary material, as are procedures for reducing emissions during cold start by means of valves at reaction volume exit.

Abstract: An object of the invention is to provide an exhaust emission control device which eliminates the use of a heat-retention structure using heat-insulating material such as glass wool so as to attain substantial lessening in production cost. A discharge end of a gas gathering chamber is connected to an entry end of a mixing pipe so as to encase the entry end of the mixing pipe and close an opened end face in a required spaced-apart relationship. Moreover, a side surface of the entry end of the mixing pipe adjacent to the discharge side of the particulate filter is formed with an opening; and gas guide passages are formed in the gas gathering chamber by guide fins for tangential introduction of all of the exhaust gas from the discharge side of the particulate filter to the opening. An extra space isolated from the gas guide passages is ensured in the gas gathering chamber as a heat-retention chamber surrounding the entry end of the mixing pipe.

Abstract: A mixing device comprises a circular disc of fin sections positioned so as to create openings in the inner and outer regions of the mixing device that generate oppositely rotating flows of exhaust gas. Each fin section may be identical, and may be created by a stamping process. The smooth surface of each fin section reduces creases, and thus, is less prone to urea buildup.

Abstract: An internal combustion engine has at least one combustion chamber and an exhaust gas system arranged on an exhaust gas outlet port. The exhaust gas system includes at least one secondary air injection device for injecting secondary air into the exhaust system between the combustion chamber and an exhaust emission control system arranged in the exhaust gas system. During operation of the internal combustion engine, a residual gas content in the combustion chamber can be changed. The secondary air injection site on the exhaust gas system is arranged so far from the combustion chamber that injected secondary air flows back into the exhaust gas outlet port due to back-flowing exhaust gas in the exhaust gas system but does not flow back into the combustion chamber. This makes it possible to comply with SULEV emission limits even for engines having many combustion chambers and/or exhaust gas turbochargers.

Abstract: An additive-agent diffusion plate structure in an exhaust passage for an engine includes: an injection port that injects an additive agent, and that is disposed so that the injected additive agent crosses the exhaust passage; and an additive-agent diffusion plate that diffuses the additive agent injected from the injection port into the exhaust passage, at a position upstream of an exhaust gas purification device disposed in the exhaust passage. The additive-agent diffusion plate includes: a bottom wall that is disposed to extend in an exhaust-gas flow direction in which exhaust gas flows; a collision portion with which the additive agent injected into the exhaust passage collides; and a passage portion that is open behind the collision portion, when the additive-agent diffusion plate is seen from a position of the injection port.

Abstract: An arrangement is provided for feeding a liquid additive from a receptacle into a fuel pipe or into an exhaust line of an internal-combustion engine of a motor vehicle. The receptacle is fillable with additive from a larger storage tank that is also accommodated in the motor vehicle by way of a connection line that can be blocked by a shut-off element. A pump is installed in the receptacle or in the connection line. A heating device for heating at least a partial volume of the additive is present in the receptacle. A blockable return line branches off into the receptacle from the connection line between the pump and the shut-off element.

Abstract: An exhaust Venturi apparatus, system, and method includes an elongate housing for passage of exhaust gases, a Venturi mechanism disposed on the housing, the Venturi mechanism configured to create a low-pressure zone in the exhaust gases within the housing, and an aperture disposed in a side of the housing downstream of the Venturi mechanism, such that secondary air outside the housing is drawn into the exhaust stream. The aperture may comprise one or a plurality of apertures, small in cross-section compared to the housing cross-section, for minimizing sound emanating from the exhaust system. The Venturi mechanism may comprise a Venturi plate mounted between the housing and the engine.