US20110099990A1 - Assembly for cooling an exhaust gas stream - Google Patents
Assembly for cooling an exhaust gas stream Download PDFInfo
- Publication number
- US20110099990A1 US20110099990A1 US12/874,623 US87462310A US2011099990A1 US 20110099990 A1 US20110099990 A1 US 20110099990A1 US 87462310 A US87462310 A US 87462310A US 2011099990 A1 US2011099990 A1 US 2011099990A1
- Authority
- US
- United States
- Prior art keywords
- exhaust gas
- outlet nozzle
- assembly
- gas pipe
- gas stream
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2270/00—Mixing air with exhaust gases
- F01N2270/02—Mixing air with exhaust gases for cooling exhaust gases or the apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives
Definitions
- the present invention relates to an assembly for cooling an exhaust gas stream.
- soot particle discharge is restricted by using soot particle filters, as a rule with “wall-flow filters”, in which the engine exhaust gas passes through a porous filter wall of a ceramic or metallic material.
- soot particle filters as a rule with “wall-flow filters”, in which the engine exhaust gas passes through a porous filter wall of a ceramic or metallic material.
- the soot particles contained in the engine exhaust gas become deposited both on the surface of and also inside the filter wall, such that the exhaust gas back-pressure increases as the degree of clogging of the filter wall increases.
- the deposited soot particles are therefore burned off at regular intervals, for which purpose the temperature of the engine exhaust gas is increased from time to time to temperatures of over 600° C., for example using an oxidation catalytic converter connected upstream of the soot particle filter.
- the regeneration phases of the soot particle filter correspondingly high exhaust gas temperatures may occur at the exhaust tail pipe of the exhaust gas system, which may possibly constitute a hazard for nearby vehicle components, objects or people.
- WO 2008/060559 A2 discloses a device for reducing the exhaust gas temperature at an exhaust tail pipe.
- the device which may be fitted to the exhaust tail pipe by means of a clip or clamp, comprises a nozzle, which is fitted by means of a plurality of radially arranged holding struts in such a way on an adjoining diverter housing that, on passage of the exhaust gas stream, a partial vacuum for drawing in cooler ambient air may be produced in an inlet formed between the nozzle and the diverter housing.
- the shape of the nozzle or of the diverter housing which shape tapers in the passage direction of the exhaust gas stream, leads to an undesired increase in the exhaust gas back-pressure in the exhaust gas system.
- an object of this invention is to provide an exhaust gas cooling assembly which prevents an undesired increase in the exhaust gas back-pressure during regeneration phases of the soot particle filter.
- an assembly for cooling an exhaust gas stream includes an outlet nozzle exposed to the exhaust gas stream.
- the outlet nozzle projects into an open end of an adjacent exhaust gas pipe so that a reduced pressure relative to the surrounding environment is produced in a suction region between the outlet nozzle and the exhaust gas pipe due to the flow of the exhaust gas stream.
- an adjusting device is provided for varying the flow cross section of the outlet nozzle.
- the reduced pressure is produced by the Venturi principle, the outlet nozzle extending into the open end of the exhaust gas pipe and producing a reduced pressure in the suction region as a function of the flow cross section.
- the ambient air drawn into the exhaust gas pipe due to the reduced pressure leads in the process, depending on the temperature thereof, to corresponding cooling of the exhaust gas stream.
- the flow cross section of the outlet nozzle may be enlarged by the adjusting device such that the exhaust gas stream can pass through unhindered. In this way, an undesired increase in the exhaust gas back-pressure may be restricted to the regeneration phases of the soot particle filter.
- the assembly has a particularly simple structure which fits compactly in the region of the soot particle filter inside an engine compartment of a diesel-engine powered motor vehicle, such as an agricultural utility vehicle. Cooling of the diesel engine is conventionally achieved by a high temperature heat exchanger arranged in the engine compartment of the motor vehicle, which heat exchanger is a component of a liquid cooling circuit connected with the diesel engine. The high temperature heat exchanger is exposed to cooling air by a fan unit. Cooling air is drawn from the surrounding environment by way of a radiator grille and downstream filter inserts. Since the air conveyed in this way into the engine compartment is largely free of contaminants, undesired clogging of the suction region formed between the outlet nozzle and the exhaust gas pipe is reliably avoided. In addition, the compression of the air located in the engine compartment by the fan unit, leads to an increased volumetric flow rate in the suction region and thus to more efficient cooling of the exhaust gas stream.
- the flow cross section of the outlet nozzle is preferably varied as a function of the exhaust gas temperature.
- the outlet nozzle may comprise a plurality of flexible fins for varying the flow cross section.
- the fins take the form for example of finger-shaped baffle plates, which are one-piece components of a fastening strip mountable on an outlet connector of the soot particle filter, the baffle plates projecting towards the exhaust gas stream when fitted.
- the outlet connector is in particular a fixed component of a filter housing surrounded by the soot particle filter and is welded or otherwise firmly connected thereto.
- the fins are preferably bimetallic elements, which assume a curvature which reduces the flow cross section of the outlet nozzle as the exhaust gas temperature increases.
- the bimetallic elements constitute an adjusting device for temperature-dependent variation of the flow cross section of the outlet nozzle.
- the structure of such bimetallic elements is known in principle. Accordingly, they consist of a metal strip, which comprises two joined-together metal layers with different coefficients of longitudinal expansion.
- the fins are preferably configured so that they rest against the open end of the exhaust gas pipe when the exhaust gas temperature is below a predetermined threshold value. In this case the fins adopt a fully open position.
- the threshold value is preset such that it is below the exhaust gas temperatures in the range of from 400 to 600° C. typically occurring during the regeneration phase of the soot particle filter.
- a limiting member is provided at the open end of the exhaust gas pipe for the fins to rest on.
- the limiting members form of a stop lip extending around the inside of the open end of the exhaust gas pipe.
- the stop lip forms a flange at the open end of the exhaust gas pipe.
- a heat-resistant seal in the form of a braided glass or ceramic fibre cord may additionally be introduced into the flange.
- the fins may be arranged overlapping in the manner of a diaphragm in the circumferential direction of the outlet nozzle. The overlap reliably prevents an undesired release of exhaust gases in the region of the outlet nozzle.
- the exhaust gas pipe is surrounded at least in places by a touch guard.
- the touch guard takes the form in particular of a tubular cover, which is fitted along the outside of the exhaust gas pipe by means of a plurality of spacers.
- the tubular cover may include a plurality of openings at least in the region of an exhaust tail pipe, which allow circulation of the air present between the exhaust gas pipe and the tubular cover.
- FIG. 1 is a perspective view of an exhaust gas cooling assembly according to the invention, mounted on a vehicle;
- FIG. 2 is a detailed view of the assembly of FIG. 1 , during a regeneration phase of the soot particle filter;
- FIG. 3 is a detailed view of the assembly of FIG. 1 outside a regeneration phase of the soot particle filter.
- an agricultural utility vehicle 10 such as a tractor, includes a soot particle filter 14 accommodated in an engine compartment 12 .
- the soot particle filter is a conventional wall-flow filter.
- the exhaust gas produced by a diesel engine 16 of the vehicle 10 passes through a porous filter wall of a ceramic or metallic material.
- the soot particles contained in the engine exhaust gas become deposited both on the surface of and also inside the filter wall of the soot particle filter 14 .
- the deposited soot particles are burned at regular intervals to regenerate the soot particle filter 14 , for which purpose the temperature of the engine exhaust gas is increased from time to time to temperatures of over 600° C. using an oxidation catalytic converter connected upstream of the soot particle filter 14 .
- the assembly 20 To cool the exhaust gas stream 18 emerging from the soot particle filter 14 and heated during the regeneration phase, the assembly 20 includes an outlet connector 22 formed on the soot particle filter 14 for conveying out the filtered exhaust gas stream 18 .
- An outlet nozzle 24 fitted on the outlet connector 22 and exposed to the exhaust gas stream 18 projects into an open end 26 of an adjacent exhaust gas pipe 28 so that a reduced pressure relative to the surrounding environment 32 is produced in a suction region 30 between the outlet nozzle 24 and the exhaust gas pipe 28 by the flow of the exhaust gas stream 18 , as best seen in FIG. 2 .
- the reduced pressure is produced by the Venturi principle, the outlet nozzle 24 extending into the open end 26 of the exhaust gas pipe 28 and producing a reduced pressure in the suction region 30 as a function of the respective flow cross section.
- Ambient air 34 is drawn into the exhaust gas pipe 28 due to the reduced pressure leads in the process, depending on the temperature thereof, to cool the exhaust gas stream 18 .
- the outlet nozzle 24 includes a plurality of flexible fins 36 for varying the flow cross section.
- the fins are arranged overlapping in the manner of a diaphragm in the circumferential direction of the outlet nozzle 24 .
- the fins 36 take the form of finger-shaped baffle plates, which are one-piece components of a fastening strip 40 mounted on an outlet connector 22 by means of a clamping screw 38 .
- the baffle plates project towards the exhaust gas stream 18 when fitted.
- the outlet connector 22 is a fixed component of a filter housing 42 surrounded by the soot particle filter 14 and is welded or otherwise firmly connected thereto.
- the fins 36 are bimetallic elements, which assume a curvature which reduces the flow cross section of the outlet nozzle 24 as the exhaust gas temperature increases.
- the bimetallic elements constitute an adjusting device 44 for varying the flow cross section of the outlet nozzle 24 as a function of the exhaust gas temperature.
- the fins 36 are configured so that they rest against the open end 26 of the exhaust gas pipe 28 when the exhaust gas temperature is below a predetermined threshold value. In this case, the fins 36 adopt a completely open position, to allow the exhaust gas stream 18 to pass through unhindered, as best seen in FIG. 3 .
- the threshold value is preset below the exhaust gas temperatures in the range of from 400 to 600° C. typically occurring during the regeneration phase of the soot particle filter 14 .
- a limiting member 46 is provided for the fins 36 to rest on.
- the limiting member 46 takes the form of a stop lip 50 extending around the inside 48 of the open end 26 of the exhaust gas pipe 28 .
- the stop lip 50 comprises for example a flange formed at the open end 26 of the exhaust gas pipe 28 .
- a heat-resistant seal 52 in the form of a braided glass or ceramic fibre cord may additionally be introduced into the flange.
- the exhaust gas pipe 28 is surrounded at least in places by a touch guard 54 .
- the touch guard 54 is a tubular cover 56 , which is fitted along the outside of the exhaust gas pipe 28 by means of a plurality of spacers (not shown).
- the tubular cover 56 comprises a plurality of openings 60 at least in the region of an exhaust tail pipe 58 , which allow circulation of the air present between the exhaust gas pipe 28 and the tubular cover 56 .
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Silencers (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
An assembly for cooling an exhaust gas stream includes an outlet nozzle exposed to the exhaust gas stream. The outlet nozzle projects into an open end of an adjacent exhaust gas pipe so that a reduced pressure relative to the surrounding environment is produced in a suction region between the outlet nozzle and the exhaust gas pipe by flow of exhaust gas. Adjusting members vary the flow cross section of the outlet nozzle.
Description
- The present invention relates to an assembly for cooling an exhaust gas stream.
- The exhaust gas standards enacted by the European Union provide for a gradual reduction in the soot particles produced by diesel engines and discharged into the environment with the engine exhaust gas. Soot particle discharge is restricted by using soot particle filters, as a rule with “wall-flow filters”, in which the engine exhaust gas passes through a porous filter wall of a ceramic or metallic material. In so doing, the soot particles contained in the engine exhaust gas become deposited both on the surface of and also inside the filter wall, such that the exhaust gas back-pressure increases as the degree of clogging of the filter wall increases. To regenerate the soot particle filter, the deposited soot particles are therefore burned off at regular intervals, for which purpose the temperature of the engine exhaust gas is increased from time to time to temperatures of over 600° C., for example using an oxidation catalytic converter connected upstream of the soot particle filter. During the regeneration phases of the soot particle filter correspondingly high exhaust gas temperatures may occur at the exhaust tail pipe of the exhaust gas system, which may possibly constitute a hazard for nearby vehicle components, objects or people.
- Against this background, WO 2008/060559 A2 discloses a device for reducing the exhaust gas temperature at an exhaust tail pipe. The device, which may be fitted to the exhaust tail pipe by means of a clip or clamp, comprises a nozzle, which is fitted by means of a plurality of radially arranged holding struts in such a way on an adjoining diverter housing that, on passage of the exhaust gas stream, a partial vacuum for drawing in cooler ambient air may be produced in an inlet formed between the nozzle and the diverter housing. However, the shape of the nozzle or of the diverter housing, which shape tapers in the passage direction of the exhaust gas stream, leads to an undesired increase in the exhaust gas back-pressure in the exhaust gas system.
- Accordingly, an object of this invention is to provide an exhaust gas cooling assembly which prevents an undesired increase in the exhaust gas back-pressure during regeneration phases of the soot particle filter.
- This and other objects are achieved by the present invention, wherein an assembly for cooling an exhaust gas stream includes an outlet nozzle exposed to the exhaust gas stream. The outlet nozzle projects into an open end of an adjacent exhaust gas pipe so that a reduced pressure relative to the surrounding environment is produced in a suction region between the outlet nozzle and the exhaust gas pipe due to the flow of the exhaust gas stream. Furthermore, an adjusting device is provided for varying the flow cross section of the outlet nozzle.
- More precisely, the reduced pressure is produced by the Venturi principle, the outlet nozzle extending into the open end of the exhaust gas pipe and producing a reduced pressure in the suction region as a function of the flow cross section. The ambient air drawn into the exhaust gas pipe due to the reduced pressure leads in the process, depending on the temperature thereof, to corresponding cooling of the exhaust gas stream.
- Since the addition of cooler ambient air is needed only during the regeneration phases of the soot particle filter, during the other operating phases of the soot particle filter the flow cross section of the outlet nozzle may be enlarged by the adjusting device such that the exhaust gas stream can pass through unhindered. In this way, an undesired increase in the exhaust gas back-pressure may be restricted to the regeneration phases of the soot particle filter.
- The assembly has a particularly simple structure which fits compactly in the region of the soot particle filter inside an engine compartment of a diesel-engine powered motor vehicle, such as an agricultural utility vehicle. Cooling of the diesel engine is conventionally achieved by a high temperature heat exchanger arranged in the engine compartment of the motor vehicle, which heat exchanger is a component of a liquid cooling circuit connected with the diesel engine. The high temperature heat exchanger is exposed to cooling air by a fan unit. Cooling air is drawn from the surrounding environment by way of a radiator grille and downstream filter inserts. Since the air conveyed in this way into the engine compartment is largely free of contaminants, undesired clogging of the suction region formed between the outlet nozzle and the exhaust gas pipe is reliably avoided. In addition, the compression of the air located in the engine compartment by the fan unit, leads to an increased volumetric flow rate in the suction region and thus to more efficient cooling of the exhaust gas stream.
- The flow cross section of the outlet nozzle is preferably varied as a function of the exhaust gas temperature. In particular, provision may be made for the flow cross section to be enlarged by the adjusting device in the case of exhaust gas temperatures typically arising during a regeneration phase of the soot particle filter.
- The outlet nozzle may comprise a plurality of flexible fins for varying the flow cross section. The fins take the form for example of finger-shaped baffle plates, which are one-piece components of a fastening strip mountable on an outlet connector of the soot particle filter, the baffle plates projecting towards the exhaust gas stream when fitted. The outlet connector is in particular a fixed component of a filter housing surrounded by the soot particle filter and is welded or otherwise firmly connected thereto.
- The fins are preferably bimetallic elements, which assume a curvature which reduces the flow cross section of the outlet nozzle as the exhaust gas temperature increases. In other words, the bimetallic elements constitute an adjusting device for temperature-dependent variation of the flow cross section of the outlet nozzle. The structure of such bimetallic elements is known in principle. Accordingly, they consist of a metal strip, which comprises two joined-together metal layers with different coefficients of longitudinal expansion.
- The fins are preferably configured so that they rest against the open end of the exhaust gas pipe when the exhaust gas temperature is below a predetermined threshold value. In this case the fins adopt a fully open position. The threshold value is preset such that it is below the exhaust gas temperatures in the range of from 400 to 600° C. typically occurring during the regeneration phase of the soot particle filter.
- A limiting member is provided at the open end of the exhaust gas pipe for the fins to rest on. The limiting members form of a stop lip extending around the inside of the open end of the exhaust gas pipe. The stop lip forms a flange at the open end of the exhaust gas pipe. A heat-resistant seal in the form of a braided glass or ceramic fibre cord may additionally be introduced into the flange.
- Moreover, the fins may be arranged overlapping in the manner of a diaphragm in the circumferential direction of the outlet nozzle. The overlap reliably prevents an undesired release of exhaust gases in the region of the outlet nozzle.
- Preferably, the exhaust gas pipe is surrounded at least in places by a touch guard. The touch guard takes the form in particular of a tubular cover, which is fitted along the outside of the exhaust gas pipe by means of a plurality of spacers. To prevent overheating of the exhaust gas pipe, the tubular cover may include a plurality of openings at least in the region of an exhaust tail pipe, which allow circulation of the air present between the exhaust gas pipe and the tubular cover.
-
FIG. 1 is a perspective view of an exhaust gas cooling assembly according to the invention, mounted on a vehicle; -
FIG. 2 is a detailed view of the assembly ofFIG. 1 , during a regeneration phase of the soot particle filter; and -
FIG. 3 is a detailed view of the assembly ofFIG. 1 outside a regeneration phase of the soot particle filter. - Referring to
FIG. 1 , anagricultural utility vehicle 10, such as a tractor, includes asoot particle filter 14 accommodated in anengine compartment 12. The soot particle filter is a conventional wall-flow filter. The exhaust gas produced by adiesel engine 16 of thevehicle 10 passes through a porous filter wall of a ceramic or metallic material. In the process, the soot particles contained in the engine exhaust gas become deposited both on the surface of and also inside the filter wall of thesoot particle filter 14. Since the exhaust gas back-pressure increases as the degree of clogging of the filter wall increases, the deposited soot particles are burned at regular intervals to regenerate thesoot particle filter 14, for which purpose the temperature of the engine exhaust gas is increased from time to time to temperatures of over 600° C. using an oxidation catalytic converter connected upstream of thesoot particle filter 14. - To cool the
exhaust gas stream 18 emerging from thesoot particle filter 14 and heated during the regeneration phase, theassembly 20 includes anoutlet connector 22 formed on thesoot particle filter 14 for conveying out the filteredexhaust gas stream 18. Anoutlet nozzle 24 fitted on theoutlet connector 22 and exposed to theexhaust gas stream 18 projects into anopen end 26 of an adjacentexhaust gas pipe 28 so that a reduced pressure relative to the surroundingenvironment 32 is produced in asuction region 30 between theoutlet nozzle 24 and theexhaust gas pipe 28 by the flow of theexhaust gas stream 18, as best seen inFIG. 2 . - More precisely, the reduced pressure is produced by the Venturi principle, the
outlet nozzle 24 extending into theopen end 26 of theexhaust gas pipe 28 and producing a reduced pressure in thesuction region 30 as a function of the respective flow cross section.Ambient air 34 is drawn into theexhaust gas pipe 28 due to the reduced pressure leads in the process, depending on the temperature thereof, to cool theexhaust gas stream 18. - Furthermore, the
outlet nozzle 24 includes a plurality offlexible fins 36 for varying the flow cross section. The fins are arranged overlapping in the manner of a diaphragm in the circumferential direction of theoutlet nozzle 24. Thefins 36 take the form of finger-shaped baffle plates, which are one-piece components of afastening strip 40 mounted on anoutlet connector 22 by means of aclamping screw 38. The baffle plates project towards theexhaust gas stream 18 when fitted. Theoutlet connector 22 is a fixed component of afilter housing 42 surrounded by thesoot particle filter 14 and is welded or otherwise firmly connected thereto. - The
fins 36 are bimetallic elements, which assume a curvature which reduces the flow cross section of theoutlet nozzle 24 as the exhaust gas temperature increases. In other words, the bimetallic elements constitute an adjustingdevice 44 for varying the flow cross section of theoutlet nozzle 24 as a function of the exhaust gas temperature. - Moreover, the
fins 36 are configured so that they rest against theopen end 26 of theexhaust gas pipe 28 when the exhaust gas temperature is below a predetermined threshold value. In this case, thefins 36 adopt a completely open position, to allow theexhaust gas stream 18 to pass through unhindered, as best seen inFIG. 3 . The threshold value is preset below the exhaust gas temperatures in the range of from 400 to 600° C. typically occurring during the regeneration phase of thesoot particle filter 14. - At the
open end 26 of the exhaust gas pipe 28 a limitingmember 46 is provided for thefins 36 to rest on. The limitingmember 46 takes the form of astop lip 50 extending around theinside 48 of theopen end 26 of theexhaust gas pipe 28. Thestop lip 50 comprises for example a flange formed at theopen end 26 of theexhaust gas pipe 28. A heat-resistant seal 52 in the form of a braided glass or ceramic fibre cord may additionally be introduced into the flange. - According to
FIG. 1 , theexhaust gas pipe 28 is surrounded at least in places by atouch guard 54. Thetouch guard 54 is atubular cover 56, which is fitted along the outside of theexhaust gas pipe 28 by means of a plurality of spacers (not shown). To prevent overheating of theexhaust gas pipe 28, thetubular cover 56 comprises a plurality ofopenings 60 at least in the region of anexhaust tail pipe 58, which allow circulation of the air present between theexhaust gas pipe 28 and thetubular cover 56. - While the present invention has been described in conjunction with a specific embodiment, it is understood that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. For example, although the
vehicle 10 shown inFIG. 1 is a tractor, it is likewise feasible for theassembly 20 according to the invention to be used with any other desired diesel-engined motor vehicles. In addition, it may also be used in stationary applications, such as for example a diesel-engined power generator or the like. Accordingly, this invention is intended to embrace all such alternatives, modifications and variations which fall within the spirit and scope of the appended claims.
Claims (7)
1. A assembly for cooling an exhaust gas stream, having an outlet nozzle exposed to the exhaust gas stream, the outlet nozzle projecting into an open end of an adjacent exhaust gas pipe so that a reduced pressure relative to the surrounding environment is produced in a suction region between the outlet nozzle and the exhaust gas pipe as a result of exhaust gas flow, characterized by:
the outlet nozzle comprises adjusting members for varying a flow cross section of the outlet nozzle.
2. The assembly according of claim 1 , wherein:
the adjusting members vary the flow cross section as a function of an exhaust gas temperature.
3. The assembly of claim 1 , wherein:
the outlet nozzle comprises a plurality of flexible fins for varying the flow cross section.
4. The assembly of claim 3 , wherein:
the fins comprise bimetallic elements, which assume a curvature which reduces the flow cross section of the outlet nozzle as the exhaust gas temperature increases.
5. The assembly of claim 3 , wherein:
the fins rest against an open end of the exhaust gas pipe when the exhaust gas stream temperature is below a predetermined threshold value.
6. The assembly of claim 3 , wherein:
the open end of the exhaust gas pipe includes a limiting member; and
the fins rest on the limiting member.
7. The assembly of claim 1 , wherein:
a portion of the exhaust gas pipe is surrounded by a touch guard.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009046253A DE102009046253A1 (en) | 2009-10-30 | 2009-10-30 | Device for cooling an exhaust gas flow |
DE102009046253.8 | 2009-10-30 |
Publications (1)
Publication Number | Publication Date |
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US20110099990A1 true US20110099990A1 (en) | 2011-05-05 |
Family
ID=43530125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/874,623 Abandoned US20110099990A1 (en) | 2009-10-30 | 2010-09-02 | Assembly for cooling an exhaust gas stream |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110099990A1 (en) |
EP (1) | EP2317093A3 (en) |
CN (1) | CN102052134A (en) |
BR (1) | BRPI1013480A2 (en) |
DE (1) | DE102009046253A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US20110258983A1 (en) * | 2010-04-23 | 2011-10-27 | Gm Global Technology Operations, Inc. | Reconfigurable mixer for an exhaust aftertreatment system and method of using the same |
DE102011087675A1 (en) * | 2011-12-02 | 2013-06-06 | Deere & Company | Cooling system for active cooling of an exhaust system |
US20140151143A1 (en) * | 2011-07-19 | 2014-06-05 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Construction machine |
US20140360167A1 (en) * | 2013-06-05 | 2014-12-11 | Caterpillar Global Mining Expanded Products Pty Ltd | System and method for cooling of an aftertreatment module |
US20150033734A1 (en) * | 2013-07-30 | 2015-02-05 | GM Global Technology Operations LLC | Gas flow distributing flexible coupling |
US10358970B2 (en) | 2017-01-17 | 2019-07-23 | Ford Global Technologies, Llc | Cooling assembly for temperature control |
US20200224567A1 (en) * | 2017-10-03 | 2020-07-16 | Volvo Lastvagnar Ab | Process consisting in cooling at least one component, such as a sensor, arranged within a compartment of an exhaust after treatment system of a vehicle |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013019291A (en) * | 2011-07-09 | 2013-01-31 | Tcm Corp | Pipe joint structure of exhaust gas processing device for industrial vehicle |
US8720195B2 (en) | 2012-02-14 | 2014-05-13 | Deere & Company | Exhaust assembly |
CN104165081A (en) * | 2014-07-21 | 2014-11-26 | 昆山晋桦豹胶轮车制造有限公司 | Off-gas dilution device of anti-explosion transportation vehicle with rubber wheels |
CN113123740A (en) * | 2019-12-30 | 2021-07-16 | 四川宏华石油设备有限公司 | Drilling fluid cooling system |
JP2023051491A (en) | 2021-09-30 | 2023-04-11 | 株式会社クボタ | Service vehicle |
EP4361410A1 (en) * | 2022-10-26 | 2024-05-01 | Kubota Corporation | Work vehicle |
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US20080282688A1 (en) * | 2007-05-18 | 2008-11-20 | International Truck Intellectual Property Company, Llc | Engine gas temperature reduction |
US20090282818A1 (en) * | 2008-04-18 | 2009-11-19 | Martin Keller | Tail pipe exhaust cooling device |
US20100000205A1 (en) * | 2008-07-01 | 2010-01-07 | General Motors Global Technology Operations, Inc. | Apparatus and method for cooling an exhaust gas |
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US3143293A (en) * | 1961-04-13 | 1964-08-04 | Universal Oil Prod Co | Variable-area nozzle |
US4227651A (en) * | 1979-07-20 | 1980-10-14 | Abe Luis A P | Nozzle for use on the exhaust of internal combustion engines |
DE3010598C2 (en) * | 1980-03-20 | 1984-05-24 | Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln | Exhaust pipe cooled by ambient air |
GB2240364B (en) * | 1990-01-27 | 1994-09-28 | S & C Thermofluids Ltd | Combustion engines improvements |
US6220387B1 (en) * | 1999-10-21 | 2001-04-24 | Mathew S. Hoppes | Exhaust muffler |
US7284364B2 (en) * | 2003-09-08 | 2007-10-23 | Northrop Grumman Ship Systems, Inc. | Passive exhaust suppressor and method |
KR101377233B1 (en) | 2006-11-14 | 2014-03-20 | 테네코 오토모티브 오퍼레이팅 컴파니 인코포레이티드 | Device for lowering tail pipe exhaust temperature |
US7757482B2 (en) * | 2007-02-21 | 2010-07-20 | Gm Global Technology Operations, Inc. | Variable geometry exhaust cooler |
-
2009
- 2009-10-30 DE DE102009046253A patent/DE102009046253A1/en not_active Withdrawn
-
2010
- 2010-09-02 US US12/874,623 patent/US20110099990A1/en not_active Abandoned
- 2010-10-20 EP EP10188159.7A patent/EP2317093A3/en not_active Withdrawn
- 2010-10-28 BR BRPI1013480-8A patent/BRPI1013480A2/en not_active IP Right Cessation
- 2010-10-29 CN CN2010105313930A patent/CN102052134A/en active Pending
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US20080282688A1 (en) * | 2007-05-18 | 2008-11-20 | International Truck Intellectual Property Company, Llc | Engine gas temperature reduction |
US20090282818A1 (en) * | 2008-04-18 | 2009-11-19 | Martin Keller | Tail pipe exhaust cooling device |
US20100000205A1 (en) * | 2008-07-01 | 2010-01-07 | General Motors Global Technology Operations, Inc. | Apparatus and method for cooling an exhaust gas |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110258983A1 (en) * | 2010-04-23 | 2011-10-27 | Gm Global Technology Operations, Inc. | Reconfigurable mixer for an exhaust aftertreatment system and method of using the same |
US8935918B2 (en) * | 2010-04-23 | 2015-01-20 | GM Global Technology Operations LLC | Reconfigurable mixer for an exhaust aftertreatment system and method of using the same |
US20140151143A1 (en) * | 2011-07-19 | 2014-06-05 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Construction machine |
US9347202B2 (en) * | 2011-07-19 | 2016-05-24 | Kobelco Construction Machinery Co., Ltd. | Construction machine |
DE102011087675A1 (en) * | 2011-12-02 | 2013-06-06 | Deere & Company | Cooling system for active cooling of an exhaust system |
US20140360167A1 (en) * | 2013-06-05 | 2014-12-11 | Caterpillar Global Mining Expanded Products Pty Ltd | System and method for cooling of an aftertreatment module |
US20150033734A1 (en) * | 2013-07-30 | 2015-02-05 | GM Global Technology Operations LLC | Gas flow distributing flexible coupling |
US9140172B2 (en) * | 2013-07-30 | 2015-09-22 | GM Global Technology Operations LLC | Gas flow distributing flexible coupling |
US10358970B2 (en) | 2017-01-17 | 2019-07-23 | Ford Global Technologies, Llc | Cooling assembly for temperature control |
US20200224567A1 (en) * | 2017-10-03 | 2020-07-16 | Volvo Lastvagnar Ab | Process consisting in cooling at least one component, such as a sensor, arranged within a compartment of an exhaust after treatment system of a vehicle |
Also Published As
Publication number | Publication date |
---|---|
EP2317093A3 (en) | 2013-04-17 |
BRPI1013480A2 (en) | 2014-02-04 |
CN102052134A (en) | 2011-05-11 |
DE102009046253A1 (en) | 2011-05-05 |
EP2317093A2 (en) | 2011-05-04 |
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Legal Events
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