EP2057361A1 - Abgasstrang für eine brennkraftmaschine - Google Patents
Abgasstrang für eine brennkraftmaschineInfo
- Publication number
- EP2057361A1 EP2057361A1 EP07785957A EP07785957A EP2057361A1 EP 2057361 A1 EP2057361 A1 EP 2057361A1 EP 07785957 A EP07785957 A EP 07785957A EP 07785957 A EP07785957 A EP 07785957A EP 2057361 A1 EP2057361 A1 EP 2057361A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- line
- valves
- exhaust
- internal combustion
- bypass line
- 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.)
- Granted
Links
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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents using means for controlling, e.g. purging, the absorbents or adsorbents
- F01N3/0878—Bypassing absorbents or adsorbents
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
- F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
-
- 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
- F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
- F01N2410/02—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device in case of high temperature, e.g. overheating of catalytic reactor
-
- 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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/06—By-pass systems
- F01N2550/10—By-pass systems of catalytic converters
Definitions
- the invention relates to an exhaust system for an internal combustion engine according to the preamble of claim 1.
- a generic exhaust system is known for example from DE 3446247 Al.
- the exhaust gas treatment device is a catalyst that is irreversibly damaged by leaded gasoline. If unleaded gasoline is not available, the catalyst is protected from damage by shutting off the catalyst-carrying line by means of the valves and flowing the exhaust gas through the bypass line.
- the invention has the object of developing an exhaust system of the type described in the preamble of claim 1 such that at least the leading through the exhaust aftertreatment device line or the bypass line can be completely separated from the rest of the exhaust line.
- exhaust pipes per three cylinders of a six-cylinder internal combustion engine 10 are combined to form two exhaust gas manifolds 12 and 14 which each lead through a three-way catalytic converter 16 and 18.
- the exhaust gas collecting pipes 12 and 14 discharge downstream of the catalysts 16 and 18 into a common collecting pipe 20, from which a line leading through a nitrogen oxide storage catalyst 22 and a bypass line 26 bypassing the nitrogen oxide storage catalyst 22 branches off.
- the lines 24 and 26 flow downstream of the storage catalytic converter 22 into a common line 28, which leads through mufflers 30 and 32 into the environment.
- a three-way valve 34 is arranged, via which the manifold 20 is selectively connectable to the line 24 or the bypass line 26.
- a three-way valve 36 is arranged, by means of which either the line 24 to the line 28 or the bypass line 26 to the line 28 is connectable.
- a linear lambda probe 40 is arranged in each case.
- a lambda-jump probe 42 is arranged downstream of the catalytic converter 16.
- Flow upstream of the nitrogen oxide storage catalyst 22 is a temperature sensor 44 for measuring the temperature of the nitrogen oxide storage catalyst 22 fed exhaust gases. Downstream of the nitrogen oxide storage catalyst 22, a nitrogen oxide sensor 46 is arranged downstream of the nitrogen oxide storage catalyst 22.
- a return line 50 which is connected via a vacuum source 52 to the inlet of the internal combustion engine 10.
- a dashed shut-off valve 54 may be arranged in the return line.
- the negative pressure source 52 may be a negative pressure pump in a diesel engine or a venturi arrangement in which negative pressure is generated by means of the inlet flow into the engine, which allows exhaust gas to be sucked out of the return line 50 and the fresh air flowing into the internal combustion engine 10 to be mixed.
- the exhaust gas from the return line 50 can also be fed directly to the ambient air without being returned to the intake tract of the internal combustion engine or introduced again into the exhaust gas system at another point.
- the negative pressure source 52 may simply consist of the return line 50 discharging into the intake channel downstream of a throttle valve arranged in the inlet of the internal combustion engine.
- the vacuum source 52 may be a Venturi arrangement in which, with the aid of the flow in the conduit 24, preferably upstream of the nitrogen oxide storage catalyst 22, negative pressure is generated, which allows Exhaust gas is sucked out of the return line 50.
- a pressure purge of the space between the valves 34, 36 can be achieved by turbocharger pressure by starting at a turbocharger from a point with respect to the space between the valves 34, 36 increased pressure for pressure purging pressure-conducting connection to the space between the valves 34 ; 36 can be produced.
- For flushing the space between the valves 34. 36 may also be used ambient air.
- the output signals of the sensors are supplied to inputs 56 of an electronic control device 58, which is optionally connected to further control devices via a bus system, so that depending on the output signals of the sensors and optionally further operating parameters of the internal combustion engine via outputs 60, the valves 34, 36 and, if available , another valve 54 and other components, such as the fuel supply of the internal combustion engine, can be controlled. It is expedient if in particular the valves 34, 36 are not only open or closed controllable, but also selectively intermediate positions can be controlled, so that, if appropriate, a predetermined amount of leakage can be adjusted. If the valves 34, 36 are designed as flaps effective in the exhaust gas flow, such a control can be realized by a corresponding contact pressure, wherein an edge seal of the flap is pressed more or less strongly against the exhaust gas duct wall.
- a typical application of the described arrangement is that the storage catalyst 22 is protected by impermissibly high, measured by the temperature sensor 40 temperatures in which at least a portion of the exhaust gas flow is directed by appropriate actuation of the valve 34 in the bypass line 26, from which it Exhaust gas recirculation is diverted and the internal combustion engine is supplied.
- the valve 36 is in a position in which it separates the bypass line 26 from the line 28 and the line 24 connects to the line 28. If exhaust gas recirculation is not desired, the valve 54 may be closed and, if permitted, the valve 36 placed in a position to connect both lines 24 and 28 to the line 28.
- valves 34 and 36 are brought into a position in which they complete the mouths of the bypass line 26 as completely as possible and sealing. Any leaks in the valves 34 and 36 are harmless in that any stickoxid Vietnameses exhaust gas passing into the bypass line 26 is sucked through the return line 50 and the internal combustion engine is supplied again so that it does not enter the environment and adversely affects the effectiveness of the nitrogen oxide storage catalyst 22.
- the described arrangement can be modified in many ways. For example, for certain applications, one or both of the three-way valves 34 and 36 may be replaced by simple shut-off valves arranged one behind the other in the bypass lead 26 or conduit 24 at a greater or lesser distance.
- the valve 34 may be a four-way valve when the two Abgassammeirohre 12 and 14 are not combined to the manifold 20, but open directly into the valve 34. In this case, the valve 34 connects the two Abgassammeubehre 12 and 14 with the line 24 to then more or less free the inflow to Bypassleirung 26.
- the valves 34 and 36 may also be designed such that either the line 24 or the bypass lead 26 are fully separable from the manifold 20 and the headers 12 and 14 and the line 28 or more or less releasable.
- the valves 34 and 36 may be formed as a simple flap valves that can be moved by means of, for example, Shaschaltaktors in any position.
- the arrangement can be extended and made even safer in terms of potential leaks that such locations, such as bearings of the valves or other openings, which are loaded with untreated or not fully treated exhaust gas and allow its escape, are also connected to a vacuum-pressurized return line.
- the return line 50 can be used by appropriate control of at least one of the valves 34 or 36 for a controlled exhaust gas recirculation.
- a further sensor 62 is then advantageously arranged, the output of which is connected to one of the inputs 56 of the controller 58 and measures, for example, the pressure in the return line 50 or any other size, from which the amount of the in the internal combustion engine 10th recirculated exhaust gas can be calculated.
- the sensor 62 may be formed as a flow sensor.
- the valves 34 and 36 are controlled by the control unit 58 such that a predetermined exhaust gas recirculation rate is achieved, which is stored in the control unit 58 depending on the respective operating conditions of the internal combustion engine 10.
- valves 34 and 36 can be different types. For example, if the flow resistance of the nitrogen oxide storage catalyst 22 is high enough, For example, the valve 36 may disconnect the conduit 26 from the conduit 28 and the exhaust gas recirculation quantity may be adjusted only with the valve 34. If, on the other hand, the flow resistance of the nitrogen oxide storage catalytic converter 22 is very low, the valve 34 can be set, for example, such that the manifold 20 is connected to the conduit 24 and the conduit 26, and the pressure in the conduit 26 is adjusted by position of the valve 36 is determined.
- the exhaust aftertreatment device may be of any other type, such as a selective catalytic reduction (SCR) device, a 3-way catalyst, etc., in place of the nitrogen oxide storage catalyst, where different treatment systems may be combined.
- SCR selective catalytic reduction
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Analytical Chemistry (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006040876A DE102006040876A1 (de) | 2006-08-31 | 2006-08-31 | Abgasstrang für eine Brennkraftmaschine |
| PCT/EP2007/006089 WO2008025406A1 (de) | 2006-08-31 | 2007-07-10 | Abgasstrang für eine brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2057361A1 true EP2057361A1 (de) | 2009-05-13 |
| EP2057361B1 EP2057361B1 (de) | 2010-06-16 |
Family
ID=38543754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07785957A Ceased EP2057361B1 (de) | 2006-08-31 | 2007-07-10 | Abgasstrang für eine brennkraftmaschine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2057361B1 (de) |
| DE (2) | DE102006040876A1 (de) |
| WO (1) | WO2008025406A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008035553B4 (de) | 2008-07-30 | 2017-06-08 | Bayerische Motoren Werke Aktiengesellschaft | Brennkraftmaschine mit einer Abgasrückführeinrichtung |
| DE102008036896A1 (de) | 2008-08-07 | 2010-02-11 | Bayerische Motoren Werke Aktiengesellschaft | Abgasrückführungssystem für eine Verbrennungskraftmaschine |
| DE102009037285A1 (de) * | 2009-08-12 | 2011-02-17 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Abgasanlage einer Brennkraftmaschine |
| AT513133B1 (de) * | 2013-04-18 | 2014-02-15 | Avl List Gmbh | Großdiesel-Brennkraftmaschine |
| WO2017192245A1 (en) * | 2016-05-04 | 2017-11-09 | Tula Technology Inc. | Decel fuel cut-off |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3446247A1 (de) * | 1984-12-19 | 1986-06-05 | Anton 4440 Rheine Fransbach | Zweiwegeauspuffanlage fuer kraftfahrzeuge |
| JPS6424118A (en) * | 1987-07-15 | 1989-01-26 | Yanmar Diesel Engine Co | Internal-combustion engine with exhaust turbo charger |
| JPH06101461A (ja) * | 1992-09-18 | 1994-04-12 | Nissan Motor Co Ltd | 内燃機関の排気浄化装置 |
| DE4319294C1 (de) * | 1993-06-10 | 1994-05-19 | Daimler Benz Ag | Verfahren zur Reduzierung von Stickoxiden im Abgas einer Brennkraftmaschine |
| JP3248806B2 (ja) * | 1994-03-18 | 2002-01-21 | 本田技研工業株式会社 | 内燃エンジンの排気ガス浄化装置 |
| FR2770582B1 (fr) * | 1997-10-31 | 2000-01-28 | Valeo Thermique Moteur Sa | Ligne d'echappement et de recirculation des gaz pour moteur de vehicule automobile |
| DE102005017863A1 (de) * | 2005-04-19 | 2006-11-02 | Dr.Ing.H.C. F. Porsche Ag | Abgasabführungssystem für eine Brennkraftmaschine sowie Absperrklappe für ein Abgasabführungssystem |
-
2006
- 2006-08-31 DE DE102006040876A patent/DE102006040876A1/de not_active Withdrawn
-
2007
- 2007-07-10 WO PCT/EP2007/006089 patent/WO2008025406A1/de not_active Ceased
- 2007-07-10 DE DE502007004152T patent/DE502007004152D1/de active Active
- 2007-07-10 EP EP07785957A patent/EP2057361B1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008025406A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2057361B1 (de) | 2010-06-16 |
| DE502007004152D1 (de) | 2010-07-29 |
| WO2008025406A1 (de) | 2008-03-06 |
| DE102006040876A1 (de) | 2008-03-06 |
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