EP0775817B1 - Abgasrückführung an aufgeladenen Brennkraftmaschinen - Google Patents
Abgasrückführung an aufgeladenen Brennkraftmaschinen Download PDFInfo
- Publication number
- EP0775817B1 EP0775817B1 EP96116740A EP96116740A EP0775817B1 EP 0775817 B1 EP0775817 B1 EP 0775817B1 EP 96116740 A EP96116740 A EP 96116740A EP 96116740 A EP96116740 A EP 96116740A EP 0775817 B1 EP0775817 B1 EP 0775817B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust
- exhaust gas
- gas recirculation
- gas
- valve
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
-
- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
-
- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
- F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
-
- 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
- F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
- F02M26/43—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders in which exhaust from only one cylinder or only a group of cylinders is directed to the intake of the engine
-
- 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
- F02M26/52—Systems for actuating EGR valves
- F02M26/59—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor
- F02M26/61—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor in response to exhaust pressure
- F02M26/615—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor in response to exhaust pressure the exhaust back pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
-
- 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
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/21—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system with EGR valves located at or near the connection to the intake system
-
- 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
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
-
- 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
- F02M26/40—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with timing means in the recirculation passage, e.g. cyclically operating valves or regenerators; with arrangements involving pressure pulsations
-
- 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
- F02M26/65—Constructional details of EGR valves
- F02M26/72—Housings
- F02M26/73—Housings with means for heating or cooling the EGR valve
Definitions
- the invention relates to exhaust gas recirculation according to the preamble of Claim 1.
- Such a device is not able to set a higher exhaust pressure in front of the exhaust valve, which in all Operating states of the internal combustion engine would be able to, the charge air pressure in the To overcome charge air pipe. Via the line parallel to the exhaust manifold so much exhaust gas that even with the exhaust valve closed, the charge air pressure is not always is exceeded.
- an exhaust gas recirculation is known in which the exhaust gas recirculation line branches off from the exhaust pipes in front of the inlet of the exhaust gas turbine and via a Exhaust control valve opens into the charge air line.
- the control device consists of a Throttle valve which can be actuated by an actuator and which is located at the outlet of the exhaust gas turbine is arranged. Since such exhaust gas recirculation combines all exhaust pipes the back pressure caused by the throttle valve is one in all cylinders multi-cylinder internal combustion engine effective, which of course with a reduction the shaft power of the internal combustion engine is connected.
- the object of the invention is sufficient in supercharged internal combustion engines Exhaust gas recirculation on the high pressure side in the entire map of the internal combustion engine to enable, with minimal influence on the gas exchange work in areas where the charge air pressure would otherwise exceed the exhaust gas pressure.
- throttle and adjustable exhaust valve allows the Set the exhaust gas back pressure in front of the control device in all operating states that the exhaust gas flow to be set flows in the direction of the charge air system when exhaust gas recirculation it is asked for.
- Claim 3 provides a development of the control device for optimal exhaust gas recirculation with minimal extension work.
- Exhaust back pressure can be limited to the minimum number of cylinders, which is sufficient Exhaust gas recirculation rate ensures that the increase in gas exchange work through the higher back pressure remains limited to a small number of cylinders.
- Figure 1 shows a circuit diagram of a pressure-side exhaust gas recirculation of a supercharged Internal combustion engine.
- the example shows a six-cylinder internal combustion engine 1 with a turbocharger 2, consisting of turbine 3 and compressor 4.
- the charge air can be recooled by a charge air cooler 5 and fed to a charge air pipe 6 will.
- parts of the exhaust gas can be obtained by varying the Throttling effect of the control device 7 via an exhaust gas recirculation line 8 and an exhaust gas control valve 9 are returned to the charge air tube 6.
- An exhaust gas cooler 10 can be connected upstream or downstream of the exhaust gas control valve 9.
- the control device 7 consists of a line 12a with a throttle point 11 and an exhaust gas valve 12 connected in parallel thereto, which by a Actuator 13a is adjustable.
- a line 12a with a throttle point 11 and an exhaust gas valve 12 connected in parallel thereto which by a Actuator 13a is adjustable.
- the control device 7 with a Throttle point 11 and an exhaust gas control valve 12 and actuator connected in parallel therewith 13a is between the exhaust manifold 15 and exhaust gas bine 5 switched on.
- a flap valve 7a can be arranged in the exhaust gas recirculation line 8. In order to is also with fully opened exhaust valve 12 in areas of high exhaust pressure pulsation reached a certain exhaust gas recirculation.
- the control device 7 can be arranged downstream of the cylinder 14c (FIG. 2) and thus all 3 cylinders 14a, 14b, 14c of an exhaust gas flood for the generation of the Use exhaust back pressure and the exhaust gas flow to be recirculated.
- exhaust gas If exhaust gas is now to be recirculated in a specific engine map, it can the flow through the exhaust valve 12 by means of fine adjustment by means of actuator 13a Compared to the throttle point 11 so that in front of the control device 7 builds up a defined exhaust gas pressure, which the charge air pressure in the charge air pipe 6 exceeds.
- the amount of the exhaust gas recirculated via the exhaust gas line 8 can be determined by the position of the exhaust valve 12 can be adjusted.
- the throttle point 11 is too dimension that with exhaust valve 12 closed in the area of the engine map, where the positive purge gradient is greatest, there is a sufficient exhaust gas recirculation rate sets the exhaust valve in the other areas of the engine map 12 is opened so far that the necessary exhaust gas recirculation rate is in each case the smallest possible exhaust gas back pressure upstream of the control device 7 sets, and that when the exhaust valve 12 is fully open in the areas of the engine map, where there should be no media exchange between the exhaust and air systems, the Exhaust gas control valve 9 is closed.
- FIG. 4 An embodiment of the control device 7 is shown in Figures 4, 5. 4, the control device 7 is laterally together with the exhaust manifold 15 flanged to a cylinder head by means of screws 16a, 16b.
- the housing 17 merges the exhaust valve 12 and the throttle point 11 and forms with the sections 15a, 15b of the exhaust manifold 15 is a structural unit.
- the throttle point 11 connects the Sections 15a, 15b of the exhaust manifold 15, so that there is an overpressure in the exhaust space 19 can form, which through the exhaust valve connected in parallel to the throttle valve 11 12 can be regulated.
- the exhaust valve 12 is controlled by an actuator 13a (Fig. 1) regulated.
- a section V - V is shown in FIG. 5.
- the housing 17 is connected to the section 15a Cylinder head, for example 14a (Fig. 1) flanged.
- the exhaust gas space 19 is on the one hand via the throttle point 11 and on the other hand via the exhaust valve 12 with the section 15b of the exhaust manifold 15 (Fig. 4) connected.
- the exhaust gas to be recycled passes through the flue gas recirculation line 8 flanged to the housing 17 1 apparent air manifold 6th
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Supercharger (AREA)
Description
- Fig. 1
- ein Schaltschema einer Brennkraftmaschine mit Abgasturbolader und einer Regeleinrichtung zur druckseitigen Abgasrückführung.
- Fig. 2
- ein Schaltschema einer Brennkraftmaschine mit zweiflutiger Abgasturboaufladung, wobei die Regeleinrichtung stromabwärts von Zylinder 14a angeordnet ist.
- Fig. 3
- ein Schaltschema einer Brennkraftmaschine mit zweiflutiger Abgasturboaufladung, wobei die Regeleinrichtung stromabwärts der Zylinder 14a, 14b angeordnet ist.
- Fig. 4
- ein Beispiel einer konstruktiven Ausbildung der Einrichtung 7, die stromabwärts des Zylinders Nr. 6 angeordnet ist.
- Fig. 5
- einen Schnitt V-V durch die Einheit von Drossel und Abgasventil von Fig. 4.
Claims (4)
- Abgasrückführung an aufgeladenen Brennkraftmaschinen, bei der das Abgas eines, oder mehrerer Zylinder einem Abgassammelröhr (15) stromaufwärts einer Regeleinrichtung (7) entnommen und über eine Abgasrückführleitung (8), sowie einen Abgaskühler (10) und ein Abgasregelventil (9) in ein Ladeluftrohr (6) rückgeführt wird, wobei die Regeleinrichtung (7) aus einem mittels Stellglied (13a) regelbaren Abgasventil (12) gebildet wird, dadurch gekennzeichnet, daß die Regeleinrichtung (7) auch eine parallel zum Abgasventil (12) geschaltete Leitung (12a) aufweist, daß in die Leitung (12a) eine Drosselstelle (11) eingebaut ist, derart, daß die Drosselstelle (11) und das Abgasventil (12) in einem Gehäuse (17) zu einer baulichen Einheit zusammengefaßt sind, daß das Gehäuse (17) zwischen Rohrabschnitten (15a, 15b) in ein Abgassammelrohr (15) integriert ist, und daß ein Abgasraum (19), welcher zwischen den Abschnitten (15a, 15b) liegt, über eine Abgasrückführleitung ( 8) und ein Abgasregelventil (9) mit dem Ladeluftrohr (6) verbunden ist.
- Abgasrückführung nach Anspruch 1, dadurch gekennzeichnet, daß die Regeleinrichtung (7) bei mehrzylindrigen Brennkraftmaschinen zwischen zwei benachbarten Zylindern (14a, 14b) angeordnet ist, wobei der äußere Zylinder (14a) der Schwungradseite der Brennkraftmaschine zugeordnet ist.
- Abgasrückführung nach Anspruch 1, dadurch gekennzeichnet, daß bei n-zylindrigen Maschinen die Regeleinrichtung (7) einer kleineren Anzahl von Zylindern als n nachgeschaltet ist.
- Abgasrückführung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zwischen Abgassammelrohr (15) und Ladeluftrohr (6) in der Abgasrückführleitung (8) ein Flatterventil (7a) angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19543290A DE19543290C2 (de) | 1995-11-21 | 1995-11-21 | Abgasrückführung an aufgeladenen Brennkraftmaschinen |
DE19543290 | 1995-11-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0775817A1 EP0775817A1 (de) | 1997-05-28 |
EP0775817B1 true EP0775817B1 (de) | 1998-11-25 |
Family
ID=7777964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96116740A Expired - Lifetime EP0775817B1 (de) | 1995-11-21 | 1996-10-18 | Abgasrückführung an aufgeladenen Brennkraftmaschinen |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0775817B1 (de) |
DE (2) | DE19543290C2 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19744936A1 (de) * | 1997-10-10 | 1999-04-15 | Deutz Ag | Abgasrückführung bei einer aufgeladenen Brennkraftmaschine |
DE19836677C2 (de) | 1998-08-13 | 2001-04-19 | Daimler Chrysler Ag | Motorbremseinrichtung für eine Brennkraftmaschine mit einem Abgasturbolader |
US6089019A (en) * | 1999-01-15 | 2000-07-18 | Borgwarner Inc. | Turbocharger and EGR system |
DE19929449A1 (de) * | 1999-06-26 | 2000-12-28 | Man Nutzfahrzeuge Ag | Abgasrückführleitung für Brennkraftmaschinen |
AT413863B (de) * | 1999-08-04 | 2006-06-15 | Man Steyr Ag | Verfahren zur abgasrückführung an einer mittels abgasturbolader aufgeladenen mehrzylindrigen hubkolbenbrennkraftmaschine |
US20120325187A1 (en) * | 2011-06-21 | 2012-12-27 | Caterpillar Inc. | Egr flow control for large engines |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3498274A (en) * | 1968-04-29 | 1970-03-03 | Garrett Corp | Fuel injector for internal combustion engines |
US4249382A (en) * | 1978-05-22 | 1981-02-10 | Caterpillar Tractor Co. | Exhaust gas recirculation system for turbo charged engines |
US4413593A (en) * | 1980-06-27 | 1983-11-08 | Cornell Research Foundation, Inc. | Combustion control by prestratification |
DE3237337A1 (de) * | 1981-10-14 | 1983-04-28 | List, Hans, Prof. Dipl.-Ing. Dr.Dr.h.c., 8010 Graz | Brennkraftmaschine |
JPS58154830U (ja) * | 1982-04-09 | 1983-10-17 | マツダ株式会社 | 過給機付エンジンの排気還流装置 |
JPS60195955U (ja) * | 1984-06-06 | 1985-12-27 | トヨタ自動車株式会社 | タ−ボチヤ−ジヤ付エンジンのegr制御装置 |
DE3720942C2 (de) * | 1986-07-08 | 1995-03-16 | Volkswagen Ag | Regelsystem für eine aufgeladene Brennkraftmaschine |
DE4214880C2 (de) * | 1991-05-08 | 1996-03-07 | Nissan Motor | Regelvorrichtung einer Abgasrückführung |
AT403616B (de) * | 1991-09-02 | 1998-04-27 | Avl Verbrennungskraft Messtech | Brennkraftmaschine mit einem einlass- und einem auslasssystem, einem abgasturbolader sowie einem druckspeicher |
JPH0586989A (ja) * | 1991-09-26 | 1993-04-06 | Mazda Motor Corp | 機械式過給機付エンジンの排気ガス還流装置 |
JPH0586991A (ja) * | 1991-09-26 | 1993-04-06 | Mazda Motor Corp | 機械式過給機付エンジンの排気ガス還流装置 |
DE4235794C1 (de) * | 1992-10-23 | 1993-10-28 | Daimler Benz Ag | Abgasrückführung für eine Brennkraftmaschine |
DE9421145U1 (de) * | 1994-04-28 | 1995-05-04 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 88045 Friedrichshafen | Dieselbrennkraftmaschine mit in einer Abgasrückführleitung angeordnetem Wärmetauscher für die Abgaskühlung |
DE4429232C1 (de) * | 1994-08-18 | 1995-09-07 | Daimler Benz Ag | Vorrichtung zur Abgasrückführung für eine aufgeladene Brennkraftmaschine |
-
1995
- 1995-11-21 DE DE19543290A patent/DE19543290C2/de not_active Expired - Fee Related
-
1996
- 1996-10-18 EP EP96116740A patent/EP0775817B1/de not_active Expired - Lifetime
- 1996-10-18 DE DE59600861T patent/DE59600861D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0775817A1 (de) | 1997-05-28 |
DE59600861D1 (de) | 1999-01-07 |
DE19543290A1 (de) | 1997-05-22 |
DE19543290C2 (de) | 1998-07-02 |
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