EP2018472A1 - Ensemble de soupapes pour système de recyclage des gaz d'échappement - Google Patents

Ensemble de soupapes pour système de recyclage des gaz d'échappement

Info

Publication number
EP2018472A1
EP2018472A1 EP07728912A EP07728912A EP2018472A1 EP 2018472 A1 EP2018472 A1 EP 2018472A1 EP 07728912 A EP07728912 A EP 07728912A EP 07728912 A EP07728912 A EP 07728912A EP 2018472 A1 EP2018472 A1 EP 2018472A1
Authority
EP
European Patent Office
Prior art keywords
housing
inlet
outlet
valve
exhaust gas
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
Application number
EP07728912A
Other languages
German (de)
English (en)
Other versions
EP2018472B1 (fr
Inventor
Andreas GRÜNER
Robert Sendor
Rüdiger Knauß
Bernhard Schwalk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP2018472A1 publication Critical patent/EP2018472A1/fr
Application granted granted Critical
Publication of EP2018472B1 publication Critical patent/EP2018472B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • F02M26/26—Layout, e.g. schematics with coolers having bypasses characterised by details of the bypass valve
    • 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
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on 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
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/38—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in parallel
    • 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
    • F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
    • 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
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers
    • 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
    • F02M26/33—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 controlling the temperature of the recirculated gases

Definitions

  • the present invention relates to a valve arrangement for an exhaust gas recirculation device of an internal combustion engine, in particular in a motor vehicle.
  • the invention also relates to an exhaust gas recirculation device equipped with such a valve arrangement.
  • an exhaust gas recirculation is increasingly used, thereby improving the emission values and the economy of the internal combustion engine.
  • a modern exhaust gas recirculation (EGR) device typically has an EGR cooler installed in an exhaust gas recirculation line, EGR line for short, which is connected to a cooling circuit operating with a liquid coolant.
  • EGR exhaust gas recirculation
  • an EGR device which has a bypass bypassing the EGR external, which can be controlled by means of a corresponding switching valve.
  • bypass bypassing the EGR external, which can be controlled by means of a corresponding switching valve.
  • the bypass With the help of such a bypass the possibility is created to bypass the EGR cooler with activated bypass. This is desirable, for example, during a cold start of the internal combustion engine, in order thereby to be able to warm up the internal combustion engine as quickly as possible via the heat of the recirculated exhaust gases.
  • the bypass is deactivated, so that the recirculated exhaust gases then flow through the EGR cooler and are thereby cooled.
  • the present invention addresses the problem of providing an inexpensive way for an EGR device to adjust the amount and temperature of the recirculated exhaust gases as closely as possible. According to the invention, this problem is solved by the subject-matter of the independent claims. Advantageous embodiments are the subject of the dependent claims.
  • the invention is based on the general idea to provide for the EGR device, a valve assembly containing two separate gas paths and two valves for controlling these gas paths in a common housing, wherein the two valves each switchable between an open position, a closed position and at least one intermediate position are.
  • the two valves each switchable between an open position, a closed position and at least one intermediate position are.
  • the intermediate positions of the two valves allow volume regulation of the returned exhaust gases. Consequently, it is possible to adjust the amount of returned exhaust gases, which is also referred to as the exhaust gas recirculation rate or, for short, the EGR rate.
  • an additional valve for adjusting the EGR rate is dispensable.
  • the valve assembly can thereby build comparatively inexpensive.
  • the common housing can be designed such that it can be connected to a coolant circuit.
  • the cooling of the housing allows the arrangement of the valve assembly upstream or einlasssei- This is advantageous for the precise setting of the EGR rate and the cooling effect.
  • the cooled housing allows the use of plastic as a material for components of the valve assembly which are mounted to the housing. For example, can thus housing of actuators for actuating the valves made of plastic.
  • 1 shows a longitudinal section through a valve arrangement with attached thereto exhaust gas recirculation cooler
  • 2 is a longitudinal section as in Fig. 1, but in another sectional plane
  • valve assembly is a perspective view of the valve assembly
  • Fig. 4 is a view as in Fig. 3, but with the housing omitted.
  • an exhaust gas recirculation device 1 shown only partially, hereinafter referred to as EGR device 1 comprises a valve arrangement 2 and an exhaust recirculation cooler 3, hereinafter referred to as EGR cooler 3.
  • the valve arrangement 2 is directly connected to the EGR cooler 3, whereby the valve assembly 2 and the EGR cooler 3 form a completely pre-assembled assembly 4, which is easy to handle and facilitates the installation in an exhaust gas recirculation line 5, hereinafter referred to EGR line 5, which is indicated here only by broken lines.
  • the EGR device 1 is used in a conventional manner in an internal combustion engine, not shown, which can be arranged in particular in a motor vehicle, to recirculate exhaust gases of the internal combustion engine from an exhaust gas side to a fresh gas side of the internal combustion engine.
  • the EGR line 5 is connected on the one hand to the exhaust side and on the other hand to the fresh gas side of the internal combustion engine and contains the valve assembly 2 and the EGR cooler.
  • the valve arrangement 2 comprises a common housing 6, in which two more or less separate gas paths, namely a first gas path 7 and a second gas path 8 are formed, which are indicated here by arrows.
  • the valve arrangement 2 also comprises two valves, namely a first valve 9 and a second valve 10, which are each arranged in the housing 6.
  • the first valve 9 is assigned to the first gas path 7 and can thus control a gas flow through the first gas path 7.
  • the second valve 10 is associated with the second gas path 8 and can thus control a gas flow through the second gas path 8.
  • Both valves 9, 10 are each and independently adjustable between an open position, a closed position and at least one intermediate position.
  • the valve arrangement 2 comprises for each valve 9, 10 an actuator, namely a first actuator 11 for actuating the first valve 9 and a second actuator 12 for actuating the second valve 10.
  • the common housing 6 contains in addition to the two gas paths 7, 8 also has a coolant path 13, which is also indicated here by arrows.
  • the coolant path 13 can be connected to a cooling circuit 14, which is indicated here by arrows drawn with a broken line.
  • the housing 6 has an inlet connection 15 and an outlet connection 16, both of which are connected to the coolant path 13.
  • the inlet nozzle 15 is connected via a connecting piece 17 to a coolant outlet 18 of the EGR cooler 3.
  • a coolant inlet 19 of the EGR cooler 3 is connected to the cooling circuit 14, so that the coolant of the cooling circuit 14 enters the assembly 4 via the coolant inlet 19 of the EGR cooler 3 and back out of the assembly 4 via the outlet port 16 of the housing 6 exit.
  • a particularly compact design for the assembly 4 is achieved.
  • the housing 6 is preferably made of metal. Preferably, it can be made in one piece.
  • the housing 6 is a cast component.
  • the cooled housing 6 allows the use of plastic for components of the valve assembly 2 to be mounted on the housing 6. These are, for example, a first drive housing 20 of the first actuator 11 and a second drive housing 21 of the second actuator 12. Both drive housing 20, 21 can be inexpensively made of plastic and can still be attached to the housing 6, although this in the operation of the EGR Device 1 is traversed by hot exhaust gases.
  • the housing 6 has an inlet flange 22 with which the housing 6 can be inserted into the EGR device 1. In the installation case shown, the housing 6 is connected via the inlet flange 22 to the EGR line 5. According to FIGS.
  • the housing 6 also has an outlet flange 23 with which the housing 6 can be inserted into the EGR device 1.
  • the housing 6 is connected via the outlet flange 23 directly to the EGR cooler 3.
  • a fastener, here a clamp is designated 24.
  • the two gas paths 7, 8 now extend within the housing 6 from the inlet flange 22 to the outlet flange 23.
  • the housing 6 can be provided with an inlet line 25, which leads from the inlet flange 22 as far as unspecified inlet sides of the valves 9, 10.
  • the housing 6 also includes an inlet leg 26.
  • This inlet leg 26 is disposed in the inlet duct 25 to form therein two separate inlet channels, namely a first inlet channel 27 and a second inlet channel 28.
  • the inlet web 26 is dimensioned so that it extends into the inlet flange 22 and terminates flush therewith.
  • the first inlet passage 27 thus connects the inlet flange 22 with the inlet side of the first valve 9, while the second inlet passage 28 connects the inlet flange 22 with the inlet side of the second valve 10.
  • the inlet web 26 is preferably an integral part of the housing 6.
  • ration in which the valve arrangement 2 is arranged upstream of the EGR cooler 3 with regard to the exhaust gas flow, basically the inlet web 26 can be dispensed with.
  • the housing 6 has an outlet line 29 which leads from the outlet flange 23 to the outlet sides of the valves 9, 10, which are not designated in greater detail. Furthermore, an outlet web 30 is formed in the housing 6. This is arranged in the outlet line 29 so as to form therein two separate outlet channels, namely a first outlet channel 31 and a second outlet channel 32. Further, the outlet land 30 is dimensioned to project axially beyond the outlet flange 23.
  • the first outlet channel 31 connects the outlet side of the first valve 9 with the outlet flange 23.
  • the second outlet channel 32 connects the outlet side of the second valve 10 with the outlet flange 23.
  • the outlet web 30 is preferably an integral part of the housing 6.
  • the EGR cooler 3 includes a cooling space 33 through which liquid coolant can flow, which is connected to the coolant inlet 19 and to the coolant outlet 18 and which is delimited on an exhaust gas inlet side with an inlet wall 34 and on an exhaust gas outlet side with an outlet wall 35.
  • the cooling space 33 is penetrated by a plurality of cooling tubes 36, which penetrate on the one hand the inlet wall 34 and on the other hand the outlet wall 35.
  • the cooling tubes communicate at the exhaust gas inlet side with an inlet space 37 of the EGR cooler 3 and at the exhaust gas outlet side with an outlet. Lassraum 38.
  • the outlet web 30 of the housing 6 is suitably dimensioned so that it protrudes in the assembled state of the assembly 4 so far into the inlet space 37 that it extends to the inlet wall 34.
  • the outlet web 30 can touch the inlet wall 34 or even maintain a comparatively small gap therewith.
  • the outlet land 30 in the inlet space 37 separates two inlet part spaces from each other, namely a first inlet part space 39 communicating with the first outlet channel 31 and a second inlet part space 40 communicating with the second outlet channel 32.
  • the inlet part spaces 39, 40 communicate independently with each other via the cooling tubes 36 Outlet space 38.
  • the cooling pipes 36 assigned here to the first inlet part space 39 can be equipped with turbulizers and / or fins 41, which, when flowing through the respective cooling pipe 36, heat flow between the exhaust gas and the cooling pipe 36 on the one hand and thus the heat flow. mestrom between cooling tube 36 and coolant on the other hand increase.
  • valve assembly 2 is thus used to divide the recirculated exhaust gas flow into two cooling tube groups of different cooling within the EGR cooler 3.
  • valve assembly 2 may also be used to divide the recirculated exhaust gas flow between an EGR cooler and an internal or external bypass bypassing the EGR cooler.
  • valve assembly 2 is disposed upstream of the EGR cooler 3 with respect to the exhaust gas flow. In another embodiment, it is basically possible to arrange the valve assembly 2 with respect to the exhaust gas flow downstream of the EGR cooler. A cooling of the housing 6 can then be dispensed with.
  • each valve 9, 10 may, in particular with regard to FIG. 4, be constructed in the manner of a poppet valve.
  • each valve 9, 10 comprises a valve disk 42, which is arranged to be adjustable in the stroke to a valve seat 44 via a valve stem 43.
  • the valve seat 44 is formed on a valve sleeve 45, which is also part of the respective valve 9, 10.
  • the valve seat 44 together with the valve disk 42 cooperating therewith, forms the inlet side of the respective valve 9, 10.
  • the outlet side of the respective valve 9, 10 is formed by a window 46, which is located in the Valve sleeve 45 of the respective valve 9, 10 is recessed.
  • the valves 9, 10 thus each comprise all the components required for the functioning of the respective valve 9, 10.
  • the valves 9, 10 are designed so that they can be used in the fully assembled state in the housing 6.
  • the housing 6 according to FIG. 3, a mounting side 47, through which the valves 9, 10 are inserted into the housing 6.
  • This mounting side 47 is equipped with a mounting flange 48 and is closed in the assembled state with a flange 49.
  • the flange plate 49 is preferably shaped to be complementary to the mounting flange 48.
  • a seal 50 is arranged to seal the mounting side 47 tightly.
  • the term "axial" in this context refers to the mounting direction, that is, the plug-in direction, with which the valves 9, 10 are inserted into the housing 6.
  • valves 9, 10 are designed such that they permit not only the two end positions, open position and closed position, but also at least one, preferably any intermediate positions, an exhaust gas recirculation rate, EGR for short, can be achieved with the aid of the valves 9, 10 Set rate, both by the first gas path 7 and by the second gas path 6 independently.
  • valve assembly 2 allows on the one hand the setting of the EGR rate and on the other hand the adjustment of the distribution of recirculated exhaust gases to the two gas paths 7, 8.
  • the distribution of the recirculated exhaust gases on the two gas paths 7, 8 ultimately determines the cooling of the recirculated exhaust gases, so that with the aid of the valve assembly 2 in addition to the EGR rate also the exhaust gas cooling is adjustable.

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)

Abstract

La présente invention concerne un ensemble de soupapes (2) destiné à un système de recyclage des gaz d'échappement d'un moteur à combustion interne, en particulier dans un véhicule à moteur. Cet ensemble de soupapes (2) comprend une première soupape (9) servant à commander une première voie de gaz (7), cette première soupape (9) pouvant être déplacée entre une position ouverte, une position fermée et au moins une position intermédiaire. L'ensemble de soupapes (2) selon l'invention comprend par ailleurs une seconde soupape (10) servant à commander une seconde voie de gaz (8) séparée de la première voie de gaz (7), cette seconde soupape (10) pouvant être déplacée entre une position ouverte, une position fermée et au moins une position intermédiaire indépendamment de la première soupape (9). L'ensemble de soupapes (2) comprend en outre un corps commun (6) dans lequel sont disposées les deux soupapes (9, 10) et à travers lequel passent les deux voies de gaz (7, 8).
EP07728912A 2006-05-19 2007-05-09 Ensemble de soupapes pour système de recyclage des gaz d'échappement Expired - Fee Related EP2018472B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006023852A DE102006023852A1 (de) 2006-05-19 2006-05-19 Ventilanordnung für eine Abgasrückführeinrichtung
PCT/EP2007/054460 WO2007134962A1 (fr) 2006-05-19 2007-05-09 Ensemble de soupapes pour système de recyclage des gaz d'échappement

Publications (2)

Publication Number Publication Date
EP2018472A1 true EP2018472A1 (fr) 2009-01-28
EP2018472B1 EP2018472B1 (fr) 2010-08-18

Family

ID=38191792

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07728912A Expired - Fee Related EP2018472B1 (fr) 2006-05-19 2007-05-09 Ensemble de soupapes pour système de recyclage des gaz d'échappement

Country Status (6)

Country Link
US (1) US8225773B2 (fr)
EP (1) EP2018472B1 (fr)
CN (1) CN101495743A (fr)
BR (1) BRPI0712024A2 (fr)
DE (2) DE102006023852A1 (fr)
WO (1) WO2007134962A1 (fr)

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Also Published As

Publication number Publication date
DE102006023852A1 (de) 2007-11-22
DE502007004793D1 (de) 2010-09-30
EP2018472B1 (fr) 2010-08-18
CN101495743A (zh) 2009-07-29
US20100108041A1 (en) 2010-05-06
BRPI0712024A2 (pt) 2011-12-27
US8225773B2 (en) 2012-07-24
WO2007134962A1 (fr) 2007-11-29

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