EP0717185A1 - Soupape de recirculation de gaz d'échappement - Google Patents

Soupape de recirculation de gaz d'échappement Download PDF

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Publication number
EP0717185A1
EP0717185A1 EP95115121A EP95115121A EP0717185A1 EP 0717185 A1 EP0717185 A1 EP 0717185A1 EP 95115121 A EP95115121 A EP 95115121A EP 95115121 A EP95115121 A EP 95115121A EP 0717185 A1 EP0717185 A1 EP 0717185A1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
gas recirculation
opening
tube
recirculation 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.)
Granted
Application number
EP95115121A
Other languages
German (de)
English (en)
Other versions
EP0717185B1 (fr
Inventor
Gerhard Dipl.-Ing. Schellenberg (Fh)
Johannes Dr.-Ing. Meiwes
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0717185A1 publication Critical patent/EP0717185A1/fr
Application granted granted Critical
Publication of EP0717185B1 publication Critical patent/EP0717185B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • F02M26/58—Constructional details of the actuator; Mounting thereof
    • 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
    • F02M26/18—Thermal insulation or heat protection
    • 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
    • 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
    • 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
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/68—Closing members; Valve seats; Flow passages
    • 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
    • F02M26/48—EGR valve position sensors
    • 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

Definitions

  • the invention is based on an exhaust gas recirculation valve according to claim 1.
  • a pipeline part is provided which is designed as an intermediate piece for use in an air line.
  • the pipe part has on one side an opening in the pipe wall through which a connecting piece connected to the exhaust gas recirculation line can be inserted into the interior of the pipe.
  • This nozzle has a flange, via which it is tightly connected to a flange surrounding the opening.
  • a guide socket is formed in the wall of the tube for the tight guidance of a shaft, at the end of which a valve disk is attached, which cooperates with the opening of the socket.
  • the shaft is connected to a pneumatic actuator.
  • this exhaust valve has to be fitted into the air line of the internal combustion engine in a complex manner and, on the other hand, it has to be assembled with complex assembly work.
  • Such exhaust gas recirculation valves are used for metering exhaust gas recirculation quantities that are controlled by opening or closing the exhaust gas valve via the actuator. For exact Dosing the exhaust gas recirculation quantities it is also necessary to measure the recirculated exhaust gas quantities. Only then can the exhaust gas recirculation quantities be precisely controlled. Such a measurement ultimately also provides information about the functionality of the exhaust gas recirculation valve. Such a device is not provided in the known exhaust gas recirculation valve.
  • the exhaust gas recirculation valve according to the invention has the advantage that a measurement of exhaust gas recirculation quantities is possible and that, in addition, a point immediately adjacent to the actual inflow point of recirculated exhaust gas is used to record the exhaust gas recirculation quantities.
  • the exhaust gas recirculation quantity is introduced directly into the fresh air stream via the nozzle, there is the advantage that the measuring point is cooled in a very effective manner by the air stream without additional measures having to be taken. This improves the security of the measurement.
  • the valve member can be used together with its actuator through an opening provided in the tube, and at the same time a connection can be made to the measuring point on the connecting piece.
  • the actuator and valve member can be preassembled in a simplified manner and can easily be inserted into the tube, which can be part of the intake system of the internal combustion engine, for example.
  • the tube can also be a further part of the exhaust gas recirculation line, the same advantageous mounting options being obtained.
  • the actuator, the valve member and the connecting piece are combined to form a structural unit, so that this unit can easily be seen from one side the pipe can be used in pre-assembled form. This is also particularly advantageous according to claim 12 when the exhaust gas recirculation valve is not provided with a measuring point on the nozzle.
  • the development according to claim 3 has the advantage that the recording of the measured variables and their evaluation can take place at separate points.
  • the evaluation device is assigned to the actuator outside the tube. This avoids long line connections and has the advantage of forming a compact arrangement.
  • a cross-sectional constriction is provided on the exhaust pipe as a device for recording the measured values for the exhaust gas recirculation quantities, and the pressures upstream and downstream of the cross-sectional constriction are evaluated.
  • This can be done either by pressure sensors arranged locally on the nozzle or by the fact that, according to claim 5, control openings are provided upstream and downstream of the cross-sectional constriction, which transmit the pressure prevailing there via pipes to the evaluation device on the actuator.
  • These pipes can be integrated in a particularly advantageous manner according to claim 7 in the connecting part connecting the actuator to the connecting piece. The result is a particularly compact unit that can be easily installed in an existing pipe on the internal combustion engine.
  • this compact unit can also be installed in the air intake system of the internal combustion engine according to claim 17, the exhaust gas recirculating connection piece being optimally cooled together with any pressure sensors provided directly on the connection piece. Furthermore, the actuator is no longer exposed to the hot exhaust gas in this case, but is also cooled by the flowing air in the air intake pipe in such a way that that the actuator can be built from molded plastic parts, which is particularly economical.
  • FIG. 1 shows a first longitudinal section through the pipe together with the exhaust gas recirculation valve and
  • FIG. 2 shows a section perpendicular to the representation according to FIG. 1.
  • a tube 1 which can be part of an air intake system of an internal combustion engine or can also be part of an exhaust gas recirculation line in an embodiment with a smaller diameter.
  • This pipe has in its peripheral wall a first pipe socket 2, which forms a first opening 3 in the wall of the pipe 1 and diametrically opposite the first pipe socket 2, a second pipe socket 4, which forms a second opening 5 in the wall of the pipe 1.
  • the diameter of the first opening 3 is larger than the diameter of the second opening 5.
  • the second pipe socket 4 is retracted at its outermost outer end to form an annular shoulder 7 pointing into the interior of the pipe 1 a closing part 9 made of sheet metal with a flange-shaped, radially outward-pointing shape 10 for contact.
  • the closing part is formed approximately in the shape of a truncated cone in the course of the tube and firmly connected at its end opposite the formation 10 with a plate 11, z. B. soldered to the inside of the locking part 9, the end of a connecting piece 12 is additionally fastened. This can also be soldered to the plate and encloses one Through hole 13 of the plate, which forms a diameter-equal passage to the diameter of a return line 14 flanged to the plate 11.
  • the connector 12 projects diametrically and coaxially to the first opening 3 and second opening 5 into the tube 1 and has at its inner end on the end face a valve seat 16 on which a valve disk 17 of a valve member 18 of the exhaust gas recirculation valve according to the invention comes to rest.
  • the valve plate sits at the end of a valve stem 19, which is guided at the other end in a housing 21 of an actuator 22. This is inserted with its housing 22 in the first pipe socket 2 with a tight seal of the opening 3.
  • the actuator consists of a pneumatically working pressure cell with an actuating membrane 23 clamped between the housing halves, to which the end 25 of the valve stem is connected by suitable means 24.
  • These means comprise a dimensionally stable spring plate 26 which has a blind hole 27 for fixing the shaped neck of the actuating membrane 23, into which the valve stem is pressed with a fir tree profile.
  • the corresponding control pressure is supplied to the working space 29 via a pressure line 30.
  • FIG. 2 shows in another section that the connector 12 together with the closing part 9 and plate 11 is connected to the housing 21 of the actuator 22 via a connecting part 32.
  • This connecting part consists of a part 33 which surrounds the connector 12 and into which a first pipeline 34 and a second pipeline 35 are enclosed. These pipes are offset to the socket 12, axially parallel to this, to the first opening 3 and open there into a connecting piece 36, which in turn is connected to the housing 21 or via this to the pipe socket.
  • Pressure chambers 37 and 38 are enclosed between this and the housing 21, which have a connection to an evaluation device, not shown, of the pressure difference between the pressures entering the pressure chamber 37 via the first pipeline 34 and the pressures entering the pressure chamber 38 via the second pipeline 35.
  • the first and the second pipeline 34, 35 are firmly connected to the connecting part 32 and the housing 21, so that they form a part to be handled together with the connecting piece 12, the closing part 9 and the plate 11 such that this part by the first opening 3 can be inserted into the tube 1 and can be partially guided out of it again through the second opening 5 until the closing part 9 comes into contact with the annular shoulder 7 via the seal 8.
  • the housing 21 of the actuator 22 has also sealed the first opening 3. In this way, the exhaust gas recirculation valve can be inserted into the pipe 1 in a very simple manner, which considerably simplifies assembly and also lowers the costs for implementing the exhaust gas recirculation valve.
  • the connecting piece 36 and the housing 21 of the actuator 22 are made in two parts and are used one after the other in the opening 3 of the first pipe socket. Appropriate seals between these two parts are required.
  • the connecting piece 36 then has an axial opening 39 which is so large that the valve plate 17 can be passed through.
  • the tube 1 is in turn sealed tightly to the outside.
  • the passage of the valve stem to the actuating diaphragm need not be completely tight, since between the actuating diaphragm 23 and There is a reference pressure chamber connected to the environment on the valve stem side housing part.
  • an exhaust gas recirculation valve designed in this way it is possible to measure the amount of exhaust gas recirculation that is supplied by a diameter constriction 43 being provided between the opening 40 of the first pipeline 34 into the interior of the connector 12 and the opening 41 of the second pipeline 35 into the interior of the adapter, through which between a differential pressure is formed upstream and downstream of the same nozzle area, which is dependent in a known manner on the amount flowing through, in this case the exhaust gas recirculation amount flowing through.
  • the pressures that arise are detected by the evaluation device described above.
  • the connecting part in particular in the embodiment of the type shown in FIG. 2, is preferably constructed from embossed sheet metal parts.
  • the closing part 9 and the socket 12 are preferably stamped from sheet metal.
  • the housing 21 of the actuator 22 can be made of plastic parts, since the heat supplied via the exhaust gas recirculation is rapidly produced by the intensive cooling by the supplied air flow is transported away.
  • the connecting part 32 in particular in the event that electronic pressure transducers are provided on the connecting piece, is also optimally cooled by the air flowing past, so that the best conditions for recording measured values are possible with low demands on the transmitter.
  • the funnel-shaped configuration of the closing part 9, which enables an even longer washing length for the nozzle 12, is advantageous here.

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 Circulating Devices (AREA)
  • Fluid-Driven Valves (AREA)
  • Sampling And Sample Adjustment (AREA)
EP95115121A 1994-11-18 1995-09-26 Soupape de recirculation de gaz d'échappement Expired - Lifetime EP0717185B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4441091 1994-11-18
DE4441091A DE4441091A1 (de) 1994-11-18 1994-11-18 Abgasrückführventil

Publications (2)

Publication Number Publication Date
EP0717185A1 true EP0717185A1 (fr) 1996-06-19
EP0717185B1 EP0717185B1 (fr) 1998-03-25

Family

ID=6533570

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95115121A Expired - Lifetime EP0717185B1 (fr) 1994-11-18 1995-09-26 Soupape de recirculation de gaz d'échappement

Country Status (4)

Country Link
US (1) US5609143A (fr)
EP (1) EP0717185B1 (fr)
JP (1) JPH08210197A (fr)
DE (2) DE4441091A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19549107A1 (de) * 1995-12-29 1997-07-03 Bosch Gmbh Robert Vorrichtung zur Abgasrückführung mit einem im Ansaugkanal betätigbaren Schließelement
US5669364A (en) * 1996-11-21 1997-09-23 Siemens Electric Limited Exhaust gas recirculation valve installation for a molded intake manifold
US7871325B2 (en) * 1997-02-07 2011-01-18 Okuniewicz Douglas M Means for generating a supplement bonus for an electronic gaming device
DE19725668C1 (de) * 1997-06-18 1998-10-29 Daimler Benz Ag Abgasrückführeinrichtung
US5996559A (en) * 1997-07-08 1999-12-07 Siemens Canada Limited Integrated manifold and purge valve
US6223733B1 (en) 1997-07-08 2001-05-01 Siemens Canada Limited Exhaust gas recirculation valve
US6152115A (en) * 1997-07-08 2000-11-28 Siemens Canada Limited Integrated engine intake manifold having a fuel vapor purge valve and an exhaust gas recirculation valve
US6073617A (en) * 1997-07-08 2000-06-13 Siemens Canada Ltd. Manifold-mounted emission control valve
US6237547B1 (en) 1998-09-10 2001-05-29 Yamaha Hatsudoki Kabushiki Kaisha Engine cooling arrangement
US6247461B1 (en) * 1999-04-23 2001-06-19 Delphi Technologies, Inc. High flow gas force balanced EGR valve
US6484705B2 (en) * 2001-02-21 2002-11-26 Delphi Technologies, Inc. Pintle valve having an internal flow modifier with self-aligning head
US6655657B2 (en) * 2001-06-06 2003-12-02 Delphi Technologies, Inc. Coking-resistant bearing
FR3104213B1 (fr) * 2019-12-05 2022-01-07 Faurecia Systemes Dechappement Dispositif de refroidissement d’un organe de mesure de débit pour une ligne de recirculation de gaz d’échappement

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4148286A (en) * 1976-10-01 1979-04-10 Nippon Soken, Inc. Exhaust gas recirculation system for an internal combustion engine
US4177777A (en) * 1976-08-23 1979-12-11 Nissan Motor Company, Limited Exhaust gas recirculation control system
EP0083852A1 (fr) * 1982-01-13 1983-07-20 General Motors Corporation Dispositif de contrôle de la récirculation de gaz d'échappement
US5203313A (en) * 1992-06-19 1993-04-20 Bundy Corporation EGR venturi coupler
US5241940A (en) * 1993-01-07 1993-09-07 Ford Motor Company Automotive EGR system
DE4301655C1 (de) * 1993-01-22 1994-02-17 Schelklingen Metallwarenfab Ventilanordnung für eine Abgasrückführung bei einem Verbrennungsmotor
DE4227739A1 (de) * 1992-08-21 1994-02-24 Bayerische Motoren Werke Ag Zumischventil, insbesondere Abgasrückführ-Ventil einer Brennkraftmaschine
DE4325169C1 (de) * 1993-07-27 1994-09-22 Bayerische Motoren Werke Ag Zumischventil, insbesondere Abgasrückführ-Ventil einer Brennkraftmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5824624B2 (ja) * 1977-09-09 1983-05-23 トヨタ自動車株式会社 排気ガス再循環装置
DE2940061A1 (de) * 1979-10-03 1981-04-16 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur steuerung der zusammensetzung des betriebsgemisches bei brennkraftmaschinen
US4566423A (en) * 1983-12-20 1986-01-28 Eaton Corporation Electronic feedback EGR valve
DE3428380A1 (de) * 1984-08-01 1986-03-06 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zur steuerung rueckgefuehrter abgasmengen bei brennkraftmaschinen
DE3444877A1 (de) * 1984-08-14 1986-04-17 Robert Bosch Gmbh, 7000 Stuttgart Steuereinrichtung fuer eine brennkraftmaschine und verfahren zur steuerung von den brennraeumen einer selbstzuendenden brennkraftmaschine zugefuehrten gasen bestehend aus luft und abgasrueckfuehrmengen
US4942860A (en) * 1987-02-06 1990-07-24 Toyota Jidosha Kabushiki Kaisha Engine control system
US5163295A (en) * 1991-09-09 1992-11-17 Eaton Corporation Controlling exhaust gas recirculation in a pressure boosted internal combustion engine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4177777A (en) * 1976-08-23 1979-12-11 Nissan Motor Company, Limited Exhaust gas recirculation control system
US4148286A (en) * 1976-10-01 1979-04-10 Nippon Soken, Inc. Exhaust gas recirculation system for an internal combustion engine
EP0083852A1 (fr) * 1982-01-13 1983-07-20 General Motors Corporation Dispositif de contrôle de la récirculation de gaz d'échappement
US5203313A (en) * 1992-06-19 1993-04-20 Bundy Corporation EGR venturi coupler
DE4227739A1 (de) * 1992-08-21 1994-02-24 Bayerische Motoren Werke Ag Zumischventil, insbesondere Abgasrückführ-Ventil einer Brennkraftmaschine
US5241940A (en) * 1993-01-07 1993-09-07 Ford Motor Company Automotive EGR system
DE4301655C1 (de) * 1993-01-22 1994-02-17 Schelklingen Metallwarenfab Ventilanordnung für eine Abgasrückführung bei einem Verbrennungsmotor
DE4325169C1 (de) * 1993-07-27 1994-09-22 Bayerische Motoren Werke Ag Zumischventil, insbesondere Abgasrückführ-Ventil einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE4441091A1 (de) 1996-05-23
DE59501699D1 (de) 1998-04-30
EP0717185B1 (fr) 1998-03-25
US5609143A (en) 1997-03-11
JPH08210197A (ja) 1996-08-20

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