WO2008011973A1 - Dispositif de régulation du flux fluidique - Google Patents

Dispositif de régulation du flux fluidique Download PDF

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Publication number
WO2008011973A1
WO2008011973A1 PCT/EP2007/006018 EP2007006018W WO2008011973A1 WO 2008011973 A1 WO2008011973 A1 WO 2008011973A1 EP 2007006018 W EP2007006018 W EP 2007006018W WO 2008011973 A1 WO2008011973 A1 WO 2008011973A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid flow
flow control
control device
cylinder
exhaust gas
Prior art date
Application number
PCT/EP2007/006018
Other languages
German (de)
English (en)
Inventor
Waldemar Friesenhahn
Ulrich Maucher
Predrag Panic
Original Assignee
Behr Gmbh & Co. Kg
Behr Thermot-Tronik 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 Behr Gmbh & Co. Kg, Behr Thermot-Tronik Gmbh filed Critical Behr Gmbh & Co. Kg
Priority to EP07785924A priority Critical patent/EP2047093A1/fr
Publication of WO2008011973A1 publication Critical patent/WO2008011973A1/fr

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
    • F02M26/13—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
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/59—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor

Definitions

  • the invention relates to a fluid flow control device for regulating a fluid flow, in particular an exhaust gas flow, which flows in dependence on the position of a bypass flap by a heat exchanger, in particular an exhaust gas cooler, or by a bypass.
  • the object of the invention is to provide an improved fluid flow control device according to the preamble of claim 1, which allows the control of larger fluid flows than conventional fluid flow control devices.
  • a fluid flow control device for controlling a fluid flow, in particular an exhaust gas flow, which flows as a function of the position of a bypass valve by a heat exchanger, in particular an exhaust gas cooler, or by a bypass, characterized in that the bypass valve with a hydraulically or pneumatically actuated Akto - R adopted coupled.
  • the hydraulic or pneumatically actuated actuator device By the hydraulic or pneumatically actuated actuator device relatively large actuation forces can be applied to the bypass valve. This provides the advantage that the fluid flow control device according to the invention can also be used in commercial vehicles, in which significantly larger forces or torques are required to operate the bypass valve, as in passenger cars.
  • the actuator device comprises a hydraulically or pneumatically actuated cylinder, in which a piston is reciprocally received, which is coupled to the bypass flap.
  • a further preferred embodiment of the fluid flow control device is characterized in that the actuator device, in particular the cylinder, is connected to a hydraulic or pneumatic pressure source with the interposition of a valve device.
  • the valve device does not necessarily have to be arranged in the immediate vicinity of the actuator device, but can be accommodated at another suitable location at which, for example, lower temperatures or mechanical loads are present.
  • valve device has a passage position in which a connection between the pressure source and the actuator device, in particular the cylinder, is released. If the valve device is in the through position, which is also referred to as open valve position, then the bypass valve is actuated by the actuator device.
  • a further preferred embodiment of the fluid flow control device is characterized in that the valve device has a closed position in which a connection between the Aktorein- device and a pressure sink is released.
  • the pressure sink is, for example, the environment or an input side of a pump. If the valve device is in the closed position, then the actuator device is not pressurized, but pressure relieved.
  • a further preferred embodiment of the fluid flow control device is characterized in that the bypass flap is biased into a position in which the fluid flow, in particular the exhaust gas flow, through the heat exchanger, in particular the exhaust gas cooler flows.
  • the bypass flap is preferably biased by a spring device.
  • the actuator device in particular the cylinder, is connected to a compressed air source of a motor vehicle.
  • the compressed air source is, for example, the pressure circuit of the motor vehicle.
  • the actuator device can also be connected to a charge air circuit of the motor vehicle.
  • the actuator device in particular the cylinder, is connected to an oil source of a motor vehicle.
  • the oil source is, for example, the oil circuit of the motor vehicle.
  • the actuator device can also be connected to a transmission oil circuit of the motor vehicle.
  • Figure 1 is a schematic representation of a fluid flow control device according to a first embodiment with a hydraulic actuator device
  • Figure 2 is a similar view as in Figure 1 with a pneumatic actuator device and
  • Figure 3 is a similar view as in Figure 2 with a special bypass flap. - A -
  • FIG. 1 shows a fluid flow control device 1 with a flap housing 4, which has an inlet 5. Through the input 5, the fluid flow control device 1 is supplied with recirculated exhaust gas. The recirculated exhaust gas flow is indicated by an arrow 3. In the flap housing 4, a bypass flap 6 is pivotally mounted, as indicated by a double arrow 7.
  • the recirculated exhaust gas stream 3 reaches a cooled flow path 11 or an uncooled bypass flow path 12.
  • a heat exchanger 14, in particular an exhaust gas cooler, which serves to cool the exhaust gas flow, is arranged in the cooled flow path 11. In the position of the bypass flap 6 shown in FIG. 1, the entire exhaust gas stream 3 enters the bypass flow path 12.
  • the bypass flap 6 can be actuated via an adjusting lever 16, which is arranged outside the flap housing 4. At the free end of the actuating lever 16, one end of a piston rod 18 is articulated. The other end of the piston rod 18 is fixed to a piston 19, which is guided in a cylinder 20 movable back and forth.
  • the cylinder 20 is a hydraulic cylinder that belongs to a hydraulic actuator device 21.
  • the hydraulic cylinder 20 is connected via a hydraulic line 24 to a hydraulic valve device 25.
  • the valve device 25 is connected via a hydraulic line 28 to the pressure side of a hydraulic pump 30.
  • the valve device 25 is connected via a further hydraulic line 32 to the suction side of the hydraulic pump 30.
  • the hydraulic pump 30 is preferably the oil pump of a motor vehicle. By an arrow 33, which is directed away from the pump 30, the oil supply to the engine of a motor vehicle is indicated. By an arrow 34, which is directed towards the pump 30, an oil drain from the engine of the motor vehicle is indicated.
  • the hydraulic cylinder 20 When the valve device 25 is in a passage position, the hydraulic cylinder 20 is supplied with hydraulic oil via the hydraulic line 28 and 24 from the hydraulic pump 30. When the valve device 25 is brought from its passage position, which is also referred to as the open position, in its closed position, then the hydraulic cylinder 20 is depressurized via the hydraulic line 24 and the hydraulic line 32. As soon as there is no overpressure in the hydraulic cylinder 20, the piston 19 is moved to the right by a return spring 35, which is biased in the cylinder 20 against the piston 19, so that the bypass valve 6 from that shown in FIG Position moves to a position (not shown) in which the bypass flow path 12 is closed and the cooled flow path 11 is opened. Due to the spring force of the return spring 35, the bypass flap 6 is biased in its position for exhaust gas cooling.
  • Motor oil is particularly suitable for the hydraulic actuation shown schematically in FIG. 1, since this is usually already available in the vicinity of the exhaust gas cooler and thus also of the actuator for the bypass flap.
  • the oil removal at the oil pump outlet, before or after the oil filter, or on a turbocharger may be expedient, where high oil pressures exist, which allow small actuator cross sections, but also at any other point in the circuit.
  • the return of the oil from the actuator can take place anywhere in the engine block or directly to the pump inlet. But it can also be used oil from other oil circuits, such as gear oil.
  • the hydraulic actuation is particularly suitable in cases in which the valve is arranged at a large distance from the actuator, since due to the incompressible property of the oil, no high volume flows for pressure equalization in the connecting line are required.
  • FIG. 2 shows a fluid flow control device 41 is schematically illustrated, which is similar to the fluid flow control device 1 of Figure 1.
  • the same reference numerals are used. To avoid repetition, reference is made to the preceding description of FIG. In the following, the differences between the two embodiments are mainly discussed.
  • the cylinder 20 is a pneumatic cylinder which is connected to a pneumatic valve device 45 via a pneumatic line 44.
  • the pneumatic valve device 45 is connected via a compressed air supply line 48 to the compressed air circuit of a motor vehicle.
  • the pneumatic valve device 45 is a vent valve that blows into the environment.
  • the valve device 45 has a passage position in which a compressed air connection via the pneumatic line 48 and 44 is released, so that the bypass flap 6 is moved to the position shown in FIG.
  • an outlet for the air from the cylinder 20 is opened into the environment, so that in the pneumatic cylinder 20 no pressure is applied more and the bypass valve 6, for example, by spring force, is returned to its original position.
  • the fluid flow control device 41 with the pneumatic cylinder 20 has the advantage that only one pneumatic line 48, 44 is required from the compressed air supply to the valve device 45 and from the valve device 45 to the actuator device 21. This is achieved in that when closing the valve device 45, the air is blown out of the pneumatic cylinder 20 into the environment.
  • FIG. 3 shows a fluid flow control device 71, which is similar to the fluid flow control device 41 from FIG.
  • the same reference numbers are used to designate parts. To avoid repetition, reference is made to the preceding description of Figure 2. In the following, the differences between the two embodiments are mainly discussed.
  • a special bypass flap 66 is used, which is also referred to as a butterfly flap.
  • the bypass flap 66 can be actuated via the adjusting lever 16, which is mechanically coupled to the piston rod 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

L'invention concerne un dispositif de régulation du flux fluidique servant à réguler un flux fluidique, notamment d'un flux de gaz d'échappement qui passe en fonction de la position d'un clapet de dérivation (6) au travers d'un caloporteur (11, 14), notamment d'un refroidisseur de gaz d'échappement, ou au travers d'une dérivation (12). Pour permettre la régulation de flux fluidiques plus grands, le clapet de dérivation (6) est couplé à un dispositif acteur (21) actionné hydrauliquement ou pneumatiquement.
PCT/EP2007/006018 2006-07-25 2007-07-06 Dispositif de régulation du flux fluidique WO2008011973A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07785924A EP2047093A1 (fr) 2006-07-25 2007-07-06 Dispositif de régulation du flux fluidique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006034886.9 2006-07-25
DE102006034886A DE102006034886A1 (de) 2006-07-25 2006-07-25 Fluidstromregelungseinrichtung

Publications (1)

Publication Number Publication Date
WO2008011973A1 true WO2008011973A1 (fr) 2008-01-31

Family

ID=38610532

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/006018 WO2008011973A1 (fr) 2006-07-25 2007-07-06 Dispositif de régulation du flux fluidique

Country Status (3)

Country Link
EP (1) EP2047093A1 (fr)
DE (1) DE102006034886A1 (fr)
WO (1) WO2008011973A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008008697A1 (de) * 2008-02-11 2009-08-27 Behr Gmbh & Co. Kg Aktuator für eine Bypass-Regeleinrichtung eines Bypasses bei einem Wärmetauscher, Wärmetauscher oder Baueinheit mit einem oder mehreren Wärmetauschern, Bypasssystem, Fahrzeugdiagnosesystem, Abgasrückführsystem, Ladeluftzuführsystem und Verwendung des Wärmetauschers oder der Baueinheit

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0872646A1 (fr) * 1997-04-19 1998-10-21 Technomatik Maschinenelemente GmbH & Co.Fertigungs KG Vérin pneumatique
EP0994247A2 (fr) * 1998-03-23 2000-04-19 Volkswagen Aktiengesellschaft Arrangement d'une soupape pour la commande d'un flux de gaz d'échappement recyclé
EP1030050A1 (fr) * 1999-02-16 2000-08-23 Siebe Automotive (Deutschland) GmbH Système de recirculation de gaz d'échappement
EP1258603A1 (fr) * 2001-05-14 2002-11-20 MAN Steyr AG Moteur pour véhicule comprenant un dispositif de frein moteur et un système de recirculation des gaz d'échappement
US20040206342A1 (en) * 2003-04-15 2004-10-21 Moyer Michael A. Exhaust gas recirculation cooler with bypass flow
US20050028797A1 (en) * 2003-08-08 2005-02-10 Janssen John M. Dual mode EGR valve
DE10346250A1 (de) * 2003-10-06 2005-05-12 Bayerische Motoren Werke Ag Abgaskühler mit einem Bypass
EP1624168A2 (fr) * 2004-08-06 2006-02-08 Technomatik GmbH & Co. KG Vérin pneumatique et méthode pour contrôler en continu la position d'un cylindre pneumatique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10355649B4 (de) * 2003-11-28 2008-02-14 Benteler Automobiltechnik Gmbh Längsdurchströmter Abgaskühler
DE102005021395A1 (de) * 2004-05-07 2006-01-26 Behr Gmbh & Co. Kg Wärmetauscher, insbesondere für Abgaskühler von Brennkraftmaschinen

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0872646A1 (fr) * 1997-04-19 1998-10-21 Technomatik Maschinenelemente GmbH & Co.Fertigungs KG Vérin pneumatique
EP0994247A2 (fr) * 1998-03-23 2000-04-19 Volkswagen Aktiengesellschaft Arrangement d'une soupape pour la commande d'un flux de gaz d'échappement recyclé
EP1030050A1 (fr) * 1999-02-16 2000-08-23 Siebe Automotive (Deutschland) GmbH Système de recirculation de gaz d'échappement
EP1258603A1 (fr) * 2001-05-14 2002-11-20 MAN Steyr AG Moteur pour véhicule comprenant un dispositif de frein moteur et un système de recirculation des gaz d'échappement
US20040206342A1 (en) * 2003-04-15 2004-10-21 Moyer Michael A. Exhaust gas recirculation cooler with bypass flow
US20050028797A1 (en) * 2003-08-08 2005-02-10 Janssen John M. Dual mode EGR valve
DE10346250A1 (de) * 2003-10-06 2005-05-12 Bayerische Motoren Werke Ag Abgaskühler mit einem Bypass
EP1624168A2 (fr) * 2004-08-06 2006-02-08 Technomatik GmbH & Co. KG Vérin pneumatique et méthode pour contrôler en continu la position d'un cylindre pneumatique

Also Published As

Publication number Publication date
DE102006034886A1 (de) 2008-01-31
EP2047093A1 (fr) 2009-04-15

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