EP2052145B1 - Schwingungs- und pulsationsgedämpfter elektropneumatischer wandler - Google Patents

Schwingungs- und pulsationsgedämpfter elektropneumatischer wandler Download PDF

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Publication number
EP2052145B1
EP2052145B1 EP07802469A EP07802469A EP2052145B1 EP 2052145 B1 EP2052145 B1 EP 2052145B1 EP 07802469 A EP07802469 A EP 07802469A EP 07802469 A EP07802469 A EP 07802469A EP 2052145 B1 EP2052145 B1 EP 2052145B1
Authority
EP
European Patent Office
Prior art keywords
armature
valve
damping element
electropneumatic converter
damping
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.)
Not-in-force
Application number
EP07802469A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2052145A1 (de
Inventor
Rolf Dohrmann
Janusz Zurke
Alvito Fernandes
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.)
Pierburg GmbH
Original Assignee
Pierburg 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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP2052145A1 publication Critical patent/EP2052145A1/de
Application granted granted Critical
Publication of EP2052145B1 publication Critical patent/EP2052145B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M26/56—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves
    • F02M26/57—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves using electronic means, e.g. electromagnetic valves

Definitions

  • the invention relates to an electropneumatic converter, which is used for example for pneumatic control in motor vehicles by a mixing pressure is formed from the intake pressure of an internal combustion engine and the atmospheric pressure, which is a consumer, for example, an exhaust gas recirculation valve supplied.
  • Such a converter is for example in DE 41 10 003 C1 described.
  • This has three ports, wherein the first port is subjected to a negative pressure and the second port to atmospheric pressure and the third port to a mixing pressure of the first and the second port, which is supplied to a consumer, such as an exhaust gas recirculation valve.
  • this converter has a valve device and a fixedly connected thereto plunger armature, which is displaceable by an electromagnet, so that the position of the valve device can be changed and the consumer supplied mixing pressure can be controlled.
  • the valve device and the anchor connected to it are suspended in the axial direction movable on a membrane.
  • pulsations may occur in a state in which the electromagnet is not traversed by a current and thus can not transmit force to the plunger armature and the valve device. Unwanted vibrations of the plunger armature and the valve device lead to disturbances in the operation of the internal combustion engine.
  • the object of the invention is to provide an electropneumatic pressure transducer, which allows improved, trouble-free operation of the internal combustion engine.
  • a damping element is provided for damping the axial movement of the armature and the valve device connected to it.
  • the invention allows a reduction of pulsations in the de-energized state and in the operating range of the electropneumatic converter. Furthermore, the invention leads to a better large and small signal behavior of the electropneumatic converter during the ventilation process.
  • the damping element may in particular be arranged between the valve device and a housing. Also, the damping element between the armature and an iron core located under the armature can be arranged.
  • the damping element may be formed, for example, as a membrane.
  • the damping element as described above, be mounted at different locations of the electropneumatic transducer, so that a damping of the axial movement of the armature and the valve device connected to it is made possible.
  • the damping element in the suspension device, through which the valve body and the armature connected to it are suspended in the axial direction movable.
  • the damping element can be realized by integrated in the suspension damping legs, whereby the installation of an additional damping element is eliminated.
  • the damping element can be integrated into other existing components of the electropneumatic transducer, i. In addition to their actual function, these components can also fulfill a damping function with respect to the axial movement of the armature and the valve device connected to it. The use of an additional damping element is not necessary in such an arrangement.
  • integrated means in this context that the further component and the damping element are integrally formed, wherein the damping element and the further component are two components which are fixedly connected to each other, or it is in the damping element and the further component to a single component acts, which is monolithic.
  • the damping element at the acted upon by the atmospheric pressure ventilation side of the electropneumatic converter.
  • the closing process of the valve device can be delayed for a short time, as a result of which the behavior of the electropneumatic converter is improved, in particular in the small signal range becomes.
  • the valve plate of the bellows closes the vacuum tube, which may be formed in particular as a brass tube, and the ventilation takes place on the bellows over.
  • the force introduced by the damping element on the armature causes the second valve seat integrated in the armature to be closed in a delayed manner. Due to the sealing surface of the bellows, the vacuum connection (negative pressure source / pump) is kept closed as long as possible to allow ventilation.
  • the damping element may be formed as a damping membrane in the form of an elastomeric ring, in which or in which the armature is mounted.
  • an electropneumatic converter has a negative pressure port 10, an atmospheric pressure port 12, and a mixed pressure port 14 which is supplied with a mixed pressure of the negative pressure port 10 and the atmospheric pressure port 12.
  • the mixing pressure is supplied via the mixing pressure connection 14 to a consumer, in particular an exhaust gas recirculation valve.
  • the valve device 18, 28 has a valve body 18 with a valve plate 28.
  • the valve body is connected via a diaphragm 20 with a housing 32 such that it is movable in the axial direction 30.
  • the membrane 20 is guided in a ring around the valve body 18 and secured in an annular recess of the housing 32 and a housing cover by clamping. Between the valve body 18 and the housing 32 or housing cover, the membrane 20 has a substantially arcuate course.
  • the membrane 20 is also secured to the valve body 18 in a recess which leads around the valve body 18 in an annular manner.
  • an armature 16 is fixedly connected and also movable in the axial direction.
  • the armature 16 comprises a magnetic material and can be moved by applying an electric current to an electromagnet 17.
  • the electric coil of the electromagnet 17 is surrounded by an iron sheath 38 for bundling the magnetic field lines. Furthermore, an air gap 40 is formed between the armature 16 and the iron sheath 38, in which an adjustable iron core 34 is arranged such that the length of the air gap 40 is variable. In addition, a second iron core 36 is provided, which projects into a recess 37 of the armature 16. Between the first iron core 34 and the armature 16, a cavity 24 is formed.
  • the mixing pressure which is supplied via the mixing pressure connection 14 to a consumer, is established in a valve chamber 11, which is delimited by the membrane 20.
  • the mixing pressure results from the pressure which is supplied to the electropneumatic valve via the vacuum connection and the air pressure which is supplied to the electropneumatic valve via the atmospheric pressure connection 12.
  • valve plate 28 is integrally formed with the elastomer bellows 19 and thereby resiliently connected to the armature 16. Through the valve plate 28, the vacuum port can be opened and closed.
  • the essential feature of the electro-pneumatic converter according to the invention is the damping element 26, which according to Fig. 1 is formed as a bellows made of elastomer, and between a valve seat collar 56 and the coil rib 27 is arranged.
  • the damping element 26 is according to the FIGS. 2 and 2a formed as part of the membrane 20, and can with this membrane 20 in a Injection molding be made in one piece. Analogous to the FIGS. 1 and 1a the effect of the damping element 26 takes place in that it is supported on one side on the coil rib 27 and on the opposite side introduces a force into the membrane 20 connected to it.
  • the damping element 26 is attached to the ventilation side of the electropneumatic converter, ie, on the side which is directly connected to the atmospheric pressure port 12.
  • the damping element 26 is also disposed within the cavity 22.
  • FIGS. 3 and 3a For example, an elastomeric damping element 26 disposed within a cavity 24 formed between the armature 16 and the iron core 34 is shown.
  • Figures 4 and 4a show in the same place a damping element of a foam body.
  • the damping element may be formed as a damping diaphragm 50 and in particular as an elastomer ring, in which or in which the armature 16 is mounted.
  • the elastomeric ring preferably comprises silicone.
  • the strokes of the armature 16 and the valve means 18, 28 are damped by mounted on the housing 32 stops 44, 46, 48. These are preferably located at the location of the housing 32 to which the valve body 18 moves upon movement in the direction of the force exerted by the diaphragm 20.
  • a thicker damping membrane 50 can be used, which has recesses and is thus made more flexible.
  • the valve body 18 For receiving the damping diaphragm 50, the valve body 18 has a preferably annular groove 52.
  • the stop 46 has a groove-shaped recess 54 through which ventilation can take place.
  • the stops 46, 48 may be formed, for example, of plastic.
  • a spring 42 may be formed between the valve body 18 and the housing 32. This is inventively used in conjunction with other damping elements 26, 50.
  • damping element for example, only on one side of the armature or the valve means may be provided, or even a plurality of damping elements, which are arranged on one or more sides of the armature and the valve means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
EP07802469A 2006-08-18 2007-08-02 Schwingungs- und pulsationsgedämpfter elektropneumatischer wandler Not-in-force EP2052145B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006038920A DE102006038920B4 (de) 2006-08-18 2006-08-18 Schwingungs- und pulsationsgedämpfter elektropneumatischer Wandler
PCT/EP2007/058009 WO2008019949A1 (de) 2006-08-18 2007-08-02 Schwingungs- und pulsationsgedämpfter elektropneumatischer wandler

Publications (2)

Publication Number Publication Date
EP2052145A1 EP2052145A1 (de) 2009-04-29
EP2052145B1 true EP2052145B1 (de) 2011-06-29

Family

ID=38616575

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07802469A Not-in-force EP2052145B1 (de) 2006-08-18 2007-08-02 Schwingungs- und pulsationsgedämpfter elektropneumatischer wandler

Country Status (6)

Country Link
US (1) US8001952B2 (enExample)
EP (1) EP2052145B1 (enExample)
JP (1) JP5185934B2 (enExample)
AT (1) ATE514852T1 (enExample)
DE (1) DE102006038920B4 (enExample)
WO (1) WO2008019949A1 (enExample)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2935771B1 (fr) * 2008-09-09 2010-10-08 Bontaz Centre Sa Dispositif de commande de l'alimentation d'un systeme avec un fluide
DE102009007118B4 (de) * 2009-02-02 2015-07-16 Pierburg Gmbh Druckregelventil
DE102009032374B3 (de) * 2009-07-08 2010-12-30 Pierburg Gmbh Druckregelventil
CN102182597B (zh) * 2011-03-29 2013-10-02 南京航空航天大学 高转速燃油电磁阀及其闭合始点的测量方法
US20120305822A1 (en) * 2011-05-10 2012-12-06 Delphi Technologies, Inc. Electronic control valve having an integral non-contact noise mitigation device
CN102588153A (zh) * 2012-03-26 2012-07-18 无锡隆盛科技有限公司 一种真空电磁调节器
DE102013008686A1 (de) * 2013-05-22 2014-11-27 Volkswagen Aktiengesellschaft Schaltsaugrohr
DE102015102545B4 (de) * 2015-02-23 2017-06-01 Pierburg Gmbh Elektropneumatischer Druckwandler
US11293564B2 (en) 2020-06-05 2022-04-05 Automatic Switch Company Valve silencing choke

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59183061A (ja) 1983-04-01 1984-10-18 Nippon Denso Co Ltd 圧力制御弁
JPS59190461A (ja) * 1983-04-11 1984-10-29 Nippon Soken Inc 大気圧補償付負圧制御弁
DE8322570U1 (de) * 1983-08-05 1985-01-17 Robert Bosch Gmbh, 7000 Stuttgart Druckregler
US4988074A (en) * 1988-05-17 1991-01-29 Hi-Ram, Inc. Proportional variable force solenoid control valve
DE4110003C1 (en) * 1991-03-27 1992-07-16 Pierburg Gmbh, 4040 Neuss, De Electromagnetic pressure transducer for pneumatic control of motor vehicle - has aperture set by adjustable iron@ core having opening for receiving plunger
JPH0530665U (ja) * 1991-09-30 1993-04-23 エヌオーケー株式会社 電磁弁
DE4205565C2 (de) 1992-02-22 2002-10-31 Pierburg Gmbh Elektropneumatischer Druckwandler
DE4329760A1 (de) * 1993-09-03 1995-03-09 Bosch Gmbh Robert Elektromagnetisch betätigbares Proportionalventil
DE4332117B4 (de) * 1993-09-22 2005-05-04 Robert Bosch Gmbh Elektromagnetventil
DE4342566B4 (de) 1993-12-14 2004-09-30 Robert Bosch Gmbh Elektromagnetisch betätigbares Proportionalventil
DE4404740A1 (de) * 1994-02-15 1995-08-17 Bosch Gmbh Robert Magnetventil
US5513832A (en) 1994-04-22 1996-05-07 Lectron Products, Inc. Variable force solenoid valve
DE19755956C2 (de) 1997-12-17 2002-06-27 Pierburg Ag Ventilschließglied für Druckwandler oder Steuer- und Regelventile
DE10327875B4 (de) * 2002-11-14 2005-03-03 Woco Industrietechnik Gmbh Tauchankersystem mit einstellbarer magnetischer Durchflutung
US7205685B2 (en) * 2002-11-14 2007-04-17 Woco Industrietechnik Gmbh Solenoid plunger system with an adjustable magnetic flux

Also Published As

Publication number Publication date
DE102006038920B4 (de) 2013-01-31
US8001952B2 (en) 2011-08-23
ATE514852T1 (de) 2011-07-15
JP5185934B2 (ja) 2013-04-17
WO2008019949A1 (de) 2008-02-21
EP2052145A1 (de) 2009-04-29
US20100163007A1 (en) 2010-07-01
JP2010501057A (ja) 2010-01-14
DE102006038920A1 (de) 2008-02-21

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