DE3623677C1 - Exhaust gas recirculation device for an internal combustion engine - Google Patents

Exhaust gas recirculation device for an internal combustion engine

Info

Publication number
DE3623677C1
DE3623677C1 DE3623677A DE3623677A DE3623677C1 DE 3623677 C1 DE3623677 C1 DE 3623677C1 DE 3623677 A DE3623677 A DE 3623677A DE 3623677 A DE3623677 A DE 3623677A DE 3623677 C1 DE3623677 C1 DE 3623677C1
Authority
DE
Germany
Prior art keywords
exhaust gas
gas recirculation
recirculation device
valve
button
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
Application number
DE3623677A
Other languages
German (de)
Inventor
Klaus Dipl-Ing Blumensaat
Rainer Ing Bachschmid
Dieter Dipl-Ing Doerrie
Juergen Dipl-Ing Jegelka
Gernot Dipl-Ing Hertweck
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Priority to DE3623677A priority Critical patent/DE3623677C1/en
Application granted granted Critical
Publication of DE3623677C1 publication Critical patent/DE3623677C1/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/22—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
    • G01D5/2208—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils
    • G01D5/2216—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils by a movable ferromagnetic element, e.g. a core
    • 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
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

The invention relates to an exhaust gas recirculation device for an internal combustion engine with an exhaust gas recirculation valve, controlling the connection of a main exhaust pipe to a secondary exhaust pipe, and a lift sensor as inductive displacement pick-up for detecting the working position of the exhaust gas recirculation valve, the tracer having a solenoid plunger and lying between differential coils of the displacement pick-up lying on a compensating body, connected to the exhaust gas recirculation valve and adjustable to a defined position between solenoid plunger and differential coils.

Description

Die Erfindung bezieht sich auf eine Abgasrückführein­ richtung für eine Brennkraftmaschine mit einem die Ver­ bindung einer Abgashauptleitung mit einer Abgasneben­ leitung beherrschenden gegen Federkraft öffnenden Ab­ gasrückführventil nach dem Oberbegriff des Patent­ anspruchs 1.The invention relates to an exhaust gas recirculation Direction for an internal combustion engine with a ver Connection of an exhaust main with an exhaust gas line dominating against spring force opening gas recirculation valve according to the preamble of the patent claim 1.

Um einen besseren Einfluß auf die rückgeführten Abgas­ mengen ausüben zu können, ist es aus der DE-PS 32 17 287 bekannt, die jeweilige Öffnungsstellung des Abgasrück­ führventiles mit Hilfe eines als potentiometrischen Geber ausgebildeten Hubsensors zu erfassen, der auf dem Abgasrückführventil montiert ist.To have a better impact on the recirculated exhaust gas to be able to exercise quantities, it is from DE-PS 32 17 287 known, the respective open position of the exhaust gas return guide valves using a potentiometric Detector trained to detect the sensor on the Exhaust gas recirculation valve is mounted.

Der Geber besteht aus einem gemeinsam mit dem Abgas­ rückführventil sich bewegenden Schleifer, der in Schleif­ kontakt mit einem veränderbaren Widerstand steht. The sender consists of one together with the exhaust gas return valve moving grinder that is in grinding contact with a variable resistor.  

Geber dieser Art sind aufgrund motorbedingter Schwingungen nur begrenzt dauerhaltbar, da der Schleifer nach einer gewissen Betriebszeit Spuren hinterläßt, die zu unzu­ verlässigen Signalabgaben bis hin zum Signalausfall führen.This type of encoder is due to motor-related vibrations has only a limited shelf life, since the grinder after one leaves certain traces of operation that are too reliable signal delivery up to signal failure to lead.

Der Erfindung liegt die Aufgabe zugrunde, unter Be­ rücksichtigung einer niedrigen Bauhöhe solche Maß­ nahmen an einer Abgasrückführeinrichtung zu treffen, durch die ein störunanfälliger Betrieb des Abgas­ rückführventiles unter Einhaltung eines weitgehend konstanten Verhältnisses zwischen Weg und Ausgangs­ signal des Gebers (Geradlinigkeit) sichergestellt ist.The invention is based, under Be considering a low height such dimension participated in an exhaust gas recirculation device to meet due to the failure-prone operation of the exhaust gas return valves in compliance with a largely constant relationship between path and exit signal of the encoder (straightness) is ensured.

Diese Aufgabe wird bei einer gattungsgemäßen Einrichtung durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale gelöst.This task is carried out in a generic facility by the in the characterizing part of claim 1 specified features solved.

Der induktive Weggeber ermöglicht ein berührungsloses, verschleißfreies Meßverfahren, bei dem nicht vermeid­ bare Toleranzketten zwischen einzelnen Bauteilen des Abgasrückführventiles und Weggebers durch den einstell­ baren Ausgleichskörper ausgeglichen werden. Die Differenz­ spulen sind durch die Positionierung des Tauchankers zu­ gunsten der Bauhöhe entsprechend kurz auszuführen, ohne das konstante Verhältnis zwischen Weg und Ausgangssignal bzw. die hohe Auflösung oder Geradlinigkeit zu beeinträchtigen. Die Verbindung zwischen dem Taster und dem Ausgleichskörper beruht auf dem Tasterprinzip. Koaxialitätsfehler und sonstige Abweichungen werden hierdurch vermieden. The inductive displacement sensor enables contactless, wear-free measuring method, which is not avoided bare tolerance chains between individual components of the Exhaust gas recirculation valves and displacement sensors through the equal compensation body can be compensated. The difference Coils can be closed by positioning the plunger in favor of the overall height short, without the constant relationship between path and output signal or impair the high resolution or straightness. The connection between the button and the compensation body is based on the button principle. Coaxiality error and other deviations are avoided.  

Durch die besondere Ausbildung der Tasterfeder als Kegel­ feder ergibt sich eine weitere Bauhöhenreduzierung.Due to the special design of the stylus spring as a cone there is a further reduction in overall height.

Ein weiterer Vorteil ist durch das ballig ausgestaltete Ende des Tasters gegeben, das somit lediglich Punkt­ berührung mit dem Einsatzelement des Ausgleichskörpers hat.Another advantage is the crowned design Given the end of the button, this is only a point contact with the insert element of the compensating body Has.

Anhand eines in der Zeichnung dargestellten Ausführungs­ beispieles wird die Erfindung näher erläutert. Es zeigtBased on an execution shown in the drawing example, the invention is explained in more detail. It shows

Fig. 1 eine Abgasrückführeinrichtung mit Abgasrück­ führventil und Weggeber und Fig. 1 is an exhaust gas recirculation device with exhaust gas recirculation valve and displacement sensor and

Fig. 2 in vergrößertem Maßstab in Schnittdarstellung das Abgasrückführventil und den Weggeber. Fig. 2 in an enlarged scale in a sectional view of the exhaust gas recirculation valve and the displacement sensor.

Die in Fig. 1 gezeigte Abgasrückführeinrichtung für luft­ verdichtende Einspritzbrennkraftmaschinen 1 zur ge­ steuerten Rückführung von Abgasmengen in das Saugsystem der Brennkraftmaschine besteht im wesentlichen aus einer von einer Abgashauptleitung 2 abzweigenden und zu einer Saugleitung 3 führenden Abgasnebenleitung 4 mit einem Abgasrückführventil 5 als Tellerventil (im folgenden AGR-Ventil genannt) und einem induktiven Weggeber 6.The exhaust gas recirculation device shown in FIG. 1 for air-compressing injection internal combustion engines 1 for the controlled return of exhaust gas quantities into the intake system of the internal combustion engine essentially consists of an exhaust gas secondary line 4 branching from an exhaust main line 2 and leading to a suction line 3 with an exhaust gas recirculation valve 5 as a poppet valve (hereinafter EGR valve) and an inductive displacement sensor 6 .

Der prinzipielle Aufbau des AGR-Ventils 5 und des induktiven Weggebers 6 ist in Fig. 2 gezeigt. Das mit 7 bezeichnete Gehäuseoberteil dient als Geberträger, in dessen zylindrischer Ausnehmung 8 der Weggeber 6 fixiert ist. Differentialspulen 9 bzw. koaxial übereinander­ liegende Spulen des Weggebers 6 umgeben eine Gleitlagerhülse 10 für einen Taster 11, der an seinem einen Ende einen Tauchanker 12 aufweist und an seinem dem AGR-Ventil 5 zugewandten anderen Ende 13 ballig ausgebildet ist.The basic structure of the EGR valve 5 and the inductive displacement sensor 6 is shown in FIG. 2. The upper housing part designated 7 serves as a transmitter carrier, in the cylindrical recess 8 of which the travel sensor 6 is fixed. Differential coils 9 or coaxially superimposed coils of the displacement sensor 6 surround a slide bearing sleeve 10 for a pushbutton 11 , which has an immersion armature 12 at one end and is convex at its other end 13 facing the EGR valve 5 .

Am Ventilschaft 14 des AGR-Ventils 5 ist eine zwischen Gehäuseoberteil 7 und Gehäuseunterteil 15 eingespannte Membran 16 sowie ein Ausgleichskörper 17 fest ange­ ordnet, der sich aus einem zylindrischen Aufnahmeventil 18 und einem topfförmigen einstellbaren Einsatzelement 19 zusammensetzt.On the valve stem 14 of the EGR valve 5 is a clamped between the upper housing part 7 and lower housing part 15 membrane 16 and a compensating body 17 is arranged, which is composed of a cylindrical receiving valve 18 and a cup-shaped adjustable insert element 19 .

Das Einsatzelement 19 ist Auflagefläche für den sich unter der Federkraft einer kegelförmigen Tasterfeder 20 abstützenden Taster 11. Ein Ende der Tasterfeder 20 ist in einer in der zylindrischen Ausnehmung 8 des Ge­ häuseoberteils 7 endseitig gelegenen Führungsringnut 21 gelagert, während das andere Federende an einem in einer Nut 22 des Tasters 11 geführten Sicherungsringes 23 anliegt.The insert element 19 is a contact surface for the button 11, which is supported under the spring force of a conical button spring 20 . One end of the key spring 20 is mounted in a cylindrical recess 8 of the Ge housing upper part 7 end guide ring groove 21 , while the other spring end rests on a guided in a groove 22 of the button 11 locking ring 23 .

Mit 24 ist eine den Ausgleichkörper 17 umgebende Membran­ feder bezeichnet, die das AGR-Ventil 5 in Schließ­ stellung hält, mit 25 ist ein pneumatischer Anschluß für die Druckbeaufschlagung des AGR-Ventils 5 und mit 26 ist ein elektrischer Anschluß für die Rückmeldung der jeweiligen Öffnungsstellung des AGR-Ventils 5 bezeichnet.With 24 a compensating body 17 surrounding membrane spring is called, which holds the EGR valve 5 in the closed position, with 25 is a pneumatic connection for pressurizing the EGR valve 5 and with 26 is an electrical connection for the feedback of the respective open position of the EGR valve 5 .

Um bei der Fertigmontage des Gehäuseoberteils 7 als Geberträger mit dem Gehäuseunterteil 15 als AGR-Ventilträger eine definierte Lage zwischen Tauchanker 12 und Differential­ spulen 9 zu erhalten, ist zuvor das Einsatzelement 19 in dem Aufnahmeteil 18 auf einen Sollabstand zwischen dem unteren Tasterende und der Membran-Einspannfläche 15 a des Gehäuseunterteils 15 zu führen und z. B. durch Punkt­ schweißen zu fixieren.In order to obtain a defined position between plunger armature 12 and differential coils 9 in the final assembly of the upper housing part 7 as an encoder carrier with the lower housing part 15 as an EGR valve carrier, the insert element 19 is previously in the receiving part 18 to a desired distance between the lower end of the button and the membrane Clamping surface 15 a of the lower housing part 15 to guide and z. B. by spot welding to fix.

Dieser Sollabstand soll einer Lage des Tasters 11 bei halb geöffnetem AGR-Ventil 5 entsprechen, bei der der Tauchanker 11 in seiner Längsmitte "a" genau in Höhe der Trennebene "b" der Differentialspulen 9 a, 9 b liegt.This desired distance to a position of the probe 11 at half open EGR valve 5 correspond, in which the plunger 11 in its longitudinal center "a" exactly equal to the separation plane "b" of the differential coils 9 a, 9 b is.

Claims (4)

1. Abgasrückführeinrichtung für eine Brennkraft­ maschine mit einem die Verbindung einer Abgashaupt­ leitung mit einer Abgasnebenleitung beherrschenden, gegen Federkraft öffnenden Abgasrückführventil, dessen Ventilschaft mit einer unterdruckbeaufschlagbaren Membran gekoppelt ist, und mit einem Hubsensor zum Erfassen der Arbeitsposition des Abgasrückführventiles, dadurch gekennzeichnet, daß der Hubsensor als induktiver Weggeber (6) mit einem einen Tauchanker (12) aufweisenden Taster (11) zwischen Differentialspulen (9) ausgebildet ist, wobei der Taster (11) unterstützt durch eine Tasterfeder (20) auf einem mit dem Ventilschaft (14) verbundenen, auf eine definierte Lage zwischen Tauchanker (12) und Differentialspulen (9) ein­ stellbaren Ausgleichskörper (17) liegt.1. Exhaust gas recirculation device for an internal combustion engine with a connection of an exhaust main line with a secondary exhaust gas line, against spring force opening exhaust gas recirculation valve, the valve stem of which is coupled to a diaphragm that can be subjected to vacuum, and with a stroke sensor for detecting the working position of the exhaust gas recirculation valve, characterized in that the stroke sensor is formed as an inductive displacement sensor (6) having a a solenoid plunger (12) switch (11) between the differential coils (9), wherein the feeler (11) supported by a button spring (20) on a part connected to the valve stem (14) on a defined position between the plunger armature ( 12 ) and differential coils ( 9 ) is an adjustable compensating body ( 17 ). 2. Abgasrückführeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Ausgleichskörper (17) aus einem an dem Ventil­ schaftende befestigten und konzentrisch zur Membran­ feder (24) liegenden zylindrischen Aufnahmeteil (18) sowie aus einem in diesem einstellbaren und fixierbaren Einsatzelement (19) als Abstützung für den Taster (11) besteht. 2. Exhaust gas recirculation device according to claim 1, characterized in that the compensating body ( 17 ) from a shaft attached to the valve and concentric to the diaphragm spring ( 24 ) lying cylindrical receiving part ( 18 ) and from an adjustable and fixable insert element ( 19 ) in this as Support for the button ( 11 ) exists. 3. Abgasrückführeinrichtung nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, daß die Tastfeder (20) kegelförmige ausgebildet ist und sich einerseits auf einem Teil des als Geberträger dienenden Gehäuseoberteiles (7) und andererseits an einem in einer Nut (22) des Tasters (11) geführten Ring (23) abstützt.3. exhaust gas recirculation device according to one of claims 1 or 2,
characterized in that the key spring ( 20 ) is conical and is supported on the one hand on part of the upper housing part ( 7 ) serving as the transmitter carrier and on the other hand on a ring ( 23 ) guided in a groove ( 22 ) of the key ( 11 ). 4. Abgasrückführeinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Taster (11) an seinem dem Ausgleichskörper (17) zugewandten Ende ballig ausgebildet ist.4. Exhaust gas recirculation device according to claim 3, characterized in that the button ( 11 ) is crowned at its end facing the compensating body ( 17 ).
DE3623677A 1986-07-12 1986-07-12 Exhaust gas recirculation device for an internal combustion engine Expired DE3623677C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE3623677A DE3623677C1 (en) 1986-07-12 1986-07-12 Exhaust gas recirculation device for an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3623677A DE3623677C1 (en) 1986-07-12 1986-07-12 Exhaust gas recirculation device for an internal combustion engine

Publications (1)

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DE3623677C1 true DE3623677C1 (en) 1987-04-16

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DE3623677A Expired DE3623677C1 (en) 1986-07-12 1986-07-12 Exhaust gas recirculation device for an internal combustion engine

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841098A1 (en) * 1988-12-07 1990-06-13 Pierburg Gmbh Exhaust gas recirculation valve for an internal combustion engine
EP0636781A1 (en) * 1993-07-27 1995-02-01 Bayerische Motoren Werke Aktiengesellschaft Mixing valve, especially an exhaust gas recirculation valve for an internal combustion engine
EP0900329A1 (en) * 1996-05-20 1999-03-10 Borg-Warner Automotive, Inc. Automotive fluid control system with pressure balanced solenoid valve
EP1331389A1 (en) * 1996-05-20 2003-07-30 BorgWarner, Inc. Automotive fluid control system with pressure balanced solenoid valve
EP1852586A2 (en) * 2006-05-04 2007-11-07 smk systeme metall kunststoff gmbh & co. Load pressure regulator for exhaust gas turbo charger of combustion engines for automobiles
EP1852588A3 (en) * 2006-05-04 2009-04-22 smk systeme metall kunststoff gmbh & co. Load pressure regulator for exhaust gas turbo charger of combustion engines for automobiles
EP1852587A3 (en) * 2006-05-04 2009-04-29 smk systeme metall kunststoff gmbh & co. Load pressure regulator for exhaust gas turbocharger of combustion engines for automobiles
EP2159405A2 (en) * 2008-08-28 2010-03-03 Hirschmann Automotive GmbH Linear distance measurement for pressure and vacuum units of an AGR valve system
EP2161460A1 (en) 2008-09-09 2010-03-10 Tyco Electronics AMP GmbH Contactless position sensor with displacement transmission structure and displacement transmission structur therefor
DE102008063793A1 (en) * 2008-12-17 2010-07-01 Smk Systeme Metall Kunststoff Gmbh & Co. Kg. Pneumatic actuator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3217287C2 (en) * 1981-05-08 1984-04-19 Honda Giken Kogyo K.K., Tokyo Exhaust gas recirculation control system for internal combustion engines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3217287C2 (en) * 1981-05-08 1984-04-19 Honda Giken Kogyo K.K., Tokyo Exhaust gas recirculation control system for internal combustion engines

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841098A1 (en) * 1988-12-07 1990-06-13 Pierburg Gmbh Exhaust gas recirculation valve for an internal combustion engine
EP0636781A1 (en) * 1993-07-27 1995-02-01 Bayerische Motoren Werke Aktiengesellschaft Mixing valve, especially an exhaust gas recirculation valve for an internal combustion engine
EP0900329A1 (en) * 1996-05-20 1999-03-10 Borg-Warner Automotive, Inc. Automotive fluid control system with pressure balanced solenoid valve
EP0900329A4 (en) * 1996-05-20 2000-09-06 Borg Warner Automotive Automotive fluid control system with pressure balanced solenoid valve
EP1331389A1 (en) * 1996-05-20 2003-07-30 BorgWarner, Inc. Automotive fluid control system with pressure balanced solenoid valve
EP1852586A3 (en) * 2006-05-04 2009-04-22 smk systeme metall kunststoff gmbh & co. Load pressure regulator for exhaust gas turbo charger of combustion engines for automobiles
EP1852586A2 (en) * 2006-05-04 2007-11-07 smk systeme metall kunststoff gmbh & co. Load pressure regulator for exhaust gas turbo charger of combustion engines for automobiles
EP1852588A3 (en) * 2006-05-04 2009-04-22 smk systeme metall kunststoff gmbh & co. Load pressure regulator for exhaust gas turbo charger of combustion engines for automobiles
EP1852587A3 (en) * 2006-05-04 2009-04-29 smk systeme metall kunststoff gmbh & co. Load pressure regulator for exhaust gas turbocharger of combustion engines for automobiles
EP2159405A2 (en) * 2008-08-28 2010-03-03 Hirschmann Automotive GmbH Linear distance measurement for pressure and vacuum units of an AGR valve system
EP2159405A3 (en) * 2008-08-28 2012-11-07 Hirschmann Automotive GmbH Linear distance measurement for pressure and vacuum units of an AGR valve system
EP2161460A1 (en) 2008-09-09 2010-03-10 Tyco Electronics AMP GmbH Contactless position sensor with displacement transmission structure and displacement transmission structur therefor
DE102008063793A1 (en) * 2008-12-17 2010-07-01 Smk Systeme Metall Kunststoff Gmbh & Co. Kg. Pneumatic actuator

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