EP0487554B1 - Idle running rotary actuator - Google Patents

Idle running rotary actuator Download PDF

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Publication number
EP0487554B1
EP0487554B1 EP90911413A EP90911413A EP0487554B1 EP 0487554 B1 EP0487554 B1 EP 0487554B1 EP 90911413 A EP90911413 A EP 90911413A EP 90911413 A EP90911413 A EP 90911413A EP 0487554 B1 EP0487554 B1 EP 0487554B1
Authority
EP
European Patent Office
Prior art keywords
rotor
shaft
idle speed
sensor
stabilizer according
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 - Lifetime
Application number
EP90911413A
Other languages
German (de)
French (fr)
Other versions
EP0487554A1 (en
Inventor
Klaus Neidhard
Harald Kalippke
Friedrich Wendel
Erhard Renninger
Wolfgang Staudemaier
Johannes Meiwes
Albert Gerhard
Dieter Dick
Herbert Becker
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.)
OFFERTA DI LICENZA AL PUBBLICO OFFERTA DI LICENZA
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 EP0487554A1 publication Critical patent/EP0487554A1/en
Application granted granted Critical
Publication of EP0487554B1 publication Critical patent/EP0487554B1/en
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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/12—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having slidably-mounted valve members; having valve members movable longitudinally of conduit
    • F02D9/16—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having slidably-mounted valve members; having valve members movable longitudinally of conduit the members being rotatable
    • 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
    • F02M3/00—Idling devices for carburettors
    • 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
    • F02M3/00—Idling devices for carburettors
    • F02M3/06—Increasing idling speed
    • F02M3/07—Increasing idling speed by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatic means, according to engine speed
    • 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
    • F02M3/00—Idling devices for carburettors
    • F02M3/06—Increasing idling speed
    • F02M2003/067—Increasing idling speed the valve for controlling the cross-section of the conduit being rotatable, but not being a screw-like valve

Definitions

  • the invention is based on an idle turntable according to the preamble of claim 1.
  • an idle turntable From DE-OS 37 28 589 (Fam. From US-A-4 895 344) such an idle turntable is already known, the armature of which is tubular and attached to it Has permanent magnets on the outside.
  • a stator with field windings and magnetic guide bodies is arranged around the rotatable armature and is fixedly connected to the housing. The construction of this turntable is relatively complex overall.
  • the idle turntable according to the invention with the characterizing features of claim 1 has the advantage that it has a parts-saving and uncomplicated structure and is easy to assemble.
  • the entire electrical part of the servomotor is better protected by the cup-shaped shape of the rotor, for example against contamination from the pneumatic part of the rotary actuator.
  • the mounting of encoders is made easier since the housing parts around the large outer wall of the rotor and around the free shaft end on the rotary valve offer many mounting options.
  • Cup-shaped rotors are known, for example, from US-A-4 197 489.
  • the use of a rotary motor according to this document for controlling a throttle body would require substantial changes, including Adjustment of the rotational speed, turn the rotatable shaft to arrive at an arrangement according to DE-OS-37 28 589.
  • a device or an encoder for determining the rotational position of the rotary valve is particularly advantageous. This allows the idle air to be precisely controlled in electronically controlled internal combustion engines.
  • the rotary actuator 1 has a servomotor 2, the rotor 9 of which acts on a throttle element 3 which is arranged in a bypass line 4 in a housing 12.
  • the bypass line 4 is connected on both sides to an intake pipe 5 with a throttle valve for controlling the idle combustion air of an internal combustion engine.
  • the throttle element 3 is seated in an opening 15 of the housing 12 which intersects the bypass line 4 and is designed as a rotary slide valve which more or less closes a control opening 6 in the bypass line 4.
  • the arrow indicates the direction of flow in the bypass line 4.
  • the servomotor 2 consists of a cup-shaped rotor 9 and a central stator 7 with field windings 8, which stator 7 is arranged within the rotor 9.
  • the rotor 9 has a disk-shaped base 16 and a cylindrical jacket-shaped wall 17 extending from the circumference thereof.
  • Non-polar permanent magnet segments 10 are preferably arranged on the wall 17.
  • the permanent magnet segments 10 are bowl-shaped and cover an angular range of approximately 135 ° each.
  • a bore 18 is arranged centrally, which receives a smooth shaft 11.
  • the shaft 11 is fixedly connected to the rotor 9 and is mounted with low friction in two bearings 13, 14 held in a housing 12.
  • the throttle element 3 controlling the bypass line 4 is fastened to the shaft 11.
  • the stator 7 is fastened with its axis 20 to a plate 21 which is arranged on a housing cap 22.
  • the housing cap 22 covers the entire servomotor 2 and is connected to the housing 12 with the interposition of a sealing O-ring 23.
  • a plug attachment 25 is attached, which has a plurality of plugs 26 arranged one behind the other in the drawing for connecting electrical lines. The ends of the field windings 8 are connected to the plugs 26.
  • the idle turntable 1 has an encoder 27 for determining the actual rotational position of the shaft 11.
  • the encoder 27 can be arranged in the housing 12 at the end 28 remote from the rotor of the shaft 11 or - as shown in broken lines - opposite the free edge 29 of the wall 17 lie or be arranged at another easily accessible location on the rotor 9 or its shaft 11.
  • any location on the housing cap 22 that lies opposite the wall 17 is also suitable.
  • the housing cap 22 can be provided with a bore into which an encoder can be inserted from the outside, which touches marks on the wall 17.
  • the encoder 27 can be designed as an optical, magnetic or electrical encoder and scans corresponding optical, magnetic, mechanical or electrically effective marks 30 on the rotor 9 or its shaft 11.
  • the senor 27 can be designed as an eddy current sensor or as a potentiometer.
  • the optical marks can be bar codes, for example.
  • the electrical signals from the encoder 27 are transmitted via associated connecting lines 32 (31) e.g. transmitted to the plugs 26 or other connections to the outside. The signals can then be connected to an electronic motor control that continuously monitors and adjusts the rotary position of the throttle body.

Abstract

In order to simplify the structure and mounting of an idle running rotary actuator (1) having a rotary valve (3) that controls the throttle cross-section of the bypass line (4) in an internal combustion engine, the field coils (8) of the servomotor (2) are exclusively arranged on a stator (7) surrounded by a permanently excited bowl-shaped rotor (9). A rotary valve (3) is directly secured on the shaft (11) of the rotor (9). In order to determine the angular position of the shaft (11) or of the rotary valve (3), the rotating actuator (1) has a sensor (27), the signals of which are used by an electronic engine controller.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Leerlaufdrehsteller nach der Gattung des Anspruchs 1. Aus der DE-OS 37 28 589 (Fam. von der US-A-4 895 344) ist bereits ein solcher Leerlaufdrehsteller bekannt, dessen Anker rohrförmig ausgebildet ist und an seiner Außenseite Permanentmagnete aufweist. Um den drehbaren Anker herum ist ein Stator mit Feldwicklungen und magnetischen Leitkörpern angeordnet, der fest mit dem Gehäuse verbunden ist. Der Aufbau dieses Drehstellers ist insgesamt relativ aufwendig.The invention is based on an idle turntable according to the preamble of claim 1. From DE-OS 37 28 589 (Fam. From US-A-4 895 344) such an idle turntable is already known, the armature of which is tubular and attached to it Has permanent magnets on the outside. A stator with field windings and magnetic guide bodies is arranged around the rotatable armature and is fixedly connected to the housing. The construction of this turntable is relatively complex overall.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Leerlaufdrehsteller mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß er einen teilesparenden und unkomplizierten Aufbau aufweist und leicht zu montieren ist. Außerdem ist der gesamte elektrische Teil des Stellmotors durch die becherförmige Gestalt des Rotors besser geschützt, z.B. gegen Verschmutzung aus dem pneumatischen Teil des Drehstellers. Weiter wird die Anbringung von Gebern erleichtert, da die Gehäuseteile um die großflächige außen liegende Wand des Rotors sowie um das freie Wellenende am Drehschieber viele Anbringungsmöglichkeiten bieten.The idle turntable according to the invention with the characterizing features of claim 1 has the advantage that it has a parts-saving and uncomplicated structure and is easy to assemble. In addition, the entire electrical part of the servomotor is better protected by the cup-shaped shape of the rotor, for example against contamination from the pneumatic part of the rotary actuator. Furthermore, the mounting of encoders is made easier since the housing parts around the large outer wall of the rotor and around the free shaft end on the rotary valve offer many mounting options.

Becherförmige Rotoren sind zum Beispiel aus der US-A-4 197 489 bekannt. Die Anwendung eines Drehmotors gemäß dieser Schrift zur Steuerung eines Drosselorgans würde jedoch wesentliche Änderungen erfordern, u.a. Anpassung der Drehgeschwindigkeit, umdrehen der drehbaren Welle, um zu einer Anordnung gemäß der DE-OS-37 28 589 zu gelangen.Cup-shaped rotors are known, for example, from US-A-4 197 489. However, the use of a rotary motor according to this document for controlling a throttle body would require substantial changes, including Adjustment of the rotational speed, turn the rotatable shaft to arrive at an arrangement according to DE-OS-37 28 589.

Durch die in den Ansprüchen 2ff aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Stellmotors möglich. Besonders vorteilhaft ist eine Einrichtung bzw. ein Geber zur Bestimmung der Drehstellung des Drehschiebers. Damit läßt sich bei elektronisch geregelten Verbrennungsmotoren auch die Leerlaufluft exakt regeln.Advantageous further developments and improvements of the servomotor specified in claim 1 are possible through the measures listed in claims 2ff. A device or an encoder for determining the rotational position of the rotary valve is particularly advantageous. This allows the idle air to be precisely controlled in electronically controlled internal combustion engines.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert.An embodiment of the invention is shown in the drawing and explained in more detail in the following description.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Der Drehsteller 1 hat einen Stellmotor 2, dessen Rotor 9 auf ein Drosselorgan 3 wirkt, das in einer Bypassleitung 4 in einem Gehäuse 12 angeordnet ist. Die Bypassleitung 4 ist beidseitig an ein Ansaugrohr 5 mit Drosselklappe für die Regelung der Leerlauf-Verbrennungsluft einer Brennkraftmaschine angeschlossen. Das Drosselorgan 3 sitzt in einer die Bypassleitung 4 schneidenden Öffung 15 des Gehäuses 12 und ist als Drehschieber ausgebildet, der eine Steueröffnung 6 in der Bypassleitung 4 mehr oder weniger verschließt. Der Pfeil gibt die Strömungsrichtung in der Bypassleitung 4 an. Der Stellmotor 2 besteht aus einem becherförmigen Rotor 9 und einem zentralen Stator 7 mit Feldwicklungen 8, welcher Stator 7 innerhalb des Rotors 9 angeordnet ist. Der Rotor 9 hat einen scheibenförmigen Boden 16 und eine sich von dessen Umfang aus erstreckende zylindermantelförmige Wand 17. An der Wand 17 sind vorzugsweise ungleichpolige Permanentmagnetsegmente 10 angeordnet. Die Permanentmagnetsegmente 10 sind schalenförmig und bedecken einen Winkelbereich von je etwa 135°. In dem Boden 16 ist zentrisch eine Bohrung 18 angeordnet, die eine glatte Welle 11 aufnimmt. Die Welle 11 ist fest mit dem Rotor 9 verbunden und in zwei in einem Gehäuse 12 gehaltenen Lagern 13, 14 reibungsarm gelagert. An der Welle 11 ist das die Bypassleitung 4 steuernde Drosselorgan 3 befestigt.The rotary actuator 1 has a servomotor 2, the rotor 9 of which acts on a throttle element 3 which is arranged in a bypass line 4 in a housing 12. The bypass line 4 is connected on both sides to an intake pipe 5 with a throttle valve for controlling the idle combustion air of an internal combustion engine. The throttle element 3 is seated in an opening 15 of the housing 12 which intersects the bypass line 4 and is designed as a rotary slide valve which more or less closes a control opening 6 in the bypass line 4. The arrow indicates the direction of flow in the bypass line 4. The servomotor 2 consists of a cup-shaped rotor 9 and a central stator 7 with field windings 8, which stator 7 is arranged within the rotor 9. The rotor 9 has a disk-shaped base 16 and a cylindrical jacket-shaped wall 17 extending from the circumference thereof. Non-polar permanent magnet segments 10 are preferably arranged on the wall 17. The permanent magnet segments 10 are bowl-shaped and cover an angular range of approximately 135 ° each. In the bottom 16, a bore 18 is arranged centrally, which receives a smooth shaft 11. The shaft 11 is fixedly connected to the rotor 9 and is mounted with low friction in two bearings 13, 14 held in a housing 12. The throttle element 3 controlling the bypass line 4 is fastened to the shaft 11.

Der Stator 7 ist mit seiner Achse 20 an einer Platte 21 befestigt, die an einer Gehäusekappe 22 angeordnet ist. Die Gehäusekappe 22 überdeckt den gesamten Stellmotor 2 und ist mit dem Gehäuse 12 unter Zwischenlage eines dichtenden O-Rings 23 verbunden. An der Platte 21 ist auf der dem Stator 7 gegenüberliegenden Seite ein Steckeraufsatz 25 angebracht, der mehrere in der Zeichnung hintereinander angeordnete Stecker 26 zum Anschluß von elektrischen Leitungen aufweist. Mit den Steckern 26 sind die Enden der Feldwicklungen 8 verbunden.The stator 7 is fastened with its axis 20 to a plate 21 which is arranged on a housing cap 22. The housing cap 22 covers the entire servomotor 2 and is connected to the housing 12 with the interposition of a sealing O-ring 23. On the plate 21, on the side opposite the stator 7, a plug attachment 25 is attached, which has a plurality of plugs 26 arranged one behind the other in the drawing for connecting electrical lines. The ends of the field windings 8 are connected to the plugs 26.

Der Leerlaufdrehsteller 1 hat einen Geber 27 zur Bestimmung der wirklichen Drehstellung der Welle 11. Der Geber 27 kann im Gehäuse 12 am dem Rotor abgewandten Ende 28 der Welle 11 gegenüberliegend angeordnet sein oder - wie gestrichelt dargestellt ist - gegenüber dem freien Rand 29 der Wand 17 liegen oder an einer anderen gut zugänglichen Stelle am Rotor 9 oder dessen Welle 11 angeordnet sein. Insbesondere eignet sich auch jede Stelle an der Gehäusekappe 22, die gegenüber der Wand 17 liegt. Beispielsweise kann die Gehäusekappe 22 mit einer Bohrung versehen werden, in die von außen ein Geber einsetzbar ist, der Marken an der Wand 17 antastet. Der Geber 27 kann als optischer, magnetischer oder elektrischer Geber ausgebildet sein und tastet entsprechende optische, magnetische, mechanische oder elektrisch wirksame Marken 30 am Rotor 9 oder dessen Welle 11 ab. Insbesondere kann der Geber 27 als Wirbelstromgeber oder als Potentiometer ausgebildet sein. Die optischen Marken können beispielsweise Strichcodes sein. Die elektrischen Signale des Gebers 27 werden über zugeordnete Anschlußleitungen 32 (31) z.B. zu den Steckern 26 oder anderen Anschlüssen nach außen übertragen. Die Signale sind dann auf eine elektronische Motorsteuerung aufschaltbar, die die Drehstellung des Drosselorgans kontinuierlich überwacht und nachstellt.The idle turntable 1 has an encoder 27 for determining the actual rotational position of the shaft 11. The encoder 27 can be arranged in the housing 12 at the end 28 remote from the rotor of the shaft 11 or - as shown in broken lines - opposite the free edge 29 of the wall 17 lie or be arranged at another easily accessible location on the rotor 9 or its shaft 11. In particular, any location on the housing cap 22 that lies opposite the wall 17 is also suitable. For example, the housing cap 22 can be provided with a bore into which an encoder can be inserted from the outside, which touches marks on the wall 17. The encoder 27 can be designed as an optical, magnetic or electrical encoder and scans corresponding optical, magnetic, mechanical or electrically effective marks 30 on the rotor 9 or its shaft 11. In particular, the sensor 27 can be designed as an eddy current sensor or as a potentiometer. The optical marks can be bar codes, for example. The electrical signals from the encoder 27 are transmitted via associated connecting lines 32 (31) e.g. transmitted to the plugs 26 or other connections to the outside. The signals can then be connected to an electronic motor control that continuously monitors and adjusts the rotary position of the throttle body.

Claims (10)

  1. Idle speed stabilizer for controlling a throttle cross-section in a line, conducting combustion air, of an internal-combustion engine, having a collectorless pilot motor with a stator fixed in the housing and a rotatable rotor which is fixed to a shaft of a restrictor member which more or less opens a controlled opening, characterized in that the rotor (9) of the pilot motor (2) has a cup-shaped configuration with a base (16) and a wall (17) in the shape of a cylinder envelope, and the stator (7) is arranged with its field windings (8) inside the rotor (9), the stator (7) being fixed only at one end with the aid of the end of its axis (20) which is opposite the base (16) of the cup-shaped rotor (9) to a housing cap (22).
  2. Idle speed stabilizer according to Claim 1, characterized in that the rotor (9) carries permanent magnet segments (10) on the inside of its wall (17) in the shape of a cylinder envelope.
  3. Idle speed stabilizer according to Claim 1 or 2, characterized in that the cup-shaped rotor (9) is connected centrally to a shaft (11) to which the restrictor member (3) of the stabilizer (1) is also fixed.
  4. Idle speed stabilizer according to one of the preceding claims, characterized in that a sensor (27) for determining the rotary position of the shaft (11), and thus of the restrictor member (3), is arranged opposite the rotor (9) or the shaft (11) thereof.
  5. Idle speed stabilizer according to one of the preceding claims, characterized in that the sensor (27) is arranged opposite the end (28), averted from the rotor (9), of the shaft (11) in the housing (12).
  6. Idle speed stabilizer according to one of the preceding claims, characterized in that the sensor (27) is arranged opposite the free edge (29) of the cup-shaped rotor (9) on the housing cap (22).
  7. Idle speed stabilizer according to one of the preceding claims, characterized in that the sensor (27) is arranged opposite the wall (17), in the shape of a cylinder envelope, of the rotor (9) on the housing cap (22).
  8. Idle speed stabilizer according to one of the preceding claims, characterized in that the sensor (27) scans optical or magnetic marks (30) on the rotor (9) or the shaft (11).
  9. Idle speed stabilizer according to one of the preceding claims, characterized in that the sensor (27) scans mechanical or electrically active marks (30) on the rotor (9) or the shaft (11).
  10. Idle speed stabilizer according to one of the preceding claims, characterized in that for the purpose of determining the rotary position of the shaft (11), the sensor (27) consists of a potentiometer.
EP90911413A 1989-08-16 1990-08-03 Idle running rotary actuator Expired - Lifetime EP0487554B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3926910A DE3926910A1 (en) 1989-08-16 1989-08-16 IDLE TURNTABLE
DE3926910 1989-08-16
PCT/DE1990/000593 WO1991002893A1 (en) 1989-08-16 1990-08-03 Idle running rotary actuator

Publications (2)

Publication Number Publication Date
EP0487554A1 EP0487554A1 (en) 1992-06-03
EP0487554B1 true EP0487554B1 (en) 1994-04-20

Family

ID=6387150

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90911413A Expired - Lifetime EP0487554B1 (en) 1989-08-16 1990-08-03 Idle running rotary actuator

Country Status (11)

Country Link
US (1) US5239961A (en)
EP (1) EP0487554B1 (en)
JP (1) JPH05500094A (en)
KR (1) KR0167355B1 (en)
AU (1) AU639247B2 (en)
BR (1) BR9007596A (en)
CS (1) CS356790A2 (en)
DE (2) DE3926910A1 (en)
ES (1) ES2052264T3 (en)
RU (1) RU2070647C1 (en)
WO (1) WO1991002893A1 (en)

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DE4227951A1 (en) * 1992-08-22 1994-02-24 Bayerische Motoren Werke Ag Turntable
US5551481A (en) * 1994-01-27 1996-09-03 Hr Textron Inc. Method of manufacturing direct drive servovalve and direct drive servovalve resulting therefrom
US5505684A (en) * 1994-08-10 1996-04-09 Piramoon Technologies, Inc. Centrifuge construction having central stator
EP0810361B1 (en) * 1994-12-26 2010-04-28 Hitachi, Ltd. Flow rate controller of internal combustion engine
US5647321A (en) * 1995-02-24 1997-07-15 Unisia Jecs Corporation Actuating apparatus applicable to actuation of valve used for controlling engine idling revolution
US6176208B1 (en) * 1997-07-03 2001-01-23 Nippon Soken, Inc. Electromagnetic valve driving apparatus
US6433448B1 (en) * 1998-11-17 2002-08-13 Eaton Corporation Integrated torque motor and throttle body
EP1002943A3 (en) * 1998-11-17 2000-08-09 Eaton Corporation Improved integrated torque motor and throttle body
KR100342347B1 (en) * 1999-09-04 2002-07-04 윤장진 Rotary type idle speed actuator
US7191641B2 (en) * 2002-10-24 2007-03-20 Ford Global Technologies, Llc Rotary position sensing assembly for internal combustion engine
JP4459154B2 (en) * 2005-11-09 2010-04-28 株式会社ケーヒン Air bypass device for multiple throttle bodies
JP5249634B2 (en) * 2008-05-29 2013-07-31 株式会社不二工機 Flow control valve
DE102008031317A1 (en) * 2008-07-02 2010-01-07 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Compressor system with limited intake boost pressure
US9657656B2 (en) * 2014-08-27 2017-05-23 Continental Automotive Systems, Inc. Idle air control valve for use in a small engine and having a protective shroud with valve seat
DE102017101282A1 (en) * 2017-01-24 2018-07-26 Pierburg Gmbh ROTARY VALVE
EP3953619A1 (en) * 2019-04-10 2022-02-16 Pierburg GmbH Rotary slide valve for a motor vehicle
EP3953620B1 (en) * 2019-04-10 2024-04-03 Pierburg GmbH Rotary slide valve for a motor vehicle
CN112412565B (en) * 2020-12-08 2022-06-07 陈谦 Air throttle that drum-type admitted air

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DE8805211U1 (en) * 1988-04-20 1989-08-17 Robert Bosch Gmbh, 7000 Stuttgart, De

Also Published As

Publication number Publication date
CS356790A2 (en) 1991-12-17
AU6044690A (en) 1991-04-03
EP0487554A1 (en) 1992-06-03
KR920703987A (en) 1992-12-18
ES2052264T3 (en) 1994-07-01
RU2070647C1 (en) 1996-12-20
KR0167355B1 (en) 1998-12-15
DE3926910A1 (en) 1991-02-21
WO1991002893A1 (en) 1991-03-07
AU639247B2 (en) 1993-07-22
DE59005472D1 (en) 1994-05-26
US5239961A (en) 1993-08-31
JPH05500094A (en) 1993-01-14
BR9007596A (en) 1992-06-30

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