EP0263368B1 - Dispositif de commande de l'air de ralenti pour moteurs à combustion interne - Google Patents

Dispositif de commande de l'air de ralenti pour moteurs à combustion interne Download PDF

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Publication number
EP0263368B1
EP0263368B1 EP19870114004 EP87114004A EP0263368B1 EP 0263368 B1 EP0263368 B1 EP 0263368B1 EP 19870114004 EP19870114004 EP 19870114004 EP 87114004 A EP87114004 A EP 87114004A EP 0263368 B1 EP0263368 B1 EP 0263368B1
Authority
EP
European Patent Office
Prior art keywords
disc
housing
chamber
rotary slide
slide 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.)
Expired - Lifetime
Application number
EP19870114004
Other languages
German (de)
English (en)
Other versions
EP0263368A2 (fr
EP0263368A3 (en
Inventor
Heinz Lemberger
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0263368A2 publication Critical patent/EP0263368A2/fr
Publication of EP0263368A3 publication Critical patent/EP0263368A3/de
Application granted granted Critical
Publication of EP0263368B1 publication Critical patent/EP0263368B1/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
    • 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 relates to a device 'according to the type specified in the preamble of the main claim.
  • a device of this type is known, for example, from DE-A 3 337 590 and serves to regulate the idle air that is bypassed past a power control element of the internal combustion engine.
  • the idle air flowing past the control edge of the rotary valve causes oil and water-containing deposits on the surfaces facing the chamber of the rotary valve, which form condensates at low ambient temperatures.
  • the rotary valve is formed by means of a tongue-like cylinder section arranged on the outer circumference of the disk which directs the regulated idle air to the outflow connection, the disk being arranged in the housing with circumferential play.
  • This disc arranged with circumferential play essentially forms the separation between a part receiving the rotary slide valve and a part of the chamber of the housing receiving the stepping motor.
  • the invention has for its object to improve the operational safety of the device described in the preamble of the main claim with simple means.
  • the condensate barrier is implemented by means of a drum which is rotatably arranged in the housing of the device and which is designed on one end face as a flat rotary slide valve for regulating the inflowing idle air.
  • the idle air flows into the drum in the axial direction, the flow processes causing the deposits of the idle air flowing into the interior of the drum being triggered at the control edge facing the interior of the drum.
  • oil and water-containing constituents which have been eliminated from the idle air are deposited on the inside of the drum. Annoying deposits between the front wall of the chamber and the rotary valve are avoided.
  • the drum forms a condensate barrier which is movable relative to the housing and which reliably prevents the penetration of oil and water-containing condensates to the electrical drive part of the device. Furthermore, since the interior of the drum is acted upon by the negative pressure on the motor side, discharge of the condensate is also ensured.
  • the drum can be either made of plastic or coated on the inside with plastic in a further embodiment of the invention. Furthermore, the risk of icing in the air gap arranged between the end wall of the chamber and the flat rotary slide valve is substantially reduced in that this air gap is sucked empty by the negative pressure of the internal combustion engine over a relatively large circumferential gap. The amount of leakage air through this air gap can advantageously be determined by a labyrinth seal between the flat rotary valve and the end wall of the chamber.
  • the drum combining the flat rotary valve with the condensate barrier is dimensionally stable even at relatively high ambient temperatures, the air gap and the labyrinth seal can advantageously be coordinated with one another. A lower radial bearing load is also achieved with the axially flowing idle air. Finally, the installation position of the device according to the invention can be as desired.
  • this can be arranged fixed to the housing according to another construction principle of the invention, with a ring which is adjacent to the motor-side end face of the disc and is in contact with the housing in the region of the annular gap predetermined between the disc and the housing by the circumferential play.
  • a housing-fixed ring with a conical collar which can be elastically expanded to the respective diameter when a disc combined with a flat rotary slide valve is installed and limits a predetermined axial gap with the disc.
  • a condensate barrier fixed to the housing is for a conventional, the inflowing idle air formed by a circumferential opening of the chamber controlling rotary valve as a fixed ring which is arranged in a part of a divided housing.
  • a device 1 for regulating the idle air for an internal combustion engine comprises a housing 2 which can be arranged in an idle air line, not shown, with connecting pieces 3 and 4 oriented transversely to one another. Furthermore, the device 1, in a chamber 5 delimited by the housing 2, comprises an air-conducting connection between the connecting pieces 3 and 4 controlling rotary valve 6 and an electric stepper motor 7 in the same-axis drive connection.
  • the flat rotary slide valve 6 interacts with an opening 9 arranged in an end wall 8 of the chamber 5, the opening 9 being associated with the axially directed connecting piece 3.
  • the flat rotary slide valve 6 has a control opening 10, by means of which the idle air flowing in via the connecting piece 3 is regulated.
  • the control opening 10 can have a different cross-section depending on the desired characteristic curve or the characteristic curve adapted to the respective internal combustion engine.
  • the chamber 5 also has an opening 11 on the circumference, via which the regulated idle air flows into the radially directed connecting piece 4.
  • a disk 12 essentially dividing the chamber 5 is arranged in the drive connection between the flat rotary valve 6 and the stepping motor 7.
  • the disk 12 forms a drum 14 with the axially spaced flat rotary slide valve 6 via a cylindrical casing 13.
  • the drum 14 has a recess 15 in the casing 13 which corresponds to the circumferential opening 11 of the chamber 5. Condensates of oil, water and other foreign matter precipitating out of the idle air absorbs the drum 14, as a result of which it forms an effective condensate barrier towards the chamber part 5 'of the stepping motor 7.
  • the device I ' is characterized by a condensate lock arranged in a housing-fixed manner in the chamber 5 between the disk 12 and the stepper motor 7 in the chamber 5 from a ring 18 adjacent to the motor-side end face of the disk 12 6 for controlling the idle air flowing through an opening 9 in the end wall 8 of the chamber 5 in a coaxial drive connection.
  • the ring 18 fixed to the housing has a conical collar 19 directed towards the motor-side end face of the disk 12.
  • This collar 19 is made of an elastic material and its dimensions are such that it is elastic to the respective diameter of the flat rotary valve 6 and the disk 12 is expandable.
  • the collar 19 delimits a predetermined axial gap 20.
  • the housing-fixed arrangement of the ring 18 in the region of the annular gap 21 between the washer 12 and the housing 2 defined by the circumferential clearance with the housing 2 closes a liquid-tight connection of the ring 18 with the housing 2.
  • the idle air flows radially in and out. Parts identical to FIG. 1 are again given the same reference numerals.
  • the disk forms 12 with a tongue-like cylinder section 22 arranged on the outer circumference, a rotary valve 23 for radially flowing idling air.
  • a fixed ring 24 is arranged adjacent to the disk 12 of the rotary slide valve 23 without contact.
  • the fixed ring 24, which is arranged as a fixed condensate barrier, is arranged in part 25 'of a two-part housing 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Claims (7)

1. Dispositif de commande de l'air de ralenti pour moteur à combinaison interne, comprenant:
- un boîtier (2) pouvant être placé dans un conduit d'air de ralenti avec des ajutages (3, 4) ainsi que
- dans une chambre (5) délimitée par le boîtier un tiroir rotatif (6) commandant une liaison de guidage d'air entre les ajutages et un moteur électrique pas à pas (7) d'entraînement sur le même axe,
- l'air de ralenti étant commandé côté arrivée et,
- étant dirigé côté aval du tiroir rotatif vers l'ajutage de sortie de flux (4) au moyen d'un disque (12) divisant la chambre,
- le disque placé en entraînement étant disposé dans le boîtier avec un jeu périphérique, caractérisé en ce que:
- le disque (12) est un élément d'un tambour (14) muni d'ouverture d'entrée et de sortie de flux (ouverture de commande 10, évidement 15) et servant de barrage de condensat vis-à-vis de la partie de chambre (5') du moteur pas à pas (7).
2. Dispositif selon la revendication 1, caractérisé en ce que le disque (12) forme le tambour (14) avec un tiroir rotatif à disque (6) situé axialement à distance dans la chambre (5) et par l'intermédiaire d'une enveloppe cylindrique (13);
- en ce que le tambour est mis en place avec un jeu périphérique et comprend dans l'enveloppe un évidement (15) en correspondance de l'ouverture périphérique (11) de la chambre (5),
- en ce qu'en outre le tiroir rotatif à disque (6) est associé à une ouverture de commande (10) d'un passage (9) servant à l'air de ralenti arrivant axialement dans une paroi frontale (8) de la chambre (5), et il coopère de façon étanche avec la paroi frontale.
3. Dispositif selon la revendication 2, caractérisé en ce que le tambour (14) est en matière plastique ou est recouvert intérieurement de matière plastique.
4. Dispositif selon les revendications 1 à 3, caractérisé en ce que le tiroir rotatif à disque (6) coopère avec la paroi frontale (8) de façon étanche, sans contact, par l'intermédiaire de garnitures à labyrinthe (16, 17).
5. Dispositif de commande de l'air de ralenti pour des moteurs à combustion interne, comprenant:
- un boîtier (25) pouvant être placé dans un conduit d'air de ralenti avec des ajutages (3, 4) ainsi que
- dans une chambre (5) délimitée par le boîtier, un tiroir rotatif (6, 22) commandant une liaison de guidage d'air entre les ajustages et un moteur électrique pas à pas (7) en entraînement sur le même axe,
- l'air de ralenti étant commandé côté arrivée, et
- étant dirigé côté aval du tiroir rotatif vers l'ajutage de sortie de flux (4) au moyen d'un disque (12) divisant la chambre,
- le disque placé en entraînement étant disposé dans le boîtier avec un jeu périphérique, caractérisé:
- en ce que le disque (12) est un élément d'un barrage de condensat vis-à-vis de la partie de chambre (5') du moteur pas à pas (7) et le barrage de condensat comprend en plus un anneau (18, 24), solidaire de la chambre (5) voisin de la face frontale côté moteur du disque (12) mais sans le toucher,
- l'anneau (18, 24) étant relié au boîtier de façon étanche aux liquides dans la zone de l'intervalle annulaire (21) déterminé par le jeu périphérique entre le disque (12) et le boîtier (25).
6. Dispositif selon la revendication 5, caractérisé:
- en ce que le disque (12) se trouve en entraînement coaxial avec un tiroir rotatif à disque (6) situé à une certaine distance sur l'axe et destiné à régler l'air de ralenti arrivant par une ouverture (9) dans la paroi frontale (8) de la chambre (5) et,
- en ce que l'anneau (18) solidaire du boîtier porte une collerette conique (19), en direction du disque (12),
- en ce que l'anneau (18) peut être élargi, pendant le montage des tiroirs rotatifs (6) et disque (12), de manière élastique à leurs diamètres respectifs, et
- en ce que l'anneau (18) délimite avec le disque (12) un intervalle (20) axial prédéterminé.
7. Dispositif selon la revendication 5, caractérisé:
- en ce que le boîtier (25) est réalisé en deux pièces, le disque (12) constituant au moyen d'un segment cylindrique (22), en forme de langue, placé sur le pourtour extérieur un tiroir rotatif (23) pour l'arrivée radiale de l'air de ralenti, et
- en ce que l'anneau fixe (24) est placé dans une des parties du boîtier (25').
EP19870114004 1986-09-30 1987-09-25 Dispositif de commande de l'air de ralenti pour moteurs à combustion interne Expired - Lifetime EP0263368B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3633260 1986-09-30
DE19863633260 DE3633260A1 (de) 1986-09-30 1986-09-30 Steuervorrichtung zur regelung der leerlaufluft fuer brennkraftmaschinen

Publications (3)

Publication Number Publication Date
EP0263368A2 EP0263368A2 (fr) 1988-04-13
EP0263368A3 EP0263368A3 (en) 1989-05-17
EP0263368B1 true EP0263368B1 (fr) 1990-12-27

Family

ID=6310717

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870114004 Expired - Lifetime EP0263368B1 (fr) 1986-09-30 1987-09-25 Dispositif de commande de l'air de ralenti pour moteurs à combustion interne

Country Status (3)

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EP (1) EP0263368B1 (fr)
DE (2) DE3633260A1 (fr)
ES (1) ES2022853B3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3909396A1 (de) * 1989-03-22 1990-10-04 Bayerische Motoren Werke Ag Vorrichtung zur bemessung der leerlaufluft von brennkraftmaschinen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3001473A1 (de) * 1980-01-17 1981-07-23 Robert Bosch Gmbh, 7000 Stuttgart Stelleinrichtung zur drehwinkeleinstellung
DE3019167A1 (de) * 1980-05-20 1981-11-26 Robert Bosch Gmbh, 7000 Stuttgart Stelleinrichtung zur steuerung eines durchflussquerschnitts
DE3234468A1 (de) * 1982-09-17 1984-03-22 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und vorrichtung zur steuerung mindestens eines drosselquerschnittes in einer steuerleitung
DE3242043A1 (de) * 1982-11-13 1984-05-17 Vdo Adolf Schindling Ag, 6000 Frankfurt Elektrische anordnung zur regelung der leerlaufdrehzahl eines verbrennungskraftstoffmotors
DE3337590A1 (de) * 1983-10-15 1985-04-25 Robert Bosch Gmbh, 7000 Stuttgart Elektrischer stellmotor
DE3340060A1 (de) * 1983-11-05 1984-12-20 Daimler-Benz Ag, 7000 Stuttgart Vorrichtung zur regelung des leerlaufs einer gemischverdichtenden brennkraftmaschine

Also Published As

Publication number Publication date
ES2022853B3 (es) 1991-12-16
DE3633260C2 (fr) 1988-10-13
EP0263368A2 (fr) 1988-04-13
DE3633260A1 (de) 1988-04-07
DE3767110D1 (de) 1991-02-07
EP0263368A3 (en) 1989-05-17

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