EP0745761A2 - Dispositif d'étranglement pour moteurs à combustion - Google Patents

Dispositif d'étranglement pour moteurs à combustion Download PDF

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Publication number
EP0745761A2
EP0745761A2 EP96104575A EP96104575A EP0745761A2 EP 0745761 A2 EP0745761 A2 EP 0745761A2 EP 96104575 A EP96104575 A EP 96104575A EP 96104575 A EP96104575 A EP 96104575A EP 0745761 A2 EP0745761 A2 EP 0745761A2
Authority
EP
European Patent Office
Prior art keywords
throttle
cross
throttle device
section
piston
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.)
Withdrawn
Application number
EP96104575A
Other languages
German (de)
English (en)
Other versions
EP0745761A3 (fr
Inventor
H.-Juergen Jandrey
Gerhard Dipl.-Ing. Schellenberg
Kurt Dipl.-Ing. Brenner
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.)
Robert Bosch GmbH
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 EP0745761A2 publication Critical patent/EP0745761A2/fr
Publication of EP0745761A3 publication Critical patent/EP0745761A3/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a throttle device for internal combustion engines according to the preamble of claim 1.
  • Known throttle devices for internal combustion engines comprise a disk-shaped throttle valve which is rotatably mounted in the interior of an intake manifold.
  • the axis of rotation of the throttle valve passes through the tube wall of the intake manifold and is provided with an actuating lever outside the intake manifold.
  • this actuating lever is moved via a throttle cable, possibly with the interposition of a cam disc, and is usually returned to its starting position by means of a return spring.
  • the effective suction cross-section is varied by turning the throttle valve inside the intake manifold.
  • the throttle valve can assume any positions between its closed position, in which the suction cross section is essentially closed, and its maximum position, in which the throttle valve lies parallel to the direction of flow or to the axis of the intake manifold.
  • a bypass line is provided to adjust the engine idling, which connects the two intake pipe sections in front of and behind the throttle valve (with respect to the direction of flow).
  • This bypass line has a smaller cross section, which is adapted to the throughput required for an idle operation.
  • Some throttling devices only have such a bypass without further adjusting devices.
  • further developed designs have additional idle actuators in the bypass line, with which the throughput through the idle line can be adjusted in a finely adjustable manner.
  • the object of the invention is to propose a throttle device which does not require a separate idle actuator and no bypass line.
  • control means for controlling the effective intake cross section of the intake pipe of a throttle device include the setting means for idling, which were previously available separately in a bypass line.
  • Such a design of a throttle device eliminates the need for a separate idle actuator according to the described prior art.
  • the adjustment means for a fine adjustment of the idle intake cross section are advantageously designed to be adjustable. As a result, larger manufacturing tolerances of the adjusting means are possible, since the effective idling intake cross-section can be adjusted in fine adjustment for optimal idling operation by the adjustable configuration of the adjusting means during operation.
  • control means for the effective intake cross section of the intake pipe have a movable throttle piston.
  • a throttle piston that has a significantly larger volume than a disk-shaped throttle valve it is more possible to integrate adjusting means for idling.
  • the intake manifold of a throttle device advantageously has a cross-sectional taper, the throttle piston being axially displaceably mounted in the intake manifold in the region of the larger cross-section and the cross-sectional taper forming a sealing seat when the throttle piston is in contact.
  • the flow direction in the region of the throttle piston is essentially maintained by such a configuration of the throttle device. Air flowing through is only displaced outwards at the piston and can continue to flow there between the outside of the throttle piston and the inside wall of the intake manifold. Between the To a certain extent, there is a flow channel on the outer wall of the throttle piston and the inner wall of the intake manifold, as a result of which the flow conditions are improved in relation to a transverse throttle valve.
  • the flow conditions can be further improved in that the cross-sectional taper has a continuous course.
  • the shape of the throttle piston can be adapted to this, if necessary, so that intake air drawn in in the axial direction is gradually passed around the throttle piston.
  • the throttle piston is preferably mechanically displaced via an actuating device passing through the intake manifold wall.
  • This has the advantage that the handling of the throttle device according to the invention can be carried out in the previously known manner, for. B. by means of a Bowden cable, a cam, etc.
  • the return to the starting position can be done outside the intake manifold by suitable return elements, eg. B. return springs are performed.
  • the actuating device comprises a shaft passing through the tube wall, to which an actuating lever is attached in the interior of the suction tube.
  • the parts passing through the tube wall ie in the present case the shaft, perform a pure rotary movement, which simplifies the sealing of the shaft from the tube wall.
  • the lever in the interior of the intake manifold is fork-shaped in order to act over a larger area on the rear of the throttle piston. This is particularly advantageous if the throttle piston does not have a closed rear side.
  • a one-sided action of an actuating lever could lead to tilting of the throttle piston, which is avoided here.
  • a preferred embodiment in order to integrate the idle adjustment means in the throttle piston consists in assembling the throttle piston from at least two parts, a base body and a throttle head.
  • the throttle head is movably mounted on the base body.
  • the throttle head also be provided on the base body so as to be movable in the axial direction.
  • the width of a narrow annular gap between the throttle head and the sealing seat of the mentioned tapering of the intake manifold cross section can be adjusted for the idle position.
  • the throttle head is advantageously displaced via a spindle inside the throttle piston. High precision for fine adjustment can be achieved via a spindle.
  • the throttle head is preferably provided with a soft or semi-soft surface, so that it can also seal the intake pipe completely tightly.
  • a throttle device according to the invention with controllable fine adjustment of the idle intake cross section can be made at least partially from plastic with larger tolerances and thus also inexpensively. In addition to the cost savings, this also results in significant weight savings.
  • a throttle piston 6 is located inside the intake manifold section 5 with a larger cross section.
  • the throttle piston 6 has a base body 7 and a throttle head 8.
  • the throttle head 8 is provided with a semi-hard cover layer 9.
  • the throttle head 8 is provided in its front inner region with a thread 10 which meshes with a spindle 11.
  • the spindle 11 is seated on an axis 12 of a stepping motor 13 which is fastened inside the base body 7.
  • a flexible line 14 is led out of the intake pipe 2 by the engine through a bushing 15.
  • An elongated hole 16 is penetrated by a fork 17, which serves as a lever. At the other end, the fork 17 is attached to a shaft 18.
  • Fig. 2 the guidance of the throttle piston 6 in radially outwardly leading ribs 19 can be seen.
  • the stepping motor 13 can again be seen in the interior of the throttle piston 6.
  • the throttle piston 6 can be operated via the fork 17 and the shaft 18 like a conventional throttle valve and also fulfills its function.
  • the shaft 18 can be actuated, for example, via a Bowden cable, the throttle piston 6 being able to be moved back and forth in the direction of the double arrow P. Intake air can flow past the throttle piston 6 in the direction of the arrows L. The more the throttle piston 6 moves into the taper 3, the narrower the annular gap 20, which represents the passage channel in the area of the taper.
  • the throttle piston with its throttle piston 9 sits completely on the sealing seat 4 of the taper 3 and thus completely closes the intake manifold 2.
  • the annular gap 20 must be fine-tuned with a very narrow gap for optimal engine operation. This is done by a corresponding displacement of the sealing head 8 with respect to the sealing piston 6 also in the axial direction (double arrow P). Via the thread 10, the spindle 11 and the stepper motor 13 there is a possibility to regulate the sealing head very precisely and thus to precisely set the effective idle cross section of the suction pipe 2.
  • a throttle device according to the invention no longer requires a separate idle actuator.
  • the manufacturing tolerances can also be chosen larger due to the possibility of fine adjustment by means of the displaceable throttle head 8, which in particular enables a plastic design.

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)
EP96104575A 1995-06-02 1996-03-22 Dispositif d'étranglement pour moteurs à combustion Withdrawn EP0745761A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995120301 DE19520301A1 (de) 1995-06-02 1995-06-02 Drosselvorrichtung für Brennkraftmotoren
DE19520301 1995-06-02

Publications (2)

Publication Number Publication Date
EP0745761A2 true EP0745761A2 (fr) 1996-12-04
EP0745761A3 EP0745761A3 (fr) 1997-08-13

Family

ID=7763538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96104575A Withdrawn EP0745761A3 (fr) 1995-06-02 1996-03-22 Dispositif d'étranglement pour moteurs à combustion

Country Status (2)

Country Link
EP (1) EP0745761A3 (fr)
DE (1) DE19520301A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1267067A1 (fr) * 2001-06-13 2002-12-18 Bayerische Motoren Werke Aktiengesellschaft Dispositif de préparation du mélange pour un moteur à combustion interne
EP1696114A1 (fr) * 2005-01-21 2006-08-30 HONDA MOTOR CO., Ltd. Dispositif de commande de débit d'air pour un moteur à combustion interne
WO2013171213A1 (fr) * 2012-05-14 2013-11-21 Lorenz Bauer Élément d'aspiration pour un moteur à combustion interne

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013208910B4 (de) * 2013-05-14 2018-02-01 Lorenz Bauer Ansaugelement für einen Verbrennungsmotor

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR730437A (fr) * 1932-01-25 1932-08-12 Perfectionnement aux carburateurs
FR753607A (fr) * 1933-04-03 1933-10-20 Carburateur
FR2339063A1 (fr) * 1976-01-24 1977-08-19 Bosch Gmbh Robert Soupape a by-pass pour commander la quantite de melange pour la marche a chaud et la marche au ralenti d'un moteur automobile
US4088715A (en) * 1977-01-03 1978-05-09 Graybill Clinton Variable venturi carburetor
DE3012832A1 (de) * 1980-03-25 1981-11-19 Eugen 6600 Saarbrücken Nier Mantelstromvergaser
DE3643882A1 (de) * 1986-12-22 1988-06-30 Vdo Schindling Kraftstoff-luft-gemischaufbereitungsvorrichtung fuer verbrennungsmotoren
US4779590A (en) * 1987-02-06 1988-10-25 Eaton Corporation Engine throttle control with low idle speed actuation force
WO1989002981A1 (fr) * 1987-10-02 1989-04-06 Siemens Aktiengesellschaft Dispositif d'etranglement
GB2245658A (en) * 1990-07-07 1992-01-08 Henry James Tizzard I.C. Engine carburettor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3626681A1 (de) * 1986-06-26 1988-01-14 Arne Dipl Ing Walde Vorrichtung zur steuerung der luft- und/oder kraftstoffmenge in verbrennungskraftmaschinen
DE3828686A1 (de) * 1987-09-03 1989-03-23 Volkswagen Ag Leistungsstellglied fuer eine brennkraftmaschine mit einem schieber
DE3939508A1 (de) * 1989-08-12 1991-02-14 Arne Dipl Ing Walde Vorrichtung zur steuerung der luft- und/oder kraftstoffmenge in verbrennungskraftmaschinen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR730437A (fr) * 1932-01-25 1932-08-12 Perfectionnement aux carburateurs
FR753607A (fr) * 1933-04-03 1933-10-20 Carburateur
FR2339063A1 (fr) * 1976-01-24 1977-08-19 Bosch Gmbh Robert Soupape a by-pass pour commander la quantite de melange pour la marche a chaud et la marche au ralenti d'un moteur automobile
US4088715A (en) * 1977-01-03 1978-05-09 Graybill Clinton Variable venturi carburetor
DE3012832A1 (de) * 1980-03-25 1981-11-19 Eugen 6600 Saarbrücken Nier Mantelstromvergaser
DE3643882A1 (de) * 1986-12-22 1988-06-30 Vdo Schindling Kraftstoff-luft-gemischaufbereitungsvorrichtung fuer verbrennungsmotoren
US4779590A (en) * 1987-02-06 1988-10-25 Eaton Corporation Engine throttle control with low idle speed actuation force
WO1989002981A1 (fr) * 1987-10-02 1989-04-06 Siemens Aktiengesellschaft Dispositif d'etranglement
GB2245658A (en) * 1990-07-07 1992-01-08 Henry James Tizzard I.C. Engine carburettor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1267067A1 (fr) * 2001-06-13 2002-12-18 Bayerische Motoren Werke Aktiengesellschaft Dispositif de préparation du mélange pour un moteur à combustion interne
DE10128785A1 (de) * 2001-06-13 2002-12-19 Bayerische Motoren Werke Ag Gemischaufbereitungsvorrichtung für einen Verbrennungsmotor
EP1696114A1 (fr) * 2005-01-21 2006-08-30 HONDA MOTOR CO., Ltd. Dispositif de commande de débit d'air pour un moteur à combustion interne
WO2013171213A1 (fr) * 2012-05-14 2013-11-21 Lorenz Bauer Élément d'aspiration pour un moteur à combustion interne

Also Published As

Publication number Publication date
DE19520301A1 (de) 1996-12-05
EP0745761A3 (fr) 1997-08-13

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