EP0498933B1 - Drosselklappe - Google Patents

Drosselklappe Download PDF

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Publication number
EP0498933B1
EP0498933B1 EP91119213A EP91119213A EP0498933B1 EP 0498933 B1 EP0498933 B1 EP 0498933B1 EP 91119213 A EP91119213 A EP 91119213A EP 91119213 A EP91119213 A EP 91119213A EP 0498933 B1 EP0498933 B1 EP 0498933B1
Authority
EP
European Patent Office
Prior art keywords
throttle valve
throttle
wedge
valve
wing
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
EP91119213A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0498933A1 (de
Inventor
Karl Dpl.-Ing. Gmelin
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 EP0498933A1 publication Critical patent/EP0498933A1/de
Application granted granted Critical
Publication of EP0498933B1 publication Critical patent/EP0498933B1/de
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
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1005—Details of the flap
    • F02D9/101—Special flap shapes, ribs, bores or the like
    • F02D9/1015—Details of the edge of the flap, e.g. for lowering flow noise or improving flow sealing in closed flap position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium

Definitions

  • the invention relates to a throttle valve according to the preamble of the main claim.
  • a throttle valve is already known which has a wedge on its upper end facing the flow, which is arranged on the wing of the throttle valve, which is opposite the wall of the intake duct moved in the direction opposite to the flow.
  • the wedge is flattened in the direction of the throttle valve shaft and, in the closed position of the throttle valve, serves to cover the bypass holes of the idle system of a carburetor.
  • the wedge on the throttle valve wing moving in the direction opposite to the flow when the throttle valve is opened, however, no improvement in the meterability of the intake air or the intake air / fuel mixture is achieved by the throttle device consisting of intake duct and throttle valve.
  • the throttle device consisting of intake duct and throttle valve.
  • the wedge of the throttle valve also throttles the flow through the opening cross section of the throttle device in addition to the throttle valve shaft.
  • the device according to the invention with the characterizing features of the main claim has the advantage of making it possible to improve the meterability of the intake air or the intake air / fuel mixture by means of the throttle device consisting of throttle valve and intake duct, particularly in the lower load range of the internal combustion engine.
  • the wedge initially reduces the opening cross section of the throttle device, and thus the flow rate flowing through the throttle device, particularly in the lower load range of the internal combustion engine, that is to say when the throttle valve is only partially open. This then results in a very pronounced progressive increase in the amount of flow flowing through the opening cross section of the throttle device, e.g. of the fuel-gas mixture, achieved with increasing load of the internal combustion engine, without the need to actuate the throttle valve.
  • the wedge flattening from near the circumference of the throttle valve in the direction of the throttle valve shaft does not lead to any deterioration of the flow under full load, that is to say when the throttle valve is fully open, because in this case the wedge lies downstream and in the flow shadow of the throttle valve shaft and the flow thus is not throttled additionally.
  • the drainage channel formed in the end face of the wedge together with the drainage groove formed in the upper end face of the throttle valve, allows the fuel deposited on the wedge and the second throttle valve wing to drain when using the throttle valve downstream of a carburetor or a central fuel injector.
  • the straight edge of the wedge facing the throttle valve shaft can be used as a stop for fixing the position in the pre-assembly of the throttle valve.
  • the at least one drain groove of the throttle valve runs in alignment with the respective gutter of the wedge and is connected to it, and the at least one gutter and the respective one Extend the drain groove perpendicular to the throttle valve shaft of the throttle valve.
  • the throttle valve and the wedge are formed as a common part by die-casting from aluminum.
  • the throttle valve according to the invention can be produced in a very simple and inexpensive manner.
  • the wedge cannot come loose from the throttle valve.
  • FIG. 1 shows a first exemplary embodiment of a throttle valve according to the invention arranged in an intake duct of an internal combustion engine
  • FIG. 2 shows a view of the throttle valve according to the first exemplary embodiment in the direction of arrow X in FIG. 1
  • FIG. 3 shows a second exemplary embodiment of a throttle valve according to the invention arranged in an intake duct of an internal combustion engine
  • FIG. 4 shows a view of the throttle valve according to the second exemplary embodiment in the direction of the arrow Y in FIG. 3.
  • FIGS. 1 to 4 show two throttle valves according to the invention and their arrangement in an intake duct of a mixture-compression-ignition internal combustion engine, for example.
  • the same and equivalent parts are identified in the four figures with the same reference numerals.
  • 1 denotes a central fuel injector, which is held in a stepped receiving opening 2 of a carrier body 3.
  • another fuel metering device e.g. a carburetor may be provided.
  • the carrier body 3 is placed on a throttle valve connector 5, which has an intake duct 7.
  • a gas flow cross section 8 of the carrier body 3 serves to supply a gas, e.g. of intake air in the intake duct 7 of the internal combustion engine.
  • a throttle valve 9 is arranged, through which the cross section of the intake duct 7 can be controlled in a known manner, so that more or less intake air or fuel-gas mixture via the intake duct 7 in the direction of the arrows 11 Internal combustion engine can flow.
  • the fuel injection valve 1 has a mouthpiece 13 at its end projecting into the intake duct 7 of the throttle valve connector 5, via which mouthpiece 13 the fuel e.g. hollow cone-shaped in the direction of the throttle valve 9, and as far as possible in the open annular gap 14 formed between the intake duct 7 and the circumference of the throttle valve 9 is sprayable.
  • the throttle valve 9 is mounted in a known manner in a slot 15 of the slotted throttle valve shaft 19, the two shaft ends 21, 22 of which protrude beyond the circumference of the throttle valve 9 and which are concentric with a central axis 17 of the throttle valve.
  • Throttle valve shaft 19 and throttle valve 9 are connected to one another, for example, by means of two fastening screws 23, 24, which extend through the throttle valve 9 .
  • the throttle valve 9 has a first throttle valve wing 25 and a second throttle valve wing 27, which are separated from one another by the throttle valve shaft 19.
  • the first throttle valve wing 25 moves counterclockwise with respect to the wall of the intake duct 7 in the direction of the flow of the fuel-gas mixture
  • the second throttle valve wing 27 moves counter to the wall of the intake duct 7 when the throttle valve 9 is opened Direction of flow is moving.
  • the throttle valve 9 On an upper end face 29 of the throttle valve 9 facing the fuel injection valve 1, the throttle valve 9 has a wedge 31 which is arranged on the first throttle valve wing 25 of the throttle valve 9 which moves when the throttle valve 9 is opened in the direction of flow relative to the wall of the intake duct 7.
  • the wedge 31 is arranged, for example, on the upper end face 29 of the throttle valve 9 in such a way that it does not completely cover the first throttle valve wing 25, as a result of which both between the circumference of the throttle valve 9 and a curved edge 35 of the wedge 31 and between the throttle valve shaft 19 and the Wedge 31 a narrow edge region 33 is formed.
  • the edge 35 of the wedge 31 has its greatest extent in the direction perpendicular to the upper end face 29 of the throttle valve 9.
  • the edge 35 of the wedge 31 can, as in the two illustrated exemplary embodiments, be concavely curved outwards.
  • the wedge 31 is designed such that it flattens in the direction of the throttle valve shaft 19 up to the edge region 33 of the upper end face 29 of the first throttle valve wing 25.
  • the wedge 31 is used in the lower load range of the internal combustion engine, that is to say when the throttle valve 9 is only partially open, to reduce the opening cross section of the throttle device comprising the throttle valve 9 and the intake duct 7 and thus to reduce the flow rate flowing through the opening cross section of the throttle device.
  • the wedge 31 causes a very pronounced progressive increase in the amount of flow flowing through the opening cross section of the throttle device, i.e. e.g. of the fuel-gas mixture reached. A transmission control of the throttle valve 9 to achieve a more progressive behavior of the throttle device is therefore not necessary.
  • the wedge 31 When the throttle valve 9 is open, the wedge 31 is arranged so favorably in the opening cross section of the throttle device that the flow of the mixture is not hindered because the wedge 31 then lies downstream of the throttle valve shaft 19 in its slipstream and is streamlined.
  • the concavely curved edge 35 of the wedge 31 makes it possible to keep the increase in the opening cross section of the throttle device small when the throttle valve 9 opens, with a low load on the internal combustion engine, over a relatively large range of the throttle valve position.
  • At least one drain groove 39 is formed in the upper end face 29 of the throttle valve 9 and extends, for example, perpendicular to the central axis 17 of the throttle valve 9.
  • the drain groove 39 extends from the first throttle valve wing 25 through the slot 15 of the throttle valve shaft 19 into the second throttle valve wing 27.
  • At least one drainage channel 43 is formed in one end face 41 of the wedge 31 that is opposite the flow of the fuel-gas mixture proceeding from the edge 35 of the wedge 31 in the direction of the throttle valve shaft 19 and connected to the associated drain groove 39.
  • the throttle valve 9 each has a drain groove 39 in the two exemplary embodiments and the wedge 31 each has a drain groove 43.
  • the drain groove 39 and the drainage channel 43 run in alignment with one another along a transverse axis 45 running perpendicular to the central axis 17.
  • the throttle valve 9 has a plurality of drain grooves 39 and the wedge 31 has a plurality of drain grooves 43 and the number of drain grooves 39 does not correspond to the number of drain grooves 43.
  • a gutter 43 with several drain grooves 39 are connected.
  • the drainage channel 43 has a constant depth in the end face 41 of the wedge 31 over its entire length and does not extend to the upper end face 29 of the throttle valve 9.
  • the drainage channel 43 of the wedge 31 according to FIG. 3 and 4 extends continuously up to the upper end face 29 of the throttle valve 9.
  • the drainage channel 43 in the end face 41 of the wedge 31 and the drainage groove 39 in the upper end face 29 of the throttle valve 9 enable the fuel deposited on the wedge 31 and the second throttle valve wing 27 of the throttle valve 9 to flow off as the fuel-gas mixture flows past.
  • the throttle valve 9 and the wedge 31 are produced, for example, in the first exemplary embodiment as a common part by die-cast aluminum, and the circumference of the throttle valve 9 is reworked for the exact metering of the fuel-gas mixture.
  • the throttle valve 9 according to the invention can thus be produced in a very simple and inexpensive manner.
  • the wedge 31 is prevented from falling off. If the throttle valve 9 is used to measure the mixture or the gas, it is also necessary to rework the wedge 31 on the curved edge 35.
  • a straight edge 36 of the wedge 31 facing the throttle valve shaft 19 can be used as a stop for fixing the position in the preassembly of the throttle valve 9.
  • the throttle valve 9 with the wedge 31 designed according to the invention leads to better meterability of the intake air or the fuel-gas mixture by the throttle device in the lower load range of an internal combustion engine and enables the run-down of the one deposited on the wedge 31 and the second throttle valve wing 27 of the throttle valve 9 Fuel.

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)
  • Means For Warming Up And Starting Carburetors (AREA)
EP91119213A 1991-02-09 1991-11-12 Drosselklappe Expired - Lifetime EP0498933B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4104010A DE4104010A1 (de) 1991-02-09 1991-02-09 Drosselklappe
DE4104010 1991-02-09

Publications (2)

Publication Number Publication Date
EP0498933A1 EP0498933A1 (de) 1992-08-19
EP0498933B1 true EP0498933B1 (de) 1994-06-22

Family

ID=6424752

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119213A Expired - Lifetime EP0498933B1 (de) 1991-02-09 1991-11-12 Drosselklappe

Country Status (4)

Country Link
EP (1) EP0498933B1 (enrdf_load_stackoverflow)
JP (1) JPH07166899A (enrdf_load_stackoverflow)
DE (2) DE4104010A1 (enrdf_load_stackoverflow)
ES (1) ES2055955T3 (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4343091A1 (de) * 1993-12-17 1995-06-22 Bosch Gmbh Robert Drosselvorrichtung, insbesondere für eine Brennkraftmaschine, und Verfahren zum Herstellen einer Drosselvorrichtung
DE4401585C2 (de) * 1994-01-20 1998-10-29 Mann & Hummel Filter Drosseleinrichtung
RU2115818C1 (ru) * 1996-11-18 1998-07-20 Акционерное общество "АвтоВАЗ" Впускное устройство для двигателя внутреннего сгорания
DE19909982A1 (de) * 1999-03-06 2000-09-07 Bosch Gmbh Robert Drosselklappenstutzen zum Steuern der Leistung einer Brennkraftmaschine
GB0130086D0 (en) * 2001-12-17 2002-02-06 Delphi Tech Inc Flap valve for fluid flow passage
JP4739128B2 (ja) * 2006-06-28 2011-08-03 愛三工業株式会社 吸気制御弁

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB507977A (en) * 1938-07-15 1939-06-23 Alexander Abramson Improvements in or relating to down draught carburettors for internal combustion engines
US3176704A (en) * 1961-11-20 1965-04-06 Universal Oil Prod Co Carburetor throttle valve
JPS5918114Y2 (ja) * 1978-10-07 1984-05-25 日産自動車株式会社 内燃機関の空燃比制御装置

Also Published As

Publication number Publication date
JPH07166899A (ja) 1995-06-27
ES2055955T3 (es) 1994-09-01
DE4104010C2 (enrdf_load_stackoverflow) 1993-04-08
DE4104010A1 (de) 1992-08-13
EP0498933A1 (de) 1992-08-19
DE59102018D1 (de) 1994-07-28

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