EP0379632A1 - Dispositif de dosage pour un moteur à combustion - Google Patents

Dispositif de dosage pour un moteur à combustion Download PDF

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Publication number
EP0379632A1
EP0379632A1 EP89110081A EP89110081A EP0379632A1 EP 0379632 A1 EP0379632 A1 EP 0379632A1 EP 89110081 A EP89110081 A EP 89110081A EP 89110081 A EP89110081 A EP 89110081A EP 0379632 A1 EP0379632 A1 EP 0379632A1
Authority
EP
European Patent Office
Prior art keywords
valve
throttle
metering device
throttle valve
combustion engine
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Withdrawn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
EP89110081A
Other languages
German (de)
English (en)
Inventor
Arnold Mann
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO 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 Mannesmann VDO AG filed Critical Mannesmann VDO AG
Publication of EP0379632A1 publication Critical patent/EP0379632A1/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Withdrawn legal-status Critical Current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
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1005—Details of the flap
    • F02D9/102—Details of the flap the flap having movable parts fixed onto it
    • 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
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/08—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically
    • F02M1/14—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically dependent on pressure in combustion-air- or fuel-air-mixture intake
    • 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
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • 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
    • F02M3/08—Other details of idling devices
    • F02M3/14—Location of idling system outlet relative to throttle valve

Definitions

  • these idle speed control devices are required to reset the throttle valve or the idle control valve in the direction of the minimum passage cross-section if the control fails.
  • this passage cross section can be too small for idle operation, for example, when the internal combustion engine has not yet warmed up, so that the engine stops at idle. It has therefore been further proposed, in this case, the throttle valve angle of attack to a fixed value which, under most operating conditions, guarantees the smooth running of the internal combustion engine at idle and thus enables emergency operation.
  • the actuating device has a pneumatic servomotor which is controlled by the negative pressure in the intake pipe downstream of the throttle valve and which acts via a spring element on the actuating linkage for the throttle valve and represents the idling stop. If there is no pressure difference, that is to say when the internal combustion engine is at a standstill, the throttle valve is brought into the start position by a built-in additional spring, and the otherwise necessary actuation of the accelerator pedal when starting the warm-up internal combustion engine is avoided.
  • a disadvantage of the known actuating device is the additional design effort which, in addition to the electronic controller, is necessary to achieve the desired purpose.
  • the automatically acting valve can be designed in a simple manner as a check valve which is arranged on the upstream side of the throttle valve in such a way that it is closed under the influence of the flowing air.
  • a particularly simple configuration results when the check valve is arranged as a tongue valve on the upstream side of the throttle valve.
  • the tongue can advantageously correspond to the bending line of a beam clamped on one side with an evenly distributed load, so that the tongue lies flat on the throttle valve wing under the influence.
  • this temperature-dependent element is designed as a bimetal strip fastened on one side, which is arranged on the downstream side of the baffle plate.
  • the throttle valve 3 is fastened on the throttle valve shaft 2 in a partially illustrated throttle valve connector 1.
  • the throttle valve shaft 2 is rotatably mounted on both sides in the throttle valve neck 1 in a known manner.
  • the throttle valve shaft 2 and thus the throttle valve 3 attached to it are moved in a known manner by an actuator connected to a control circuit in order to adapt the throttle valve gap 5 to the air requirement of the internal combustion engine.
  • the poppet valve 7 consists of a shaft 9 which is guided in a central bore 8 and which is connected to its upstream end centrally carries a valve plate 10.
  • a coil spring 11 keeps the poppet valve 7 open, with a stop 12 located downstream limiting the opening path of the poppet valve 7.
  • the poppet valve 7 is open when the internal combustion engine is stopped, i.e. that is, the bores 6 are released from the valve plate 10, as shown in FIG.
  • the throttle valve gap 5 thus represents an air passage cross section which generally enables the idling of an internal combustion engine once started.
  • the amount of starting air in particular an internal combustion engine that is at operating temperature, deviates considerably from the amount of intake air that is required for maintaining idling.
  • This additionally required amount of air can flow through the holes 6 in the device according to the invention until the internal combustion engine has ignited and whose air requirement results in the formation of a pressure difference between the upstream and the downstream side of the throttle valve 3.
  • the characteristic curve of the spiral spring 11 of the poppet valve 7 is now chosen so that the poppet valve closes under the action of the said pressure difference and thus the predetermined amount of idle air flows only through the throttle valve gap 5.
  • the embodiment according to FIG. 2 differs only in structure, but not in the mode of operation from that in FIG Figure 1 shown device. The same parts with the same effect are therefore provided with the same reference numerals.
  • the throttle valve 3 shown in FIG. 2 has only one opening 26 in a wing for the passage of the additional starting air quantity.
  • the valve element is designed as a tongue spring 27 which is designed as an elongated plate made of a spring-hard material and is fixedly connected to the throttle valve 3 at a certain distance from the passage opening 26 by a rivet 28.
  • the tongue spring 27 is pre-bent in such a way that the free end is at a predetermined distance from the surface of the throttle valve 3 on the upstream side.
  • the shape in the longitudinal section expediently follows the bending line of a beam clamped on one side with an evenly distributed load.
  • the amount of additional air flows around the tongue spring 27 and supplements the intake air flowing through the throttle valve gap 5 when the internal combustion engine starts.
  • the tongue spring is pressed against the surface of the throttle valve 3 and thereby closes the opening 26. This state remains in any case during the idling situation and for a partial load range .

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)
EP89110081A 1989-01-19 1989-06-03 Dispositif de dosage pour un moteur à combustion Withdrawn EP0379632A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893901418 DE3901418A1 (de) 1989-01-19 1989-01-19 Zumesseinrichtung fuer eine brennkraftmaschine
DE3901418 1989-01-19

Publications (1)

Publication Number Publication Date
EP0379632A1 true EP0379632A1 (fr) 1990-08-01

Family

ID=6372353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89110081A Withdrawn EP0379632A1 (fr) 1989-01-19 1989-06-03 Dispositif de dosage pour un moteur à combustion

Country Status (2)

Country Link
EP (1) EP0379632A1 (fr)
DE (1) DE3901418A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE467838B (sv) * 1991-01-29 1992-09-21 Electrolux Ab Automatisk choke
DE19502669C2 (de) * 1994-04-21 1998-01-15 Mannesmann Ag Einrichtung zur Mengenregelung von Verbrennungsluft
RU2115818C1 (ru) * 1996-11-18 1998-07-20 Акционерное общество "АвтоВАЗ" Впускное устройство для двигателя внутреннего сгорания
DE10224383A1 (de) * 2002-06-01 2003-12-18 Braun Gmbh Drosselventil für intermittierende Kompressionsvorrichtungen für menschliche Extremitäten

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2102846A (en) * 1933-01-25 1937-12-21 Bendix Aviat Corp Carburetor
US2337311A (en) * 1941-06-27 1943-12-21 Condosta Albert Lee Fuel saving device for internal combustion engines
GB2005770A (en) * 1977-09-30 1979-04-25 Bendix Corp Apparatus for providing additional air to aid starting of internal combustion engines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2102846A (en) * 1933-01-25 1937-12-21 Bendix Aviat Corp Carburetor
US2337311A (en) * 1941-06-27 1943-12-21 Condosta Albert Lee Fuel saving device for internal combustion engines
GB2005770A (en) * 1977-09-30 1979-04-25 Bendix Corp Apparatus for providing additional air to aid starting of internal combustion engines

Also Published As

Publication number Publication date
DE3901418A1 (de) 1990-07-26

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