EP0025866A1 - Installation d'injection continue d'essence dans le système d'admission pour moteurs à combustion interne à quatre-temps, à compression du mélange et à allumage commandé - Google Patents

Installation d'injection continue d'essence dans le système d'admission pour moteurs à combustion interne à quatre-temps, à compression du mélange et à allumage commandé Download PDF

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Publication number
EP0025866A1
EP0025866A1 EP80104868A EP80104868A EP0025866A1 EP 0025866 A1 EP0025866 A1 EP 0025866A1 EP 80104868 A EP80104868 A EP 80104868A EP 80104868 A EP80104868 A EP 80104868A EP 0025866 A1 EP0025866 A1 EP 0025866A1
Authority
EP
European Patent Office
Prior art keywords
fuel
intake
manifold
receiving part
injection system
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Withdrawn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
EP80104868A
Other languages
German (de)
English (en)
Inventor
Heinz Dipl.-Ing. Dorsch
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0025866A1 publication Critical patent/EP0025866A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
    • F02M69/32—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines with an air by-pass around the air throttle valve or with an auxiliary air passage, e.g. with a variably controlled valve therein
    • F02M69/325—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines with an air by-pass around the air throttle valve or with an auxiliary air passage, e.g. with a variably controlled valve therein with an auxiliary injection nozzle therein
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
    • F02M69/32—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines with an air by-pass around the air throttle valve or with an auxiliary air passage, e.g. with a variably controlled valve therein
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/50—Arrangement of fuel distributors, e.g. with means for supplying equal portion of metered fuel to injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Definitions

  • the invention relates to a fuel injection system for mixture-compressing, spark-ignited four-stroke internal combustion engines with injection into the intake manifolds, with a main intake manifold in which an air measuring element and an arbitrarily actuable throttle valve are arranged one behind the other, and in which all intake manifolds and the main intake manifold open into a common manifold , into which fuel is injected when the engine is cold started by an electromagnetically actuated injection nozzle.
  • the atomized fuel mixes with the intake air, but due to the relatively low air velocity in the intake manifold, part of the fuel is deposited on the inner wall of the intake manifold, which in the warm-up phase of the internal combustion engine due to intake manifold setbacks that result from a lean mixture or through delayed combustion, can be ignited.
  • the subsequent deflagration leads to considerable mechanical damage to components such as the throttle valve and the air measuring element.
  • the object of the invention is, while retaining the benefits of this additional fuel injection to the disadvantage of the V erpuffung of Saugrohrschreibeaun avoid due.
  • a fuel distributor device is arranged in the manifold intake manifold, which consists of a fuel intake part and fuel supply parts branching from it to the individual intake manifolds, and intake air is supplied to the fuel intake part by a bypass line guided past the throttle valve.
  • the fuel receiving part is formed by a receiving tube which extends axially into the manifold intake pipe and the fuel supply parts are formed by distributor pipes, one of which branches off into a suction pipe.
  • the fuel supply parts expediently branch off in the immediate vicinity of the corresponding intake pipe from the fuel receiving part.
  • the bypass line opens directly in the area of the injection nozzle into the fuel receiving part and the injection nozzle is arranged in the area of the fuel receiving part opposite the fuel supply parts.
  • a temperature-dependent auxiliary air slide is arranged in the bypass line. It has proven to be particularly expedient that the fuel supply parts extend into the intake manifolds to an extent which corresponds to the inner diameter of the intake manifolds.
  • the advantages achieved by the invention consist in particular in that during a cold start of the internal combustion engine a very good mixture formation takes place, by means of which an ignitable mixture is present down to the lowest temperatures. Due to the high flow velocity in the receiving tube, the air mixes very well with the fuel in this, an even distribution of this air-fuel mixture is achieved and the fuel which is deposited on the inner wall of the receiving tube is immediately transported to the cylinders. Flames flashing back from the combustion chambers cannot initiate deflagrations and the intensive mixing between the fuel and the air as well as the even distribution of the mixture across all cylinders result in very short start-up times and low exhaust gas emissions.
  • the mixture regulator 5 has a fuel quantity divider 5a, an air quantity meter 5b, a system pressure regulator 5c, a mixture regulating screw 5d and an air quantity meter contact 5e.
  • 6 is a warm-up controller
  • 7 is an electromagnetically actuated injection nozzle
  • 8 is a manifold from which the suction pipes 9 of an internal combustion engine (not shown) branch off
  • 10 is a temperature-dependent additional air slide valve
  • 11 is a throttle valve arranged in a main suction pipe 12
  • 13 is an idling adjustment screw.
  • the additional air slide valve 10 is arranged in a bypass line 14 which leads past the throttle valve 11 and is formed in a manner known per se by a shut-off device with an orifice plate which, when the internal combustion engine is cold, releases the air passage and blocks the air passage by electrically heated bimetal.
  • the manifold intake manifold 8 has a fuel distributor device 15, which consists of a fuel receiving part 16 and fuel supply parts 17 branching from it to the individual intake manifolds 9. Intake air is supplied to the fuel receiving part 16 through the bypass line 14.
  • the fuel receiving part 16, into which fuel is injected through the injection valve 7, is formed by a receiving pipe extending axially into the manifold 8 and the fuel supply parts 17 by manifolds, one of which branches off to a suction pipe 9.
  • the distributor pipes 17 branch off in the immediate vicinity of the corresponding suction pipe 9 from the receiving pipe.
  • the bypass line 14 opens directly in the area of the injection nozzle 7 into the fuel receiving part 16 and the injection nozzle 7 is arranged in the area of the fuel receiving part 16 opposite the fuel supply parts 17.
  • the fuel supply parts 17 extend into the intake manifolds 9 with approximately a dimension A, which corresponds to the inner diameter D of the intake manifolds 9.
  • the function of the invention is as follows:
  • the fuel injection system shown is a mechanical, continuously operating injection system for Otto engines, which does not require a drive from the internal combustion engine.
  • the fuel is by an electrically driven pump 2 R olle cells promoted.
  • the air quantity sucked in by the internal combustion engine during operation is measured with the air quantity meter 5b, which is installed in front of the throttle valve 11 of the internal combustion engine. Depending on the position of the throttle valve 11 or the accelerator pedal, more or less air is sucked in.
  • the fuel quantity divider 5a allocates a quantity of fuel to the individual cylinders of the internal combustion engine via the respective injection valve, which results in an optimal mixture with regard to internal combustion engine performance, fuel consumption and exhaust gas composition.
  • the air quantity meter 5b and the fuel quantity divider 5a are combined in one device, the mixture regulator 5.
  • the precisely measured amount of fuel is fed to the injection valves, which continuously spray the fuel in finely atomized form into the intake manifolds in front of the intake valves of the cylinders of the internal combustion engine. From there, the fuel is sucked into the engine cylinders with the air when the intake valves are opened.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
EP80104868A 1979-09-22 1980-08-16 Installation d'injection continue d'essence dans le système d'admission pour moteurs à combustion interne à quatre-temps, à compression du mélange et à allumage commandé Withdrawn EP0025866A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792938406 DE2938406A1 (de) 1979-09-22 1979-09-22 Kraftstoffeinspritzanlage fuer gemischverdichtende, fremdgezuendete viertakt-brennkraftmaschinen mit kontinuierlicher einspritzung in die saugrohre
DE2938406 1979-09-22

Publications (1)

Publication Number Publication Date
EP0025866A1 true EP0025866A1 (fr) 1981-04-01

Family

ID=6081583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104868A Withdrawn EP0025866A1 (fr) 1979-09-22 1980-08-16 Installation d'injection continue d'essence dans le système d'admission pour moteurs à combustion interne à quatre-temps, à compression du mélange et à allumage commandé

Country Status (3)

Country Link
US (1) US4355617A (fr)
EP (1) EP0025866A1 (fr)
DE (1) DE2938406A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211139A (en) * 1963-02-05 1965-10-12 Daimler Benz Ag Internal combustion engine
DE1526300A1 (de) * 1965-03-27 1970-02-12 Inst Francais Du Petrol Motor mit gesteuerter Zuendung
US3614945A (en) * 1968-07-31 1971-10-26 Bosch Gmbh Robert Valve for admitting fuel into intake manifolds of internal combustion engines during starting
US3685503A (en) * 1967-09-04 1972-08-22 Petrol Injection Ltd Fuel supply systems
DE2639659A1 (de) * 1976-09-03 1978-03-09 Porsche Ag Einrichtung zur verbesserung der kraftstoffaufbereitung in der startphase einer brennkraftmaschine
DE2754373A1 (de) * 1977-12-07 1979-06-13 Daimler Benz Ag Einspritzbrennkraftmaschine mit einem die kraftstoffmenge in abhaengigkeit von der menge der zugefuehrten verbrennungsluft einstellenden steuerventil

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2860616A (en) * 1957-05-31 1958-11-18 Gen Motors Corp Atmospheric nozzle control
DE1526647C3 (de) * 1966-07-13 1974-03-07 Daimler-Benz Ag, 7000 Stuttgart Vorrichtung zur Erzeugung eines Startgemischs für eine mehrzylindrige Einspritz-Brennkraftmaschine
GB1568832A (en) * 1976-01-14 1980-06-04 Plessey Co Ltd Apparatus for metering fuel for an engine
US4159703A (en) * 1976-12-10 1979-07-03 The Bendix Corporation Air assisted fuel atomizer
DE2704456A1 (de) * 1977-02-03 1978-08-10 Porsche Ag Brennkraftmaschine mit einer an dem leistungsregelorgan der brennkraftmaschine vorbeigefuehrten umgehungsleitung
US4227496A (en) * 1977-11-10 1980-10-14 Societe Industrielle De Brevets Et D'etudes S.I.B.E. Fuel supply devices for internal combustion engines
DE2757248A1 (de) * 1977-12-22 1979-06-28 Porsche Ag Kraftstoffeinspritzanlage fuer gemischverdichtende, fremdgezuendete brennkraftmaschinen
JPS597027B2 (ja) * 1978-03-22 1984-02-16 日産自動車株式会社 多気筒内燃機関の燃料供給装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211139A (en) * 1963-02-05 1965-10-12 Daimler Benz Ag Internal combustion engine
DE1526300A1 (de) * 1965-03-27 1970-02-12 Inst Francais Du Petrol Motor mit gesteuerter Zuendung
US3685503A (en) * 1967-09-04 1972-08-22 Petrol Injection Ltd Fuel supply systems
US3614945A (en) * 1968-07-31 1971-10-26 Bosch Gmbh Robert Valve for admitting fuel into intake manifolds of internal combustion engines during starting
DE2639659A1 (de) * 1976-09-03 1978-03-09 Porsche Ag Einrichtung zur verbesserung der kraftstoffaufbereitung in der startphase einer brennkraftmaschine
DE2754373A1 (de) * 1977-12-07 1979-06-13 Daimler Benz Ag Einspritzbrennkraftmaschine mit einem die kraftstoffmenge in abhaengigkeit von der menge der zugefuehrten verbrennungsluft einstellenden steuerventil

Also Published As

Publication number Publication date
DE2938406A1 (de) 1981-04-09
US4355617A (en) 1982-10-26

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19810825

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Withdrawal date: 19820819

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Inventor name: DORSCH, HEINZ, DIPL.-ING.