DE2548549A1 - IC engine indirect fuel injector - volume temp. and depression are dependant on differential pressure valve - Google Patents

IC engine indirect fuel injector - volume temp. and depression are dependant on differential pressure valve

Info

Publication number
DE2548549A1
DE2548549A1 DE19752548549 DE2548549A DE2548549A1 DE 2548549 A1 DE2548549 A1 DE 2548549A1 DE 19752548549 DE19752548549 DE 19752548549 DE 2548549 A DE2548549 A DE 2548549A DE 2548549 A1 DE2548549 A1 DE 2548549A1
Authority
DE
Germany
Prior art keywords
fuel
diaphragm
fuel injector
cone
chamber
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.)
Granted
Application number
DE19752548549
Other languages
German (de)
Other versions
DE2548549B2 (en
DE2548549C3 (en
Inventor
Karl Ing Grad Schmidt
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.)
Deutsche Vergaser GmbH and Co KG
Original Assignee
Deutsche Vergaser GmbH and Co KG
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 Deutsche Vergaser GmbH and Co KG filed Critical Deutsche Vergaser GmbH and Co KG
Priority to DE19752548549 priority Critical patent/DE2548549C3/en
Publication of DE2548549A1 publication Critical patent/DE2548549A1/en
Publication of DE2548549B2 publication Critical patent/DE2548549B2/en
Application granted granted Critical
Publication of DE2548549C3 publication Critical patent/DE2548549C3/en
Expired legal-status Critical Current

Links

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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/048—Injectors peculiar thereto having variable fuel outlets, e.g. controlled by a valve actuated by operator
    • 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
    • F02M69/16—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors
    • F02M69/26—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means varying fuel pressure in a fuel by-pass passage, the pressure acting on a throttle valve against the action of metered or throttled fuel pressure for variably throttling fuel flow to injection nozzles, e.g. to keep constant the pressure differential at the metering valve
    • 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
    • F02M69/36—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 having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages
    • F02M69/42—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 having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages using other means than variable fluid pressure, e.g. acting on the fuel metering device mechanically or electrically

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The fuel is regulated by an air volume flap (3) and distributed (4) to each fuel injector (7). The fuel injectors are situated close to each inlet valve. The fuel injector consists of a housing separated by a dividing wall ('8) into two compartments (9, 10). Each compartment contains adiaphrgam (6, 11) to which the injector closing valve cone (12) is attached by means of a push rod (13). The chamber (10) above the first diaphragm (6) is continuously subjected to fuel pump pressure (1). The chamber below the diaphragm is subjected to the opening press re from the distributor (4) and the return spring (15). The closing valve cone (17) is of metal and provided with a flexible coating. The basic fuel requirements are supplemented by the upper chamber diaphragm (11). The lower side of the diaphragm is subject to depression downstream to the throttle valve (19) and the upper diaphragm side is open to atmosphere. For cold start, an electrically heated bi-metal strip (20) engages with a projection (21) formed on the diaphragm push rod (13).

Description

Einsritzventil für ein EindüseneinspritzsystemSingle-seat valve for a single-nozzle injection system

Bei kontinuierlich arbeitenden Einspritzsystemen für Ottomotoren sind für verschiedene Betriebszustände Brennstoffmengen beeinflussende Einrichtungen erforderlich, zum Beispiel für den Warmlauf oder für den Vollastbereich. Bei der Verwendung von mehreren Einspritzdüsen, die in das Saugrohr in der Nähe des Einlaßventils des jeweiligen Zylinders einspritzen, sind diese Einrichtungen so angeordnet, daß sie für alle Einspritzdüsen gleichzeitig wirken, zum Beispiel vor einem Brennstoffmengenteiler.In continuously operating injection systems for gasoline engines are Devices influencing fuel quantities for different operating states required, for example for warming up or for the full load range. In the Use of multiple injectors placed in the intake manifold near the intake valve inject the respective cylinder, these devices are arranged so that they act simultaneously for all injection nozzles, for example in front of a fuel flow divider.

Aufgabe der Erfindung ist es den Bauaufwand für diese Einrichtungen zu verringern.The object of the invention is the construction costs for these facilities to reduce.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die mit einem Schließkegel versehene Einspritzdüse mit einem Differenzdruckventil vereint ist, dessen Membran einerseits von einer Feder und dem Öffnungsdruck des Brennstoffs über eine Leitung und andererseits vom Systemdruck über eine Leitung belastet ist und daß der Schließkegel über eine in einer zweiten Kammer angeordneten Membran in Ajbhängigkeit vom Saugrohrdruck über eine Leitung zu steuern ist und daß der Schließkegel über eine Bimetallfeder zu steuern ist.This object is achieved in that the with a The injection nozzle provided with a closing cone is combined with a differential pressure valve, its membrane on the one hand by a spring and the opening pressure the fuel via a line and, on the other hand, from the system pressure via a line is loaded and that the closing cone is arranged in a second chamber via a Diaphragm is to be controlled in dependence on the intake manifold pressure via a line and that the locking cone can be controlled via a bimetal spring.

Die Erfindung hat den Vorteil, daß ein baulich kompaktes Einspritzventil die für verschiedene Betriebszustände erforderlichen Einrichtungen zur Beeinflussung der Brennstoffmenge vereint.The invention has the advantage that a structurally compact injection valve the influencing devices required for different operating states the amount of fuel combined.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt und wird im folgenden näher beschrieben. Der von der Pumpe 1 gelieferte Brennstoff gelangt über einen in AbhAngigkeit vom Luftdurchsatz im Saugrohr 2 mittels einer Stauklappe 3 gesteuerten Brennstoffmengenzuteiler 4 über eine Leitung 5 unterhalb einer Membran 6 in das Einspritzventil 7. Das Einspritzventil 7 ist durch eine Trennwand 8 in zwei Kammern 9 und 10 unterteilt, in denen sich jeweils eine Membran 6, lt befindet an denen ein Schließkegel 12 mittels eines Stößels 13 befestigt ist.An embodiment of the invention is shown schematically in the drawing and is described in more detail below. The one delivered by pump 1 Depending on the air throughput in the intake manifold 2, fuel arrives via a a damper 3 controlled fuel meter 4 via a line 5 below a membrane 6 in the injection valve 7. The injection valve 7 is through a partition 8 divided into two chambers 9 and 10, each of which has a membrane 6, according to FIG is located on which a locking cone 12 is attached by means of a plunger 13.

In der Kammer 10 wirkt oberhalb der Membran 6 über die Leitung 14 stets der von der Pumpe 1 bestimmte Druck. Auf die Gegenseite der Membran 6 wirkt die über den Brennstoffmengenzuteiler 4 gesteuerte Einspritzmenge mit dem öffnungsdruck und die Kraft der Feder 15, die die Grundbrennstoffmenge für den heißen Zustand der Brennkraftmaschine bestimmt. Der Brennstoff wird über den Dosierkegel 12 und die Einspritzdüse 16 über einen als Zerstäubungskegel 17 dienenden mit einem elastischen Überzug versehenen Metallkegel in das Saugrohr gespritzt. Der Zerstäubungskegel 17 verhindert im drucklosen Zustand und bei Druckausgleich, bei nicht laufender Pumpe 1, daß sich das Brennstoffsystem entleert, da er dann durch die Feder 15 von außen an die Einspritzdüse 16 gepreßt ist.In the chamber 10 acts above the membrane 6 via the line 14 always the pressure determined by pump 1. Acts on the opposite side of the membrane 6 the one via the fuel meter 4 controlled injection quantity with the opening pressure and the force of the spring 15, which is the basic amount of fuel for determines the hot state of the internal combustion engine. The fuel is over the Dosing cone 12 and the injection nozzle 16 via an atomizing cone 17 serving With a metal cone provided with an elastic coating, injected into the suction tube. The atomization cone 17 prevents in the unpressurized state and with pressure equalization, when pump 1 is not running, that the fuel system is emptied, since he then is pressed against the injection nozzle 16 from the outside by the spring 15.

Bei wechselnden Betriebszuständen erfolgt die Steuerung von zusätzlich zur Grundbrennstoffmenge erforderlichen Brennstoffmengen in der oberen Kammer 9. Über eine Leitung 18 ist die Unterseite der mit dem Stößel 13 fest verbundene Membran 11 mit dem Saugrohr druck stromab der Drosselklappe 19 und die Oberseite der Membran 11 mit der Atmosphäre beaufschlagt. Im Teillastbereich wird daher über den Dosierkegel 12 entgegen der Kraft der Feder 15 die aus der Einspritzdüse 16 austretende Brennstoffmenge verringert, während dies bei geöffneter Drosselklappe 19 im Vollastbereich nicht der Fall ist, da der Druck angestiegen ist.If the operating status changes, the control is also carried out by Amounts of fuel required for the amount of basic fuel in the upper chamber 9. The underside of the membrane firmly connected to the plunger 13 is connected via a line 18 11 with the intake manifold pressure downstream of the throttle valve 19 and the top of the membrane 11 exposed to the atmosphere. In the partial load range, the metering cone is used 12 against the force of the spring 15, the amount of fuel emerging from the injection nozzle 16 reduced, while this is not with the throttle valve 19 open in the full load range is the case because the pressure has increased.

Beim Start und in der Warmlaufphase ist eine Brennstoffmengenanreicherung erforderlich, die dadurch erfolgt, daß eine mit dem Einschalten der Brennstoffpumpe beheizte Bimetallfeder 20 über eine Nase 21 des Stößels 13 den Dosierkegel 12 in Öffnungsrichtung bewegt. Mit zunehmender Erwärmung der Bimetallfeder 20 läßt diese Kraft nach bis überhaupt keine Berührung mehr mit der Nase 21 besteht.At the start and in the warm-up phase there is a fuel enrichment required, which takes place in that one with switching on the fuel pump heated bimetal spring 20 via a nose 21 of the plunger 13 the Dosing cone 12 moved in the opening direction. With increasing heating of the bimetal spring 20 this force decreases until there is no longer any contact with the nose 21.

Es besteht ferner die Möglichkeit an dem Stößel 13 eine bekannte Höhenkorrektur angreifen zu lassen und es ist auch möglich dieses Einspritzventil als Steuerglied in einem Regelkreis zum Beispiel mit einem Sauerstoffsensor zu verwenden.There is also the possibility of a known height correction on the plunger 13 to attack and it is also possible to use this injection valve as a control element to be used in a control loop with an oxygen sensor, for example.

Lee rws ei teLee rws ei te

Claims (2)

PatentanspFUche Einspritzventil für ein Eindüseneinspritzsystem, dadurch gekennzeichnet, daß die mit einem Schließkegel ( 12 ) versehene Einspritzdüse ( 16 ) mit einem Differenzdruckventil vereint ist, dessen Membran ( 6 ) einerseits von einer Feder(15 ) und dem Öffnungsdruck des Brennstoffs über eine Leitung ( 5 ) und andererseits vom Systemdruck über eine Leitung ( 14 ) belastet ist und daß der Schließkegel ( 12 ) über eine in einer zweiten Kammer ( 9 ) angeordnete Membran ( 11 ) in Abhängigkeit vom Saugrohrdruck über eine Leitung ( 18 ) zu steuern ist und daß der Schließkegel ( 12 ) über eine Bimetallfeder ( 20 ) zu steuern ist.Patent claims injection valve for a single-nozzle injection system, thereby characterized in that the injection nozzle (12) provided with a closing cone ( 16) is combined with a differential pressure valve, the membrane (6) of which on the one hand by a spring (15) and the opening pressure of the fuel via a line (5 ) and on the other hand is loaded by the system pressure via a line (14) and that the closing cone (12) via a membrane arranged in a second chamber (9) (11) is to be controlled via a line (18) as a function of the intake manifold pressure and that the closing cone (12) can be controlled via a bimetal spring (20). 2) Einspritzventil nach Anspruch 1, dadurch gekennzeichnet.2) Injection valve according to claim 1, characterized. daß an dem Schließkegel ( 12 ) ein mit einem elastischen Überzug versehener Metallkegel ( 17 ) angeordnet ist. that on the closing cone (12) with an elastic coating provided metal cone (17) is arranged.
DE19752548549 1975-10-30 1975-10-30 Device for manifold injection for internal combustion engines Expired DE2548549C3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752548549 DE2548549C3 (en) 1975-10-30 1975-10-30 Device for manifold injection for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752548549 DE2548549C3 (en) 1975-10-30 1975-10-30 Device for manifold injection for internal combustion engines

Publications (3)

Publication Number Publication Date
DE2548549A1 true DE2548549A1 (en) 1977-05-12
DE2548549B2 DE2548549B2 (en) 1978-01-26
DE2548549C3 DE2548549C3 (en) 1978-10-12

Family

ID=5960417

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752548549 Expired DE2548549C3 (en) 1975-10-30 1975-10-30 Device for manifold injection for internal combustion engines

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DE (1) DE2548549C3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2843534A1 (en) * 1977-10-06 1979-04-19 Aisan Ind IC engine fuel injection valve outlet channel - contains fuel heating element of ceramic semiconductor material in insulated housing
FR2461107A1 (en) * 1979-07-05 1981-01-30 Audi Ag FUEL INJECTION INSTALLATION FOR INTERNAL COMBUSTION ENGINES
US9908753B2 (en) 2012-12-14 2018-03-06 Konecranes Plc Chain hoist with improved chain entry

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2843534A1 (en) * 1977-10-06 1979-04-19 Aisan Ind IC engine fuel injection valve outlet channel - contains fuel heating element of ceramic semiconductor material in insulated housing
FR2461107A1 (en) * 1979-07-05 1981-01-30 Audi Ag FUEL INJECTION INSTALLATION FOR INTERNAL COMBUSTION ENGINES
US9908753B2 (en) 2012-12-14 2018-03-06 Konecranes Plc Chain hoist with improved chain entry

Also Published As

Publication number Publication date
DE2548549B2 (en) 1978-01-26
DE2548549C3 (en) 1978-10-12

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Legal Events

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BGA New person/name/address of the applicant
C3 Grant after two publication steps (3rd publication)
8339 Ceased/non-payment of the annual fee