EP0426780A1 - Fuel distributor for fuel injection systems in internal combustion engines. - Google Patents

Fuel distributor for fuel injection systems in internal combustion engines.

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Publication number
EP0426780A1
EP0426780A1 EP19900904598 EP90904598A EP0426780A1 EP 0426780 A1 EP0426780 A1 EP 0426780A1 EP 19900904598 EP19900904598 EP 19900904598 EP 90904598 A EP90904598 A EP 90904598A EP 0426780 A1 EP0426780 A1 EP 0426780A1
Authority
EP
European Patent Office
Prior art keywords
fuel
line
fuel line
distributor
opening
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
EP19900904598
Other languages
German (de)
French (fr)
Other versions
EP0426780B1 (en
Inventor
Karl 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 EP0426780A1 publication Critical patent/EP0426780A1/en
Application granted granted Critical
Publication of EP0426780B1 publication Critical patent/EP0426780B1/en
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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • 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
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails

Definitions

  • the invention relates to a fuel distributor for fuel injection systems of internal combustion engines of the type defined in the preamble of claim 1.
  • Such a fuel distributor is described for example in DE 37 30 571 AI. Due to the fuel-filled annular space surrounding the fuel injection valves, these are directly surrounded by fuel and are thereby cooled. Cooling the
  • Fuel injection valves reduce their thermal load and thereby improve the hot start behavior of the internal combustion engine as a whole.
  • the fuel dispenser according to the invention with the characterizing features of claim 1 has the advantage that a flushing of the fuel injectors is forced through almost 360 ° by the flow orifice assigned to each fuel injection valve in the fuel line. In this way, the valve housing is flushed with fuel over a larger housing area and thus improves the cooling effect.
  • the improved cooling leads to a lower temperature level in the fuel injection valves during the operating phase of the internal combustion engine, so that the maximum temperature reached in the shutdown phase of the internal combustion engine in the
  • Fuel injection valves are already lower. Due to this lower temperature level, the formation of bubbles in the fuel is less during the shutdown phase of the internal combustion engine.
  • hot start the entire surface of the valve housing is cooled quickly and intensively and fresh, cool fuel is supplied to the valve chamber. The vapors condense in the fuel and are partly entrained so that the hot start behavior of the internal combustion engine is significantly improved.
  • FIG. 1 is a side view of a fuel distributor for a fuel injection system of a four-cylinder internal combustion engine
  • Fig. 3 shows a section along the line III-III in Fig.l in an enlarged view.
  • Fuel distributor for a fuel injection system of a four-cylinder internal combustion engine is used for mounting
  • Fuel injection valves 10 and the fuel line which is smaller in diameter and runs inside the supply line 13, serves as return line 14 for returning fuel to a fuel tank (not shown).
  • Feed line 13 and return line 14 are connected to one another via a pressure control valve 15 and are connected at their free ends to a connecting piece 16 and 17, respectively.
  • the direction of flow of the fuel is marked by arrows on the connecting piece 16, 17.
  • the feed line 13 is guided tangentially past the receiving bores 12 and communicates with the receiving bores 12 via openings 18 penetrating through the bore or line wall.
  • a fuel injection valve 10 is inserted in a liquid-tight manner in each receiving bore 12, which is effected by means of two O-rings 19, 20 (FIG. 3).
  • the stepped valve housing 21 is supported with an annular flange 22 on an annular shoulder 23 coaxially surrounding the receiving bore 12 and protrudes from the receiving bore 12 with an orifice 24, which has a fuel spray opening that cannot be seen at the end. Due to the gradation of the valve housing 21, an annular space 25 is formed between the valve housing 21 and the bore wall of the receiving bore 12, which is always with
  • Fuel is full. Fuel is supplied from this annular space 25 to a valve space present in the interior of the valve housing 21 via a sieve body 26. After inserting the fuel injection valves 10 into the receiving bores 12, the one on the distributor housing 11 is the same
  • Fuel injector 10 is assigned and is used to make electrical contact.
  • flow orifices 29 are arranged in the latter in association with each receiving bore 12, which are approximately centered on the opening 18 and thus on the receiving bore 12 or Valve housing 21 of the fuel injection valve 10 are. These flow orifices 29 force the fuel to flow around the associated valve housing 21 by almost 360 °.
  • Each flow orifice 29 is formed by a disc 30 which is transverse to the opening 18 and
  • the return line 14 has a cross-sectional profile that deviates from the circular shape, one dimension of which is larger than the dimension perpendicular to it. In the exemplary embodiment in FIG. 3, this cross-sectional profile is approximately rectangular with rounded corners.
  • Each disc 30 has a central opening 31, the
  • Opening cross-section corresponds approximately to the cross-sectional profile of the return line 14, but is rotated 90 ° with respect to this.
  • the discs 30 are rotated 90 ° relative to their end position with the opening 31 pushed over the return line 14 and in their respective
  • the fuel line 14 can take over the function of the supply line and the fuel line 13 can take over the function of the return line.
  • the connecting piece 16 is to be connected to the fuel tank and the connecting piece 17 to the feed pump, also not shown, which draws the fuel from the fuel tank and delivers it to the fuel injection valves 10.

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

Abstract

Le distributeur de carburant décrit comporte un carter allongé (11) comprenant une pluralité d'alésages de réception (12) agencés à distance axiale, chacun recevant une soupage d'injection de carburant (10), et au moins une canalisation de carburant (13) qui s'étend axialement et passe tangentiellement devant les alésages de réception (12). Ladite canalisation de carburant communique par des ouvertures (18) avec les alésages de réception (12). Le carburant s'écoule autour des soupapes d'injection (10) par les ouvertures (18), ce qui assure l'alimentation en carburant ainsi que le refroidissement. Pour améliorer l'efficacité du refroidissement, des membranes d'écoulement (29) associées à chaque alésage de réception (12) sont disposées approximativement au centre de chaque ouverture. On obtient ainsi un balayage forcé des soupapes d'injection de carburant (10) sur environ 360°.The disclosed fuel distributor has an elongated housing (11) comprising a plurality of receiving bores (12) arranged at an axial distance, each receiving a fuel injection valve (10), and at least one fuel line (13). ) which extends axially and passes tangentially in front of the receiving bores (12). Said fuel line communicates through openings (18) with the receiving bores (12). Fuel flows around the injection valves (10) through the openings (18), providing fuel as well as cooling. To improve cooling efficiency, flow membranes (29) associated with each receiving bore (12) are disposed approximately in the center of each opening. This results in a forced sweep of the fuel injection valves (10) over approximately 360 °.

Description

KraftstoffVerteiler für Kraftstoffeinspritzanlagen von BrennkraftmaschinenFuel distributor for fuel injection systems of internal combustion engines
Stand der TechnikState of the art
Die Erfindung geht aus von einem KraftstoffVerteiler für Kraftstoffeinspritzanlagen von Brennkraftmaschinen der im Oberbegriff des Anspruchs 1 definierten Gattung.The invention relates to a fuel distributor for fuel injection systems of internal combustion engines of the type defined in the preamble of claim 1.
Ein solcher KraftstoffVerteiler ist beispielsweise in der DE 37 30 571 AI beschrieben. Durch den die Kraftstoffeinspritzventile umgebenden kraftstoffgefüllten Ringraum sind diese unmittelbar von Kraftstoff umgeben und werden dadurch gekühlt. Die Kühlung derSuch a fuel distributor is described for example in DE 37 30 571 AI. Due to the fuel-filled annular space surrounding the fuel injection valves, these are directly surrounded by fuel and are thereby cooled. Cooling the
Kraftstoffeinspritzventile senkt deren Wärmebelastung und verbessert dadurch insgesamt das Heißstartverhalten der Brennkraftmaschine.Fuel injection valves reduce their thermal load and thereby improve the hot start behavior of the internal combustion engine as a whole.
Die tangentiale Anströmung der Kraftstoffeinspritzventile läßt allerdings die volle Ausnutzung des Kühlvermögens des Kraftstoffs nicht zu, da eine vollständige Umströmung der Kraftstoffeinspritzventile nicht erreicht wird.The tangential inflow of the fuel injection valves, however, allows full use of the cooling capacity of the fuel because a complete flow around the fuel injection valves is not achieved.
Vorteile der ErfindungAdvantages of the invention
Der erfindungsgemäße Kraftstoff erteiler mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, daß durch die jedem Kraftstoffeinspritzventil zugeordnete Strömungsblende in der Kraftstoffleitung eine Umspülung der Kraftstoffeinspritzventile um nahezu 360° erzwungen wird. Damit wird das Ventilgehäuse über einen größeren Gehäusebereich intenviser mit Kraftstoff gespült und damit die Kühlwirkung verbessert. Die verbesserte Kühlung führt zu einem niedrigeren Temperaturniveau in den Kraftstoffeinspritzventilen während der Betriebsphase der Brennkraftmaschine, so daß die in der Abstellphase der Brennkraftmaschine erreichte Maximaltemperatur in denThe fuel dispenser according to the invention with the characterizing features of claim 1 has the advantage that a flushing of the fuel injectors is forced through almost 360 ° by the flow orifice assigned to each fuel injection valve in the fuel line. In this way, the valve housing is flushed with fuel over a larger housing area and thus improves the cooling effect. The improved cooling leads to a lower temperature level in the fuel injection valves during the operating phase of the internal combustion engine, so that the maximum temperature reached in the shutdown phase of the internal combustion engine in the
Kraftstoffeinspritzventilen bereits niedriger liegt. Durch dieses niedrigere Temperaturniveau ist die Blasenbildung im Kraftstoff während der Abstellphase der Brennkraftmaschine geringer. Beim Start der Brennkraftmaschine in dieser heißen Abstellphase (Heißstart) wird das Ventilgehäuse an der gesamten Oberfläche schnell und intensiv gekühlt und dem Ventilraum frischer, kühler Kraftstoff zugeführt. Die Dampf lasen im Kraftstoff kondensieren und werden z.T. mitgerissen, so daß das Heißstartverhalten der Brennkraftmaschine wesentlich verbessert wird.Fuel injection valves are already lower. Due to this lower temperature level, the formation of bubbles in the fuel is less during the shutdown phase of the internal combustion engine. When the internal combustion engine starts in this hot shutdown phase (hot start), the entire surface of the valve housing is cooled quickly and intensively and fresh, cool fuel is supplied to the valve chamber. The vapors condense in the fuel and are partly entrained so that the hot start behavior of the internal combustion engine is significantly improved.
Durch die in den weiteren Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Kraftstoff erteilers möglich. ZeichnungThe measures listed in the further claims advantageous refinements and improvements of the fuel dispenser specified in claim 1 are possible. drawing
Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels in der nachfolgenden Beschreibung näher erläutert. Es zeigen:The invention is explained in more detail in the following description with reference to an embodiment shown in the drawing. Show it:
Fig. 1 eine Seitenansicht eines KraftstoffVerteilers für eine Kraftstoffeinspritzanlage einer vierzylindrigen Brennkraftmaschine,1 is a side view of a fuel distributor for a fuel injection system of a four-cylinder internal combustion engine,
Fig. 2 einen Schnitt längs der Linie II-II in Fig.l,2 shows a section along the line II-II in Fig.l,
Fig. 3 einen Schnitt längs der Linie III-III in Fig.l in vergrößerter Darstellung.Fig. 3 shows a section along the line III-III in Fig.l in an enlarged view.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Der in Fig.l in Seitenansicht und in Fig.2 und 3 in verschiedenen Schnittdarstellungen zu sehendeThe one seen in Fig.l in side view and in Fig.2 and 3 in different sectional views
KraftstoffVerteiler für eine Kraftstoffeinspritzanlage einer vierzylindrigen Brennkraftmaschine dient der Halterung,Fuel distributor for a fuel injection system of a four-cylinder internal combustion engine is used for mounting,
KraftstoffVersorgung und elektrischen Kontaktierung von vier elektromagnetisch betätigten Kraftstoffeinspritzventilen 10. Er weist ein langgestrecktes Verteilergehäuse 11 auf, das vier im Axialabstand eingebrachte Aufnahmebohrungen 12 und zwei koaxiale Kraftstoffleitungen aufweist, von denen die durchmessergrößere Kraftstoffleitung als Zuführleitung 13 der Zuführung von Kraftstoff zu denFuel supply and electrical contacting of four electromagnetically actuated fuel injection valves 10. It has an elongated distributor housing 11 which has four receiving bores 12 made at an axial distance and two coaxial fuel lines, of which the larger-diameter fuel line serves as the supply line 13 for supplying fuel to the
Kraftstoffeinspritzventilen 10 und die im Durchmesser kleinere, im Innern der Zuführleitung 13 verlaufende Kraftstoffleitung als Rückführleitung 14 der Rückführung von Kraftstoff zu einem nicht dargestellten Kraftstofftank dient. Zuführleitung 13 und Rückführleitung 14 sind über ein Druckregelventil 15 miteinander verbunden und mit ihrem freien Ende jeweils an einem Anschlußstutzen 16 bzw. 17 angeschlossen. Die Strömungsrichtung des Kraftstoffs ist durch Pfeile an den Anschlußstutzen 16,17 gekennzeichnet.Fuel injection valves 10 and the fuel line, which is smaller in diameter and runs inside the supply line 13, serves as return line 14 for returning fuel to a fuel tank (not shown). Feed line 13 and return line 14 are connected to one another via a pressure control valve 15 and are connected at their free ends to a connecting piece 16 and 17, respectively. The direction of flow of the fuel is marked by arrows on the connecting piece 16, 17.
Die Zuführleitung 13 ist an den Aufnahmebohrungen 12 tangential vorbeigeführt und steht über die Bohrungs- bzw. Leitungswand durchdringende Öffnungen 18 mit den Aufnahmebohrungen 12 in Verbindung. In jede Aufnahmebohrung 12 ist ein Kraftstoffeinspritzventil 10 flüssigkeitsdicht eingesetzt, was mittels zweier O-Ringe 19,20 (Fig.3) bewirkt wird. Das stufig ausgebildete Ventilgehäuse 21 stützt sich dabei mit einem Ringflansch 22 an einer die Aufnahmebohrung 12 koaxial umgebenden Ringschulter 23 ab und ragt mit einem Mündungsstutzen 24, der stirnseitig eine nicht zu sehende Kraftstoffabspritzöffnung trägt, aus der Aufnahmebohrung 12 hervor. Durch die Abstufung des Ventilgehäuses 21 entsteht zwischen dem Ventilgehäuse 21 und der Bohrungswand der Aufnahmebohrung 12 ein Ringraum 25, der ständig mitThe feed line 13 is guided tangentially past the receiving bores 12 and communicates with the receiving bores 12 via openings 18 penetrating through the bore or line wall. A fuel injection valve 10 is inserted in a liquid-tight manner in each receiving bore 12, which is effected by means of two O-rings 19, 20 (FIG. 3). The stepped valve housing 21 is supported with an annular flange 22 on an annular shoulder 23 coaxially surrounding the receiving bore 12 and protrudes from the receiving bore 12 with an orifice 24, which has a fuel spray opening that cannot be seen at the end. Due to the gradation of the valve housing 21, an annular space 25 is formed between the valve housing 21 and the bore wall of the receiving bore 12, which is always with
Kraftstoff gefüllt ist. Aus diesem Ringraum 25 wird einem im Innern des Ventilgehäuses 21 vorhandenen Ventilraum über einen Siebkörper 26 Kraftstoff zugeführt. Nach Einsetzen der Kraftstoffeinspritzventile 10 in die Aufnahmebohrungen 12 wird auf das Verteilergehäuse 11 eine zugleich derFuel is full. Fuel is supplied from this annular space 25 to a valve space present in the interior of the valve housing 21 via a sieve body 26. After inserting the fuel injection valves 10 into the receiving bores 12, the one on the distributor housing 11 is the same
Arretierung der Kraftstoffeinspritzventile 10 in den Aufnahembohrungen 12 dienende Kontaktleiste 27 aufgesetzt, die ebenso wie das Verteilergehäuse 11 aus Kunststoff besteht. In der Kontaktleiste 27 sind vier Stecker 28 angeordnet, von denen jeder Stecker 28 einemLocking of the fuel injection valves 10 in the receiving bores 12 serving contact strip 27 is placed, which, like the distributor housing 11, consists of plastic. Four plugs 28 are arranged in the contact strip 27, of which each plug 28 is one
Kraftstoffeinspritzventil 10 zugeordnet ist und zu dessen elektrischer Kontaktierung dient.Fuel injector 10 is assigned and is used to make electrical contact.
Zur Erzielung einer intensiven und großflächigen Kühlung der Ventilgehäuse 21 durch den an den Ventilgehäusen 21 vorbeifließenden Kraftstoff in der Zuführleitung 13 sind in letzterer in Zuordnung zu jeder Aufnahmebohrung 12 Strömungsblenden 29 angeordnet, die etwa mittig zur Öffnung 18 und damit zur Aufnahmebohrung 12 bzw. zum Ventilgehäuse 21 des Kraftstoffeinspritzventils 10 liegen. Durch diese Strömungsblenden 29 wird der Kraftstoff gezwungen, um nahezu 360° das zugeordnete Ventilgehäuse 21 zu umfließen. Jede Strömungsblende 29 wird von einer Scheibe 30 gebildet, die quer zur Öffnung 18 und zurIn order to achieve intensive and extensive cooling of the valve housing 21 by the fuel flowing past the valve housing 21 in the supply line 13, flow orifices 29 are arranged in the latter in association with each receiving bore 12, which are approximately centered on the opening 18 and thus on the receiving bore 12 or Valve housing 21 of the fuel injection valve 10 are. These flow orifices 29 force the fuel to flow around the associated valve housing 21 by almost 360 °. Each flow orifice 29 is formed by a disc 30 which is transverse to the opening 18 and
Strömungsrichtung in der Zuführleitung 13 ausgerichtet ist und gegenüber der Leitungswand der Zuführleitung 13 einen kleinen Ringspalt 32 freigibt. Alle Scheiben 30 sind auf der Rückführleitung 14 befestigt. Wie aus Fig.3 ersichtlich ist, weist hierzu die Rückführleitung 14 ein von der Kreisform abweichendes Querschnittsprofil auf, dessen eine Abmessung größer ist als die dazu rechtwinklige Abmessung. Im Ausführungsbeispiel in Fig.3 ist dieses Querschnittsprofil etwa rechteckförmig mit abgerundeten Ecken. Jede Scheibe 30 weist eine zentrale Öffnung 31 auf, derenFlow direction is aligned in the feed line 13 and releases a small annular gap 32 with respect to the line wall of the feed line 13. All disks 30 are fastened on the return line 14. As can be seen from FIG. 3, for this purpose the return line 14 has a cross-sectional profile that deviates from the circular shape, one dimension of which is larger than the dimension perpendicular to it. In the exemplary embodiment in FIG. 3, this cross-sectional profile is approximately rectangular with rounded corners. Each disc 30 has a central opening 31, the
Öffnungsquerschnitt etwa dem Querschnittsprofil der Rückführleitung 14 entspricht, gegenüber diesem jedoch um 90° gedreht ist. Die Scheiben 30 werden um 90° gegenüber ihrer Endstellung gedreht mit der Öffnung 31 über die Rückführleitung 14 geschoben und in ihrer jeweiligenOpening cross-section corresponds approximately to the cross-sectional profile of the return line 14, but is rotated 90 ° with respect to this. The discs 30 are rotated 90 ° relative to their end position with the opening 31 pushed over the return line 14 and in their respective
Zuordnungsposition bei den einzelnen Aufnahmebohrungen 12 um 90° in ihre Endstellung gedreht. Dadurch verklemmen sich die Scheiben 30 auf der Rückführleitung 14 und werden daselbst kraftschlüssig gehalten.Assignment position in the individual mounting holes 12 rotated by 90 ° into their end position. As a result, the disks 30 jam on the return line 14 and are non-positively held there.
Die Erfindung ist nicht auf das beschriebeneThe invention is not based on the described
Ausführungsbeispiel beschränkt. So kann durch Umkehrung der Richtung des Kraftstofflusses die Kraftstoffleitung 14 die Funktion der Zuführleitung und die Kraf stoffleitung 13 die Funktion der Rückführleitung übernehmen. Hierzu ist lediglich der Anschlußstutzen 16 mit dem Kraftstofftank und der Anschlußstutzen 17 mit der ebenfalls nicht dargestellten Förderpumpe zu verbinden, die den Kraftstoff aus dem Kraftstofftank ansaugt und zu den Kraftstoffeinspritzventilen 10 fördert. Embodiment limited. Thus, by reversing the direction of the fuel flow, the fuel line 14 can take over the function of the supply line and the fuel line 13 can take over the function of the return line. For this purpose, only the connecting piece 16 is to be connected to the fuel tank and the connecting piece 17 to the feed pump, also not shown, which draws the fuel from the fuel tank and delivers it to the fuel injection valves 10.

Claims

Ansprüche Expectations
1. KraftstoffVerteiler für Kraftstoffeinspritzanlagen von Brennkraftmaschinen mit einem langgestreckten Ventilgehäuse, das eine Mehrzahl von im Axialabstand eingebrachten Aufnahmebohrungen und mindestens eine sich axial erstreckende Kraftstoffleitung aufweist, die an den Aufnahmebohrungen tangential vorbeiführt und über jeweils eine die Bohrungs- bzw. Leitungswand durchdringende Öffnung mit den Aufnahmebohrungen in Verbindung steht, und mit einer Mehrzahl von in jeweils einer Aufnahmebohrung unter Belassung eines der Kraftstoffumspülung dienenden Ringraums zur Bohrungswand flüssigkeitsdicht eingesetzten Kraftstoffeinspritzventilen, deren Ventilraum über mindestens einen Zulauf mit dem Ringraum in Verbindung steht und die mit jeweils einer1.Fuel distributor for fuel injection systems of internal combustion engines with an elongated valve housing which has a plurality of axially spaced receiving bores and at least one axially extending fuel line which tangentially leads past the receiving bores and via an opening with the receiving bores penetrating the bore or line wall is in communication, and with a plurality of fuel injectors used in each case in a receiving bore while leaving an annular space serving to flush the fuel with respect to the bore wall, the valve space of which is connected to the annular space via at least one inlet and each with one
Kraftstoffabspritzöffnung aus der Aufnahmebohrung herausragen, dadurch gekennzeichnet, daß in der Kraftstoffleitung (13) Strömungsblenden (29) in Zuordnung zu jeder Aufnahmebohrung (12) etwa mittig zur Öffnung (18) angeordnet sind.Project fuel injection opening from the receiving bore, characterized in that in the fuel line (13) flow orifices (29) in Allocation to each receiving bore (12) are arranged approximately centrally to the opening (18).
2. Verteiler nach Anspruch 1, dadurch gekennzeichnet, daß jede Strömungsblende (29) von einer Scheibe (30) gebildet ist, die quer zur Öffnung (18) und zur Strömungsrichtung in der Kraftstoffleitung (13) angeordnet ist und gegenüber der Leitungswand der Kraftstoffleitung (13) einen Ringspalt (32) freigibt.2. Distributor according to claim 1, characterized in that each flow orifice (29) is formed by a disc (30) which is arranged transversely to the opening (18) and the flow direction in the fuel line (13) and opposite the line wall of the fuel line ( 13) releases an annular gap (32).
3. Verteiler nach Anspruch 2, dadurch gekennzeichnet, daß ° innerhalb der Kraftstoffleitung (13) eine zweite3. Distributor according to claim 2, characterized in that ° within the fuel line (13) a second
Kraftstoffleitung (14) verläuft, wobei die eine Kraftstoffleitung (13) der KraftstoffZuführung zu und die andere Kraftstoffleitung (14) der Kraftstoffrückführung von den 5 Kraftstoffeinspritzventilen (10) dient, und daß die Scheiben (30)- auf der zweiten Kraftstoffleitung (14) befestigt sind.Fuel line (14) runs, one fuel line (13) for the fuel supply and the other fuel line (14) for the fuel return from the 5 fuel injection valves (10), and that the disks (30) - on the second fuel line (14) are.
4. Verteiler nach Anspruch 3, dadurch gekennzeichnet, daß die zweite Kraftstoffleitung (14) ein von der Kreisform abweichendes Querschnittsprofil aufweist, dessen eine Abmessung größer ist als die dazu rechtwinklige Abmessung, und daß die Scheibe (30) eine zentrale Öffnung (31) mit etwa gleichem, jedoch um 90° verdrehten Öffnungsprofil aufweist, so daß die Scheibe (30) auf die 5 zweite Kraftstoffleitung (14) aufgeschoben werden kann und nach 90° Drehung kraftschlüssig gehalten wird.4. Distributor according to claim 3, characterized in that the second fuel line (14) has a cross-sectional profile deviating from the circular shape, one dimension of which is larger than the dimension at right angles thereto, and in that the disc (30) has a central opening (31) has approximately the same, but rotated by 90 ° opening profile, so that the disc (30) on the 5 second fuel line (14) can be pushed and held non-positively after 90 ° rotation.
5. Verteiler nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die beiden Kraftstoffleitungen (13,14) über ein im Verteilergehäuse (11) angeordnetes Druckregelventil (15) miteinander verbunden sind und daß jede Kraftstoffleitung (13,14) an ihrem freien Ende mit einem am Verteilergehäuse (11) vorstehenden Anschlußstutzen (16,17) verbunden ist. 5. Distributor according to claim 3 or 4, characterized in that the two fuel lines (13, 14) are connected to one another via a pressure control valve (15) arranged in the distributor housing (11) and that each fuel line (13, 14) is at its free end is connected to a connecting piece (16, 17) projecting from the distributor housing (11).
EP90904598A 1989-05-02 1990-03-23 Fuel distributor for fuel injection systems in internal combustion engines Expired - Lifetime EP0426780B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3914487A DE3914487A1 (en) 1989-05-02 1989-05-02 FUEL DISTRIBUTOR FOR FUEL INJECTION SYSTEMS OF INTERNAL COMBUSTION ENGINES
DE3914487 1989-05-02

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EP0426780A1 true EP0426780A1 (en) 1991-05-15
EP0426780B1 EP0426780B1 (en) 1993-06-02

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Application Number Title Priority Date Filing Date
EP90904598A Expired - Lifetime EP0426780B1 (en) 1989-05-02 1990-03-23 Fuel distributor for fuel injection systems in internal combustion engines

Country Status (7)

Country Link
US (1) US5143039A (en)
EP (1) EP0426780B1 (en)
JP (1) JPH04500112A (en)
KR (1) KR920700347A (en)
BR (1) BR9006752A (en)
DE (2) DE3914487A1 (en)
WO (1) WO1990013741A1 (en)

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Also Published As

Publication number Publication date
EP0426780B1 (en) 1993-06-02
DE59001612D1 (en) 1993-07-08
US5143039A (en) 1992-09-01
DE3914487A1 (en) 1990-11-08
WO1990013741A1 (en) 1990-11-15
KR920700347A (en) 1992-02-19
JPH04500112A (en) 1992-01-09
BR9006752A (en) 1991-08-06

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