EP0423466B1 - Fuel distributor for an internal combustion engine - Google Patents

Fuel distributor for an internal combustion engine Download PDF

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Publication number
EP0423466B1
EP0423466B1 EP90116344A EP90116344A EP0423466B1 EP 0423466 B1 EP0423466 B1 EP 0423466B1 EP 90116344 A EP90116344 A EP 90116344A EP 90116344 A EP90116344 A EP 90116344A EP 0423466 B1 EP0423466 B1 EP 0423466B1
Authority
EP
European Patent Office
Prior art keywords
distributor housing
fuel distributor
fuel
ducts
receiving means
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
EP90116344A
Other languages
German (de)
French (fr)
Other versions
EP0423466A1 (en
Inventor
Alfred Koch
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 EP0423466A1 publication Critical patent/EP0423466A1/en
Application granted granted Critical
Publication of EP0423466B1 publication Critical patent/EP0423466B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D9/00Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/109Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps having two or more flaps
    • F02D9/1095Rotating on a common axis, e.g. having a common shaft
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/16Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18Multi-cylinder engines
    • F02B75/22Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D9/00Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035Details of the valve housing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D9/00Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1065Mechanical control linkage between an actuator and the flap, e.g. including levers, gears, springs, clutches, limit stops of the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10006Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10078Connections of intake systems to the engine
    • F02M35/10085Connections of intake systems to the engine having a connecting piece, e.g. a flange, between the engine and the air intake being foreseen with a throttle valve, fuel injector, mixture ducts or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10209Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10216Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10242Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10255Arrangements of valves; Multi-way valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/1034Manufacturing and assembling intake systems
    • F02M35/10354Joining multiple sections together
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/104Intake manifolds
    • F02M35/108Intake manifolds with primary and secondary intake passages
    • F02M35/1085Intake manifolds with primary and secondary intake passages the combustion chamber having multiple intake valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/104Intake manifolds
    • F02M35/116Intake manifolds for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10314Materials for intake systems
    • F02M35/10321Plastics; Composites; Rubbers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/1034Manufacturing and assembling intake systems
    • F02M35/10347Moulding, casting or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/08Thermoplastics

Definitions

  • EP-0 314 074 A1 discloses an internal combustion engine with a fuel distributor housing, which extends in the longitudinal direction of the internal combustion engine and is arranged between the inlet ducts of a cylinder head and an air collector having suction lines.
  • This distributor housing has a flow for supply and a return for the removal of fuel, receptacles for injectors and rotary flaps arranged in channels, the receptacles opening into these channels, which are located between an upper and a lower side of the distributor housing transversely to the flow and to extend the return and can be locked with the rotary flaps.
  • the object of the present invention is to provide a compact fuel distributor housing which makes optimal use of the available installation space, is easy and inexpensive to produce and enables time-saving and cost-saving installation.
  • This internal combustion engine has a fuel distributor housing designed as a lower part of an air collector and advantageously integrates sections of the suction lines running to the inlet ducts arranged in the cylinder head, throttle bodies for shutting off these ducts, all lines necessary for supplying and removing fuel, and receptacles for into the fuel distributor housing insertable injectors.
  • This fuel distributor housing has a compact shape and is particularly advantageous to be arranged in the space available in the V of an internal combustion engine with a V-shaped cylinder arrangement.
  • the channels running vertically between the upper part of the air collector and the lower side of the fuel distributor housing are combined in two rows which form the outer, longitudinally extending edges of the fuel distributor housing. In the middle between these and parallel to it, a flow leading to the supply of fuel runs adjacent to the underside. On both sides, equally spaced from the flow and adjacent to the top, there is a return assigned to a row for the removal of fuel.
  • the flow and return are each connected by a flat rib, in which the receptacles for the injection valves are integrated.
  • the fuel distributor housing thus has a V-shaped cross section between the vertical rows of the channels and makes optimal use of the installation space located between the rows.
  • the V-shaped design and an additional ribbing on the top and bottom make the fuel rail housing insensitive to the thermal mechanical stresses in the V of the internal combustion engine.
  • the integration of the high-frequency injection valves in a central area of a rigid housing significantly reduces the sound radiation.
  • the two rows have a longitudinal offset from one another which corresponds to the offset of the two rows of cylinders of a V-type internal combustion engine from one another.
  • the area created by the longitudinal offset is used at one end of the fuel rail by a bracket for a fuel pressure regulator.
  • the fuel distributor housing is cooled by the amount of fuel flowing twice along its longitudinal extent through forward and return.
  • the fuel distributor housing according to the invention makes the separately used separate components for supplying and removing fuel and their fastening elements superfluous. Furthermore, the fuel distributor housing can be produced in one piece as a lightweight sand casting or die-cast part made of aluminum in large numbers at low cost, machinable and easy to assemble. Before assembly, the fuel distributor housing can be subjected to a leak test when fully assembled. It avoids from the outset the effort that usually arises during the rework by renewed removal and installation.
  • An air collector 1 of a 6-cylinder V-internal combustion engine (not shown in more detail) with four valves per cylinder consists of an only indicated upper part 2 and a lower part 4 which acts simultaneously as a fuel distributor housing 3.
  • Suction lines 7 consisting of first sections 5 and second sections 6 execute an air flow the upper part 2 to the inlet ducts 8 arranged in the cylinder heads.
  • the second sections 6 run in the fuel distributor housing 3 between its top 9 and bottom 10 as ducts 11. These ducts 11 are combined in rows 12, 13 running parallel to one another, the rows 12, 13 form the outer, longitudinal edges 14 of the fuel rail housing 3.
  • a supply line 15 for the supply of fuel is equally spaced on both sides to the supply line 15 and adjacent to the top side 9, a return line 16 runs along each row 12, 13 for removing fuel.
  • a flat rib 17 extends along the fuel distributor housing 3 between each return 16 and the feed 15.
  • the fuel distributor housing 3 thus has an M-shaped shape transversely to its longitudinal extent, due to the vertical configuration as the edge 14 standing rows 12, 13 and the ribs 17 which are arranged between them and are in a V-shape.
  • the rows 12, 13 have a longitudinal offset L with respect to the longitudinal extent of the fuel distributor housing 3, as can be seen from FIGS. 1 and 2.
  • the longitudinal offset L corresponds approximately to the outer diameter DA of a channel 11.
  • one channel 11 of a pair 20 can be shut off via a rotary flap 21 for controlling the air flow led to the inlet channels 8.
  • the rotary flaps 21 of a row 12, 13 are arranged on a common axis 22.
  • the axes 22 penetrate all channels 11 of the rows 12, 13 in the middle.
  • the adjustment of all rotary flaps 21 takes place synchronously in a known manner via an actuating mechanism 23, consisting of a pressure cell 24 and a linkage 25 acting on both axes 22, which is not discussed in detail and which is fastened to one end 26 of the fuel distributor housing 3.
  • the supply of fuel takes place via a bore 27 running vertically from above into the feed 15 at the end 26 of the fuel distributor housing 3.
  • Each pair 20 is assigned a receptacle 28 for an injection valve, these receptacles 28 penetrating the ribs 17 almost vertically and with a lower one Opening 29 opens obliquely in the area of underside 10 into channel 11 of pair 20, which has no rotary flap 21.
  • the two receptacles 28 ', which are adjacent to the side opposite the end 26, are connected to the lead 15 via short bores 30 running perpendicular to the lead 15.
  • the receptacles 28 are arranged with respect to the returns 16 such that each return 16 tangentially intersects the receptacles 28 of a row 12, 13, as can be seen in FIG.
  • a vertically running holder 36 for a fuel pressure regulator 37 (FIG. 3) is arranged in the row 12.
  • a bore, essentially transversely in the fuel distributor housing 3 extending line 38 is arranged so that it connects both returns 16 and the bracket 36 together.
  • the line 38 cuts the holder 36 tangentially (FIG. 6).
  • the inner contour of the channels 11 widens conically from a first diameter D1 located in the underside 10 in the direction of the top side 9 to a diameter D2. Adjoining this, the inner contour has a cylindrical region 39 with the diameter D2, through which the axis 22 penetrates in the center.
  • the inner contour widens over a step 40 into a cylindrical section 41 with the diameter D3 leading to the upper side 9.
  • the expansion of the channels 11 in the area of the axes 22 is necessary in order to compensate for the cross-sectional area of the channels 11 that is otherwise reduced by the axes 22.
  • a bushing 42 is inserted which is supported on the step 40 and whose cylindrical outer surface has the diameter D3 and whose conical inner surface widens from the diameter D1 lying in the upper side 9 to the diameter D2 of the region 39.
  • the use of the bushings 42 enables the inner contour of the channels 11 to be designed in accordance with the casting and the necessary expansion of the diameter of the sections 41 from D1 to D2 does not have to be carried out by means of a complex, conical design.
  • Whistles 43 for receiving screws are cast onto the fuel distributor housing 3 along the rows 12, 13 and are used to fasten the fuel distributor housing 3 to the internal combustion engine.
  • Transverse ribs 44 for stiffening the fuel rail housing 3 are arranged between the rows 12, 13 on the top 9 and the bottom 10.
  • the fuel rail housing 3 is made in one piece by sand casting or die casting and can be processed automatically in a few steps.
  • the ends of the forward and return runs 15, 16, the bores for the axles 22 and the line 38, which are open after the drilling, are closed with plugs 45.
  • the fuel circulates in each case in the ring ducts of the injection valves and is around them Required amount reduced via the respective return 16 of the next receptacle 28.
  • the excess portion of the fuel is supplied to the fuel pressure regulator 37 in the holder 36 by means of the line 38.
  • the fuel released by the fuel pressure regulator 37 is discharged via a central bore 46 and a connecting piece 47 arranged on the underside 10 of the fuel distributor housing 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Description

Die Erfindung betrifft eine Brennkraftmaschine gemäß dem Oberbegriff des Anspruches 1.
Aus der EP-0 314 074 Al ist eine Brennkraftmaschine mit einem Kraftstoffverteilergehäuse bekannt, welches sich zwischen Einlaßkanälen eines Zylinderkopfes und einem Saugleitungen aufweisenden Luftsammler angeordnet in Längsrichtung der Brennkraftmaschine erstreckt. Dieses Verteilergehäuse weist einen Vorlauf zur Zufuhr und einen Rücklauf zur Abfuhr von Kraftstoff, Aufnahmen für Einspritzventile sowie in Kanälen angeordnete Drehklappen auf, wobei die Aufnahmen in diese Kanäle münden, welche sich zwischen einer Ober- und einer Unterseite des Verteilergehäuses quer zu dem Vorlauf und zu dem Rücklauf erstrecken und mit den Drehklappen absperrbar sind.
The invention relates to an internal combustion engine according to the preamble of claim 1.
EP-0 314 074 A1 discloses an internal combustion engine with a fuel distributor housing, which extends in the longitudinal direction of the internal combustion engine and is arranged between the inlet ducts of a cylinder head and an air collector having suction lines. This distributor housing has a flow for supply and a return for the removal of fuel, receptacles for injectors and rotary flaps arranged in channels, the receptacles opening into these channels, which are located between an upper and a lower side of the distributor housing transversely to the flow and to extend the return and can be locked with the rotary flaps.

Aufgabe der vorliegenden Erfindung ist es, ein kompaktes Kraftstoffaerteilergehäuse zu schaffen, welches vorhandenen Bauraum optimal nutzt, leicht und kostengünstig herstellbar ist sowie eine zeit- und kostensparende Montage ermöglicht.The object of the present invention is to provide a compact fuel distributor housing which makes optimal use of the available installation space, is easy and inexpensive to produce and enables time-saving and cost-saving installation.

Die Lösung dieser Aufgabe gelingt durch Anwendung der im Hauptanspruch angegebenen Merkmale. Weitere vorteilhafte Merkmale sind in den Unteranspüchen benannt.
Diese Brennkraftmaschine weist ein als Unterteil eines Luftsammlers ausgebildetes Kraftstoffverteilergehäuse auf und integriert dabei vorteilhafterweise als Kanäle verlaufende Abschnitte der zu den im Zylinderkopf angeordneten Einlaßkanälen verlaufenden Saugleitungen, Drosselorgane zum Absperren dieser Kanäle, sämtliche zur Zufuhr und Abfuhr von Kraftstoff erforderlichen Leitungen sowie Aufnahmen für in das Kraftstoffaerteilergehäuse einsteckbare Einspritzventile.
This problem is solved by applying the features specified in the main claim. Further advantageous features are named in the subclaims.
This internal combustion engine has a fuel distributor housing designed as a lower part of an air collector and advantageously integrates sections of the suction lines running to the inlet ducts arranged in the cylinder head, throttle bodies for shutting off these ducts, all lines necessary for supplying and removing fuel, and receptacles for into the fuel distributor housing insertable injectors.

Dieses Kraftstoffverteilergehäuse weist eine kompakte Form auf und ist besonders vorteilhaft in dem im V einer Brennkraftmaschine mit V-förmiger Zylinderanordnung vorhanden Bauraum anzuordnen. Die vertikal zwischen der dem Oberteil des Luftsammlers zugewandten Oberseite und der Unterseite des Kraftstoffverteilergehäuses verlaufenden Kanäle sind in zwei Reihen zusammengefaßt, die die äußeren, in Längserstreckung verlaufenden Berandungen des Kraftstoffverteilergehäuses bilden. Mittig zwischen diesen und parallel dazu verläuft benachbart der Unterseite ein der Zufuhr von Kraftstoff dienender Vorlauf. Beidseitig gleich beabstandet zum Vorlauf und benachbart der Oberseite verläuft jeweils ein einer Reihe zugeordneter Rücklauf zur Abfuhr von Kraftstoff.
Vorlauf und Rücklauf sind jeweils über eine flächige Rippe miteinander verbunden, in denen die Aufnahmen für die Einspritzventile integriert sind. Das Kraftstoffverteilergehäuse weist somit im querschnitt zwischen den vertikalen Reihen der Kanäle eine V-förmige Gestalt auf und nutzt den zwischen den Reihen befindlichen Bauraum optimal aus.
Die V-förmige Gestalt und eine zusätzliche, auf der Ober- und Unterseite angebrachte Verrippung macht das Kraftstoffverteilergehäuse unempfindlich gegenüber den thermisch bedingten, mechanischen Spannungen im V der Brennkraftmaschine.
Die Integration der mit hoher Frequenz arbeitenden Einspritzventile in einen zentralen Bereich eines steifen Gehäuses reduziert die Schallabstrahlung deutlich.
Gemäß der Ansprüche 4 und 5 weisen die beiden Reihen einen Längsversatz zueinander auf, der dem Versatz der beiden Zylinderreihen einer V-Brennkraftmaschine zueinander entspricht. Der durch den Längsversatz entstehende Bereich wird an einem Ende des Kraftstoffverteilergehäuses durch eine Halterung für einen Kraftstoffdruckregler genutzt.
Das Kraftstoffverteilergehäuse wird durch die zweimal entlang seiner Längserstreckung durch Vor- und Rücklauf fließende Kraftstoffmenge gekühlt. Das erfindungsgemäße Kraftstoffverteilergehäuse macht die üblicherweise verwendeten separaten Bauteile zur Zu- und Abfuhr von Kraftstoff sowie deren Befestigungselemente überflüssig. Weiterhin ist das Kraftstoffverteilergehäuse einteilig als leichtgewichtiges Sandguß- oder Druckgußteil aus Aluminium in großen Stückzahlen kostengünstig herstellbar, maschinell bearbeitbar und leicht zu montieren. Vor der Montage kann das Kraftstoffverteilergehäuse vollständig bestückt einer Dichtigkeitsprüfung unterzogen werden. Es vermeidet somit von vornherein den Aufwand, der üblicherweise bei der Nachbesserung durch erneuten Aus- und Einbau entsteht.
This fuel distributor housing has a compact shape and is particularly advantageous to be arranged in the space available in the V of an internal combustion engine with a V-shaped cylinder arrangement. The channels running vertically between the upper part of the air collector and the lower side of the fuel distributor housing are combined in two rows which form the outer, longitudinally extending edges of the fuel distributor housing. In the middle between these and parallel to it, a flow leading to the supply of fuel runs adjacent to the underside. On both sides, equally spaced from the flow and adjacent to the top, there is a return assigned to a row for the removal of fuel.
The flow and return are each connected by a flat rib, in which the receptacles for the injection valves are integrated. The fuel distributor housing thus has a V-shaped cross section between the vertical rows of the channels and makes optimal use of the installation space located between the rows.
The V-shaped design and an additional ribbing on the top and bottom make the fuel rail housing insensitive to the thermal mechanical stresses in the V of the internal combustion engine.
The integration of the high-frequency injection valves in a central area of a rigid housing significantly reduces the sound radiation.
According to claims 4 and 5, the two rows have a longitudinal offset from one another which corresponds to the offset of the two rows of cylinders of a V-type internal combustion engine from one another. The area created by the longitudinal offset is used at one end of the fuel rail by a bracket for a fuel pressure regulator.
The fuel distributor housing is cooled by the amount of fuel flowing twice along its longitudinal extent through forward and return. The fuel distributor housing according to the invention makes the separately used separate components for supplying and removing fuel and their fastening elements superfluous. Furthermore, the fuel distributor housing can be produced in one piece as a lightweight sand casting or die-cast part made of aluminum in large numbers at low cost, machinable and easy to assemble. Before assembly, the fuel distributor housing can be subjected to a leak test when fully assembled. It avoids from the outset the effort that usually arises during the rework by renewed removal and installation.

Zur weiteren Reduzierung des Gewichtes oder bei Verwendung von gegenüber Aluminium aggressiven Kraftstoffqualitäten ist das gesamte Kraftstoffverteilergehäuse auch aus Kunststoff herstellbar.
Ein vorteilhaftes Ausführungsbeispiel der Erfindung im folgenden näher erläutert.
Es zeigt

Fig.1
eine Draufsicht eines Kraftstoffverteilergehäuses,
Fig.2
eine Ansicht des Kraftstoffverteilergehäuses von unten,
Fig.3
eine Ansicht des Richtungspfeiles R gemäß Fig. 1,
Fig.4
ein Schnitt entlang der Linie IV - IV gemäß Fig.1,
Fig.5
ein Schnitt entlang der Linie V - V gemäß Fig.1,
Fig.6
ein Schnitt entlang der Linie VI - VI gemäß Fig.1,
Fig.7
eine Ansicht des Richtungspfeiles X gemäß Fig.1
To further reduce the weight or when using fuel qualities that are aggressive towards aluminum, the entire fuel distributor housing can also be made of plastic.
An advantageous embodiment of the invention is explained in more detail below.
It shows
Fig. 1
a plan view of a fuel rail housing,
Fig. 2
a view of the fuel rail housing from below,
Fig. 3
2 shows a view of the directional arrow R according to FIG. 1,
Fig. 4
2 shows a section along the line IV-IV according to FIG. 1,
Fig. 5
2 shows a section along the line V - V according to FIG. 1,
Fig. 6
2 shows a section along the line VI-VI according to FIG. 1,
Fig. 7
a view of the direction arrow X according to Fig.1

Ein Luftsammler 1 einer nicht näher gezeigten 6-zylindrigen V-Brennkraftmaschine mit vier Ventilen pro Zylinder besteht aus einem nur angedeuteten Oberteil 2 und einem gleichzeitig als Kraftstoffverteilergehäuse 3 wirkenden Unterteil 4. Aus ersten Abschnitten 5 und zweiten Abschnitten 6 bestehende Saugleitungen 7 führen einen Luftstrom aus dem Oberteil 2 zu den in den Zylinderköpfen angeordneten Einlaßkanälen 8. Die zweiten Abschnitte 6 verlaufen im Kraftstoffverteilergehäuse 3 zwischen dessen Oberseite 9 und Unterseite 10 als Kanäle 11. Diese Kanäle 11 sind in Reihen 12,13 parallel zueinander verlaufend zusammengefaßt, wobei die Reihen 12,13 die äußeren, längsverlaufenden Berandungen 14 des Kraftstoffverteilergehäuses 3 bilden. Zwischen den Reihen 12,13 verläuft mittig und eng benachbart der Unterseite 10 ein der Zufuhr von Kraftstoff dienenden Vorlauf 15. Beidseitig gleich beabstandet zum Vorlauf 15 und benachbart der Oberseite 9 verläuft entlang jeder Reihe 12,13 ein Rücklauf 16 zur Abfuhr von Kraftstoff. Zwischen jedem Rücklauf 16 und dem Vorlauf 15 erstreckt sich längs des Kraftstoffverteilergehäuses 3 eine flächige Rippe 17.
Das Kraftstoffverteilergehäuse 3 weist somit quer zu seiner Längserstreckung eine M-förmige Gestalt auf, bedingt durch die als Berandung 14 vertikal stehenden Reihen 12,13 und die dazwischen angeordneten, V-förmig zueinander stehenden Rippen 17.
An air collector 1 of a 6-cylinder V-internal combustion engine (not shown in more detail) with four valves per cylinder consists of an only indicated upper part 2 and a lower part 4 which acts simultaneously as a fuel distributor housing 3. Suction lines 7 consisting of first sections 5 and second sections 6 execute an air flow the upper part 2 to the inlet ducts 8 arranged in the cylinder heads. The second sections 6 run in the fuel distributor housing 3 between its top 9 and bottom 10 as ducts 11. These ducts 11 are combined in rows 12, 13 running parallel to one another, the rows 12, 13 form the outer, longitudinal edges 14 of the fuel rail housing 3. Between the rows 12, 13 runs in the middle and closely adjacent to the underside 10, a supply line 15 for the supply of fuel, equally spaced on both sides to the supply line 15 and adjacent to the top side 9, a return line 16 runs along each row 12, 13 for removing fuel. A flat rib 17 extends along the fuel distributor housing 3 between each return 16 and the feed 15.
The fuel distributor housing 3 thus has an M-shaped shape transversely to its longitudinal extent, due to the vertical configuration as the edge 14 standing rows 12, 13 and the ribs 17 which are arranged between them and are in a V-shape.

Entlang der Reihen 12,13 sind jeweils zwei Kanäle 11 zu insgesamt drei Paaren 20 zusammengefaßt, wobei jeweils ein Paar 20 einem Zylinder der Brennkraftmaschine zugeordnet ist. Aufgrund des Versatzes der beiden Zylinderreihen in Längsrichtung der Brennkraftmaschine weisen die Reihen 12,13 einen Längsversatz L bezüglich der Längserstreckung des Kraftstoffverteilergehäuses 3 auf, wie aus Fig.1 und 2 ersichtlich. Der Längsversatz L entspricht ungefähr dem äußeren Durchmesser DA eines Kanales 11.Along the rows 12, 13, two channels 11 are combined to form a total of three pairs 20, one pair 20 each being assigned to a cylinder of the internal combustion engine. Due to the offset of the two rows of cylinders in the longitudinal direction of the internal combustion engine, the rows 12, 13 have a longitudinal offset L with respect to the longitudinal extent of the fuel distributor housing 3, as can be seen from FIGS. 1 and 2. The longitudinal offset L corresponds approximately to the outer diameter DA of a channel 11.

Jeweils ein Kanal 11 eines Paares 20 ist über eine Drehklappe 21 zur Steuerung des zu den Einlaßkanälen 8 geführten Luftstromes absperrbar. Die Drehklappen 21 einer Reihe 12,13 sind auf einer gemeinsamen Achse 22 angeordnet. Die Achsen 22 durchdringen mittig alle Kanäle 11 der Reihen 12,13. Die Verstellung aller Drehklappen 21 erfolgt synchron in bekannter Weise über einen Betätigungsmechanismus 23, bestehend aus einer Druckdose 24 und einem auf beide Achsen 22 wirkenden Gestänge 25, auf den nicht näher eingegangen wird und der an einem Ende 26 des Kraftstoffverteilergehäuses 3 befestigt ist.In each case one channel 11 of a pair 20 can be shut off via a rotary flap 21 for controlling the air flow led to the inlet channels 8. The rotary flaps 21 of a row 12, 13 are arranged on a common axis 22. The axes 22 penetrate all channels 11 of the rows 12, 13 in the middle. The adjustment of all rotary flaps 21 takes place synchronously in a known manner via an actuating mechanism 23, consisting of a pressure cell 24 and a linkage 25 acting on both axes 22, which is not discussed in detail and which is fastened to one end 26 of the fuel distributor housing 3.

Die Zufuhr von Kraftstoff erfolgt über eine senkrecht von oben in den Vorlauf 15 verlaufende Bohrung 27 am Ende 26 des Kraftstoffverteilergehäuses 3. Jedem Paar 20 ist eine Aufnahme 28 für ein Einspritzventil zugeordnet, wobei diese Aufnahmen 28 die Rippen 17 nahezu senkrecht durchdringen und mit einer unteren Öffnung 29 schräg im Bereich der Unterseite 10 in den Kanal 11 des Paares 20 münden, der keine Drehklappe 21 aufweist. Die beiden Aufnahmen 28', die der dem Ende 26 gegenüberliegenden Seite benachbart sind, stehen über kurze, senkrecht zum Vorlauf 15 verlaufende Bohrungen 30 mit dem Vorlauf 15 in Verbindung. Die Aufnahmen 28 sind bezüglich der Rückläufe 16 so angeordnet, daß jeder Rücklauf 16 die Aufnahmen 28 einer Reihe 12,13 tangential schneidet, wie aus Figur 4 ersichtlich.The supply of fuel takes place via a bore 27 running vertically from above into the feed 15 at the end 26 of the fuel distributor housing 3. Each pair 20 is assigned a receptacle 28 for an injection valve, these receptacles 28 penetrating the ribs 17 almost vertically and with a lower one Opening 29 opens obliquely in the area of underside 10 into channel 11 of pair 20, which has no rotary flap 21. The two receptacles 28 ', which are adjacent to the side opposite the end 26, are connected to the lead 15 via short bores 30 running perpendicular to the lead 15. The receptacles 28 are arranged with respect to the returns 16 such that each return 16 tangentially intersects the receptacles 28 of a row 12, 13, as can be seen in FIG.

In einem am Ende 26 des Kraftstoffverteilergehäuses 3 durch den Längsversatz L entstehenden Bereich 35 ist eine vertikal verlaufende Halterung 36 für einen Kraftstoffdruckregler 37 (Fig. 3) in der Reihe 12 angeordnet. Eine als Bohrung ausgeführte, im wesentlichen quer im Kraftstoffverteilergehäuse 3 verlaufende Leitung 38 ist so angeordnet, daß sie beide Rückläufe 16 und die Halterung 36 miteinander verbindet. Die Leitung 38 schneidet dabei die Halterung 36 tangential an (Fig.6).
Wie aus Figur 4 ersichtlich ist, erweitert sich die Innenkontur der Kanäle 11 von einem ersten, in der Unterseite 10 liegenden Durchmesser D1 aus in Richtung auf die Oberseite 9 konisch auf einen Durchmesser D2. Daran anschließend weist die Innenkontur einen zylindrischen Bereich 39 mit dem Durchmesser D2 auf, der mittig von der Achse 22 durchdrungen wird. Oberhalb des Bereiches 39 erweitert sich die Innenkontur über eine Stufe 40 in einen bis zur Oberseite 9 führenden, zylindrischen Abschnitt 41 mit dem Durchmesser D3.
Die Erweiterung der Kanäle 11 im Bereich der Achsen 22 ist erforderlich, um die ansonsten durch die Achsen 22 verringerte Querschnittsfläche der Kanäle 11 zu kompensieren. In den Abschnitt 41 ist eine Buchse 42 eingesetzt die sich auf der Stufe 40 abstützt und deren zylindrische Außenfläche den Durchmesser D3 aufweist und deren konische Innenfläche sich von dem in der Oberseite 9 liegenden Durchmesser D1 bis auf den Durchmesser D2 des Bereiches 39 erweitert.
Durch die Verwendung der Buchsen 42 ist eine gußgerechte Gestaltung der Innenkontur der Kanäle 11 möglich und die notwendige Erweiterung des Durchmessers der Abschnitte 41 von D1 auf D2 muß nicht durch eine aufwendige, konische Gestaltung erfolgen.
In a region 35 formed at the end 26 of the fuel distributor housing 3 by the longitudinal offset L, a vertically running holder 36 for a fuel pressure regulator 37 (FIG. 3) is arranged in the row 12. A bore, essentially transversely in the fuel distributor housing 3 extending line 38 is arranged so that it connects both returns 16 and the bracket 36 together. The line 38 cuts the holder 36 tangentially (FIG. 6).
As can be seen from FIG. 4, the inner contour of the channels 11 widens conically from a first diameter D1 located in the underside 10 in the direction of the top side 9 to a diameter D2. Adjoining this, the inner contour has a cylindrical region 39 with the diameter D2, through which the axis 22 penetrates in the center. Above the area 39, the inner contour widens over a step 40 into a cylindrical section 41 with the diameter D3 leading to the upper side 9.
The expansion of the channels 11 in the area of the axes 22 is necessary in order to compensate for the cross-sectional area of the channels 11 that is otherwise reduced by the axes 22. In the section 41, a bushing 42 is inserted which is supported on the step 40 and whose cylindrical outer surface has the diameter D3 and whose conical inner surface widens from the diameter D1 lying in the upper side 9 to the diameter D2 of the region 39.
The use of the bushings 42 enables the inner contour of the channels 11 to be designed in accordance with the casting and the necessary expansion of the diameter of the sections 41 from D1 to D2 does not have to be carried out by means of a complex, conical design.

Entlang der Reihen 12,13 sind Pfeifen 43 zur Aufnahme von Schrauben an das Kraftstoffverteilergehäuse 3 angegossen, mit denen das Kraftstoffverteilergehäuse 3 an der Brennkraftmaschine befestigt wird. Zwischen den Reihen 12,13 auf der Oberseite 9 und der Unterseite 10 sind quer verlaufende Rippen 44 zur Aussteifung des Kraftstoffverteilergehäuses 3 angeordnet. Das Kraftstoffverteilergehäuse 3 ist einteilig im Sandguß- oder Druckgußverfahren hergestellt und in wenigen Schritten automatisch zu bearbeiten. Die nach dem Bohren offenen Enden der Vor- und Rückläufe 15,16, der Bohrungen für die Achsen 22 sowie der Leitung 38 sind mit Stopfen 45 verschlossen.Whistles 43 for receiving screws are cast onto the fuel distributor housing 3 along the rows 12, 13 and are used to fasten the fuel distributor housing 3 to the internal combustion engine. Transverse ribs 44 for stiffening the fuel rail housing 3 are arranged between the rows 12, 13 on the top 9 and the bottom 10. The fuel rail housing 3 is made in one piece by sand casting or die casting and can be processed automatically in a few steps. The ends of the forward and return runs 15, 16, the bores for the axles 22 and the line 38, which are open after the drilling, are closed with plugs 45.

Im Betrieb der Brennkraftmaschine wird von den Zylindern der Brennkraftmaschine ein Luftstrom aus dem Oberteil 2 des Luftsammlers 1 über die ersten Abschnitte 5 der Saugleitungen 7 und die zweiten Abschnitte 6 im Kraftstoffverteilergehäuse 3 und von dort durch die Einlaßkanäle 8 in die Brennkammern der Zylinder gesaugt.
Kraftstoff wird unter Druck mittels der Bohrung 27 in den Vorlauf 15 eingespeist und strömt entlang des Vorlaufes 15 über die Bohrungen 30 zu den nicht gezeigten Einspritzventilen in den Aufnahmen 28'. Der nicht von den in den Aufnahmen 28' angeordneten Einspritzventilen benötigte, überschüssige Anteil des Kraftstoffes wird über an den Einspritzventilen angeordnete Ringkanäle zu den Rückläufen 16 geleitet und strömt zu den übrigen Aufnahmen 28. Der Kraftstoff zirkuliert jeweils in den Ringkanälen der Einspritzventile und wird um die benötigte Menge reduziert über den jeweiligen Rücklauf 16 der nächsten Aufnahme 28 zugeführt. Am vorderen Ende 26 des Kraftstoffverteilergehäuses 3 wird mittels der Leitung 38 der überschüssige Anteil des Kraftstoffes dem Kraftstoffdruckregler 37 in der Halterung 36 zugeführt. Der vom Kraftstoffdruckregler 37 freigegebene Kraftstoff wird über eine zentrale Bohrung 46 und einen an der Unterseite 10 des Kraftstoffverteilergehäuses 3 angeordneten Stutzen 47 abgeführt.
During the operation of the internal combustion engine, an air flow from the upper part 2 of the air collector 1 via the first sections 5 of the suction lines 7 and the second sections 6 is generated by the cylinders of the internal combustion engine Fuel distributor housing 3 and sucked from there through the inlet channels 8 into the combustion chambers of the cylinders.
Fuel is fed into the feed 15 under pressure by means of the bore 27 and flows along the feed 15 via the bores 30 to the injection valves (not shown) in the receptacles 28 '. The excess portion of the fuel that is not required by the injection valves arranged in the receptacles 28 'is conducted to the returns 16 via ring ducts arranged on the injection valves and flows to the other receptacles 28. The fuel circulates in each case in the ring ducts of the injection valves and is around them Required amount reduced via the respective return 16 of the next receptacle 28. At the front end 26 of the fuel distributor housing 3, the excess portion of the fuel is supplied to the fuel pressure regulator 37 in the holder 36 by means of the line 38. The fuel released by the fuel pressure regulator 37 is discharged via a central bore 46 and a connecting piece 47 arranged on the underside 10 of the fuel distributor housing 3.

Claims (9)

  1. An internal combustion engine with a fuel distributor housing (3) extending in the longitudinal direction of the internal combustion engine between a cylinder head with inlet ducts (8) and an air collector (1) with suction pipes (7), wherein the suction pipes (7) comprising first and second sections (5 and 6) guide a stream of air from the air collector (1) to the inlet ducts (8) in the cylinder head, and with a feed line (15) for fuel inflow, and a return line (16) for fuel outflow, and receiving means (28) for injection valves and also ducts (11), arranged in pairs, extending between an upper surface (9) and lower surface (10) of the fuel distributor housing (3), arranged transversely to the feed line (15) and return line (16), the receiving means (28) opening into unblockable ducts (11) in each pair (20), formed from the second sections (6), and the other duct (11) in each pair (20) being blockable with a throttle member (turning valve 21) characterised in that the fuel distributor housing (3) forms a lower section (4) for the air collector (1), and that the ducts (11) are arranged in parallel rows (12, 13) as external edges (14) running lengthways, a return line (16) associated with one of the rows (12, 13), the receiving means (28), and the feed line (15) close to the underside (10) extending respectively between each of the said ducts (11), the return lines (16) being connected via flat ribs (17) to the feed line (15) in such a way that the fuel distributor housing (3) substantially forms a V-shape transversely to its longitudinal direction between the rows (12, 13).
  2. An internal combustion engine according to claim 1, characterised in that the pairs (20) extend along the rows (12, 13) the turning valves (21) which work as throttle members being fixed on shafts (22) which are arranged parallel to the feed line (15) and which pass through all the ducts (11) of a row (12, 13).
  3. A fuel distributor housing (3) according to claim 1, characterised in that each pair (20) of ducts (11) has at least one receiving means (28), the receiving means (28) passing through the ribs (17) almost vertically, and lower openings (29) of the receiving means (28) in the region of the underside (10) open into the ducts (11).
  4. A fuel distributor housing (3) according to claim 1, characterised in that one of the rows (12, 13) opposite the other row (12, 13) has a longitudinal offset (L), the offset corresponding approximately to the external diameter (DA) of a duct (11).
  5. A fuel distributor housing (3) according to claim 4, characterised in that at one end (26) of the fuel distributor housing (3) in an area (35) created by the longitudinal offset (L) there is a holding device (36) for a fuel pressure regulator (37).
  6. A fuel distributor housing (3) according to claim 5, characterised in that a pipe (38), near to the end (26) and running substantially transversely in the fuel distributor housing (3), is arranged in such a way that it connects the return lines (16) to the holding device (36).
  7. A fuel distributor housing (3) according to claim 1, characterised in that the feed line (15) and return line (16) are constructed as bores, the return line (16) being arranged so as to intersect tangentially with the receiving means (28) and the feed line (15) is connected with the receiving means (28') via short bores (30) arranged vertically to the feed line (15).
  8. A fuel distributor housing (3) according to claim 2, characterised in that the inner surface of the ducts (11) extends conically outwards in the direction of the upper surface (9) from a first diameter (D1) in the lower surface (10), and has attached thereto a cylindrical area (39) of a diameter (D2) through which the shaft (22) passes, and the inner surface connected to the area (39) as far as the upper surface (9) extends into a cylindrical portion (41) of a diameter (D3).
  9. A fuel distributor housing (3) according to claim 8, characterised in that a sleeve (42) is inserted in the cylindrical portion (41) of the duct (11), the cylindrical outer surface of the sleeve having the diameter (D3), and its conical inner surface extending from the diameter (D1) in the upper surface (9) as far as the diameter (D2) adjacent to the area (39).
EP90116344A 1989-10-20 1990-08-27 Fuel distributor for an internal combustion engine Expired - Lifetime EP0423466B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3934906A DE3934906C1 (en) 1989-10-20 1989-10-20
DE3934906 1989-10-20

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EP0423466A1 EP0423466A1 (en) 1991-04-24
EP0423466B1 true EP0423466B1 (en) 1993-05-19

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EP90116344A Expired - Lifetime EP0423466B1 (en) 1989-10-20 1990-08-27 Fuel distributor for an internal combustion engine

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US (1) US5101792A (en)
EP (1) EP0423466B1 (en)
JP (1) JPH03151562A (en)
DE (2) DE3934906C1 (en)

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US5158045A (en) * 1992-02-05 1992-10-27 Siemens Automotive Limited Engine induction system having a telescopic throttle body
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JP2864365B2 (en) * 1996-04-16 1999-03-03 本田技研工業株式会社 Engine intake system
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JP4589276B2 (en) * 2006-08-07 2010-12-01 トヨタ自動車株式会社 Variable intake system for V-type internal combustion engine
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Also Published As

Publication number Publication date
JPH03151562A (en) 1991-06-27
DE59001488D1 (en) 1993-06-24
EP0423466A1 (en) 1991-04-24
DE3934906C1 (en) 1990-11-08
US5101792A (en) 1992-04-07

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