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EP1240423B1 - Piston engine - Google Patents

Piston engine Download PDF

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Publication number
EP1240423B1
EP1240423B1 EP00991771A EP00991771A EP1240423B1 EP 1240423 B1 EP1240423 B1 EP 1240423B1 EP 00991771 A EP00991771 A EP 00991771A EP 00991771 A EP00991771 A EP 00991771A EP 1240423 B1 EP1240423 B1 EP 1240423B1
Authority
EP
European Patent Office
Prior art keywords
piston engine
engine according
holding
engine block
inlet line
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
EP00991771A
Other languages
German (de)
French (fr)
Other versions
EP1240423A1 (en
Inventor
Ivano Morgillo
Jürgen Müller
Jochen Roos
Martin Rosenbecker
Günter KACHLER
Hans Gebert
Hans-Peter Drespling
Jürgen Stehlig
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.)
Mahle Filtersysteme GmbH
Original Assignee
Mahle Filtersysteme 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 Mahle Filtersysteme GmbH filed Critical Mahle Filtersysteme GmbH
Publication of EP1240423A1 publication Critical patent/EP1240423A1/en
Application granted granted Critical
Publication of EP1240423B1 publication Critical patent/EP1240423B1/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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air 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
    • F02M35/10078—Connections of intake systems to the engine
    • F02M35/10085—Connections 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
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10216—Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10255—Arrangements of valves; Multi-way valves
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1034—Manufacturing and assembling intake systems
    • F02M35/10347—Moulding, casting or the like
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/112—Intake manifolds for engines with cylinders all in one line
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders four
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1832—Number of cylinders eight
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/20—Multi-cylinder engines with cylinders all in one line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement

Definitions

  • the invention relates to a piston engine with the features of the preamble of claim 1, such as from the Document FR 2 779 681 A known.
  • a piston engine has an engine block with several cylinders and is equipped with a fresh gas supply, the several, assigned to the cylinders and on the engine block has specified feed pipes. About this fresh gas supply intake air or charge air is fed to the engine, which is needed for the combustion.
  • Modern piston engines are equipped with a fuel injection system that a high pressure supply line assigned to the cylinders having. In such a high pressure supply line the fuel under high pressure is common to the cylinders provided, using injectors a targeted metering of the fuel takes place.
  • Such one common high pressure supply line is generally referred to as "common rail".
  • the high pressure supply line is due to the high Fuel pressures are preferably made of metal.
  • the manufacture of the feed pipes becomes plastic prefers.
  • Establishing the plastic Feed pipes on the engine block are usually made using Metal bushings that are in a flange section of the feed pipes be welded or melted to the feed pipes to be able to screw on the engine block.
  • the high pressure supply line can then directly on the engine block or attached to the feed pipes and thus indirectly to the engine block become. It is also possible to use the feed pipes and to manufacture the high-pressure supply line in one piece from metal, this integral assembly then using a appropriate screw on the engine block becomes.
  • the present invention addresses the problem to design a piston engine of the type mentioned at the beginning, that the attachment of the high pressure supply line and of the feed pipes simplified.
  • the invention is based on the general idea of the high-pressure supply line to design so that these with the Feed pipes cooperates in that the Attachment of the high pressure supply line at the same time Feed pipes to be fixed on the engine block.
  • This Measure can use additional fasteners for fixing the supply pipes on the engine block are not required.
  • FIG. 1 and 2 is not otherwise piston engine shown equipped with a fresh gas supply, of which feed pipes 1 are shown here, the end of the fresh gas supply assigned to the engine represent and the fresh gas one cylinder each Feed the piston engine. Two adjacent to each other Feed pipes 1 are via a common connecting web 2 attached to each other.
  • the feed pipes 1 are preferably arranged in a row. Since four feed pipes 1 are shown here the associated piston engine accordingly as a four-cylinder in-line engine or designed as an eight-cylinder V-engine.
  • a bearing approach 3 On one of the outer feed pipes 1 is a bearing approach 3 molded.
  • a carrier 4 is formed on the other outside feed pipe 1.
  • the Feed pipes 1, the connecting webs 2, the bearing shoulder 3 and the carrier 4 combined into an injection molded component and preferably made of a suitable plastic.
  • the piston engine also has a fuel injection system, of which a high-pressure supply line 5 is shown here is the injection valves, not shown with connections 6 fueled. Because the fuel in the high pressure supply line 5 under a high working pressure stands, the high pressure supply line 5 is preferred in metal construction, in particular by a die casting process, manufactured.
  • a hold-down device 7 is formed for each feed pipe 1, which has a retaining ring 8.
  • Each of these retaining rings 8 is shaped so that the associated feed pipe 1 with an upper section 9 can be inserted therein and in an enlarged central section 10 comes into contact with it.
  • the inner contour of the retaining ring 8 expediently to the outer contour of the middle section 10 adapted so that there is a large area can form between the retaining ring 8 and the feed pipe 1.
  • the holding webs 11 and the connecting webs 2 prefers.
  • a plurality of support feet 12 are formed in the interior each have a through opening 13 for a screw.
  • the high pressure feed line 5, the hold-down 7 and the support feet 12 as one piece Component formed, for example, by a die casting process can be manufactured.
  • the Support feet 12 At her the not shown Engine block facing lower end have the Support feet 12 each have a support plate 14 on a Flange 17 comes to rest on that facing the engine block End of the feed pipes 1 is formed.
  • This Support plate 14 protrude downwards from cylinder liners 15, inserted into complementary receiving openings 30 in flange 17 become.
  • the cylinder liners 15 are dimensioned so that when screwing the support feet 12 to the engine block the support plates 14 a contact pressure on the flange 17 exercise ..
  • each supply pipe 1 is a throttle valve 18 assigned. These are inside each Feed tube 1 housed and are used for adjustment the opening cross-section of the feed pipes 1.
  • the throttle valves 18 on a common drive shaft 19 rotatably attached, which is about the same height the supply pipes in a dash-dotted line labeled 20 1, which penetrates the connecting webs 2 and the carrier 4, if it is used in it.
  • the drive shaft 19 has an actuating lever at its end assigned to the carrier 4 21, which interacts with an actuator 22, which can be attached to the carrier 4.
  • the drive shaft 19 has one for each throttle valve 18 axially extending flap section 23 and several Bearing sections 24, 25, 26, 27, 28, which are also extend axially and two of which each have a flap section 23 axially limit.
  • the flap sections 23 have a special design each have the same diameter.
  • the Bearing section 24, which on the operating lever 21 facing away axial end of the drive shaft 19 is formed, a diameter that is the same size as or smaller is than the diameter of the adjacent flap section 23. The difference is the diameter of the other bearing sections 25, 26, 27, 28 each larger than the diameter of the flap sections 23.
  • the bearing sections 24 to 28 each have a constant diameter on, the diameter of the bearing portions 24 to 28 differ from each other, such that the diameter along the drive shaft 19 towards the operating lever 21 get bigger. Accordingly, the on Bearing section formed from the end facing away from the actuating lever 21 24 the smallest diameter, while the most formed end portion facing the actuating lever 28 has the largest diameter.
  • bearing openings not visible here trained to complement the bearing sections 24 to 28 are formed so that the drive shaft 19 coaxial to the dash-dotted line 20 in the Assembly of feed pipes 1, connecting webs 2, bearing approach 3 and carrier 4 can be introduced. It is clear that the bearing openings mentioned with regard to their So the diameter of the bearing portions 24th are tuned to 28 that the drive shaft 19th is pivotable and that on the other hand a sufficient Sealing between the individual feed pipes 1 guaranteed can be. Only in the position section 28, the end of the drive shaft having the actuating lever 21 19 is assigned, additional sealants be assigned. For example, this storage section contains 28 an annular groove 29 into which e.g. a 0-ring inserted can be. The bearing opening contained in bearing approach 3 is closed on one side for hermetic sealing formed so that the associated bearing portion 24th axially penetrates into this bearing opening.
  • the feed pipes 1, the connecting webs 2, the bearing boss 3 and the carrier 4 to an injection molded component summarize as a mandrel of the injection mold formed in the same way as the drive shaft 19 can be particularly easy after injection molding is extendable from the component.
  • bringing in the drive shaft 19 simplified into the injection molded component bringing in the drive shaft 19 simplified into the injection molded component.
  • FIG. 3 shows another embodiment of the invention, which differ substantially from that in FIGS. 1 and 2 shown embodiment differs in that the Hold-down device 7 and the high-pressure supply line 5 are not in one piece with each other, but as separate components are. All hold-downs 7 are in one piece Hold-down component 32 summarized.
  • the hold-down devices 7 are without the embodiment Retaining rings 8 (see. Fig. 1 and 2) formed, but exist essentially only from the holding webs 11, which for Determining the feed pipes 1, their connecting webs 2 spread.
  • On the hold-down 7 or on the holding bars 11 are on a high pressure supply line 5 facing Side saddle-shaped seats 31, whose contour essentially complementary to the outer contour of the high pressure supply line 5 is shaped.
  • the hold-down component 32 can be placed on the high pressure supply line 5 and can be held to it.
  • This bracket is for example by a welded connection or soldered connection between the hold-down component 32 and the high pressure supply line 5 realizable.
  • the seats 31 be shaped so that there is a press fit between the high pressure supply line 5 and the attached or attached hold-down 7 forms.
  • Fig. 3 are on the feed pipes 1 and on the connecting webs 2 on one, the side facing the high pressure supply line 5 as well saddle-shaped seats 33 formed in which the high pressure supply line 5 when mounting on the engine block to the system comes.
  • These seats 33 are also expedient with regard to their contour to the outer contour of the high pressure supply line 5 adjusted.
  • the support feet are 12 on the feed pipes 1 or on the connecting webs 2 educated. Since the feed pipes 1, the connecting webs 2 and the support feet 12 formed thereon expediently Plastic are made into the through holes 13 of the support feet 12 receptacles 34, preferably made of metal, inserted to better absorb the fastening forces to be able to.
  • the receptacles 34 are on their, the engine block facing end with a radially protruding outward Collar 35 equipped in the through opening 13 inserted socket 34 as an abutment or stop serves.
  • the receptacles 34 are dimensioned such that they if they are completely in the corresponding through openings 13 are inserted with their hold-down component 32 protrude end from the through opening 13.
  • Plug-in openings 36 are formed on the hold-down devices 7, which can be plugged onto these projecting ends of the plug sleeves 34 are. These plug openings 36 are preferably such matched to these sockets 34 that between them a press fit that forms an automatic bracket of the hold-down component 32 on the receptacles 34 and thus on the connecting webs 2 through the feed pipes 1 and the support feet 12 formed assembly ensures. Consequently advanced pre-assembly can be realized, which have no additional auxiliary screws or other releasable fasteners required. For this pre-assembly is thus the high pressure supply line 5 through the hold-down component 32 fixed to the feed pipes 1, wherein the high pressure supply line 5 in the associated seats 31 and 33 comes to the plant.
  • the pre-assembled unit can then simply be attached to the engine block be fixed by holding down the 7 with screws the engine block are screwed on.
  • the brace Hold-down device 7 simultaneously the high-pressure supply line 5 and the feed pipes 1 against the engine block.

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  • 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)

Abstract

The invention relates to a piston engine comprising an engine block that contains several cylinders. The inventive piston engine also comprises a fresh-gas supply device that is provided with several supply pipes (1) which are arranged on the cylinders and are fixed to the engine block. Said piston engine further comprises a fuel injection system that is provided with a high-pressure supply line (5) which is allocated to the cylinders. The aim of the invention is to fix the supply pipes (1) and the high-pressure supply line (5) to the engine block in a simpler manner. Holding-down clamps (7) for the supply pipes (1) are configured on the high-pressure supply line (5) in such a way that the high-pressure supply line (5) fixes the supply pipes (1) to the engine block.

Description

Die Erfindung betrifft einen Kolbenmotor mit den Merkmalen des Oberbegriffs des Anspruchs 1, wie beispielsweise aus der Druckschrift FR 2 779 681 A bekannt.The invention relates to a piston engine with the features of the preamble of claim 1, such as from the Document FR 2 779 681 A known.

Ein Kolbenmotor weist einen Motorblock mit mehreren Zylindern auf und ist mit einer Frischgaszuführung ausgestattet, die mehrere, den Zylindern zugeordnete und am Motorblock festgelegte Zuführungsrohre aufweist. Über diese Frischgaszuführung wird dem Motor Ansaugluft oder Ladeluft zugeführt, die für die Verbrennung benötigt wird. Moderne Kolbenmotoren sind mit einer Kraftstoffeinspritzanlage ausgestattet, die eine den Zylindern zugeordnete Hochdruckzuführungsleitung aufweist. In einer solchen Hochdruckzuführungsleitung wird der Kraftstoff unter einem hohen Druck den Zylindern gemeinsam zur Verfügung gestellt, wobei mittels Einspritzventilen eine gezielte Dosierung des Kraftstoffs erfolgt. Eine derartige gemeinsame Hochdruckzuführungsleitung wird im allgemeinen als "Common-Rail" bezeichnet.A piston engine has an engine block with several cylinders and is equipped with a fresh gas supply, the several, assigned to the cylinders and on the engine block has specified feed pipes. About this fresh gas supply intake air or charge air is fed to the engine, which is needed for the combustion. Modern piston engines are equipped with a fuel injection system that a high pressure supply line assigned to the cylinders having. In such a high pressure supply line the fuel under high pressure is common to the cylinders provided, using injectors a targeted metering of the fuel takes place. Such one common high pressure supply line is generally referred to as "common rail".

Die Hochdruckzuführungsleitung wird aufgrund der hohen Kraftstoffdrücke vorzugsweise aus Metall hergestellt. Für die Herstellung der Zuführungsrohre wird jedoch Kunststoff bevorzugt. Die Festlegung der aus Kunststoff hergestellten Zuführungsrohre am Motorblock erfolgt in der Regel mittels Metallbuchsen, die in einen Flanschabschnitt der Zuführungsrohre eingeschweißt oder eingeschmolzen werden, um die Zuführungsrohre am Motorblock anschrauben zu können. Die Hochdruckzuführungsleitung kann dann direkt am Motorblock oder an den Zuführungsrohren und somit indirekt am Motorblock befestigt werden. Ebenso ist es möglich, die Zuführungsrohre und die Hochdruckzuführungsleitung einteilig aus Metall herzustellen, wobei diese integrale Baugruppe dann mittels einer entsprechenden Verschraubung am Motorblock festgelegt wird.The high pressure supply line is due to the high Fuel pressures are preferably made of metal. For however, the manufacture of the feed pipes becomes plastic prefers. Establishing the plastic Feed pipes on the engine block are usually made using Metal bushings that are in a flange section of the feed pipes be welded or melted to the feed pipes to be able to screw on the engine block. The high pressure supply line can then directly on the engine block or attached to the feed pipes and thus indirectly to the engine block become. It is also possible to use the feed pipes and to manufacture the high-pressure supply line in one piece from metal, this integral assembly then using a appropriate screw on the engine block becomes.

Die vorliegende Erfindung beschäftigt sich mit dem Problem, einen Kolbenmotor der eingangs genannten Art so auszubilden, daß sich die Befestigung der Hochdruckzuführungsleitung und der Zuführungsrohre vereinfacht.The present invention addresses the problem to design a piston engine of the type mentioned at the beginning, that the attachment of the high pressure supply line and of the feed pipes simplified.

Dieses Problem wird erfindungsgemäß durch einen Kolbenmotor mit den Merkmalen des Anspruchs 1 gelöst.According to the invention, this problem is solved by a piston engine solved with the features of claim 1.

Die Erfindung beruht auf dem allgemeinen Gedanken, die Hochdruckzuführungsleitung so auszugestalten, daß diese mit den Zuführungsrohren dahingehend zusammenwirkt, daß durch die Befestigung der Hochdruckzuführungsleitung gleichzeitig die Zuführungsrohre am Motorblock festgelegt werden. Durch diese Maßnahme können zusätzliche Befestigungsmittel für die Festlegung der Zuführungsrohre am Motorblock entfallen. Insbesondere ist es dadurch möglich, die Zuführungsrohre aus Kunststoff herzustellen, ohne daß zusätzliche Befestigungselemente aus Metall darin integriert werden müssen. Insgesamt ergibt sich somit eine besonders preiswerte Herstellung für die vorgeschlagene Kombination der Zuführungsrohre und der Hochdruckzuführungsleitung.The invention is based on the general idea of the high-pressure supply line to design so that these with the Feed pipes cooperates in that the Attachment of the high pressure supply line at the same time Feed pipes to be fixed on the engine block. Through this Measure can use additional fasteners for fixing the supply pipes on the engine block are not required. In particular it is thereby possible to remove the feed pipes Manufacture plastic without additional fasteners made of metal must be integrated into it. All in all This results in a particularly inexpensive manufacture for the proposed combination of the feed pipes and the high pressure supply line.

Weitere wichtige Merkmale und Vorteile der erfindungsgemäßen Vorrichtung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Other important features and advantages of the invention Device result from the dependent claims, from the Drawings and from the associated figure description based on of the drawings.

Es versteht sich, daß die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the above and those below Features to be explained not only in each case specified combination, but also in other combinations or can be used alone without the To leave the scope of the present invention.

Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird in der nachfolgenden Beschreibung näher erläutert.A preferred embodiment of the invention is in the Drawings are shown in the description below explained in more detail.

Es zeigen, jeweils schematisch,

Fig. 1
eine perspektivische Ansicht auf Zuführungsrohre und eine Hochdruckzuführungsleitung gemäß der Erfindung,
Fig. 2
eine auseinandergezogene Darstellung der Anordnung gemäß Fig. 1 und
Fig. 3
eine Darstellung wie in Fig. 2, jedoch bei einer anderen Ausführungsform.
Each shows schematically
Fig. 1
1 shows a perspective view of supply pipes and a high-pressure supply line according to the invention,
Fig. 2
an exploded view of the arrangement of FIG. 1 and
Fig. 3
a representation as in Fig. 2, but in another embodiment.

Entsprechend den Figuren 1 und 2 ist ein im übrigen nicht dargestellter Kolbenmotor mit einer Frischgaszuführung ausgestattet, von der hier Zuführungsrohre 1 dargestellt sind, die das dem Motor zugeordnete Ende der Frischgaszuführung repräsentieren und das Frischgas jeweils einem Zylinder des Kolbenmotors zuführen. Jeweils zwei zueinander benachbarte Zuführungsrohre 1 sind über einen gemeinsamen Verbindungssteg 2 aneinander befestigt.According to Figures 1 and 2 is not otherwise piston engine shown equipped with a fresh gas supply, of which feed pipes 1 are shown here, the end of the fresh gas supply assigned to the engine represent and the fresh gas one cylinder each Feed the piston engine. Two adjacent to each other Feed pipes 1 are via a common connecting web 2 attached to each other.

Die Zuführungsrohre 1 sind vorzugsweise in einer Reihe angeordnet. Da hier vier Zuführungsrohre 1 dargestellt sind, ist der zugehörige Kolbenmotor dementsprechend als Vier-Zylinder-Reihenmotor oder als Acht-Zylinder-V-Motor ausgebildet.The feed pipes 1 are preferably arranged in a row. Since four feed pipes 1 are shown here the associated piston engine accordingly as a four-cylinder in-line engine or designed as an eight-cylinder V-engine.

An einem der außenliegenden Zuführungsrohre 1 ist ein Lageransatz 3 angeformt. Am anderen außenliegenden Zuführungsrohr 1 ist ein Träger 4 angeformt. Vorzugsweise werden die Zuführungsrohre 1, die Verbindungsstege 2, der Lageransatz 3 und der Träger 4 zu einem Spritzgußbauteil zusammengefaßt und vorzugsweise aus einem geeigneten Kunststoff hergestellt.On one of the outer feed pipes 1 is a bearing approach 3 molded. On the other outside feed pipe 1, a carrier 4 is formed. Preferably the Feed pipes 1, the connecting webs 2, the bearing shoulder 3 and the carrier 4 combined into an injection molded component and preferably made of a suitable plastic.

Der Kolbenmotor besitzt außerdem eine Kraftstoffeinspritzanlage, von der hier eine Hochdruckzuführungsleitung 5 dargestellt ist, die mit Anschlüssen 6 nicht dargestellte Einspritzventile mit Kraftstoff versorgt. Da der Kraftstoff in der Hochdruckzuführungsleitung 5 unter einem hohen Arbeitsdruck steht, wird die Hochdruckzuführungsleitung 5 vorzugsweise in Metallbauweise, insbesondere durch ein Druckgußverfahren, hergestellt. An der Hochdruckzuführungsleitung 5 ist für jedes Zuführungsrohr 1 ein Niederhalter 7 ausgebildet, der einen Haltering 8 aufweist. Jeder dieser Halteringe 8 ist dabei so geformt, daß das zugehörige Zuführungsrohr 1 mit einem oberen Abschnitt 9 darin einsteckbar ist und in einem im Querschnitt erweiterten, mittleren Abschnitt 10 daran zur Anlage kommt. Dabei ist die Innenkontur des Halteringes 8 zweckmäßig an die Außenkontur des mittleren Abschnitts 10 angepaßt, so daß sich eine großflächige Anlage zwischen Haltering 8 und Zuführungsrohr 1 ausbilden kann.The piston engine also has a fuel injection system, of which a high-pressure supply line 5 is shown here is the injection valves, not shown with connections 6 fueled. Because the fuel in the high pressure supply line 5 under a high working pressure stands, the high pressure supply line 5 is preferred in metal construction, in particular by a die casting process, manufactured. At the high pressure supply line 5 is a hold-down device 7 is formed for each feed pipe 1, which has a retaining ring 8. Each of these retaining rings 8 is shaped so that the associated feed pipe 1 with an upper section 9 can be inserted therein and in an enlarged central section 10 comes into contact with it. Here is the inner contour of the retaining ring 8 expediently to the outer contour of the middle section 10 adapted so that there is a large area can form between the retaining ring 8 and the feed pipe 1.

Zwischen benachbarten Halteringen 8 weisen die Niederhalter 7 Haltestege 11 auf, die mit einer Unterseite dann auf einer Oberseite der Verbindungsstege 2 zur Anlage kommen, wenn die Halteringe 8 auf den mittleren Abschnitten 10 der Zuführungsrohre 1 aufsitzen. Auch hier wird eine großflächige Anlage zwischen den Haltestegen 11 und den Verbindungsstegen 2 bevorzugt.The hold-down devices point between adjacent retaining rings 8 7 holding webs 11, with a bottom then on a Top of the connecting webs 2 come to rest when the Retaining rings 8 on the middle sections 10 of the feed pipes 1 sit on. Here, too, will be a large area between the holding webs 11 and the connecting webs 2 prefers.

An der Hochdruckzuführungsleitung 5 und an den Niederhaltern 7 sind mehrere Stützfüße 12 ausgebildet, die in ihrem Inneren jeweils eine Durchgangsöffnung 13 für eine Schraube aufweisen. Vorzugsweise werden die Hochdruckzuführungsleitung 5, die Niederhalter 7 und die Stützfüße 12 als einteiliges Bauteil ausgebildet, das beispielsweise durch ein Druckgußverfahren hergestellt werden kann. An ihrem dem nicht dargestellten Motorblock zugewandten, unteren Ende weisen die Stützfüße 12 jeweils eine Stützplatte 14 auf, die auf einem Flansch 17 zur Anlage kommt, der an dem dem Motorblock zugewandten Ende der Zuführungsrohre 1 ausgebildet ist. Von dieser Stützplatte 14 ragen nach unten Zylinderbuchsen 15 ab, die in komplementäre Aufnahmeöffnungen 30 im Flansch 17 eingesetzt werden. Die Zylinderbuchsen 15 sind dabei so dimensioniert, daß beim Anschrauben der Stützfüße 12 am Motorblock die Stützplatten 14 einen Anpreßdruck auf den Flansch 17 ausüben..On the high pressure supply line 5 and on the hold-down devices 7, a plurality of support feet 12 are formed in the interior each have a through opening 13 for a screw. Preferably the high pressure feed line 5, the hold-down 7 and the support feet 12 as one piece Component formed, for example, by a die casting process can be manufactured. At her the not shown Engine block facing lower end have the Support feet 12 each have a support plate 14 on a Flange 17 comes to rest on that facing the engine block End of the feed pipes 1 is formed. Of this Support plate 14 protrude downwards from cylinder liners 15, inserted into complementary receiving openings 30 in flange 17 become. The cylinder liners 15 are dimensioned so that when screwing the support feet 12 to the engine block the support plates 14 a contact pressure on the flange 17 exercise ..

Zur Befestigung der Hochdruckzuführungsleitung 5 und der Zuführungsrohre 1 am Motorblock werden nun passende Schrauben in die Durchgangsöffnungen 13 eingesetzt und am Motorblock angeschraubt, wobei eine hochfeste Verbindung zwischen den Stützfüßen 12 und dem Motorblock erreicht wird. Da die Hochdruckzuführungsleitung 5 mit den Stützfüßen 12 verbunden ist, wird dadurch auch die Befestigung der Hochdruckzuführungsleitung 5 am Motorblock erreicht. Des weiteren ist die Dimensionierung eines unteren Abschnittes 16 der Zuführungsrohre 1 so gewählt, daß die Zuführungsrohre 1 mit einem an dem dem Motorblock zugewandten Ende ausgebildeten Flansch 17 mit hinreichender Andruckkraft am Motorblock festgelegt sind, wenn die Hochdruckzuführungsleitung 5 mit ihren Stützfüßen 12 am Motorblock angeschraubt ist. Zusätzliche Befestigungselemente zum Festlegen der Zuführungsrohre 1 am Motorblock werden nicht benötigt. Es ist klar, daß im Flansch 17 und/oder im Motorblock an komplementären Stellen geeignete Dichtmittel vorgesehen sind, um gegebenenfalls aufgeladenes Frischgas ohne Leckage den Zylindern des Kolbenmotors zuzuführen.For fastening the high-pressure feed line 5 and the feed pipes 1 on the engine block are now suitable screws inserted into the through holes 13 and on the engine block screwed, with a high-strength connection between the Support feet 12 and the engine block is reached. Because the high pressure supply line 5 connected to the support feet 12 is also the attachment of the high pressure supply line 5 reached on the engine block. Furthermore, it is Dimensioning of a lower section 16 of the feed pipes 1 chosen so that the feed tubes 1 with one the flange 17 formed towards the end of the engine block fixed to the engine block with sufficient pressure are when the high pressure supply line 5 with its support feet 12 is screwed to the engine block. Additional fasteners for fixing the feed pipes 1 on the engine block are not needed. It is clear that in the flange 17 and / or in the engine block at complementary locations Sealants are provided to charge if necessary Fresh gas without leakage to the cylinders of the piston engine supply.

Entsprechend Fig. 2 ist jedem Zuführungsrohr 1 eine Drosselklappe 18 zugeordnet. Diese werden im Inneren des jeweiligen Zuführungsrohres 1 untergebracht und dienen zum Einstellen des Öffnungsquerschnittes der Zuführungsrohre 1. Zu diesem Zweck werden die Drosselklappen 18 auf einer gemeinsamen Antriebswelle 19 drehfest angebracht, die etwa auf der Höhe einer mit 20 bezeichneten strichpunktierten Linie die Zuführungsrohre 1, die Verbindungsstege 2 und den Träger 4 durchdringt, wenn sie darin eingesetzt ist. Die Antriebswelle 19 weist an ihrem dem Träger 4 zugeordneten Ende einen Betätigungshebel 21 auf, der mit einem Stellantrieb 22 zusammenwirkt, der am Träger 4 angebracht werden kann.2, each supply pipe 1 is a throttle valve 18 assigned. These are inside each Feed tube 1 housed and are used for adjustment the opening cross-section of the feed pipes 1. To this Purpose are the throttle valves 18 on a common drive shaft 19 rotatably attached, which is about the same height the supply pipes in a dash-dotted line labeled 20 1, which penetrates the connecting webs 2 and the carrier 4, if it is used in it. The drive shaft 19 has an actuating lever at its end assigned to the carrier 4 21, which interacts with an actuator 22, which can be attached to the carrier 4.

Die Antriebswelle 19 weist für jede Drosselklappe 18 einen sich axial erstreckenden Klappenabschnitt 23 sowie mehrere Lagerabschnitte 24, 25, 26, 27, 28, auf, die sich ebenfalls axial erstrecken und von denen je zwei einen Klappenabschnitt 23 axial begrenzen. Entsprechend der hier dargestellten besonderen Bauweise weisen die Klappenabschnitte 23 jeweils denselben Durchmesser auf. Vorzugsweise weist der Lagerabschnitt 24, der an dem dem Betätigungshebel 21 abgewandten axialen Ende der Antriebswelle 19 ausgebildet ist, einen Durchmesser auf, der gleich groß ist wie oder kleiner ist als der Durchmesser des benachbarten Klappenabschnitts 23. Im Unterschied dazu sind die Durchmesser der anderen Lagerabschnitte 25, 26, 27, 28 jeweils größer als der Durchmesser der Klappenabschnitte 23. Des weiteren weisen die Lagerabschnitte 24 bis 28 jeweils einen konstanten Durchmesser auf, wobei sich die Durchmesser der Lagerabschnitte 24 bis 28 voneinander unterscheiden, derart, daß die Durchmesser entlang der Antriebswelle 19 in Richtung auf den Betätigungshebel 21 zu größer werden. Dementsprechend weist der am vom Betätigungshebel 21 abgewandten Ende ausgebildete Lagerabschnitt 24 den kleinsten Durchmesser auf, während der am dem Betätigungshebel zugewandten Ende ausgebildete Lagerabschnitt 28 den größten Durchmesser aufweist.The drive shaft 19 has one for each throttle valve 18 axially extending flap section 23 and several Bearing sections 24, 25, 26, 27, 28, which are also extend axially and two of which each have a flap section 23 axially limit. According to the one shown here The flap sections 23 have a special design each have the same diameter. Preferably, the Bearing section 24, which on the operating lever 21 facing away axial end of the drive shaft 19 is formed, a diameter that is the same size as or smaller is than the diameter of the adjacent flap section 23. The difference is the diameter of the other bearing sections 25, 26, 27, 28 each larger than the diameter of the flap sections 23. Furthermore, the bearing sections 24 to 28 each have a constant diameter on, the diameter of the bearing portions 24 to 28 differ from each other, such that the diameter along the drive shaft 19 towards the operating lever 21 get bigger. Accordingly, the on Bearing section formed from the end facing away from the actuating lever 21 24 the smallest diameter, while the most formed end portion facing the actuating lever 28 has the largest diameter.

Im Lageransatz 3 und in den Verbindungsstegen 2 sowie im Träger 4 sind koaxial zur Linie 20, hier nicht sichtbare Lageröffnungen ausgebildet, die komplementär zu den Lagerabschnitten 24 bis 28 ausgebildet sind, so daß die Antriebswelle 19 koaxial zu der strichpunktierten Linie 20 in die Baugruppe aus Zuführungsrohren 1, Verbindungsstegen 2, Lageransatz 3 und Träger 4 eingeführt werden kann. Es ist klar, daß die genannten Lageröffnungen bezüglich ihres Durchmessers so auf die Durchmesser der Lagerabschnitte 24 bis 28 abgestimmt sind, daß einerseits die Antriebswelle 19 schwenkverstellbar ist und daß andererseits eine hinreichende Abdichtung zwischen den einzelnen Zuführungsrohren 1 gewährleistet werden kann. Lediglich bei dem Lageabschnitt 28, der dem den Betätigungshebel 21 aufweisenden Ende der Antriebswelle 19 zugeordnet ist, können zusätzliche Dichtungsmittel zugeordnet sein. Beispielsweise enthält dieser Lagerabschnitt 28 eine Ringnut 29, in die z.B. ein 0-Ring eingesetzt werden kann. Die im Lageransatz 3 enthaltene Lageröffnung ist für eine hermetische Abdichtung einseitig geschlossen ausgebildet, so daß der zugeordnete Lagerabschnitt 24 axial in diese Lageröffnung eindringt.In the bearing approach 3 and in the connecting webs 2 and in Carrier 4 are coaxial to line 20, bearing openings not visible here trained to complement the bearing sections 24 to 28 are formed so that the drive shaft 19 coaxial to the dash-dotted line 20 in the Assembly of feed pipes 1, connecting webs 2, bearing approach 3 and carrier 4 can be introduced. It is clear that the bearing openings mentioned with regard to their So the diameter of the bearing portions 24th are tuned to 28 that the drive shaft 19th is pivotable and that on the other hand a sufficient Sealing between the individual feed pipes 1 guaranteed can be. Only in the position section 28, the end of the drive shaft having the actuating lever 21 19 is assigned, additional sealants be assigned. For example, this storage section contains 28 an annular groove 29 into which e.g. a 0-ring inserted can be. The bearing opening contained in bearing approach 3 is closed on one side for hermetic sealing formed so that the associated bearing portion 24th axially penetrates into this bearing opening.

Durch die oben beschriebene Bauweise der Antriebswelle 19 wird es vereinfacht, die Zuführungsrohre 1, die Verbindungsstege 2, den Lageransatz 3 und den Träger 4 zu einem Spritzgußbauteil zusammenzufassen, da ein Dorn der Spritzgußform in entsprechender Weise wie die Antriebswelle 19 ausgebildet werden kann und dadurch nach dem Spritzguß besonders einfach aus dem Bauteil ausziehbar ist. Darüber hinaus wird das Einbringen der Antriebswelle 19 in das Spritzgußbauteil vereinfacht.Due to the design of the drive shaft 19 described above it is simplified, the feed pipes 1, the connecting webs 2, the bearing boss 3 and the carrier 4 to an injection molded component summarize as a mandrel of the injection mold formed in the same way as the drive shaft 19 can be particularly easy after injection molding is extendable from the component. In addition, bringing in the drive shaft 19 simplified into the injection molded component.

In Fig. 3 ist eine andere Ausführungsform der Erfindung dargestellt, die sich im wesentlichen von der in den Fig. 1 und 2 gezeigten Ausführungsform dadurch unterscheidet, daß die Niederhalter 7 und die Hochdruckzuführungsleitung 5 nicht einteilig aneinander, sondern als separate Bauteile ausgebildet sind. Dabei sind alle Niederhalter 7 zu einem einteiligen Niederhalterbauteil 32 zusammengefaßt. Bei dieser speziellen Ausführungsform sind die Niederhalter 7 ohne die Halteringe 8 (vgl. Fig. 1 und 2) ausgebildet, sondern bestehen im wesentlichen nur aus den Haltestegen 11, welche zum Festlegen der Zuführungsrohre 1 deren Verbindungsstege 2 übergreifen. An den Niederhaltern 7 bzw. an den Haltestegen 11 sind an einer der Hochdruckzuführungsleitung 5 zugewandten Seite sattelförmige Sitze 31 ausgebildet, deren Kontur im wesentlichen komplementär zur Außenkontur der Hochdruckzuführungsleitung 5 geformt ist. Hierdurch ist das Niederhalterbauteil 32 auf die Hochdruckzuführungsleitung 5 aufsetzbar und kann daran gehaltert werden. Diese Halterung ist beispielsweise durch eine Schweißverbindung oder Lötverbindung zwischen dem Niederhalterbauteil 32 und der Hochdruckzuführungsleitung 5 realisierbar. Ebenso können die Sitze 31 so geformt sein, daß sich ein Klemmsitz zwischen der Hochdruckzuführungsleitung 5 und den darauf aufgesetzten bzw. aufgesteckten Niederhaltern 7 ausbildet.3 shows another embodiment of the invention, which differ substantially from that in FIGS. 1 and 2 shown embodiment differs in that the Hold-down device 7 and the high-pressure supply line 5 are not in one piece with each other, but as separate components are. All hold-downs 7 are in one piece Hold-down component 32 summarized. With this particular The hold-down devices 7 are without the embodiment Retaining rings 8 (see. Fig. 1 and 2) formed, but exist essentially only from the holding webs 11, which for Determining the feed pipes 1, their connecting webs 2 spread. On the hold-down 7 or on the holding bars 11 are on a high pressure supply line 5 facing Side saddle-shaped seats 31, whose contour essentially complementary to the outer contour of the high pressure supply line 5 is shaped. This is the hold-down component 32 can be placed on the high pressure supply line 5 and can be held to it. This bracket is for example by a welded connection or soldered connection between the hold-down component 32 and the high pressure supply line 5 realizable. Likewise, the seats 31 be shaped so that there is a press fit between the high pressure supply line 5 and the attached or attached hold-down 7 forms.

Durch die separate Ausbildung der Niederhalter 7 und der Hochdruckzuführungsleitung 5 können für die separaten Bauteile verschiedene Herstellungsmaterialien und/oder Herstellungsverfahren zur Anwendung kommen, die hinsichtlich der jeweiligen Bauteilfunktion und Anforderungen optimiert sind.Due to the separate design of the hold-down 7 and High pressure supply line 5 can be used for the separate components various manufacturing materials and / or manufacturing processes are used, which regarding the respective component function and requirements are optimized.

Bei der in Fig. 3 gezeigten Ausführungsform sind an den Zuführungsrohren 1 sowie an den Verbindungsstegen 2 an einer, der Hochdruckzuführungsleitung 5 zugewandten Seite ebenfalls sattelförmige Sitze 33 ausgebildet, in denen die Hochdruckzuführungsleitung 5 beim Anbau am Motorblock zur Anlage kommt. Zweckmäßigerweise sind auch diese Sitze 33 hinsichtlich ihrer Kontur an die Außenkontur der Hochdruckzuführungsleitung 5 angepaßt.In the embodiment shown in Fig. 3 are on the feed pipes 1 and on the connecting webs 2 on one, the side facing the high pressure supply line 5 as well saddle-shaped seats 33 formed in which the high pressure supply line 5 when mounting on the engine block to the system comes. These seats 33 are also expedient with regard to their contour to the outer contour of the high pressure supply line 5 adjusted.

Bei der Ausführungsform gemäß Fig. 3 sind die Stützfüße 12 an den Zuführungsrohren 1 bzw. an den Verbindungsstegen 2 ausgebildet. Da die Zuführungsrohre 1, die Verbindungsstege 2 und die daran angeformten Stützfüße 12 zweckmäßig aus Kunststoff hergestellt sind, werden in die Durchgangsöffnungen 13 der Stützfüße 12 Steckhülsen 34, vorzugsweise aus Metall, eingesteckt, um die Befestigungskräfte besser aufnehmen zu können. Die Steckhülsen 34 sind an ihrem, dem Motorblock zugewandten Ende mit einem radial nach außen abstehenden Kragen 35 ausgestattet, der bei in die Durchgangsöffnung 13 eingesteckter Steckhülse 34 als Widerlager bzw. Anschlag dient. Die Steckhülsen 34 sind so dimensioniert, daß sie, wenn sie vollständig in die zugehörigen Durchgangsöffnungen 13 eingesteckt sind, mit ihrem, dem Niederhalterbauteil 32 zugewandten Ende aus der Durchgangsöffnung 13 hervorstehen. An den Niederhaltern 7 sind Stecköffnungen 36 ausgebildet, die auf diese vorstehenden Enden der Steckhülsen 34 aufsteckbar sind. Vorzugsweise sind diese Stecköffnungen 36 so auf diese Steckhülsen 34 abgestimmt, daß sich zwischen diesen ein Preßsitz ausbildet, der eine selbsttätige Halterung des Niederhalterbauteils 32 an den Steckhülsen 34 und somit an der durch die Zuführungsrohre 1, die Verbindungsstege 2 und die Stützfüße 12 gebildeten Baugruppe gewährleistet. Somit läßt sich eine weit fortgeschrittene Vormontage realisieren, die keine zusätzlichen Hilfsschrauben oder sonstige lösbare Befestigungsmittel erfordert. Für diese Vormontage wird somit die Hochdruckzuführungsleitung 5 durch das Niederhalterbauteil 32 an den Zuführungsrohren 1 fixiert, wobei die Hochdruckzuführungsleitung 5 in den zugehörigen Sitzen 31 und 33 zur Anlage kommt. Vorzugsweise wird dazu zunächst das Niederhalterbauteil 32 an der Hochdruckzuführungsleitung 5 fixiert, beispielsweise durch einen Klemmsitz. Anschließend wird die durch Niederhalterbauteil 32 und Hochdruckzuführungsleitung 5 gebildete Baugruppe auf die Baugruppe aus Zuführungsrohren 1, Verbindungsstegen 2 und Stützfüßen 12 aufgesetzt.In the embodiment according to FIG. 3, the support feet are 12 on the feed pipes 1 or on the connecting webs 2 educated. Since the feed pipes 1, the connecting webs 2 and the support feet 12 formed thereon expediently Plastic are made into the through holes 13 of the support feet 12 receptacles 34, preferably made of metal, inserted to better absorb the fastening forces to be able to. The receptacles 34 are on their, the engine block facing end with a radially protruding outward Collar 35 equipped in the through opening 13 inserted socket 34 as an abutment or stop serves. The receptacles 34 are dimensioned such that they if they are completely in the corresponding through openings 13 are inserted with their hold-down component 32 protrude end from the through opening 13. Plug-in openings 36 are formed on the hold-down devices 7, which can be plugged onto these projecting ends of the plug sleeves 34 are. These plug openings 36 are preferably such matched to these sockets 34 that between them a press fit that forms an automatic bracket of the hold-down component 32 on the receptacles 34 and thus on the connecting webs 2 through the feed pipes 1 and the support feet 12 formed assembly ensures. Consequently advanced pre-assembly can be realized, which have no additional auxiliary screws or other releasable fasteners required. For this pre-assembly is thus the high pressure supply line 5 through the hold-down component 32 fixed to the feed pipes 1, wherein the high pressure supply line 5 in the associated seats 31 and 33 comes to the plant. This is preferably done first the hold-down component 32 on the high-pressure supply line 5 fixed, for example by a press fit. Subsequently through the hold-down component 32 and high pressure supply line 5 formed assembly on the assembly Feed pipes 1, connecting webs 2 and support feet 12 placed.

Die so vormontierte Einheit kann dann einfach am Motorblock festgelegt werden, indem die Niederhalter 7 mit Schrauben an den Motorblock angeschraubt werden. Dabei verspannen die Niederhalter 7 gleichzeitig die Hochdruckzuführungsleitung 5 und die Zuführungsrohre 1 gegen den Motorblock.The pre-assembled unit can then simply be attached to the engine block be fixed by holding down the 7 with screws the engine block are screwed on. The brace Hold-down device 7 simultaneously the high-pressure supply line 5 and the feed pipes 1 against the engine block.

Claims (18)

  1. A piston engine having an engine block which has several cylinders, with a fresh gas inlet having several inlet pipes (1) which are mounted on the engine block and are provided for the cylinders, and having a fuel injection system which has a high-pressure inlet line (5) that is provided for the cylinders,
    characterized in that
    holding-down clamps (7) for the inlet pipes (1) are formed on the high-pressure inlet line (5) so that the high-pressure inlet line (5) mounted on the engine block secures the inlet pipes (1) on the engine block.
  2. The piston engine according to Claim 1,
    characterized in that
    the inlet pipes (1) are made of plastic and the high-pressure inlet line (5) is made of metal.
  3. The piston engine according to Claim 1 or 2,
    characterized in that
    the holding-down clamps (7) have a retaining ring (8) for each inlet pipe (1) encompassing the inlet pipe (1).
  4. The piston engine according to one of Claims 1 through 3,
    characterized in that
    two adjacent inlet pipes (1) are attached to one another by a connecting web (2), whereby the holding-down clamps (7) have at least one retaining web (11) which extends beyond this connecting web (2).
  5. The piston engine according to one of Claims 1 through 4,
    characterized in that
    supporting feet (12) are designed on the high-pressure inlet line (5) and/or on the holding-down clamps (7), each supporting foot having an inside passage (13) for a screw, whereby the high-pressure inlet line (5) is attached to the engine block by screwing on the supporting feet (12).
  6. The piston engine according to Claim 5,
    characterized in that
    a flange (17) is formed on the inlet pipe (1) on an end facing the engine block, so that at least one of the supporting feet (12) is supported on this flange, said flange (17) containing an opening (30) which is aligned with the inside passage (13) in the supporting foot (12).
  7. The piston engine according to Claim 6,
    characterized in that
    the supporting foot (12) has a supporting plate (14) with which the supporting foot (12) is supported on the flange (17).
  8. The piston engine according to Claim 6 or 7,
    characterized in that
    the supporting foot (12) has on the end facing the engine block a cylinder bushing (15) which penetrates into the opening (30) in the flange (17).
  9. The piston engine according to one of Claims 1 through 8,
    characterized in that
    several inlet pipes (1) are combined into one injection molded part.
  10. The piston engine according to one of Claims 1 through 9,
    characterized in that
    the holding-down clamps (7) are designed in one piece with the high-pressure inlet line (5).
  11. The piston engine according to one of Claims 1 through 9,
    characterized in that
    the holding-down clamps (7) and the high-pressure inlet line (5) are designed as separate components.
  12. The piston engine according to Claim 11,
    characterized in that
    several holding-down clamps (7) are combined into a one-piece component (32).
  13. The piston engine according to Claim 11 or 12,
    characterized in that
    the holding-down clamps (7) are supported on the high-pressure inlet line (5).
  14. The piston engine according to one of Claims 11 through 13,
    characterized in that
    saddle-shaped seats (31, 33) are formed on the holding-down clamps (7) and/or on the inlet pipes (1), these seats being in contact with the high-pressure inlet line (5) when the latter is mounted on the engine block.
  15. The piston engine according to one of Claims 1 through 14,
    characterized in that
    each inlet pipe (1) contains a throttle valve (18),
    the throttle valves (18) are mounted on a common drive shaft (19) in a rotationally fixed manner,
    the drive shaft (19) has valve sections (23) and bearing sections (24, 25, 26, 27, 28) arranged in alternation in the axial direction,
    each bearing section (24, 25, 26, 27, 28) has a constant diameter in the axial direction, each bearing section having a different diameter, such that the diameters of the bearing sections increase in the axial direction.
  16. The piston engine according to Claim 15,
    characterized in that
    the smallest diameter of the bearing sections (24, 25, 26, 27, 28) is equal to or greater than the diameter of the adjacent valve section (23) and the diameters of the other bearing sections are greater than the diameters of the valve sections (23).
  17. The piston engine according to Claim 15 or 16,
    characterized in that
    the valve sections (23) each have the same diameter.
  18. The piston engine according to one of Claims 15 through 17,
    characterized in that
    a connecting web (2) is formed between adjacent inlet pipes (1), with the drive shaft (19) extending through this web, and with each connecting web (2) having a bearing opening which is designed to be complementary to the respective bearing section (25, 26, 27) of the drive shaft (19).
EP00991771A 1999-12-24 2000-12-21 Piston engine Expired - Lifetime EP1240423B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19962987A DE19962987A1 (en) 1999-12-24 1999-12-24 Piston engine
DE19962987 1999-12-24
PCT/DE2000/004579 WO2001048368A1 (en) 1999-12-24 2000-12-21 Piston engine

Publications (2)

Publication Number Publication Date
EP1240423A1 EP1240423A1 (en) 2002-09-18
EP1240423B1 true EP1240423B1 (en) 2004-03-03

Family

ID=7934487

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00991771A Expired - Lifetime EP1240423B1 (en) 1999-12-24 2000-12-21 Piston engine

Country Status (5)

Country Link
US (1) US6619256B2 (en)
EP (1) EP1240423B1 (en)
JP (1) JP4571770B2 (en)
DE (2) DE19962987A1 (en)
WO (1) WO2001048368A1 (en)

Cited By (1)

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US20030106525A1 (en) 2003-06-12
EP1240423A1 (en) 2002-09-18
JP2003518582A (en) 2003-06-10
WO2001048368A1 (en) 2001-07-05
DE19962987A1 (en) 2001-07-05
US6619256B2 (en) 2003-09-16
JP4571770B2 (en) 2010-10-27
DE50005560D1 (en) 2004-04-08

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