EP1240423A1 - Piston engine - Google Patents

Piston engine

Info

Publication number
EP1240423A1
EP1240423A1 EP00991771A EP00991771A EP1240423A1 EP 1240423 A1 EP1240423 A1 EP 1240423A1 EP 00991771 A EP00991771 A EP 00991771A EP 00991771 A EP00991771 A EP 00991771A EP 1240423 A1 EP1240423 A1 EP 1240423A1
Authority
EP
European Patent Office
Prior art keywords
piston engine
engine according
hold
supply line
feed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00991771A
Other languages
German (de)
French (fr)
Other versions
EP1240423B1 (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

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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.
  • a piston engine has an engine block with a plurality of cylinders and is equipped with a fresh gas supply which has a plurality of supply pipes which are assigned to the cylinders and fixed to the engine block. This fresh gas supply feeds the engine with intake air or charge air, which is required for combustion.
  • Modern piston engines are equipped with a fuel injection system that has a high-pressure supply line assigned to the cylinders. In such a high-pressure supply line, the fuel is made available to the cylinders together at a high pressure, with a targeted metering of the fuel being carried out by means of injection valves.
  • Such a common high-pressure supply line is generally referred to as a “Cor ⁇ mon rail”.
  • the high pressure supply line is preferably made of metal due to the high fuel pressures.
  • plastic is used to manufacture the feed pipes prefers.
  • the supply pipes made of plastic are fixed on the engine block as a rule by means of metal bushings which are welded or melted into a flange section of the supply pipes in order to be able to screw the supply pipes onto the engine block.
  • the high-pressure feed line can then be attached directly to the engine block or to the feed pipes and thus indirectly to the engine block. It is also possible to manufacture the supply pipes and the high-pressure supply line in one piece from metal, this integral assembly then being fixed to the engine block by means of a corresponding screw connection.
  • the present invention is concerned with the problem of designing a piston engine of the type mentioned in the introduction in such a way that the fastening of the high-pressure supply line and the supply pipes is simplified.
  • the invention is based on the general idea of designing the high-pressure feed line in such a way that it interacts with the feed pipes in such a way that the feed pipes are simultaneously fixed to the engine block by fastening the high-pressure feed line.
  • This measure makes it possible to dispense with additional fastening means for fixing the feed pipes to the engine block.
  • this makes it possible to remove the feed pipes Manufacture plastic without the need to integrate additional metal fasteners. Overall, this results in a particularly inexpensive production for the proposed combination of the feed pipes and the high-pressure feed line.
  • FIG. 1 is a perspective view of supply pipes and a high pressure supply line according to the invention
  • FIG. 2 is an exploded view of the arrangement of FIG. 1 and Fig. 3 is an illustration as in Fig. 2, but in another embodiment.
  • a piston engine (not shown) is equipped with a fresh gas supply, of which supply pipes 1 are shown, which represent the end of the fresh gas supply assigned to the engine and feed the fresh gas to one cylinder of the piston engine.
  • supply pipes 1 which represent the end of the fresh gas supply assigned to the engine and feed the fresh gas to one cylinder of the piston engine.
  • Two feed tubes 1, which are adjacent to one another, are fastened to one another via a common connecting web 2.
  • the feed pipes 1 are preferably arranged in a row. Since four feed pipes 1 are shown here, the associated piston engine is accordingly designed as a four-cylinder in-line engine or as an eight-cylinder V-engine.
  • a bearing shoulder 3 is formed on one of the outer feed pipes 1.
  • a carrier 4 is formed on the other external feed pipe 1.
  • the feed pipes 1, the connecting webs 2, the bearing boss 3 and the carrier 4 are preferably combined to form an injection molded component and are preferably made from a suitable plastic.
  • the piston engine also has a fuel injection system, of which a high-pressure supply line 5 is shown here, the inlet (not shown with connections 6) spray valves supplied with fuel. Since the fuel in the high-pressure supply line 5 is under a high working pressure, the high-pressure supply line 5 is preferably produced in a metal construction, in particular by a die-casting process.
  • Each of these retaining rings 8 is shaped in such a way that the associated feed tube 1 with an upper section 9 can be inserted therein and comes into contact with it in an enlarged central section 10.
  • the inner contour of the retaining ring 8 is expediently adapted to the outer contour of the central section 10, so that a large-area contact between the retaining ring 8 and the feed pipe 1 can be formed.
  • the hold-downs 7 have retaining webs 11, which come to rest with an underside on an upper side of the connecting webs 2 when the retaining rings 8 are seated on the middle sections 10 of the feed pipes 1.
  • a large-area contact between the holding webs 11 and the connecting webs 2 is preferred.
  • a plurality of support feet 12 are formed on the high-pressure supply line 5 and on the hold-down devices 7, each of which has a passage opening 13 for a screw in its interior.
  • the high-pressure supply line 5, the hold-down device 7 and the support feet 12 are preferably designed as a one-piece component, which can be process can be produced.
  • the support feet 12 At its lower end, which faces the engine block (not shown), the support feet 12 each have a support plate 14 which comes to rest on a flange 17 which is formed on the end of the feed pipes 1 which faces the engine block. From this support plate 14 protrude down cylinder sleeves 15 which are used in complementary receiving openings 30 in the flange 17.
  • the cylinder sleeves 15 are dimensioned such that when the support feet 12 are screwed onto the engine block, the support plates 14 exert a contact pressure on the flange 17.
  • a throttle valve 18 is assigned to each feed pipe 1. These are housed in the interior of the respective feed pipe 1 and are used to adjust the opening cross section of the feed pipes 1.
  • the throttle valves 18 are rotatably mounted on a common drive shaft 19 which, approximately at the level of a dash-dotted line 20, denotes the feed pipes 1 Crosspieces 2 and the carrier 4 penetrates when it is inserted therein.
  • the drive shaft 19 has at its end assigned to the carrier 4 an actuating lever 21 which interacts with an actuator 22 which can be attached to the carrier 4.
  • the drive shaft 19 has for each throttle valve 18 an axially extending flap section 23 and / or a plurality of bearing sections 24, 25, 26, 27, 28, which also extend axially and two of which axially delimit a flap section 23.
  • the flap sections 23 each have the same diameter.
  • the bearing section 24, which is formed on the axial end of the drive shaft 19 facing away from the actuating lever 21, preferably has a diameter which is equal to or smaller than the diameter of the adjacent flap section 23. In contrast to this, the diameters are other countries gerab4.000e 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, the diameters of the bearing sections 24 to 28 differing from one another such that the diameters along the Drive shaft 19 in the direction of the actuating lever 21 to become larger. Accordingly, the bearing section 24 formed on the end facing away from the actuating lever 21 has the smallest diameter, while the bearing section 28 formed on the end facing the actuating lever has the largest diameter.
  • bearing boss 3 and in the connecting webs 2 and in the carrier 4 are formed coaxially to the line 20, here not visible bearing openings, which are complementary to the bearing sections 24 to 28, so that the drive shaft 19 coaxial with the dash-dotted line 20 in the assembly Feed pipes 1, connecting webs 2, bearing shoulder 3 and carrier 4 can be inserted.
  • bearing openings are matched to the diameter of the bearing sections 24 to 28 in such a way that on the one hand the drive shaft 19 can be pivoted and that on the other hand an adequate seal between the individual feed pipes 1 can be ensured.
  • Additional sealing means can only be assigned to the position section 28 which is assigned to the end of the drive shaft 19 which has the actuating lever 21.
  • this bearing section 28 contains an annular groove 29 into which, for example, an O-ring is inserted. can be set.
  • the bearing opening contained in the bearing projection 3 is closed on one side for a hermetic seal, so that the associated bearing section 24 penetrates axially into this bearing opening.
  • the above-described construction of the drive shaft 19 makes it easier to combine the feed pipes 1, the connecting webs 2, the bearing boss 3 and the carrier 4 to form an injection-molded component, since a mandrel of the injection mold can be designed in a manner corresponding to the drive shaft 19 and thereby the injection molding is particularly easy to pull out of the component.
  • the introduction of the drive shaft 19 into the injection molded component is simplified.
  • FIGS. 1 and 2 show another embodiment of the invention, which essentially differs from the embodiment shown in FIGS. 1 and 2 in that the hold-down device 7 and the high-pressure supply line 5 are not formed in one piece with one another but as separate components. All hold-downs 7 are combined to form a one-piece hold-down component 32.
  • the hold-down 7 are formed without the retaining rings 8 (see FIGS. 1 and 2), but essentially consist only of the holding webs 11, which overlap the connecting webs 2 for fixing the feed pipes 1.
  • Saddle-shaped seats 31 are formed on the hold-down devices 7 and on the holding webs 11 on a side facing the high-pressure supply line 5, the contour of which seats is shaped essentially complementary to the outer contour of the high pressure supply line 5.
  • the hold-down component 32 can be placed on the high-pressure supply line 5 and can be held thereon.
  • This holder can be implemented, for example, by a welded connection or solder connection between the hold-down component 32 and the high-pressure supply line 5.
  • the seats 31 can be shaped in such a way that a clamped fit is formed between the high-pressure supply line 5 and the hold-down devices 7 placed or attached thereon.
  • saddle-shaped seats 33 are also formed on the feed pipes 1 and on the connecting webs 2 on a side facing the high-pressure feed line 5, in which the high-pressure feed line 5 comes to rest when attached to the engine block.
  • these seats 33 are also adapted in terms of their contours to the outer contours of the high-pressure supply line 5.
  • the support feet 12 are formed on the feed pipes 1 and on the connecting webs 2. Since the feed pipes 1, the connecting webs 2 and the support feet 12 formed thereon are expediently made of plastic, plug sleeves 34, preferably made of metal, are inserted into the through openings 13 of the support feet 12 in order to be able to better absorb the fastening forces.
  • the receptacles 34 are equipped at their end facing the engine block with a radially outwardly projecting collar 35, which serves as an abutment or stop when the receptacle 34 is inserted into the through opening 13.
  • the plug-in sleeves 34 are dimensioned such that when they are completely inserted into the associated through-openings 13 they protrude from the through-opening 13 with their end facing the hold-down component 32.
  • Plug-in openings 36 are formed on the hold-down devices 7 and can be plugged onto these projecting ends of the plug-in sleeves 34. These plug-in openings 36 are preferably matched to these plug-in sleeves 34 in such a way that a press fit is formed between them, which ensures that the hold-down component 32 is held automatically on the plug-in sleeves 34 and thus on the assembly formed by the feed pipes 1, the connecting webs 2 and the support feet 12 , This enables a very advanced pre-assembly to be carried out, which does not require any additional auxiliary screws or other releasable fastening means.
  • the high-pressure supply line 5 is thus fixed by the hold-down component 32 to the supply pipes 1, the high-pressure supply line 5 coming to rest in the associated seats 31 and 33.
  • the hold-down component 32 is preferably first fixed to the high-pressure supply line 5, for example by a clamp fit. subse- The assembly formed by hold-down component 32 and high-pressure supply line 5 is placed on the assembly of supply pipes 1, connecting webs 2 and support feet 12.
  • the unit thus preassembled can then simply be attached to the engine block by screwing the hold-down devices 7 onto the engine block with screws.
  • the hold-down devices 7 simultaneously clamp the high-pressure feed line 5 and the feed pipes 1 against the engine block.

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)

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

Kolbenmotor piston engine
Die Erfindung betrifft einen Kolbenmotor mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a piston engine with the features of the preamble of claim 1.
Ein Kolbenmotor weist einen Motorblock mit mehreren Zylindern auf und ist mit einer Frischgaszufuhrung ausgestattet, die mehrere, den Zylindern zugeordnete und am Motorblock festgelegte Zufuhrungsrohre aufweist. Über diese Frischgas- zufuhrung wird dem Motor Ansaugluft oder Ladeluft zugeführt, die für die Verbrennung benotigt wird. Moderne Kolbenmotoren sind mit einer Kraftstoffemspritzanlage ausgestattet, die eine den Zylindern zugeordnete Hochdruckzufuhrungsleitung aufweist. In einer solchen Hochdruckzufuhrungsleitung wird der Kraftstoff unter einem hohen Druck den Zylindern gemeinsam zur Verfugung gestellt, wobei mittels Einspritzventilen eine gezielte Dosierung des Kraftstoffs erfolgt. Eine derartige gemeinsame Hochdruckzufuhrungsleitung wird im allgemeinen als „Corαmon-Rail" bezeichnet.A piston engine has an engine block with a plurality of cylinders and is equipped with a fresh gas supply which has a plurality of supply pipes which are assigned to the cylinders and fixed to the engine block. This fresh gas supply feeds the engine with intake air or charge air, which is required for combustion. Modern piston engines are equipped with a fuel injection system that has a high-pressure supply line assigned to the cylinders. In such a high-pressure supply line, the fuel is made available to the cylinders together at a high pressure, with a targeted metering of the fuel being carried out by means of injection valves. Such a common high-pressure supply line is generally referred to as a “Corαmon rail”.
Die Hochdruckzufuhrungsleitung wird aufgrund der hohen Kraftstoffdrucke vorzugsweise aus Metall hergestellt. Für die Herstellung der Zufuhrungsrohre 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 Hochdruckzufuhrungsleitung kann dann direkt am Motorblock oder an den Zuführungsrohren und somit indirekt am Motorblock befestigt werden. Ebenso ist es möglich, die Zuführungsrohre und die Hochdruckzufuhrungsleitung einteilig aus Metall herzustellen, wobei diese integrale Baugruppe dann mittels einer entsprechenden Verschraubung am Motorblock festgelegt wird.The high pressure supply line is preferably made of metal due to the high fuel pressures. However, plastic is used to manufacture the feed pipes prefers. The supply pipes made of plastic are fixed on the engine block as a rule by means of metal bushings which are welded or melted into a flange section of the supply pipes in order to be able to screw the supply pipes onto the engine block. The high-pressure feed line can then be attached directly to the engine block or to the feed pipes and thus indirectly to the engine block. It is also possible to manufacture the supply pipes and the high-pressure supply line in one piece from metal, this integral assembly then being fixed to the engine block by means of a corresponding screw connection.
Die vorliegende Erfindung beschäftigt sich mit dem Problem, einen Kolbenmotor der eingangs genannten Art so auszubilden, daß sich die Befestigung der Hochdruckzufuhrungsleitung und der Zuführungsrohre vereinfacht.The present invention is concerned with the problem of designing a piston engine of the type mentioned in the introduction in such a way that the fastening of the high-pressure supply line and the supply pipes is 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 having the features of claim 1.
Die Erfindung beruht auf dem allgemeinen Gedanken, die Hochdruckzufuhrungsleitung so auszugestalten, daß diese mit den Zuführungsrohren dahingehend zusammenwirkt, daß durch die Befestigung der Hochdruckzufuhrungsleitung 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 Hochdruckzufuhrungsleitung.The invention is based on the general idea of designing the high-pressure feed line in such a way that it interacts with the feed pipes in such a way that the feed pipes are simultaneously fixed to the engine block by fastening the high-pressure feed line. This measure makes it possible to dispense with additional fastening means for fixing the feed pipes to the engine block. In particular, this makes it possible to remove the feed pipes Manufacture plastic without the need to integrate additional metal fasteners. Overall, this results in a particularly inexpensive production for the proposed combination of the feed pipes and the high-pressure feed 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.Further important features and advantages of the device according to the invention result from the subclaims, from the drawings and from the associated description of the figures with reference to 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 goes without saying that the features mentioned above and those yet to be explained below can be used not only in the combination indicated in each case, but also in other combinations or on their own without departing from 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 shown in the drawings and is explained in more detail in the following description.
Es zeigen, jeweils schematisch,Each shows schematically
Fig. 1 eine perspektivische Ansicht auf Zuführungsrohre und eine Hochdruckzufuhrungsleitung gemäß der Erfindung,1 is a perspective view of supply pipes and a high pressure supply line according to the invention,
Fig. 2 eine auseinandergezogene Darstellung der Anordnung gemäß Fig. 1 und Fig. 3 eine Darstellung wie in Fig. 2, jedoch bei einer anderen Ausführungsform.Fig. 2 is an exploded view of the arrangement of FIG. 1 and Fig. 3 is an illustration 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 FIGS. 1 and 2, a piston engine (not shown) is equipped with a fresh gas supply, of which supply pipes 1 are shown, which represent the end of the fresh gas supply assigned to the engine and feed the fresh gas to one cylinder of the piston engine. Two feed tubes 1, which are adjacent to one another, are fastened to one another via a common connecting web 2.
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 is accordingly designed as a four-cylinder in-line engine or 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.A bearing shoulder 3 is formed on one of the outer feed pipes 1. A carrier 4 is formed on the other external feed pipe 1. The feed pipes 1, the connecting webs 2, the bearing boss 3 and the carrier 4 are preferably combined to form an injection molded component and are preferably made from a suitable plastic.
Der Kolbenmotor besitzt außerdem eine Kraftstoffeinspritzan- lage, von der hier eine Hochdruckzufuhrungsleitung 5 dargestellt ist, die mit Anschlüssen 6 nicht dargestellte Ein- spritzventile mit Kraftstoff versorgt. Da der Kraftstoff in der Hochdruckzufuhrungsleitung 5 unter einem hohen Arbeitsdruck steht, wird die Hochdruckzufuhrungsleitung 5 vorzugsweise in Metallbauweise, insbesondere durch ein Druckgußverfahren, hergestellt. An der Hochdruckzufuhrungsleitung 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, the inlet (not shown with connections 6) spray valves supplied with fuel. Since the fuel in the high-pressure supply line 5 is under a high working pressure, the high-pressure supply line 5 is preferably produced in a metal construction, in particular by a die-casting process. A hold-down device 7, which has a holding ring 8, is formed on the high-pressure feed line 5 for each feed pipe 1. Each of these retaining rings 8 is shaped in such a way that the associated feed tube 1 with an upper section 9 can be inserted therein and comes into contact with it in an enlarged central section 10. The inner contour of the retaining ring 8 is expediently adapted to the outer contour of the central section 10, so that a large-area contact between the retaining ring 8 and the feed pipe 1 can be formed.
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 .Between adjacent retaining rings 8, the hold-downs 7 have retaining webs 11, which come to rest with an underside on an upper side of the connecting webs 2 when the retaining rings 8 are seated on the middle sections 10 of the feed pipes 1. Here, too, a large-area contact between the holding webs 11 and the connecting webs 2 is preferred.
An der Hochdruckzufuhrungsleitung 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 Hochdruckzufuhrungsleitung 5, die Niederhalter 7 und die Stützfüße 12 als einteiliges Bauteil ausgebildet, das beispielsweise durch ein Druckguß- verfahren hergestellt werden kann. An ihrem dem nicht dargestellten Motorblock zugewandten, unteren Ende weisen die Stutzfuße 12 jeweils eine Stutzplatte 14 auf, die auf einem Flansch 17 zur Anlage kommt, der an dem dem Motorblock zugewandten Ende der Zufuhrungsrohre 1 ausgebildet ist. Von dieser Stutzplatte 14 ragen nach unten Zylinderbuchsen 15 ab, die in komplementäre Aufnahmeoffnungen 30 im Flansch 17 eingesetzt werden. Die Zylinderbuchsen 15 sind dabei so dimensioniert, daß beim Anschrauben der Stutzfuße 12 am Motorblock die Stutzplatten 14 einen Anpreßdruck auf den Flansch 17 ausüben..A plurality of support feet 12 are formed on the high-pressure supply line 5 and on the hold-down devices 7, each of which has a passage opening 13 for a screw in its interior. The high-pressure supply line 5, the hold-down device 7 and the support feet 12 are preferably designed as a one-piece component, which can be process can be produced. At its lower end, which faces the engine block (not shown), the support feet 12 each have a support plate 14 which comes to rest on a flange 17 which is formed on the end of the feed pipes 1 which faces the engine block. From this support plate 14 protrude down cylinder sleeves 15 which are used in complementary receiving openings 30 in the flange 17. The cylinder sleeves 15 are dimensioned such that when the support feet 12 are screwed onto the engine block, the support plates 14 exert a contact pressure on the flange 17.
Zur Befestigung der Hochdruckzufuhrungsleitung 5 und der Zufuhrungsrohre 1 am Motorblock werden nun passende Schrauben in die Durchgangsoffnungen 13 eingesetzt und am Motorblock angeschraubt, wobei eine hochfeste Verbindung zv/ischen den Stutzfußen 12 und dem Motorblock erreicht wird. Da die Hochdruckzufuhrungsleitung 5 mit den Stutzfußen 12 verbunden ist, wird dadurch auch die Befestigung der Hochdruckzufuhrungsleitung 5 am Motorblock erreicht. Des weiteren ist die Dimensionierung eines unteren Abschnittes 16 der Zufuhrungsrohre 1 so gewählt, daß die Zufuhrungsrohre 1 mit einem an dem dem Motorblock zugewandten Ende ausgebildeten Flansch 17 mit hinreichender Andruckkraft am Motorblock festgelegt sind, wenn die Hochdruckzufuhrungsleitung 5 mit ihren Stutzfußen 12 am Motorblock angeschraubt ist. Zusatzliche Befestigungselemente zum Festlegen der Zufuhrungsrohre 1 am Motorblock werden nicht benotigt. Es ist klar, daß im Flansch 17 und/oder im Motorblock an komplementären Stellen geeigne- te 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 to the engine block, suitable screws are now inserted into the through-openings 13 and screwed onto the engine block, a high-strength connection being achieved between the support feet 12 and the engine block. Since the high-pressure supply line 5 is connected to the support feet 12, the fastening of the high-pressure supply line 5 to the engine block is also achieved. Furthermore, the dimensioning of a lower section 16 of the feed pipes 1 is selected such that the feed pipes 1 are fixed to the engine block with a sufficient pressure force on the flange 17 formed on the end facing the engine block when the high-pressure feed line 5 is screwed to the engine block with its support feet 12 , Additional fastening elements for fixing the feed pipes 1 to the engine block are not required. It is clear that in the flange 17 and / or in the engine block at complementary locations suitable te sealant are provided to supply charged fresh gas to the cylinders of the piston engine without leakage.
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, a throttle valve 18 is assigned to each feed pipe 1. These are housed in the interior of the respective feed pipe 1 and are used to adjust the opening cross section of the feed pipes 1. For this purpose, the throttle valves 18 are rotatably mounted on a common drive shaft 19 which, approximately at the level of a dash-dotted line 20, denotes the feed pipes 1 Crosspieces 2 and the carrier 4 penetrates when it is inserted therein. The drive shaft 19 has at its end assigned to the carrier 4 an actuating lever 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 sov/ie 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 v/ie oder kleiner ist als der Durchmesser des benachbarten Klappenabschnitts 23. Im Unterschied dazu sind die Durchmesser der anderen La- gerabschnitte 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 Lagerab- schnitt 28 den größten Durchmesser aufweist.The drive shaft 19 has for each throttle valve 18 an axially extending flap section 23 and / or a plurality of bearing sections 24, 25, 26, 27, 28, which also extend axially and two of which axially delimit a flap section 23. Corresponding to the special design shown here, the flap sections 23 each have the same diameter. The bearing section 24, which is formed on the axial end of the drive shaft 19 facing away from the actuating lever 21, preferably has a diameter which is equal to or smaller than the diameter of the adjacent flap section 23. In contrast to this, the diameters are other countries gerabschnitte 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, the diameters of the bearing sections 24 to 28 differing from one another such that the diameters along the Drive shaft 19 in the direction of the actuating lever 21 to become larger. Accordingly, the bearing section 24 formed on the end facing away from the actuating lever 21 has the smallest diameter, while the bearing section 28 formed on the end facing the actuating lever 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 O-Ring einge- setzt 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 boss 3 and in the connecting webs 2 and in the carrier 4 are formed coaxially to the line 20, here not visible bearing openings, which are complementary to the bearing sections 24 to 28, so that the drive shaft 19 coaxial with the dash-dotted line 20 in the assembly Feed pipes 1, connecting webs 2, bearing shoulder 3 and carrier 4 can be inserted. It is clear that the above-mentioned bearing openings are matched to the diameter of the bearing sections 24 to 28 in such a way that on the one hand the drive shaft 19 can be pivoted and that on the other hand an adequate seal between the individual feed pipes 1 can be ensured. Additional sealing means can only be assigned to the position section 28 which is assigned to the end of the drive shaft 19 which has the actuating lever 21. For example, this bearing section 28 contains an annular groove 29 into which, for example, an O-ring is inserted. can be set. The bearing opening contained in the bearing projection 3 is closed on one side for a hermetic seal, so that the associated bearing section 24 penetrates axially 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 .The above-described construction of the drive shaft 19 makes it easier to combine the feed pipes 1, the connecting webs 2, the bearing boss 3 and the carrier 4 to form an injection-molded component, since a mandrel of the injection mold can be designed in a manner corresponding to the drive shaft 19 and thereby the injection molding is particularly easy to pull out of the component. In addition, the introduction of the drive shaft 19 into the injection molded component is simplified.
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 Hochdruckzufuhrungsleitung 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 Hochdruckzufuhrungsleitung 5 zugewandten Seite sattelförmige Sitze 31 ausgebildet, deren Kontur im wesentlichen komplementär zur Außenkontur der Hochdruckzufuhrungsleitung 5 geformt ist. Hierdurch ist das Nieder- halterbauteil 32 auf die Hochdruckzufuhrungsleitung 5 aufsetzbar und kann daran gehaltert werden. Diese Halterung ist beispielsweise durch eine Schweißverbindung oder Lotverbindung zwischen dem Niederhalterbauteil 32 und der Hochdruckzufuhrungsleitung 5 realisierbar. Ebenso können die Sitze 31 so geformt sein, daß sich ein Klemmsitz zwischen der Hochdruckzufuhrungsleitung 5 und den darauf aufgesetzten bzw. aufgesteckten Niederhaltern 7 ausbildet.3 shows another embodiment of the invention, which essentially differs from the embodiment shown in FIGS. 1 and 2 in that the hold-down device 7 and the high-pressure supply line 5 are not formed in one piece with one another but as separate components. All hold-downs 7 are combined to form a one-piece hold-down component 32. In this special embodiment, the hold-down 7 are formed without the retaining rings 8 (see FIGS. 1 and 2), but essentially consist only of the holding webs 11, which overlap the connecting webs 2 for fixing the feed pipes 1. Saddle-shaped seats 31 are formed on the hold-down devices 7 and on the holding webs 11 on a side facing the high-pressure supply line 5, the contour of which seats is shaped essentially complementary to the outer contour of the high pressure supply line 5. As a result, the hold-down component 32 can be placed on the high-pressure supply line 5 and can be held thereon. This holder can be implemented, for example, by a welded connection or solder connection between the hold-down component 32 and the high-pressure supply line 5. Likewise, the seats 31 can be shaped in such a way that a clamped fit is formed between the high-pressure supply line 5 and the hold-down devices 7 placed or attached thereon.
Durch die separate Ausbildung der Niederhalter 7 und der Hochdruckzufuhrungsleitung 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 device 7 and the high-pressure supply line 5, different manufacturing materials and / or manufacturing methods can be used for the separate components, which are optimized with regard to the respective component function and requirements.
Bei der in Fig. 3 gezeigten Ausfuhrungsform sind an den Zufuhrungsrohren 1 sowie an den Verbindungsstegen 2 an einer, der Hochdruckzufuhrungsleitung 5 zugewandten Seite ebenfalls sattelförmige Sitze 33 ausgebildet, in denen die Hochdruckzufuhrungsleitung 5 beim Anbau am Motorblock zur Anlage kommt. Zweckmäßigerweise sind auch diese Sitze 33 hinsichtlich ihrer Kontur an die Außenkontur der Hochdruckzufuhrungsleitung 5 angepaßt.In the embodiment shown in FIG. 3, saddle-shaped seats 33 are also formed on the feed pipes 1 and on the connecting webs 2 on a side facing the high-pressure feed line 5, in which the high-pressure feed line 5 comes to rest when attached to the engine block. Appropriately, these seats 33 are also adapted in terms of their contours to the outer contours of the high-pressure supply line 5.
Bei der Ausfuhrungsform gemäß Fig. 3 sind die Stutzfuße 12 an den Zufuhrungsrohren 1 bzw. an den Verbindungsstegen 2 ausgebildet. Da die Zufuhrungsrohre 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 Hochdruckzufuhrungsleitung 5 durch das Niederhalterbauteil 32 an den Zuführungsrohren 1 fixiert, wobei die Hochdruckzufuhrungsleitung 5 in den zugehörigen Sitzen 31 und 33 zur Anlage kommt. Vorzugsweise wird dazu zunächst das Niederhalterbauteil 32 an der Hochdruckzufuhrungsleitung 5 fixiert, beispielsweise durch einen Klemmsitz. Anschlie- ßend wird die durch Niederhalterbauteil 32 und Hochdruckzufuhrungsleitung 5 gebildete Baugruppe auf die Baugruppe aus Zuführungsrohren 1, Verbindungsstegen 2 und Stützfüßen 12 aufgesetzt .3, the support feet 12 are formed on the feed pipes 1 and on the connecting webs 2. Since the feed pipes 1, the connecting webs 2 and the support feet 12 formed thereon are expediently made of plastic, plug sleeves 34, preferably made of metal, are inserted into the through openings 13 of the support feet 12 in order to be able to better absorb the fastening forces. The receptacles 34 are equipped at their end facing the engine block with a radially outwardly projecting collar 35, which serves as an abutment or stop when the receptacle 34 is inserted into the through opening 13. The plug-in sleeves 34 are dimensioned such that when they are completely inserted into the associated through-openings 13 they protrude from the through-opening 13 with their end facing the hold-down component 32. Plug-in openings 36 are formed on the hold-down devices 7 and can be plugged onto these projecting ends of the plug-in sleeves 34. These plug-in openings 36 are preferably matched to these plug-in sleeves 34 in such a way that a press fit is formed between them, which ensures that the hold-down component 32 is held automatically on the plug-in sleeves 34 and thus on the assembly formed by the feed pipes 1, the connecting webs 2 and the support feet 12 , This enables a very advanced pre-assembly to be carried out, which does not require any additional auxiliary screws or other releasable fastening means. For this preassembly, the high-pressure supply line 5 is thus fixed by the hold-down component 32 to the supply pipes 1, the high-pressure supply line 5 coming to rest in the associated seats 31 and 33. For this purpose, the hold-down component 32 is preferably first fixed to the high-pressure supply line 5, for example by a clamp fit. subse- The assembly formed by hold-down component 32 and high-pressure supply line 5 is placed on the assembly of supply pipes 1, connecting webs 2 and support feet 12.
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 Hochdruckzufuhrungsleitung 5 und die Zuführungsrohre 1 gegen den Motorblock. The unit thus preassembled can then simply be attached to the engine block by screwing the hold-down devices 7 onto the engine block with screws. The hold-down devices 7 simultaneously clamp the high-pressure feed line 5 and the feed pipes 1 against the engine block.

Claims

Ansprüche Expectations
1. Kolbenmotor mit einem Motorblock, der mehrere Zylinder enthalt, mit einer Frischgaszufuhrung, die mehrere, den Zylindern zugeordnete, am Motorblock festgelegte Zufuhrungsrohre (1) aufweist, und mit einer Kraftstoffeinspritzanlage, die eine den Zylindern zugeordnete Hochdruckzufuhrungsleitung (5) aufweist, dadurch gekennzeichnet, daß an der Hochdruckzufuhrungsleitung (5) Niederhalter (7) für die Zufuhrungsrohre (1) ausgebildet sind, so daß die am Motorblock befestigte Hochdruckzufuhrungsleitung (5) die Zuführungsrohre (1) am Motorblock festlegt.1. Piston engine with an engine block containing a plurality of cylinders, with a fresh gas supply, which has a plurality of supply pipes (1) assigned to the cylinders and fixed to the engine block, and with a fuel injection system, which has a high-pressure supply line (5) assigned to the cylinders that hold-down devices (7) for the feed pipes (1) are formed on the high-pressure feed line (5), so that the high-pressure feed line (5) attached to the engine block defines the feed pipes (1) on the engine block.
2. Kolbenmotor nach Anspruch 1, dadurch gekennzeichnet, daß die Zufuhrungsrohre (1) aus Kunststoff und die Hochdruckzufuhrungsleitung (5) aus Metall bestehen.2. Piston engine according to claim 1, characterized in that the supply pipes (1) made of plastic and the high pressure supply line (5) consist of metal.
3. Kolbenmotor nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Niederhalter (7) für jedes Zufuhrungsrohr (1) einen das Zufuhrungsrohr (1) umfassenden Haltering (8) aufweisen.3. Piston engine according to claim 1 or 2, characterized in that the hold-down device (7) for each feed pipe (1) has a feed pipe (1) comprising retaining ring (8).
4. Kolbenmotor nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zwei benachbarte Zufuhrungsrohre (1) durch einen Verbindungssteg (2) aneinander befestigt sind, wobei die Niederhalter (7) mindestens einen diesen Verbindungssteg (2) übergreifenden Haltesteg (11) aufweisen.4. Piston engine according to one of claims 1 to 3, characterized in that two adjacent feed pipes (1) are fastened to one another by a connecting web (2), the hold-down devices (7) having at least one holding web (11) overlapping this connecting web (2).
5. Kolbenmotor nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß an der Hochdruckzufuhrungsleitung (5) und/oder an den Niederhaltern (7) Stutzfuße (12) ausgebildet sind, die jeweils eine Durchgangso fnung (13) für eine Schraube enthalten, wobei die Hochdruckzufuhrungsleitung (5) durch Anschrauben der Stutzfüße (12) am Motorblock befestigt ist.5. Piston engine according to one of claims 1 to 4, characterized in that support feet (12) are formed on the high-pressure supply line (5) and / or on the hold-down devices (7), each of which contains a passage opening (13) for a screw, the high pressure supply line (5) being fastened to the engine block by screwing on the support feet (12).
6. Kolbenmotor nach Anspruch 5, dadurch gekennzeichnet, daß am Zufuhrungsrohr (1) an einem dem Motorblock zugewandten Ende ein Flansch (17) ausgebildet ist, an dem sich mindestens einer der Stutzfüße (12) abstutzt, v/obei der Flansch (17) eine Öffnung (30) enthalt, die mit der Durchgangsόff- nung (13) des Stutzfusses (12) fluchtet.6. Piston engine according to claim 5, characterized in that a flange (17) is formed on the feed pipe (1) at an end facing the engine block, on which at least one of the support feet (12) is supported, v / obei the flange (17) contains an opening (30) which is aligned with the passage opening (13) of the support foot (12).
7. Kolbenmotor nach Anspruch 6, dadurch gekennzeichnet, daß der Stutzfuß (12) eine Stutzplatte (14) aufweist, mit der sich der Stutzfuß (12) am Flansch (17) abstutzt.7. Piston engine according to claim 6, characterized in that the support foot (12) has a support plate (14) with which the support foot (12) is supported on the flange (17).
8. Kolbenmotor nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß der Stützfuß (12) an einem dem Motorblock zugewandten Ende eine Zylinderbuchse (15) aufweist, die in die Öffnung (30) im Flansch (17) eindringt.8. Piston engine according to claim 6 or 7, characterized in that the support foot (12) at one end facing the engine block has a cylinder sleeve (15) which penetrates into the opening (30) in the flange (17).
9. Kolbenmotor nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß mehrere Zuführungsrohre (1) zu einem Spritzgußbauteil zusammengefaßt sind.9. Piston engine according to one of claims 1 to 8, characterized in that a plurality of feed pipes (1) are combined to form an injection molded component.
10. Kolbenmotor nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Niederhalter (7) einteilig mit der Hochdruckzufuhrungsleitung (5) ausgebildet sind.10. Piston engine according to one of claims 1 to 9, characterized in that the hold-down device (7) is formed in one piece with the high-pressure supply line (5).
11. Kolbenmotor nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß Niederhalter (7) und Hochdruckzufuhrungsleitung (5) als separate Bauteile ausgebildet sind.11. Piston engine according to one of claims 1 to 9, characterized in that hold-down device (7) and high pressure supply line (5) are designed as separate components.
12. Kolbenmotor nach Anspruch 11, dadurch gekennzeichnet, daß mehrere Niederhalter (7) zu einem einteiligen Bauteil (32) zusammengefaßt sind.12. Piston engine according to claim 11, characterized in that several hold-down devices (7) are combined to form a one-piece component (32).
13. Kolbenmotor nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß die Niederhalter (7) an der Hochdruckzufuhrungsleitung (5) gehaltert sind. 13. Piston engine according to claim 11 or 12, characterized in that the hold-down device (7) on the high-pressure supply line (5) are held.
14. Kolbenmotor nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, daß an den Niederhaltern (7) und/oder an den Zuführungsrohren (1) sattelförmige Sitze (31,33) ausgebildet sind, die bei am Motorblock befestigter Hochdruckzufuhrungsleitung (5) an dieser anliegen.14. Piston engine according to one of claims 11 to 13, characterized in that saddle-shaped seats (31, 33) are formed on the hold-down devices (7) and / or on the feed pipes (1), which are attached to the high-pressure feed line (5) attached to the engine block this concern.
15. Kolbenmotor nach einem der Ansprüche 1 bis 14, gekennzeichnet durch folgende Merkmale : jedes Zuführungsrohr (1) enthält eine Drosselklappe (18), die Drosselklappen (18) sind auf einer gemeinsamen Antriebswelle (19) drehfest angebracht, die Antriebswelle (19) weist in Achsrichtung abwechselnd Klappenabschnitte (23) und Lagerabschnitte (24,25,26,27,28) auf, jeder Lagerabschnitt (24,25,26,27,28) weist einen in Achsrichtung konstanten Durchmesser auf, wobei jeder Lagerabschnitt einen anderen Durchmesser aufweist, derart, daß die Durchmesser der Lagerabschnitte in Achsrichtung zunehmen.15. Piston engine according to one of claims 1 to 14, characterized by the following features: each feed tube (1) contains a throttle valve (18), the throttle valves (18) are rotatably mounted on a common drive shaft (19), the drive shaft (19) in the axial direction alternately flap sections (23) and bearing sections (24,25,26,27,28), 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 diameter of the bearing sections increase in the axial direction.
16. Kolbenmotor nach Anspruch 15, dadurch gekennzeichnet, daß der kleinste Durchmesser der Lagerabschnitte (24,25,26,27,28) gleich groß ist wie oder größer ist als der Durchmesser des benachbarten Klappenabschnitts (23) und daß die Durchmesser der anderen Lagerabschnitte größer sind als die Durchmesser der Klappenabschnitte (23) . 16. Piston engine according to claim 15, characterized in that the smallest diameter of the bearing sections (24,25,26,27,28) is the same size as or larger than the diameter of the adjacent flap section (23) and that the diameter of the other bearing sections are larger than the diameter of the flap sections (23).
17. Kolbenmotor nach Anspruch 15 oder 16, dadurch gekennzeichnet, daß die Klappenabschnitte (23) jeweils denselben Durchmesser aufweisen.17. Piston engine according to claim 15 or 16, characterized in that the flap sections (23) each have the same diameter.
18. Kolbenmotor nach einem der Ansprüche 15 bis 17, dadurch gekennzeichnet, daß zwischen benachbarten Zuführungsrohren (1) jeweils ein Verbindungssteg (2) ausgebildet ist, durch den sich die Antriebswelle (19) erstreckt, wobei jeder Verbindungssteg (2) eine Lageröffnung enthält, die komplementär zum zugeordneten Lagerabschnitt (25,26,27) der Antriebswelle (19) ausgebildet ist . 18. Piston engine according to one of claims 15 to 17, characterized in that between adjacent feed pipes (1) in each case a connecting web (2) is formed through which the drive shaft (19) extends, each connecting web (2) containing a bearing opening, which is complementary to the associated 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
DE19962987 1999-12-24
DE19962987A DE19962987A1 (en) 1999-12-24 1999-12-24 Piston engine
PCT/DE2000/004579 WO2001048368A1 (en) 1999-12-24 2000-12-21 Piston engine

Publications (2)

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

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ID=7934487

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

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

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Also Published As

Publication number Publication date
DE19962987A1 (en) 2001-07-05
WO2001048368A1 (en) 2001-07-05
JP2003518582A (en) 2003-06-10
JP4571770B2 (en) 2010-10-27
US6619256B2 (en) 2003-09-16
DE50005560D1 (en) 2004-04-08
US20030106525A1 (en) 2003-06-12
EP1240423B1 (en) 2004-03-03

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