EP3643890A1 - Soupaperie pour au moins une soupape à levée d'un moteur à combustion interne - Google Patents

Soupaperie pour au moins une soupape à levée d'un moteur à combustion interne Download PDF

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Publication number
EP3643890A1
EP3643890A1 EP19204262.0A EP19204262A EP3643890A1 EP 3643890 A1 EP3643890 A1 EP 3643890A1 EP 19204262 A EP19204262 A EP 19204262A EP 3643890 A1 EP3643890 A1 EP 3643890A1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel
combustion engine
valve lever
lever axis
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.)
Withdrawn
Application number
EP19204262.0A
Other languages
German (de)
English (en)
Inventor
Sebastian Müller
Peter Bogdanski
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.)
MAN Truck and Bus SE
Original Assignee
MAN Truck and Bus SE
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 MAN Truck and Bus SE filed Critical MAN Truck and Bus SE
Publication of EP3643890A1 publication Critical patent/EP3643890A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
    • F02F2001/246—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis and orientated radially from the combustion chamber surface
    • 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
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet

Definitions

  • the invention relates to a valve train for at least one lift valve of an internal combustion engine.
  • the invention further relates to an internal combustion engine and a motor vehicle with such a valve train.
  • common rail systems are known from the prior art, which are also referred to as accumulator injection systems.
  • the term common rail here refers to a high-pressure distributor for the fuel.
  • pressure generation and fuel injection are decoupled from one another.
  • a separate high pressure pump continuously generates pressure.
  • This pressure which is built up regardless of the injection sequence, is permanently available in the fuel line.
  • the statically compressed fuel is stored in a rail, the so-called rail, and distributed to the injectors of a cylinder bank via pressure lines.
  • This rail is usually attached to the outside of the cylinder head as a separate component. Appropriate installation space is therefore required for this. In the case of drive units in particular, where not only one rail, but a second or more are required, the question arises as to how these can be arranged in a space-saving manner.
  • the object of the invention is in particular to enable a possibility of fuel distribution which takes up less installation space.
  • a fuel distributor for receiving fuel under pressure also referred to here as the rail of the fuel supply, is integrated into a valve lever axis of a valve train.
  • a valve train for at least one lift valve preferably for actuating at least one charge exchange valve of an internal combustion engine, which comprises a valve lever for actuating the at least one lift valve and a valve lever axis, on which the valve lever is pivotally mounted.
  • a fuel distributor for receiving fuel under pressure is integrated in the valve lever axis.
  • at least one fuel rail for receiving pressurized fuel i. H. at least one rail of the common rail system, at least in sections within the valve lever axis.
  • the valve lever axis for forming the fuel distributor can have a cavity for receiving fuel under pressure, preferably an axially extending cavity.
  • This cavity can have a pressure pipe running inside the valve lever axis for receiving fuel under pressure.
  • the axis of the valve train is thus designed so that it can function as a rail.
  • the valve train fulfills a double function, namely it serves to mount the valve lever and serves as a fuel distributor, e.g. B. as a pressure pipe for a fuel medium.
  • a fuel distributor is provided, which at the same time takes over a bearing function of the valve train.
  • the integration of multiple functions in such a component is particularly space-saving or at least space-neutral, if an additional rail, z. B. a second rail to be provided.
  • a conventional rail can be saved as a separate component, which also enables a cost reduction.
  • Another advantage is the shorter high-pressure lines to the injector compared to a conventional fuel distributor if the fuel distributor is integrated directly into the valve lever axis.
  • a particular advantage of this is that there is less pressure pulsation and less pressure-loaded material, which means that the costs for these components are lower.
  • the resulting arrangement also offers the possibility of designing the pressure lines as identical parts.
  • the invention provides for a smaller number of components and the avoidance of the charge air collector performing them in certain drive unit configurations. Due to the fact that most rocker arm axles have a significantly larger outer diameter than common rails, costly post-treatments such as autofrettage could be avoided. If the rocker arm axle is designed as a separate axle, autofrettage is still possible.
  • the fuel distributor can have connections for high-pressure lines and / or can be connected to at least one fuel pressure line.
  • the fuel distributor can have branch connections, to each of which a pressure line that is in fluid communication with an injector of the internal combustion engine can be connected and / or connected.
  • Such branch connections can be designed, for example, as branch bores, each with a sealing seat, to which a branch line is connected and / or can be connected.
  • the branch connections can be arranged on an outside of the valve lever axis. It is particularly advantageous here if these are arranged on a side of the valve lever axis facing an injector of the internal combustion engine, in order to enable the shortest possible fuel supply. There is also the possibility that the branch connections comprise a welded socket in order to securely fasten them.
  • the valve lever can be designed as a rocker arm or as a rocker arm.
  • valve lever axis can have a lubricating oil bore for receiving lubricating oil.
  • the valve lever axis can thus have both a lubricating oil hole and the fuel rail.
  • the fuel distributor can have an axially extending section and the lubricating oil bore can run at least in sections in the axial direction of the valve lever axis and can be fluidly separated from the fuel distributor.
  • an internal combustion engine in particular a diesel engine, comprising a valve train as described in this document, i. H. with integrated rail.
  • the internal combustion engine further comprises a fuel supply system for supplying fuel to injectors of the internal combustion engine, a fuel distributor for receiving fuel under pressure from the fuel system being integrated at least in sections into the valve lever axis of the valve train.
  • the injector of the internal combustion engine can be designed as a so-called top feed injector and / or also a side feed injector.
  • the valve lever axis and the fuel distributor integrated therein can be arranged under a cylinder head cover of the internal combustion engine.
  • the invention further comprises a motor vehicle, in particular a commercial vehicle, such as a truck or omnibus, with a valve train and / or an internal combustion engine as described in this document.
  • a motor vehicle in particular a commercial vehicle, such as a truck or omnibus, with a valve train and / or an internal combustion engine as described in this document.
  • FIG. 1 shows a perspective top view of a valve train of an internal combustion engine with top feed injectors according to an embodiment of the invention.
  • the valve train 1 is used to actuate two lift valves 2 of a diesel engine of a commercial vehicle.
  • the valve lever 3 has a valve lever axis 4 for actuating the lift valves 2, on which the valve lever 3 is pivotally mounted.
  • the valve lever is designed here as a rocker arm, for example. A rocker arm design is also possible.
  • valve lever axis 4 a rail or a fuel distributor 10 is integrated for receiving fuel under pressure.
  • the valve lever axis 4 has an axially extending cavity 11 for receiving fuel under pressure in order to form the fuel distributor 10.
  • This cavity forms a pressure pipe running inside the valve lever axis for receiving fuel under pressure.
  • the fuel distributor 10 has connections 13 for high-pressure lines and is connected to a fuel pressure line.
  • the fuel distributor has branch connections 13, which can be introduced, for example, through bores, each of which has a sealing seat for sealing.
  • Each of these branch connections 13 has an injector 5 pressure line 15 connected to the internal combustion engine in fluid connection. The pressure line is connected to the injector at the fuel line connection 16.
  • the branch connections 13 are arranged on an outside 7 of the valve lever axis, on a side of the valve lever axis facing the injectors 5 of the internal combustion engine.
  • the branch connections 13 further comprise a welded socket 14.
  • valve lever axis additionally has a lubricating oil bore 6 for receiving lubricating oil.
  • the fuel distributor 10 and the lubricating oil bore 6 each have an axially extending section, the lubricating oil bore 6 and the fuel distributor 10 being arranged offset to one another in the radial direction of the valve lever and not being in fluid communication with one another.
  • the fuel distributor 10 integrated into the valve lever axis in this way can advantageously also be arranged under a cylinder head cover of the internal combustion engine.
  • valve train is thus provided, the valve lever axis of which is designed such that it can function as a rail.
  • the valve train fulfills a double function, namely it serves to mount the valve lever and serves as a fuel distributor, e.g. B. as a pressure pipe for a fuel medium.
  • a fuel distributor e.g. B. as a pressure pipe for a fuel medium.
  • a conventional rail as a separate component can be saved. It is emphasized again that a further advantage is the shorter high-pressure lines to the injector compared to a conventional fuel distributor, since the fuel distributor runs closer to the injectors. This results in less pressure pulsation and less stress on the material, which means that the costs for these components are lower. Due to the fact that most rocker arm axles have a significantly larger outer diameter than common rails, costly post-treatments such as autofrettage could be avoided. If the rocker arm axle is designed as a separate axle, autofrettage is still possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
EP19204262.0A 2018-10-26 2019-10-21 Soupaperie pour au moins une soupape à levée d'un moteur à combustion interne Withdrawn EP3643890A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018126757.6A DE102018126757A1 (de) 2018-10-26 2018-10-26 Ventiltrieb für mindestens ein Hubventil einer Brennkraftmaschine

Publications (1)

Publication Number Publication Date
EP3643890A1 true EP3643890A1 (fr) 2020-04-29

Family

ID=68296214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19204262.0A Withdrawn EP3643890A1 (fr) 2018-10-26 2019-10-21 Soupaperie pour au moins une soupape à levée d'un moteur à combustion interne

Country Status (3)

Country Link
US (1) US20200132028A1 (fr)
EP (1) EP3643890A1 (fr)
DE (1) DE102018126757A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331504C1 (de) * 1993-09-16 1995-02-16 Daimler Benz Ag Verfahren zum Herstellen einer für Brennkraftmaschinen vorgesehenen hohlausgeführten Kipphebelachse
EP0704619A1 (fr) * 1994-09-29 1996-04-03 Mercedes-Benz Ag Dispositif d'injection de combustible pour un moteur à combustion interne multicylindre
DE102005028188A1 (de) * 2004-06-17 2006-02-02 Usui Kokusai Sangyo Kaisha Ltd., Nagasawa Verbindungsstruktur eines divergierenden Abzweigrohres in einer Kraftstoffdruckleitung für eine Brennkraftmaschine, divergierendes Abzweigrohr und Verfahren zur Herstellung des divergierenden Abzweigrohres
US20070000479A1 (en) * 2003-11-04 2007-01-04 Andrew Knight Accumulator fuel system
DE102009051065B3 (de) * 2009-10-28 2011-01-20 Benteler Automobiltechnik Gmbh Kraftstoffverteiler

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19845942A1 (de) * 1998-10-06 2000-04-13 Porsche Ag Vorrichtung zur Lagerung eines Ventiltriebes, zugeordnet einem Zylinderkopf
JP4357362B2 (ja) * 2004-05-19 2009-11-04 臼井国際産業株式会社 コモンレール用分岐接続体の継手構造
DE102008017228A1 (de) * 2008-04-04 2009-10-08 Continental Automotive Gmbh Fluidsystem

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331504C1 (de) * 1993-09-16 1995-02-16 Daimler Benz Ag Verfahren zum Herstellen einer für Brennkraftmaschinen vorgesehenen hohlausgeführten Kipphebelachse
EP0704619A1 (fr) * 1994-09-29 1996-04-03 Mercedes-Benz Ag Dispositif d'injection de combustible pour un moteur à combustion interne multicylindre
US20070000479A1 (en) * 2003-11-04 2007-01-04 Andrew Knight Accumulator fuel system
DE102005028188A1 (de) * 2004-06-17 2006-02-02 Usui Kokusai Sangyo Kaisha Ltd., Nagasawa Verbindungsstruktur eines divergierenden Abzweigrohres in einer Kraftstoffdruckleitung für eine Brennkraftmaschine, divergierendes Abzweigrohr und Verfahren zur Herstellung des divergierenden Abzweigrohres
DE102009051065B3 (de) * 2009-10-28 2011-01-20 Benteler Automobiltechnik Gmbh Kraftstoffverteiler

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Publication number Publication date
US20200132028A1 (en) 2020-04-30
DE102018126757A1 (de) 2020-04-30

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