EP1402155B1 - Vorrichtung zur entlüftung eines kurbelgehäuses einer brennkraftmaschine - Google Patents

Vorrichtung zur entlüftung eines kurbelgehäuses einer brennkraftmaschine Download PDF

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Publication number
EP1402155B1
EP1402155B1 EP02758291A EP02758291A EP1402155B1 EP 1402155 B1 EP1402155 B1 EP 1402155B1 EP 02758291 A EP02758291 A EP 02758291A EP 02758291 A EP02758291 A EP 02758291A EP 1402155 B1 EP1402155 B1 EP 1402155B1
Authority
EP
European Patent Office
Prior art keywords
valve
cylinder head
manifold
head cover
intake manifold
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
EP02758291A
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English (en)
French (fr)
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EP1402155A1 (de
Inventor
Gilles Basset
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.)
Mann and Hummel GmbH
Original Assignee
Mann and Hummel GmbH
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Filing date
Publication date
Application filed by Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Publication of EP1402155A1 publication Critical patent/EP1402155A1/de
Application granted granted Critical
Publication of EP1402155B1 publication Critical patent/EP1402155B1/de
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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/0011—Breather valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • F01M13/023—Control valves in suction conduit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/0011—Breather valves
    • F01M2013/0016—Breather valves with a membrane

Definitions

  • the present invention relates to a rebreathing circuit of the crankcase gases of an internal combustion engine.
  • a primary circuit which connects the stitching of the crankcase gases to the air intake pipe downstream of the throttle, and which operates mainly at low speed, when the throttle valve is (almost) closed
  • a secondary circuit which connects the stitching of the crankcase gases to the air filter, and which operates mainly at high speed, when the throttle is open.
  • a vacuum limiter diaphragm valve
  • the patent application EP 724206 proposes an improved circuit comprising a diaphragm valve provided with a mouthpiece that can be connected to the stitching of the casing gases and another mouthpiece that can be mounted directly on the intake manifold.
  • a circuit always involves fixing a separate part on the collector during assembly of the vehicle, with the risk of leakage resulting therefrom.
  • it is relatively heavy and expensive and is not further optimized for a given engine, the valve being a standard valve with a wide range of use.
  • the subject of the present invention is therefore a circuit for re-sucking the crankcase gases of an internal combustion engine, which minimizes the number of parts to be assembled during assembly of the vehicle, thus also minimizing the risk of leaks, and of which it is easy to optimize the design according to a given engine.
  • the present invention therefore relates to a rebreathing circuit of the crankcase gases of an internal combustion engine equipped with an intake manifold provided with a throttle body and a cylinder head cover, in which a valve makes it possible to regulate at least in part the rate of re-suction of the crankcase gases, said valve comprising a spring and a membrane which divides the valve into two separate compartments, one communicating with the atmosphere and the other with the downstream intake manifold of the throttle body and with a crankcase gas tapping, characterized in that the compartment communicating with the manifold and with the crankcase gas tapping is integrated with the intake manifold and / or the cylinder head cover, and that the membrane makes it possible to seal a portion of the collector and / or the head cover towards the atmosphere and that a ventilation hole is in the housing.
  • An internal combustion engine is understood to mean an internal combustion engine comprising at least one cylinder in which a reciprocating piston which is converted into rotational movement by means of a crank-rod circuit and in which Chemical energy from burning a fuel is transformed into kinetic rotational energy of a tree.
  • the present invention applies to any type of internal combustion engine, but preferably to vehicle engines and in particular gasoline motor vehicles which comprise an intake manifold provided with a throttle body whose purpose is to regulate the supply of combustion air to the engine cylinder.
  • These engines are also equipped with a crankcase that includes the lubricating oil and a cylinder head cover that covers the engine cylinder head (where the oil is injected) and that seals and a thermal insulation and phonic with respect to the outside.
  • the housing and the cylinder head cover generally communicate with each other and constitute a circuit in which the crankcase gases circulate.
  • these gases are taken in the circuit casing / cylinder head cover by means of a stitching generally carried out at its upper part.
  • the valve which regulates the rate of re-suction of the crankcase gases is a diaphragm valve, that is to say that it comprises a membrane and a spring whose relative movement leads either to the opening or shutting a communication between the stitching of the crankcase gases and the collector.
  • the membrane divides the valve into two compartments: one communicating with the atmosphere, and the other with the intake manifold and the crankcase venting.
  • the membrane is also used to ensure the sealing of a portion of the collector and / or the cylinder head cover to the atmosphere and in doing so, saves material (the wall of the collector and / or the cylinder head cover being interrupted at this point).
  • the present invention advantageously makes it possible to eliminate the secondary rebreathing circuit by means of adequate sizing, which will be detailed hereinafter.
  • the entire re-suction flow rate is regulated by the valve described above.
  • the collector (1) and the cylinder head cover are separate parts and the valve is integrated in the collector.
  • the compartment (2) communicating with the manifold (1) and the stitching of the crankcase gases (not shown) via a connecting pipe (3) is integrated in the intake manifold, the membrane (4) serving to both to ensure the sealing of the collector and to regulate the re-aspiration flow, together with the spring (5).
  • the membrane (4) serving to both to ensure the sealing of the collector and to regulate the re-aspiration flow, together with the spring (5).
  • the dimensioning of the elements of this valve is optimized according to a given engine to allow its direct integration with the intake manifold.
  • Such optimization makes it possible to greatly reduce the size of the membrane and to ensure good regulation for all operating points of the engine.
  • the circuit according to this variant of the invention is reduced to the essential: it essentially comprises a diaphragm / spring pair, a housing (7), a coupling to the stitching of the crankcase gases (3) and fastening means (such as clamps) of this connection respectively on the valve and on the stitching (not shown).
  • the housing (7) can be fixed in any suitable manner on the manifold, for example by clipping or welding.
  • the membrane may comprise a reinforcement (8) at its center, where it comes into contact with the orifice to the manifold (9), this orifice being in fact generally the end of a manifold.
  • the reinforcement may be an insert, preferably made of a more rigid material than that constituting the membrane.
  • the manifold and the cylinder head cover are also separate parts, but the valve is this time integrated into the cylinder head cover.
  • the volume (1) of Figure 1 is the volume between the cylinder head and the cylinder head cover, and the connector (3) this time connects the valve to the collector, all other things being equivalent to those according to the first variant described.
  • the intake manifold and the cylinder head cover are integrated, that is to say that they comprise at least one common wall.
  • This variant illustrated in a nonlimiting manner in FIG. 2, makes it possible to further reduce the number of parts compared with the other variants, since it makes it possible to save the connection either towards the stitching of the crankcase gases (variant 1) or towards the collector (variant 2) and the fastening means of this connection. Indeed, it is sufficient to position the saddle valve on the manifold and on the cylinder head cover and to allow direct tapping of the crankcase gases under the cylinder head cover, via a hole (10) in the lower part of the housing (7). ) located under the cylinder head cover.
  • (1) represents the internal volume of the intake manifold and (1 ') represents the volume between the cylinder head and the cylinder head cover.
  • Such a fully integrated circuit (collector, cylinder head cover and rebreathing circuit) has only one element to fix during assembly of the vehicle and as it is optimized according to each type of engine, it reduces to the maximum releases to the atmosphere while reducing the weight and size of parts.
  • the constituent materials of the circuit elements according to the invention are chosen according to their weight, their mechanical strength and their workability, according to their function and design.
  • plastic materials in particular to reduce the weight of the assembly and facilitate its realization, it may be advantageous to choose plastic materials as soon as possible, that is to say for most parts, except perhaps be spring loaded and clamps.
  • the membrane and the connection to the quilting are preferably based on an elastomer (such as a silicone, fluoro-silicone or acrylic modified (ACM) rubber), and preferably, a fluoroelastomer if the environment requires it; Clamps and spring are often made of an environmentally resistant metal under the bonnet and salty mists; and the valve housing is advantageously based on a thermoplastic material such as a polyamide or a polyolefin, but preferably a polyamide. This plastic is preferably reinforced by means of a filler such as glass fibers.
  • the casing is generally made by molding, the injection molding being particularly suitable.
  • the present invention also relates to an integrated intake manifold for an internal combustion engine, said manifold integrating the valve of the circuit according to the first variant of the invention.
  • the present invention furthermore relates to an integrated cylinder head cover for an internal combustion engine, said cylinder head cover incorporating the valve of the circuit according to the second variant of the invention.
  • the present invention also relates to an integrated intake manifold / cylinder head cover for an internal combustion engine, said manifold / valve cover incorporating the valve of the circuit according to the third variant of the invention.
  • the present invention also relates to a method for the design of a casing gas rebreathing circuit of an internal combustion engine as described above.
  • This method consists in optimizing the parameters (geometry, materials, etc.) of the valve described above according to the operating parameters of an engine, thanks to the use of an engine bench.
  • engine bench is meant to designate a test bench that allows, depending on the characteristic points of the engine (speed and torque function) to impose a crankcase suction flow rate and a vacuum on admission. We then measure the value of the depression at the crankcase and compare the value with that of the specifications of the vehicle manufacturer.
  • the present invention finally relates to a diaphragm valve for a rebreathing circuit, an intake manifold and / or an integrated cylinder head cover as described above, this valve being preferably mainly made of plastic.
  • mainly plastic is meant that the valve housing is made of plastic material, preferably injection moldable (such as polyamide or polyolefin, optionally filled with glass fibers), and that the The membrane is also made of plastic but preferably of a silicone elastomer or not, optionally fluorinated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Claims (6)

  1. Kreislauf für die Rückführung von Kurbelgehäuse-Emissionen in einem Verbrennungsmotor, ausgestattet mit einem Ansaugkrümmer mit Drosselklappengehäuse und Zylinderkopfhaube, in welcher ein Schieberventil mindestens einen Teil des Durchsatzes der Rückführung von Kurbelgehäuse-Emissionen regulieren kann, wobei das Schieberventil eine Feder und eine Membrane (4) beinhaltet, welche das Schieberventil in zwei unterschiedliche Kammern aufteilt, von denen die eine mit der Atmosphäre und die andere mit dem dem Drosselklappengehäuse nachgelagerten Ansaugkrümmer kommuniziert und mit einem Anschluss für die Kurbelgehäuse-Emissionen, und die mit dem Krümmer und dem Anschluss für die Kurbelgehäuse-Emissionen kommunizierende Kammer ist in dem Ansaugkrümmer und/oder in der Zylinderkopfhaube integriert, dadurch gekennzeichnet, dass die Membrane die Dichtigkeit eines Teils des Krümmers und/oder der Zylinderkopfhaube zur Atmosphäre sicherstellt und dass die Belüftungsöffnung sich in dem Gehäuse (7), welches die Membrane (4) enthält, befindet.
  2. Kreislauf nach obigem Anspruch, dadurch gekennzeichnet, dass die Gesamtheit des Durchsatzes der Rückführung mit dem Schieberventil reguliert werden kann.
  3. Kreislauf nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Krümmer und die Zylinderkopfhaube separate Teile sind und dass das Schieberventil im Krümmer integriert ist.
  4. Kreislauf nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Krümmer und die Zylinderkopfhaube separate Teile sind und dass das Schieberventil in der Zylinderkopfhaube integriert ist.
  5. Kreislauf nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Ansaugkrümmer und die Zylinderkopfhaube mindestens eine gemeinsame Wand haben und dass das Schieberventil sowohl auf dem Krümmer als auch auf der Zylinderkopfhaube positioniert ist, um so einen direkten Anschluss für die Kurbelgehäuse-Emissionen unter der Zylinderkopfhaube zu erreichen.
  6. Integrierter Ansaugkrümmer für Verbrennungsmotoren, dadurch gekennzeichnet, dass er das Schieberventil des Kreislauf nach einem der Ansprüche 1 bis 3 integriert.
EP02758291A 2001-07-02 2002-07-02 Vorrichtung zur entlüftung eines kurbelgehäuses einer brennkraftmaschine Expired - Lifetime EP1402155B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0108789 2001-07-02
FR0108789A FR2826691B1 (fr) 2001-07-02 2001-07-02 Circuit de reaspiration des gaz de carter d'un moteur a combustion interne
PCT/EP2002/007265 WO2003004836A1 (fr) 2001-07-02 2002-07-02 Circuit de reaspiration des gaz de carter d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1402155A1 EP1402155A1 (de) 2004-03-31
EP1402155B1 true EP1402155B1 (de) 2007-12-12

Family

ID=8865052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02758291A Expired - Lifetime EP1402155B1 (de) 2001-07-02 2002-07-02 Vorrichtung zur entlüftung eines kurbelgehäuses einer brennkraftmaschine

Country Status (6)

Country Link
US (1) US20040211400A1 (de)
EP (1) EP1402155B1 (de)
AT (1) ATE380927T1 (de)
DE (1) DE60224042D1 (de)
FR (1) FR2826691B1 (de)
WO (1) WO2003004836A1 (de)

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AU2005304879B2 (en) 2004-11-05 2010-02-04 Donaldson Company, Inc. Filter medium and structure
EP1846136A2 (de) 2005-02-04 2007-10-24 Donaldson Company, Inc. Aerosol abscheider
ATE442893T1 (de) 2005-02-22 2009-10-15 Donaldson Co Inc Aerosolabscheider
US7999994B2 (en) 2005-02-23 2011-08-16 Pixtronix, Inc. Display apparatus and methods for manufacture thereof
US9082353B2 (en) 2010-01-05 2015-07-14 Pixtronix, Inc. Circuits for controlling display apparatus
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US9229222B2 (en) 2005-02-23 2016-01-05 Pixtronix, Inc. Alignment methods in fluid-filled MEMS displays
US8519945B2 (en) 2006-01-06 2013-08-27 Pixtronix, Inc. Circuits for controlling display apparatus
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US8310442B2 (en) 2005-02-23 2012-11-13 Pixtronix, Inc. Circuits for controlling display apparatus
US9158106B2 (en) 2005-02-23 2015-10-13 Pixtronix, Inc. Display methods and apparatus
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US8526096B2 (en) 2006-02-23 2013-09-03 Pixtronix, Inc. Mechanical light modulators with stressed beams
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Also Published As

Publication number Publication date
EP1402155A1 (de) 2004-03-31
FR2826691B1 (fr) 2003-09-26
ATE380927T1 (de) 2007-12-15
FR2826691A1 (fr) 2003-01-03
US20040211400A1 (en) 2004-10-28
DE60224042D1 (de) 2008-01-24
WO2003004836A1 (fr) 2003-01-16

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