EP1329598A1 - Soupape regolatrice de pression pour un systeme de degasage d'un moteur à combustion interne - Google Patents

Soupape regolatrice de pression pour un systeme de degasage d'un moteur à combustion interne Download PDF

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Publication number
EP1329598A1
EP1329598A1 EP02026221A EP02026221A EP1329598A1 EP 1329598 A1 EP1329598 A1 EP 1329598A1 EP 02026221 A EP02026221 A EP 02026221A EP 02026221 A EP02026221 A EP 02026221A EP 1329598 A1 EP1329598 A1 EP 1329598A1
Authority
EP
European Patent Office
Prior art keywords
membrane
housing
pressure control
ventilation valve
valve according
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
EP02026221A
Other languages
German (de)
English (en)
Other versions
EP1329598B1 (fr
Inventor
Bruno Hezel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1329598A1 publication Critical patent/EP1329598A1/fr
Application granted granted Critical
Publication of EP1329598B1 publication Critical patent/EP1329598B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

  • Internal combustion engines typically include a crankcase ventilation system that works with a pressure control valve.
  • the pressure control valve includes a deformable one Membrane made of an elastomer material.
  • the pressure control valve serves as a vent valve and has the task of keeping the internal pressure in the crankcase at a pre-adjustable level to keep as constant as possible. This is necessary to ensure the tightness of the internal combustion engine to guarantee against the escape of engine oil to the outside.
  • DE 196 42 219 A1 relates to an oil separator in a compact design. This is used in particular on internal combustion engines of motor vehicles and serves to separate oil from an oil-gas mixture.
  • an oil separating element is arranged, which as at least one, preferably helix having multiple circumferences is formed.
  • the one with the dealings The coil includes additional structures for oil separation, the coil being a central space encloses.
  • the additional structures are designed as flow ribs.
  • DE 100 08 227 A1 relates to a device with a membrane arrangement.
  • a first holding element and a second holding element are provided, which have a Flare connection are interconnected.
  • the membrane arrangement is in the range of Flare connection in its peripheral region between the first holding element and the second holding element clamped, the first holding element essentially one Has flange running parallel to the membrane arrangement, which with a circumferential End face ends.
  • the second holding element has an essentially parallel to the membrane arrangement running counter flange and a flare flap.
  • the flare connection is formed by the flare over the circumferential area of the Membrane arrangement and bent over the circumferential end surface of the first holding element is.
  • the peripheral region of the membrane arrangement projects beyond the end face of the first Holding element in the radial direction with a protruding area. In one to the End face of the first holding element and on the protruding area of the membrane arrangement and pressing space adjacent to the flare overlap of the second holding element the membrane made of elastomer material is clamped.
  • DE 197 00 733 A1 relates to a crankcase ventilation with integrated additional functions.
  • the cylinder head cover for a crankcase and a cylinder head Combustion engine having, in particular for motor vehicles, are devices integrated to separate oil.
  • the cylinder head cover Device for regulating the pressure prevailing in the crankcase It are a spiral insert for separating oil and a fine separator, the fleece, Includes wire mesh, wire wool, yarn or granules.
  • the cylinder head cover further comprises a device for regulating the pressure within the crankcase, that a membrane support, an elastic membrane, a membrane seal and has a sealing structure.
  • membranes are attached to the Pressure control / housing ventilation valves used, which are designed as an elastomer membrane are.
  • the disadvantage of this material is the strong dependence of its deformability on the temperature. At temperatures below freezing, this hardens Membrane elastomer. This affects the function of the pressure control / housing ventilation valve considerably.
  • Another disadvantage with elastomeric membranes is to see that the engine oil and fuel manufacturers often additive packages of engine oil and fuel change so that the chemical properties of each added Additive packages on the elastomer material can no longer be predicted with certainty and can be estimated.
  • thermoplastic membrane element made of thin-walled, sprayed thermoplastic material used.
  • the wall thickness of this thermoplastic membrane element is between 0.3 and 0.6 mm. This allows the use of an elastomeric membrane bypassed, thereby reducing the dependence of the deformability of the membrane on the temperature is eliminated.
  • the thermoplastic material also has a much higher chemical resistance to those added to the engine oil or fuel Additive groups.
  • the use of a thermoplastic membrane also allows There is no preload spring and a valve cover housing on which the preload spring is attached supported.
  • the membrane made of thermoplastic material can have a wavy structure be, which has the advantage that no tensile stresses at the clamping point of the thin-walled Membrane arise and only bending stresses occur due to the membrane material be included yourself. Furthermore, the membrane can be designed in a stepped form become.
  • the membrane made of thermoplastic material can by joining processes, such as for example ultrasonic welding or friction welding or also by gluing on Housing of the pressure control / housing vent valve are attached. This allows the thermoplastic membrane without additional effort and parts provision for the end-working Complete the unit on the housing.
  • an easy-to-install bending beam can now be used the thin-walled membrane made of thermoplastic material is applied, the easily in the housing of the pressure control / housing vent valve can be used.
  • Figure 1 gives the perspective view of a crankcase ventilation integrated into the cylinder head cover with sequential separation components again.
  • a cylinder head cover 1 Connected in series in a cylinder head cover 1 on an internal combustion engine Components for crankcase ventilation integrated.
  • the cylinder head cover 1 is detachable by means of fastening openings 2, which are penetrated by screws Cylinder head area of an internal combustion engine attached and can by this can be easily dismantled. Separation components are in the cavity 4 of the cylinder head cover 1 to separate droplets or aerosols from an oil / gas mixture.
  • the helix 9 comprises one or preferably several Circumstances 10 by the oil / gas flow leaving the pre-separator 5 in vertical Flow from top to bottom.
  • the cyclones 8 When flowing through the cyclones 8 sit on the bypasses or on the inside of the housing surrounding the coil 9 the cyclones 8 individual droplets, which into an overflow opening 11 Fine separator 12 overflowing oil / gas mixture are withdrawn.
  • the fine separator 12 can be a ring-shaped yarn package, a fleece, a knitted fabric, a tangle of wires or a textile covering can be provided with which aerosols leave the cyclones 8 and flowing into the fine separator 12 via the overflow 11
  • Oil / gas mixtures are withdrawn. Cleaned in the fine separator, the oil / gas mixture flows via a channel 14 into a pressure control / housing ventilation valve 15.
  • Figure 2 shows the flow of the oil / gas mixture through the oil separation in succession switched components in the cavity of a cylinder head cover.
  • the thicker arrows indicate the components 5, 8, 12 and 15 flowing through Oil / gas mixture flow, which the components connected in series to Oil separation 5, 8, 12 and 15 flows continuously and in the passage of one after the other switched separation components 5, 8, 12 and 15 a cleaning or removal experienced by oil droplets or finely dissolved aerosols.
  • the incoming oil / gas mixture flow is via Labyrinth 6 forming ribs 7 deflected several times before that from the pre-separator 5 escaping oil / gas mixture flow enters the coil 9 of a cyclone 8, the Helix 9 is preferably equipped with a plurality of passages 10.
  • the oil / gas mixture flow leaves the cyclones and enters a pre-separator 12, at the lower end of an outlet in a lubricant reservoir or the crankcase an internal combustion engine is indicated.
  • a membrane element 17 as a rule made of an elastomer material, is clamped.
  • the membrane element 17 made of elastomer material can also be clamped directly in the housing 18.
  • Figure 3 shows the schematic representation of a pressure control / housing vent valve with elastomer membrane according to the prior art.
  • the membrane element 17 as shown in FIG. 3 consists of an elastomer material, which is connected to the housing 18 via the cover designated by position 16 in FIG. 1 is clamped. At its lower end is between a flat surface of the housing 18th and a recess in the membrane element 17, a control gap 19 of approximately 1 mm is indicated.
  • the membrane element 17 is made by an expensive and complex pressure spring 20 is applied and is in the direction of the double arrow designated by reference numeral 23 movable in the vertical direction.
  • the one entering the membrane element 17 Gas flow is marked by reference numeral 21 and passes one in the plane of the Housing 18 formed inlet opening 22.
  • Figures 4 and 4.1 show a first embodiment of a membrane for a Pressure regulator / housing vent valve made of a thermoplastic material with a corrugated deformation area.
  • the fastening point 25 shown in cross section in FIG. 4, connected to the housing 18 Membrane 24 is corrugated.
  • the waveform is referenced 38 denotes and extends from the center of the membrane 24, which is molded by a Pin 32 and a molded base 26 formed in this embodiment is, in the radial direction to the periphery 35 of the membrane 24 made of thermoplastic material.
  • the membrane 24 made of thermoplastic material can due to the waveform of the membrane 24, the occurrence of impermissibly high tensile stresses are avoided, rather only bending stresses occur.
  • the membrane 24 is made pre-stressed thermoplastic material.
  • the end face of the membrane 24 made of thermoplastic Material molded foot 26 acts as a boundary surface of a control gap above the opening 22 shown in Figure 3 in the flat surface of the housing 18 of the pressure control / housing ventilation valve.
  • the membrane 24 made of thermoplastic material can be connected at its connection points 25 the inside of the housing 18 of the pressure control / housing ventilation valve by ultrasonic welding or attached using a friction welding process. Furthermore lets the peripheral surface 35 of the membrane 24 made of thermoplastic material in wave form glue to the housing 18.
  • the membrane made of thermoplastic material 24 can thus become an end-functioning one without additional effort and parts provision Unit on the housing 18 can be completed.
  • reference numeral 43 is the Thickness of the thermoplastic material of the membrane 24 with a corrugated deformation area marked, the wall thickness 43 (s) in the range between 0.3 and 0.6 mm lies.
  • the bending element designated by reference numeral 28 in the illustration according to FIG. 4 can be simply clipped onto the housing 18 at its clamping points 29. You can do this on the housing 18 as shown in detail X openings 30 and 31 respectively his.
  • the openings 30 and 31 can both in the vertical direction (see Orientation opening 30) and in the horizontal direction (cf. orientation of openings 31 extend in the housing 18).
  • introduced openings can be a bending element 28 in shape simply clip in a bending beam with a round cross-section. This allows both simple assembly and disassembly. Instead of a circular cross section the bending element can also have a different cross section, for example oval or semicircular.
  • 4.1 is a top view of a membrane 24 made of thermoplastic Material with a wavy configured deformation area 38 can be removed.
  • waves extend from the center formed by the pin 32 to the peripheral surface 35, which have valleys and elevations.
  • the bending beam 28 extends over the free surface of the membrane surface 34 inside of the housing 18.
  • the membrane surface 34 of the membrane 24 made of thermoplastic material at fastening points 25 with the housing permanently connected.
  • the length with which the bending element, for example designed as a bending beam 28 spans the membrane surface 34 of the membrane 24 is identified by reference numeral 40.
  • the bending element 28 which is designed, for example, as a bending beam, can be on a contact surface 33 of the pin 32 molded onto the membrane surface 34 in the center apply, so that a deflection and thus a loss of preload when pressurized the membrane surface 34 of the membrane 24 is omitted.
  • FIGS. 5 and 5.1 are a further embodiment variant of a thin-walled membrane made of a thermoplastic material.
  • the membrane can be made of thermoplastic material also be designed in step form as a stepped membrane 27.
  • the stepped membrane 27 can be made of thermoplastic Material manufactured, at clamping points 25 with the inside of the housing 18 of the pressure control / housing ventilation valve. These attachment points too 25 between a stepped membrane 27 made of thermoplastic Material with the housing 18 of the pressure control / housing vent valve can by gluing, ultrasonic welding or by using the friction welding process be generated.
  • membrane 27 in step form contains the Design variant of the membrane 27 in step form a sequence of annular, different levels.
  • This embodiment variant of the membrane 27 made of thermoplastic Material ensures that in the membrane 27 when pressurized tensile stresses avoided by the inflowing gas 21 (see illustration according to FIG. 3) and only bending stresses occur.
  • membrane 27, shown in step form has a wall thickness 43 (s) in Range formed between 0.3 and 0.6 mm.
  • the membrane 27 shown in cross section in FIG. 5 is also in step form for example in the housing 18 of the pressure control / housing ventilation valve clipped bending element 28 acted upon.
  • the bending element 28 is at its assembly points 41 and 42 in openings 30 and 31 (see illustration according to detail X) of the housing 18 clipped in. As already described above, these openings can either be oriented in the vertical direction or in the horizontal direction.
  • membrane element 27 includes one molded on the membrane plateau 39 pin 32, which has a contact surface 33 for the membrane 27 bending element 28 spanning thermoplastic material (cf. illustration 5.1) represents.
  • the execution of the membrane 27 in a step shape advantageously allows the Pin 32, which is essentially in the center of the membrane surface 34 of the membrane 27 in Step shape is molded directly onto the membrane plateau 39. Furthermore, with the Injection molding the thin wall thickness 43 in the range between 0.3 and 0.6 mm without problems produced;
  • the membrane injection molding process offers made of thermoplastic material, be it in corrugated form according to FIG. 4 or in stepped form Form according to Figure 5 the advantage that the control gap 19 end face delimiting To produce foot 26 or the membrane base 37 directly during the production of the component, without the need for post-processing.
  • the membrane surface 34 of the in Membrane 27 made of thermoplastic material is formed by the bending element 28, which is formed in a length 40, spanned.
  • the bending element is at the assembly points 41 and 42 shown in FIG. 5, for example in the housing 18 of the pressure control / housing ventilation valve is clipped in and is only supported on the contact surface 33 of the pin provided in the center of the membrane surface 34 32 from. This causes a deflection of the bending element configured as a bar 28 avoided in the horizontal direction, so that the applied by the bending element 28 Preload can be kept constant.
  • the bending element shown in FIGS. 4, 4.1, 5 and 5.1, shown here as a bending beam 28 is clipped into the housing 18 of the pressure control / housing ventilation valve 15, after that is graded with a wavy deformation area or with a formed deformation area made of thermoplastic material membrane 24 or 27 welded at their connection points 25 to the inside of the housing 18 or has been glued.
  • the pressure control / housing ventilation valve 15 according to the design variants according to Figures 4 and 4.1 or 5 and 5.1 sits at an exposed point on highest point of the cylinder head cover on the internal combustion engine because of this Position the best possible extraction of the crankcase gases of an internal combustion engine, be it a self-igniting or a spark-ignited internal combustion engine, can be carried out.
  • the proposed pressure control / housing ventilation valve also on other units, for example add-on units for oil separation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
EP20020026221 2002-01-18 2002-11-26 Soupape régulatrice de pression pour un systeme de dégasage d'un moteur à combustion interne Expired - Lifetime EP1329598B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10201823 2002-01-18
DE2002101823 DE10201823A1 (de) 2002-01-18 2002-01-18 Druckregelventil zur Kurbelgehäuseentlüftung einer Verbrennungskraftmaschine

Publications (2)

Publication Number Publication Date
EP1329598A1 true EP1329598A1 (fr) 2003-07-23
EP1329598B1 EP1329598B1 (fr) 2006-12-27

Family

ID=7712493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020026221 Expired - Lifetime EP1329598B1 (fr) 2002-01-18 2002-11-26 Soupape régulatrice de pression pour un systeme de dégasage d'un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP1329598B1 (fr)
DE (2) DE10201823A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016005357A1 (de) 2015-06-01 2016-12-01 Mann+Hummel Gmbh Filterelement, Ölabscheider sowie Verfahren zur Regelung des in einem K[urbel]G[ehäuse]E[ntlüftungs]-System herrschenden Drucks

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006019880A1 (de) * 2006-04-28 2007-10-31 Audi Ag Motorgehäusedeckel eines Verbrennungsmotors mit Entlüftungssystem
KR101335763B1 (ko) 2011-11-16 2013-12-02 인지컨트롤스 주식회사 내연기관용 세퍼레이터
DE102020110775A1 (de) 2020-04-21 2021-10-21 Bayerische Motoren Werke Aktiengesellschaft Entlüftungseinrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5090393A (en) * 1990-07-11 1992-02-25 Filterwerk Mann & Hummel Gmbh Pressure regulating valve for installation in a vent duct of an internal combustion engine
WO1998015723A1 (fr) * 1996-10-04 1998-04-16 Filterwerk Mann + Hummel Gmbh Soupape de ventilation du carter
DE19700733A1 (de) * 1997-01-11 1998-07-23 Bosch Gmbh Robert Kurbelgehäuse-Entlüftung mit integrierten Zusatzfunktionen
DE19746763A1 (de) * 1997-10-23 1999-05-06 Walter Schiffer Membrangesteuertes Druckregelventil
FR2826691A1 (fr) * 2001-07-02 2003-01-03 Solvay Circuit de reaspiration des gaz de carter d'un moteur a combustion interne

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5090393A (en) * 1990-07-11 1992-02-25 Filterwerk Mann & Hummel Gmbh Pressure regulating valve for installation in a vent duct of an internal combustion engine
WO1998015723A1 (fr) * 1996-10-04 1998-04-16 Filterwerk Mann + Hummel Gmbh Soupape de ventilation du carter
DE19700733A1 (de) * 1997-01-11 1998-07-23 Bosch Gmbh Robert Kurbelgehäuse-Entlüftung mit integrierten Zusatzfunktionen
DE19746763A1 (de) * 1997-10-23 1999-05-06 Walter Schiffer Membrangesteuertes Druckregelventil
FR2826691A1 (fr) * 2001-07-02 2003-01-03 Solvay Circuit de reaspiration des gaz de carter d'un moteur a combustion interne

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016005357A1 (de) 2015-06-01 2016-12-01 Mann+Hummel Gmbh Filterelement, Ölabscheider sowie Verfahren zur Regelung des in einem K[urbel]G[ehäuse]E[ntlüftungs]-System herrschenden Drucks
EP3100780A1 (fr) 2015-06-01 2016-12-07 Mann + Hummel Gmbh Élement de filtre, separateur d'huile et procede de reglage d'une pression presente dans un systeme d'aeration de carter de vilebrequin
EP3842119A1 (fr) 2015-06-01 2021-06-30 MANN+HUMMEL GmbH Élément filtrant, séparateur d'huile, ainsi que procédé de régulation de la pression dans un système de purge du carter de vilebrequin
EP4241869A1 (fr) 2015-06-01 2023-09-13 MANN+HUMMEL GmbH Élement de filtre, separateur d'huile et procede de reglage d'une pression presente dans un systeme d'aeration de carter de vilebrequin

Also Published As

Publication number Publication date
DE10201823A1 (de) 2003-07-31
EP1329598B1 (fr) 2006-12-27
DE50209072D1 (de) 2007-02-08

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