US20120272930A1 - Valve for limiting the pressure in a crankcase - Google Patents

Valve for limiting the pressure in a crankcase Download PDF

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Publication number
US20120272930A1
US20120272930A1 US13/442,987 US201213442987A US2012272930A1 US 20120272930 A1 US20120272930 A1 US 20120272930A1 US 201213442987 A US201213442987 A US 201213442987A US 2012272930 A1 US2012272930 A1 US 2012272930A1
Authority
US
United States
Prior art keywords
rolling diaphragm
line
flow duct
valve
crankcase
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.)
Abandoned
Application number
US13/442,987
Other languages
English (en)
Inventor
Joerg Bittner
Torsten Gerlich
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.)
Carl Freudenberg KG
Eagle Actuator Components GmbH and Co KG
Original Assignee
Carl Freudenberg KG
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 Carl Freudenberg KG filed Critical Carl Freudenberg KG
Assigned to CARL FREUDENBERG KG reassignment CARL FREUDENBERG KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BITTNER, JOERG, GERLICH, TORSTEN
Assigned to EAGLE ACTUATOR COMPONENTS GMBH & CO. KG reassignment EAGLE ACTUATOR COMPONENTS GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CARL FREUDENBERG KG
Publication of US20120272930A1 publication Critical patent/US20120272930A1/en
Abandoned 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
    • F01M13/0011—Breather valves
    • F01M2013/0016—Breather valves with a membrane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7879—Resilient material valve

Definitions

  • the invention relates to a valve for limiting the pressure in a crankcase of a motor vehicle, comprising a first line and a second line, which can be fluidically connected by a movable body, wherein the body is connected to a rolling diaphragm and, together with the rolling diaphragm, can expose or close a flow duct.
  • Valves of the type mentioned above are already known from the state of the art.
  • a valve which is used to vent the crankcase is known from DE 20 2005 012 403 U1.
  • This valve comprises a rolling diaphragm, which exposes some sections of concentrically arranged flow ducts. A flow duct is exposed whenever a pressure differential develops which is sufficient to lift the rolling diaphragm.
  • valves in which a movable body lifts off a sealing seat so as to expose a flow duct are known from the prior art.
  • the movable body is lifted whenever a pressure differential develops that is below a spring force.
  • These valves are generally open in the depressurized state.
  • valves known from the prior art are at times that they tend to make rattling noise. This noise occurs when the movable body briefly lifts off the sealing seat and then rests thereon again. This effect corresponds to chattering of the movable body, which due to the fluctuating pressure differentials continually strikes against, and then lifts off, the sealing seat.
  • the present invention relates to a valve for limiting the pressure in a crankcase of a motor vehicle, comprising a first line and a second line, which can be fluidically connected by a movable body, the body being connected to a rolling diaphragm and, together with the rolling diaphragm, being able to expose or close a flow duct, wherein the rolling diaphragm rolls on a separating element, which is positioned in the flow duct between the first line and second line at least in some regions.
  • a valve of the type mentioned above is thus characterized in that the rolling diaphragm rolls on a separating element, which is positioned in the flow duct between the first line and second line at least in some regions.
  • a rolling diaphragm which rolls on a separating element, can expose a flow duct in a particularly low-noise manner. It was further recognized that a rolling diaphragm can be produced from an elastomer, whereby the rolling diaphragm can conform to, and detach from, the separating element in a noiseless manner. Rattling noise is thus effectively prevented. It has moreover been recognized that the combination of a separating element with a rolling diaphragm surprisingly assures a compact construction of the valve, because the rolling diaphragm and the movable body can be configured as one piece. Consequently, the object mentioned above has been achieved.
  • the separating element could comprise passages. This specific embodiment assures that a fluid can flow from the first line to the second line, more specifically when the rolling diaphragm exposes the passages at least in some regions. The fluid can thus pass through the passages and effect depressurization in the crankcase. To this end, passages that are circular, spiral-shaped or configured in a different manner are conceivable.
  • the separating element could be provided the elongated slots, at least some of which extend parallel to the direction of movement of the movable body. This assures that the flow cross-sectional surface area of the flow duct can be continuously and steadily enlarged when the rolling diaphragm rolls on the separating element, following the movable body.
  • a woven fabric could be incorporated in the rolling diaphragm.
  • the woven fabric could be a metal mesh or metal woven fabric. This specific embodiment reinforces the rolling diaphragm, allowing it to withstand even high pressure differentials. It is also conceivable for the woven fabric to be a plastic woven fabric or plastic knitted fabric, preferably made of nylon. Plastic material advantageously lowers the weight of the rolling diaphragm, while increasing the flexibility and deformability thereof.
  • the movable body could be held in a position that exposes the flow duct at least partially by a spring.
  • This specific embodiment creates a valve in which the fluid connection between the first line and second line is interrupted when a pressure differential between atmospheric pressure and pressure in the first line exceeds the spring force.
  • the first line could be connected to the crankcase of a motor vehicle, in which an undesirably high sub-atmospheric pressure develops.
  • the rolling diaphragm and the movable body could be configured as one piece, wherein the rolling diaphragm has a preferably stiffened region for supporting the spring. This allows a construction of the valve that has a particularly small number of parts.
  • the rolling diaphragm could exhibit residual stress, which forces the rolling diaphragm back into a basic position or basic shape after a deflection or deformation out of this basic position or basic shape.
  • a spring can thus be eliminated, because the valve is held open by the residual stress of the rolling diaphragm.
  • the movable body is held remote from the flow duct by the rolling diaphragm, when the diaphragm is in the basic position or basic shape, such that the flow duct is open. As soon as the rolling diaphragm is deformed out of the basic position or basic shape as a result of developing pressure differentials, the movable body moves such that the flow duct is closed.
  • the movable body As soon as the pressure differentials are reduced, or a drop below certain values has occurred, the movable body is forced back into a position that exposes the flow duct as a result of the residual stress of the rolling diaphragm. The rolling diaphragm then return to the basic shape or basic position thereof, which it has in the non-deformed state.
  • FIG. 1 shows a valve for limiting the pressure in the crankcase of a motor vehicle, comprising a rolling diaphragm, which rolls on a separating element.
  • FIG. 1 shows a valve for limiting the pressure in a crankcase of a motor vehicle, comprising a first line 5 and a second line 6 , which can be fluidically connected by a movable body 4 , wherein the body 4 is connected to a rolling diaphragm 3 and, together with the rolling diaphragm 3 , can expose or close a flow duct 9 .
  • the first line 5 is associated with a crankcase, which is not shown here and in which undesirably high negative pressure p 2 can develop.
  • Such negative pressure p 2 can develop when air is taken in via the second line 6 .
  • the second line 6 is connected to an intake tract of a motor vehicle, the intake tract not being shown and subject to a pressure pl.
  • the force of the pressure p 1 acts perpendicularly to the rolling diaphragm 3 , whereby this rolling diaphragm can peel off the separating element 1 with minimal material stress.
  • the rolling diaphragm 3 rolls on a separating element 1 , which is positioned in the flow duct 9 between the first line 5 and second line 6 at least in some regions.
  • the flow duct 9 is thus exposed or closed.
  • the separating element 1 comprises passages 2 .
  • the passages 2 in the separating element 1 are designed as elongated slots 2 , at least some of which extend parallel to the direction of movement of the body 4 .
  • a woven fabric is incorporated in the rolling diaphragm 3 .
  • the first body 4 is held in a position that exposes the flow duct 9 at least partially by a spring 7 .
  • the movable body 4 is moved downward in the FIGURE.
  • the rolling diaphragm 3 thus rolls on the separating element 1 and gradually and continuously closes the elongated slots 2 . This rolling process prevents excessive suction from developing through the second line 6 , which further favors the development of negative pressure p 2 in the crankcase. Fluid can no longer be suctioned out of the crankcase through the first line 5 to the second line 6 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Reciprocating Pumps (AREA)
  • Check Valves (AREA)
US13/442,987 2011-04-28 2012-04-10 Valve for limiting the pressure in a crankcase Abandoned US20120272930A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011018980.7 2011-04-28
DE201110018980 DE102011018980A1 (de) 2011-04-28 2011-04-28 Ventil zur Begrenzung des Drucks im Kurbelwellengehäuse

Publications (1)

Publication Number Publication Date
US20120272930A1 true US20120272930A1 (en) 2012-11-01

Family

ID=47007694

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/442,987 Abandoned US20120272930A1 (en) 2011-04-28 2012-04-10 Valve for limiting the pressure in a crankcase

Country Status (3)

Country Link
US (1) US20120272930A1 (de)
DE (1) DE102011018980A1 (de)
FR (1) FR2974594A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10221736B2 (en) * 2015-06-01 2019-03-05 Mann+Hummel Gmbh Filter element, oil separator, and method for controlling prevailing pressure in crankcase ventilation system
US20210164569A1 (en) * 2015-06-01 2021-06-03 Mann+Hummel Gmbh Sealing Element, Annular Filter Element, Oil Separator, and Method for Controlling Prevailing Pressure in Crankcase Ventilation System

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646077A (en) * 1950-02-15 1953-07-21 Stator Company Multilayer diaphragm
US2649273A (en) * 1946-06-13 1953-08-18 Pierre P Honegger Device for controlling the passage of a fluid
US3606911A (en) * 1969-11-14 1971-09-21 Masoneilan Int Inc Invertible valve trim for control valves
US4141379A (en) * 1977-05-16 1979-02-27 Cutter Laboratories, Inc. Check valve
US4390036A (en) * 1981-04-06 1983-06-28 Bellofram Corporation Rolling diaphragm vacuum control
US4488702A (en) * 1983-09-29 1984-12-18 Lapeyre James M Rolling diaphragm metering valve
USRE32553E (en) * 1978-11-29 1987-12-08 Exhalation valve assembly
US4712580A (en) * 1986-03-21 1987-12-15 Intertech Resources Inc. Exhalation valve assembly
US20050211944A1 (en) * 2004-03-29 2005-09-29 Tutt Brian J Packless valve apparatus
US20080142091A1 (en) * 2004-03-12 2008-06-19 Uwe Meinig Pneumatic Pressure Regulation Valve
US7766028B2 (en) * 1999-07-09 2010-08-03 I-Flow Corporation Pressure regulator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005012403U1 (de) 2005-08-06 2006-12-21 Hengst Gmbh & Co.Kg Pneumatisches Druckregelventil

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649273A (en) * 1946-06-13 1953-08-18 Pierre P Honegger Device for controlling the passage of a fluid
US2646077A (en) * 1950-02-15 1953-07-21 Stator Company Multilayer diaphragm
US3606911A (en) * 1969-11-14 1971-09-21 Masoneilan Int Inc Invertible valve trim for control valves
US4141379A (en) * 1977-05-16 1979-02-27 Cutter Laboratories, Inc. Check valve
USRE32553E (en) * 1978-11-29 1987-12-08 Exhalation valve assembly
US4390036A (en) * 1981-04-06 1983-06-28 Bellofram Corporation Rolling diaphragm vacuum control
US4488702A (en) * 1983-09-29 1984-12-18 Lapeyre James M Rolling diaphragm metering valve
US4712580A (en) * 1986-03-21 1987-12-15 Intertech Resources Inc. Exhalation valve assembly
US7766028B2 (en) * 1999-07-09 2010-08-03 I-Flow Corporation Pressure regulator
US20080142091A1 (en) * 2004-03-12 2008-06-19 Uwe Meinig Pneumatic Pressure Regulation Valve
US20050211944A1 (en) * 2004-03-29 2005-09-29 Tutt Brian J Packless valve apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10221736B2 (en) * 2015-06-01 2019-03-05 Mann+Hummel Gmbh Filter element, oil separator, and method for controlling prevailing pressure in crankcase ventilation system
US20210164569A1 (en) * 2015-06-01 2021-06-03 Mann+Hummel Gmbh Sealing Element, Annular Filter Element, Oil Separator, and Method for Controlling Prevailing Pressure in Crankcase Ventilation System
US11892078B2 (en) * 2015-06-01 2024-02-06 Mann+Hummel Gmbh Sealing element, annular filter element, oil separator, and method for controlling prevailing pressure in crankcase ventilation system

Also Published As

Publication number Publication date
FR2974594A1 (fr) 2012-11-02
DE102011018980A1 (de) 2012-10-31

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CARL FREUDENBERG KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BITTNER, JOERG;GERLICH, TORSTEN;REEL/FRAME:028018/0190

Effective date: 20120404

AS Assignment

Owner name: EAGLE ACTUATOR COMPONENTS GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CARL FREUDENBERG KG;REEL/FRAME:028141/0341

Effective date: 20120404

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION