GB2288452A - Ventilation valve - Google Patents

Ventilation valve Download PDF

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Publication number
GB2288452A
GB2288452A GB9506342A GB9506342A GB2288452A GB 2288452 A GB2288452 A GB 2288452A GB 9506342 A GB9506342 A GB 9506342A GB 9506342 A GB9506342 A GB 9506342A GB 2288452 A GB2288452 A GB 2288452A
Authority
GB
United Kingdom
Prior art keywords
casing
ventilation valve
outlet
plug
pipe
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
GB9506342A
Other versions
GB2288452B (en
GB9506342D0 (en
Inventor
Hans-Peter Drespling
Helmut Scheib
Norbert Staub
Roman Stumberger
Edmund Calliari
Gunter Munkle
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.)
Knecht Filterwerk GmbH
Original Assignee
Knecht Filterwerk 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 Knecht Filterwerk GmbH filed Critical Knecht Filterwerk GmbH
Publication of GB9506342D0 publication Critical patent/GB9506342D0/en
Publication of GB2288452A publication Critical patent/GB2288452A/en
Application granted granted Critical
Publication of GB2288452B publication Critical patent/GB2288452B/en
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
    • F01M13/02—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
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M13/0405—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in covering members apertures, e.g. caps

Landscapes

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

Abstract

A ventilation valve (1) made of plastics material for ventilating a crankcase of a combustion engine has a casing (2), an inlet (3) leading to the crankcase and an outlet (4). Within the casing (2) pipe (10) with an integral valve seating (6) is located with a tight tolerance as a plug-in unit (5). The pipe (10) extends from the outlet (4) to the valve seating (6) and is joined to the outlet (4) in the vicinity of the casing wall. The plug-in unit (5) slidably fits into the casing (2) in one position with a tight tolerance to minimise leaks. A membrane (9) acting as a seal engages on the seating (6) and is held by a lid (8) on the casing (2) with an opening to subject the membrane to atmospheric pressure. A tubular insert (12) may be introduced into the outlet (4) to form a good seal between the outlet (4) and the pipe (10). <IMAGE>

Description

VENTILATION VALVE The present invention relates to a ventilation valve, in particular to a valve of the type used to ventilate crank cases of combustion engines.
Valves of this kind are known in many different forms either made as a separate entity or integral with one or more separating devices used in the separation of oil mist from air.
Thus, for example a combined oil mist and ventilation valve is described in DE 37 01 587. In this device, the separator adopts a two-stage separation process, the first stage comprising the use of a synthetic fleece or metal knitmaterial and the second stage a cyclone.
Within the field of such devices, these ventilation valves or oil mist separators using such ventilation valves, which are otherwise constructed differently, generally have a membrane and a valve seat to regulate the outlet.
The fitting of the valve seat and the connection of the outlet makes the final component particularly expensive and complicated to manufacture.
In DE 39 38 919 a combined crankcase oil separator and ventilation valve made of sheet metal is described. This device has a partition in the outlet in the region of the wall of the casing. The installation of the outlet pipe and valve seat is conducted by inserting the outlet pipe diagonally into the casing and thus pushing it through the outlet opening so that it projects slightly from the casing.
Finally a connection is inserted into the outlet pipe from the outside. The connection, outlet pipe and casing are then soldered together. This process is expensive and elaborate.
It is an object of the present invention to provide an improved ventilation valve that enables the production and assembly costs to be minimised.
In accordance with the invention there is provided a ventilation valve for the crankcase of a combustion engine; said valve having a casing, an inlet means and an outlet means whereby the outlet means is connected in the region of the casing wall to a pipe means extending inside the casing with a valve seat located therein and the valve seat can be closed by a membrane subjected to atmospheric pressure, characterised in that the ventilation valve is made of plastics material the pipe means is an integral plug-in unit which is held inside the casing by a sliding fit through which a connection to the outlet means protruding from the casing is facilitated.
Economical manufacture and assembly is made possible by making the ventilation valve out of plastic and by constructing the outlet pipe with valve seat as a plug-in unit.
Compared with known designs which have a three-part casing the construction of the invention has the advantage that an outer axial separation joint between the air outlet connection and the casing which previously had to be welded or soldered, becomes unnecessary. It is replaced by an inner radial separation joint with a narrow fit, that requires no welding. A further advantage of the plug-in unit is that it can be used without modification in several different casings with e.g., having different external cross-sections.
Further preferred features of the invention are defined in the dependent claims.
The invention is explained in more detail in the following on the basis of one embodiment.
The accompanying drawing, Figure 1, is a cross sectional view of a ventilation valve made in accordance with the invention.
As shown, a ventilation valve 1 has a casing 2 having an inlet means 3 to admit air from a crankcase and an air outlet means 4 providing a connector for a tube (not shown) enabling the purified air to flow to the induction tract of the combustion engine.
Within the casing 2 there is a plug-in unit 5 having an air outlet pipe means 10 leading to the outlet means 4. The pipe means 10 is equipped with a valve seat 6 concentric to the casing 2 and an integrated spring 7. The axial fixing of the plug-in unit 5 can be achieved with a clip-connection. During assembly the plug-in unit 5 is inserted axially into the casing 2 and to seal the air outlet pipe means 10 from the casing 2, a relatively narrow sliding fit is used In addition, the plug-in unit 5 has a guide, not illustrated here, - e.g., a groove-spring in the casing 2 which permits the plug-in unit 5 to be inserted into the casing 2 in only one configuration so as to align the air outlet pipe means 10 with the outlet means 4.
The joint between the air outlet pipe means 10 and the air outlet means 4 can, if necessary, be sealed by a small tube 12 inserted into the air outlet means 4 which bridges the separation joint and projects into the air outlet pipe means 10 by several millimetres.
A membrane 9 is mounted in the casing 2 with the aid of a cover or lid 8 open to the atmosphere. Depending on the pressure conditions in the crankcase the membrane 9 can be lifted away from the valve seat 6 or the spring 7 can lift the membrane 9 from the valve seat 6 to permit the air to flow to the outlet means 4.
A separation medium 11 is accommodated within a cavity beneath the plug-in part 5 so that the lower region of the valve 1 functions as an oil mist separator.

Claims (9)

1. A ventilation valve for the crankcase of a combustion engine; said valve having a casing, an inlet means leading to the interior of the casing and an outlet means whereby the outlet means is connected in the region of the casing wall to a pipe means extending inside the casing with a valve seat located therein and the valve seat can be closed by a membrane subjected to atmospheric pressure, characterised in that the ventilation valve is made of plastics material the pipe means is an integral plug-in unit which is held inside the casing by a sliding fit through which a connection to the outlet means protruding from the casing is facilitated.
2. A ventilation valve according to claim 1, wherein the valve is integrated with an oil separator.
3. A ventilation valve according to claim 1 or 2, wherein the sliding fit ofthe plug-in unit in the casing is one of such tight tolerance that at the junction between the pipe means and the outlet means there are no significant leaks to impair the function of the valve.
4. A ventilation valve according to any one of the preceding claims, wherein a tubular insert is introduced into the outlet means and partly into the pipe means to seal the connection between the outlet means and the pipe means.
5. A ventilation valve according to any one of the preceding claims, wherein the casing has a guide which permits the insertion of the plug-in unit only in a position that enables the pipe means to be aligned with the outlet means.
6. A ventilation valve according to any one of the preceding claims wherein the casing has a lid with an opening to the atmosphere.
7. A ventilation valve according to any one of the preceding claims wherein a separation medium is accommodated within a cavity below the plug-in part.
8. A ventilation valve according to any one of the previous claims wherein a spring is employed to lift the membrane away from the valve seat.
9. A ventilation valve substantially as described with reference to and as illustrated in the accompanying drawing.
GB9506342A 1994-03-28 1995-03-28 Ventilation valve Expired - Lifetime GB2288452B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4410696 1994-03-28

Publications (3)

Publication Number Publication Date
GB9506342D0 GB9506342D0 (en) 1995-05-17
GB2288452A true GB2288452A (en) 1995-10-18
GB2288452B GB2288452B (en) 1997-10-29

Family

ID=6514038

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9506342A Expired - Lifetime GB2288452B (en) 1994-03-28 1995-03-28 Ventilation valve

Country Status (3)

Country Link
DE (1) DE19507202C2 (en)
FR (1) FR2717881B1 (en)
GB (1) GB2288452B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999061761A1 (en) * 1998-05-13 1999-12-02 Scania Cv Aktiebolag (Publ) Arrangement for a supercharged combustion engine with crankcase ventilation
WO2000026567A1 (en) * 1998-10-29 2000-05-11 Wabco Automotive U.K. Limited Vent valve
EP1398468A1 (en) * 2002-09-16 2004-03-17 Peugeot Citroen Automobiles S.A. Pressure relief valve for combustion engine , in particular for motor vehicle
FR2892763A1 (en) * 2005-10-28 2007-05-04 Mark Iv Systemes Moteurs Soc P Gas-oil separator for internal combustion engine of motor vehicle, has cap integrating conduit portion forming exhaust pipe for gas present in separator and membrane regulating exhaust of gas and pressure in separator

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19602194B4 (en) * 1996-01-23 2005-07-28 Deutz Ag crankcase ventilation
DE19618413A1 (en) * 1996-05-08 1997-11-13 Mann & Hummel Filter Oil mist removal element for use in combustion engines
DE19820540C2 (en) * 1998-05-08 2000-06-08 Stihl Maschf Andreas Breather valve for a fuel tank
DE10147230B4 (en) * 2000-09-15 2006-01-05 Alfmeier Präzision AG Baugruppen und Systemlösungen Ventilation device for a crankcase of an internal combustion engine
DE10254626B4 (en) * 2002-11-22 2015-11-12 Volkswagen Ag Crankcase breather valve for an internal combustion engine
DE102004022275A1 (en) * 2004-05-06 2005-12-01 Robert Bosch Gmbh Pressure control valve
FR2906564B1 (en) * 2006-09-28 2012-02-24 Filtrauto DEVICE FOR SEPARATING CERTAIN MATERIALS PRODUCED BY AN INTERNAL COMBUSTION ENGINE
DE102015101181B4 (en) * 2015-01-28 2017-02-23 Thyssenkrupp Ag Controllable oil separator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502452A (en) * 1982-02-17 1985-03-05 Massey-Ferguson-Perkins Limited Valve
GB2191846A (en) * 1986-05-07 1987-12-23 Plas Tech Flow control valve

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138148A (en) * 1961-08-12 1964-06-23 Simca Automobiles Sa Internal combustion engines
DE3701587C1 (en) * 1987-01-21 1987-11-26 Knecht Filterwerke Gmbh Oil mist separator for internal combustion engines, especially for crankcase breathing
DE3914759A1 (en) * 1989-05-05 1990-11-08 Mann & Hummel Filter FILLING OPENING FOR FILLING LUBRICANT OIL INTO AN INTERNAL COMBUSTION ENGINE
DE3938919C1 (en) * 1989-11-24 1990-12-13 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Oil separator for vent gases from engine crankcase - comprises housing contg. rotation-symmetrical filter through which vent gas flows outwards to cleaning space
DE4017074A1 (en) * 1990-05-26 1991-11-28 Mann & Hummel Filter PRESSURE CONTROL VALVE FOR THE CRANKCASE VENTILATION ON AN INTERNAL COMBUSTION ENGINE

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502452A (en) * 1982-02-17 1985-03-05 Massey-Ferguson-Perkins Limited Valve
GB2191846A (en) * 1986-05-07 1987-12-23 Plas Tech Flow control valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999061761A1 (en) * 1998-05-13 1999-12-02 Scania Cv Aktiebolag (Publ) Arrangement for a supercharged combustion engine with crankcase ventilation
WO2000026567A1 (en) * 1998-10-29 2000-05-11 Wabco Automotive U.K. Limited Vent valve
US6516829B1 (en) 1998-10-29 2003-02-11 Wabco Automotive Uk Limited Vent valve
EP1398468A1 (en) * 2002-09-16 2004-03-17 Peugeot Citroen Automobiles S.A. Pressure relief valve for combustion engine , in particular for motor vehicle
FR2844547A1 (en) * 2002-09-16 2004-03-19 Peugeot Citroen Automobiles Sa PRESSURE RELIEF DEVICE FOR AN INTERNAL COMBUSTION ENGINE, PARTICULARLY FOR A MOTOR VEHICLE
FR2892763A1 (en) * 2005-10-28 2007-05-04 Mark Iv Systemes Moteurs Soc P Gas-oil separator for internal combustion engine of motor vehicle, has cap integrating conduit portion forming exhaust pipe for gas present in separator and membrane regulating exhaust of gas and pressure in separator

Also Published As

Publication number Publication date
DE19507202C2 (en) 1998-07-16
FR2717881B1 (en) 1997-04-04
GB2288452B (en) 1997-10-29
GB9506342D0 (en) 1995-05-17
DE19507202A1 (en) 1995-10-05
FR2717881A1 (en) 1995-09-29

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Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20150327