US3766898A - Crankcase ventilation valve - Google Patents

Crankcase ventilation valve Download PDF

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Publication number
US3766898A
US3766898A US3766898DA US3766898A US 3766898 A US3766898 A US 3766898A US 3766898D A US3766898D A US 3766898DA US 3766898 A US3766898 A US 3766898A
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United States
Prior art keywords
valve
plunger
orifice
head
flow
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Expired - Lifetime
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Mullen W Mc
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Motors Liquidation Co
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Motors Liquidation Co
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Application filed by Motors Liquidation Co filed Critical Motors Liquidation Co
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Publication of US3766898A publication Critical patent/US3766898A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00Crankcase ventilating or breathing
    • F01M13/02Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • F01M13/023Control valves in suction conduit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00Casings, e.g. crankcases or frames
    • F02F7/006Camshaft or pushrod housings
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7722Line condition change responsive valves
    • Y10T137/7748Combustion engine induction type
    • Y10T137/7749Valve in auxiliary inlet to induction line

Abstract

A crankcase ventilation valve for an internal combustion engine has an undercut portion of the plunger body which acts as a deposit storage area for adherent deposits scraped from the flow control portion of the plunger body through its reciprocating movement in the flow control orifice. The undercut portion is located on the plunger body so that the closest end thereof enters but does not pass through the flow control orifice when the plunger is in its extreme position against its stop. In this way positive scraping of deposits into the storage area is assured without substantial effect on the valve flow curve being caused by the presence of the undercut storage area.

Description

Lowther 123 1191;
1 1 Umted States Patent 1191 1111 McMullen 1 1 11 Oct. 23, 1973 CRANKCASE VENTILATION VALVE [75] Inventor: Wesley W. McMullen, Flint, Mich. Pmfmry Exam"1er Al FawremFe sm'th 1 Assistant Exammer-Mwhael Koczo, Jr. [73] Assignee: General Motors Corporation, A r -J, L, Carpenter et a]. Detroit, Mich.
V [22] Filed: Oct. 21, 1971 57 ABSTRACT [21] PP 191,524 A crankcase ventilation valve for an'internal combustion engine has an undercut portion of the plunger 52 u.s. c1. 123/119 B, 137/480 body which acts as a deposit Storage r for adherent [51] Int. Cl. F02d 9/00 deposits scraped from the flow Control Portion of the [58] Field of Search 123/119 B; 137/480 P n body/through its reciprocating movement in theflow control orifice. The undercut portion is lo- 5 References Cited cated on the plunger body so that the closest end UNITED STATES PATENTS thereof enters but does not pass through the flow control orifice when the plunger is in its extreme position 3,165,097 1/1965 Lowther 123/119 B against its Stop- In i y positive p g of p 3,263,699 8/1966 Glvler et al. 123/119 B X 3 709 204 [1973 No one 123/1119 B 1ts 1nto the storage area 1s assured w1thout substantlal 3'645242 2/1972 Hofiuchi." 137/48OiX effect on the valve flow curve being caused by the 3,359,960 12/1967 Pittsley.... "123/1198 Presence of the undercut Storage 3,354,898 11 1967 B 123 119 B UX arnes 3 Clalms, 4 Drawmg Figures CRANKCASE VENTILATION VALVE BACKGROUND OF THE INVENTION This invention relates to crankcase ventilation flow control valves for internal combustion engines and, more particularly, to a crankcase ventilation valve for controlling the flow of vapors into the induction system from the crankcase or other comparable portion of the housing of an internal combustion engine.
It is old in the art to provide'an internal combustion engine with a so-calledcrankcase ventilation system, which includes means for recirculating blow-by gases and other vapors from the crankcase 'or comparable portion of an internal combustion engine to its induction system. Commonly, such systems are now closed by providing means for drawing fresh air into the crankcase from the engine air cleaner or other portion of the induction system ahead of the carburetor so as to substantially prevent the escape" of crankcase vapors, blow-by gases and the like to the exterior of the engine under all operating conditions.
The majority of crankcase ventilation systems currently in use in automotive vehicles include the provision of a flow control valve, called a crankcase ventilationvalve or PCV valve, in the conduit between the engine crankcase and the engineinlet manifold or connecting portion of the induction system to control the rate of flow of blowby gases and other vapors into the engine induction system.
One type of valve which has been extensively used in commercial vehicles in the disclosed or a modified form is shown in U.S. Pat. No. 3,359,960 Pittsley, which was granted Dec. 26, 1967 to the assignee of the present invention. As indicated in the Pittsley patent, valves of the typedisclosed therein include stop means which are engageable by the head of the plunger so as to prevent a portion of the plunger adjacent the head from entering the flow control orifice. This portion of the plunger then acts as .a dirt storage area and retains out of the flow stream some of the deposits which are scraped from the plunger flow control surface.
While the operation of such valves has been highly satisfactory, it hasbeen found that under engine operating conditions which cause an excessive rate of de posit formation 'on the crankcase ventilation valve plunger, the build-up of depositsin the dirt storage area may become excessive so that it changes the flow characteristics of the valve, primarily by reducingthe flow capacity at or near the engine idle position of the plunger. This flow reduction, if excessive, may affect engine operation by requiring'adjustments to the carburetor settings, as well as interfere with proper ventilation of the engine crankcase. As a result, replacement of the crankcase ventilation valve may be required.
SUMMARY OF THE INVENTION the plunger is against its stop, is' located within the flow control orifice. This point is arranged to enter but not pass through the orifice. By this construction, deposits are scraped in positive fashion from the flow control portion of the plunger body into the undercut deposit storage portion but this portion is prevented from having any significant effect upon the flow characteristics of the valve.
These and other features of the invention will be more apparent from the following description and drawing which disclose one embodiment of flow control valve formed according to the invention.
BRIEF DESCRIPTION OF THE DRAWING In the drawing:
FIG. 1 is a front elevational view of an engine having a crankcase ventilation system including a flow control DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawing in detail, FIG. 1 illustrates an internal combustion engine generally indicated by numeral 10 and having a plurality of cylinders 12 arranged in a pair of banks angularly displaced with respect to one another. Cylinders: 12 are open at their lower portions to the engine crankcase 14 which is defined by the exterior walls of the engine and by an oil pan 16. Within cylinders. 12 are pistons 20 arranged for reciprocation therein and connected by connecting rods 22 with the respective throws of crankshaft 24.
The engine includes cylinder heads 26 closing the tops of the cylinders in conventional manner and forming in cooperation with the pistons combustion chambers 28. An induction system is providedfor introducing a combustible mixture into the combustion chamhers and includes inlet ports 30 formed in the cylinder heads, an 'inlet manifold 32 connecting with the inlet ports, a carburetor 34 mounted on the inlet manifold and an inlet air cleaner 36 carried by the carburetor.
Engine 10 further includes a crankcase ventilation systemhaving an inlet conduit 38 which connects the engine air cleaner 36 with the interior of one of the en-- gine rocker covers 40. The interior of rocker cover 40.
communicates through passages, not shown, with the engine crankcase 14 which, in turn, communicates through additional internal passages with the other engine rocker cover 42.-A crankcase ventilation flow control valve 44 is mounted in rocker cover 42 and connects through an outlet conduit 46 with the inlet manifold 32 of the engine. FIGS. 2 4 disclose in detail the construction of the crankcase ventilation flow control valve 44 of FIG. 1. Valve 44 is shown to include a multi -piece housing 48 which is made up of a tubular body member 50 formed of sheet metal and secured by crimping at 52 to a formed outlet member 54. Member 54 includes an integral outlet fitting 56 over which conduit 46 is resiliently retained. The member 54 also retains, in an enlarge'd portion adjacent fitting 56, an annular insert 58 which includes a flow control orifice 60 anda longitudinally extending annular stop portion 62. A backfire washer 64 is received in the end of member 50 opposite from the insert 58 and includes a central opening 66. The portion of housing 48 adjacent the backfire washer 64 is received within a rubber grommet 68 secured within the rocker cover 42 so as to provide for receiving crankcase vapors, including engine blowby gases, from the interior of the engine crankcase to pass through the opening 66 and orifice 60 of the valve housing and into the engine induction system.
Within housing 48 there is reciprocably located a valve element or plunger 70. Plunger 70 includes an elongated bodyportion 72 connecting with an enlarged head portion 74 which extends radially beyond the body portion into rubbing contact with the walls of the housing 48. The head portion is provided with a plurality of cutouts 76 to' permit a flow of crankcase vapors past the head at all times except when the head is seated against the backfire washer 64 in which condi-' tion it closes the opening 66. The plunger body is made up of a generallytapereld fiow control portion 78 which extends to the end of the plunger opposite from head 74 and a deep square-edged undercut deposit storage portion 80 extending between the head 74 and the flow control portion 78. Flow control portion 78 tapers generally from its smaller end to its larger end and is free to rub against the orifice 60 during movement therein. The smaller end of portion 78 is positioned within orifree 60 when the'head portion 74 is against the backfire washer 64 and the larger end is positioned within orifice 60 when the head portion 74 is against the stop 62. A coil spring 84 is provided which extends between the insert member 58 and the underside of head portion 74 and acts to bias the plunger 70 downwardly, as shown in the drawing, in a direction to permit increased flow through the orifice 60'. g
In operation, the vacuum created in the engine inlet manifold 32 causes a reduction in pressure in the conduit 46 and outlet fitting 56 downstream of the orifice 60. This creates a flow of crankcase vapors through the valve 44, the amount of which is controlled by the position of the valve plunger 70. When the difference in pressure across the plunger is high, as when the engine is idling and inlet manifold vacuum is high, plunger 70 is urged upwardly against the force of spring 84 to a position at or near that shown in FIG. 3 of the drawing.
' In most instances the valve will be sized so that the plunger head 74 is close to but not against the stop 62 when the engine is idling but will contact the stop as shown in FIG. 3 during the highervacuurn conditions which exist during engine deceleration. In the position shown in FIG. 3, the maximum diameter of the plunger control portion 72 is within the orifice 60 so that a maximum restriction to flow exists and the passage of crankcase vapors is limited accordingly.
It should be noted that the undercut deposit storage portion 80 is arranged so that one end thereof also extends within the orifice 60 when the plunger head is against stop 62. In this way, deposits, which may collect upon the control surfaces of portion 72 from the crankcase vapors which flow over its surface, will be scraped off by rubbing action of portion 72 against the inner diameter of orifice 60 and deposited within the storage portion 80. In this way, adherent deposits are moved inwardly to the smaller diameter portion of the plunger so that they do not block the flow of crankcase vapors when the plunger is at or near the idle position. In addition, the fact that the deposit storage area is made so as not to extend completely through the orifice at any time prevents this portion from having any significant effect upon the rate of flow through the orifice which is instead controlled by the adjacent larger diameter end of the flow control portion 72.
The term crankcase ventilation valve is used herein as it is a common identifying term for such valves and is not intended to indicate any limitation on their use which, it should be understood, may include application in engines which have no crankcase or in other engine systems.
While the-invention has been described by reference to a preferred embodiment, it should be apparent that various changes could be made within the scope of the inventive concepts taught and, accordingly, the invention is intended to be limited only by the language of the following claims.
I claim:
1. A flow control valve for use with an internal combustion engine to control the flow of blow-by gases or the like to the engine induction system, said valve comprising a housing defining a fluid flow path and having a flow control orifice in said flow, path,
a valve plunger within said housing, said plunger having an elongated body including a flow control portion of variable cross sectional area longitudinally thereof, which is reciprocably movable within said orifice in response to pressure differentials across the valve plunger to control fluid flow through the orifice, and
stop means in the housing and engagable by the valve plunger only at one predetermined position thereof to stop movement of the valve plunger in one direction at said predetermined position within said orifice,
said valve plunger body having an undercut portion adjacent the flow control portion, said undercut portion being positioned so that one end thereof extends into but does not pass through the orifice when said valve plunger is against said stop means, whereby said undercut portion forms a storage volume for adherent deposits scraped from the surface of the plunger body flow control portion during its movement within the orifice.
2. A crankcase ventilation valve for use with an internal combustion engine to control the flow of blow-by beyond said predetermined position in one direction,
said deposit collection portion being formed by a substantial undercut of the elongated portion, said deposit collection portionextending from adjacent the head to a point, on the body portion which enters but does not pass through the orifice when the head moves into engagement with the stop means.
3. A crankcase ventilation valve for use with an internal combustion engine to control the flow of blow-by gases and vapors into the engine induction system, said valve comprising a housing having a fluid flow control orifice therein, a valve plunger reciprocably carried in said housing and having an elongated body portion and a head at one end thereof, said body portion including a sharp-edged undercut forming a deposit collection portion adjacent the head and a generally tapered flow control portion having a larger diameter, endthe end of said larger diameter portion adjacent said undercut is within said orifice to provide a maximum flow restriction, and
spring means in said housing and biasing said plunger in a flow increasing direction away from said stop means.

Claims (3)

1. A flow control valve for use with an internal combustion engine to control the flow of blow-by gases or the like to the engine induction system, said valve comprising a housing defining a fluid flow path and having a flow control orifice in said flow path, a valve plunger within said housing, said plunger having an elongated body including a flow control portion of variable cross sectional area longitudinally thereof, which is reciprocably movable within said orifice in response to pressure differentials across the valve plunger to control fluid flow through the orifice, and stop means in the housing and engagable by the valve plunger only at one predetermined position thereof to stop movement of the valve plunger in one direction at said predetermined position within said orifice, said valve plunger body having an undercut portion adjacent the flow control portion, said undercut portion being positioned so that one end thereof extends into but does not pass through the orifice when said valve plunger is against said stop means, whereby said undercut portion forms a storage volume for adherent deposits scraped from the surface of the plunger body flow control portion during its movement within the orifice.
2. A crankcase ventilation valve for use with an internal combustion engine to control the flow of blow-by gases and vapors into the engine induction system, said valve comprising a housing having an orifice therein to restrict fluid flow therethrough, a valve element in said housing and having an elongated body portion and a head at one end thereof, said body portion including a deposit collection portion adjacent the head and a generally tapering flow control portion on the end opposite the head, and stop means in the housing and engagable by the head only at one predetermined position of the valve element to prevent movement of the valve element beyond said predetermined position in one direction, said deposit collection portion being formed by a substantial undercut of the elongated portion, said deposit collection portion extending from adjacent the head to a point on the body portion which enters but does not pass through the orifice when the head moves into engagement with the stop means.
3. A crankcase ventilation valve for use with an internal combustion engine to control the flow of blow-by gases and vapors into the engine induction system, said valve comprising a housing having a fluid flow control orifice therein, a valve plunger reciprocably carried in said housing and having an elongated body portion and a head at one end thereof, said body portion including a sharp-edged undercut forming a deposit collection portion adjacent the head and a generally tapered flow control portion having a larger diameter, ending immediately adjacent the deposit collection portion, and a smaller diameter at its end opposite from the head, said flow control portion being free to rub the edges of said orifice during reciprocation therein, stop means in the housing and engagable by the head in only one predetermined position of the plunger to prevent movement of the plunger in one direction beyond said predetermined position wherein the end of said larger diameter portion adjacent said undercut is within said orifice to provide a maximum flow restriction, and spring means in sAid housing and biasing said plunger in a flow increasing direction away from said stop means.
US3766898D 1971-10-21 1971-10-21 Crankcase ventilation valve Expired - Lifetime US3766898A (en)

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Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4341090A (en) * 1981-01-26 1982-07-27 Lennox Industries, Inc. Variable orifice metering
US4373499A (en) * 1980-08-27 1983-02-15 Filterwerk Mann & Hummel Gmbh Ventilation check valve for internal combustion engines
US4602607A (en) * 1985-02-25 1986-07-29 General Motors Corporation Internal crankcase ventilation system with easily accessible PCV valve
US4625703A (en) * 1985-04-08 1986-12-02 Robertshaw Controls Company Crankcase ventilating system, flow control device therefor and method of making the same
US4667647A (en) * 1984-03-15 1987-05-26 Honda Giken Kogyo Kabushiki Kaisha Crankcase ventilating system and method of removing oil mist from gas in the system
US5205243A (en) * 1992-03-26 1993-04-27 Tecumseh Products Company Crankcase breather having a fitted retainer for retaining a valved cup assembly
US5347973A (en) * 1993-06-25 1994-09-20 Walker Design Inc. Vacuum relief valve
US5697351A (en) * 1996-11-12 1997-12-16 Miniature Precision Components, Inc. Positive crankcase ventilation valve for motor vehicle
DE19701977A1 (en) * 1997-01-22 1998-07-23 Mann & Hummel Filter Internal combustion engine with a valve chamber cover
US20030213479A1 (en) * 2001-08-30 2003-11-20 Tim Wade PCV valve guide
WO2004036000A1 (en) * 2002-10-15 2004-04-29 Cooper Technology Services, Llc. Pcv valve adapter
US20050188968A1 (en) * 2004-02-02 2005-09-01 Duprez Wayne R. Temperature-controlled PCV valve
US20060180132A1 (en) * 2005-02-01 2006-08-17 Standard-Thomson Corporation Temperature-controlled pcv valve
US20060236989A1 (en) * 2005-04-22 2006-10-26 Callahan Douglas J Heated pcv system
US20070028904A1 (en) * 2005-08-04 2007-02-08 Standard-Thomson Corporation Temperature-controlled pcv valve
US20080099000A1 (en) * 2006-10-30 2008-05-01 Aisan Kogyo Kabushiki Kaisha PCV valve
US20080257321A1 (en) * 2007-04-18 2008-10-23 Artur Knaus Valve and Cylinder Head Cover for Crankcase Ventilation of an Internal Combustion Engine
US20090229584A1 (en) * 2008-03-14 2009-09-17 Aisan Kogyo Kabushiki Kaisha Heating apparatus of electromagnetic PCV valve
US20100139634A1 (en) * 2005-03-24 2010-06-10 Tim Wade Positive crankcase ventilation valve assembly with a vacuum pulsation dampener
US20120006306A1 (en) * 2010-07-06 2012-01-12 Dichtungstechnik G. Bruss Gmbh & Co. Kg Housing for an Internal Combustion Engine with a PCV Valve for Crankcase Ventilation, and a Method for Attaching a PCV Valve to a Housing
US20120138031A1 (en) * 2010-12-01 2012-06-07 Kia Motors Corporation Pcv valve
US20130087222A1 (en) * 2011-10-07 2013-04-11 Aisan Kogyo Kabushiki Kaisha Flow control valves
US20140069399A1 (en) * 2012-09-07 2014-03-13 Duane M. Eckard Turbo PCV Valve
USD727970S1 (en) 2013-07-31 2015-04-28 Standard Motor Products, Inc. Combined positive crankcase ventilation valve and dynamic camshaft seal
US9976457B2 (en) 2012-09-07 2018-05-22 Miniature Precision Components, Inc. Turbo PCV valve
US20200040919A1 (en) * 2018-07-31 2020-02-06 Emerson Process Management Regulator Technologies, Inc. Vent Limiting Device for Use with Fluid Regulators
US10934906B2 (en) * 2018-09-27 2021-03-02 Toyota Jidosha Kabushiki Kaisha Blow-by gas treating device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19525542A1 (en) * 1995-07-13 1997-01-16 Mann & Hummel Filter Heating device
DE102014107230B4 (en) 2014-05-22 2015-12-31 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Pressure relief valve

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US3105477A (en) * 1962-01-08 1963-10-01 Novo Ind Corp Crankcase valve ventilating system
US3165097A (en) * 1963-02-13 1965-01-12 Novo Ind Corp Crankcase ventilating system
US3263699A (en) * 1963-11-26 1966-08-02 Standard Screw Crankcase ventilation control means
US3354898A (en) * 1966-05-02 1967-11-28 Standard Screw Crankcase ventilating valve having rotatable metering plunger
US3359960A (en) * 1964-12-21 1967-12-26 Gen Motors Corp Crankcase ventilation
US3645242A (en) * 1971-03-31 1972-02-29 Nissan Motor Crankcase ventilation valve
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US3105477A (en) * 1962-01-08 1963-10-01 Novo Ind Corp Crankcase valve ventilating system
US3165097A (en) * 1963-02-13 1965-01-12 Novo Ind Corp Crankcase ventilating system
US3263699A (en) * 1963-11-26 1966-08-02 Standard Screw Crankcase ventilation control means
US3359960A (en) * 1964-12-21 1967-12-26 Gen Motors Corp Crankcase ventilation
US3354898A (en) * 1966-05-02 1967-11-28 Standard Screw Crankcase ventilating valve having rotatable metering plunger
US3645242A (en) * 1971-03-31 1972-02-29 Nissan Motor Crankcase ventilation valve
US3709204A (en) * 1971-04-09 1973-01-09 Gen Motors Corp Crankcase ventilation

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373499A (en) * 1980-08-27 1983-02-15 Filterwerk Mann & Hummel Gmbh Ventilation check valve for internal combustion engines
US4341090A (en) * 1981-01-26 1982-07-27 Lennox Industries, Inc. Variable orifice metering
US4667647A (en) * 1984-03-15 1987-05-26 Honda Giken Kogyo Kabushiki Kaisha Crankcase ventilating system and method of removing oil mist from gas in the system
US4602607A (en) * 1985-02-25 1986-07-29 General Motors Corporation Internal crankcase ventilation system with easily accessible PCV valve
US4625703A (en) * 1985-04-08 1986-12-02 Robertshaw Controls Company Crankcase ventilating system, flow control device therefor and method of making the same
EP0563565A1 (en) * 1992-03-26 1993-10-06 Tecumseh Products Company Crankcase breather having a fitted retainer for retaining a valved cup assembly
US5205243A (en) * 1992-03-26 1993-04-27 Tecumseh Products Company Crankcase breather having a fitted retainer for retaining a valved cup assembly
US5347973A (en) * 1993-06-25 1994-09-20 Walker Design Inc. Vacuum relief valve
US5697351A (en) * 1996-11-12 1997-12-16 Miniature Precision Components, Inc. Positive crankcase ventilation valve for motor vehicle
WO1998021467A2 (en) * 1996-11-12 1998-05-22 Miniature Precision Components, Inc. Positive crankcase ventilation valve for motor vehicle
WO1998021467A3 (en) * 1996-11-12 1998-10-01 Miniature Precision Components Positive crankcase ventilation valve for motor vehicle
DE19701977B4 (en) * 1997-01-22 2006-11-23 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Internal combustion engine with a valve chamber cover
DE19701977A1 (en) * 1997-01-22 1998-07-23 Mann & Hummel Filter Internal combustion engine with a valve chamber cover
US8356587B2 (en) * 2001-08-30 2013-01-22 Cooper-Standard Automotive Inc. PCV valve guide
US20030213479A1 (en) * 2001-08-30 2003-11-20 Tim Wade PCV valve guide
WO2004036000A1 (en) * 2002-10-15 2004-04-29 Cooper Technology Services, Llc. Pcv valve adapter
US20050188968A1 (en) * 2004-02-02 2005-09-01 Duprez Wayne R. Temperature-controlled PCV valve
US7017564B2 (en) * 2004-02-02 2006-03-28 Standard-Thomson Corporation Temperature-controlled PCV valve
US20060180132A1 (en) * 2005-02-01 2006-08-17 Standard-Thomson Corporation Temperature-controlled pcv valve
US7316227B2 (en) 2005-02-01 2008-01-08 Standard-Thomson Corporation Temperature-controlled PCV valve
US20100139634A1 (en) * 2005-03-24 2010-06-10 Tim Wade Positive crankcase ventilation valve assembly with a vacuum pulsation dampener
US7316226B2 (en) 2005-04-22 2008-01-08 Miniature Precision Components, Inc. Heated PCV system
US20060236989A1 (en) * 2005-04-22 2006-10-26 Callahan Douglas J Heated pcv system
US7311091B2 (en) 2005-08-04 2007-12-25 Standard-Thomson Corporation Temperature-controlled PCV valve
US20070028904A1 (en) * 2005-08-04 2007-02-08 Standard-Thomson Corporation Temperature-controlled pcv valve
US20080099000A1 (en) * 2006-10-30 2008-05-01 Aisan Kogyo Kabushiki Kaisha PCV valve
US20080257321A1 (en) * 2007-04-18 2008-10-23 Artur Knaus Valve and Cylinder Head Cover for Crankcase Ventilation of an Internal Combustion Engine
DE102008005409A1 (en) 2007-04-18 2008-10-23 Dichtungstechnik G. Bruss Gmbh & Co. Kg Valve for the crankcase ventilation of an internal combustion engine
US7900612B2 (en) * 2007-04-18 2011-03-08 Dichtungstechnik G. Bruss Gmbh & Co. Kg Valve and cylinder head cover for crankcase ventilation of an internal combustion engine
DE102008005409B4 (en) * 2007-04-18 2012-08-09 Dichtungstechnik G. Bruss Gmbh & Co. Kg Valve for the crankcase ventilation of an internal combustion engine
US8087403B2 (en) * 2008-03-14 2012-01-03 Aisan Kogyo Kabushiki Kaisha Heating apparatus of electromagnetic PCV valve
US20090229584A1 (en) * 2008-03-14 2009-09-17 Aisan Kogyo Kabushiki Kaisha Heating apparatus of electromagnetic PCV valve
US20120006306A1 (en) * 2010-07-06 2012-01-12 Dichtungstechnik G. Bruss Gmbh & Co. Kg Housing for an Internal Combustion Engine with a PCV Valve for Crankcase Ventilation, and a Method for Attaching a PCV Valve to a Housing
US20120138031A1 (en) * 2010-12-01 2012-06-07 Kia Motors Corporation Pcv valve
US8505522B2 (en) * 2010-12-01 2013-08-13 Hyundai Motor Company PCV valve
US20130087222A1 (en) * 2011-10-07 2013-04-11 Aisan Kogyo Kabushiki Kaisha Flow control valves
US9410457B2 (en) * 2011-10-07 2016-08-09 Aisan Kogyo Kabushiki Kaisha Flow control valves
US20140069399A1 (en) * 2012-09-07 2014-03-13 Duane M. Eckard Turbo PCV Valve
US9670806B2 (en) * 2012-09-07 2017-06-06 Miniature Precision Components, Inc. Turbo PCV valve
US9976457B2 (en) 2012-09-07 2018-05-22 Miniature Precision Components, Inc. Turbo PCV valve
USD727970S1 (en) 2013-07-31 2015-04-28 Standard Motor Products, Inc. Combined positive crankcase ventilation valve and dynamic camshaft seal
US20200040919A1 (en) * 2018-07-31 2020-02-06 Emerson Process Management Regulator Technologies, Inc. Vent Limiting Device for Use with Fluid Regulators
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Also Published As

Publication number Publication date
DE2249802A1 (en) 1973-04-26
JPS4850128A (en) 1973-07-14
AU4710072A (en) 1974-03-21
GB1381137A (en) 1975-01-22
DE2249802C3 (en) 1974-08-01
CA956531A (en) 1974-10-22
DE2249802B2 (en) 1974-01-03
AU446508B2 (en) 1974-03-21
CA956531A1 (en)
JPS5214811B2 (en) 1977-04-25

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