EP1402155A1 - Recycling circuit for crankcase gases on an internal combustion engine - Google Patents
Recycling circuit for crankcase gases on an internal combustion engineInfo
- Publication number
- EP1402155A1 EP1402155A1 EP02758291A EP02758291A EP1402155A1 EP 1402155 A1 EP1402155 A1 EP 1402155A1 EP 02758291 A EP02758291 A EP 02758291A EP 02758291 A EP02758291 A EP 02758291A EP 1402155 A1 EP1402155 A1 EP 1402155A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder head
- valve
- head cover
- manifold
- 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.)
- Granted
Links
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 circuit for rebreathing the crankcase gases of an internal combustion engine.
- Patent application EP 724206 proposes an improved circuit comprising a diaphragm valve provided with a mouthpiece which can be connected to the nozzle of the casing gases and another mouthpiece which can be mounted directly on the intake manifold.
- a circuit always involves the attachment of a separate part to the manifold during assembly of the vehicle, with the risks of leakage which results 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 present invention therefore relates to a circuit for re-aspirating 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 whose design is easy to optimize based on a given engine.
- the present invention therefore relates to a circuit for re-aspirating 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 distinct compartments, one communicating with the atmosphere and the other with the downstream intake manifold of the throttle body and with a crankcase gas outlet, characterized in that the compartment communicating with the manifold and with the crankcase gas outlet is integrated into the intake manifold and / or the cylinder head cover, and in that the membrane makes it possible to seal part of the manifold and / or the cylinder head cover towards the atmosphere.
- internal combustion engine an internal combustion engine comprising at least one cylinder in which slides a piston driven by an alternating movement which is transformed into a rotary movement by means of a connecting rod-crank circuit and in which the chemical energy of combustion of a fuel is transformed into kinetic energy of rotation of a tree.
- the present invention applies to any type of internal combustion engine, but preferably to vehicle engines and in particular to petrol motor vehicles which comprise an intake manifold provided with a throttle body the purpose of which is to regulate the supply of combustion air to the engine cylinders.
- These engines are also equipped with a sump which includes the lubricating oil and a cylinder head cover which covers the cylinder head of the engine (where the oil is injected) and which ensures the sealing as well as a thermal insulation and phonic towards the outside.
- the casing and the cylinder head cover generally communicate with each other and constitute a circuit in which the crankcase gases circulate.
- these gases are taken from the crankcase / cylinder head cover circuit by means of a tapping generally carried out at its upper part.
- the valve which regulates the rate of suction of the crankcase gases according to the present invention is a diaphragm valve, that is to say that it comprises a diaphragm and a spring whose relative movement leads either to opening or closing a communication between the crankcase gas nozzle and the manifold.
- the diaphragm divides the valve into two compartments: one communicating with the atmosphere, and the other with the intake manifold and the connection of crankcase gases.
- the membrane also serves to ensure - J -
- the present invention advantageously makes it possible to eliminate the secondary rebreathing circuit by means of an adequate dimensioning, which will be detailed below.
- the entire suction flow is regulated by the valve described above.
- the manifold (1) and the cylinder head cover are separate parts and the valve is integrated into the manifold.
- the compartment (2) communicating with the manifold (1) and the connection of the crankcase gases (not shown) via a connection pipe (3) is integrated into the intake manifold, the membrane (4) serving to both to ensure the tightness of the collector and to regulate the rate of re-aspiration, together with the spring (5).
- the circuit according to this variant of the invention is reduced to the essentials: it essentially comprises a membrane / spring couple, a housing (7), a fitting towards the connection of the crankcase gases (3) and of the fixing means (such as clamps) of this connection respectively on the valve and on the connection (not shown).
- the housing (7) can be fixed in any suitable manner to the manifold, for example by clipping or welding.
- the membrane may include a reinforcement (8) at its center, where it comes into contact with the orifice. towards the collector (9), this orifice generally being in fact the end of a tube.
- 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 fitting (3) this time connects the valve to the manifold, 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 to the other variants, since it saves the connection either towards the stitching of the crankcase gases (variant 1) or towards the manifold (variant 2) and the means for fixing this connector. In fact, it suffices to position the valve straddling the manifold and the cylinder head cover and to allow direct connection of the crankcase gases under the cylinder head cover, via an orifice (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 manifold, cylinder head cover and rebreathing circuit
- the materials constituting the elements of the circuit according to the invention are chosen according to their weight, their mechanical strength and their workability, according to their function and their design.
- plastics in particular to reduce the weight of the assembly and facilitate its realization, it may prove to be advantageous to choose plastics as soon as possible, that is to say for the majority of parts, with the exception of be spring and hose clamps.
- the membrane and the connection to the stitching are preferably based on an elastomer (such as silicone, fluoro-silicone or acrylic modified rubber (ACM)), and preferably a fluorinated elastomer if the environment requires it;
- the clamps and the spring are often made of a metal resistant to the environment under the bonnet and to salt spray; and
- the valve housing is advantageously based on a thermoplastic material such as a polyamide or a polyolefin, but preferably a polyamide.
- This plastic material is preferably reinforced by means of a filler such as glass fibers.
- the housing is generally produced by molding, injection molding being particularly suitable.
- the present invention also relates to an integrated intake manifold for an internal combustion engine, said manifold incorporating the circuit valve according to the first variant of the invention.
- the present invention further relates to an integrated cylinder head cover for an internal combustion engine, the said cylinder head cover incorporating the circuit valve 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 / cylinder head cover incorporating the circuit valve according to the third variant of the invention.
- the present invention also relates to a method for the design of a crankcase gas rebreathing circuit of an internal combustion engine as described above.
- This process consists in optimizing the parameters (geometry, materials, etc.) of the valve described above as a function of the operating parameters of an engine, through the use of an engine test bench.
- engine test bench we mean a test bench which allows, depending on the characteristic points of the engine (function of the speed and torque) to impose a gas rebreathing rate and a vacuum at the intake. We then measure the value of the vacuum at the casing and compare the value with that of the specifications of the vehicle manufacturer.
- the present invention finally relates to a membrane valve for a suction circuit, an integrated intake manifold and / or a cylinder head cover as described above, this valve preferably being mainly made of plastic.
- mainly plastic is meant that the valve housing is made of plastic, preferably injection moldable (such as a polyamide or a polyolefin, possibly loaded 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)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0108789 | 2001-07-02 | ||
FR0108789A FR2826691B1 (en) | 2001-07-02 | 2001-07-02 | CIRCUIT FOR RESPIRATING THE CRANKCASE GASES OF AN INTERNAL COMBUSTION ENGINE |
PCT/EP2002/007265 WO2003004836A1 (en) | 2001-07-02 | 2002-07-02 | Recycling circuit for crankcase gases on an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1402155A1 true EP1402155A1 (en) | 2004-03-31 |
EP1402155B1 EP1402155B1 (en) | 2007-12-12 |
Family
ID=8865052
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02758291A Expired - Lifetime EP1402155B1 (en) | 2001-07-02 | 2002-07-02 | Recycling circuit for crankcase gases on an internal combustion engine |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040211400A1 (en) |
EP (1) | EP1402155B1 (en) |
AT (1) | ATE380927T1 (en) |
DE (1) | DE60224042D1 (en) |
FR (1) | FR2826691B1 (en) |
WO (1) | WO2003004836A1 (en) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10201823A1 (en) * | 2002-01-18 | 2003-07-31 | Bosch Gmbh Robert | Pressure control valve for crankcase ventilation of an internal combustion engine |
US8057567B2 (en) | 2004-11-05 | 2011-11-15 | Donaldson Company, Inc. | Filter medium and breather filter structure |
WO2006052732A2 (en) | 2004-11-05 | 2006-05-18 | Donaldson Company, Inc. | Filter medium and structure |
JP5308031B2 (en) | 2005-02-04 | 2013-10-09 | ドナルドソン カンパニー,インコーポレイティド | Ventilation filter and ventilation filtration assembly |
WO2006091594A1 (en) | 2005-02-22 | 2006-08-31 | Donaldson Company, Inc. | Aerosol separator |
US7999994B2 (en) | 2005-02-23 | 2011-08-16 | Pixtronix, Inc. | Display apparatus and methods for manufacture thereof |
US9158106B2 (en) | 2005-02-23 | 2015-10-13 | Pixtronix, Inc. | Display methods and apparatus |
US8519945B2 (en) | 2006-01-06 | 2013-08-27 | Pixtronix, Inc. | Circuits for controlling display apparatus |
US9229222B2 (en) | 2005-02-23 | 2016-01-05 | Pixtronix, Inc. | Alignment methods in fluid-filled MEMS displays |
US9261694B2 (en) | 2005-02-23 | 2016-02-16 | Pixtronix, Inc. | Display apparatus and methods for manufacture thereof |
US8482496B2 (en) | 2006-01-06 | 2013-07-09 | Pixtronix, Inc. | Circuits for controlling MEMS display apparatus on a transparent substrate |
US9082353B2 (en) | 2010-01-05 | 2015-07-14 | Pixtronix, Inc. | Circuits for controlling display apparatus |
US20070205969A1 (en) | 2005-02-23 | 2007-09-06 | Pixtronix, Incorporated | Direct-view MEMS display devices and methods for generating images thereon |
US8310442B2 (en) | 2005-02-23 | 2012-11-13 | Pixtronix, Inc. | Circuits for controlling display apparatus |
US8159428B2 (en) | 2005-02-23 | 2012-04-17 | Pixtronix, Inc. | Display methods and apparatus |
US7441551B2 (en) * | 2005-08-22 | 2008-10-28 | Honda Motor Co., Ltd. | Intake manifold |
DE202005020261U1 (en) * | 2005-12-23 | 2007-05-10 | Mann + Hummel Gmbh | Crankcase ventilator for combustion engine, has ventilation channel whereby ventilation channel has section of interior surface, which is anti-adhesive for water |
US8526096B2 (en) | 2006-02-23 | 2013-09-03 | Pixtronix, Inc. | Mechanical light modulators with stressed beams |
US9176318B2 (en) | 2007-05-18 | 2015-11-03 | Pixtronix, Inc. | Methods for manufacturing fluid-filled MEMS displays |
US8169679B2 (en) | 2008-10-27 | 2012-05-01 | Pixtronix, Inc. | MEMS anchors |
US8056545B2 (en) * | 2009-01-06 | 2011-11-15 | Ford Global Technologies | Integrated cover and exhaust gas recirculation cooler for internal combustion engine |
WO2011097252A2 (en) | 2010-02-02 | 2011-08-11 | Pixtronix, Inc. | Methods for manufacturing cold seal fluid-filled display apparatus |
CN102834859B (en) | 2010-02-02 | 2015-06-03 | 皮克斯特罗尼克斯公司 | Circuits for controlling display apparatus |
FR2961191B1 (en) * | 2010-06-10 | 2012-07-27 | Rexam Healthcare La Verpillier | PUMP FOR DELIVERING A PRODUCT HAVING A SLIDING PISTON IN A DOSING CHAMBER |
US9134552B2 (en) | 2013-03-13 | 2015-09-15 | Pixtronix, Inc. | Display apparatus with narrow gap electrostatic actuators |
DE102015005692A1 (en) * | 2015-05-06 | 2016-11-10 | Mann + Hummel Gmbh | Pressure control valve |
DE102016013010A1 (en) * | 2016-11-02 | 2018-05-03 | Mann + Hummel Gmbh | Unit for regulating or controlling a fluid pressure |
DE102017010018A1 (en) * | 2016-11-02 | 2018-05-03 | Mann + Hummel Gmbh | Unit for regulating or controlling a fluid pressure |
DE102017010071A1 (en) * | 2016-11-02 | 2018-05-03 | Mann+Hummel Gmbh | Unit for regulating or controlling a fluid pressure |
DE102018118267A1 (en) * | 2018-07-27 | 2020-01-30 | Woco Industrietechnik Gmbh | Elastomer component exposed to blow-by gases from an internal combustion engine |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3380441A (en) * | 1965-08-23 | 1968-04-30 | Gen Motors Corp | Crankcase ventilation flow regulator valve |
US4602607A (en) * | 1985-02-25 | 1986-07-29 | General Motors Corporation | Internal crankcase ventilation system with easily accessible PCV valve |
US4703738A (en) * | 1986-06-26 | 1987-11-03 | General Motors Corporation | Purge flow control valve |
US4760833A (en) * | 1986-09-02 | 1988-08-02 | Tatyrek Alfred F | Engine crankcase vacuum check valve system for internal combustion engines |
DE4022129A1 (en) * | 1990-07-11 | 1992-01-16 | Mann & Hummel Filter | PRESSURE CONTROL VALVE FOR INSTALLATION IN A BLEEDING LINE ON AN INTERNAL COMBUSTION ENGINE |
DE19501447A1 (en) | 1995-01-19 | 1996-07-25 | Bosch Gmbh Robert | Pressure control valve |
DE19645665A1 (en) * | 1996-11-06 | 1998-05-07 | Mann & Hummel Filter | Valve unit |
DE19732367A1 (en) * | 1997-07-28 | 1999-02-04 | Volkswagen Ag | Crankcase ventilation valve for an internal combustion engine |
JPH11117722A (en) * | 1997-10-20 | 1999-04-27 | Honda Motor Co Ltd | Blowby gas reflux device |
DE19835564A1 (en) * | 1998-08-06 | 2000-02-10 | Volkswagen Ag | Cylinder head cover |
US6478019B2 (en) * | 1999-09-01 | 2002-11-12 | Nelson Industries, Inc. | Flat low profile diesel engine crankcase ventilation filter |
US6293268B1 (en) * | 1999-10-07 | 2001-09-25 | Siemens Automotive, Inc. | Positive crankcase ventilation system |
SE522391C2 (en) * | 2000-01-26 | 2004-02-03 | Volvo Personvagnar Ab | Crankcase and exhaust ventilation in a supercharged internal combustion engine |
US6553979B2 (en) * | 2000-05-25 | 2003-04-29 | Asco Controls, Lp | Pressure-regulating piston with built-in relief valve |
US6422224B1 (en) * | 2000-11-02 | 2002-07-23 | Walker Design, Inc. | Remote air-oil separator |
JP2002155720A (en) * | 2000-11-20 | 2002-05-31 | Yamaha Motor Co Ltd | Union structure of blow-by gas reducing device |
DE10127819A1 (en) * | 2001-06-07 | 2003-01-02 | Bosch Gmbh Robert | Oil separator for crankcase gases of an internal combustion engine |
JP3923288B2 (en) * | 2001-08-06 | 2007-05-30 | 本田技研工業株式会社 | Engine gas-liquid separator |
-
2001
- 2001-07-02 FR FR0108789A patent/FR2826691B1/en not_active Expired - Fee Related
-
2002
- 2002-07-02 DE DE60224042T patent/DE60224042D1/en not_active Expired - Lifetime
- 2002-07-02 WO PCT/EP2002/007265 patent/WO2003004836A1/en active IP Right Grant
- 2002-07-02 EP EP02758291A patent/EP1402155B1/en not_active Expired - Lifetime
- 2002-07-02 AT AT02758291T patent/ATE380927T1/en not_active IP Right Cessation
-
2003
- 2003-12-30 US US10/747,260 patent/US20040211400A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO03004836A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1402155B1 (en) | 2007-12-12 |
ATE380927T1 (en) | 2007-12-15 |
DE60224042D1 (en) | 2008-01-24 |
FR2826691A1 (en) | 2003-01-03 |
WO2003004836A1 (en) | 2003-01-16 |
FR2826691B1 (en) | 2003-09-26 |
US20040211400A1 (en) | 2004-10-28 |
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