• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a solenoid valve (10) comprising: - a housing (12) provided with a fluid inlet (14) and a fluid outlet (18), - a bobbin (28) d electromagnet disposed in the housing (12), - an armature (36) of magnetic material located opposite one end of a magnetic core (30) of said bobbin (28) and movable along an axis of said core (30) between a first open position and a second closed position of said outlet port (18), the bobbin (28) being made of polytetrafluoroethylene filled plastic material.
    公开号:FR3036456A1
    申请号:FR1554517
    申请日:2015-05-20
    公开日:2016-11-25
    发明作者:De Azevedo Jose Vaz
    申请人:Valeo Systemes de Controle Moteur SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a solenoid valve, and more particularly to a purge solenoid valve for evacuation of vapors, as well as to a motor and a motor vehicle comprising such a solenoid valve. Such solenoid valves may find a preferred, although not exclusive, application in gasoline vapor recovery devices that accumulate in fuel tanks above the liquid phase. These devices are intended to accompany a spark ignition engine, particularly in motor vehicles, to prevent the discharge of said vapors directly into the atmosphere. In known manner such a solenoid valve comprises an electromagnetic coil wound on the hub of a plastic bobbin and a metal core disposed inside this hub. A valve is disposed facing the core to be axially displaced by the electromagnetic forces, from a position where it closes a fluid flow conduit to another position in which the conduit is open. The valve is held normally closed by a spring. In these solenoid valves, the coil is supplied with current. When the current feeds the coil, the valve is moved to close a fluid passage, and vice versa when the current no longer feeds the coil. The valve is therefore required to move very often. During these repeated movements wear is created between the valve and the bobbin. This wear is in direct relation with the coefficient of friction between the materials in contact during the displacement. Beyond a certain level of wear the product does not work properly.
    [0002] The present invention therefore aims to overcome one or more of the drawbacks of prior art devices by providing a solenoid valve comprising: a housing provided with a fluid inlet orifice and a fluid outlet orifice, an electromagnet winding disposed in the housing, an armature of magnetic material located facing one end of a magnetic core of said winder and movable along an axis of said core between a first open position and a second closing position of said outlet orifice, the bobbin being made of plastic material loaded with polytetrafluoroethylene.
    [0003] According to one embodiment of the invention, the bobbin is entirely of polytetrafluoroethylene. According to one embodiment of the invention, the bobbin is obtained by overmolding. According to one embodiment of the invention, the solenoid valve comprises a seat, 10 of a shutter member, integral with the outlet orifice. According to one embodiment of the invention, the solenoid valve comprises a shutter member secured to displacement of the armature, the shutter member being spaced apart or in abutment against the seat when the armature is, respectively, in its first or second position.
    [0004] The invention also relates to a motor vehicle engine, comprising at least one solenoid valve according to the invention. The invention also relates to a motor vehicle, comprising an engine according to the invention. The invention also relates to the use of the solenoid valve according to the invention for the evacuation of petrol vapors in a motor vehicle. Other objects, features and advantages of the invention will be better understood and will appear more clearly on reading the description given hereinafter with reference to the appended figures given by way of example and in which: FIG. 1 is a schematic representation of a longitudinal sectional view of an embodiment of a part of a device according to the invention; FIG. 2 is a schematic representation of a longitudinal sectional view of FIG. an embodiment of a part of a device according to the invention, - Figure 3 is an elevational view of an embodiment of a winding according to the invention.
    [0005] A solenoid valve 10 according to the invention, illustrated in FIGS. 1 and 2, comprises a housing 12, for example made of a rigid plastic material. The lower housing body forms a vessel whose bottom has an inlet port 14 extended by an inlet conduit 16 5 for connection to a vapor inlet conduit. The housing body 12 is provided with a vapor outlet port 18 extended by an outlet conduit 20 for connection to a non-illustrated vapor discharge conduit. According to one embodiment of the invention, the outlet duct is a nozzle. A magnetic material circuit 22 is disposed in the housing body 12 and surrounds an electromagnet coil 28, also illustrated in FIG. 3. The coil 28 is secured to the housing by means of a mechanical connection, not referenced, comprising for example one or more flanges. The bobbin 28 comprises in its center a tubular magnetic core 30 of general rod shape through which the gases flow. An electric winding 32 is fixedly mounted around the center of the bobbin 28.
    [0006] A metal reinforcement 36, also called a valve 36, also illustrated in FIG. 2, formed of a metal plate made of magnetic material, is situated facing the upper end of the magnetic core 30 and carries a shutter member 38, known and described in FIG. French application 1553525, made of a material adapted to cooperate sealingly with a seat 48 of the solenoid valve 10 which is formed by the inner end of the outlet duct 18. The shutter member 38 is constituted by a layer of a sealing material, such as elastomer, deposited on the upper face of the metal reinforcement 36. According to an embodiment illustrated in FIG. 3, the bobbin 28 comprises elements 40 for guiding the metal reinforcement or valve. 36. According to one embodiment of the invention, the metal frame 36 and the shutter member 38 comprises an opening 60 allowing the passage of the fluid. The valve 36, movable along an axis X of said core 30, can thus take a first open position of the vapor flow in the outlet orifice 18 and a second position for closing said flow of vapors. In the absence of the application of a magnetic field, the shutter member is constrained to bear on the seat 48 by an elastic member such as a spring 70. When a magnetic field is applied, this ci goes against the force of the spring and moves the metal armature 36 in its first open position which moves the shutter member away from the seat 48. As explained above, the valve 36 is therefore caused to move very often. These repeated movements create a wear between the valve 36 and the bobbin 28, 5 and the guide elements 40 of the bobbin 28. In order to limit this wear, the invention provides a bobbin 28 made of plastic material loaded with polytetrafluoroethylene (also known as PTFE logo). This material, in addition to excellent thermal and chemical resistance, has an extremely low coefficient of friction.
    [0007] According to one embodiment of the invention, the bobbin 28 is entirely of polytetrafluoroethylene. According to one embodiment of the invention, the PTFE bobbin 28 is made by overmolding. The bobbin 28 is overmolded. Thus, the solenoid valve 10 according to the invention operates with maximum performances, even beyond a certain number of cycles of high use and for example even beyond 100 to 200 million cycles. The scope of the present invention is not limited to the details given above and allows embodiments in many other specific forms without departing from the scope of the invention. Therefore, the present embodiments should be considered by way of illustration, and may be modified without departing from the scope defined by the claims.
    权利要求:
    Claims (8)
    [0001]
    REVENDICATIONS1. Solenoid valve (10) comprising: - a housing (12) having a fluid inlet (14) and a fluid outlet (18), - an electromagnet coil (28) disposed in the housing (12), - an armature (36) of magnetic material located opposite one end of a magnetic core (30) of said winding (28) and movable along an axis of said core (30) between a first position of opening and a second closing position of said outlet orifice (22), characterized in that the bobbin (28) is made of plastic material loaded with polytetrafluoroethylene.
    [0002]
    2. Solenoid valve according to claim 1, wherein the bobbin (28) is entirely of polytetrafluoroethylene.
    [0003]
    3. Solenoid valve according to one of claims 1 or 2, wherein the bobbin (28) is obtained by overmolding.
    [0004]
    4. Solenoid valve (10) according to one of claims 1 to 3, comprising a seat (48), a shutter member (38) integral with the outlet (18),
    [0005]
    5. Solenoid valve according to one of claims 1 to 4, comprising a shutter member (38) integral with displacement of the armature (36), the shutter member (38) being spaced apart or in abutment against the seat (48) when the armature (36) is, respectively, in its first or second position.
    [0006]
    6. motor vehicle engine, characterized in that it comprises at least one solenoid valve (10) according to one of claims there 5.
    [0007]
    7. Motor vehicle, characterized in that it comprises an engine according to claim 6.
    [0008]
    8. Use of the solenoid valve according to one of claims 1 to 5 for the evacuation of gasoline vapors in a motor vehicle.
    类似技术:
    公开号 | 公开日 | 专利标题
    WO2016185146A1|2016-11-24|Solenoid purge valve for vapor discharge device
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    FR2955170A1|2011-07-15|Gas expander integrated tap for use in pressurized gas cylinder, has push-valve and pressure valve arranged in same housing of body, where push-valve is selectively moved independent of pressure valve for actuating insulation valve
    FR3082269A1|2019-12-13|ELECTROMAGNETIC DEVICE COMPRISING A FLUID CIRCULATION BOX AND A COIL CONFIGURED TO LIMIT THE TRANSMISSION OF VIBRATIONS
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    WO2016170268A1|2016-10-27|Blowdown electrovalve for vapour venting device
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    FR3034161A1|2016-09-30|HIGH PRESSURE VALVE SEALED ACTUATOR
    同族专利:
    公开号 | 公开日
    DE112016002269T5|2018-02-08|
    WO2016185146A1|2016-11-24|
    FR3036456B1|2017-12-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4496134A|1980-09-03|1985-01-29|Nippon Soken, Inc.|Rotary solenoid actuator|
    US4470030A|1983-05-18|1984-09-04|Ledex, Inc.|Trip solenoid|
    US5560585A|1992-12-24|1996-10-01|Robert Bosch Gmbh|Valve for metering introduction of evaporated fuel into an induction duct of an internal combustion engine|
    US5809977A|1995-05-05|1998-09-22|Robert Bosch Gmbh|Valve for metered introduction of volatilized fuel|
    US5809978A|1995-09-12|1998-09-22|Robert Bosch Gmbh|Adsorption filter for a fuel-vapor retention system of a fuel tank of an internal combustion engine|
    WO2000075502A1|1999-06-08|2000-12-14|Sagem|Solenoid bleed valve for a device for the disposal of vapours|
    EP2015376A1|2006-04-14|2009-01-14|Showa Denko K.K.|Method of controlling regulating hole|
    US20120176724A1|2010-12-15|2012-07-12|John Antony Burrows|Corona igniter including ignition coil with improved isolation|
    EP2687763A1|2011-03-17|2014-01-22|T & D Corporation|Valve system|
    DE1729665A1|1967-04-27|1971-07-08|Goetzewerke|Process for transfer molding and vulcanizing molded articles|FR3082269A1|2018-06-06|2019-12-13|Valeo Systemes De Controle Moteur|ELECTROMAGNETIC DEVICE COMPRISING A FLUID CIRCULATION BOX AND A COIL CONFIGURED TO LIMIT THE TRANSMISSION OF VIBRATIONS|
    FR3082271A1|2018-06-06|2019-12-13|Valeo Systemes De Controle Moteur|ELECTROMAGNETIC DEVICE COMPRISING A FLUID CIRCULATION HOUSING AND A COIL WITH A BELL|
    FR3090186A1|2018-12-17|2020-06-19|Valeo Systeme De Controle Moteur|Electromechanical device|
    法律状态:
    2016-05-27| PLFP| Fee payment|Year of fee payment: 2 |
    2016-11-25| PLSC| Publication of the preliminary search report|Effective date: 20161125 |
    2017-05-30| PLFP| Fee payment|Year of fee payment: 3 |
    2018-05-28| PLFP| Fee payment|Year of fee payment: 4 |
    2019-05-31| PLFP| Fee payment|Year of fee payment: 5 |
    2020-05-30| PLFP| Fee payment|Year of fee payment: 6 |
    2021-05-31| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1554517A|FR3036456B1|2015-05-20|2015-05-20|PURGE SOLENOID VALVE FOR VAPOR EXHAUST DEVICE|FR1554517A| FR3036456B1|2015-05-20|2015-05-20|PURGE SOLENOID VALVE FOR VAPOR EXHAUST DEVICE|
    DE112016002269.7T| DE112016002269T5|2015-05-20|2016-05-19|Drain solenoid valve for a vapor extraction device|
    PCT/FR2016/051186| WO2016185146A1|2015-05-20|2016-05-19|Solenoid purge valve for vapor discharge device|
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