EP0507997B1 - Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine - Google Patents

Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine Download PDF

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Publication number
EP0507997B1
EP0507997B1 EP91121309A EP91121309A EP0507997B1 EP 0507997 B1 EP0507997 B1 EP 0507997B1 EP 91121309 A EP91121309 A EP 91121309A EP 91121309 A EP91121309 A EP 91121309A EP 0507997 B1 EP0507997 B1 EP 0507997B1
Authority
EP
European Patent Office
Prior art keywords
valve
valve housing
adjusting
drive shaft
sealing body
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.)
Expired - Lifetime
Application number
EP91121309A
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German (de)
English (en)
French (fr)
Other versions
EP0507997A2 (de
EP0507997A3 (en
Inventor
Sebastian Zabeck
Andreas Sausner
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
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
Priority to AT91121309T priority Critical patent/ATE103671T1/de
Publication of EP0507997A2 publication Critical patent/EP0507997A2/de
Publication of EP0507997A3 publication Critical patent/EP0507997A3/de
Application granted granted Critical
Publication of EP0507997B1 publication Critical patent/EP0507997B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold

Definitions

  • the invention relates to a device for the temporary storage and metered feeding of the volatile fuel components located in the free space of a tank system into the intake pipe of an internal combustion engine, comprising a vent line connecting the free space with the atmosphere, in which a storage chamber with an absorption element is arranged and one with the storage chamber line connecting the intake pipe, which line can be closed by a continuously controllable valve forming a component of the line, a throttle valve mounted on a drive shaft being arranged in the intake pipe.
  • Such a device is known from DE-PS 38 02 664.
  • the valve and the throttle valve can be actuated independently of one another, the throttle valve being actuated mechanically and the valve being actuated using electronic and electromechanical means. These means are connected to one another in a signal-conducting manner and to sensors which continuously record various characteristics of the internal combustion engine during operation. The construction and assembly of such a device are accordingly complex.
  • a device for feeding volatile fuel components into the intake pipe of an internal combustion engine comprising a valve which is controlled mechanically via the throttle valve to switch from storage mode to purging mode.
  • the invention is based on the object of further developing a device in such a way that there is a simplified construction and assembly, and excellent performance characteristics over a long service life.
  • the valve comprises an actuator which can be mechanically controlled by the drive shaft. While ensuring good operating behavior and good functionality of the internal combustion engine, this enables proper feeding of volatile fuel components into the intake pipe of the connected internal combustion engine.
  • the device can thus also be used in the production of inexpensive motor vehicles. Furthermore, there is an excellent reliability of the device in that it is arranged purely mechanically and without the use of sensors between the absorption element and the suction pipe.
  • the valve is designed as a rotary slide valve, with a valve housing and two adjusting discs mounted in the valve housing, which touch each other relatively rotatably and which are each provided with at least one passage opening that can be brought into alignment outside of their axis of rotation, the first adjusting disc is rotatable by the drive shaft and the second adjusting disc is non-rotatably mounted in the valve housing.
  • the advantage here is that there is a particularly small design of the valve, consisting of a few individual parts and that the drive of the rotary valve via the drive shaft, on which the throttle valve is also mounted, is particularly simple. Even the size of the at least partially covering through openings can be adjusted particularly sensitively to the respective operating state of the internal combustion engine. The small design and the few individual parts used result in a low weight of the device and low manufacturing costs.
  • the first adjusting disk and the drive shaft can be connected to one another by a connecting device, the connecting device being formed by a one-sided positive guidance. It is advantageous here that in the event of malfunctions within the device, the mobility of the throttle valve, at least in the direction of the closed position, is maintained in the intake manifold, which can contribute, for example, to the functional reliability of a motor vehicle.
  • the connecting device can consist, for example, of two levers, the first lever being non-positively connected to the drive shaft of the throttle valve and the second lever being non-positively connected to one of the adjusting disks.
  • a driver can be arranged on the first lever, for example, which only touches the second lever in the opening direction of the throttle valve and, when actuated, transfers the shut-off valve against the spring force, for example a torsion spring, into the open position. If the throttle valve is in the open position, it can be moved to the closed position at any time, even if malfunctions occur within the device.
  • the spring force for example a torsion spring
  • the second adjusting disc can only be mounted so as to be movable in the direction of the axis of rotation and can be secured against rotation and sealed by a membrane with respect to the valve housing. Due to the rotatable mounting of the first adjusting disc relative to the second adjusting disc, which is non-rotatably mounted in the housing a perfect sealing of the two adjusting discs against each other, also guaranteed over a long service life. Even slight wear on one of the two adjusting disks does not impair the sealing in this area, in that the second adjusting disk is supported in the valve housing by means of a compression spring and pressed against the first adjusting disk.
  • a membrane is provided, which can be clamped, for example, between the two valve housing parts and vulcanized on the second adjusting disc. If the through openings of the two adjusting disks are closed, no volatile fuel components get into the intake pipe of the internal combustion engine.
  • the spring characteristic of the compression spring if it is designed as a helical compression spring, can be adjusted particularly easily to the material-specific characteristics of the two adjusting disks. This results in excellent performance during a long service life of the valve.
  • the two adjusting disks are rotatably supported one inside the other.
  • This can be achieved, for example, by means of a bearing journal which is connected in one piece to the first adjusting disc and which, if necessary, can be spherical, for example in order to compensate for manufacturing tolerances.
  • the bearing journal can be mounted in a journal journal of the second adjusting disk.
  • a further embodiment can consist in that the bearing journal is integrally connected to the second adjusting disk and is mounted in a journal journal receptacle of the first adjusting disk.
  • both the first and the second adjusting disk can be provided with a bearing journal receptacle, one in the axial direction coaxial with the axis of rotation separate bearing pin is arranged, which connects the two adjusting discs with each other.
  • the membrane can be non-rotatably fastened to the second adjusting disk in the axial direction, facing the drive shaft, and can have at least one recess with sealing edges which essentially correspond in size and shape to the passage openings.
  • the membrane forms the second adjusting disk.
  • the compression spring is supported directly on the one hand on the membrane and on the other hand in the valve housing. An additional component fixed to the membrane is not required in this embodiment.
  • At least one of the adjusting disks can be provided with a friction-reducing surface coating in the region of the mutual contact surfaces.
  • a PTFE film which can be filled with another material, is particularly suitable for a surface coating.
  • a lubricating varnish can also be used.
  • an intermediate washer made of elastomeric material can be used in the direction of The axis of rotation and can be fastened relatively non-rotatably and sealingly to one of the two adjusting disks.
  • the washer made of elastomeric material enables compensation of tolerances in the circumferential direction of the two adjusting disks, for example if they are not absolutely plane-parallel to each other, this will not affect the function of the valve, but will compensated by the washer. Proper functioning of the device is also ensured in such a case.
  • the valve is designed as a slide valve, with a valve housing and an actuating piston which is axially movably mounted in the valve housing and which, by means of a connecting element, touches the coaxially arranged, axially movable sealing body in such a way that the sealing body cannot rotate, Relatively immovable in the valve housing arranged sealing seat is assigned and that the actuating piston and the sealing body can be actuated together by a non-rotatable cam mounted on the drive shaft.
  • the advantage here is that the radial connection of the device to the drive shaft results in particularly small dimensions in the direction of the drive shaft.
  • the sealing body is provided with a sealing cone that is self-centering on the sealing seat.
  • the sealing seat advantageously consists of an elastomeric material due to the self-locking that may occur.
  • the gas throughput is regulated by the valve in the direction of the intake pipe of the internal combustion engine.
  • the valve housing can consist of a first and a second valve housing part, wherein the first valve housing part can be mounted coaxially in the second valve housing part and can be sealed against it by O-ring seals.
  • This configuration enables the valve according to the invention to be manufactured and assembled particularly easily. It can be adapted very well to the particular circumstances of the application.
  • the first and the second valve housing part can be formed in one piece.
  • the advantage here is that simplified assembly and greater operational reliability of the device result.
  • the two valve housing parts can, for example, consist of a plastic with good sliding properties. This ensures good performance characteristics over a long period of use.
  • the two valve housing parts are essentially tubular, at least the valve housing part receiving the actuating piston being able to consist of a low-friction and wear-resistant material in the region of the mutual contact surfaces.
  • a surface coating which can be arranged in the radial direction between the first valve housing part and the actuating piston, brings about a particularly low-friction displacement of the actuating piston in its guidance. Another advantage is the sensitive and particularly precise actuation of the valve, which requires a precisely defined throughput of volatile fuel components into the intake pipe of the internal combustion engine.
  • the contacting components which are movable relative to each other, can be made of plastic, for example Polyamide or polyimide exist.
  • the actuating piston can also be made of this material, for example. This is also advantageous in view of the light weight of the device.
  • a bushing or a film made of friction-reducing material is arranged between the actuating piston and the first valve housing part.
  • a compression spring which is supported in the housing and presses the sealing body against the actuating piston, ensures that the sealing body is reset without delay.
  • the spring determines the size of the restoring force with which the at least partially conical sealing body is pressed onto its sealing seat, which preferably consists of an elastomeric material. Due to the arrangement of the sealing cone and the one-sided positive guidance of the connecting device, the check valve can be moved into the closed position without actuating force. If the sealing cone is arranged differently, the blocking valve can, if this makes sense, be moved to the open position without actuating force.
  • the valve is designed as a slide valve, with a valve housing and a cylindrical actuating piston which is only movably mounted in the valve housing in the direction of the axis of rotation and which touches the sealing body by means of a connecting member, the sealing body being a Non-rotatable, relatively immovable sealing seat arranged in the valve housing is assigned that the actuating piston has a single-sided external thread along its outer circumference, which is in engagement with a single-sided internal thread of an actuating part and that the actuating part is rotatably arranged in the valve housing and is non-rotatably mounted on the drive shaft.
  • the sealing body is at least partially conical and can be lifted off its sealing seat, which preferably consists of an elastically deformable material, when the valve is opened.
  • the elastically deformable material prevents self-locking of the sealing body in the sealing seat and promotes self-centering.
  • the engaged single-sided thread of the actuating piston and actuating part results in a rotation of the actuating part when the drive shaft rotates, so that the actuating piston, depending on the direction of rotation of the drive shaft, can only be moved in translation in the direction of the axis of rotation.
  • the axial movement of the actuating piston causes a change in the passage cross section between the sealing body and the adjacent valve seat and thereby a change in the throughput of volatile fuel components through the valve into the intake pipe of the internal combustion engine.
  • the actuating piston and the actuating part consist of a friction-reducing surface, at least in the area of their mutual contact surfaces.
  • a further reduction in the actuating force of the valve results if the contact surfaces between the actuating part and the valve housing are also provided with a friction-reducing surface coating. This further facilitates the exact actuation of the valve. It is also possible to manufacture the components that come into contact with one another from wear-resistant and low-friction plastic.
  • the surface coating can be made of PTFE, for example. This coating is extremely low-wear and very wear-resistant due to the increasing glazing of the surface during operation. Friction-reducing PTFE components can be embedded in plastic, for example.
  • a pressure spring is provided to reset the actuating piston and thus to place the sealing body on its sealing seat, which supports the closing movement of the throttle valve in the intake pipe of the internal combustion engine. This compression spring presses the sealing body onto the actuating piston without play.
  • An electromagnetic switching valve can be assigned to the valve, which closes the supply line if necessary and is connected in a signal-conducting manner to an engine control.
  • the advantage here is that there is an improved function of the device and the function of the device can be influenced by the engine control.
  • the electromagnetic switching valve can be actuated or clocked, for example be integrated in the valve housing for better utilization of the enclosed space.
  • a throttle valve switch is assigned to the valve housing and that the throttle valve switch is integrated in the valve housing.
  • a potentiometer can also be used, for example. This configuration results in extremely compact dimensions of the entire device.
  • Fig. 1 shows the device according to the invention, wherein the valve is designed as a rotary slide valve.
  • FIG. 2 shows a section of the device according to FIG. 1, however, with a sealing body which can be moved in translation and can be controlled in the radial direction.
  • Fig. 3 shows a device, similar to Fig. 2, in which the valve comprises a translationally movable sealing body with axial control.
  • a vent line 7 connecting the free space 5 to the atmosphere is provided, in which a storage chamber 8 with an absorption element made of activated carbon is arranged, as well as a storage chamber 8 with the intake pipe 6 connecting line 2, which can be closed by a valve 1, wherein a throttle valve 3 mounted on a drive shaft 4 is arranged in the intake pipe 6.
  • the valve 1 comprises, as an actuator, a rotary slide valve which can be actuated by the drive shaft 4 and a connecting device 29.
  • the rotary slide valve essentially consists of two adjusting disks 10, 11 which are arranged and mounted in the valve housing 9 and touch each other in a relatively rotatable manner. Passage openings 10.1, 11.1 are arranged in the adjusting disks 10, 11, which can have passage openings 10.1, 11.1 of different sizes depending on the respective application.
  • the first adjusting disc 10 is rotatably mounted in the valve housing 9 by the drive shaft 4 relative to the second adjusting disc 11.
  • the first adjusting disc 10 is provided with a shim 16, which is vulcanized directly onto the first adjusting disc 10. Alternatively, it can be provided that the shim 16 is pushed or glued onto the first adjusting disc 10.
  • the shim 16 is provided with a surface coating 15, which is formed by a film made of PTFE.
  • the two adjusting disks 10, 11 rest against one another outside the at least partially overlapping through openings 10.1, 11.1 in a rotationally movable and gas-tight manner.
  • a membrane 13 made of elastomeric material, for example an elastomer, is provided for sealing the valve housing 9 against the atmosphere and for sealing the inlet space and the outlet space, which is clamped between the two housing halves and fixed to the second adjusting disk 11.
  • the membrane 13 also forms an anti-rotation device for the second adjusting disk 11. An excellent seal between the gas inlet and This causes gas to escape when the through openings 10.1, 11.1 are closed.
  • the second adjusting disk 11 is supported in the direction of the axis of rotation 12 by means of a compression spring 14 in the valve housing 9 and is pressed against the first adjusting disk 10.
  • the two adjusting disks 10, 11 are rotatably fixed in one another via a bearing journal of the first adjusting disk 10 which is arranged coaxially to the axis of rotation 12 and is mounted in a recess in the second adjusting disk 11.
  • the pin can be cylindrical or crowned.
  • a further spring is provided, which is designed as a torsion spring 24.
  • a seal 25 is provided between the drive shaft 4 and the valve housing 9, which seals the drive opening from the surroundings.
  • the electromagnetically actuated switching valve 30, which can be assigned to the valve 1 and closes the line 2 if necessary, can be connected in a signal-conducting manner to an engine control, not shown. There is the possibility that the electromagnetically actuated switching valve 30 is arranged within the line 2 or integrated into the valve housing. If the switching valve 30 is integrated in the valve housing, a device that is particularly easy to install results.
  • valve 1 which can be controlled in the radial direction of the drive shaft 4 by a cam 21. The following must be carried out for valve 1 to function:
  • the cam 21 is rotatably mounted on the drive shaft 4, which is formed by the throttle valve shaft. Depending on the position of the throttle valve, the Cam 21 on the surface of the actuating piston 17, which is mounted in the first valve housing part 9.1.
  • a surface coating 15 is provided in the form of a friction-reducing bush.
  • the sealing body 19 is at least partially conical and lies in this area, when the valve is in the closed position, in a sealing manner against its sealing seat 20.
  • the sealing seat 20 and / or the sealing cone consist of an elastically deformable material, for example an elastomer.
  • the sealing body 19 In the axial direction, facing away from the actuating piston 17, the sealing body 19 is provided with a guide 26 which is in a guide bushing 27.
  • O-ring seals 28 are provided, which are arranged between the coaxially arranged valve housing parts 9.1, 9.2, which are mounted one inside the other in the radial direction.
  • the closing movement of the valve is effected by a compression spring 23 which is arranged between the housing part 9.1 and the sealing body 19 and presses it against the actuating piston 17 without play.
  • a valve 1, which is part of the device according to the invention, is shown as a separate component.
  • the sealing body 19 is also translationally movable, as in FIG. 2, but the actuation part 22 is actuated by the drive shaft 4, on which the throttle valve, which is not shown here, is also arranged in the axial direction.
  • the function of the valve 1 shown here corresponds essentially to the valve described in FIG. 2.
  • the actuating part 22 is provided with an internal thread 22.1, which only acts on one side, and the external thread, which also acts only on one side 17.1 of the actuating piston 17 is engaged.
  • the valve In the open position, the valve is transferred by the rotation of the drive shaft 4, while the compression spring 23 closes the passage cross section through the valve 1 as required.
  • a seal 28 is provided which touches the circular circumference of the drive shaft 4 in a sealing manner.
  • the drive shaft 4 is flattened on one side and is guided through the same recess in the actuating part 22.
  • the throttle valve (not shown) is in the closed position, as is the valve 1.
  • a sealing body rotating device can be provided.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Lift Valve (AREA)
  • Taps Or Cocks (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
EP91121309A 1991-04-08 1991-12-12 Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine Expired - Lifetime EP0507997B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91121309T ATE103671T1 (de) 1991-04-08 1991-12-12 Vorrichtung zum dosierten einspeisen fluechtiger kraftstoffbestandteile in das ansaugrohr einer brennkraftmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4111259A DE4111259C1 (enrdf_load_stackoverflow) 1991-04-08 1991-04-08
DE4111259 1991-04-08

Publications (3)

Publication Number Publication Date
EP0507997A2 EP0507997A2 (de) 1992-10-14
EP0507997A3 EP0507997A3 (en) 1992-11-25
EP0507997B1 true EP0507997B1 (de) 1994-03-30

Family

ID=6429028

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91121309A Expired - Lifetime EP0507997B1 (de) 1991-04-08 1991-12-12 Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine

Country Status (9)

Country Link
US (1) US5226397A (enrdf_load_stackoverflow)
EP (1) EP0507997B1 (enrdf_load_stackoverflow)
JP (1) JPH086648B2 (enrdf_load_stackoverflow)
AT (1) ATE103671T1 (enrdf_load_stackoverflow)
BR (1) BR9201006A (enrdf_load_stackoverflow)
CA (1) CA2065541C (enrdf_load_stackoverflow)
DE (2) DE4111259C1 (enrdf_load_stackoverflow)
ES (1) ES2051066T3 (enrdf_load_stackoverflow)
MX (1) MX9201583A (enrdf_load_stackoverflow)

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US6053472A (en) * 1998-10-16 2000-04-25 Eaton Corporation Rotary solenoid operated proportional flow control valve
DE10101412B4 (de) * 2001-01-13 2014-05-28 Pierburg Gmbh Abgasrückführeinrichtung für eine Brennkraftmaschine
US6959696B2 (en) * 2002-04-12 2005-11-01 Briggs & Stratton Corporation Internal combustion engine evaporative emission control system
DE10341335B4 (de) * 2003-09-08 2013-07-11 Continental Automotive Gmbh Anordnung mit Einspritzventil und einer Hülse als Druckübertragungsmittel
DE102004047180B4 (de) * 2004-09-29 2014-07-17 Robert Bosch Gmbh Aufladeeinrichtung mit Laststeuerung an Verbrennungskraftmaschinen
US7185640B2 (en) 2004-11-05 2007-03-06 Briggs & Stratton Corporation Integrated fuel tank and vapor containment system
JP2006153231A (ja) * 2004-12-01 2006-06-15 Denso Corp アクチュエータの製造方法
WO2006086419A1 (en) * 2005-02-07 2006-08-17 Borgwarner Inc. Exhaust throttle-egr valve module for a diesel engine
JP2006258283A (ja) * 2005-02-18 2006-09-28 Denso Corp 流体制御弁、および電磁弁
US7435289B2 (en) 2005-09-27 2008-10-14 Briggs & Stratton Corporation Integrated air cleaner and vapor containment system
US7281525B2 (en) * 2006-02-27 2007-10-16 Briggs & Stratton Corporation Filter canister family
US8661814B2 (en) * 2011-05-16 2014-03-04 Ford Global Technologies, Llc Method and system for controlling a turbocharger compressor bypass
JP5960572B2 (ja) * 2012-10-15 2016-08-02 株式会社ミクニ ガス制御弁
US10060393B2 (en) * 2013-02-11 2018-08-28 Ford Global Technologies, Llc Purge valve and fuel vapor management system
WO2019238270A1 (en) * 2018-06-11 2019-12-19 Eaton Intelligent Power Limited Evaporative emissions fuel tank venting system positioned in vapor line
DE102019220441A1 (de) * 2019-12-20 2021-06-24 Volkswagen Aktiengesellschaft Brennkraftmaschine mit Drosselventil und Tankentlüftungsventil in Form einer kombinierten Ventilvorrichtung
CN112576417A (zh) * 2020-12-09 2021-03-30 亚普汽车部件股份有限公司 一种电控阀、电控阀总成、电控燃油系统及加注控制方法

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Also Published As

Publication number Publication date
JPH05106522A (ja) 1993-04-27
DE4111259C1 (enrdf_load_stackoverflow) 1992-04-23
US5226397A (en) 1993-07-13
CA2065541C (en) 1996-11-12
CA2065541A1 (en) 1992-10-09
ES2051066T3 (es) 1994-06-01
EP0507997A2 (de) 1992-10-14
BR9201006A (pt) 1992-12-01
MX9201583A (es) 1992-10-01
EP0507997A3 (en) 1992-11-25
JPH086648B2 (ja) 1996-01-29
DE59101284D1 (de) 1994-05-05
ATE103671T1 (de) 1994-04-15

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