EP2082126A1 - Ventileinrichtung zum dosierten zumessen eines strömenden mediums - Google Patents
Ventileinrichtung zum dosierten zumessen eines strömenden mediumsInfo
- Publication number
- EP2082126A1 EP2082126A1 EP07803490A EP07803490A EP2082126A1 EP 2082126 A1 EP2082126 A1 EP 2082126A1 EP 07803490 A EP07803490 A EP 07803490A EP 07803490 A EP07803490 A EP 07803490A EP 2082126 A1 EP2082126 A1 EP 2082126A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- housing
- pot
- valve device
- opening
- 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
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 238000013022 venting Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 4
- 230000005284 excitation Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 241000826860 Trapezium Species 0.000 claims 1
- 238000007598 dipping method Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000000446 fuel Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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
-
- 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
- F02M2025/0845—Electromagnetic valves
Definitions
- Valve device for the metered metering of a flowing medium
- the invention is based on a valve device for the metered metering of a flowing medium, in particular of a tank venting valve for an internal combustion engine, according to the preamble of claim 1.
- a known valve device for tank ventilation in motor vehicles (DE 198 10 212 A1) has a housing with an inflow and an outflow.
- an electromagnet is arranged with an armature engaging on a closing body.
- the closing body closes when energized electromagnet a valve disposed between the inflow and outflow, surrounded by a valve seat valve and releases it with energized electromagnet continuously free by pushing through the stroke of the armature formed in the closing body fürgangsöffhung continuously over the valve opening.
- a more or less large cross section of the fürgangsöffhung is pushed over the valve opening and so set the size of the flowing into the outlet, with volatilized fuel laden air flow.
- the closing force for the closing body is applied by a leaf spring which is fastened on the one hand to the armature of the electromagnet and on the other hand to the closing body.
- the valve seat is formed on the projecting into the interior of the housing outflow.
- a likewise known tank venting valve with an electromagnet (US Pat. No. 5,727,532) has a housing with a valve inlet and a valve outlet. At the valve outlet, a valve seat body is arranged, in which a valve opening and a valve seat surrounding the valve seat are formed.
- the magnet armature of the electromagnet carries a valve member cooperating with the valve seat and is acted upon by a valve closing spring which presses the valve member onto the valve seat when the electromagnet is de-energized.
- the valve member lifts off from the valve seat, wherein the stroke of the valve member can be adjusted by the magnitude of the energization of the electromagnet.
- the valve member is formed as a shaped body which rests with an annular flange on the valve seat and protrudes with a rounded member tip through the valve opening.
- the limb tip has a tapering towards the free end, conical and an adjoining, cylindrical area, which rests in the valve opening when the valve is closed. If the solenoid is energized, the annular flange is lifted from the valve seat and medium can flow through the present between the cylindrical portion of the member tip and the edge of the valve opening annular gap. If the electromagnet is charged with an even larger exciting current, then the stroke of the
- Valve member the cylindrical portion of the limb tip emerges from the valve opening and through the valve opening passing through the conical portion of the limb tip, the width of the annular gap is continuously increased until the limb tip is completely out of the valve opening and the maximum cross section of the valve opening the flowing medium to Available.
- valve device with the features of claim 1 has the advantage that - unlike the known valve devices - the metering of the medium no longer takes place simultaneously on the sealing seat, but sealing seat and metering are spatially separated from each other and controlled by the common valve member. This allows a much more accurate and finely metered metering of the effluent via the valve outlet medium are made; because of the separate formation of valve opening and orifice a much larger stroke can be exploited to open the Zumessqueritess.
- the small amounts of purge air laden with volatilized fuel fed to the combustion process can be metered in much more accurately, which has an advantageous effect on the exhaust gas values of the internal combustion engine.
- Ventilhubver optimized characterized in that the metering orifice has a contour corresponding to the longitudinal section of a hopper, so that the metering orifice itself from an upper Rectangular area, a continuously adjoining, middle, isosceles trapezoidal area with pointing to the valve seat smaller baseline and a continuously adjoining lower rectangular area whose width is determined by the smaller baseline of the trapezoidal area.
- the contour of the orifice can be varied for different applications, so that an optimization of the metering of the flowing medium is possible without any problems.
- valve seat with enclosed valve opening and the orifice is formed in a separate, hollow cylindrical valve body, which is inserted into a housing having the valve inlet and outlet.
- the cylinder portion located downstream of the valve seat and containing the metering opening is preferably designed as a guide for the valve member.
- a coil carrier of the valve member actuating electromagnet is integrally formed on the valve body. This reduces the number of components that must be joined during assembly.
- the housing of the valve device is formed in two parts and the valve body inserted into the valve body is axially clamped during joining of the two housing parts.
- the valve seat with enclosed valve opening and the orifice and a valve member guide in the valve housing itself is formed.
- the housing made of plastic is made in two parts with a housing pot and a housing cover. To achieve a cost-effective construction of the housing pot is made in the thin-wall spraying process, wherein a thin-walled guide sleeve for the magnet armature is molded with.
- FIG. 1 shows a longitudinal section of a valve device for the metered metering of a flowing
- FIG. 3 is a plan view of a screen on the valve body in Fig. 2,
- FIG. 4 is a similar view as in Fig. 2 of a modified valve body
- FIG. 5 shows a longitudinal section of a valve device according to a further embodiment
- the valve device shown in FIG. 1 for the metered metering of a flowing medium is used by way of example in a tank ventilation system for motor vehicles in which volatilized fuel from the fuel tank is stored in an activated charcoal filter and the activated carbon filter is rinsed by sucked fresh air, the laden with volatilized fuel Purge air is supplied via the valve device in metered quantities to the combustion process of the internal combustion engine of the motor vehicle.
- a tank ventilation system is described, for example, in US Pat. No. 5,727,532.
- the valve device also called a tank venting valve when used in the mentioned tank venting system, has a two-part housing 11 which has a housing base body 12 and a housing base 12 placed on the housing base body 12 and clipped or welded thereto.
- a valve inlet 14 and a valve outlet 15 is formed, the valve inlet 14 upstream of an inlet nozzle 16 and the outlet 15 is arranged downstream of an outlet 17.
- Inlet and outlet pipe 16, 17 are integrally formed on the housing base body 12.
- a hollow cylindrical valve body 18 is inserted so that its body axis is aligned with the axes of valve inlet 14 and inlet port 16.
- the valve body 18 is inserted in a form-fitting manner with an end section 181 facing the valve inlet 14 into a recess 19 which is formed in the bottom of the housing base body 12 and coaxial with the valve inlet 14.
- an electromagnet 20 is received, which when closed Housing 11, so locked together or welded housing base body 12 and housing cap 13, between the housing cap 13 and the housing base body 12 is axially clamped.
- the electromagnet 20 has a magnet pot 21, a hollow magnet core 22 immersed centrally in the magnet pot 21 with a magnetic yoke 221 integrally formed thereon, closing the pot opening of the magnet pot 21, a coil carrier 23 concentrically surrounding the magnet core 22 with magnet or exciter coil 24 wound thereon and a magnet armature 25.
- the armature 25, which passes through a passage opening 45 in the bottom of the cup of the magnet pot 21, performs the function of a valve member 26 and is acted upon by a valve closing spring 27, which is received in the hollow magnet core 22.
- the valve member 26 may be a rigidly connected to the armature 25 separate component. In this case, the armature 25 has the function of the valve member drive.
- the magnet armature 25 can partially submerge in the hollow magnetic core 22.
- an annular ridge 28 is formed on the outer surface facing the bottom of the housing base body 12, which forms a positive receptacle for the end of the valve body 18 facing the electromagnet 20.
- valve seat 29 is formed which encloses a valve opening 14 coaxial with the valve opening 30.
- Valve seat 29 and valve member 26 cooperate to close and release the valve opening 30 and form a sealing seat when energized electromagnet 20.
- a sealing ring 31 is attached to the valve seat 29 facing the front edge of the valve member 26.
- the sealing ring 31 is pressed by the spring force of the valve closing spring 27 on the valve seat 29.
- the valve closing spring 27 is supported on the one hand on the side facing away from the sealing ring 31 back of the valve member 26 and on the other hand on an adjusting element 32, which is screwed in the hollow magnetic core 22.
- the closing force of the valve closing spring 27 can be adjusted by more or less strong screwing of the adjusting element 32 into the magnetic core 22.
- an orifice 33 is further formed downstream of the valve seat 29, in the direction to the valve outlet 15 facing cylinder wall of the valve body 18, so that the axis of the orifice 33 is aligned perpendicular to the axis of the valve opening 30.
- the metering orifice 33 is closed by the valve member 26 and the valve seat 29 when the electromagnet 20 is de-energized and the sealing seat 27 produced by the valve closing spring 27 is released when the electromagnet 20 is energized in a circumference dependent on the stroke of the valve member 26.
- the metering opening 33 containing, downstream of the valve seat 29th lying cylinder portion 182 of the valve body 18 at the same time forms a guide for the valve member 26th
- the metering 33 has a contour 34 adapted to the application, which ensures that the volume of the medium flowing through the metering opening 33 per unit of time follows a desired function of the stroke of the valve member 26.
- An example of a contour 34 is shown in FIGS. 2 and 4. However, this contour 34 can be varied as desired to obtain a desired over the stroke of the valve member 26 changing the Zumessquerrough the orifice. In the exemplary embodiment of FIGS.
- the metering opening 33 has a contour 34 similar to the circumferential edge of the longitudinal section of a hopper, so that the metering opening 33 has an upper rectangular area 35, a central, isosceles trapezoidal area 36 which adjoins it steplessly and whose smaller base line is the valve seat 29 is facing, and has a continuously adjoining the trapezoidal region 36, lower rectangular area 37, wherein the lower rectangular area 37 is the valve seat 29 closest.
- the width of the upper rectangle area 35 is determined by the larger baseline of the trapezoidal area 36 and the width of the lower rectangle area 37 by the size of the smaller baseline of the trapezoidal area 36.
- the electromagnet 20 is energized only slightly, for example, with a duty cycle of the excitation current of 10%, so despite a settling at the valve seat 29 large flow cross section in the Zumessöffhung 33 only a small passage cross-section in the lower rectangular area 37 released and thereby strongly throttled the medium flow, so that the smallest amount of medium flowing through the metering opening 33 can be metered very finely, independently of the opening cross section on the valve seat 29.
- the passage cross-section released by the orifice 33 is increasingly increased, depending on the stroke of the valve member 26, until e.g. at a duty cycle of 50% of the excitation current at the electromagnet 20, the metering opening 33 is completely released from the valve member 26.
- a screen 38 which functions as a dirt particle filter is arranged, which is fixedly connected to the valve body 18.
- Fig. 3 is the
- the screen 38 may be welded, for example, to the front end of the valve body 18 immersed in the recess 19 in the housing base body 12.
- the modified valve body 18 'shown in FIG. 4 differs from the valve body 18 described with reference to FIG. 2 only in that the coil carrier 23 of the electromagnet 20 is integrally formed integrally with the valve body 18'.
- the molded-on magnetic cup 28 annular ridge 28 in Fig. 1 so that on the one hand cheaper the production of the magnetic pot 21 and on the other hand, the assembly of the valve device by eliminating the separate coil carrier 23 is simplified.
- valve device differs from the embodiment described above only in that has been dispensed with a separate, to be used in the housing 39 valve body 18 and valve seat 29 with enclosed valve opening 30 and orifice 33 in the housing 39 itself are formed.
- a guide for the armature 25 is provided with valve member 26 in the housing 39, which extends in the form of a very thin-walled guide sleeve 40 in the hollow magnetic core 22 in part.
- the wall thickness of the guide sleeve 40 is dimensioned between 0.2 to 0.3 mm in order to keep the required magnetic force for the armature actuation and thus the size of the electromagnet 20 small.
- the housing 39 made of plastic is in turn designed in two parts and has a housing pot 41 and the opening of the housing pot 41 final housing cover 42.
- the housing pot 41 has two graduated in diameter pot sections 411, 412. In the larger diameter pot portion 411 of the solenoid 20 is received and formed in the smaller diameter pot portion 412 of the valve seat 29 with valve opening 30 and the metering orifice 33 in the manner described above. At the smaller diameter pot portion 412 coaxial with the valve seat 29 of the inlet nozzle 16 and coaxially with the orifice 33 of the outlet 17 is formed.
- the pot wall of the smaller diameter pot portion 412 forms a lower part of the guide for the armature 25, which in turn acts as a valve member 26 which is pressed in the closed state of the valve means under the action of the valve closing spring 27 with the sealing ring 31 on the valve seat 29.
- the guide sleeve 40 which forms the upper part of the magnetic armature guide, is formed in one piece on the transition shoulder between the larger diameter and smaller diameter pot portion 411, 412 in alignment with the cylinder wall of the smaller diameter pot portion 412.
- the housing pot 41 is manufactured by means of thin-wall spraying. The thin wall spraying is used to make the thin-walled guide sleeve 40 with the housing pot 41 in one piece.
- the thin-walledness of the guide sleeve 40 is required so that a relatively small magnetic force is sufficient for actuating the armature and thus the electromagnet 20 can be kept small in size.
- the holder for the adjusting element 32 for adjusting the spring force of the valve closing spring 27 is an integrally formed on the housing cover 42, hollow pin 43 which projects into the central magnetic core 22. In the end wall of the hollow pin 43, a screw thread 44 is introduced, in which the adjusting element 32 can be screwed with an external thread.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Measuring Volume Flow (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006049877A DE102006049877A1 (de) | 2006-10-23 | 2006-10-23 | Ventileinrichtung zum dosierten Zumessen eines strömenden Mediums |
| PCT/EP2007/059687 WO2008049696A1 (de) | 2006-10-23 | 2007-09-14 | Ventileinrichtung zum dosierten zumessen eines strömenden mediums |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2082126A1 true EP2082126A1 (de) | 2009-07-29 |
| EP2082126B1 EP2082126B1 (de) | 2010-12-08 |
Family
ID=38740490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07803490A Not-in-force EP2082126B1 (de) | 2006-10-23 | 2007-09-14 | Ventileinrichtung zum dosierten zumessen eines strömenden mediums |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2082126B1 (de) |
| AT (1) | ATE491090T1 (de) |
| DE (2) | DE102006049877A1 (de) |
| WO (1) | WO2008049696A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996036806A2 (en) | 1995-05-19 | 1996-11-21 | Siemens Electric Limited | Canister purge system having improved purge valve control |
| US5579741A (en) * | 1995-11-30 | 1996-12-03 | Siemens Electric Limited | Vapor purge valve having tapered bead armature seal |
| US5970958A (en) * | 1997-10-10 | 1999-10-26 | Eaton Corporation | Fuel vapor purge control |
| DE19810212A1 (de) | 1998-03-10 | 1999-09-16 | Bosch Gmbh Robert | Ventileinrichtung |
-
2006
- 2006-10-23 DE DE102006049877A patent/DE102006049877A1/de not_active Withdrawn
-
2007
- 2007-09-14 AT AT07803490T patent/ATE491090T1/de active
- 2007-09-14 EP EP07803490A patent/EP2082126B1/de not_active Not-in-force
- 2007-09-14 DE DE502007005916T patent/DE502007005916D1/de active Active
- 2007-09-14 WO PCT/EP2007/059687 patent/WO2008049696A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008049696A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE491090T1 (de) | 2010-12-15 |
| DE102006049877A1 (de) | 2008-04-24 |
| WO2008049696A1 (de) | 2008-05-02 |
| DE502007005916D1 (de) | 2011-01-20 |
| EP2082126B1 (de) | 2010-12-08 |
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