EP2788613A1 - Einspritzventil, insbesondere für eine brennkraftmaschine - Google Patents
Einspritzventil, insbesondere für eine brennkraftmaschineInfo
- Publication number
- EP2788613A1 EP2788613A1 EP12797869.0A EP12797869A EP2788613A1 EP 2788613 A1 EP2788613 A1 EP 2788613A1 EP 12797869 A EP12797869 A EP 12797869A EP 2788613 A1 EP2788613 A1 EP 2788613A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing element
- valve housing
- sealing
- injection valve
- inlet
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 70
- 239000007924 injection Substances 0.000 title claims abstract description 70
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 162
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 230000000694 effects Effects 0.000 description 9
- 230000007257 malfunction Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
Definitions
- Injection valve in particular for an internal combustion engine
- the invention relates to an injection valve, in particular for a
- Internal combustion engine of a motor vehicle comprising a valve housing from which an inlet port with an inlet region in one of the
- Valve housing protrudes together with a the valve housing in the circumferential direction encompassing cap formed fluid inlet chamber, wherein - seen in the radial direction - between the inlet port and the
- Connection cap a flow path is present, which is closed by means of a the inlet nozzle encompassing sealing element.
- the ingress of moisture mainly occurs when the injection valve is flooded or submerged in water or the like. This is especially the case if that
- Injection valve is installed on an underbody of the motor vehicle. In the humidification of the injection valve, a thermal shock can additionally be triggered, which further enhances the effect caused by the moisture.
- the injection valve shown in DE 10 2009 026 532 A1 has at its
- the injection valve with the features mentioned in claim 1 has the advantage that penetration of moisture between the inlet nozzle and the valve housing is effectively prevented. This is inventively achieved by the sealing element is in permanent sealing contact with the valve housing.
- the injection valve presented here becomes
- the injection valve may alternatively be used to introduce a liquid reducing agent, for example a urea-water solution, into an exhaust tract.
- the injection valve consists among other things of the valve housing, the inlet nozzle and the connection cap.
- the injection valve has a
- the injection valve may be formed, for example, as a top feed injection valve.
- the valve housing surrounds the
- Inlet nozzle in the circumferential direction preferably completely.
- the inlet nozzle is encompassed directly by the valve housing, so it is in touching contact with this.
- the valve housing is spaced in the radial direction from the inlet nozzle.
- On the inlet side of the inlet nozzle is on the valve body over, so protrudes from this with its inlet area.
- the inlet area is accordingly no longer encompassed by the valve housing. The inlet area protrudes into the
- Fluid inlet chamber into which is formed by the valve housing and / or the inlet nozzle together with the connection cap.
- Connection cap surrounds, for example, the valve housing in
- the terminal cap substantially completely covers the valve housing and the inlet port on the inlet side of the injection valve, so that the fluid inlet chamber is formed.
- the fluid is introduced, which is introduced by means of the injection valve, in particular injected, to be.
- the fluid is for example by a
- connection opening of the connection cap introduced into the fluid inlet chamber.
- the connection cap can be a separate component to which a
- connection cap can also be formed by another element, for example the internal combustion engine, which has a recess into which the injection valve or its
- Inlet nozzle is introduced together with at least a portion of the valve housing during assembly of the injection valve. If the connection cap is mentioned below, such an element is always meant analogously.
- connection cap before a flow path. Because the connection cap usually bears sealingly against the valve housing, this flow path is already at least partially closed. However, this is often not enough to do that
- the sealing element is provided in the flow path, which surrounds the inlet nozzle. It is not
- Sealing element in the radial direction either directly adjacent to the inlet port or its inlet region or be spaced therefrom, so that there is only an indirect encompassing.
- Valve housing are in permanent sealing contact.
- the injection valve is thus designed such that, for example, a different procedure during assembly of the injection valve or permissible assembly tolerances can not lead to the fact that there is no sealing contact between the sealing element and the valve housing.
- Inlet region of the inlet nozzle and the connecting cap are present, wherein the flow path is limited by these elements in the radial direction. The flow path is therefore directly from the inlet region of
- the sealing element is arranged in the axial direction such that the permanent sealing contact with the valve housing is present.
- the flow path may also be present between the valve housing and the connection cap.
- the flow path is limited here in the radial direction of the valve housing and the connection cap. He is usually due to the sealing concerns of
- connection cap on the valve housing at least partially closed.
- the sealing element should additionally be provided, which is correspondingly present in the radial direction directly between the valve housing and the connection cap.
- Sealing element engages around the inlet nozzle here only indirectly, so it is spaced in the radial direction of this, in particular by the
- Valve body Rather, it is directly on the valve body and in addition to the connection cap.
- a development of the invention provides that the sealing element is urged in the direction of the valve housing. In this way, the sealing effect between the sealing element and the valve housing can be improved.
- the urging of the sealing element takes place in particular axial direction, so that the sealing element in the axial direction on the
- Valve body is urged to a region of the
- Valve housing is pressed.
- the sealing element is urged by the inlet nozzle in the direction of the valve housing.
- Embodiment usually the sealing element is urged inwards in the radial direction, so that it enters the valve housing. This can
- connection cap consists at least partially of an elastic or resilient material which is deformed outwards in the radial direction during the assembly of the sealing element. Then it tries by its spring action in its starting position
- a development of the invention provides that at least one inclined surface is provided on the valve housing and / or the connection cap, against which the sealing element bears in a sealing manner.
- the oblique surface is to be understood as an area which, for example, is set in a relation to a radial direction around a non-zero angle. Accordingly, the oblique surface is present in relation to the longitudinal axis of the injection valve or to a straight line parallel to it, under a curvature of not equal to 90 °.
- the inclined surface is preferably oriented such that the sealing element for
- the inclined surface can be provided either on the valve housing or on the connection cap or both. If the inclined surface on the valve housing, so it represents a sealing surface of the valve housing, with which the sealing element is in permanent sealing contact.
- the oblique surface is especially at the first
- Embodiment of the injection valve provided.
- a development of the invention provides that the inclined surface of the
- Connection cap one with the sealing element in touching contact
- Support surface in the radial direction partially overlaps. If the oblique surface is provided on the connection cap, then the oblique surface engages over the support surface in the radial direction at least partially. Usually they are
- the support surface is here the above-mentioned sealing surface of the
- Valve housing is.
- the support surface is, for example, in a plane which is perpendicular to the longitudinal axis of the injection valve. However, it can also be designed as an inclined surface.
- a development of the invention provides that a radial projection of the inlet region or the connection cap has a contact surface which urges the sealing element in the direction of the valve housing.
- the sealing element can be urged by the inlet nozzle in the direction of the valve housing.
- the radial projection is provided at the inlet region, which is in particular present on its inlet side at the end and on which the contact surface is provided.
- the contact surface is in permanent contact with the sealing element and urges this in the direction of the valve housing.
- connection cap also present on the connection cap. This is the case in particular in the second embodiment explained above.
- connection cap provided contact surface can also be used to the sealing element in the axial direction of the valve housing
- the sealing element is an O-ring.
- the O-ring is a circumferentially continuous annular
- Sealing element It is inexpensive and does not have to be specially tailored to the geometry of the injector.
- the O-ring is applied during assembly of the injector to the inlet port or its inlet region and occurs after attaching the connection cap with this in
- the present as an O-ring sealing element is provided in particular in the first embodiment of the injection valve.
- a development of the invention provides that the sealing element as
- Form seal is present and has a sealing arm, with which the sealing element is supported on the contact surface.
- the molded seal is on the
- the molded seal consists of a base body from which at least one sealing arm extends in at least one direction.
- a respective sealing arm is provided in the radial direction pointing inwards and outwards.
- At least one each extends
- to improve the sealing effect can also on at least one side more than one
- Seal arm be provided.
- the sealing arm or at least one of the sealing arms is intended to come into touching contact with the contact surface, that is to say in particular the inlet region or the connection cap, and to urge the sealing element in the direction of the valve housing or at least fix it in the axial direction.
- a development of the invention provides that the sealing element additionally closes a second flow path present in the radial direction between the valve housing and the inlet connection. The second flow path is seen in the radial direction directly between the valve housing and the inlet nozzle, is thus limited by this in the radial direction. By closing this second flow path is the entry of
- a development of the invention provides that - seen in the radial direction - between the valve housing and the connection cap a second
- the second sealing element is present in particular in the first embodiment of the injection valve. However, it may also be provided in the second embodiment, wherein in this case in particular two equal in the axial direction spaced-apart sealing elements are present. With the help of the second sealing element, the sealing effect for
- sealing element and / or the second sealing element be present as a labyrinth sealing element, the at least one starting from a sealing body in the direction of
- Valve housing or the cap extending sealing finger has.
- the sealing element is formed in particular in the second embodiment as a labyrinth seal member.
- the labyrinth seal element consists of the seal base body and the at least one sealing finger.
- This sealing finger extends in the direction of the valve housing or the connection cap. He stands on the seal body, usually in the radial direction, over.
- a plurality of sealing fingers spaced apart in the axial direction are provided. In this way, the same sealing effect is achieved as with a plurality of spaced apart in the axial direction of sealing elements. Accordingly, the sealing effect of the sealing element or the second sealing element is significantly increased.
- FIG. 1 shows a longitudinal section through an injection valve for an internal combustion engine in a first embodiment
- FIG. 2 is a detail section through that known from FIG.
- FIG. 3 shows a detail section through a second embodiment variant
- FIG. 4 shows a detail section through a third embodiment variant
- FIG. 5 shows a detail section through a fourth embodiment variant
- FIG. 6 shows a detail section through a fifth embodiment variant.
- 1 shows a partially sectioned side view of an injection valve 1.
- the injection valve 1 is used for introducing a fluid, for example in a combustion chamber of an internal combustion engine, not shown here.
- the injection valve 1 has an inlet side 2 and an outlet side 3.
- the fluid is supplied to the injection valve 1 through the connection opening 4 via the fluid line.
- On the outlet side 3, the fluid can exit through an outlet opening (not shown here) when the injection valve 1 is actuated accordingly.
- the injection valve 1 is mounted in a recess 5 of a housing 6, which is assigned for example to the internal combustion engine.
- a seal 8 here in the form of an O-ring, is provided for sealing the recess 5 on the outlet side 3 of the injection valve 1 with respect to an environment 7 of the injection valve 1, a seal 8, here in the form of an O-ring, is provided.
- Injection valve 1 via an electrical connection 9, which is present here in the form of a part of a plug connection.
- the injection valve 1 has a valve housing 10 with an inlet-side end face 1 1.
- the valve housing 10 forms with a connection cap 12 a fluid inlet chamber 13.
- Fluid inlet chamber 13 is in fluid communication with port 4 and, correspondingly, with the fluid conduit. That means that through the
- connection opening 4 the fluid is introduced into the fluid inlet chamber 13.
- an inlet port 14 is provided which extends into an inlet region 15 into the fluid inlet chamber 13.
- the inlet port 14 thus projects with its inlet region 15 in the axial direction (with respect to a longitudinal axis 16 of the injection valve 1) on the inlet side 2 via the valve housing 10 or its end face 11.
- the connection cap 12 is arranged such that it completely surrounds a region of the valve housing 10 in the circumferential direction. Subsequently, it is fastened to the valve housing 10 by means of a holding element 17, which cooperates positively with both the valve housing 10 and the connection cap 12.
- a flow path 18 is now present between the inlet connection 14 or its inlet region 15 and the connection cap 12. This is closed by means of a sealing element 19.
- the sealing element 19 engages around the inlet port 14 or its inlet region 15 directly, that is in contact with it.
- the flow path 18 is bounded on one side by the inlet region 15 of the inlet nozzle 14 and on the other side by the connection cap 12 in the radial direction.
- This flow path 18 is now closed by means of the sealing element 19.
- the sealing element 19 is present for example as an O-ring.
- the sealing element 19 is not permanently in sealing contact with the valve housing 10, but only with the inlet portion 15 and the cap 12. As far as moisture from the environment 7 of the injector 1 through an opening 20 between the valve housing 10 and the Inlet port 14 arrive. This occurs in particular during a humidification or immersion of the injection valve 11. The moisture may subsequently malfunction
- the sealing element 19 is permanently urged in the direction of the valve housing 10.
- the inlet region 15 of the inlet nozzle 14 having a contact surface 21 which urges the sealing element 19 in the direction of the valve housing 10.
- the contact surface 21 projects, for example, against a radial projection which is provided on the inlet connection 14 on the inlet side.
- Valve housing 10 is formed.
- the sealing element 19 is held clamped so far between the contact surface 21 and the sealing surface 22.
- the sealing effect of Sealing element 19 can be improved by the sealing surface 22 as
- Sloping surface 23 is formed.
- the inclined surface 23 is tilted with respect to a plane perpendicular to the longitudinal axis 16, so that it is not completely in or parallel to this. Rather, the oblique surface 23 or a receiving this level includes the longitudinal axis 16 a
- Inlet nozzle 14 with respect to the valve housing 10 is arranged such that the sealing element 19 is urged in the direction of the valve housing 10
- FIG. 3 shows a second variant of the injection valve 1.
- Slanted surface 23 is present, but rather lies substantially in a plane which is perpendicular to the longitudinal axis 16. In contrast, however, is the
- the inclined surface 25 formed as an inclined surface 25.
- the inclined surface 25 is so far on the connection cap 12 before.
- the inclined surface 25 engages over the now serving as a support surface 26 sealing surface 22 in the radial direction at least partially, but is spaced in the axial direction to this. In this way, the sealing element 19 is held in the axial direction between the inclined surface 25 and the support surface 26 by clamping.
- Injector 1 is correspondingly set the sealing element 19 in the axial direction substantially. It is now in permanent sealing contact with the valve housing 10 and the sealing surface 22. In this way, the Opening 20 relative to the environment 7 of the injection valve 1 reliably sealed.
- FIG. 4 shows a further embodiment variant of the injection valve 1.
- Sealing element 19 is present here as a molded seal. It has a sealing arm 27 which, starting from a sealing base body 28, extends in the axial direction against the contact surface 21 which is now present on the connection cap 12.
- the contact surface 21 and the sealing surface 22 may be substantially parallel to each other. However, other embodiments could be provided, for example, as inclined surfaces.
- FIG. 5 shows a further embodiment variant of the injection valve, which is similar to that presented with reference to FIG. Accordingly, reference is made to the above statements.
- the sealing arm 27 is now arranged such that it is in contact with the contact surface 21, which in turn on the
- Inlet port 14 is present, for urging the sealing element in the direction of the valve housing 10 is used.
- the sealing element 19 is used.
- seal arm 27 is bent during assembly of the injection valve 1, so that it produces a spring force caused by its elastic design, which the sealing element 19 in the direction of the valve housing 10th
- Valve housing 10 achieved.
- FIG. 6 shows a fifth embodiment variant of the injection valve 1.
- Injector 1 have in common that the flow path 18 in the radial direction of the inlet portion 15 and the connection cap 12 is limited.
- a flow path 29 is only indirectly between the inlet port 14 and the connection cap 12. Rather, it is limited in the radial direction directly from the valve housing 10 and the connection cap 12. In the flow path 29 is now a sealing element 30 to
- This sealing element 30 is as well as the sealing element 19 described above in permanent sealing contact with the valve housing 10. For this purpose, it is urged by the connection cap 12 in the radial direction (with respect to the longitudinal axis 16) inwardly in the direction of the valve housing 10.
- the sealing element 30 is present as a labyrinth seal element which, starting from a sealing base body 31, has sealing fingers 32 extending.
- the sealing fingers 32 point inwards in the radial direction and project beyond the sealing base body 31.
- the sealing fingers 32 may also extend in the direction of the connection cap 12 or alternately in the direction of the two. They are in contact with the valve housing 10 for producing the permanent sealing contact.
- the sealing element 30 is preferably in the form of a second sealing element, in addition to the sealing element 19.
- the sealing element 19 may be arranged either according to the above embodiments, or, as shown in Figure 6, be spaced from the valve housing 10 in a conventional manner.
- Seal member 19 is in permanent sealing contact with the valve housing 10.
- the necessary sealing effect, which prevents penetration of moisture through the opening 20, is already achieved by means of the sealing element 30.
- only the sealing element 19 according to the figures 1 to 5 only the sealing element 30 or - particularly preferably - both the
- Sealing element 30 may be provided.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110087954 DE102011087954A1 (de) | 2011-12-08 | 2011-12-08 | Einspritzventil, insbesondere für eine Brennkraftmaschine |
PCT/EP2012/074254 WO2013083522A1 (de) | 2011-12-08 | 2012-12-03 | Einspritzventil, insbesondere für eine brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2788613A1 true EP2788613A1 (de) | 2014-10-15 |
EP2788613B1 EP2788613B1 (de) | 2018-06-20 |
Family
ID=47297241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12797869.0A Active EP2788613B1 (de) | 2011-12-08 | 2012-12-03 | Einspritzventil, insbesondere für eine brennkraftmaschine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2788613B1 (de) |
CN (1) | CN103975158B (de) |
DE (1) | DE102011087954A1 (de) |
WO (1) | WO2013083522A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9366167B2 (en) * | 2013-11-08 | 2016-06-14 | Continental Automotive Systems, Inc. | Injector water intrusion seal with blow out volume |
DE102015223440A1 (de) * | 2015-11-26 | 2017-06-01 | Robert Bosch Gmbh | Dichtelement und Kraftstoffinjektor mit einem Dichtelement |
ITUB20161107A1 (it) * | 2016-02-26 | 2017-08-26 | Bosch Gmbh Robert | Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna |
DE102017207091A1 (de) * | 2016-06-30 | 2018-01-04 | Robert Bosch Gmbh | Ventil zum Zumessen eines Fluids, Anschlussstück für ein Ventil und Brennstoffeinspritzanlage |
DE102020213354A1 (de) * | 2020-10-22 | 2022-04-28 | Robert Bosch Gesellschaft mit beschränkter Haftung | Brennstoffeinspritzventil |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3428597C2 (de) * | 1984-08-02 | 1986-11-27 | Bayerische Motoren Werke AG, 8000 München | Verbindung zweier koaxial hintereinander angeordneter Rohrabschnitte, insbesondere einer Einspritzdüse mit dem koaxial angeordneten Anschlußstutzen einer Einspritzleitung |
DE19939132A1 (de) * | 1999-08-18 | 2001-02-22 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE10056038A1 (de) * | 2000-11-11 | 2002-05-16 | Bosch Gmbh Robert | Brennstoffeinspritzanlage |
DE10106168A1 (de) * | 2001-02-10 | 2002-08-14 | Bosch Gmbh Robert | Brennstoffeinspritzventil und Verfahren zur Montage eines Brennstoffeinspritzventils in einer Ventilaufnahme |
JP2003049748A (ja) * | 2001-08-08 | 2003-02-21 | Keihin Corp | 燃料分配管への燃料噴射弁接続構造 |
US20050116056A1 (en) * | 2002-07-12 | 2005-06-02 | Waldemar Hans | Fuel injector and method for installing a fuel injector in a valve seat |
JP2005248846A (ja) * | 2004-03-04 | 2005-09-15 | Bosch Automotive Systems Corp | 燃料通路のシール構造及びそのシール構造を備えた燃料噴射弁 |
JP2005248847A (ja) * | 2004-03-04 | 2005-09-15 | Bosch Automotive Systems Corp | 燃料通路のシール構造及びそのシール構造を備えた燃料噴射弁 |
DE102009026532A1 (de) | 2009-05-28 | 2010-12-02 | Robert Bosch Gmbh | Einspritzventil für ein Fluid |
DE102011006500A1 (de) * | 2011-03-31 | 2012-10-04 | Robert Bosch Gmbh | Vorrichtung zum Zumessen eines Mediums |
-
2011
- 2011-12-08 DE DE201110087954 patent/DE102011087954A1/de not_active Withdrawn
-
2012
- 2012-12-03 EP EP12797869.0A patent/EP2788613B1/de active Active
- 2012-12-03 CN CN201280060413.8A patent/CN103975158B/zh active Active
- 2012-12-03 WO PCT/EP2012/074254 patent/WO2013083522A1/de unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2013083522A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN103975158A (zh) | 2014-08-06 |
CN103975158B (zh) | 2016-12-28 |
EP2788613B1 (de) | 2018-06-20 |
DE102011087954A1 (de) | 2013-06-13 |
WO2013083522A1 (de) | 2013-06-13 |
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