DE102010039052A1 - Ice-pressurized injection device for internal combustion engine i.e. diesel engine, has rigid valve sleeve, and compensation space that is limited by sleeve on one side and by compensation element on another side - Google Patents
Ice-pressurized injection device for internal combustion engine i.e. diesel engine, has rigid valve sleeve, and compensation space that is limited by sleeve on one side and by compensation element on another side Download PDFInfo
- Publication number
- DE102010039052A1 DE102010039052A1 DE102010039052A DE102010039052A DE102010039052A1 DE 102010039052 A1 DE102010039052 A1 DE 102010039052A1 DE 102010039052 A DE102010039052 A DE 102010039052A DE 102010039052 A DE102010039052 A DE 102010039052A DE 102010039052 A1 DE102010039052 A1 DE 102010039052A1
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- Germany
- Prior art keywords
- sleeve
- space
- injection device
- compensation
- compensation element
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1486—Means to prevent the substance from freezing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
Description
Stand der Technik:State of the art:
Die Erfindung betrifft eine eisdruckfeste Einspritzvorrichtung für ein Fluid, die auch durch gefrierendes und sich im Volumen ausdehnendes Fluid nicht beschädigt wird.The invention relates to an ice-pressure-resistant injection device for a fluid, which is not damaged by freezing and expanding in the volume of fluid.
Es ist bekannt, den Abgasen eines Verbrennungsmotors, insbesondere eines Dieselmotors, ein Fluid, wie z. B. eine wässrige Harnstofflösung, beizufügen, um in den Abgasen vorhandene Schadstoffe, insbesondere Stickoxide, zu reduzieren. Wässrige Harnstofflösung gefriert bei niedrigen Umgebungstemperaturen und der Gefrierpunkt kann durch die Zugabe von Additiven nur in einem begrenzten Bereich abgesenkt werden, ohne die Wirksamkeit der Harnstofflösung bei der Abgasnachbehandlung negativ zu beeinflussen.It is known that the exhaust gases of an internal combustion engine, in particular a diesel engine, a fluid such. As an aqueous urea solution, to be added to reduce existing pollutants in the exhaust gases, especially nitrogen oxides. Aqueous urea solution freezes at low ambient temperatures and the freezing point can only be lowered within a limited range by the addition of additives without adversely affecting the effectiveness of the urea solution in the exhaust aftertreatment.
Einfrierendes Fluid dehnt sich aus und diese Volumenausdehnung kann zur Zerstörung von Komponenten des Einspritzsystems, insbesondere der Einspritzvorrichtung führen. Daher wird das Fluid üblicherweise nach dem Abschalten des Verbrennungsmotors aus dem Einspritzsystem zurück in den Tank gesaugt. Dieses Verfahren funktioniert jedoch nicht, wenn der Verbrennungsmotor bzw. das Einspritzsystem in einem Notfall durch einen Notaus-Schalter abgeschaltet wird, da mit der Betätigung des Notaus-Schalters alle Komponenten des System sofort stillgelegt werden. Friert das System nach einer Betätigung des Notaus-Schalters ein, so kann es durch die Volumenausdehnung gefrierenden Fluids zu einer Beschädigung des Einspritzsystems und insbesondere der Einspritzvorrichtung kommen.Freezing fluid expands and this volumetric expansion can lead to the destruction of components of the injection system, in particular the injection device. Therefore, the fluid is usually sucked from the injection system back into the tank after switching off the internal combustion engine. However, this method does not work if the internal combustion engine or the injection system is switched off in an emergency by an emergency stop switch, since the operation of the emergency stop switch all components of the system immediately shut down. If the system freezes after an actuation of the emergency stop switch, the volume expansion of freezing fluid can damage the injection system and in particular the injection device.
Offenbarung der Erfindung:Disclosure of the invention:
Es ist eine Aufgabe der Erfindung, eine eisdruckfeste Einspritzvorrichtung bereit zu stellen.It is an object of the invention to provide an ice pressure resistant injection device.
Eine erfindungsgemäße Einspritzvorrichtung hat eine bewegliche Ventilnadel, eine steife, d. h. durch den Druck gefrierenden Fluids im Wesentlichen nicht verformbare, Ventilhülse, welche die Ventilnadel in radialer Richtung derart umgibt, das zwischen der Ventilnadel und der Ventilhülse ein Ventilnadelraum ausgebildet ist. Ein Kompensationselement ist derart im Ventilnadelraum angeordnet, dass es den Ventilnadelraum in einen Einspritzraum und in einen Kompensationsraum, der von der Ventilhülse und dem Kompensationselement begrenzt wird, unterteilt. Der Einspritzraum ist im Betrieb mit einzuspritzendem Fluid gefüllt. Der Kompensationsraum enthält ein Gasvolumen und ist durch das Kompensationselement derart von dem Einspritzraum getrennt, das kein Gas- oder Fluidfluss zwischen dem Einspritzraum und dem Kompensationsraum möglich ist. Wenigstens ein Bereich des Kompensationselements ist flexibel ausgebildet und geeignet, durch elastisches Verformen eine Volumenzunahme gefrierenden Fluids im Einspritzraum auszugleichen und so eine Beschädigung der Einspritzvorrichtung durch die Volumenzunahme gefrierenden Fluids zu verhindern.An injection device according to the invention has a movable valve needle, a rigid, d. H. by the pressure-freezing fluid substantially non-deformable, valve sleeve, which surrounds the valve needle in the radial direction such that between the valve needle and the valve sleeve, a valve needle space is formed. A compensation element is arranged in the valve needle space such that it subdivides the valve needle space into an injection space and into a compensation space bounded by the valve sleeve and the compensation element. The injection space is filled with fluid to be injected during operation. The compensation space contains a gas volume and is separated from the injection space by the compensation element in such a way that no gas or fluid flow between the injection space and the compensation space is possible. At least one area of the compensation element is designed to be flexible and suitable for compensating an increase in volume of freezing fluid in the injection space by elastic deformation and thus preventing damage to the injection device as a result of the volume increase of freezing fluid.
In einer Ausführungsform ist der Einspritzraum innerhalb des Kompensationsraumes angeordnet und das Kompensationselement umgibt den Einspritzraum. Insbesondere sind der Einspritzraum und der Kompensationsraum zylinderförmig ausgebildet und der Kompensationsraum ist in radialer Richtung um den Einspritzraum angeordnet, der seinerseits die Ventilnadel umgibt.In one embodiment, the injection space is disposed within the compensation space and the compensation element surrounds the injection space. In particular, the injection space and the compensation space are cylindrical and the compensation space is arranged in the radial direction about the injection space, which in turn surrounds the valve needle.
In einer Ausführungsform ist das Kompensationselement als Hülse ausgebildet, welche um die Ventilnadel angeordnet ist. Die Hülse kann insbesondere koaxial um die Ventilnadel angeordnet sein. Eine solche Hülse ist besonders einfach herstellbar und montierbar und gut geeignet, die Volumenzunahme gefrierenden Fluids auszugleichen.In one embodiment, the compensation element is designed as a sleeve, which is arranged around the valve needle. The sleeve may in particular be arranged coaxially around the valve needle. Such a sleeve is particularly easy to manufacture and assemble and well suited to compensate for the increase in volume of freezing fluid.
In einer Ausführungsform ist wenigstens ein Bereich des Kompensationselements als Faltenbalg ausgebildet. Ein als Faltenbalg ausgebildeter Bereich stellt einen flexiblen Bereich zur Verfügung, der besonders gut geeignet ist, um eine Volumenzunahme gefrierenden Fluids auszugleichen.In one embodiment, at least a portion of the compensation element is designed as a bellows. A bellows-shaped region provides a flexible region which is particularly well suited to compensate for an increase in the volume of freezing fluid.
In einer Ausführungsform ist das Kompensationselement derart gasdicht mit der Ventilhülse verbunden, dass durch eine solche gasdichte Verbindung zwischen dem Kompensationselement und der Ventilhülse ein gasdicht abgeschlossener Kompensationsraum ausgebildet ist, der beim Einfrieren des Fluids das zusätzliche Volumen des sich ausdehnenden Fluids aufnimmt.In one embodiment, the compensation element is connected in such a gastight manner to the valve sleeve that a gas-tight compensation space is formed by such a gas-tight connection between the compensation element and the valve sleeve, which receives the additional volume of the expanding fluid during freezing of the fluid.
In einer Ausführungsform ist das Kompensationselement mit der Ventilhülse verschweißt. Durch Verschweißen lässt sich eine gasdichte Verbindung zwischen dem Kompensationselement und der Ventilhülse gut und zuverlässig herstellen.In one embodiment, the compensation element is welded to the valve sleeve. By welding, a gas-tight connection between the compensation element and the valve sleeve can be produced well and reliably.
In einer Ausführungsform hat das Kompensationselement wenigstens einen Bereich mit einer Wandstärke von 0,1 mm bis 0,5 mm, insbesondere von 0,3 mm. Eine Wandstärke in diesem Bereich ist besonders geeignet, um eine gut haltbare Schweißverbindung zwischen dem Kompensationselement und der Ventilhülse herzustellen. In one embodiment, the compensation element has at least one region with a wall thickness of 0.1 mm to 0.5 mm, in particular of 0.3 mm. A wall thickness in this area is particularly suitable for producing a well-lasting welded connection between the compensation element and the valve sleeve.
In einer Ausführungsform hat das Kompensationselement wenigstens einen Bereich mit einer Wandstärke von 0,05 mm bis 0,10 mm, insbesondere 0,08 mm. Eine Wandstärke in diesem Bereich ermöglicht eine gute Flexibilität des Kompensationselements und stellt gleichzeitig ein Kompensationselement bereit, das die notwendige Stabilität aufweist, um die bei der Volumenausdehnung gefrierenden Fluids entstehenden Kräfte aufzunehmen.In one embodiment, the compensation element has at least one region with a wall thickness of 0.05 mm to 0.10 mm, in particular 0.08 mm. A wall thickness in this area allows a good flexibility of the compensation element and at the same time provides a compensation element which has the necessary stability to absorb the forces resulting from the expansion of the volume of freezing fluid.
In einer Ausführungsform hat die Einspritzvorrichtung eine Einstellhülse, die durch Schweißen, insbesondere Punktschweißen, an einem Gehäuse der Einspritzvorrichtung befestigt ist. Eine am Gehäuse der Einspritzvorrichtung befestigte Einstellhülse kann die durch eine Volumenausdehnung des Fluids erzeugten Kräfte gut aufnehmen.In one embodiment, the injection device has an adjustment sleeve, which is attached by welding, in particular spot welding, to a housing of the injection device. A mounted on the housing of the injector adjusting sleeve can absorb the forces generated by a volume expansion of the fluid well.
In einer Ausführungsform ist in einem Zulauf der Einspritzvorrichtung wenigstens ein Filterelement angeordnet, welches nahezu das gesamte Volumen des Zulaufs ausfüllt. Durch das Volumen des Filterelements wird die Fluidmenge, die sich im Betrieb im Zulauf befindet, verkleinert und die absolute Volumenausdehnung im Falle des Einfrierens des Fluids wird soweit reduziert, dass der Eisdruck einfrierenden Fluids nicht zu einer Beschädigung der Einspritzvorrichtung führt.In one embodiment, at least one filter element is arranged in an inlet of the injection device, which fills almost the entire volume of the inlet. By the volume of the filter element, the amount of fluid that is in operation in the feed, reduced and the absolute volume expansion in the case of freezing of the fluid is reduced to such an extent that the ice pressure of freezing fluid does not lead to damage to the injector.
In einer Ausführungsform ist das Filterelement mit Hilfe einer Tülle, die an dem Zulauf der Einspritzvorrichtung befestigt ist, in der Einspritzvorrichtung fixiert. Durch eine an der Einspritzvorrichtung fixierte, insbesondere angeschweißte Tülle ist der gewünschte Hub der Ventilnadel gut und einfach einstellbar.In one embodiment, the filter element is fixed in the injector by means of a grommet attached to the inlet of the injector. By a fixed to the injection device, in particular welded spout of the desired stroke of the valve needle is well and easily adjustable.
Die Erfindung wird im Folgenden anhand der beigefügten Figuren näher erläutert. Dabei zeigt:The invention will be explained in more detail below with reference to the attached figures. Showing:
An ihrem in der
Die Einspritzöffnung
Die Ventilhülse
Innerhalb des Gehäuses
Im in der
Die Einstellhülse
Auf der von der Ventilnadel
Um das von der Einspritzöffnung
Im Ventilnadelraum
Zwischen dem Kompensationselement
Dehnt sich im Einspritzraum
In einem in Richtung der Längsachse A mittleren Bereich
Die gezeigte Ausbildung des mittleren Bereichs
Das Material des Kompensationselements
Der einspritzseitige, in den
Anders als in dem in der
Das Dichtelement
Dadurch, dass die Verbindung, mit der die Einstelltülle
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102008042987 A1 [0004] DE 102008042987 A1 [0004]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102010039052A DE102010039052A1 (en) | 2010-08-09 | 2010-08-09 | Ice-pressurized injection device for internal combustion engine i.e. diesel engine, has rigid valve sleeve, and compensation space that is limited by sleeve on one side and by compensation element on another side |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010039052A DE102010039052A1 (en) | 2010-08-09 | 2010-08-09 | Ice-pressurized injection device for internal combustion engine i.e. diesel engine, has rigid valve sleeve, and compensation space that is limited by sleeve on one side and by compensation element on another side |
Publications (1)
Publication Number | Publication Date |
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DE102010039052A1 true DE102010039052A1 (en) | 2012-02-09 |
Family
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DE102010039052A Withdrawn DE102010039052A1 (en) | 2010-08-09 | 2010-08-09 | Ice-pressurized injection device for internal combustion engine i.e. diesel engine, has rigid valve sleeve, and compensation space that is limited by sleeve on one side and by compensation element on another side |
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DE (1) | DE102010039052A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013141780A1 (en) * | 2012-03-20 | 2013-09-26 | Scania Cv Ab | Method pertaining to an scr system and an scr system |
US8549840B2 (en) | 2010-11-12 | 2013-10-08 | Cummins Cal Pacific, Llc | Fluid injector |
EP2647828A1 (en) * | 2012-04-06 | 2013-10-09 | Cummins Cal Pacific, LLC | Fluid injector |
DE102012108942A1 (en) * | 2012-09-21 | 2014-03-27 | Emitec France S.A.S | Feed unit for a liquid additive |
DE102015217673A1 (en) * | 2015-09-15 | 2017-03-16 | Continental Automotive Gmbh | Injection device for metering a fluid and motor vehicle with such an injection device |
US20180023438A1 (en) * | 2016-07-21 | 2018-01-25 | Continental Automotive Systems, Inc. | Diesel exhuast fluid injector calibration freeze protection insert |
DE102017209913A1 (en) | 2017-06-13 | 2018-12-13 | Robert Bosch Gmbh | Injection valve for aqueous solutions |
EP3521581A1 (en) * | 2018-02-01 | 2019-08-07 | Continental Powertrain USA, LLC | Injector for reductant delivery unit having fluid volume reduction assembly |
EP3611413A1 (en) * | 2018-08-17 | 2020-02-19 | Thomas Magnete GmbH | Valve with ice pressure compensation |
EP3611412A1 (en) * | 2018-08-17 | 2020-02-19 | Thomas Magnete GmbH | Valve with protective device |
US10947880B2 (en) | 2018-02-01 | 2021-03-16 | Continental Powertrain USA, LLC | Injector for reductant delivery unit having fluid volume reduction assembly |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008042987A1 (en) | 2008-10-21 | 2010-04-22 | Robert Bosch Gmbh | Dosing device for use in exhaust gas duct of e.g. diesel engine of passenger car, has valve stem with opening e.g. rectangular running slot, for discharging liquid into gap, where gap is limited by compressible wall |
-
2010
- 2010-08-09 DE DE102010039052A patent/DE102010039052A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008042987A1 (en) | 2008-10-21 | 2010-04-22 | Robert Bosch Gmbh | Dosing device for use in exhaust gas duct of e.g. diesel engine of passenger car, has valve stem with opening e.g. rectangular running slot, for discharging liquid into gap, where gap is limited by compressible wall |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8549840B2 (en) | 2010-11-12 | 2013-10-08 | Cummins Cal Pacific, Llc | Fluid injector |
WO2013141780A1 (en) * | 2012-03-20 | 2013-09-26 | Scania Cv Ab | Method pertaining to an scr system and an scr system |
EP2647828A1 (en) * | 2012-04-06 | 2013-10-09 | Cummins Cal Pacific, LLC | Fluid injector |
DE102012108942A1 (en) * | 2012-09-21 | 2014-03-27 | Emitec France S.A.S | Feed unit for a liquid additive |
US10975821B2 (en) * | 2015-09-15 | 2021-04-13 | Vitesco Technologies GmbH | Injection device for metering a fluid and motor vehicle having such an injection device |
DE102015217673A1 (en) * | 2015-09-15 | 2017-03-16 | Continental Automotive Gmbh | Injection device for metering a fluid and motor vehicle with such an injection device |
US20180202404A1 (en) * | 2015-09-15 | 2018-07-19 | Continental Automotive Gmbh | Injection device for metering a fluid and motor vehicle having such an injection device |
US20180023438A1 (en) * | 2016-07-21 | 2018-01-25 | Continental Automotive Systems, Inc. | Diesel exhuast fluid injector calibration freeze protection insert |
WO2018017462A1 (en) * | 2016-07-21 | 2018-01-25 | Continental Automotive Systems, Inc. | Diesel exhuast fluid injector calibration freeze protection insert |
US10227906B2 (en) * | 2016-07-21 | 2019-03-12 | Continental Powertrain USA, LLC | Diesel exhaust fluid injector calibration freeze protection insert |
DE102017209913A1 (en) | 2017-06-13 | 2018-12-13 | Robert Bosch Gmbh | Injection valve for aqueous solutions |
US10947880B2 (en) | 2018-02-01 | 2021-03-16 | Continental Powertrain USA, LLC | Injector for reductant delivery unit having fluid volume reduction assembly |
EP3521581A1 (en) * | 2018-02-01 | 2019-08-07 | Continental Powertrain USA, LLC | Injector for reductant delivery unit having fluid volume reduction assembly |
US11041421B2 (en) | 2018-02-01 | 2021-06-22 | Continental Powertrain USA, LLC | Injector for reductant delivery unit having fluid volume reduction assembly |
EP3611413A1 (en) * | 2018-08-17 | 2020-02-19 | Thomas Magnete GmbH | Valve with ice pressure compensation |
EP3611412A1 (en) * | 2018-08-17 | 2020-02-19 | Thomas Magnete GmbH | Valve with protective device |
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