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

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Publication number
DE102010039052A1
DE102010039052A1 DE201010039052 DE102010039052A DE102010039052A1 DE 102010039052 A1 DE102010039052 A1 DE 102010039052A1 DE 201010039052 DE201010039052 DE 201010039052 DE 102010039052 A DE102010039052 A DE 102010039052A DE 102010039052 A1 DE102010039052 A1 DE 102010039052A1
Authority
DE
Germany
Prior art keywords
space
sleeve
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.)
Withdrawn
Application number
DE201010039052
Other languages
German (de)
Inventor
Tobias Heiter
Ulrich Meingast
Godehard Nentwig
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE201010039052 priority Critical patent/DE102010039052A1/en
Publication of DE102010039052A1 publication Critical patent/DE102010039052A1/en
Application status is Withdrawn legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/18Exhaust 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
    • F01N3/20Exhaust 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
    • F01N3/2066Selective catalytic reduction [SCR]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/10Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/02Adding substances to exhaust gases the substance being ammonia or urea
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/14Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/14Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1486Means to prevent the substance from freezing
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/20Exhaust after-treatment
    • Y02T10/24Selective Catalytic Reactors for reduction in oxygen rich atmosphere

Abstract

The device (2) has a valve needle (18), and a rigid valve sleeve (21) surrounding the needle such that a valve needle space is formed between the needle and the valve sleeve. A compensation element (24) provided with a flexible region is arranged in the needle space. The needle space is arranged in an injection space (22) that is filled with a liquid i.e. aqueous urea solution, during operation. A compensation space (23) is filled with gas. The compensation space is limited by the sleeve on one side and by the compensation element on another side. A gas tight connection is provided between the compensation element and the sleeve by welding.

Description

  • State of the art:
  • 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.
  • 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.
  • 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.
  • DE 10 2008 042 987 A1 describes a metering device for introducing liquids into an outlet space. The metering device comprises a nozzle which opens out into the outlet space, furthermore a metering unit with a metering valve. The metering valve comprises a valve stem which is guided to form a gap in the valve body of the metering unit. The valve stem includes at least one opening that allows fluid to escape into the gap. The space is bounded by a flexible wall.
  • Disclosure of the invention:
  • It is an object of the invention to provide an ice pressure resistant injection device.
  • 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 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 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 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 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 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 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 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 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 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 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.
  • The invention will be explained in more detail below with reference to the attached figures. Showing:
  • 1 a section through a first embodiment of an injection device according to the invention;
  • 2 a schematic sectional view of a compensation element according to the invention; and
  • 3 a section through a second embodiment of an injection device according to the invention.
  • 1 shows a sectional view through a first embodiment of an injection device according to the invention.
  • At her in the 1 bottom end has the injector 2 a valve seat 20 with an injection opening 19 on, by the injected fluid from the injector 2 z. B. in an exhaust line, not shown, of an internal combustion engine can be injected.
  • The injection opening 19 is through a spherical valve body 18a at one end face of a substantially cylindrical valve needle 18 is attached, lockable. The valve needle 18 is via a compression spring 6 attached to that of the valve body 18 opposite end of the valve needle 18 is arranged so elastically on an adjusting sleeve 14 supported that the valve needle 18 parallel to its longitudinal axis between a closure position in which the valve body 18a the injection port 19 closes, and an open position in which the valve body 18a the injection port 19 releases, is movable. In the area above the valve seat 20 is the valve needle 18 such from a cylindrical valve sleeve 21 Surround that between the valve sleeve 21 and the valve needle 18 a valve needle room 22 . 23 is trained.
  • The valve sleeve 21 extends at its from the injection port 19 turned away end in a housing 4 in which they pass through one onto an area of the housing 4 screwed grommet 2 which covers an area of the housing 4 in the radial direction against the valve sleeve 21 presses, is fixed.
  • Inside the case 4 is about that of the valve seat 20 opposite end of the valve needle 18 , the compression spring 6 and the adjusting sleeve 14 a coil 12 with an iron core 13 arranged. The sink 12 and the iron core 13 are designed such that by energizing the coil 12 a magnetic field is generated, which the valve needle 18 against the force of the compression spring 6 moved from the closure position to an open position in which the valve body 18a the injection port 19 releases.
  • I'm in the 1 The area shown on the top left is a plug-in connection 36 with at least one electrical contact 34 shown over in the 1 not shown electrical connecting lines so with the coil 12 connected is that the coil 12 by applying an electrical voltage to the electrical contact 34 from the outside can be energized to the valve needle 18 to move and initiate an injection process.
  • The adjusting sleeve 14 is at her from the valve needle 18 opposite end to a sealing element 26 supported, which z. B. by Welding, in particular by spot welding, to the surrounding housing 4 is fixed. Because of the adjustment sleeve 14 on the surrounding case 4 is fixed, it is not possible that freezing and expanding fluid, the sealing element 26 shifts and so increasing by the volume expansion freezing fluid fluid pressure from the valve needle chamber 22 . 23 in an inlet area 32 the injector 2 above the adjusting sleeve 14 transfers. In particular, it prevents the injection device 2 and in particular the stroke of the valve needle 18 by moving the sealing element 26 and / or the adjusting sleeve 14 be misaligned.
  • On the from the valve needle 18 opposite side of the sealing element 26 is in an inlet area 32 the injector 2 a z. B. ceramic or metal formed filter element 28 arranged. The filter element 28 filters fluid, which is the injector 2 in operation by a in the 1 not shown supply line in the inlet area 32 is supplied. The filtering of the fluid prevents dirt and / or debris from entering the injector 2 clog and so affect their function and / or the injection device 2 into the injection space 22 reach. In addition, the filter element limits 28 the amount of fluid in operation in the inlet area 32 the injector 2 is present and thus reduces the absolute value of the volume expansion during freezing of the fluid. The risk of damage to the injector 2 by freezing fluid in the inlet area 32 is reduced.
  • To that from the injection opening 19 at the valve seat 20 opposite upper end of the inlet area 32 the injector 2 is a sealing element 30 , the Z. B. is designed as an O-ring, arranged, which is the connection of the injection device 2 seals fluid-tight with the supply line, not shown.
  • In the valve needle room 22 . 23 is in the radial direction between the valve needle 18 and the valve needle 18 surrounding valve sleeve 21 an elastic compensation element 24 arranged, which the valve needle space 22 . 23 in the radial direction into an inner injection space 22 and an external compensation space 23 divided. The compensation element 24 is in the in the 1 shown embodiment in the form of a portion of the valve needle 18 arranged Kompensationshülse 24 formed at both ends 24a . 24c with the surrounding valve sleeve 21 is welded gas-tight.
  • Between the compensation element 24 and the compensation element 24 and the valve needle 18 surrounding valve sleeve 21 is in the form of the compensation room 23 a gas-tight compensating volume is formed, which is suitable, a volume expansion of freezing fluid, which is in the injection space 22 between the valve needle 18 and the compensation element 24 is to balance.
  • Expands in the injection room 22 existing fluid during freezing deforms in particular a middle, elastically formed area 24b of the compensation element 24 in the radial direction to the outside and thus increases in the area around the valve needle 18 for the freezing fluid available volume of the injection space 22 , where the volume of the compensation space 23 reduced accordingly. The increased volume of fluid thus becomes by deforming the compensation element 24 and a corresponding reduction in the volume of the compensation space 23 recorded without the fluid pressure within the injection chamber 22 significantly increased. Damage to the injector 2 by the volume increase freezing fluid is prevented.
  • 2 schematically shows an enlarged sectional view of an embodiment of a compensation element according to the invention 24 , The compensation element 24 is as about a longitudinal axis A rotationally symmetrical sleeve 24 with two cylindrical end portions 24a . 24c educated. In the area of the cylindrical end areas 24a . 24c has the sleeve 24 a wall thickness d1 of 0.1 mm to 0.5 mm, in particular a wall thickness of 0.3 mm. A wall thickness in this interval is particularly well suited to the compensation element 24 by welding securely to the surrounding valve sleeve 21 the injector 2 to fix.
  • In a central region in the direction of the longitudinal axis A. 24b is the compensation element 24 formed in the form of a bellows, wherein the compensation element 24 in this middle area 24b has a wall thickness d2 of 0.05 mm to 0.10 mm, in particular of 0.08 mm. By a wall thickness in this interval and the formation as a bellows is the middle range 24b in particular in the radial direction, ie at a right angle to the longitudinal axis A of the compensation element 24 , elastically well deformable and can increase the volume of freezing fluid in the injection space 22 balance well.
  • The illustrated embodiment of the middle section 24b of the compensation element 24 as a bellows is only an example and not mandatory to the inventive function of the compensation element 24 to realize. The desired function, for example, by a smooth sleeve can be achieved whose wall is in a central area 24b between the end areas 24a and 24c is formed sufficiently elastic.
  • The material of the compensation element 24 is to be chosen so that it has both the desired elasticity and a good fatigue strength. Is the injector 2 . 3 provided for mounting on a hot exhaust line in operation, so must the material for the compensation element 24 also have the necessary temperature resistance. Sheet metal has proven to be a particularly suitable material for the production of the compensation element 24 proved, as it has a high temperature resistance and the elasticity of the compensation element 24 by the choice of the thickness of the sheet is well adjusted to a desired value.
  • 3 shows a second embodiment of an injection device according to the invention 3 ,
  • The injection side, in the 1 and 3 The range of injectors shown below 2 . 3 is identical in both embodiments and will therefore not be described again.
  • Unlike the one in the 1 shown first embodiment 2 is the adjustment 14 in the second embodiment 3 not on a sealing element 26 supported, which on the housing 4 is fixed. Rather, the adjusting sleeve is supported 14 directly on a filter element 28 which upstream (in the in the 3 shown above) of the adjusting sleeve 14 in the inlet area 32 the injector 3 is introduced. The filter element 28 has in this case against deformation in its longitudinal direction sufficient stability to forces caused by the compression spring 6 and possibly additionally by a volume expansion of freezing fluid on the adjusting sleeve 14 be exercised without being materially deformed.
  • The sealing element 28 is at its upstream end, which is in the 3 is shown above, on a Einstellülle 38 supported in the inlet area 32 the injector 3 introduced and, for. B. by a welded joint, is securely fixed in the desired position. Due to the position of the adjustment sleeve 38 and the length of the filter element 28 becomes the position of the adjustment sleeve 14 established. The stroke of the valve needle 18 so can by selecting the length of the filter element 28 and the position of the adjustment sleeve 38 be set to a desired value.
  • Because of the connection with which the adjustment spout 38 at the inlet area 32 is fixed, not as in the first embodiment in a central region of the injection device 2 but at an end portion of the injector 3 is formed, the assembly of an injection device according to the invention is facilitated, since the connection between the Einstellülle 38 and the inlet area 32 , z. B. by welding, at the more accessible end of the inlet area 32 the injector 2 . 3 can be made easier than at a hard to reach middle portion of the injector 2 . 3 ,
  • QUOTES INCLUDE IN THE DESCRIPTION
  • 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.
  • Cited patent literature
    • DE 102008042987 A1 [0004]

Claims (10)

  1. Injection device ( 2 . 3 ) with a valve needle ( 18 ), a stiff valve sleeve ( 21 ), which the valve needle ( 18 ) surrounds that between the valve needle ( 18 ) and the valve sleeve ( 21 ) a valve needle space ( 22 . 23 ) is formed, and a compensation element ( 24 ), which has at least one flexible area and which in the valve needle space ( 22 . 23 ) is arranged that it the valve needle space ( 22 . 23 ) into an injection space ( 22 ), which is filled with fluid during operation, and a gas-filled compensation space ( 23 ), the compensation space ( 23 ) on the one hand by the valve sleeve ( 21 ) and on the other hand of the compensation element ( 24 ) is limited.
  2. Injection device ( 2 . 3 ) according to claim 1, wherein the injection space ( 22 ) within the compensation space ( 23 ) is trained.
  3. Injection device ( 2 . 3 ) according to claim 1 or 2, wherein the compensation element ( 24 ) is designed and arranged such that it the valve needle ( 18 ) surrounds.
  4. Injection device ( 2 . 3 ) according to one of the preceding claims, wherein at least one area ( 24b ) of the compensation element ( 24 ) is formed in the form of a bellows.
  5. Injection device ( 2 . 3 ) according to one of the preceding claims, wherein at least one area ( 24a . 24c ) of the compensation element ( 24 ) gas-tight with the valve sleeve ( 21 ) connected is.
  6. Injection device ( 2 . 3 ) according to one of the preceding claims, wherein the compensation element ( 24 ) in at least one area ( 24a . 24c ) has a wall thickness (d1) of 0.1 mm to 0.5 mm, in particular of 0.3 mm.
  7. Injection device ( 2 . 3 ) according to one of the preceding claims, wherein the compensation element ( 24 ) in at least one area ( 24b ) has a wall thickness (d2) of 0.05 mm to 0.10 mm, in particular of 0.08 mm.
  8. Injection device ( 2 . 3 ) according to one of the preceding claims with an adjusting sleeve ( 14 ), which are attached to a housing ( 4 ) of the injection device ( 2 ) is fixed.
  9. Injection device ( 2 . 3 ) according to one of the preceding claims with an inlet area ( 32 ), wherein in the inlet area ( 32 ) a filter element ( 28 ) is arranged.
  10. Injection device ( 3 ) according to claim 9, wherein the filter element ( 28 ) by an adjustment sleeve ( 38 ) in the feed ( 32 ) is fixed.
DE201010039052 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 Withdrawn DE102010039052A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE201010039052 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
DE201010039052 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
DE102010039052A1 true DE102010039052A1 (en) 2012-02-09

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DE201010039052 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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Cited By (8)

* Cited by examiner, † Cited by third party
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

Citations (1)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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 (10)

* Cited by examiner, † Cited by third party
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
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
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
EP3521581A1 (en) * 2018-02-01 2019-08-07 Continental Powertrain USA, LLC Injector for reductant delivery unit having fluid volume reduction assembly

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