US20090071132A1 - Heated urea conduit arrangement for an exhaust-gas aftertreatment system for an internal combustion engine - Google Patents

Heated urea conduit arrangement for an exhaust-gas aftertreatment system for an internal combustion engine Download PDF

Info

Publication number
US20090071132A1
US20090071132A1 US12/285,584 US28558408A US2009071132A1 US 20090071132 A1 US20090071132 A1 US 20090071132A1 US 28558408 A US28558408 A US 28558408A US 2009071132 A1 US2009071132 A1 US 2009071132A1
Authority
US
United States
Prior art keywords
hose
heated
conduit
shrink
conduits
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.)
Abandoned
Application number
US12/285,584
Inventor
Klaus Schmelter
Christof Kirsch
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.)
ContiTech Techno Chemie GmbH
Original Assignee
ContiTech Techno Chemie 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 ContiTech Techno Chemie GmbH filed Critical ContiTech Techno Chemie GmbH
Assigned to CONTITECH TECHNO-CHEMIE GMBH reassignment CONTITECH TECHNO-CHEMIE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHMELTER, KLAUS, KIRSCH, CHRISTOF
Publication of US20090071132A1 publication Critical patent/US20090071132A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/153—Arrangements for the insulation of pipes or pipe systems for flexible pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
    • F16L53/30—Heating of pipes or pipe systems
    • F16L53/32—Heating of pipes or pipe systems using hot fluids
    • 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
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • 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
    • 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
    • F01N2610/1473—Overflow or return means for the substances, e.g. conduits or valves for the return path

Definitions

  • the invention relates to a heated urea conduit arrangement for an exhaust-gas aftertreatment system of an internal combustion engine.
  • the hose conduits between the storage vessel and the exhaust conduit must be heatable since there is the risk of the aqueous urea solution freezing below ⁇ 11° C. It is known to use electrically heatable hoses.
  • a hose conduit which conducts the aqueous urea solution, runs parallel to a hose conduit which conducts heating water, and in that the two hose conduits are tightly surrounded by a hose which shrinks when heated.
  • the hose conduit which conducts the urea solution is positioned parallel to a hose conduit which conducts heating water and which comprises preferably a thermally conductive elastomer.
  • the hose which shrinks when heated presses the two hose conduits together and, as a result, a good transfer of heat is obtained.
  • the shrink hose is a fabric shrink hose.
  • the fabric can, for example, be polyester which is coated with a polyolefin.
  • the fabric shrink hose effects a close contact between the two hose conduits, which run parallel, and this ensures a good transfer of heat.
  • the fabric shrink hose is sewn together parallel to the axis and has a satisfactory degree of design-related expansion. This leads to a degree of flexibility which is required for easy location of the hose pack within the engine compartment.
  • the fabric shrinks, such that the two hose conduits, which form the hose pack, run so as to bear constantly against one another, with the linear contact being reliably maintained.
  • the hose conduit pair which is held together by the shrink hose, is surrounded by an insulating foam hose.
  • the heat which comes from the heating water is thus supplied in a targeted manner to the hose which conducts the urea solution.
  • FIG. 1 is a perspective view of the hose conduit pair which is held together by a fabric shrink hose;
  • FIG. 2 shows a cross section of the arrangement shown in FIG. 1 .
  • a hose conduit 3 which conducts aqueous urea solution is arranged adjacent, and parallel, to a hose conduit 4 which conducts heating water.
  • the two hose conduits 3 and 4 are surrounded by a fabric shrink hose 5 which has shrinkage properties when heated.
  • the two media-conducting hose conduits 3 and 4 which are surrounded by the fabric shrink hose 5 , are pressed against one another with linear contact. This generates a type of heat-exchanger effect.
  • the heat which is present in the heating water of the one hose conduit 4 is supplied to the hose conduit 3 which conducts the urea solution. The heat transfer is sufficient to prevent the urea solution from freezing.
  • the hose conduit pair 3 and 4 which is surrounded by the fabric shrink hose 5 , runs in an insulating foam hose 7 .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Pipe Accessories (AREA)
  • Thermal Insulation (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

A heated urea conduit arrangement includes a hose conduit (3), which conducts an aqueous urea solution, and runs parallel to a hose conduit (4) carrying heating water. Both hose conduits (3, 4) are surrounded by another hose (5) that shrinks around them when heated.

Description

    CROSS REFERENCE TO RELATED APPLICATIONS
  • This application is a continuation application of international patent application PCT/EP 2007/051820, filed Feb. 27, 2007, designating the United States and claiming priority from German application 10 2006 017 414.3, filed Apr. 13, 2006, and the entire content of both applications is incorporated herein by reference.
    • FIELD OF THE INVENTION
  • The invention relates to a heated urea conduit arrangement for an exhaust-gas aftertreatment system of an internal combustion engine.
    • BACKGROUND OF THE INVENTION
  • To reduce nitrogen oxide emissions of an internal combustion engine, it is known to convert nitrogen oxide into atmospheric nitrogen and water vapor by means of selective catalytic reduction (SCR) technology. As a reducing agent, use is made of an aqueous urea solution which is carried in a separate storage vessel.
  • The hose conduits between the storage vessel and the exhaust conduit must be heatable since there is the risk of the aqueous urea solution freezing below −11° C. It is known to use electrically heatable hoses.
    • SUMMARY OF THE INVENTION
  • It is an object of the invention to provide a heated urea conduit arrangement which acts satisfactorily and reliably without the use of electrical energy.
  • The object is achieved according to the invention in that a hose conduit, which conducts the aqueous urea solution, runs parallel to a hose conduit which conducts heating water, and in that the two hose conduits are tightly surrounded by a hose which shrinks when heated.
  • With the invention, the hose conduit which conducts the urea solution is positioned parallel to a hose conduit which conducts heating water and which comprises preferably a thermally conductive elastomer. The hose which shrinks when heated (shrink hose) presses the two hose conduits together and, as a result, a good transfer of heat is obtained.
  • In an advantageous embodiment of the invention, the shrink hose is a fabric shrink hose. The fabric can, for example, be polyester which is coated with a polyolefin.
  • The fabric shrink hose effects a close contact between the two hose conduits, which run parallel, and this ensures a good transfer of heat. The fabric shrink hose is sewn together parallel to the axis and has a satisfactory degree of design-related expansion. This leads to a degree of flexibility which is required for easy location of the hose pack within the engine compartment.
  • When heated, the fabric shrinks, such that the two hose conduits, which form the hose pack, run so as to bear constantly against one another, with the linear contact being reliably maintained.
  • In a further advantageous embodiment of the invention, the hose conduit pair, which is held together by the shrink hose, is surrounded by an insulating foam hose. The heat which comes from the heating water is thus supplied in a targeted manner to the hose which conducts the urea solution.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention will now be described with reference to the drawings wherein:
  • FIG. 1 is a perspective view of the hose conduit pair which is held together by a fabric shrink hose; and,
  • FIG. 2 shows a cross section of the arrangement shown in FIG. 1.
    •  DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION
  • A hose conduit 3 which conducts aqueous urea solution is arranged adjacent, and parallel, to a hose conduit 4 which conducts heating water. The two hose conduits 3 and 4 are surrounded by a fabric shrink hose 5 which has shrinkage properties when heated. The two media-conducting hose conduits 3 and 4, which are surrounded by the fabric shrink hose 5, are pressed against one another with linear contact. This generates a type of heat-exchanger effect. The heat which is present in the heating water of the one hose conduit 4 is supplied to the hose conduit 3 which conducts the urea solution. The heat transfer is sufficient to prevent the urea solution from freezing.
  • The hose conduit pair 3 and 4, which is surrounded by the fabric shrink hose 5, runs in an insulating foam hose 7.
  • It is understood that the foregoing description is that of the preferred embodiments of the invention and that various changes and modifications may be made thereto without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (4)

1. A heated urea conduit arrangement for an exhaust-gas aftertreatment system of an internal combustion engine, the arrangement comprising:
a first hose conduit for conducting an aqueous urea solution;
a second hose conduit for conducting heated water;
said first and second hose conduits running side-by-side and parallel to each other; and,
a shrink hose surrounding said first and second hose conduits and said shrink hose being configured to shrink when heated thereby causing said first and second conduits to run in tight contact with each other thereby ensuring a good thermal transfer therebetween.
2. The heated urea conduit arrangement of claim 1, wherein said shrink hose is made of a shrinkable, flexible fabric.
3. The heated urea conduit arrangement of claim 2, wherein said fabric is a fabric coated with polyolefin.
4. The heated urea conduit arrangement of claim 1, further comprising an insulating foam hose surrounding said shrink hose holding said first and second hose conduits.
US12/285,584 2006-04-13 2008-10-09 Heated urea conduit arrangement for an exhaust-gas aftertreatment system for an internal combustion engine Abandoned US20090071132A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006017414.3 2006-04-13
DE102006017414A DE102006017414A1 (en) 2006-04-13 2006-04-13 Heated urea line for exhaust aftertreatment systems of internal combustion engines
PCT/EP2007/051820 WO2007118728A1 (en) 2006-04-13 2007-02-27 Heated urea conduit for exhaust gas after treatment systems for internal combustion engines

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/051820 Continuation WO2007118728A1 (en) 2006-04-13 2007-02-27 Heated urea conduit for exhaust gas after treatment systems for internal combustion engines

Publications (1)

Publication Number Publication Date
US20090071132A1 true US20090071132A1 (en) 2009-03-19

Family

ID=37986788

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/285,584 Abandoned US20090071132A1 (en) 2006-04-13 2008-10-09 Heated urea conduit arrangement for an exhaust-gas aftertreatment system for an internal combustion engine

Country Status (5)

Country Link
US (1) US20090071132A1 (en)
EP (1) EP2010766B1 (en)
AT (1) ATE478243T1 (en)
DE (2) DE102006017414A1 (en)
WO (1) WO2007118728A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110214418A1 (en) * 2008-11-13 2011-09-08 Albonair Gmbh Component carrier for a dosing system
CN103046986A (en) * 2012-12-26 2013-04-17 潍柴动力股份有限公司 SCR (selective catalytic reduction) system, urea heating device and urea heating method of SCR system
CN106715852A (en) * 2014-09-30 2017-05-24 霓达株式会社 Heat-insulated pipe arrangement
US9719395B2 (en) 2011-05-10 2017-08-01 Albonair Gmbh Component carrier for a dosing system
CN110520663A (en) * 2017-04-21 2019-11-29 德国诺玛公司 Pipeline sub-assembly

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3053731B1 (en) * 2016-07-05 2020-05-15 Renault S.A.S PASSIVE HEATING SYSTEM OF AN SCR SYSTEM
GB2554850A (en) * 2016-07-12 2018-04-18 Ramfoam Ltd Conduit formation and use
DE202017106495U1 (en) 2017-10-26 2017-11-13 Elmeric Gmbh Heatable flexible hose with applied heating element
DE102017125104A1 (en) 2017-10-26 2019-05-02 Elmeric Gmbh Heatable flexible hose with applied heating element
DE102018113632A1 (en) * 2018-06-07 2019-12-12 Norma Germany Gmbh Guide channel and line arrangement

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151633A (en) * 1961-03-29 1964-10-06 Owens Corning Fiberglass Corp Shaped thermal insulation for pipe
US3269422A (en) * 1963-01-09 1966-08-30 Moore & Co Samuel Composite tubing product and apparatus and method for manufacturing the same
US3446601A (en) * 1964-12-16 1969-05-27 Stamicarbon Device for preparing urea
US3669157A (en) * 1970-06-01 1972-06-13 Carolina Narrow Fabric Co Shrinkable tubular fabric
US3853149A (en) * 1970-05-14 1974-12-10 Moore & Co Samuel Composite tubing
US3955601A (en) * 1972-11-29 1976-05-11 Moore Business Forms, Inc. Heat insulating jacket for a conduit equipped with self-locking seam
US4123837A (en) * 1976-02-12 1978-11-07 Exxon Research & Engineering Co. Heat transfer method
US4194536A (en) * 1976-12-09 1980-03-25 Eaton Corporation Composite tubing product
US4399319A (en) * 1981-11-18 1983-08-16 Bio-Energy Systems, Inc. Thermally insulated composite flexible hose
US4461347A (en) * 1981-01-27 1984-07-24 Interlab, Inc. Heat exchange assembly for ultra-pure water
US4631098A (en) * 1983-01-06 1986-12-23 Raychem Limited Heat-recoverable article
US4900596A (en) * 1985-11-25 1990-02-13 Raychem Corporation Wraparound fabric article and method of making the same
US20010018034A1 (en) * 2000-02-28 2001-08-30 Satoshi Wakasa Ammonia generating apparatus
US6810916B2 (en) * 2003-01-24 2004-11-02 Dt Search & Designs, Llc Heated drain line apparatus
US6845611B2 (en) * 2001-12-03 2005-01-25 Purem Abgassysteme Gmbh & Co. Kg Reducing agent dosing device
US20070068144A1 (en) * 2005-09-26 2007-03-29 Denso Corporation Reducing agent reforming device and exhaust gas control system using the same
US20070079599A1 (en) * 2003-09-05 2007-04-12 Nissan Diesel Motor Co., Ltd. Exhaust gas purifying apparatus in engine
US20090064666A1 (en) * 2006-04-13 2009-03-12 Waldemar Behrendt Heatable hose conduit system for an exhaust-gas aftertreatment system of an internal combustion engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE667728A (en) * 1964-08-28
DE3925704A1 (en) * 1989-08-03 1991-02-21 Wieland Werke Ag EXCHANGER
DE4438093C1 (en) * 1994-10-25 1996-03-28 Continental Ag Ventilation device for parts of motor vehicle engines
GB2418478A (en) * 2004-09-24 2006-03-29 Ti Group Automotive Sys Ltd A heat exchanger

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151633A (en) * 1961-03-29 1964-10-06 Owens Corning Fiberglass Corp Shaped thermal insulation for pipe
US3269422A (en) * 1963-01-09 1966-08-30 Moore & Co Samuel Composite tubing product and apparatus and method for manufacturing the same
US3446601A (en) * 1964-12-16 1969-05-27 Stamicarbon Device for preparing urea
US3853149A (en) * 1970-05-14 1974-12-10 Moore & Co Samuel Composite tubing
US3669157A (en) * 1970-06-01 1972-06-13 Carolina Narrow Fabric Co Shrinkable tubular fabric
US3955601A (en) * 1972-11-29 1976-05-11 Moore Business Forms, Inc. Heat insulating jacket for a conduit equipped with self-locking seam
US4123837A (en) * 1976-02-12 1978-11-07 Exxon Research & Engineering Co. Heat transfer method
US4194536A (en) * 1976-12-09 1980-03-25 Eaton Corporation Composite tubing product
US4461347A (en) * 1981-01-27 1984-07-24 Interlab, Inc. Heat exchange assembly for ultra-pure water
US4399319A (en) * 1981-11-18 1983-08-16 Bio-Energy Systems, Inc. Thermally insulated composite flexible hose
US4631098A (en) * 1983-01-06 1986-12-23 Raychem Limited Heat-recoverable article
US4900596A (en) * 1985-11-25 1990-02-13 Raychem Corporation Wraparound fabric article and method of making the same
US20010018034A1 (en) * 2000-02-28 2001-08-30 Satoshi Wakasa Ammonia generating apparatus
US6845611B2 (en) * 2001-12-03 2005-01-25 Purem Abgassysteme Gmbh & Co. Kg Reducing agent dosing device
US6810916B2 (en) * 2003-01-24 2004-11-02 Dt Search & Designs, Llc Heated drain line apparatus
US20070079599A1 (en) * 2003-09-05 2007-04-12 Nissan Diesel Motor Co., Ltd. Exhaust gas purifying apparatus in engine
US20070068144A1 (en) * 2005-09-26 2007-03-29 Denso Corporation Reducing agent reforming device and exhaust gas control system using the same
US20090064666A1 (en) * 2006-04-13 2009-03-12 Waldemar Behrendt Heatable hose conduit system for an exhaust-gas aftertreatment system of an internal combustion engine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110214418A1 (en) * 2008-11-13 2011-09-08 Albonair Gmbh Component carrier for a dosing system
US8984862B2 (en) 2008-11-13 2015-03-24 Albonair Gmbh Component carrier for a dosing system
US9719395B2 (en) 2011-05-10 2017-08-01 Albonair Gmbh Component carrier for a dosing system
CN103046986A (en) * 2012-12-26 2013-04-17 潍柴动力股份有限公司 SCR (selective catalytic reduction) system, urea heating device and urea heating method of SCR system
CN106715852A (en) * 2014-09-30 2017-05-24 霓达株式会社 Heat-insulated pipe arrangement
US10428995B2 (en) 2014-09-30 2019-10-01 Nitta Corporation Heat-insulated pipe arrangement
CN110520663A (en) * 2017-04-21 2019-11-29 德国诺玛公司 Pipeline sub-assembly
KR20190137907A (en) * 2017-04-21 2019-12-11 노르마 저머니 게엠베하 Line assembly
US20200056528A1 (en) * 2017-04-21 2020-02-20 Norma Germany Gmbh Line Assembly
KR102412177B1 (en) * 2017-04-21 2022-06-23 노르마 저머니 게엠베하 line assembly

Also Published As

Publication number Publication date
EP2010766A1 (en) 2009-01-07
DE502007004789D1 (en) 2010-09-30
EP2010766B1 (en) 2010-08-18
ATE478243T1 (en) 2010-09-15
DE102006017414A1 (en) 2007-10-18
WO2007118728A1 (en) 2007-10-25

Similar Documents

Publication Publication Date Title
US20090071132A1 (en) Heated urea conduit arrangement for an exhaust-gas aftertreatment system for an internal combustion engine
JP5533234B2 (en) Urea water tank structure
US10190463B2 (en) Exhaust system, especially for an internal combustion engine of a vehicle
US8209957B2 (en) Heatable hose conduit system for an exhaust-gas aftertreatment system of an internal combustion engine
JP6136960B2 (en) Exhaust system structure of internal combustion engine
US9062582B2 (en) Exhaust post-treatment device and method for a vehicle, with a reductant vaporising surface being warmed by a Peltier element
JP5020878B2 (en) Exhaust gas purification reducing agent thawing heat retention device
US8424777B2 (en) Reducing agent heating system
JP6064591B2 (en) Thermoelectric generator
US10883411B2 (en) Systems and methods for an exhaust-gas aftertreatment device
US20080041841A1 (en) Piping with heater and connecting method of the piping
US9366454B2 (en) Heatable connection apparatus including media-conducting, electrically heatable hoses
WO2007125572A1 (en) Heater component for pipe joint
KR101856895B1 (en) System and method of catalyst frost protection of selective catalytic reduction
KR20200046064A (en) Connectors for heatable fluid ducts, especially in SCR systems or water spray systems
JP4166713B2 (en) Piping with heater and its connection method
CN208153108U (en) A kind of urea electric heating pipeline for SCR system
CN109667646A (en) The emission-control equipment of internal combustion engine
CN112824660B (en) Lean burn engine aftertreatment system
CN104420951A (en) Cooling def doser
CN219993775U (en) SCR system electrical heating urea pipe
KR20170061151A (en) Heat-insulated pipe arrangement
JP2016070190A (en) Adiabatic pipe
CN215830573U (en) Heating pipeline, solid ammonia system and vehicle
JP2007032545A (en) Exhaust emission control system for internal combustion engine

Legal Events

Date Code Title Description
AS Assignment

Owner name: CONTITECH TECHNO-CHEMIE GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHMELTER, KLAUS;KIRSCH, CHRISTOF;REEL/FRAME:021904/0868;SIGNING DATES FROM 20081020 TO 20081103

STCB Information on status: application discontinuation

Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION