US20140013728A1 - Fluid cooled injector and exhaust aftertreatment system, vehicle, and method using a fluid cooled injector - Google Patents

Fluid cooled injector and exhaust aftertreatment system, vehicle, and method using a fluid cooled injector Download PDF

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Publication number
US20140013728A1
US20140013728A1 US14/003,805 US201114003805A US2014013728A1 US 20140013728 A1 US20140013728 A1 US 20140013728A1 US 201114003805 A US201114003805 A US 201114003805A US 2014013728 A1 US2014013728 A1 US 2014013728A1
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US
United States
Prior art keywords
injector
heat conducting
conducting shield
orifice
fluid cooled
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
US14/003,805
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English (en)
Inventor
Sten Shao
Philip Meier
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.)
Mack Trucks Inc
Original Assignee
Mack Trucks Inc
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 Mack Trucks Inc filed Critical Mack Trucks Inc
Priority to US14/003,805 priority Critical patent/US20140013728A1/en
Assigned to MACK TRUCKS, INC. reassignment MACK TRUCKS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MEIER, PHILIP, SHAO, STEN
Publication of US20140013728A1 publication Critical patent/US20140013728A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • 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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/36—Arrangements for supply of additional fuel
    • 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
    • F01N2260/20—Exhaust treating devices having provisions not otherwise provided for for heat or sound protection, e.g. using a shield or specially shaped outer surface of exhaust device
    • 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
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • 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
    • F01N2610/11—Adding substances to exhaust gases the substance or part of the dosing system being cooled
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • the present invention relates generally to fluid cooled injectors and, more particularly, to such injectors including heat shields to facilitate heat transfer from the injector tip.
  • the inventors have discovered what they understand to be the mechanism behind the clogging problem and have devised a simple solution to address the problem.
  • the inventors realized that, when diesel fuel is heated to around 180-230° C., the fuel tends to become sticky and can adhere to surfaces. Further investigation revealed that the mixture of soot and fuel can bind strongly on a metal surface at this temperature range. Above the temperature range, the bonded mixture becomes loosed and will ordinarily easily come off the surface and, below the temperature range, the mixture of soot and fuel will not ordinarily adhere to the surface.
  • temperatures around the seventh injector tip in vehicles can vary from about 100-280° C. depending upon engine application and running conditions. They believe that this explains why clogging tends to occur for some vehicles, but not for others, because the temperature at the seventh injector tip varies.
  • the temperature around the seventh injector tip can be in the range of around 180-230° C. at which the fuel tends to become sticky and adheres to surfaces, thus tending to clog the seventh injectors in these vehicles.
  • a fluid cooled injector comprises an injector body comprising an injector tip and a cooling channel, the injector tip comprising an injector orifice, and a heat conducting shield, the heat conducting shield comprising a heat conducting shield orifice arranged coaxially with the injector orifice, the heat conducting shield being in direct contact with at least one of the injector body and the injector tip to transfer heat from the injector tip to the cooled injector body.
  • a heat conducting shield for a fluid cooled injector comprising an injector body comprising an injector tip and a cooling channel, the injector tip comprising an injector orifice.
  • the heat conducting shield comprises a first portion having a heat conducting shield orifice adapted to be arranged coaxially with the injector orifice and a second portion, separate from the first pot at least one of the first portion and the second portion being adapted to be in direct contact with the injector body.
  • a method of regenerating a diesel particulate filter (DPF) in an exhaust aftertreatment system includes injecting fuel into or upstream of the DPF through an injector orifice in an injector tip of an injector, cooling a main body of the injector from which the injector tip extends by circulating a coolant through channels in the injector, and transferring heat from the injector tip via a heat conducting shield in direct contact with at least one of the injector tip the main body around the injector tip, and comprising a heat conducting Shield orifice arranged coaxially with the injector orifice.
  • DPF diesel particulate filter
  • the beat conducting shield may include a coating of a material to prevent fuel and exhaust matter from adhering to the shield.
  • a suitable material may be Teflon® or another non-stick coating.
  • the coating material is applied to a surface of the heat conducting shield exposed to the exhaust gas flow.
  • FIG. 1A is a schematic, cross-sectional view of an injector according to an aspect of the Present invention
  • FIG. 1B is a schematic, cross-sectional view of a portion of an injector according to an aspect of the present invention
  • FIG. 2 is as cross-sectional view of a heat conducting shield according to an aspect of the present invention.
  • FIG. 3 schematically shows an engine and a portion of an exhaust aftertreatment system according to an aspect of the present invention.
  • FIG. 1A shows a fluid cooled injector 21 according to an aspect of the present invention.
  • the injector 21 comprises an injector body 23 comprising an injector tip 25 and a cooling channel 27 through which a coolant (not shown) is circulated.
  • the cooling channel 27 is ordinarily ring shaped and surrounds a central passage 28 leading to an injector orifice 29 in the injector tip.
  • the injector 21 further comprises a heat conducting shield 31 to facilitate heat transfer away from the injector tip 25 and more particularly, the portion 33 of the injector tip surrounding the outlet of the injector orifice 29 , to the cooled injector body 23 in order to maintain the temperature of the portion surrounding the outlet of the injector orifice below the critical temperature, i.e., usually below about 180° C.
  • the heat conducting shield comprises a heat conducting shield orifice 35 arranged coaxially with the injector orifice 29 .
  • the heat conducting shield 31 is in direct contact with at least one of the injector body 23 and the injector tip 25 (shown in contact with both in FIGS. 1A and 1B ).
  • the heat conducting shield 31 is shown in cross-section in FIGS. 1B and 2 .
  • the heat conducting shield 31 is ordinarily made of a material that is at least as conductive as the material from which the injector tip 25 is made.
  • a presently preferred material for the heat conducting shield 31 is copper, although other materials are also suitable.
  • the injector 21 can be a seventh injector of the type commonly used in diesel engine exhaust systems such as that shown in FIG. 3 .
  • the exhaust system may be of the type used in a vehicle 100 as shown schematically in phantom.
  • the injector 21 can he arranged downstream of a diesel engine 37 and in or upstream of an exhaust aftertreatment component such as a diesel particulate filter 39 (DPF).
  • DPF diesel particulate filter 39
  • the injector 21 can be arranged to inject fuel into the exhaust gas stream in order to e.g., raise the temperature in the DPF 37 to regenerate the DPF.
  • the injector 21 may be used for purposes other than raising the temperature of a DPF during regeneration, however, that is a typical application of such an injector.
  • the injector body 23 comprises a main body portion 41 and the injector tip 25 comprises a cylindrical portion 43 that extends from the main body portion.
  • the cylindrical portion 43 can be generally circularly cylindrical or a series of stepped, circularly cylindrical portions as shown in FIGS. 1A-1B , which shapes can facilitate manufacturing or it can be other shapes.
  • it is typically desirable that the cylindrical portion is less massive than the Main body portion 41 .
  • the heat conducting shield 31 can be in direct contact with at least part of the cylindrical portion 41 , ordinarily at least the portion 33 of the injector tip 25 surrounding the outlet of the injector orifice 29 , which is typically the top surface of the cylindrical portion surrounding the injector orifice.
  • the heat conducting shield 31 may be spaced from at least part of the cylindrical portion 41 as seen in, e.g., FIG. 1B so that the heat conducting shield may only contact the cylindrical portion at the portion 33 surrounding the outlet of the injector orifice 29 , however, the heat conducting shield may contact the entire exterior surface of the injector tip 25 .
  • the heat conducting shield 31 can also or alternatively be in direct heat conducting contact with the main body portion 41 .
  • a heat sink paste may be applied between the heat conducting shield and the body portion and tip.
  • an empty space 45 may be provided between exterior wall surfaces 47 , 49 , and 51 of the injector tip 25 and interior wall surfaces 53 , 55 , and 57 of the heat conducting shield 31 .
  • a surface of an outer side of the heat conducting shield 31 is intended to be exposed to exhaust gas and unburned hydrocarbon (fuel).
  • the exposed, outer surface of the heat conducting shield may be coated with a non-stick coating, such as Teflon® or another suitable coating material.
  • the heat conducting shield 31 may be secured to the injector 21 in any suitable fashion.
  • FIG. 1B shows the heat conducting shield 31 secured to the injector 21 by means of an interference fit between an interior surface 59 of the heat conducting shield 31 and an exterior surface 61 of the injector tip 25 .
  • the injector tip 25 and the heat conducting shield 31 may have a threaded connection, or the heat conducting shield may be secured to the main body portion 41 , such as by welding, brazing, by some suitable fasteners, or by an adhesive such as epoxy.
  • the heat conducting shield 31 can be a variety of shapes, however, a presently preferred shape includes a first portion 63 having the heat conducting, shield orifice 35 , with the heat conducting shield orifice and the injector orifice being arranged coaxially.
  • the first portion 63 can be adapted to contact the injector tip 25 by the portion 33 of the injector tip around the injector orifice 29 .
  • a second portion 65 of the heat conducting shield 31 is separate from the first portion 63 and can be adapted to be in direct contact with the injector body 23 and the injector tip.
  • the heat conducting shield 31 comprises a generally cylindrical wall 67 including interior surfaces 53 , 55 , 57 , and 59 defining an opening for receiving the injector tip 25 .
  • the second portion 65 of the heat conducting shield 31 can comprise a flange 69 disposed annularly around the first portion 63 .
  • a DPF 39 of an exhaust aftertreatment system as shown in FIG. 3 is regenerated by injecting fuel into or upstream of the DPF through an injector orifice ( 29 . FIGS. 1A-2 ) in an injector tip ( 25 . FIGS. 1A-2 ) of an injector 21 .
  • a main body ( 41 FIGS. 1A-1B ) of the injector 21 from which the injector tip extends is cooled b circulating a coolant through a channel ( 27 FIG. 1A ) in the injector 21 , Heat from the injector tip is transferred via the heat conducting shield ( 31 , FIGS.
  • the temperature of the portion 33 of the injector tip 25 around the injector orifice 29 is kept at a temperature below a critical, temperature of about 180° C. above which diesel fuel tends to become sticky and adhere to the injector tip, thereby reducing the possibility of clogging. Coolant flow can be controlled to adjust the temperature of the portion 33 of the injector tip 25 in response to different conditions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Nozzles (AREA)
US14/003,805 2011-04-04 2011-09-16 Fluid cooled injector and exhaust aftertreatment system, vehicle, and method using a fluid cooled injector Abandoned US20140013728A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/003,805 US20140013728A1 (en) 2011-04-04 2011-09-16 Fluid cooled injector and exhaust aftertreatment system, vehicle, and method using a fluid cooled injector

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201161471371P 2011-04-04 2011-04-04
US14/003,805 US20140013728A1 (en) 2011-04-04 2011-09-16 Fluid cooled injector and exhaust aftertreatment system, vehicle, and method using a fluid cooled injector
PCT/US2011/051895 WO2012138373A1 (en) 2011-04-04 2011-09-16 Fluid cooled injector and exhaust aftertreatment system, vehicle, and method using a fluid cooled injector

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US20140013728A1 true US20140013728A1 (en) 2014-01-16

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US14/003,805 Abandoned US20140013728A1 (en) 2011-04-04 2011-09-16 Fluid cooled injector and exhaust aftertreatment system, vehicle, and method using a fluid cooled injector

Country Status (7)

Country Link
US (1) US20140013728A1 (de)
EP (1) EP2694784A4 (de)
JP (1) JP2014514493A (de)
CN (1) CN103649479A (de)
BR (1) BR112013025571A2 (de)
RU (1) RU2013148822A (de)
WO (1) WO2012138373A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018104442A1 (de) 2018-02-27 2018-04-19 FEV Europe GmbH Verbrennungsmotor mit Injektor

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EP3317500B1 (de) 2015-06-30 2020-08-05 Cummins, Inc. Abschirmung für düsenverbrennung
DE102017209256A1 (de) * 2017-06-01 2018-12-06 Robert Bosch Gmbh Verfahren zur Herstellung einer kraftschlüssigen Verbindung zwischen mindestens zwei Bauteilen, Dosiermodul mit Hitzeschild
US10677138B2 (en) * 2018-03-23 2020-06-09 Vitesco Technologies USA, LLC Heat shield and gasket for reductant delivery unit

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US6279603B1 (en) * 1998-10-01 2001-08-28 Ambac International Fluid-cooled injector
US6814303B2 (en) * 2002-04-03 2004-11-09 Cleaire Advanced Emission Controls Fluid-cooled mount for an injector
US7467749B2 (en) * 2004-04-26 2008-12-23 Tenneco Automotive Operating Company Inc. Methods and apparatus for injecting atomized reagent
US7926262B2 (en) * 2007-05-31 2011-04-19 Caterpillar Inc. Regeneration device purged with combustion air flow

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JP4886636B2 (ja) * 2007-09-04 2012-02-29 日野自動車株式会社 インジェクタの取付構造
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Publication number Priority date Publication date Assignee Title
US6279603B1 (en) * 1998-10-01 2001-08-28 Ambac International Fluid-cooled injector
US6814303B2 (en) * 2002-04-03 2004-11-09 Cleaire Advanced Emission Controls Fluid-cooled mount for an injector
US7467749B2 (en) * 2004-04-26 2008-12-23 Tenneco Automotive Operating Company Inc. Methods and apparatus for injecting atomized reagent
US7926262B2 (en) * 2007-05-31 2011-04-19 Caterpillar Inc. Regeneration device purged with combustion air flow

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018104442A1 (de) 2018-02-27 2018-04-19 FEV Europe GmbH Verbrennungsmotor mit Injektor
DE102019104542A1 (de) 2018-02-27 2019-04-18 FEV Europe GmbH Verbrennungsmotor mit Injektor

Also Published As

Publication number Publication date
BR112013025571A2 (pt) 2016-12-27
EP2694784A1 (de) 2014-02-12
CN103649479A (zh) 2014-03-19
RU2013148822A (ru) 2015-05-10
JP2014514493A (ja) 2014-06-19
WO2012138373A1 (en) 2012-10-11
WO2012138373A8 (en) 2013-11-07
EP2694784A4 (de) 2014-09-10

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AS Assignment

Owner name: MACK TRUCKS, INC., NORTH CAROLINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHAO, STEN;MEIER, PHILIP;REEL/FRAME:031160/0185

Effective date: 20130829

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION