WO2013165432A1 - Appareil pour nettoyer un refroidisseur d'egr - Google Patents

Appareil pour nettoyer un refroidisseur d'egr Download PDF

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Publication number
WO2013165432A1
WO2013165432A1 PCT/US2012/036404 US2012036404W WO2013165432A1 WO 2013165432 A1 WO2013165432 A1 WO 2013165432A1 US 2012036404 W US2012036404 W US 2012036404W WO 2013165432 A1 WO2013165432 A1 WO 2013165432A1
Authority
WO
WIPO (PCT)
Prior art keywords
egr cooler
tank
vent
mount
line
Prior art date
Application number
PCT/US2012/036404
Other languages
English (en)
Inventor
Eduardo GONCALVES
Original Assignee
International Engine Intellectual Property Company, Llc
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 International Engine Intellectual Property Company, Llc filed Critical International Engine Intellectual Property Company, Llc
Priority to PCT/US2012/036404 priority Critical patent/WO2013165432A1/fr
Publication of WO2013165432A1 publication Critical patent/WO2013165432A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents

Definitions

  • the exhaust may be passed through an EGR cooler, which is typically a co-current or counter- current heat exchanger.
  • the heat exchanger may comprise an outer case housing internal cooler tubes.
  • the cooler tubes are configured for internal flow of relatively cooler fluid that will cool the exhaust counter-flowing through the outer case.
  • the cooler tubes may become fouled due to the combustion by- products present in the exhaust, such as unburned fuel, water, and hydrocarbons.
  • the heat exchange effectiveness of the EGR cooler diminishes. Diminished heat exchange results in recirculated exhaust that is not sufficiently cooled to adequately reduce ⁇ emissions.
  • Such fouled cooler tubes must be cleaned to return the EGR cooler to acceptable operation.
  • a cleaning station for an EGR cooler comprises a tank configured to hold cleaning solution.
  • the tank has a closeable fluid fill port and a closeable tank vent.
  • An air supply line is fluidly coupled to tank.
  • a tank out line has a first end fluidly coupled to the tank and a second end configured to fluidly couple with engage an upstream end of an EGR cooler.
  • a closeable EGR cooler out line is configured to fluidly couple with a downstream end of the EGR cooler.
  • a cleaning station for an EGR cooler includes a tank for holding cleaning solution.
  • a tank out line fluidly couples the tank to an input of a circulating pump.
  • An EGR cooler supply line has a first end fluidly coupled to an output of the pump and a second end configured to fluidly couple with an upstream end of an EGR cooler.
  • An EGR cooler out line is configured to interconnect a downstream end of an EGR cooler with the tank, for recirculating cleaning fluid to the tank.
  • FIG. 1 shows a first design for an EGR cooler cleaning system
  • EGR cooler mounted in the cleaning system.
  • FIG. 2 shows a vent valve configuration for the EGR cooler cleaning station of Figure 1.
  • FIG. 3 shows a second design for an EGR cooler cleaning system, with an EGR cooler mounted in the cleaning system.
  • Figure 1 shows a first design for an EGR cooler cleaning system 10.
  • EGR cooler 12 may be of the typical co-current or counter-current heat exchange design.
  • the EGR cooler 12 is removed from the vehicle on which it is installed for mounting in the EGR cooler cleaning station 10.
  • the EGR cooler 12 is mounted between upstream adjustable mount 14 and downstream adjustable mount 16.
  • upstream adjustable mount 14 and downstream adjustable mount 16 may be adjustable to accommodate EGR coolers 12 of various dimensions.
  • the EGR cooler cleaning station 10 includes a tank 18 in fluid communication with the EGR cooler 12 through tank out line 22.
  • Tank 18 is filled through fluid fill port 20.
  • Fluid port valve 21 regulates the flow of fluid from fluid fill port 20 to tank 18.
  • tank 18 Also connected to tank 18 is compressed air supply line 26 connected to air regulator valve 24. Pressurized air may be directed to tank 18 through air supply line 26. Flow meter 28 may engage air supply line 26 to measure the amount of air flowing into tank 18 through air supply line 26. The air supplied through air supply line 26 may be pressurized in any conventional manner and may consist of pressurized shop air. [0012] A vent valve 30 engages tank vent line 32 and EGR cooler vent line 36.
  • each of tank vent line 32 and EGR cooler vent line 36 may each have their own dedicated vent valve.
  • EGR cooler cleaning station 10 also includes a drain valve 38 in EGR cooler out line 40.
  • Drain valve 38 regulates flow of cleaning fluid from tank 18 and EGR cooler 12.
  • vent valve 30 is opened and drain valve 38 is closed.
  • Cleaning fluid flows to tank 18 through fluid fill port 20 and fluid fill valve 21.
  • Tank 18 may include a tank fill mark 34 to designate an acceptable or minimum volume of cleaning solution for operation of EGR cooler cleaning station 10.
  • drain valve 38 In order to drain the EGR cooler cleaning station 10 of cleaning solution, drain valve 38 is opened so that cleaning solution may flow through EGR cooler out line 40 and into drain tank 42.
  • a pressure transducer 44 may gauge the pressure of the fluid in tank out line 22. Data from the pressure transducer 44 may be transmitted to data acquisition control unit 46 for analysis.
  • EGR cooler 12 may be mounted in EGR cooler cleaning station 10 by adjusting upstream adjustable mount 14 and downstream adjustable mount 16.
  • Tank out line 22 is connected to the upstream end of EGR cooler 12 while EGR cooler out line 40 is connected to the downstream end of EGR cooler 12.
  • EGR cooler vent line 36 is attached to EGR cooler vent 37.
  • drain valve 38 is closed, vent valve 30 is opened, fluid fill valve 21 is opened, and air regulator valve 24 is closed.
  • Cleaning solution is then flowed into tank through fluid fill port 20 and fluid fill valve 21 until fluid solution fills the EGR cooler 12 and tank 18. If tank 18 includes a tank fill mark 34, the cleaning solution should fill the tank 18 to the tank fill mark 34.
  • the cleaning solution is held within EGR cooler cleaning station 10 for an adequate amount of time to accomplish the desired cleaning of the cooler tubes within EGR cooler 12.
  • Acceptable cleaning fluids for use in EGR cooler cleaning station may include "Quick n Bright” available at quicknbright.com, Tar Rid Asphalt and Tar Remover available at Demandproducts.com, Easy Off BBQ Grill cleaner, and
  • the length of time of this soak cycle will depend on the cleaner selected as well as the condition of the EGR cooler 12. Specifically, an EGR cooler 12 with greater fouling on its cooler tubes will require a longer soak cycle.
  • the degree of fouling can be predetermined by measuring air restriction through the EGR cooler 12 before cleaning is performed, by flowing compressed air through the system while measuring pressure at pressure transducer 44 and air flow rate at flow meter 28. The data so obtained may be compared with an existing clean EGR cooler data to determine the degree of fouling for a particular EGR cooler.
  • vent valve 30 and fluid fill valve 21 are closed.
  • Air regulator valve 24 is opened and pressurized air flows into tank 18 through air supply line 26 to pressurize the EGR cooler cleaning station 10. Any pressurized air source may be employed, including shop air typically found in workshops.
  • drain valve 38 is opened to its full extent to permit rapid draining of the EGR cooler cleaning station 10.
  • the pressurized cleaning station 10 will simultaneously wash and rinse the cooler tubes within EGR cooler 12.
  • Drain valve 38 may be sufficiently large so that there will be negligible pressure drop across drain valve 38. In such circumstances, the pressure drop of the air flow through EGR cooler 12 may be determined by a single pressure transducer 44. Alternatively, a second pressure transducer may be positioned downstream of EGR cooler 12 to provide a second pressure measurement for comparison to the pressure measured at pressure transducer 44 to determine the pressure drop across EGR cooler 12. The pressure drop versus air flow is evaluated to determine whether EGR cooler 12 has been sufficiently cleaned.
  • FIG. 2 shows a vent valve configuration for the EGR cooler cleaning station of Figure 1.
  • Vent valve 30 may engage both tank vent line 32 and EGR cooler vent line 36.
  • the arrows shown in Figure 2 illustrate the flow of air vented from the tank 18 and the EGR cooler 12 during fill.
  • Figure 3 shows a second design for an EGR cooler cleaning system 60.
  • the EGR cooler 62 is removed from the vehicle and mounted in the EGR cooler cleaning station 60.
  • EGR cooler 62 is mounted between upstream adjustable mount 64 and downstream adjustable mount 66. As indicated in Figure 3, upstream adjustable mount 64 and downstream adjustable mount 66 may be adjusted to accommodate EGR coolers 62 of different dimensions.
  • EGR cooler cleaning station 60 also includes tank 68.
  • Tank 68 holds the cleaning solution that will be used to clean EGR cooler 62.
  • EGR cooler 62 has a vent 69. Vent 69 is attached to EGR cooler vent line
  • EGR cooler vent line 70 Flow through EGR cooler vent line 70 is regulated through vent valve 72.
  • Cleaning solution from tank 68 flows through tank out line 78, fluid circulating pump 80, and EGR cooler supply line 82. Flow of the cleaning solution through EGR cooler supply line 82 may be monitored with flow meter 84.
  • pressure relief valve 86 is positioned on relief drain line 88 to crack open and relieve the excess pressure thus preventing damage to the EGR cooler tubes.
  • Relief drain line 88 drains into drain tank 90.
  • Tank 68 may be emptied through drain valve 92 and drain line 94.
  • the pressure differential across EGR cooler 62 may be determined by taking pressure measurements at upstream pressure transducer 96 and downstream pressure transducer 98.
  • Upstream pressure transducer 96 and downstream pressure transducer 98 may be connected through data communication connections 100 to a data acquisition control unit 102.
  • other components of the EGR cooler cleaning station 60 may be connected through data communication connections 100 to the data acquisition control unit.
  • fluid circulating pump 80, wash valve 76, vent valve 72, and flow meter 84 may be connected to data acquisition control unit 102 through data communication connections 100. Operation of fluid circulating pump 80, wash valve 76, and vent valve 72 may be controlled by data acquisition control unit 102, which may be a properly-programmed computer.
  • EGR cooler 62 may be mounted in EGR cooler cleaning station 60 by adjusting upstream adjustable mount 64 and downstream adjustable mount 66.
  • EGR cooler supply line 82 is connected to the upstream end of EGR cooler 62 while
  • EGR cooler out line 74 is attached to the downstream end. Also, EGR cooler vent line 70 is attached to EGR cooler 62 at EGR cooler vent 69.
  • EGR cooler 62 is mounted in EGR cooler cleaning station 60, the wash valve 76 is closed and vent valve 72 may be opened. Fluid circulating pump 80 may be activated to draw cleaning solution out of tank 68 through tank out line 78 and into EGR cooler supply line 82. In this way, EGR cooler 62 is filled with cleaning solution while air may be vented from EGR cooler 62 through EGR cooler vent line 70 and vent valve 72.
  • the cleaning solution is held within EGR cooler 62 for a predetermined amount of time. This constitutes the soak cycle.
  • the length of time for the soak cycle will depend on the extent to which the internal cooler tubes of EGR cooler are fouled.
  • vent valve 72 may be closed. Wash valve 76 may then be opened. Fluid circulating pump 80 may then be activated so that a pressure wash cycle of EGR cooler 62 may be started.
  • the pressure relief valve 86 prevents system overpressure that may damage the EGR cooler 62.
  • the duration of the wash cycle may depend on the cleaning solution used and the degree of fouling of the cooler tubes within the EGR cooler 62.
  • pressure measurements at upstream pressure transducer 96 and downstream pressure transducer 98 are evaluated to determine whether EGR cooler 62 has been sufficiently cleaned. Alternatively, pressure measurements may be taken during the power wash cycle.
  • EGR cooler 62 After EGR cooler 62 has been cleaned, fluid circulating pump 80 is turned off and a vent valve 72 is opened. Cleaning solution from EGR cooler 62 flows out of EGR cooler 62 through EGR cooler out line 74 and wash valve 76 into tank 68. Tank 68 may be emptied through drain valve 92 and drain line 94.

Abstract

L'invention concerne une station de nettoyage pour un refroidisseur de recirculation de gaz d'échappement (EGR) qui comprend un réservoir destiné à contenir une solution de nettoyage. Dans un mode de réalisation, le réservoir présente un orifice de remplissage de fluide qui peut être fermé et un évent de réservoir qui peut être fermé. Une conduite d'amenée d'air est accouplée fluidiquement au réservoir. Une conduite de sortie du réservoir est conçue pour accoupler fluidiquement le réservoir à une extrémité amont d'un refroidisseur d'EGR. Une conduite de sortie du refroidisseur d'EGR pouvant être fermée est conçue pour s'accoupler fluidiquement à une extrémité aval d'un refroidisseur d'EGR. Dans un autre mode de réalisation, une pompe de circulation de fluide comprend une entrée accouplée fluidiquement au réservoir et une sortie qui peut être accouplée fluidiquement à une extrémité amont d'un refroidisseur d'EGR. Une conduite de sortie de refroidisseur d'EGR est conçue pour accoupler fluidiquement une extrémité aval d'un refroidisseur d'EGR au réservoir, pour renvoyer le fluide de nettoyage au réservoir en recirculation.
PCT/US2012/036404 2012-05-03 2012-05-03 Appareil pour nettoyer un refroidisseur d'egr WO2013165432A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2012/036404 WO2013165432A1 (fr) 2012-05-03 2012-05-03 Appareil pour nettoyer un refroidisseur d'egr

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2012/036404 WO2013165432A1 (fr) 2012-05-03 2012-05-03 Appareil pour nettoyer un refroidisseur d'egr

Publications (1)

Publication Number Publication Date
WO2013165432A1 true WO2013165432A1 (fr) 2013-11-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4365423A1 (fr) 2022-11-04 2024-05-08 Winterthur Gas & Diesel Ltd. Dispositif de refroidissement de gaz

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030084924A1 (en) * 2001-11-07 2003-05-08 Bg Products, Inc. Method and apparatus for cleaning a fuel injected engine plenum
US6904898B1 (en) * 2003-09-09 2005-06-14 Volvo Lastyagnar Ab Method and arrangement for reducing particulate load in an EGR cooler
US20070084206A1 (en) * 2005-10-17 2007-04-19 Lew Mae L EGR cooler purging apparatus and method
US20100078046A1 (en) * 2008-09-30 2010-04-01 Mohamed Emam Labib Apparatus and method for cleaning passageways such as endoscope channels using flow of liquid and gas
US20110131979A1 (en) * 2009-12-04 2011-06-09 International Engine Intellectual Property Company, Llc Egr cooler cleaning system and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030084924A1 (en) * 2001-11-07 2003-05-08 Bg Products, Inc. Method and apparatus for cleaning a fuel injected engine plenum
US6904898B1 (en) * 2003-09-09 2005-06-14 Volvo Lastyagnar Ab Method and arrangement for reducing particulate load in an EGR cooler
US20070084206A1 (en) * 2005-10-17 2007-04-19 Lew Mae L EGR cooler purging apparatus and method
US20100078046A1 (en) * 2008-09-30 2010-04-01 Mohamed Emam Labib Apparatus and method for cleaning passageways such as endoscope channels using flow of liquid and gas
US20110131979A1 (en) * 2009-12-04 2011-06-09 International Engine Intellectual Property Company, Llc Egr cooler cleaning system and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4365423A1 (fr) 2022-11-04 2024-05-08 Winterthur Gas & Diesel Ltd. Dispositif de refroidissement de gaz

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