WO2013055363A1 - Mécanisme de purge de condensat de recyclage de gaz d'échappement et procédé correspondant - Google Patents

Mécanisme de purge de condensat de recyclage de gaz d'échappement et procédé correspondant Download PDF

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Publication number
WO2013055363A1
WO2013055363A1 PCT/US2011/056379 US2011056379W WO2013055363A1 WO 2013055363 A1 WO2013055363 A1 WO 2013055363A1 US 2011056379 W US2011056379 W US 2011056379W WO 2013055363 A1 WO2013055363 A1 WO 2013055363A1
Authority
WO
WIPO (PCT)
Prior art keywords
condensate
drain
cooler
egr
exhaust
Prior art date
Application number
PCT/US2011/056379
Other languages
English (en)
Inventor
Martin R. Zielke
Bashar Y. Melhem
Luis Carlos Cattani
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/US2011/056379 priority Critical patent/WO2013055363A1/fr
Publication of WO2013055363A1 publication Critical patent/WO2013055363A1/fr

Links

Classifications

    • 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
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/08—EGR systems specially adapted for supercharged engines for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional compressor

Definitions

  • the present invention relates to an apparatus and method for preventing condensate buildup, which could present a freezing issue, in an exhaust gas recirculation (EGR) system for a vehicle.
  • EGR exhaust gas recirculation
  • the present invention provides methods and apparatus for draining condensate from an EGR system and directing the liquid to other systems of the vehicle.
  • an EGR condensate drain mechanism having an engine exhaust system for directing an exhaust stream from an engine through a conduit and then into an exhaust cooler where water vapor is condensed, pooled and systematically drained from the cooler to prevent freezing.
  • the cooler includes a sidewall to define a chamber and a drain means within the sidewall for removing the condensate from a pooling area in the chamber.
  • the drain means includes a fluid port positioned within the sidewall of the exhaust cooler proximate the pooling area, a drain line attached to the fluid port, and a one-way valve located in one of either the fluid port or the drain line.
  • the opening and closing of the one-way valve is typically responsive to the amount of condensate collected in the pooling area. Other parameters may be used to control the valve as well.
  • the condensate is discharged by connecting the drain means to a target component of the vehicle including a breather tube, a turbo outlet, a diesel particular filter outlet, and a combustion chamber. Where multiple drain lines are used, more than one target component may be fed condensate.
  • a plurality of fluid ports may be used with at least one being positioned in a sidewall of the high-temperature chamber and at least one being positioned in a sidewall of the low-temperature chamber.
  • the disclosed method for draining condensate from an EGR cooler comprising the steps of directing an exhaust stream from an engine into an exhaust cooler, cooling the exhaust stream within the cooler creating condensate due to the existence of water vapor in the exhaust stream, pooling the condensate in an area of the cooler, and opening a drain valve within a port or drain line fluidly connected to the area of the cooler to allow the pooled condensate to drain from the cooler.
  • FIG. 1 is a schematic illustrating additional potential targets for directing condensate drained by the present invention.
  • FIG. 2 is a cross-section of an exhaust gas recirculation (EGR) cooler illustrating an embodiment of the present condensate drain system
  • FIGS. 3A - 3C are cross-sections of a portion of the EGR cooler illustrating operation of a check valve positioned at the connection point between a drain line and the EGR cooler;
  • FIG. 4 is another cross-section of a portion of the EGR cooler illustrating a different potential drain area
  • FIG. 5 is an illustration of a potential target for directing condensate drained by the present invention. Detailed Description Of Preferred Embodiments
  • FIG. 1 there is schematically illustrated a typical engine 100 and various engine systems, including EGR system 10.
  • exhaust is discharged from the engine 100 to the exhaust manifold 102, and then to an exhaust treatment system 104 via exhaust piping, for example.
  • Some of the exhaust is routed from the engine exhaust manifold 102 through a pipe 14 having a control valve 16 and into the EGR cooler 12, where it is cooled and piped back into the engine intake manifold 110.
  • the cooler recirculated exhaust helps moderate engine operation temperatures.
  • the EGR system 10 is comprised of an inlet pipe 14 from the engine exhaust manifold 102, an inlet control valve 16, a cooler 12 having a high-temperature chamber 20 and a low-temperature chamber 22, and an outlet pipe 18 leading back to the engine intake manifold 110.
  • the EGR system is well-understood by those skilled in the art and, for the sake of clarity and conciseness, is not described in greater detail herein.
  • the cooler 12 includes a first chamber, i.e., a high-temperature chamber 20, and a second chamber, i.e., a low-temperature chamber 22. Exhaust gases enter the high-temp chamber 20 and low-temp chamber 22 where the gases are cooled. Resident water vapor condenses in the chambers 20, 22 to form condensate on the chamber walls which, over time, can present operation problems, particularly where freezing occurs. To alleviate the condensate problem, a drain port 30 is placed in the cooler chamber wall.
  • the drain port 30 may be positioned at a number of strategic areas of the cooler
  • drain port The most likely positions for placement of a drain port are where the greatest pooling of the condensate occurs.
  • a drain port may be positioned proximate the low-temp chamber outlet 19 where maximum exhaust gas cooling occurs, and/or at the lowest point of the cooler where a considerable amount of condensate will eventually drain back to after vehicle shut down.
  • Other potential placements of drain ports, single or multiple, may be suitable as well.
  • drain line 32 From each drain port 30 a drain line 32 is connected.
  • the drain line(s) 30 directs the condensate to one of either a collection tank (not shown) or to another vehicle component or vehicle system. Where multiple drain ports are used, the resulting multiple drain lines may converge to connect at a point. Alternatively, multiple drain lines may be directed to different areas of the engine 100 to deliver the performance-enhancing condensate.
  • FIGS. 3 A - 3C operation of ball valve 35 is illustrated.
  • FIG. 3A illustrating normal operation of the ball valve system 35
  • the ball 36 normally sits on the valve outlet 40 blocking passage and allowing condensate to pool into the valve chamber 42.
  • FIG. 3B illustrating normal operation of the ball valve system 35
  • the ball 36 floats off the valve outlet 40 which then allows the condensate to drain from the valve chamber 42.
  • FIG. 3C the ball 36 blocks passage at the valve inlet 44 to prevent the ingress of fluids to the cooler 12.
  • suitable one-way valves known to those skilled in the art may be utilized with similar results.
  • FIG. 2 also illustrates, where a plurality of drain ports and drain lines are utilized, the check valve 34 may be positioned at the connection point of the drain lines.
  • the resulting single drain line could direct the condensate to a tank (not shown) remotely mounted on the vehicle. From the tank, the condensate may be re-directed, as needed, to a number of various components or systems, including a breather tube 50 (see FIG. 5), a turbo outlet, a diesel particulate filter outlet, or a combustion chamber. Alternatively, the condensate may merely be discharged from the tank.
  • FIGS. 3A - C illustrate a drain area located in the low-temp chamber 22 of the cooler 12.
  • FIG. 4 illustrates a specific embodiment where a drain area is positioned proximate the inlet of the high-temp chamber 20.
  • either of the illustrated sites could be used to drain condensate from the cooler, or both sites could be used to drain the condensate. Additional or alternative sites may be engineered into the cooler sidewall to provide the desired drain means for removing condensate from the EGR cooler 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

L'invention concerne un mécanisme de purge de condensat de recyclage de gaz d'échappement (RGE), qui possède un système d'échappement de moteur servant à diriger un courant d'échappement provenant d'un moteur dans un conduit, puis dans un refroidisseur d'échappement où de la vapeur d'eau est condensée, rassemblée en une mare et systématiquement purgée du refroidisseur pour éviter le gel. Le refroidisseur comprend une paroi latérale servant à définir une chambre et un moyen de purge formé dans la paroi latérale pour évacuer le condensat d'une zone de rassemblement en mare dans la chambre. Le moyen de purge comprend un orifice de fluide positionné dans la paroi latérale du refroidisseur d'échappement qui est proche de la zone de rassemblement en mare, une conduite de purge attachée à l'orifice de fluide et un clapet unidirectionnel placé dans l'un ou l'autre de l'orifice de fluide et de la conduite de purge. L'ouverture et la fermeture du clapet unidirectionnel répondent typiquement à la quantité de condensat collecté dans la zone de rassemblement en mare. D'autres paramètres peuvent être utilisés pour commander le clapet tout aussi bien.
PCT/US2011/056379 2011-10-14 2011-10-14 Mécanisme de purge de condensat de recyclage de gaz d'échappement et procédé correspondant WO2013055363A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2011/056379 WO2013055363A1 (fr) 2011-10-14 2011-10-14 Mécanisme de purge de condensat de recyclage de gaz d'échappement et procédé correspondant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2011/056379 WO2013055363A1 (fr) 2011-10-14 2011-10-14 Mécanisme de purge de condensat de recyclage de gaz d'échappement et procédé correspondant

Publications (1)

Publication Number Publication Date
WO2013055363A1 true WO2013055363A1 (fr) 2013-04-18

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PCT/US2011/056379 WO2013055363A1 (fr) 2011-10-14 2011-10-14 Mécanisme de purge de condensat de recyclage de gaz d'échappement et procédé correspondant

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WO (1) WO2013055363A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020045878A (ja) * 2018-09-21 2020-03-26 いすゞ自動車株式会社 凝縮水排出機構及び凝縮水排出機構のガスケット
US11008915B2 (en) 2019-03-20 2021-05-18 Caterpillar Inc. Diesel exhaust fluid tank freeze mitigation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919670A (en) * 1955-11-03 1960-01-05 Martin Co Self-sealing one-way drain valve
US7107764B1 (en) * 2005-06-15 2006-09-19 Caterpillar Inc. Exhaust treatment system
US20100263360A1 (en) * 2007-12-20 2010-10-21 Renault Trucks Internal combustion engine arrangement with egr drain system
US20110079002A1 (en) * 2009-10-06 2011-04-07 International Engine Intellectual Property Company Llc System and method for condensate removal from egr system
US7921648B2 (en) * 2005-02-21 2011-04-12 Behr Gmbh & Co. Kg Exhaust gas turbocharger internal combustion engine
US20110225959A1 (en) * 2010-01-27 2011-09-22 Uwe Sailer Motor Vehicle Having an Exhaust Gas System

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919670A (en) * 1955-11-03 1960-01-05 Martin Co Self-sealing one-way drain valve
US7921648B2 (en) * 2005-02-21 2011-04-12 Behr Gmbh & Co. Kg Exhaust gas turbocharger internal combustion engine
US7107764B1 (en) * 2005-06-15 2006-09-19 Caterpillar Inc. Exhaust treatment system
US20100263360A1 (en) * 2007-12-20 2010-10-21 Renault Trucks Internal combustion engine arrangement with egr drain system
US20110079002A1 (en) * 2009-10-06 2011-04-07 International Engine Intellectual Property Company Llc System and method for condensate removal from egr system
US20110225959A1 (en) * 2010-01-27 2011-09-22 Uwe Sailer Motor Vehicle Having an Exhaust Gas System

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020045878A (ja) * 2018-09-21 2020-03-26 いすゞ自動車株式会社 凝縮水排出機構及び凝縮水排出機構のガスケット
JP7087874B2 (ja) 2018-09-21 2022-06-21 いすゞ自動車株式会社 凝縮水排出機構及び凝縮水排出機構のガスケット
US11008915B2 (en) 2019-03-20 2021-05-18 Caterpillar Inc. Diesel exhaust fluid tank freeze mitigation

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