EP2998563A1 - Dispositif d'épuration/refroidissement, unité egr et système de moteur - Google Patents

Dispositif d'épuration/refroidissement, unité egr et système de moteur Download PDF

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Publication number
EP2998563A1
EP2998563A1 EP14770225.2A EP14770225A EP2998563A1 EP 2998563 A1 EP2998563 A1 EP 2998563A1 EP 14770225 A EP14770225 A EP 14770225A EP 2998563 A1 EP2998563 A1 EP 2998563A1
Authority
EP
European Patent Office
Prior art keywords
cleaning
liquid
area
cooling
exhaust gas
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Withdrawn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
EP14770225.2A
Other languages
German (de)
English (en)
Other versions
EP2998563A4 (fr
Inventor
Takamichi HOSONO
Katsuhiro YOSHIZAWA
Hidekazu Iwasaki
Motohiko Nishimura
Masanori Higashida
Tetsuo Nogami
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.)
Kawasaki Heavy Industries Ltd
Kawasaki Motors Ltd
Original Assignee
Kawasaki Heavy Industries Ltd
Kawasaki Jukogyo KK
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 Kawasaki Heavy Industries Ltd, Kawasaki Jukogyo KK filed Critical Kawasaki Heavy Industries Ltd
Publication of EP2998563A1 publication Critical patent/EP2998563A1/fr
Publication of EP2998563A4 publication Critical patent/EP2998563A4/fr
Withdrawn legal-status Critical Current

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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
    • F02M26/36—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for adding fluids other than exhaust gas to the recirculation passage; with reformers
    • 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
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
    • 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
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor

Definitions

  • the present invention relates to a cleaning/cooling device which cleans and cools an exhaust gas.
  • EGR exhaust gas recirculation
  • the exhaust gas may contain a large amount of particulate matters (PM) and sulfur oxide (SOx).
  • PM particulate matters
  • SOx sulfur oxide
  • the PM and the SOx need to be removed from the exhaust gas to be recirculated.
  • a wet gas scrubber which removes the PM and the SOx by a cleaning liquid is effective (see a reference sign 15 of Fig. 2 in PTL 1).
  • a gas cooler may be provided downstream of the scrubber.
  • the exhaust gas cleaned by the scrubber is in a saturated state and contains a large amount of moisture. Therefore, when the cleaned exhaust gas is cooled by the gas cooler, a large amount of moisture in the exhaust gas is discharged as condensed water. Thus, the moisture contained in the exhaust gas can be removed. Therefore, by providing the gas cooler as above, the moisture of the exhaust gas can be prevented from adhering to devices provided downstream of the gas cooler, and therefore, the corrosion of those devices and the like can be suppressed.
  • the cleaning liquid used by the scrubber and the condensed water generated by the gas cooler are discharged to and temporarily pooled in a surge tank provided separately.
  • a surge tank provided separately.
  • the used cleaning liquid and the condensed water are pooled in the surge tank.
  • a neutralizing agent needs to be added to the surge tank or a pipe. The reason for this is as follows. When the cleaning liquid or the condensed water absorbs the SOx, a pH value of the cleaning liquid or the condensed water decreases, and the cleaning liquid or the condensed water turns acidic.
  • the pH value of the liquid in the surge tank is adjusted by the addition of the neutralizing agent.
  • the amount of cleaning liquid circulating in the EGR unit is extremely large in reality, a response reaction of the pH value is slow, and stabilizing the pH value within an ideal range is not easy.
  • the surge tank In a case where the surge tank is arranged so as to be separated from the scrubber and the gas cooler, it is practically impossible to maintain the pressure in the surge tank at high pressure that is substantially equal to internal pressure of the EGR line, and the liquid in the surge tank is pooled under atmospheric pressure.
  • the pressure of the cleaning liquid which has decreased to the atmospheric pressure needs to be increased to pressure substantially equal to internal pressure of the scrubber. Therefore, a pump to be used increases in size, and power consumption of the pump increases.
  • the capacity of the surge tank needs to be large.
  • the EGR unit includes the surge tank
  • the EGR unit naturally has to include pipes and the like attached to the surge tank.
  • providing the surge tank is an obstruction for the decrease in size of the EGR unit.
  • the present invention was made under the above circumstances, and an object of the present invention is to configure an EGR unit not including a surge tank.
  • a cleaning/cooling device is a device constituting a part of an EGR unit and includes: a cleaning portion configured to clean an exhaust gas by using a cleaning liquid; and a cooling portion provided adjacent to the cleaning portion and configured to cool the exhaust gas cleaned by the cleaning portion, wherein: the cleaning portion includes a liquid area in which the cleaning liquid used for cleaning is pooled; the cooling portion includes a liquid area which receives condensed water generated by cooling the exhaust gas; and the liquid area of the cleaning portion and the liquid area of the cooling portion are directly connected to each other.
  • the phrase "directly connected to each other” denotes that the liquid areas are connected to each other without through a tank and does not include a case where the liquid areas are "indirectly connected to each other" through a tank.
  • the case where the liquid area of the cleaning portion and the liquid area of the cooling portion are "directly connected to each other” may denote: a case where the liquid area of the cleaning portion and the liquid area of the cooling portion are integrally formed as a single water pooling portion; a case where the liquid area of the cleaning portion and the liquid area of the cooling portion are connected to each other through a pipe; and a case where the liquid in the liquid area of the cleaning portion and the liquid in the liquid area of the cooling portion are directly moved to each other by a pump or the like.
  • the EGR unit including the cleaning/cooling device does not require a surge tank which pools the cleaning liquid.
  • the cleaning/cooling device may be configured such that: the cleaning portion includes a gas area through which the cleaned exhaust gas flows; the cooling portion includes a gas area through which the exhaust gas to be cooled flows; and the gas area of the cleaning portion and the gas area of the cooling portion are directly connected to each other. According to this configuration, since the cleaning portion and the cooling portion are directly connected to each other, the EGR unit can be further reduced in size.
  • the cleaning/cooling device may be configured such that the cleaning portion and the cooling portion are defined by an inner wall of an outer frame case and a dividing member which divides an internal space of the outer frame case. According to this configuration, the cleaning/cooling device can be configured to have an extremely simple structure.
  • the cleaning/cooling device may be configured such that: the gas area of the cleaning portion and the gas area of the cooling portion are directly connected to each other in a vicinity of an upper end of the dividing member; and the liquid area of the cleaning portion and the liquid area of the cooling portion are directly connected to each other in a vicinity of a lower end of the dividing member. According to this configuration, a space in the outer frame case can be used efficiently.
  • the cleaning/cooling device may be configured such that the dividing member has a plate shape. According to this configuration, the cleaning/cooling device can be configured to have a simpler structure.
  • the cleaning/cooling device may be configured such that the cleaning portion pumps up the cleaning liquid in the liquid area and injects the cleaning liquid to the exhaust gas.
  • the cleaning/cooling device may be configured such that the cleaning portion emits the exhaust gas to an inside of the cleaning liquid in the liquid area. According to this configuration, cleaning by a water pool method can be performed by efficiently utilizing the liquid area of the cleaning portion.
  • an EGR unit includes the above cleaning/cooling device, wherein the exhaust gas cleaned and cooled by the cleaning/cooling device is recirculated to an engine.
  • an engine system includes the above EGR unit.
  • the EGR unit includes the above-described cleaning/cooling device, the EGR unit not including the surge tank can be configured.
  • Embodiment 1 will be explained in reference to Figs. 1 and 2 .
  • Fig. 1 is a block diagram showing the engine system 100.
  • the engine system 100 includes an engine 10, a turbocharger 20, and an EGR unit 30.
  • the engine 10 of the present embodiment is a propelling main engine for a ship and is a two-stroke diesel engine.
  • a scavenging gas (“supply gas" in the case of the four-stroke engine) is supplied from the turbocharger 20 through a scavenging passage 11 to the engine 10.
  • An exhaust gas discharged from the engine 10 is supplied through an exhaust passage 12 to the turbocharger 20.
  • the engine 10 may be a four-stroke engine, a gas engine, or a gasoline engine.
  • the engine 10 is not limited to an engine for a ship and may be an engine for a power generation facility.
  • the turbocharger 20 is a device which increases the pressure of air and supply the air to the engine 10.
  • the turbocharger 20 includes a turbine portion 21 and a compressor portion 22.
  • the exhaust gas discharged from the engine 10 is supplied to the turbine portion 21, and the turbine portion 21 rotates by energy of the exhaust gas.
  • the turbine portion 21 and the compressor portion 22 are coupled to each other by a coupling shaft 23, and the compressor portion 22 rotates in accordance with the rotation of the turbine portion 21.
  • the compressor portion 22 rotates, the air (atmosphere) taken from outside is compressed, and the compressed air is supplied to the engine 10 as the scavenging gas.
  • the EGR unit 30 is a unit by which the exhaust gas discharged from the engine 10 is returned (recirculated) to the engine 10.
  • the EGR unit 30 extracts the exhaust gas from the exhaust passage 12.
  • the extracted exhaust gas is cleaned and cooled by a cleaning/cooling device 31 (described later in detail) and is then supplied to the scavenging passage 11.
  • An EGR blower 32 is provided downstream of the cleaning/cooling device 31.
  • the exhaust gas in the EGR unit 30 is supplied to the scavenging passage 11 by power of the EGR blower 32.
  • FIG. 2 is a schematic diagram showing the cleaning/cooling device 31 according to the present embodiment.
  • the cleaning/cooling device 31 includes a cleaning portion 33, a cooling portion 34, and a circulation device 35.
  • the cleaning portion 33 is a portion which cleans the exhaust gas.
  • the cleaning portion 33 includes a gas area 36 filled with the exhaust gas and a liquid area 37 filled with the cleaning liquid.
  • a range of the gas area 36 and a range of the liquid area 37 are determined in accordance with the position of a liquid surface of the cleaning liquid.
  • An inlet port 38 is formed in the gas area 36.
  • the exhaust gas flows through the inlet port 38 into the cleaning portion 33.
  • An injection nozzle 39 which injects the cleaning liquid is provided in the gas area 36.
  • the exhaust gas is cleaned by the cleaning liquid injected from the injection nozzle 39.
  • the cleaning liquid which has taken PM and SOx from the exhaust gas falls by its own weight to be pooled in the liquid area 37. A part of the cleaning liquid vaporizes to be absorbed by the exhaust gas. Thus, the exhaust gas becomes a saturated state.
  • the cooling portion 34 is a portion which cools the exhaust gas cleaned by the cleaning portion 33. By cooling the exhaust gas, the condensed water can be generated, and the moisture can be removed from the exhaust gas.
  • the cooling portion 34 also includes a gas area 40 filled with the exhaust gas and a liquid area 41 filled with a liquid (condensation water and cleaning liquid).
  • the gas area 40 of the cooling portion 34 and the gas area 36 of the cleaning portion 33 are directly connected to each other through a gas connecting port 42.
  • the exhaust gas cleaned by the cleaning portion 33 flows from the gas area 36 of the cleaning portion 33 through the gas connecting port 42 into the gas area 40 of the cooling portion 34.
  • a heat exchanger 43 and a mist catcher 44 are provided in the gas area 40 of the cooling portion 34.
  • An outlet port 45 is formed in the gas area 40.
  • a cooling medium flows in the heat exchanger 43 of the cooling portion 34, and the heat exchange is performed between the cooling medium and the exhaust gas.
  • the exhaust gas in the cooling portion 34 flows through the heat exchanger 43 to be cooled.
  • the mist catcher 44 catches the mist of the cleaning liquid in the exhaust gas having flowed through the heat exchanger 43.
  • the exhaust gas flows through the outlet port 45 to be discharged from the cleaning/cooling device 31.
  • the condensed water generated by cooling the exhaust gas and the cleaning liquid caught by the mist catcher 44 fall by their own weights, and the fallen condensation water and cleaning liquid are received by the liquid area 41.
  • the liquid area 41 of the cooling portion 34 and the liquid area 37 of the cleaning portion 33 are directly connected to each other through a liquid connecting port 46. Therefore, the liquid area 41 of the cooling portion 34 and the liquid area 37 of the cleaning portion 33 are integrally connected to each other under the liquid surface to form a water pooling portion 47.
  • a liquid level of the water pooling portion 47 is measured by a level meter 48 provided at the cleaning/cooling device 31.
  • a part of the cleaning liquid of the water pooling portion 47 is discharged to a wastewater treatment unit 60 and is treated, that is, for example, foreign matters are removed by a centrifuge or the like.
  • the part of the cleaning liquid treated by the wastewater treatment unit 60 is returned to the water pooling portion 47, and the rest of the cleaning liquid is discharged to outside (sea, for example).
  • a neutralizing agent is added to the water pooling portion 47 from a neutralizing agent adding device 49, and clear water is supplied to the water pooling portion 47 from a clear water supply device 50.
  • the cleaning portion 33 and the cooling portion 34 are defined by: an inner wall 52 of an outer frame case 51; and a dividing member 53 which divides an internal space of the outer frame case 51.
  • the shape of the outer frame case 51 and the shape of the dividing member 53 are not limited.
  • the outer frame case 51 has a shape similar to a rectangular solid, and the dividing member 53 has a plate shape.
  • a leftward/rightward direction on the sheet of Fig. 2 is defined as a "first direction”
  • a direction perpendicular to the sheet of Fig. 2 is defined as a "second direction”.
  • the dividing member 53 of the present embodiment is located at a substantially center of the outer frame case 51 in the first direction and extends in the second direction.
  • Both second direction end portions of the dividing member 53 contact the inner wall 52 of the outer frame case 51.
  • a gap is formed between an upper end of the dividing member 53 and the inner wall 52 of the outer frame case 51, and this gap constitutes the gas connecting port 42.
  • a gap is formed between a lower end of the dividing member 53 and the inner wall 52 of the outer frame case 51, and this gap constitutes the liquid connecting port 46.
  • the circulation device 35 is a device which pumps up the cleaning liquid in the water pooling portion 47 and supplies the cleaning liquid to the injection nozzle 39 of the cleaning portion 33.
  • the circulation device 35 is mainly constituted by: a circulation pipe 54 connecting the water pooling portion 47 and the injection nozzle 39; and a circulating pump 55 disposed on the circulation pipe 54.
  • a pH meter 56 and a SO 4 ion counter 57 are disposed on the circulation pipe 54.
  • the cleaning/cooling device 31 controls the amount of neutralizing agent added from the neutralizing agent adding device 49, the amount of clear water supplied from the clear water supply device 50, and the amounts of cleaning liquid flowing into and flowing out from the wastewater treatment unit 60 based on measured values of the pH meter 56, the SO 4 ion counter 57, and the level meter 48 such that: the liquid level of the water pooling portion 47 is always located above an upper end portion of the liquid connecting port 46 connecting the liquid area 37 and the liquid area 41 (i.e., a case is prevented, in which the liquid surface of the cleaning liquid becomes lower than the upper end portion of the liquid connecting port 46, and a part of the exhaust gas in the gas area 36 of the cleaning portion 33 flows through the liquid connecting port 46 into the gas area 40 of the cooling portion 34 (a part of the exhaust gas in the gas area 36 of the cleaning portion 33 bypasses the heat exchanger 43 and the mist catcher 44)); the pH value falls within a predetermined range; and the SO 4 ion concentration becomes not more than a certain value.
  • the liquid area 37 of the cleaning portion 33 and the liquid area 41 of the cooling portion 34 are directly connected to each other in the outer frame case 51, and the cleaning liquid in the water pooling portion 47 integrally constituted by the liquid areas 37 and 41 is pumped up to be injected from the injection nozzle 39. Therefore, the cleaning liquid to be injected from the injection nozzle 39 does not have to be pumped up from a surge tank or the like.
  • the EGR unit 30 does not require the surge tank or the like, and therefore, the EGR unit 30 can be reduced in size.
  • the EGR unit 30 according to the present embodiment may be mounted on the engine 10 depending on the engine 10.
  • the EGR unit 30 of the present embodiment does not include the surge tank, and the cleaning liquid is integrally pooled in the water pooling portion 47 located at a lower portion of the cleaning portion 33 and a lower portion of the cooling portion 34 in the outer frame case 51. Therefore, the amount of cleaning liquid circulating in the EGR unit 30 can be suppressed. On this account, the response reaction of the pH value of the cleaning liquid by the addition of the neutralizing agent or the like is quick, and therefore, the pH value of the cleaning liquid can be maintained within an appropriate range. Since the neutralizing agent does not exist in the condensed water generated in the cooling portion 34, sulfur slightly remaining after the cleaning dissolves in the condensed water.
  • the pH value of the condensed water normally becomes lower than the pH value of the cleaning liquid which has reacted with the exhaust gas in the cleaning portion 33. Even if the pH value of the condensed water of the cooling portion 34 and the pH value of the cleaning liquid of the cleaning portion 33 are different from each other as above, these liquids are quickly mixed with each other. This is because the water pooling portion 47 is integrally constituted by the liquid areas 37 and 41 in the present embodiment. Thus, the pH value can be controlled collectively. As a result, the removal of the SOx from the exhaust gas which is to be recirculated to the engine 10 can be efficiently performed.
  • the pH value of the cleaning liquid flowing through the circulation pipe 54 of the circulation device 35 does not become too low, excessive countermeasures for the corrosion of the circulation pipe 54 are unnecessary. Further, for example, when the used cleaning liquid is discharged from the wastewater treatment unit 60 to the sea, it is thought that the pH value of the cleaning liquid conveyed from the EGR unit 30 to the wastewater treatment unit 60 can easily satisfy standard (wastewater standard) of the pH value for the discharge to the sea. Therefore, it is unnecessary to perform a neutralization treatment in the wastewater treatment unit 60.
  • the cleaning liquid pooled in the cleaning portion 33 is utilized as the cleaning liquid injected from the injection nozzle 39 of the cleaning portion 33. Therefore, a large pressure difference is not generated between an inlet portion and outlet portion of the circulation pipe 54. Therefore, it is unnecessary to increase the size of the circulating pump 55 of the circulation device 35, and the power consumption can be suppressed.
  • An engine system 200 according to the present embodiment is basically the same as the engine system 100 according to Embodiment 1 except that a cleaning method by the cleaning portion 33 is a combination of a spray method and a water pool method.
  • a cleaning method by the cleaning portion 33 is a combination of a spray method and a water pool method.
  • the cleaning/cooling device 31 according to the present embodiment will be mainly explained.
  • Fig. 3 is a schematic diagram showing the cleaning/cooling device 31 according to the present embodiment.
  • the cleaning portion 33 of the cleaning/cooling device 31 according to the present embodiment includes a liquid area introduction passage 58.
  • the liquid area introduction passage 58 extends from the inlet port 38 formed at the cleaning portion 33 to the inside of the cleaning liquid in the liquid area 41.
  • the entire exhaust gas having flowed into the cleaning portion 33 can be introduced to the liquid area 41.
  • the injection nozzle 39 is provided in the vicinity of the inlet port 38 of the liquid area introduction passage 58.
  • the injection nozzle 39 injects the cleaning liquid to the exhaust gas having flowed into the cleaning portion 33 (liquid area introduction passage 58).
  • the cleaning liquid injected from the injection nozzle 39 is the cleaning liquid pumped up from the water pooling portion 47.
  • the exhaust gas to which the cleaning liquid has been injected flows through the liquid area introduction passage 58 to be emitted to the inside of the cleaning liquid in the liquid area 37. With this, the exhaust gas is further cleaned by the cleaning liquid pooled in the liquid area 37.
  • the engine system 200 according to the present embodiment can more efficiently clean the exhaust gas.
  • the liquid area 37 of the cleaning portion 33 and the liquid area 41 of the cooling portion 34 are directly connected to each other through the gap between the outer frame case 51 and the dividing member 53.
  • these areas 37 and 41 may be directly connected to each other by a different configuration.
  • the present invention includes a case where: the gap is not formed between the outer frame case 51 and the dividing member 53; a through hole is formed on the dividing member 53; and the liquid areas 37 and 41 are directly connected to each other through the through hole.
  • the present invention includes a case where: the gap is not formed between the outer frame case 51 and the dividing member 53; the liquid areas 37 and 41 are coupled to each other through a short pipe; and the liquid areas 37 and 41 are directly connected to each other through the pipe.
  • the present invention may be configured such that: the dividing member 53 is provided so as not to allow the communication between the cleaning portion 33 and the cooling portion 34 in the outer frame case 51; and a pipe, a duct, or the like through which the gas areas 36 and 40 communicate with each other and a pipe, a duct, or the like through which the liquid areas 37 and 42 communicate with each other are provided outside the outer frame case 51.
  • the present invention may be configured such that: the liquid area 37 of the cleaning portion 33 and the liquid area 41 of the cooling portion 34 are completely separated from each other by a lower end of the dividing plate 53; and a pipe connected to the injection nozzle 39 and a Y-shaped pipe connected to the liquid area 37 and the liquid area 41 are provided.
  • the liquid in the liquid area 37 and the liquid in the liquid area 41 can meet in the Y-shaped pipe, and then, these liquids can be supplied to the injection nozzle 39.
  • the water pooling portion 47 is constituted by the liquid area 37 of the cleaning portion 33 and the liquid area 41 of the cooling portion 34.
  • An EGR unit not including a surge tank can be configured by including the cleaning/cooling device of the present invention in the EGR unit. Therefore, the present invention is useful in the technical field of EGR units.
EP14770225.2A 2013-03-18 2014-03-18 Dispositif d'épuration/refroidissement, unité egr et système de moteur Withdrawn EP2998563A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013055160 2013-03-18
PCT/JP2014/001551 WO2014148048A1 (fr) 2013-03-18 2014-03-18 Dispositif d'épuration/refroidissement, unité egr et système de moteur

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Publication Number Publication Date
EP2998563A1 true EP2998563A1 (fr) 2016-03-23
EP2998563A4 EP2998563A4 (fr) 2016-11-30

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EP (1) EP2998563A4 (fr)
JP (1) JP5940727B2 (fr)
KR (1) KR101784883B1 (fr)
CN (1) CN104981603B (fr)
WO (1) WO2014148048A1 (fr)

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CN104981603B (zh) 2017-10-31
CN104981603A (zh) 2015-10-14
JPWO2014148048A1 (ja) 2017-02-16
JP5940727B2 (ja) 2016-06-29
KR101784883B1 (ko) 2017-11-06
KR20150121238A (ko) 2015-10-28
WO2014148048A1 (fr) 2014-09-25

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