WO2014196456A1 - 尿素水噴射ノズル - Google Patents
尿素水噴射ノズル Download PDFInfo
- Publication number
- WO2014196456A1 WO2014196456A1 PCT/JP2014/064321 JP2014064321W WO2014196456A1 WO 2014196456 A1 WO2014196456 A1 WO 2014196456A1 JP 2014064321 W JP2014064321 W JP 2014064321W WO 2014196456 A1 WO2014196456 A1 WO 2014196456A1
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- WO
- WIPO (PCT)
- Prior art keywords
- urea water
- nozzle
- exhaust
- flow path
- injection nozzle
- Prior art date
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- 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
- F01N3/18—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 methods of operation; Control
- F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
- B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
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- 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
- F01N3/18—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 methods of operation; Control
- F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
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- 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
- F01N3/18—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 methods of operation; Control
- F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
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- 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
- F01N3/18—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 methods of operation; Control
- F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
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- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- 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
- F01N2510/00—Surface coverings
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- 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
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
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- 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
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- 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
- F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
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- 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
- F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
- F01N2610/085—Controlling the air supply
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- 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
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- 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
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
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- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
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- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/10—Parameters used for exhaust control or diagnosing said parameters being related to the vehicle or its components
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to a urea water injection nozzle.
- the present invention relates to a urea water injection nozzle in an exhaust purification device for a ship.
- a selective reduction type NOx catalyst (DCR catalyst) is disposed inside the exhaust pipe, and ammonia is used as a reducing agent.
- An exhaust emission control device that reduces NOx to nitrogen and water is known.
- the urea water is supplied into the exhaust gas from the urea water injection nozzle disposed inside the exhaust pipe, and ammonia is generated from the urea water by the heat of the exhaust gas, so that NOx is reduced to nitrogen and water.
- Patent Document 1 does not actively remove urea water from the tip of the nozzle. For this reason, depending on the direction of the nozzle and the shape of the nozzle, it is disadvantageous in that urea water remains on the surface of the nozzle and precipitation and growth of urea cannot be effectively prevented.
- This invention is made in view of the subject which concerns, and it aims at provision of the urea water injection nozzle which can suppress precipitation and growth of urea in a urea water injection nozzle.
- a urea water flow path and a gas flow path are configured, and a urea water injection nozzle in which urea water and a gas are mixed and injected from an injection port, and is disposed along the surface of the urea water injection nozzle.
- the side discharge port is configured such that gas is discharged in the same direction as the urea water injection direction, and a water repellent coating layer is formed on the surface of the urea water injection nozzle.
- the distance from the flow path where the gas and urea water are mixed to the surface decreases as the distance from the injection port increases, and urea water injection from the injection port within a predetermined range is performed.
- the contour line in the side view of the nozzle is configured to have a constant angle with respect to the injection direction of the urea water.
- the water repellent coating layer is a ceramic coating layer.
- urea water adhering to the side surface of the urea water injection nozzle is easily removed by utilizing the water repellent effect at the nozzle tip and the discharge force of the gas discharged along the nozzle surface. Thereby, precipitation and growth of urea in the urea water injection nozzle can be suppressed.
- the inclined surface is formed in the vicinity of the injection port of the urea water injection nozzle, the urea water attached in the vicinity of the injection port is easily removed. Thereby, precipitation and growth of urea in the urea water injection nozzle can be suppressed.
- the water repellent effect is maintained even during high-temperature exhaust. Thereby, precipitation and growth of urea in the urea water injection nozzle can be suppressed.
- the partial cross section figure which shows the urea water injection nozzle of the exhaust gas purification device which relates to one execution form of this invention.
- an exhaust emission control device 100 for a marine engine will be described with reference to FIGS. 1 and 2.
- “upstream side” indicates the upstream side in the fluid flow direction
- “downstream side” indicates the downstream side in the fluid flow direction.
- the exhaust purification device 100 is provided for one engine (for example, a main engine or an auxiliary machine in a marine engine), but the present invention is not limited to this.
- a plurality of engines for example, auxiliary machinery in a marine engine
- a configuration in which exhaust from the plurality of engines is collectively purified by one exhaust purification device, or a configuration in which an exhaust purification device is provided for each engine Good.
- the exhaust pipe 21 of the engine 20 discharges exhaust from the engine 20 to the outside (atmosphere).
- An exhaust purification device 100 is provided in the exhaust pipe 21.
- the exhaust pipe 21 is provided with a branch pipe 21c and exhaust switching valves 21b and 21c for switching an exhaust passage route on the upstream side of the exhaust purification device 100.
- the branch pipe 21 a is connected to the exhaust pipe 21.
- the exhaust gas switching valve 21b is disposed inside the exhaust pipe 21 upstream of the exhaust purification device 100 and downstream of the branch pipe 21a.
- the exhaust gas switching valve 21c is disposed inside the branch pipe 21c.
- the exhaust gas switching valves 21b and 21c are configured to be able to open and close in conjunction with each other. Specifically, the exhaust switching valves 21b and 21c close the exhaust switching valve 21c when the exhaust switching valve 21b is open, and open the exhaust switching valve 21c when the exhaust switching valve 21b is closed. Configured to do. Thereby, when the exhaust gas switching valve 21b is in the open state and the exhaust gas switching valve 21c is in the closed state, the exhaust pipe 21 constitutes a path through which the exhaust gas is supplied to the exhaust gas purification device 100 (state in FIG. 1).
- the exhaust pipe 21 has a path through which the exhaust gas is not purified by the exhaust gas purification device 100 and is released to the outside (atmosphere) through the branch pipe 21c. Constitute.
- an exhaust switching valve that selectively closes one of the exhaust pipe 21 and the branch pipe 21c may be provided at the connection portion of the branch pipe 21c at the connection portion of the branch pipe 21c.
- the exhaust pipe 21 constitutes a path through which the exhaust is supplied to the exhaust purification device 100.
- the exhaust pipe 21 constitutes a path through which the exhaust is not purified by the exhaust purification device 100 and is released to the outside (atmosphere) through the branch pipe 21c.
- the exhaust purification device 100 purifies exhaust from the engine 20.
- the exhaust purification device 100 includes a urea water injection nozzle 1, a pressurized air supply pump (compressor) 6, a pressurized air valve 8, a urea water supply pump 9, a switching valve 11, a NOx detection unit 12, a control unit 13, and a first supply.
- the flow path 14, the second supply flow path 15, the NOx catalyst 18 and the like are provided.
- the urea water injection nozzle 1 supplies urea water into the exhaust pipe 21.
- the urea water injection nozzle 1 is provided in the exhaust pipe 21 on the downstream side of the exhaust gas switching valve 21b.
- the urea water injection nozzle 1 is composed of a tubular member, and is provided so that one side (downstream side) thereof is inserted from the outside to the inside of the exhaust pipe 21.
- the urea water injection nozzle 1 includes a double pipe 2, a liquid nozzle 3, an air nozzle 4, a nut 5, and the like (see FIG. 2).
- the pressurized air supply pump (compressor) 6 supplies pressurized air to the air tank 7.
- the pressurized air supply pump 6 supplies air after being pressurized (compressed).
- the pressurized air supply pump 6 supplies air to the air tank 7 when the pressure of the air tank 7 falls below a predetermined pressure, and stops when the pressure of the air tank 7 reaches a predetermined pressure.
- the pressurized air valve 8 communicates or blocks the flow path of the pressurized air.
- the pressurized air valve 8 is provided in the second supply flow path 15.
- the pressurized air valve 8 can be switched to the position V and the position W by sliding the spool. In the pressurized air valve 8, when the spool is in the position V, the second supply flow path 15 is blocked. Therefore, pressurized air is not supplied to the urea water injection nozzle 1. When the spool is in the position W, the pressurized air valve 8 communicates with the second supply flow path 15. Therefore, pressurized air is supplied to the urea water injection nozzle 1.
- the urea water supply pump 9 supplies urea water to the urea water injection nozzle 1.
- the urea water supply pump 9 is provided in the first supply flow path 14.
- the urea water supply pump 9 supplies urea water in the urea water tank 10 to the urea water injection nozzle 1 through the first supply flow path 14 at a predetermined flow rate.
- the switching valve 11 switches the urea water flow path.
- the switching valve 11 is provided on the downstream side of the urea water supply pump 9 in the first supply flow path 14.
- a drain pot 16 is connected to the switching valve 11 via a flow path 15a.
- the switching valve 11 can be switched to position X and position Y by sliding the spool. In the switching valve 11, when the spool is in the position X, the first supply flow path 14 is shut off, and the urea water injection nozzle 1 and the drain pot 16 are communicated. When the spool is in the position Y, the switching valve 11 is communicated with the first supply flow path 14. Therefore, urea water is supplied to the urea water injection nozzle 1.
- the NOx detection unit 12 detects the NOx emission amount contained in the exhaust of the engine 20.
- the NOx detection unit 12 is composed of a NOx sensor or the like, and is disposed in the middle of the exhaust pipe 21 and upstream of the NOx catalyst 18.
- the control unit 13 controls the urea water supply pump 9, the switching valve 11, the pressurized air valve 8, the exhaust switching valves 21b and 21c, and the like.
- the control unit 13 stores various programs and data for controlling the urea water supply pump 9, the switching valve 11, the pressurized air valve 8, the exhaust gas switching valves 21 b and 21 c, and the like, and the exhaust gas regulation sea area map M 1.
- the control unit 13 may be configured such that a CPU, ROM, RAM, HDD, or the like is connected by a bus, or may be configured by a one-chip LDI or the like. Further, the control unit 13 can be configured integrally with the ECU 22 that controls the engine 20.
- the control unit 13 is connected to the ECU 22, the pressurized air valve 8, the urea water supply pump 9, the switching valve 11, and the exhaust switching valves 21b and 21c, respectively.
- the control unit 13 is connected to a GPS (global positioning system) device 23.
- the control unit 13 can acquire various types of information related to the engine 20 from the ECU 22.
- the control unit 13 is connected to the NOx detection unit 12 and can acquire the NOx emission amount detected by the NOx detection unit 12.
- the control unit 13 is connected to a GPS (global positioning system) device 23 and can acquire the current position of the exhaust purification device 100 detected by the GPS device 23.
- the control unit 13 can control the pressurized air valve 8, the urea water supply pump 9, the switching valve 11, and the exhaust switching valves 21b and 21c, respectively.
- the NOx catalyst 18 promotes the NOx reduction reaction.
- the NOx catalyst 18 is disposed inside the exhaust pipe 21 and downstream of the urea water injection nozzle 1.
- the NOx catalyst 18 promotes a reaction of reducing NOx contained in exhaust gas into nitrogen and water by ammonia generated by heat and hydrolysis of urea water.
- the control device 13 acquires the current position detected by the GPS device 23, and the current position is a regulated sea area where the current position is exhausted from the regulated sea area map M1. It is determined whether or not.
- the control device 13 determines that the current position is in the exhaust restricted sea area, the control device 13 controls the exhaust switching valve 21b to be opened and the exhaust switching valve 21c to be closed. That is, the exhaust gas is purified by the exhaust gas purification device 100 and then discharged to the outside.
- the control device 13 determines that the current position is not in the exhaust restriction area, the control device 13 controls the exhaust switching valve 21b to be closed and the exhaust switching valve 21c to be opened.
- control apparatus 13 can also acquire the opening / closing signal of the exhaust gas switching valve 21b * 21c by manual, and can control the exhaust gas switching valve 21b * 21c according to the opening / closing signal.
- the method of the urea water injection nozzle 1 is not limited to the present embodiment, and may be an external mixing type urea injection nozzle.
- the urea water injection nozzle 1 includes a double pipe 2, a liquid nozzle 3, an air nozzle 4, and a nut 5.
- the double pipe 2 is a main component of the urea water injection nozzle 1 and constitutes a urea water flow path and a pressurized air flow path.
- the double pipe 2 is arranged such that the downstream side is located inside the exhaust pipe 21 and the upstream side is located outside the exhaust pipe 21.
- the downstream end of the double pipe 2 is arranged upstream of the NOx catalyst 18 arranged inside the exhaust pipe 21.
- the double pipe 2 includes an outer pipe 2b and an inner pipe 2a disposed inside the outer pipe 2b.
- the inner pipe 2a includes a urea water flow path 2c that is a flow path of urea water.
- a gas channel 2d that is a channel for pressurized air is formed in the gap between the inner tube 2a and the outer tube 2b.
- a connecting portion (not shown) that can be connected to the exhaust pipe 21 in a watertight manner is formed in the middle part of the outside of the outer pipe 2b.
- a female screw portion 2e and a male screw portion 2f are formed at the downstream end portion of the inner tube 2a and the downstream end portion of the outer tube 2b.
- a urea water supply port 2g that communicates with the urea water flow path 2c and a gas supply port 2h that communicates with the gas flow path 2d are configured.
- the liquid nozzle 3 is for injecting urea water.
- the liquid nozzle 3 is formed from a substantially cylindrical member and is disposed on the downstream side of the double pipe 2.
- the downstream end of the liquid nozzle 3 is formed in a substantially conical shape with the axial center as the center.
- a substantially columnar convex portion 3a is formed in the central portion of the downstream end portion so as to protrude in the axial direction.
- a male screw portion 3b is formed at the upstream end of the liquid nozzle 3 so as to protrude in the axial direction.
- the urea water flow path 3c is formed in the axial center part of the liquid nozzle 3 so that the whole liquid nozzle 3 may be penetrated to the axial direction from the external thread part 3b to the convex part 3a.
- the urea water flow path 3c is reduced in diameter toward the downstream side in the middle, and is formed so that the inner diameter of the downstream end of the urea water flow path 3c is smaller than the inner diameter of the upstream end of the urea water flow path 3c. .
- the male screw portion 3 b is screwed into the female screw portion 2 e of the double pipe 2.
- the double pipe 2 and the liquid nozzle 3 are connected, and the urea water flow path 3c and the urea water flow path 2c of the double pipe 2 are communicated.
- urea water can be supplied to the urea water flow channel 3c from the urea water flow channel 2c of the double pipe 2.
- the air nozzle 4 is for spraying atomized urea water.
- the air nozzle 4 is formed from a substantially cylindrical member.
- the air nozzle 4 is disposed on the downstream side of the liquid nozzle 3 so that the upstream end contacts the downstream end of the double pipe 2.
- a hole having a substantially conical diameter-reducing portion that is reduced in diameter toward the downstream side in the middle portion is formed in the axial center portion of the air nozzle 4 so as to penetrate from the upstream end toward the downstream end.
- the upstream end of the hole is formed to have an inner diameter to the extent that a compressed air can pass even if the downstream end of the liquid nozzle 3 is inserted.
- a urea water mixing channel 4d is formed at the axial center of the reduced diameter side end of the reduced diameter portion.
- An injection port 4f which is an opening of the mixing channel 4d, is formed at the downstream end of the air nozzle 4.
- a collar portion 4 a is formed on the side surface of the upstream end portion of the air nozzle 4.
- the downstream side of the air nozzle 4 is formed in a substantially bullet shape with the injection port 4f as the apex.
- the side surface (surface) on the downstream side of the air nozzle 4 is within a predetermined range L in a side view (side surface direction of the axis C of the air nozzle 4) from the injection port 4f.
- a surface 4b having a curved surface is formed such that the distance from the mixing flow path 4d decreases as the nozzle 4f approaches the injection port 4f.
- the air nozzle 4 has a surface 4c formed in a predetermined range D centered on the injection port 4f in front view (in the direction of the axis C of the air nozzle 4).
- the surface 4c is formed such that a contour line within a predetermined range D in a side view of the air nozzle 4 is at a constant angle ⁇ with respect to the axis C. That is, the downstream side of the air nozzle 4 is formed in a substantially truncated cone shape with the injection port 4f as the center.
- the air nozzle 4 has an inclined surface having a constant inclination angle ⁇ so as to surround the air nozzle 4 adjacent to the injection port 4f.
- a water repellent coating layer 4 h is formed on the surface 4 b and the surface 4 c of the air nozzle 4.
- the water-repellent coating layer 4h suppresses adhesion of urea water that is a liquid.
- the water repellent coating layer 4h is composed of a ceramic coating layer that can be used even at an exhaust temperature of about 300 ° C to 350 ° C. The exhaust temperature varies greatly depending on the load state of the engine 20. Therefore, the water-repellent coating layer 4h is suitably a ceramic coating layer having a higher heat resistance than a fluorine coating which is a general heat-resistant coating having a heat-resistant temperature of about 250 ° C. Thereby, the air nozzle 4 can remove urea water from the surface easily.
- the air nozzle 4 is connected to the double pipe 2 by a nut 5.
- the downstream end of the liquid nozzle 3 is inserted into the hole on the upstream side of the air nozzle 4.
- a gap is formed between the hole of the air nozzle 4 and the liquid nozzle 3.
- the gap is configured to communicate with the gas channel 2d of the double pipe 2 and the mixing channel 4d as the gas channel 4e.
- urea water is supplied from the urea water flow path 3c of the liquid nozzle 3 to the mixing flow path 4d, and pressurized air is supplied from the gas flow path 4e. That is, the air nozzle 4 is configured to be capable of injecting urea water from the injection port 4f by being screwed into the double pipe 2.
- one or more branch flow paths 4g are formed so as to communicate with the holes of the air nozzle 4 from the side surface. That is, the branch flow path 4g is formed to communicate with the gas flow path 4e from the side surface of the air nozzle 4.
- the branch flow path 4g is formed to communicate with the gas flow path 4e from the side surface of the air nozzle 4.
- pressurized air is supplied to the gas flow path 4e, a part of the pressurized air is discharged to the side surface of the air nozzle 4 through the branch flow path 4g.
- the number of the branch flow paths 4g and the flow path inner diameter of the branch flow paths 4g are determined according to the amount of pressurized air discharged to the side surface of the air nozzle 4.
- the nut 5 fastens the double pipe 2 and the air nozzle 4.
- a stepped portion 5 a that is engaged with the flange portion 4 a of the air nozzle 4 is formed on the inner diameter of the nut 5.
- a female screw portion 5b that is screwed into the male screw portion 2f of the double pipe 2 is formed on the upstream side of the stepped portion 5a.
- the downstream side of the stepped portion 5a is formed with an inner diameter that allows the air nozzle 4 to be inserted without a gap.
- a diameter-expanded portion is formed in a portion on the downstream side of the stepped portion 5 a and facing the branch flow path 4 g of the air nozzle 4.
- the downstream side of the enlarged diameter portion is formed with an inner diameter that is slightly larger than the outer diameter of the air nozzle 4.
- the nut 5 is fixed by screwing the female screw portion 5b to the male screw portion 2f of the double pipe 2 so that the stepped portion 5a is engaged with the flange portion 4a of the air nozzle 4.
- the upstream end of the air nozzle 4 is closely fixed to the downstream end of the double pipe 2.
- a space 5 c in which gas stays is constituted by the enlarged diameter portion of the nut 5 and the side surface of the air nozzle 4.
- the space 5 c is configured to be able to supply pressurized air via the branch flow path 4 g of the air nozzle 4.
- a slit 5d is formed between the nut 5 and the air nozzle 4 on the downstream side of the space 5c. That is, the slit 5 d is configured along the side surface so as to surround the air nozzle 4. Further, the slit 5d communicates with the space 5c. That is, the pressurized air supplied to the space 5c can be discharged from the slit 5d along the side surface of the air nozzle 4 toward the downstream side of the space 5c, which is the same direction as the urea water injection direction. Composed. In this way, the side surface of the air nozzle 4 is formed with a slit 5d that is a side surface discharge port through which pressurized air is discharged.
- the urea water injection nozzle 1 includes the liquid nozzle 3 and the air nozzle 4 that inject urea water at one end (downstream side), and is configured to inject urea water toward the NOx catalyst 18. Is done.
- the configuration of the urea water injection nozzle 1 is particularly limited in the present embodiment, although the urea water flow channel 3c, the gas flow channel 4e, and the mixing flow channel 4d are configured from the liquid nozzle 3 and the air nozzle 4.
- the urea water flow path 3c, the gas flow path 4e, and the mixing flow path 4d should just be comprised, respectively.
- the control unit 13 sets the switching valve 11 to the position Y, so that the urea water is injected into the urea water injection nozzle 1 ( It is supplied to the urea water supply port 2g of the double pipe 2).
- the urea water is the urea water flow path 2c of the double pipe 2 and the urea of the liquid nozzle 3 at a predetermined pressure as indicated by the black arrows in FIG.
- the water is injected from the convex portion 3a of the liquid nozzle 3 to the mixing channel 4d of the air nozzle 4 through the water channel 3c.
- the control unit 13 sets the pressurized air valve 8 to the position W, so that pressurized air is supplied to the gas supply port 2h of the urea water injection nozzle 1 (double pipe 2). Is done.
- the pressurized air is gas from the gas flow path 2d of the double pipe 2 and the air nozzle 4 at a predetermined pressure as indicated by the white arrow in FIG. 4 (a). It is injected into the mixing flow path 4d of the air nozzle 4 through the flow path 4e.
- the urea water collides with the pressurized air inside the mixing flow path 4 d of the air nozzle 4 and is atomized, and is injected from the injection port 4 f of the air nozzle 4.
- Part of the pressurized air supplied to the gas flow path 4e of the air nozzle 4 is supplied to the space 5c through the branch flow path 4g.
- the pressurized air supplied to the space 5c is discharged from the slit 5d toward the downstream side of the air nozzle 4 (on the injection port 4f side) with a uniform pressure.
- the pressurized air discharged from the slit 5d advances so as to wrap the air nozzle 4 along the side surface of the air nozzle 4 due to its viscosity.
- the pressurized air reaches the injection port 4f by traveling on the surface 4b and the surface 4c which are side surfaces of the air nozzle 4 formed in a cannonball shape.
- the control unit 13 sets the position of the switching valve 11 to the position X, so that the urea water injection nozzle 1 ( The supply of urea water to the urea water supply port 2g of the double pipe 2) is stopped. Accordingly, the urea water supply port 2 g of the double pipe 2 is opened to the atmosphere via the first supply flow path 14 and the switching valve 11. Even if urea water adheres to the surface after the pressurized air from the slit 5d is stopped, the air nozzle 4 flows down from the surface due to the effect of the water-repellent coating layer 4h formed on the surface 4b and the surface 4c. Water adhesion is suppressed.
- the air nozzle 4 can be connected to the surface 4b and the surface even if urea water adheres around the injection port 4f.
- the surface 4c formed so as to surround the injection port 4f is caused to flow downward and the adhesion of urea water is suppressed.
- the side surface of the urea water injection nozzle 1 is utilized by utilizing the water repellent effect at the tip of the air nozzle 4 and the discharge force of pressurized air, which is a gas discharged along the surface 4b and the surface 4c of the air nozzle 4.
- the urea water adhering to (surface) is easily removed. Thereby, precipitation and growth of urea in the air nozzle 4 can be suppressed.
- the surface 4c having a slope is formed in the vicinity of the injection port 4f of the urea water injection nozzle 1, the urea water adhering to the vicinity of the injection port 4f is easily removed. Thereby, precipitation and growth of urea in the air nozzle 4 can be suppressed.
- the water repellent effect can be maintained even when placed in high-temperature exhaust. Thereby, precipitation and growth of urea in the air nozzle 4 can be suppressed.
- the present invention can be used for the technology of a urea water injection nozzle in an exhaust purification device.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Nozzles (AREA)
Abstract
Description
2c 尿素水流路
3c 尿素水流路
2d 気体流路
4c 表面
4d 表面
4e 気体流路
4f 噴射口
5d スリット
Claims (3)
- 尿素水流路と気体流路とが構成され、尿素水と気体とが混合されて噴射口から噴射される尿素水噴射ノズルであって、
尿素水噴射ノズルの表面に沿って尿素水の噴射方向と同一の方向に気体が吐出されるように側面吐出口が構成され、尿素水噴射ノズルの表面に撥水コーティング層が形成された尿素水噴射ノズル。 - 前記噴射口に近接するにつれて気体と尿素水とが混合される流路から前記表面までの距離が短くなるように形成され、噴射口から所定の範囲内における尿素水噴射ノズルの側面視での輪郭線が尿素水の噴射方向に対して一定の角度になるように構成される請求項1に記載の尿素水噴射ノズル。
- 前記撥水コーティング層は、セラミックコーティング層である請求項1または請求項2に記載の尿素水噴射ノズル。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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KR1020157035976A KR101740580B1 (ko) | 2013-06-04 | 2014-05-29 | 요소수 분사 노즐 |
CN201480031314.6A CN105247181B (zh) | 2013-06-04 | 2014-05-29 | 尿素水喷射嘴 |
US14/895,325 US10487758B2 (en) | 2013-06-04 | 2014-05-29 | Urea solution spray nozzle |
DK14808320.7T DK3006687T3 (en) | 2013-06-04 | 2014-05-29 | SPRAY NOZE FOR UREA SOLUTION |
EP14808320.7A EP3006687B1 (en) | 2013-06-04 | 2014-05-29 | Urea solution spray nozzle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2013118011A JP6166103B2 (ja) | 2013-06-04 | 2013-06-04 | 尿素水噴射ノズル |
JP2013-118011 | 2013-06-04 |
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WO2014196456A1 true WO2014196456A1 (ja) | 2014-12-11 |
Family
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PCT/JP2014/064321 WO2014196456A1 (ja) | 2013-06-04 | 2014-05-29 | 尿素水噴射ノズル |
Country Status (7)
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US (1) | US10487758B2 (ja) |
EP (1) | EP3006687B1 (ja) |
JP (1) | JP6166103B2 (ja) |
KR (1) | KR101740580B1 (ja) |
CN (1) | CN105247181B (ja) |
DK (1) | DK3006687T3 (ja) |
WO (1) | WO2014196456A1 (ja) |
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CN111206977A (zh) * | 2018-11-21 | 2020-05-29 | 卡特彼勒公司 | 通道式还原剂混合装置 |
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JP6392177B2 (ja) * | 2015-06-29 | 2018-09-19 | 株式会社パウレック | スプレーノズル及びその洗浄方法 |
CN109838295B (zh) * | 2017-11-29 | 2022-12-02 | 博世动力总成有限公司 | 柴油发动机的尾气后处理系统及压力波动幅度确定方法 |
JP6954109B2 (ja) * | 2017-12-27 | 2021-10-27 | いすゞ自動車株式会社 | 尿素水噴射装置 |
US10894237B2 (en) | 2018-11-15 | 2021-01-19 | Caterpillar Inc. | Reductant nozzle with concave impinging surface |
US10953373B2 (en) * | 2018-11-15 | 2021-03-23 | Caterpillar Inc. | Reductant nozzle with radial air injection |
US10888885B2 (en) | 2018-11-15 | 2021-01-12 | Caterpillar Inc. | Reductant nozzle with swirling spray pattern |
US11534728B2 (en) | 2018-11-15 | 2022-12-27 | Caterpillar Inc. | Reductant nozzle with helical channel design |
JP2020176602A (ja) * | 2019-04-22 | 2020-10-29 | 株式会社デンソー | 流体噴射装置及び流体噴射システム |
KR102596285B1 (ko) * | 2020-03-30 | 2023-11-01 | 세메스 주식회사 | 타워 리프트, 타워 리프트 구동 방법 및 기계 판독 가능 매체 |
CN111889247A (zh) * | 2020-08-14 | 2020-11-06 | 广西励领农业科技有限公司 | 一种设有新型喷头结构的喷雾机 |
CN112855313A (zh) * | 2021-03-29 | 2021-05-28 | 河北亚大汽车塑料制品有限公司 | 汽车尿素管的连接工艺 |
US20220364490A1 (en) * | 2021-05-11 | 2022-11-17 | Caterpillar Inc. | Exhaust fluid injector assembly |
DE102022120146A1 (de) * | 2022-08-10 | 2024-02-15 | Glatt Gesellschaft Mit Beschränkter Haftung | Düsenanordnung |
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Also Published As
Publication number | Publication date |
---|---|
EP3006687B1 (en) | 2018-08-01 |
CN105247181B (zh) | 2018-04-03 |
KR101740580B1 (ko) | 2017-06-08 |
EP3006687A4 (en) | 2017-05-24 |
DK3006687T3 (en) | 2018-10-29 |
JP6166103B2 (ja) | 2017-07-19 |
US10487758B2 (en) | 2019-11-26 |
EP3006687A1 (en) | 2016-04-13 |
KR20160008642A (ko) | 2016-01-22 |
JP2014234793A (ja) | 2014-12-15 |
CN105247181A (zh) | 2016-01-13 |
US20160108838A1 (en) | 2016-04-21 |
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