WO2014141513A1 - 排気処理ユニット及び排気処理ユニットを搭載する作業車両 - Google Patents
排気処理ユニット及び排気処理ユニットを搭載する作業車両 Download PDFInfo
- Publication number
- WO2014141513A1 WO2014141513A1 PCT/JP2013/075252 JP2013075252W WO2014141513A1 WO 2014141513 A1 WO2014141513 A1 WO 2014141513A1 JP 2013075252 W JP2013075252 W JP 2013075252W WO 2014141513 A1 WO2014141513 A1 WO 2014141513A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- storage
- refrigerant
- injection device
- engine
- Prior art date
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—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
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2046—Periodically cooling catalytic reactors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
-
- 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
-
- 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]
-
- 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
- F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/11—Adding substances to exhaust gases the substance or part of the dosing system being cooled
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
Definitions
- the present invention relates to an exhaust treatment unit that purifies exhaust from a work vehicle, and a work vehicle equipped with the exhaust treatment unit.
- a diesel engine is generally used as an engine for a work vehicle. Exhaust gas discharged from diesel engines contains a lot of nitrogen oxides. In order to purify the nitrogen oxides, the work vehicle includes an exhaust treatment unit (see, for example, Patent Document 1).
- the exhaust treatment unit includes an injection device and a selective catalytic reduction (SCR) device.
- the injection device injects the reducing agent solution into the exhaust gas upstream of the selective catalyst reduction device. Thereby, the nitrogen oxides of the exhaust discharged from the engine are reduced to nitrogen.
- the injection device is cooled by the refrigerant so as not to be heated by the radiant heat of the engine and the heat of the exhaust (see, for example, Patent Document 2).
- the invention according to Patent Document 2 is driven by electricity so that the temperature of the injection device rises due to the vaporization of the refrigerant, and the reducing agent solution undergoes a chemical change and does not generate fixed deposits (deposits).
- the refrigerant pump circulates the refrigerant between the injection device and the radiator. As a result, the refrigerant is kept at a certain temperature or lower, and the vaporization of the refrigerant is prevented.
- a pump that directly uses engine power is often used as a refrigerant pump.
- Engine-driven pumps cannot be driven when the engine is stopped. Therefore, when the engine is stopped, the circulation of the refrigerant is stopped, the refrigerant is vaporized by the residual heat around the injection device, and the cooling function is lost. When the cooling function of the injection device is lost, the solvent of the reducing agent remaining in the injection device is vaporized, and deposits are generated due to precipitation of solute or alteration of the precipitated solute, thereby impairing the function of the injection device.
- the present invention takes the above problems into consideration.
- An exhaust processing unit is an exhaust processing unit that processes exhaust from an engine, and includes a selective reduction catalyst device, a connecting pipe, an injection device, a first pipe section, and a second pipe section.
- a pipe part, the 1st storage part, the 2nd storage part, and a refrigerant pump are provided.
- the selective catalytic reduction device processes exhaust from the engine.
- the connecting pipe is disposed between the engine and the selective reduction catalyst device.
- the injection device is attached to the connecting pipe and injects the reducing agent into the exhaust gas supplied to the selective catalyst reduction device.
- the first pipe portion guides the refrigerant for cooling the injection device to the injection device.
- the second pipe part discharges the refrigerant from the injection device.
- a 1st storage part is connected with a 1st pipe part above an injection device, and stores a refrigerant.
- a 2nd storage part is connected with a 2nd pipe part above an injection device, and stores a refrigerant.
- the refrigerant pump is driven by obtaining power from the engine, and supplies the refrigerant to the injection device via the first pipe portion.
- the first pipe part extends upward from the first connection part between the first pipe part and the injection device toward the first storage part.
- the second pipe part extends upward from the second connection part between the second pipe part and the injection device toward the second storage part.
- the second storage unit has a larger capacity than the first storage unit, and may be disposed above the first storage unit.
- the exhaust treatment unit may further include one base plate that supports the first storage unit and the second storage unit. And the 1st storage part, the 2nd storage part, and a baseplate are good to be formed as one.
- the second storage unit may include a first sub tank and a second sub tank.
- the first sub tank is connected to one surface of the base plate.
- the second sub tank is connected to the other surface of the base plate.
- the base plate may be provided with an opening that connects between the first sub tank and the second sub tank.
- the first storage unit and the second storage unit may be in communication.
- the exhaust treatment unit may further include one base plate that supports the first storage unit and the second storage unit.
- the first storage part may be connected to one surface of the base plate.
- the second storage unit may be connected to the other surface of the base plate.
- the first storage part, the second storage part, and the base plate may be formed integrally. And it is good for the baseplate to be provided with the hole which connects the 1st storage part and the 2nd storage part.
- the 4th connection part which a 2nd pipe part connects to the 2nd storage part is good in being higher than the 3rd connection part which a 1st pipe part connects to the 1st storage part.
- the lower end of the second reservoir is preferably higher than the lower end of the first reservoir.
- the exhaust treatment unit may further include a third pipe part and a fourth pipe part.
- the third pipe part and the fourth pipe part connect the engine and the first storage part.
- the fourth pipe part connects the engine and the second storage part, and guides the refrigerant discharged from the injection device to the engine.
- the first pipe part and the third pipe part may be connected to the first side surface of the first storage part.
- the 2nd pipe part and the 4th pipe part are good to be connected to the 2nd side of the 2nd storage part.
- the first side surface may be the side surface closest to the injection device among the side surfaces of the first reservoir.
- a 2nd side surface is good in it being the side surface nearest to an injection device among the side surfaces of the 2nd storage part.
- the third pipe part may be connected to the first storage part above the first pipe part.
- the fourth pipe part may be connected to the second storage part above the second pipe part.
- a work vehicle includes the above-described exhaust treatment unit, an engine, and a work implement.
- the engine outputs power.
- the exhaust treatment unit and the work vehicle according to the present invention include a first storage unit and a second storage unit that are located above the injection device and store the refrigerant. And a 1st storage part and a 2nd storage part are connected with an injection device via the 1st pipe part and the 2nd pipe part which extend upward, respectively. For this reason, the refrigerant vaporized in the vicinity of the injection device rises to the first storage section or the second storage section and is cooled, and the refrigerant stays in the first storage section, the second storage section, the first pipe section, or the second pipe section. As a result, thermal convection is generated that descends to the injector.
- the refrigerant pump does not operate when the engine is stopped, the refrigerant in the vicinity of the injection device is prevented from being vaporized. Accordingly, it is possible to prevent deposits from being generated due to the reducing agent that is precipitated when the solvent of the reducing agent solution is vaporized or due to the alteration of the deposited reducing agent.
- FIG. 1 is a left side view of a work vehicle according to an embodiment of the present invention.
- FIG. 2 is a plan view showing a part of the work vehicle according to the embodiment of the present invention.
- FIG. 3 is a plan view showing the internal configuration of the engine compartment.
- FIG. 4 is a side view showing the internal configuration of the engine compartment.
- FIG. 5 is a cross-sectional view of the engine compartment as viewed from the section line VV in FIG.
- FIG. 6 is an enlarged view in which the periphery of the injection device of FIG. 5 is enlarged.
- FIG. 7 is an enlarged perspective view of a storage unit according to an embodiment of the present invention.
- FIG. 8 is a circuit diagram showing the entire flow path of the refrigerant.
- FIG. 9 is a diagram for explaining engine power distribution.
- FIG. 10 is an enlarged perspective view showing a modified example of the storage unit.
- FIG. 1 is a side view of a work vehicle 1 according to an embodiment of the present invention.
- FIG. 2 is a plan view showing a part of the work vehicle 1 according to an embodiment of the present invention.
- the front-rear direction means the front-rear direction of the work vehicle 1.
- the front-rear direction means the front-rear direction viewed from an operator seated in the cab (cab) 7.
- the left-right direction or the side means the vehicle width direction of the work vehicle 1.
- the left-right direction, the vehicle width direction, or the side means the left-right direction viewed from the above-described operator.
- the work vehicle 1 is, for example, a bulldozer.
- Work vehicle 1 includes a work implement 2, a traveling device 3, and a vehicle main body 4.
- the work machine 2 includes a blade 5 and a hydraulic cylinder 6.
- the blade 5 is disposed in front of the vehicle body 4.
- the hydraulic cylinder 6 is driven by hydraulic pressure generated by a hydraulic pump (not shown), and moves the blade 5 up and down.
- the traveling device 3 is a device for traveling the vehicle, and has a pair of crawler belts 3a.
- the work vehicle 1 travels by driving the crawler belt 3a.
- the vehicle main body 4 has a cab (operating cab) 7 and an engine compartment 8.
- the cab 7 is arranged behind the engine room 8.
- the cab 7 includes a seat and an operation device (not shown).
- the engine compartment 8 is disposed in front of the cab 7. Since the engine compartment 8 is sandwiched between the pair of crawler belts 3a, the width of the engine compartment 8 is limited within the interval between the pair of crawler belts 3a.
- the engine compartment 8 has a vehicle body frame (not shown), a roof portion 11, a first side wall portion 12, and a second side wall portion 13. In the following description, the first side wall portion 12 and the second side wall portion 13 are collectively referred to as a side wall portion.
- the roof part 11 covers the upper part of the engine room 8.
- the rear part of the roof part 11 has a tapered shape so that the lateral width becomes smaller toward the rear side.
- a removable engine hood 14 is provided at the rear of the roof portion 11.
- the first side wall portion 12 is provided along the front-rear direction and covers the left side of the engine compartment 8.
- the second side wall portion 13 is provided along the front-rear direction and covers the right side of the engine compartment 8.
- the first side wall portion 12 and the second side wall portion 13 have symmetrical shapes with respect to the center line CL along the front-rear direction of the work vehicle 1, and are separated in the vehicle width direction.
- the intermediate line CL is a reference line passing through the middle in the vehicle width direction between the first side wall portion 12 and the second side wall portion 13.
- the engine hood 14 covers the upper part of the engine room 8. That is, it covers the exhaust processing unit 40 and the engine 31 described later.
- the engine hood 14 is disposed in front of the cab 7. In other words, the cab 7 is disposed behind the engine hood 14.
- the engine hood 14 has a symmetrical shape with respect to the center line CL along the front-rear direction of the work vehicle 1.
- the engine hood 14 has at least an upper surface 140.
- the upper surface 140 has a convex portion 141 and a base portion 144.
- the convex portion 141 is located at the rear portion of the upper surface 140.
- the convex portion 141 is located at the center of the upper surface 140 in the vehicle width direction.
- the convex portion 141 has a substantially trapezoidal shape in a plan view of the vehicle.
- the convex portion 141 is arranged so that the longitudinal direction of the convex portion 141 is along the vehicle front-rear direction.
- the convex portion 141 is arranged so that two bottom sides constituting the trapezoidal shape of the convex portion 141 are along the vehicle width direction.
- the convex part 141 has a convex part upper surface 142 and a convex part inclined surface 143.
- the convex surface 142 is a horizontal plane (see FIG. 4).
- the convex inclined surface 143 is a plane that is inclined from the convex upper surface 142 toward the base 144. Since the base portion 144 is inclined toward the front of the vehicle, the lateral width of the convex inclined surface 143 becomes longer toward the front of the vehicle.
- the base portion 144 is formed integrally with the convex portion 141 and is disposed below the convex portion 141.
- the base 144 is inclined forward of the vehicle (see FIGS. 1 and 4). In the vehicle plan view, the length in the vehicle width direction of the base portion 144 becomes shorter toward the rear of the vehicle.
- FIG. 3 is a plan view showing the internal configuration of the engine compartment 8.
- FIG. 4 is a side view showing the internal configuration of the engine compartment 8.
- FIG. 5 is a cross-sectional view of the engine compartment 8 as seen from the section line VV in FIG. FIG. 4 is shown excluding some components of FIG. FIG. 5 is shown excluding some components of FIG.
- the engine hood 14 is displayed with the dashed-two dotted line.
- an engine 31, an air cleaner 32, a cooler 15 (see FIG. 7), and an exhaust treatment unit 40 are accommodated. That is, the work vehicle 1 further includes the engine 31, the cooler 15, and the exhaust treatment unit 40.
- the engine 31 is, for example, a diesel engine, and outputs power for driving the above-described hydraulic pump, a refrigerant pump 75 (see FIG. 8) described later, and the traveling device 3.
- the engine 31 is disposed below the engine hood 14. Further, the engine 31 is disposed below the exhaust treatment unit 40 and the air cleaner 32. As shown in FIG. 4, the air cleaner 32 is disposed in front of the exhaust treatment unit 40 in the engine chamber 8.
- An intake pipe 8 b (see FIGS. 1 and 2) that protrudes from the engine hood 14 is connected to the air cleaner 32.
- the radiator 15 (see FIG. 7) is disposed in front of the air cleaner 32 in the engine compartment 8.
- the radiator 15 is a device that cools the coolant that circulates between the engine 31 and an injection device 49 described later.
- the radiator 15 is configured to allow air to pass in the front-rear direction.
- the exhaust treatment unit 40 is disposed below the engine hood 14 and above the engine 31.
- the exhaust treatment unit 40 includes a first exhaust treatment device 41, a second exhaust treatment device 42, a second connection pipe 43, and a bracket 60.
- the first exhaust treatment device 41 is, for example, a diesel particulate filter device, and processes exhaust from the engine 31.
- the first exhaust treatment device 41 collects particulate matter contained in the exhaust with a filter.
- the first exhaust treatment device 41 incinerates the collected particulate matter with a heater attached to the filter.
- the first exhaust treatment device 41 has a substantially cylindrical outer shape. As shown in FIG. 5, the first exhaust treatment device 41 is disposed below the engine hood 14 and above the engine 31. As shown in FIG. 3, the first exhaust treatment device 41 is arranged such that its central axis Ax1 is along the vehicle longitudinal direction. That is, the first exhaust treatment device 41 is arranged such that its longitudinal direction is along the vehicle front-rear direction. Therefore, the first exhaust treatment device 41 is arranged so that the central axis Ax1 thereof is parallel to the crankshaft of the engine 31.
- the second exhaust treatment device 42 is, for example, a selective reduction catalyst device, and processes exhaust from the engine 31.
- the second exhaust treatment device 42 hydrolyzes the reducing agent and selectively reduces nitrogen oxides NOx.
- the second exhaust treatment device 42 has a substantially cylindrical outer shape. As shown in FIGS. 4 and 5, the second exhaust treatment device 42 is disposed below the engine hood 14 and above the engine 31. As shown in FIG. 3, the second exhaust treatment device 42 is arranged such that the central axis Ax2 is along the vehicle front-rear direction. That is, the second exhaust treatment device 42 is arranged such that its longitudinal direction is along the vehicle front-rear direction. Therefore, the second exhaust treatment device 42 is arranged so that the central axis Ax2 thereof is parallel to the crankshaft of the engine 31. Further, the second exhaust treatment device 42 is arranged such that the central axis Ax2 thereof is parallel to the central axis Ax1 of the first exhaust treatment device 41. Furthermore, as shown in FIG. 5, the first exhaust treatment device 41 and the second exhaust treatment device 42 are arranged close to each other.
- the first exhaust treatment device 41 has a first connection port 44.
- the work vehicle 1 includes a first connection pipe 51.
- the first connection pipe 51 connects the engine 31 and the first exhaust treatment device 41.
- the first connecting pipe 51 has a first bent portion 53 and a bellows portion 54. As shown in FIG. 3, the first bent portion 53 connects the bellows portion 54 and the first connection port 44.
- the first connection pipe 51 is connected to the engine 31 at the end connected to the first connection port 44 and the other end.
- the bellows portion 54 has a bellows shape and can be expanded and contracted, and is configured by connecting a plurality of bellows-type expansion and contraction joints.
- the bellows portion 54 is disposed substantially along the vertical direction.
- the first exhaust treatment device 41 has a second connection port 45.
- the second connection port 45 projects obliquely upward and toward the second exhaust treatment device 42 side.
- the second exhaust treatment device 42 has a third connection port 46.
- the third connection port 46 projects obliquely upward and toward the first exhaust treatment device 41 side.
- the exhaust treatment unit 40 has a second connection pipe 43. As shown in FIG. 3, one end of the second connection pipe 43 is connected to the second connection port 45 of the first exhaust treatment device 41. The other end of the second connection pipe 43 is connected to the third connection port 46 of the second exhaust treatment device 42. That is, the second connection pipe 43 is a relay connection pipe that connects the first exhaust treatment device 41 and the second exhaust treatment device 42. As shown in FIG. 5, the second connection pipe 43 is disposed above the first exhaust treatment device 41 and the second exhaust treatment device 42. And the convex part 141 protrudes above the 2nd connection pipe 43. FIG. As shown in FIG. 3, the second connection pipe 43 is disposed so as to overlap the first exhaust treatment device 41 and the second exhaust treatment device 42 in the vehicle plan view.
- the second connection pipe 43 includes a main pipe portion 57, a first connection portion 58, and a second connection portion 59.
- the main pipe portion 57 has a substantially cylindrical outer shape.
- the main pipe portion 57 is located above the first exhaust treatment device 41 and the second exhaust treatment device 42.
- the central axis Ax3 of the main pipe portion 57 is located above the cylindrical upper end of the first exhaust treatment device 41 and the cylindrical upper end of the second exhaust treatment device 42. Therefore, the upper end of the main pipe portion 57 is located above the cylindrical upper end of the first exhaust treatment device 41 and the cylindrical upper end of the second exhaust treatment device 42.
- the main pipe portion 57 is arranged such that the central axis Ax3 is along the vehicle front-rear direction. That is, the main pipe portion 57 is arranged such that its longitudinal direction is along the vehicle front-rear direction. Therefore, the main pipe portion 57 is arranged so that the central axis Ax3 thereof is parallel to the crankshaft of the engine 31. Further, the main pipe portion 57 is disposed such that the central axis Ax3 thereof is parallel to the central axis Ax1 of the first exhaust treatment device 41 and the central axis Ax2 of the second exhaust treatment device 42.
- the length of the second connection pipe 43 in the direction of the central axis Ax3 is substantially the same as the lengths of the first exhaust treatment device 41 and the second exhaust treatment device 42.
- the first connection part 58 connects the main pipe part 57 and the second connection port 45. That is, the first connection part 58 connects the main pipe part 57 and the first exhaust treatment device 41.
- the second connection part 59 connects the main pipe part 57 and the third connection port 46. That is, the second connection part 59 connects the main pipe part 57 and the second exhaust treatment device 42.
- An injection device 49 is attached to the first connection portion 58. That is, the exhaust treatment unit 40 further includes the injection device 49.
- the injection device 49 injects the reducing agent into the exhaust gas supplied to the second exhaust treatment device 42 through the second connection pipe 43.
- the reducing agent is, for example, an aqueous solution of urea (hereinafter also referred to as urea water).
- the injected urea water is hydrolyzed by exhaust heat into ammonia, and the ammonia is supplied to the second exhaust treatment device 42 through the second connection pipe 43 together with the exhaust gas, and acts as a reducing agent.
- the reducing agent solution injected by the injection device 49 is simply referred to as a reducing agent.
- the second exhaust treatment device 42 has a fourth connection port 47.
- the fourth connection port 47 protrudes obliquely upward.
- the work vehicle 1 includes an exhaust pipe 8a.
- the exhaust pipe 8 a is connected to the fourth connection port 47.
- the upper portion of the exhaust pipe 8 a protrudes upward from the engine hood 14.
- the exhaust pipe 8 a and the intake pipe 8 b are eccentric to the first side wall 12 side with respect to the center line CL along the front-rear direction of the work vehicle 1.
- the engine 31, the first connection pipe 51, the first exhaust treatment device 41, the second connection pipe 43, the second exhaust treatment device 42, and the exhaust pipe 8a are sequentially connected in series. Therefore, the exhaust from the engine 31 passes through the first connection pipe 51 and is sent to the first exhaust treatment device 41. In the first exhaust treatment device 41, the particulate matter is mainly reduced from the exhaust. Next, the exhaust gas passes through the second connection pipe 43 and is sent to the second exhaust treatment device 42. In the second exhaust treatment device 42, NOx is mainly reduced. Thereafter, the cleaned exhaust gas is discharged to the outside through the exhaust pipe 8a.
- the first exhaust treatment device 41 and the second exhaust treatment device 42 are attached to the bracket 60.
- the bracket 60 includes a first support portion 61 that supports the first exhaust treatment device 41 and a second support portion 62 that supports the second exhaust treatment device 42.
- the first exhaust treatment device 41 is fixed on the bracket 60 by attaching a U-shaped bolt to the first support portion 61.
- the second exhaust treatment device 42 is fixed on the bracket 60 by attaching a U-shaped bolt to the second support portion 62.
- the bracket 60 is supported by the engine 31 via a plurality of support members (not shown). That is, the first exhaust treatment device 41, the second exhaust treatment device 42, and the second connection pipe 43 are supported by the engine 31 through the bracket 60.
- FIG. 6 is an enlarged view in which the periphery of the injection device 49 of FIG. 5 is enlarged.
- the injection device 49 has a refrigerant flow path 49a through which a refrigerant for cooling the main body of the injection device 49 flows.
- a first pipe portion 71 and a second pipe portion 72, which will be described later, are connected to the refrigerant flow path 49a, and the injection device 49 is cooled as the refrigerant flows through the refrigerant flow path.
- the refrigerant is generally water.
- the exhaust treatment unit 40 further includes a first pipe part 71, a second pipe part 72, a first storage part 81, and a second storage part 82.
- the 1st pipe part 71 is connected with the injection apparatus 49 in the 1st connection part 71a which is the end.
- the 1st pipe part 71 is connected with the 1st storage part 81 in the 3rd connection part 71b which is the other end.
- the first pipe portion 71 extends upward from the first connection portion 71 a toward the first storage portion 81. More specifically, the first pipe portion 71 extends obliquely upward from the first connection portion 71a toward the first storage portion 81.
- the 2nd pipe part 72 is connected with the injection apparatus 49 in the 2nd connection part 72a which is the end.
- the 2nd pipe part 72 is connected with the 2nd storage part 82 in the 4th connection part 72b which is the other end.
- the second pipe part 72 extends upward from the second connection part 72 a toward the second storage part 82. More specifically, the second pipe portion 72 extends obliquely upward from the second connection portion 72a toward the second storage portion 82.
- the refrigerant flow path 49a can be divided into a first flow path 49b going from the lowest point B to the first pipe part 71 and a second flow path 49c going from the lowest point B to the second pipe part 72. .
- neither the first flow path 49b nor the second flow path 49c has a horizontal portion. Therefore, the refrigerant vaporized in the vicinity of the injection device 49 as the temperature of the injection device 49 rises (hereinafter, such a refrigerant is referred to as a bubble) does not stay in the refrigerant flow path 49a, and the first pipe portion 71. Or, it goes to the first storage part 81 or the second storage part 82 via the second pipe part 72.
- the 2nd flow path 49c is longer than the 1st flow path 49b. Therefore, there are more bubbles toward the second reservoir 82 than bubbles toward the first reservoir 81.
- the 1st storage part 81 is connected with the 1st pipe part 71 above the injection device 49, and stores a refrigerant
- the 2nd storage part 82 is connected with the 2nd pipe part 72 above the injection apparatus 49, and stores a refrigerant
- the first storage part 81 and the second storage part 82 are supported by a base plate 83.
- the 1st storage part 81, the 2nd storage part 82, and the baseplate 83 are integrally formed. What is integrally formed in this way is called a storage unit 80.
- FIG. 7 is an enlarged perspective view of the storage unit 80 according to an embodiment of the present invention.
- the inside of the 1st storage part 81 and the 2nd storage part 82 is displayed with the dotted line.
- the 1st storage part 81 is a substantially rectangular parallelepiped shape
- the 2nd storage part 82 is quadrangular prism shape whose shape of the bottom face which is a side surface in FIG. 7 is a substantially parallelogram.
- the second reservoir 82 has a larger capacity than the first reservoir 81.
- the second storage unit 82 is disposed above the first storage unit 81.
- the lower surface of the second reservoir 82 is in contact with the upper surface of the first reservoir 81.
- the second storage unit 82 includes a first sub tank 82 a connected to one surface of the base plate 83 and a second sub tank 82 b connected to the other surface of the base plate 83.
- the second sub tank 82b is adjacent to the first reservoir 81. That is, the second sub tank 82b is connected to the same surface as the surface of the base plate 83 to which the first storage unit 81 is connected.
- the first sub tank 82a is connected to the surface opposite to the surface of the base plate 83 to which the first storage portion 81 is connected.
- the first sub tank 82 a is connected to the surface of the first side base plate 83 facing the second connection pipe 43.
- the second sub tank 82b and the first reservoir 81 are connected to the surface of the base plate 83 on the second side opposite to the first side.
- the base plate 83 is provided with an opening 83a that connects the first sub tank 82a and the second sub tank 82b. That is, the 2nd storage part 82 forms one storage part with which the 1st sub tank 82a and the 2nd sub tank 82b are connected.
- the 2nd storage part 82 contains the 1st inclined surface 82c and the 2nd inclined surface 82d.
- the first inclined surface 82 c is an inclined surface corresponding to the cylindrical side surface of the second connection pipe 43. That is, the first inclined surface 82 c is inclined so as not to contact the cylindrical side surface of the second connecting pipe 43.
- the point PQRS in FIG. 5 corresponds to the point PQRS in FIG.
- the second inclined surface 82d is an inclined surface corresponding to the convex inclined surface 143. That is, the second inclined surface 82d is inclined so as not to contact the convex inclined surface 143. Further, as shown in FIG.
- a part of the second storage part 82 is included in the internal space of the convex part 141. That is, at least one of a part of the 1st storage part 81 or a part of the 2nd storage part 82 is contained in the internal space of the convex part 141.
- the base plate 83 extends downward while being bent from the vicinity of the lower end of the first storage portion 81. More specifically, the base plate 83 is bent substantially perpendicularly to the first bent portion 83b and a first bent portion 83b that bends from the vicinity of the lower end of the first storage portion 81 so as to approach the side surface of the second connecting pipe 43. And a second bent portion 83c.
- the base plate 83 may further include a rib 84 connected to the first bent portion 83b and the second bent portion 83c.
- the base plate 83 may further include a rib connected to the first bent portion 83b and the lower end of the first sub tank 82a.
- a support member 86 which will be described later, is provided with a mounting hole 85 for connection with a bolt (see FIG. 4).
- the support member 86 is attached to the flange 42a of the second exhaust treatment device 42 by bolts.
- the support member 86 has three surfaces that are perpendicular to each other, and is connected to the flange 42a on one surface and to the base plate 83 (specifically, the second bent portion 83c) on the other surface, The remaining surface is in contact with the lower end of the base plate 83.
- the first storage portion 81 is connected to the third pipe portion 73 connected to the engine 31, and the second storage portion 82 is connected to the engine 31.
- the pipe part 74 is connected. That is, the exhaust treatment unit 40 further includes a third pipe part 73 and a fourth pipe part 74.
- the 3rd pipe part 73 is connected with the 1st storage part 81 in the 5th connection part 73b.
- the 4th pipe part 74 is connected with the 2nd storage part 82 in the 6th connection part 74b.
- the fifth connection portion 73b is located above the third connection portion 71b. That is, the third pipe part 73 is connected to the first storage part 81 above the first pipe part 71.
- the sixth connection portion 74b is located above the fourth connection portion 72b. That is, the fourth pipe portion 74 is connected to the second storage portion 82 above the second pipe portion 72.
- the third connection portion 71 b and the fifth connection portion 73 b are connected to a common side surface 81 e of the first storage portion 81.
- the side surface 81 e is the side surface closest to the injection device 49 among the side surfaces of the first storage portion 81.
- the distance between each side surface of the first storage unit 81 and the injection device 49 is defined by the distance between the center position of each side surface and the center position of the injection device 49.
- the fourth connection part 72 b and the sixth connection part 74 b are connected to the common side surface 82 e of the second storage part 82.
- the side surface 82 e is the side surface closest to the injection device 49 among the side surfaces of the second reservoir 82.
- the distance between each side surface of the second reservoir 82 and the injection device 49 is defined by the distance between the center position of each side surface and the center position of the injection device 49.
- FIG. 8 is a circuit diagram showing the entire flow path of the refrigerant. Based on FIG. 8, main flow paths of the refrigerant related to the present embodiment will be described.
- the work vehicle 1 mainly includes a first refrigerant pipe 91, a second refrigerant pipe 92, a third refrigerant pipe 93, a refrigerant supply pipe 94, and a refrigerant return pipe 95.
- the refrigerant supply pipe 94 includes the first pipe portion 71 and the third pipe portion 73 described above.
- the refrigerant return pipe 95 includes the second pipe part 72 and the fourth pipe part 74 described above.
- the first refrigerant pipe 91 connects the radiator 15 and the water jacket of the cylinder block 31a, and sends the refrigerant cooled by the radiator 15 to the water jacket of the cylinder block 31a.
- a refrigerant pump 75 is connected in the middle of the first refrigerant pipe 91. The refrigerant pump 75 is driven by obtaining power from the engine 31 and supplies the refrigerant to the injection device 49 through the refrigerant supply pipe 94 (the third pipe portion 73 and the first pipe portion 71) and the first storage portion 81.
- engine 31 includes a first power take-off (PTO) and a refrigerant pump 75.
- the output of the engine 31 is transmitted to a first PTO 33 and a second power take-off (PTO) 34 connected to the engine.
- the first PTO 33 drives the refrigerant pump 75 by the transmitted output.
- the refrigerant pump 75 stops as the engine 31 stops.
- the output transmitted to the second PTO 34 is transmitted to a hydraulic pump 35 for driving the cooling fan and a power train 36 for driving the traveling device 3.
- the second refrigerant pipe 92 connects the water jacket of the cylinder block 31a and the refrigerant flow path of the turbocharger 31c, and sends the refrigerant from the water jacket of the cylinder block 31a to the refrigerant flow path of the turbocharger 31c.
- a refrigerant supply pipe 94 branches from the second refrigerant pipe 92.
- the refrigerant supply pipe 94 connects the second refrigerant pipe 92 and the refrigerant flow path of the injection device 49, and the injection device from the second refrigerant pipe 92 (specifically, the first pipe portion 71 and the third pipe portion 73).
- the refrigerant is sent to 49 refrigerant flow paths.
- the third pipe portion 73 guides the refrigerant for cooling the injection device 49 to the first storage portion 81. Then, the first pipe portion 71 guides the refrigerant for cooling the injection device 49 to the injection device 49. Thereby, the injection device 24 is cooled.
- the refrigerant return pipe 95 connects the refrigerant flow path (specifically, the second pipe part 72 and the fourth pipe part 74) of the injection device 49 and the first refrigerant pipe 91, and from the refrigerant flow path of the injection device 49.
- the refrigerant is sent to the first refrigerant pipe 91.
- the refrigerant after cooling the injection device 49 is discharged from the refrigerant flow path of the injection device 49. That is, the second pipe portion 72 discharges the refrigerant from the injection device 49.
- the fourth pipe portion 74 guides the refrigerant discharged from the injection device 49 to the engine 31.
- the exhaust treatment unit 40 and the work vehicle 1 according to the present embodiment have the following characteristics.
- the exhaust treatment unit 40 and the work vehicle 1 include a first storage unit 81 and a second storage unit 82 that are located above the injection device 49 and store the refrigerant. And the 1st storage part 81 and the 2nd storage part 82 are connected with injection device 49 via the 1st pipe part 71 and the 2nd pipe part 72 which extend upward from injection device 49, respectively. Therefore, the refrigerant vaporized in the vicinity of the injection device 49 rises to the first reservoir 81 or the second reservoir 82 and is cooled, and the first reservoir 81, the second reservoir 82, the first pipe portion 71, or the second reservoir. Thermal convection in which the refrigerant staying in the pipe portion 72 descends to the injection device 49 is generated.
- the refrigerant pump 75 does not operate when the engine 31 is stopped, the refrigerant in the vicinity of the injection device 49 is suppressed. This suppresses the generation of deposits by the reducing agent. Moreover, it can prevent that the injection device 49 becomes excessively high temperature.
- the 1st storage part 81, the 2nd storage part 82, and the baseplate 83 are integrally formed. Therefore, the attachment work of the 1st storage part 81 and the 2nd storage part 82 becomes easy.
- the second storage part 82 includes a first sub tank 82a connected to one surface of the base plate 83 and a second sub tank 82b connected to the other surface of the base plate 83.
- the base plate 83 is provided with an opening 83a that connects the first sub tank 82a and the second sub tank 82b.
- the second storage part 82 having a considerably larger capacity than the first storage part 81 is arranged so that the capacity on one side of the base plate 83 is substantially equal to the capacity on the other side. Therefore, the second reservoir 82 is stably supported by the base plate 83.
- the fourth connection part 72b where the second pipe part 72 is connected to the second storage part 82 is above the third connection part 71b where the first pipe part 71 is connected to the first storage part 81. Therefore, when the refrigerant pump 75 is stopped, the liquid refrigerant in the second reservoir 82 flows more easily into the injection device 49 than the liquid refrigerant in the first reservoir 81. As a result, an excessive temperature rise of the injection device 49 after the engine is stopped is suppressed, and deposit generation in the injection device 49 is suppressed.
- the lower end of the second reservoir 82 is above the lower end of the first reservoir 81. It is more desirable if the lower end of the second reservoir 82 is above the upper end of the first reservoir 81.
- the first pipe part 71 and the third pipe part 73 are connected to the side surface 81e of the first storage part 81.
- the second pipe part 72 and the fourth pipe part 74 are connected to the side surface 82 e of the second storage part 82. This facilitates attachment, removal, and handling of the first pipe portion 71 to the fourth pipe portion 74.
- the side surface 81e is the side surface closest to the injection device 49 among the side surfaces of the first reservoir 81.
- the side surface 82 e is the side surface closest to the injection device 49 among the side surfaces of the second reservoir 82.
- the third pipe part 73 is connected to the first storage part 81 above the first pipe part 71.
- the fourth pipe part 74 is connected to the second storage part 82 above the second pipe part 72.
- the refrigerant pump 75 is driven by obtaining power from the engine 31. This eliminates the need to newly install a power source other than the engine 31. Further, the exhaust treatment unit 40 according to the present embodiment is particularly effective when the refrigerant is supplied using the refrigerant pump 75 that stops together with the stop of the engine 31 in this way.
- At least one of a part of the first storage part 81 or a part of the second storage part 82 is included in the internal space of the convex part 141. Accordingly, the storage unit 80 protruding above the engine 31 can be disposed in the convex portion 141, and the height of the base portion 144 can be lowered. As a result, a wide front view of the operator of the work vehicle 1 can be secured.
- FIG. 10 is an enlarged perspective view showing a modified example 80 a of the storage unit 80.
- the inside of the 1st storage part 81 and the 2nd storage part 82 is displayed with the dotted line.
- the 1st storage part 81 and the 2nd storage part 82 are substantially rectangular parallelepiped shapes.
- the size of the first reservoir 81 is substantially equal to the size of the second reservoir 82.
- the upper end of the first reservoir 81 is above the lower end of the second reservoir 82.
- the first reservoir 81 is connected to one surface of the base plate 83, and the second reservoir 82 is connected to the other surface of the base plate 83.
- the second storage portion 82 is connected to the surface of the first side base plate 83 facing the second connection pipe 43.
- the first reservoir 81 is connected to the surface of the base plate 83 on the second side opposite to the first side.
- the base plate 83 is provided with a communication hole 87 that allows the first storage portion 81 and the second storage portion 82 to communicate with each other. That is, the 1st storage part 81 and the 2nd storage part 82 are connecting.
- the vaporized refrigerant accumulates in the second reservoir 82 and the height of the liquid refrigerant becomes lower than the height of the first reservoir 81.
- the liquid refrigerant flows in from the one reservoir 81. As a result, the amount of refrigerant in the second reservoir can be substantially increased.
- the first storage part 81 is connected to one surface of the base plate 83, and the second storage part 82 is connected to the other surface of the base plate 83.
- the 1st storage part 81 and the 2nd storage part 82 are substantially the same magnitude
- the first storage part 81, the second storage part 82, and the base plate 83 are integrally formed.
- the base plate 83 is provided with a communication hole 87 that allows the first storage portion 81 and the second storage portion 82 to communicate with each other. Therefore, the attachment work of the 1st storage part 81, the 2nd storage part 82, and a communication part becomes easy.
- the size of the communication hole is small so that the refrigerant in the first reservoir 81 and the refrigerant in the second reservoir 82 are not mixed much. Is provided small.
- the weight balance is different because the first storage portion 81 is larger than the storage unit 80, so the number of ribs 84a is one, and the shape of the mounting hole 85a is also elliptical. ing.
- the first storage unit 81, the second storage unit 82, and the base plate 83 are integrally formed. 81 and the 2nd storage part 82 may be formed separately. In this case, in the modified example 80a described above, instead of the communication hole 87, the first reservoir 81 and the second reservoir 82 may be connected by a thin tube.
- the first storage unit 81 and the second storage unit 82 are tanks is illustrated, but the present invention is not limited thereto.
- the first storage part 81 or the second storage part 82 is formed by increasing the diameter of a part of the refrigerant supply pipe 94 and the refrigerant return pipe 95 and retaining the refrigerant inside the thickened pipe. Also good.
- first tube portion 71 and the second tube portion 72 extend obliquely upward from the injection device 49, but may extend vertically upward from the injection device 24.
- first tube portion 71 and the second tube portion 72 are supported only by the storage unit 80, but the first tube portion 71 and the second tube portion 72 are further utilized by using a separate support member. It may be supported so as to extend obliquely upward.
- the support member 86 is fixed to the flange 42a of the second exhaust treatment device 42, but the fixing position of the support member 86 is not limited to this.
- the support member 86 may be fixed to the second connection pipe 43, the vehicle body frame, the engine hood 14, or the like.
- the shape of the support member 86 may be other shapes.
- the fixing method of the support member 86 and the storage unit 80 may be other means (for example, hook, welding, etc.) other than bolts.
- FIG. 5 shows an example in which a part of the storage unit 80 is included in the internal space of the convex portion 141, but the entire storage unit 80 may not be included in the internal space of the convex portion 141. That is, the storage unit 80 may be disposed below the convex portion 141.
- the configuration of the exhaust treatment unit 40 is not limited to the above configuration.
- the first exhaust treatment device 41 may not be a diesel particulate filter device, but may be another exhaust treatment device such as an oxidation catalyst for diesel (Diesel Oxidation Catalyst: DOC).
- the first exhaust treatment device 41 and the second exhaust treatment device 42 may be arranged at positions different from the above.
- the first exhaust treatment device 41 and the second exhaust treatment device 42 are not limited to a cylindrical shape or the like, and may have other shapes such as an elliptical shape or a rectangular parallelepiped shape.
- the positions of the first connecting pipe 51, the exhaust pipe 8a, the intake pipe 8b, and the air cleaner 32 may be arranged at positions different from the above.
- the layout in the engine room 8 may be reversed to the above-described layout.
- the first exhaust treatment device 41 may be disposed on the left side in the vehicle width direction
- the second exhaust treatment device 42 may be disposed on the right side.
- the attachment positions of the injection device 49, the first connection pipe 51, and the second connection pipe 43 are also changed accordingly.
- a bulldozer has been described as an example of the work vehicle 1, but the work vehicle 1 is not limited to a bulldozer.
- the work vehicle 1 is a hydraulic excavator, a wheel loader, or a motor grader, the present invention can be similarly applied.
- the present invention it is possible to provide a work vehicle in which the refrigerant near the injection device is prevented from being vaporized even when the refrigerant pump does not operate when the engine is stopped.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Exhaust Gas After Treatment (AREA)
- Component Parts Of Construction Machinery (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
図1は、本発明の一実施形態に係る作業車両1の側面図である。図2は、本発明の一実施形態に係る作業車両1の一部を示す平面図である。なお、以下の説明において、前後方向とは、作業車両1の前後方向を意味する。言い換えれば、前後方向とは、キャブ(運転室)7に着座したオペレータから見た前後方向を意味する。また、左右方向、或いは、側方とは、作業車両1の車幅方向を意味する。言い換えれば、左右方向、車幅方向、或いは、側方とは、上述のオペレータから見た左右の方向を意味するものとする。なお、本実施形態では、作業車両1は、例えば、ブルドーザである。
図3は、エンジン室8の内部構成を示す平面図である。図4は、エンジン室8の内部構成を示す側面図である。図5は、図1の切断面線V-Vから見たエンジン室8の断面図である。図4は、図1の一部の構成部品を除いて表示している。図5は、図4の一部の構成部品を除いて表示している。また、図4及び図5では、エンジンフード14が二点鎖線で表示されている。エンジン室8内には、エンジン31と、エアクリーナ32と、冷却器15(図7参照)と、排気処理ユニット40とが収容されている。つまり、作業車両1は、エンジン31と冷却器15と排気処理ユニット40とをさらに備える。
図6は、図5の噴射装置49の周辺を拡大した拡大図である。図6に示すように、噴射装置49は、噴射装置49本体を冷却するための冷媒が流れる冷媒流路49aを有する。冷媒流路49aには、後述する第1管部71及び第2管部72が接続され、冷媒流路内を冷媒が流れることで噴射装置49は冷却される。ここで、冷媒とは一般的には水である。
本実施形態に係る排気処理ユニット40及び作業車両1は、以下の特徴を有する。
以上、本発明の一実施形態について説明したが、本発明は上記実施形態に限定されるものではなく、発明の要旨を逸脱しない範囲で種々の変更が可能である。
Claims (14)
- エンジンからの排気を処理する排気処理ユニットであって、
前記エンジンからの排気を処理する選択還元触媒装置と、
前記エンジンと前記選択還元触媒装置との間に配設される接続管と、
前記接続管に取り付けられ、前記選択触媒還元装置へ供給される排気中に還元剤を噴射する噴射装置と、
前記噴射装置を冷却するための冷媒を前記噴射装置に導く第1管部と、
前記噴射装置から前記冷媒を排出するための第2管部と、
前記噴射装置の上方において前記第1管部と接続し、冷媒を貯留する第1貯留部と、
前記噴射装置の上方において前記第2管部と接続し、冷媒を貯留する第2貯留部と、
前記エンジンから動力を得て駆動され、前記第1管部を介して、冷媒を前記噴射装置に供給する冷媒ポンプと、
を備え、
前記第1管部は、前記第1管部と前記噴射装置との第1接続部から前記第1貯留部に向かって上方に伸び、
前記第2管部は、前記第2管部と前記噴射装置との第2接続部から前記第2貯留部に向かって上方に伸びる、
排気処理ユニット。 - 前記第2貯留部は、前記第1貯留部より容量が大きく、前記第1貯留部の上方に配置される、請求項1に記載の排気処理ユニット。
- 前記第1貯留部と前記第2貯留部とを支持する1つのベースプレートをさらに備え、
前記第1貯留部と前記第2貯留部と前記ベースプレートとは一体として形成される、請求項2に記載の排気処理ユニット。 - 前記第2貯留部は、
前記ベースプレートの一方の面に接続する第1サブタンクと、
前記ベースプレートの他方の面に接続する第2サブタンクと、
を含み、
前記ベースプレートには、前記第1サブタンクと前記第2サブタンクとをつなぐ開口が設けられる、請求項3に記載の排気処理ユニット。 - 前記第1貯留部と前記第2貯留部とは連通している、請求項1に記載の排気処理ユニット。
- 前記第1貯留部と前記第2貯留部とを支持する1つのベースプレートをさらに備え、
前記第1貯留部は、前記ベースプレートの一方の面に接続され、
前記第2貯留部は、前記ベースプレートの他方の面に接続される、
請求項5に記載の排気処理ユニット。 - 前記第1貯留部と前記第2貯留部と前記ベースプレートは一体として形成され、
前記ベースプレートには、前記第1貯留部と前記第2貯留部との間を連通する孔が設けられる、請求項6に記載の排気処理ユニット。 - 前記冷媒が気化することにより前記噴射装置付近で発生する気泡のうち、前記第2接続部から前記第2貯留部に向かう気泡は、前記第1接続部から前記第1貯留部に向かう気泡より多い、請求項1、2または5のいずれかに記載の排気処理ユニット。
- 前記第2管部が前記第2貯留部に接続する第4接続部は、前記第1管部が前記第1貯留部に接続する第3接続部よりも上方にある、請求項1に記載の排気処理ユニット。
- 前記第2貯留部の下端は、前記第1貯留部の下端よりも上方にある、請求項9に記載の排気処理ユニット。
- 前記エンジンと前記第1貯留部とを接続し、前記噴射装置を冷却するための冷媒を前記第1貯留部に導く第3管部と、
前記エンジンと前記第2貯留部とを接続し、前記噴射装置から排出された冷媒を前記エンジンに導く第4管部とをさらに備え、
前記第1管部と第3管部とは、前記第1貯留部の第1側面に接続され、
前記第2管部と第4管部とは、前記第2貯留部の第2側面に接続される、
請求項1、2、または5のいずれかに記載の排気処理ユニット。 - 前記第1側面は、前記第1貯留部の側面のうち、前記噴射装置に最も近い側面であり、
前記第2側面は、前記第2貯留部の側面のうち、前記噴射装置に最も近い側面である、
請求項11に記載の排気処理ユニット。 - 前記第3管部は、前記第1管部よりも上方において前記第1貯留部に接続され、
前記第4管部は、前記第2管部よりも上方において前記第2貯留部に接続される、
請求項11に記載の排気処理ユニット。 - 請求項11に記載の排気処理ユニットと、
動力を出力するエンジンと、
作業機と、
を備える、作業車両。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/239,876 US9145806B2 (en) | 2013-03-15 | 2013-09-19 | Exhaust treatment unit and work vehicle having exhaust treatment unit |
CN201380003228.XA CN104254674B (zh) | 2013-03-15 | 2013-09-19 | 排气处理单元及搭载排气处理单元的作业车辆 |
JP2013544940A JP5481604B1 (ja) | 2013-03-15 | 2013-09-19 | 排気処理ユニット及び排気処理ユニットを搭載する作業車両 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2013/057519 WO2014141478A1 (ja) | 2013-03-15 | 2013-03-15 | 排気ガス後処理ユニット、及びこれを搭載する建設車両 |
JPPCT/JP2013/057519 | 2013-03-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014141513A1 true WO2014141513A1 (ja) | 2014-09-18 |
Family
ID=51409581
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/057519 WO2014141478A1 (ja) | 2013-03-15 | 2013-03-15 | 排気ガス後処理ユニット、及びこれを搭載する建設車両 |
PCT/JP2013/075252 WO2014141513A1 (ja) | 2013-03-15 | 2013-09-19 | 排気処理ユニット及び排気処理ユニットを搭載する作業車両 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/057519 WO2014141478A1 (ja) | 2013-03-15 | 2013-03-15 | 排気ガス後処理ユニット、及びこれを搭載する建設車両 |
Country Status (6)
Country | Link |
---|---|
US (2) | US8973353B2 (ja) |
JP (1) | JP5546694B1 (ja) |
KR (1) | KR101579213B1 (ja) |
CN (2) | CN104081013B (ja) |
DE (1) | DE112013000161C5 (ja) |
WO (2) | WO2014141478A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016043346A1 (ja) * | 2015-10-01 | 2016-03-24 | 株式会社小松製作所 | 作業車両 |
WO2017187640A1 (ja) * | 2016-04-28 | 2017-11-02 | 株式会社小松製作所 | 排気ガス後処理ユニット及び作業車両 |
JP7405497B2 (ja) | 2019-11-05 | 2023-12-26 | キャタピラー エス エー アール エル | 排ガス浄化装置および作業機械 |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104136690B (zh) * | 2013-04-26 | 2016-01-20 | 株式会社小松制作所 | 推土机 |
WO2014196346A1 (ja) * | 2013-06-04 | 2014-12-11 | ボッシュ株式会社 | 還元剤供給装置及び排気浄化システム |
JP5666747B1 (ja) * | 2013-08-09 | 2015-02-12 | 株式会社小松製作所 | 支持機構、排気処理ユニット、ホイールローダ |
US20150068198A1 (en) * | 2013-09-11 | 2015-03-12 | International Engine Intellectual Property Company | Cooling def doser |
KR102344825B1 (ko) * | 2013-10-25 | 2021-12-28 | 얀마 파워 테크놀로지 가부시키가이샤 | 작업 차량의 엔진 장치 |
JP6087804B2 (ja) * | 2013-12-26 | 2017-03-01 | 株式会社クボタ | ディーゼルエンジン |
US9217236B2 (en) * | 2013-12-27 | 2015-12-22 | Komatsu Ltd. | Work vehicle |
JP6217408B2 (ja) * | 2014-01-24 | 2017-10-25 | コベルコ建機株式会社 | 建設機械の排気処理装置、および建設機械 |
WO2016027307A1 (ja) * | 2014-08-19 | 2016-02-25 | 株式会社小松製作所 | 作業車両 |
WO2016056422A1 (ja) * | 2014-10-06 | 2016-04-14 | ヤンマー株式会社 | エンジン装置 |
DE102015114081A1 (de) * | 2015-08-25 | 2017-03-02 | Claas Tractor Sas | Vorrichtung zur Abgasnachbehandlung |
KR102413070B1 (ko) * | 2015-11-05 | 2022-06-24 | 현대두산인프라코어 주식회사 | 환원제 분사 모듈의 냉각 장치 및 이를 갖는 엔진 냉각 시스템 |
US10640949B2 (en) * | 2016-03-10 | 2020-05-05 | Hitachi Construction Machinery Co., Ltd. | Construction machine |
JP6548224B2 (ja) * | 2016-03-29 | 2019-07-24 | 日立建機株式会社 | 作業機械 |
CA2958965C (en) | 2016-08-03 | 2019-01-08 | Komatsu Ltd. | Working vehicle |
IT201800006047A1 (it) * | 2018-06-05 | 2019-12-05 | Dispositivo di supporto per una tubazione di un veicolo | |
JP6679676B2 (ja) * | 2018-09-05 | 2020-04-15 | 株式会社クボタ | 作業機 |
JP2020153336A (ja) * | 2019-03-22 | 2020-09-24 | ヤンマーパワーテクノロジー株式会社 | エンジン |
DE102021107434A1 (de) | 2021-03-24 | 2022-09-29 | Volkswagen Aktiengesellschaft | Kühlsystem für ein Reduktionsmitteldosiersystem sowie Verbrennungsmotor mit einem solchen Kühlsystem |
WO2023244576A1 (en) * | 2022-06-17 | 2023-12-21 | Cummins Emission Solutions Inc. | Exhaust conduit assembly |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59174320U (ja) * | 1983-05-10 | 1984-11-21 | トヨタ自動車株式会社 | エンジン冷却系構造 |
JPS6263118A (ja) * | 1985-09-13 | 1987-03-19 | Yanmar Diesel Engine Co Ltd | 横形エンジンの冷却装置 |
JPH07332182A (ja) * | 1994-06-13 | 1995-12-22 | Daihatsu Motor Co Ltd | 吸気装置の支持構造 |
JP2009103013A (ja) * | 2007-10-22 | 2009-05-14 | Denso Corp | 排気浄化装置 |
JP2013047488A (ja) * | 2011-08-29 | 2013-03-07 | Toyota Motor Corp | 冷却装置 |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19806265C5 (de) * | 1998-02-16 | 2004-07-22 | Siemens Ag | Dosiersystem |
DE19919426C1 (de) | 1999-04-28 | 2000-03-30 | Siemens Ag | Ventilaufnahmevorrichtung für ein Dosierventil einer Abgasnachbehandlungsanlage |
DE10251588A1 (de) * | 2002-11-06 | 2004-05-19 | Robert Bosch Gmbh | Vorrichtung zur Nachbehandlung des Abgases einer Brennkraftmaschine |
JP2004293494A (ja) | 2003-03-28 | 2004-10-21 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
EP1691046B1 (en) | 2003-09-19 | 2013-04-24 | Nissan Diesel Motor Co., Ltd. | Exhaust emission purification apparatus for an internal combustion engine |
WO2006011553A1 (ja) * | 2004-07-30 | 2006-02-02 | Komatsu Ltd. | 内燃機関の給気制御装置 |
DE102004046879A1 (de) | 2004-09-28 | 2006-04-13 | Robert Bosch Gmbh | Dosiervorrichtung und Brennkraftmaschine mit Dosiervorrichtung |
DE102004046881A1 (de) * | 2004-09-28 | 2006-04-13 | Robert Bosch Gmbh | Zuführsystem für ein Medium, insbesondere zur Behandlung von Abgasen einer Brennkraftmaschine, Abgasreinigungsvorrichtung und Verfahren zum Betreiben eines Zuführsystems |
JP4586562B2 (ja) * | 2005-02-18 | 2010-11-24 | 日産自動車株式会社 | 車両用冷却システム |
DE102006061731A1 (de) * | 2006-12-28 | 2008-07-03 | Robert Bosch Gmbh | Dosiervorrichtung für Flüssig-Reduktionsmittel |
JP2008169711A (ja) | 2007-01-09 | 2008-07-24 | Denso Corp | 還元剤供給装置 |
DE102007003120B4 (de) * | 2007-01-15 | 2018-11-29 | Robert Bosch Gmbh | Vorrichtung zum Einbringen eines flüssigen Stoffes in das Abgas einer Brennkraftmaschine |
JP4706660B2 (ja) | 2007-04-10 | 2011-06-22 | 株式会社デンソー | 還元剤供給装置 |
JP2009097479A (ja) | 2007-10-19 | 2009-05-07 | Bosch Corp | 還元剤供給装置の制御装置及び制御方法 |
DE102008012780B4 (de) * | 2008-03-05 | 2012-10-04 | Hydraulik-Ring Gmbh | Abgasnachbehandlungseinrichtung |
CN102124191B (zh) | 2008-11-11 | 2013-04-24 | 日立建机株式会社 | 废气处理装置 |
US8122710B2 (en) | 2008-12-01 | 2012-02-28 | International Engine Intellectual Property Company, Llc | Thermal management of urea dosing components in an engine exhaust after-treatment system |
US20110079003A1 (en) | 2009-10-05 | 2011-04-07 | Caterpillar Inc. | Reductant nozzle indentation mount |
JP5468393B2 (ja) | 2010-01-09 | 2014-04-09 | 日立建機株式会社 | 建設機械 |
US8241598B2 (en) | 2010-03-31 | 2012-08-14 | Denso International America, Inc. | Temperature control circuit for SCR urea system |
JP5633190B2 (ja) * | 2010-05-25 | 2014-12-03 | いすゞ自動車株式会社 | 復帰制御システム |
DE102010030343A1 (de) * | 2010-06-22 | 2011-12-22 | Robert Bosch Gmbh | Vorrichtung und Verfahren zur Eindosierung einer Flüssigkeit in den Abgasstrang einer Brennkraftmaschine |
JP5755869B2 (ja) * | 2010-11-18 | 2015-07-29 | Udトラックス株式会社 | 配管構造、及び、その配管構造を有する車両 |
CN103261602B (zh) * | 2010-12-27 | 2015-07-01 | 博世株式会社 | 排气净化***及排气净化***的控制方法 |
JP5604377B2 (ja) * | 2011-06-29 | 2014-10-08 | 日立建機株式会社 | ホイールローダ |
US8800275B2 (en) * | 2012-02-27 | 2014-08-12 | Caterpillar Inc. | Mounting assembly for a reductant injector |
US9458746B2 (en) * | 2013-03-01 | 2016-10-04 | Cummins Emission Solutions Inc. | Systems and techniques for heating urea injection systems |
US8997467B2 (en) | 2013-03-15 | 2015-04-07 | Caterpillar Inc. | System and method for post-shutdown temperature management and purge |
-
2013
- 2013-03-15 JP JP2013539066A patent/JP5546694B1/ja active Active
- 2013-03-15 KR KR1020157013937A patent/KR101579213B1/ko active IP Right Grant
- 2013-03-15 WO PCT/JP2013/057519 patent/WO2014141478A1/ja active Application Filing
- 2013-03-15 US US14/234,474 patent/US8973353B2/en active Active
- 2013-03-15 CN CN201380002753.XA patent/CN104081013B/zh active Active
- 2013-03-15 DE DE112013000161.6T patent/DE112013000161C5/de active Active
- 2013-09-19 US US14/239,876 patent/US9145806B2/en active Active
- 2013-09-19 CN CN201380003228.XA patent/CN104254674B/zh active Active
- 2013-09-19 WO PCT/JP2013/075252 patent/WO2014141513A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59174320U (ja) * | 1983-05-10 | 1984-11-21 | トヨタ自動車株式会社 | エンジン冷却系構造 |
JPS6263118A (ja) * | 1985-09-13 | 1987-03-19 | Yanmar Diesel Engine Co Ltd | 横形エンジンの冷却装置 |
JPH07332182A (ja) * | 1994-06-13 | 1995-12-22 | Daihatsu Motor Co Ltd | 吸気装置の支持構造 |
JP2009103013A (ja) * | 2007-10-22 | 2009-05-14 | Denso Corp | 排気浄化装置 |
JP2013047488A (ja) * | 2011-08-29 | 2013-03-07 | Toyota Motor Corp | 冷却装置 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016043346A1 (ja) * | 2015-10-01 | 2016-03-24 | 株式会社小松製作所 | 作業車両 |
JP5923223B1 (ja) * | 2015-10-01 | 2016-05-24 | 株式会社小松製作所 | 作業車両 |
WO2017187640A1 (ja) * | 2016-04-28 | 2017-11-02 | 株式会社小松製作所 | 排気ガス後処理ユニット及び作業車両 |
US10215071B2 (en) | 2016-04-28 | 2019-02-26 | Komatsu Ltd. | Exhaust gas aftertreatment unit and work vehicle |
JP7405497B2 (ja) | 2019-11-05 | 2023-12-26 | キャタピラー エス エー アール エル | 排ガス浄化装置および作業機械 |
Also Published As
Publication number | Publication date |
---|---|
JP5546694B1 (ja) | 2014-07-09 |
US20150078967A1 (en) | 2015-03-19 |
US9145806B2 (en) | 2015-09-29 |
KR101579213B1 (ko) | 2015-12-21 |
CN104081013A (zh) | 2014-10-01 |
DE112013000161C5 (de) | 2023-03-16 |
WO2014141478A1 (ja) | 2014-09-18 |
US8973353B2 (en) | 2015-03-10 |
DE112013000161T5 (de) | 2014-12-18 |
KR20150079850A (ko) | 2015-07-08 |
US20140290222A1 (en) | 2014-10-02 |
JPWO2014141478A1 (ja) | 2017-02-16 |
CN104254674A (zh) | 2014-12-31 |
CN104081013B (zh) | 2016-05-25 |
DE112013000161B4 (de) | 2017-08-24 |
CN104254674B (zh) | 2015-07-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2014141513A1 (ja) | 排気処理ユニット及び排気処理ユニットを搭載する作業車両 | |
US9353503B2 (en) | Work vehicle | |
US9556772B2 (en) | Fuel tank and liquid tank configuration for a work vehicle | |
JP5918154B2 (ja) | 作業車両のエンジン装置 | |
KR101630253B1 (ko) | 작업 차량 | |
KR102138732B1 (ko) | 작업 차량 | |
US9708951B2 (en) | Reducing agent tank module | |
US9394668B2 (en) | Bulldozer | |
US9033081B1 (en) | Work vehicle | |
KR20220013458A (ko) | 작업 차량의 엔진 장치 | |
JP5603517B2 (ja) | 排気ガス後処理ユニット、及びこれを搭載する建設車両 | |
JP6091288B2 (ja) | エンジン装置 | |
JP6284281B2 (ja) | トラクタ | |
JP5481604B1 (ja) | 排気処理ユニット及び排気処理ユニットを搭載する作業車両 | |
JP6157966B2 (ja) | トラクタ | |
JP7351600B2 (ja) | 機体および作業機械 | |
JP7424736B2 (ja) | 機体および作業機械 | |
JP2017008947A (ja) | 作業車両 | |
KR101578337B1 (ko) | 유압 셔블 | |
JP2018100610A (ja) | 車体構造 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2013544940 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14239876 Country of ref document: US |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13878336 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13878336 Country of ref document: EP Kind code of ref document: A1 |