WO2015129121A1 - ダンプトラック - Google Patents
ダンプトラック Download PDFInfo
- Publication number
- WO2015129121A1 WO2015129121A1 PCT/JP2014/081752 JP2014081752W WO2015129121A1 WO 2015129121 A1 WO2015129121 A1 WO 2015129121A1 JP 2014081752 W JP2014081752 W JP 2014081752W WO 2015129121 A1 WO2015129121 A1 WO 2015129121A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exhaust gas
- engine
- pipe
- dump truck
- gas aftertreatment
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
- B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/04—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/04—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element
- B60P1/28—Tipping body constructions
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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
- 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
- F01N13/009—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 having two or more separate purifying devices arranged in series
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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
- 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
- F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
- F01N13/1822—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration for fixing exhaust pipes or devices to vehicle body
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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
- F01N3/02—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
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/10—Road Vehicles
- B60Y2200/14—Trucks; Load vehicles, Busses
- B60Y2200/142—Heavy duty trucks
-
- 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
- F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
- F01N2340/04—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the arrangement of an exhaust pipe, manifold or apparatus in relation to vehicle frame or particular vehicle parts
-
- 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
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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
- 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 a dump truck, and more specifically, to an improvement in a communication pipe for flowing exhaust gas from an engine mounted on the dump truck to an exhaust gas aftertreatment device.
- particulate matter (PM: Particulate Matter) contained in exhaust gas from internal combustion engines such as diesel engines is converted into a special filter (DPF: Diesel Particulate Filter). It is known to collect.
- PM Particulate Matter
- DPF Diesel Particulate Filter
- Work vehicles equipped with diesel engines, such as dump trucks and wheel loaders, are equipped with an exhaust gas aftertreatment device equipped with a DPF because of the need to comply with exhaust gas regulations.
- the exhaust gas aftertreatment device is provided in the middle of the exhaust path from the engine (see, for example, Patent Document 1).
- the communication pipe for flowing the exhaust gas from the engine to the exhaust gas aftertreatment device is used even after the exhaust gas aftertreatment device is removed. Covers the part. When this part overlapped with the work part, it was necessary to remove this communication pipe before starting the maintenance of the engine, and the maintainability of the engine was poor.
- the present invention has been made in view of such circumstances, and an object thereof is to provide a dump truck having good maintainability.
- the dump truck of the present invention is a dump truck comprising a main frame, an engine mounted on the main frame, and an exhaust gas aftertreatment device that is supported by the main frame and purifies exhaust gas of the engine, One end is connected to the engine, the other end is connected to the exhaust gas aftertreatment device, and a communication pipe is provided for flowing the exhaust gas discharged from the engine to the exhaust gas aftertreatment device.
- the communication pipe is connected to the engine from the engine.
- a first pipe part that extends laterally, a second pipe part that is connected in a bent state with respect to the first pipe part, and that is bent with respect to the second pipe part.
- a third pipe portion extending toward the exhaust gas aftertreatment device.
- the exhaust gas discharged from the engine flows to the exhaust gas aftertreatment device via the communication pipe.
- the communication pipe first extends to the side of the engine, is bent and then extends upward, and is further bent and then extends toward the exhaust gas aftertreatment device. That is, the communication pipe is provided on the side of the engine and is not provided directly above the engine. For this reason, the communication pipe does not get in the way even if the communication pipe is not removed during maintenance of the engine from above. Therefore, according to the dump truck of the present invention, maintainability can be improved.
- the second pipe portion extends obliquely so as to move away from the engine as it goes upward.
- the second pipe part is connected in an obtuse angle with respect to the first pipe part, and the third pipe part is obtuse with respect to the second pipe part. It is preferable to be connected in a bent state.
- the exhaust gas aftertreatment device includes a particulate filter device provided on the upstream side and a selective reduction catalyst device provided on the downstream side in parallel, and the communication pipe includes: It is preferable that the particulate filter device is connected obliquely from below.
- the communication pipe is preferably formed in a channel shape or a crank shape.
- the right view which shows the whole dump truck which concerns on one Embodiment of this invention.
- the front view of a dump truck. The disassembled perspective view which shows the principal part of a dump truck.
- the right view which shows the principal part of a dump truck.
- the front view which shows the principal part of a dump truck.
- the top view which shows the principal part of a dump truck.
- the front / rear / left / right / up / down directions refer to the front / rear / left / right / up / down directions in a state where the driver is seated in the driver's seat in the cab 5 of the dump truck 1.
- the left-right direction is the same as the vehicle width direction of the dump truck 1
- the up-down direction is the same as the vehicle height direction of the dump truck 1.
- 3 to 6 only the main frame 2, the engine 3, the exhaust gas aftertreatment device 10, and the communication pipe 40, which are the main parts of the present invention, are illustrated, and other configurations are omitted.
- the dump truck 1 includes a main frame 2 that extends in the front-rear direction of the vehicle body, and an engine 3 is mounted on the front portion of the main frame 2.
- the engine 3 of this embodiment is a diesel engine.
- the engine 3 includes an intake pipe into which fresh air flows, an exhaust pipe from which exhaust gas flows out, and a supercharger 31.
- the supercharger 31 is provided in the middle of the exhaust pipe, and as shown in FIG. 3, an exhaust turbine 31A that is rotationally driven by exhaust gas, and a compressor that is provided in the middle of the intake pipe and rotates integrally with the exhaust turbine 31A. 31B.
- the exhaust turbine 31 ⁇ / b> A and the compressor 31 ⁇ / b> B are provided side by side in the front-rear direction on the upper part of the right side surface of the engine 3.
- An exhaust turbine outlet 31C of the exhaust turbine 31A located on the rear side faces rightward and is connected to an upstream pipe portion inlet 41A that is an inlet of a communication pipe 40 described later.
- a downstream pipe portion outlet 43 ⁇ / b> B (see FIG. 5) that is an outlet of the communication pipe 40 is connected to a DPF device inlet 11 ⁇ / b> A that is an inlet of the exhaust gas aftertreatment device 10.
- a cab 5 is provided on the left front of the main frame 2.
- the right side of the cab 5 is a platform 6 which is a flat work area.
- the platform 6 is provided with an inspection port 6B having an openable door 6A. This inspection port 6B leads to the engine room.
- a ladder 7A and a staircase 7B for moving up and down between the cab 5 and the platform 6 and the ground are provided at the front end portion of the main frame 2.
- traveling wheels front wheels 4A, rear wheels 4B
- traveling wheels front wheels 4A, rear wheels 4B
- excavated rocks and earth and sand are disposed at the rear of the main frame 2.
- a vessel 8 is provided for loading as a load.
- the vessel 8 is configured to be able to undulate around a rotation shaft 8A provided at the rear end of the main frame 2 by expansion and contraction of a hoist cylinder (not shown).
- the dump truck 1 uses the internal space of the rib 8B provided on the outer surface of the vessel 8 to flow the exhaust gas. Forming a road.
- the vessel 8 is heated by circulating the exhaust gas from the engine 3 in the exhaust gas passage.
- a vessel inlet 8 ⁇ / b> C into which exhaust gas flows is provided on the right side of the front surface of the vessel 8.
- the vessel inlet 8C communicates with the SCR device outlet 13B, which is the outlet of the exhaust gas aftertreatment device 10, via the connection pipe 51, and the exhaust gas flows into the rib 8B.
- the main frame 2 includes a pair of side members 21 extending in parallel in the front-rear direction and a plurality of cross members 22 extending in the left-right direction and connecting the pair of side members 21.
- the side member 21 is provided with a front support 23 extending upward in a state inclined in a side view, a vertical member 24 extending substantially vertically upward, and a vessel support 25 in order from the front side.
- the engine 3 is mounted at a position where the front end portion is located behind the front support 23 and the rear end portion overlaps the vertical member 24.
- the vertical member 24 and the vessel support 25 are connected by a circular side frame 26 extending in the front-rear direction. Thereby, the torsional rigidity of the main frame 2 is enhanced.
- the vertical member 24 is composed of a pair of vertical frames 24A extending upward and a cross frame 24B spanning the upper ends thereof, and is formed in a gate shape. ing. The distance between the left and right of the pair of vertical frames 24A increases toward the top.
- the cross frame 24B protrudes upward in the vicinity of the center, and is formed so as to become lower toward the end in the left-right direction.
- the cross frame 24B is formed in this way for the following two reasons. The first reason is to ensure the right field of view from the cab 5 without being blocked by the exhaust gas aftertreatment device 10. Another reason is to shorten the length of the upstream pipe portion 41 of the communication pipe 40. If the cross frame 24B extends horizontally, the exhaust gas aftertreatment device 10 is mounted on the cross frame 24B in a horizontal state, and the communication tube 40 has the bellows tube portion 42 extending vertically. If it does so, the lower end of the bellows pipe part 42 and the exhaust turbine outlet 31C will separate, and the upstream pipe part 41 which connects them will become long. In order to avoid such a situation, the cross frame 24B is formed in a mountain shape as described above.
- a connecting bracket 24C is provided at the upper end of the vertical frame 24A of the vertical member 24, and the upper end of the front suspension 9 is rotatably connected to the connecting bracket 24C. (See FIG. 1).
- the vessel support 25 has a pair of vertical frames 25A and a cross frame 25B connecting them at the upper end, and is formed in a gate shape.
- the vessel support 25 supports the front end portion of the vessel 8 in a face-down state from below by a pair of support portions 25C provided on the cross frame 25B.
- the communication pipe 40 is composed of an upstream pipe part 41 as a first pipe part, a bellows pipe part 42 as a second pipe part, and a downstream pipe part 43 as a third pipe part. ing.
- the exhaust gas flows in the order of the upstream pipe part 41, the bellows pipe part 42, and the downstream pipe part 43.
- the downstream pipe portion outlet 43 ⁇ / b> B is connected to a DPF device inlet 11 ⁇ / b> A that is an inlet of the exhaust gas aftertreatment device 10.
- the upstream pipe portion 41 extends from the engine 3 to the right side.
- the bellows pipe part 42 is configured to be extendable and contracted, is connected to the upstream pipe part 41 in an obtuse angle state, and extends obliquely upward so as to be separated from the engine 3 to the right as it goes upward.
- the downstream pipe portion 43 is connected to the bellows pipe portion 42 while being bent at an obtuse angle, and extends to the upper left toward the exhaust gas aftertreatment device 10.
- the communication pipe 40 is formed in a channel shape. 4, the communication pipe 40 extends in the vertical direction along the vertical frame 24A, and the downstream pipe outlet 43B (see FIG. 5) is positioned substantially vertically above the upstream pipe inlet 41A. is doing.
- the communication pipe 40 Since the communication pipe 40 is connected to the exhaust gas aftertreatment device 10 via the right side of the engine 3, the communication pipe 40 does not get in the way during maintenance of the engine 3 from the platform 6.
- the communication pipe 40 can absorb the radial and axial displacements that occur between the engine 3 and the exhaust gas aftertreatment device 10 due to vibration during traveling or the like.
- a spherical flange or a slide-type tube tube may be provided in the communication tube 40.
- the exhaust gas aftertreatment device 10 into which the exhaust gas flows from the communication pipe 40 includes, in order from the upstream side in the exhaust gas flow direction, a diesel particulate filter (hereinafter referred to as “DPF”) device 11, A mixing device 12 and a selective catalytic reduction (hereinafter abbreviated as “SCR”) device 13 are provided.
- DPF diesel particulate filter
- SCR selective catalytic reduction
- the DPF device 11 and the SCR device 13 are formed in a cylindrical shape extending in the front-rear direction.
- the DPF device 11 is disposed on the inner side in the left-right direction
- the SCR device 13 is disposed on the outer side with a space 14 (see FIG. 5) provided therebetween.
- the DPF device inlet 11A which is the inlet of the exhaust gas aftertreatment device 10, is provided at the front of the DPF device 11 and faces the lower right.
- the communication pipe 40 extends toward the space 14 between the DPF device 11 and the SCR device 13 and is connected to the DPF device 11 from obliquely below. That is, the communication pipe 40 and the DPF device 11 are connected in the space 14. Further, as shown in FIG. 5, the communication pipe 40 is within the width of the exhaust gas aftertreatment device 10 when viewed from the front.
- the DPF device 11 accommodates a columnar DPF (not shown) inside a cylindrical case.
- the DPF collects particulate matter in the exhaust gas that passes therethrough.
- the mixing apparatus 12 includes an upstream elbow pipe 121 that is connected to the outlet pipe 111 of the DPF apparatus 11 and changes the flow direction of the exhaust gas flowing out from the DPF apparatus 11 by approximately 90 °, and the upstream elbow pipe A straight pipe 122 connected to the downstream end of 121 and extending in a direction intersecting the axis of the outlet pipe 111 of the DPF device 11, and a downstream connected to the downstream end of the straight pipe 122 and further changing the flow direction of the exhaust gas by approximately 90 °.
- Side elbow pipe 123 is connected to the outlet pipe 111 of the DPF apparatus 11 and changes the flow direction of the exhaust gas flowing out from the DPF apparatus 11 by approximately 90 °
- Side elbow pipe 123 is connected to the downstream end of 121 and extending in a direction intersecting the axis of the outlet pipe 111 of the DPF device 11, and a downstream connected to the downstream end of the straight pipe 122 and further changing the flow direction of the exhaust gas by approximately 90 °.
- the upstream elbow pipe 121 is attached with an injector (not shown) for injecting a urea aqueous solution as a reducing agent aqueous solution toward the inside of the straight pipe 122.
- the aqueous urea solution injected from the injector into the exhaust gas is thermally decomposed into ammonia by the heat of the exhaust gas.
- Ammonia is supplied to the SCR device 13 together with the exhaust gas as a reducing agent.
- the SCR device 13 is connected to a further downstream end of the downstream elbow pipe 123.
- the SCR device 13 accommodates a columnar SCR (not shown) inside a cylindrical case.
- the SCR reduces and purifies nitrogen oxides in exhaust gas by using ammonia generated by the mixing device 12 as a reducing agent.
- an ammonia reduction catalyst may be provided on the downstream side of the SCR.
- the ammonia reduction catalyst is made detoxified by oxidizing ammonia that has been unused in the SCR.
- the DPF device 11, the mixing device 12, and the SCR device 13 described above are arranged side by side so that the flow directions of the exhaust gas flowing through each of them are substantially parallel. For this reason, the direction of the exhaust gas flowing inside the DPF device 11 and the SCR device 13 is opposite to the direction of the exhaust gas flowing inside the mixing device 12.
- the exhaust gas aftertreatment device 10 having such a configuration is formed in a substantially S shape in plan view.
- the SCR device outlet 13 ⁇ / b> B that is the outlet of the exhaust gas aftertreatment device 10 is connected to the vessel inlet 8 ⁇ / b> C via the connection pipe 51.
- the inlet 8C of the vessel 8 is provided on the right front surface of the vessel 8, and the exhaust gas aftertreatment device 10 is provided on the right side of the vertical member 24. Further, the exhaust gas aftertreatment device 10 is provided with the center in the front-rear direction shifted from the cross frame 24B of the vertical member 24 to the rear side. For this reason, the distance between the inlet 8C of the vessel 8 and the outlet 13B of the SCR device 13 is shortened.
- the bracket 24D extends from the upper surface of the connecting member 24C of the vertical member 24, and the bracket 24E extends rearward from the back surface near the center of the vertical member 24.
- the exhaust gas aftertreatment device 10 is fixed on the brackets 24D and 24E via the subframe 27 and the vibration isolating rubber 28.
- the exhaust gas aftertreatment device 10 thus supported is cantilevered so that its center in the front-rear direction is shifted rearward with respect to the cross frame 24B of the vertical member 24 in a state of being inclined to become lower toward the right end. It is supported in a state (see FIG. 4).
- the aftertreatment device 10 Since the aftertreatment device 10 is supported in an inclined state so as to become lower toward the right end, the left field of view from the cab 5 is well secured without being blocked by the exhaust gas aftertreatment device 10. ing. Since the post-processing device 10 is supported in a cantilever state in which the center in the front-rear direction is shifted to the rear side, the dead space behind the platform 6 can be effectively used, and when the engine 3 is serviced from the platform 6 The exhaust gas aftertreatment device 10 is prevented from becoming an obstacle.
- the exhaust gas aftertreatment device 10 is reliably supported even when the aftertreatment device 10 is provided shifted to the rear side.
- the position of the vibration isolating rubber 28 may not be the position of the present embodiment, and the vibration isolating rubber 28 may not be provided.
- the anti-vibration rubber 28 is not provided, vibrations and impacts may be absorbed by another mechanism.
- FIG. 1 shows a state in which the door 6A of the inspection port 6B is closed, and the door 6A in an opened state is drawn by a two-dot chain line.
- the front view of FIG. 2 shows a state in which the door 6A of the inspection port 6B is opened.
- the supercharger 31 since the supercharger 31 is provided in the upper part of the right side surface of the engine 3, the supercharger 31 can be serviced from the inspection port 6B.
- the head cover can be detached and the fuel injection device can be adjusted from the inspection port 6B.
- the exhaust gas discharged from the engine 3 flows to the exhaust gas aftertreatment device 10 via the communication pipe 40.
- the communication pipe 40 first extends to the right of the engine 3, is bent and then extends upward, and is further bent and then extends toward the exhaust gas aftertreatment device 10. That is, the communication pipe 40 is provided on the right side of the engine 3 and is not provided immediately above the engine 3. For this reason, the communication pipe 40 does not get in the way even if the communication pipe 40 is not removed during maintenance of the engine 3 from above. Therefore, according to the dump truck 1 of this embodiment, maintainability can be made favorable.
- the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
- the DPF device 11 is disposed on the inner side and the SCR device 13 is disposed on the outer side.
- the exhaust gas aftertreatment device 10 includes the DPF device 11 and the SCR device 13, but may include only the DPF device 11.
- the communication pipe 40 is formed in a channel shape.
- the communication pipe 40 is provided. May be formed in a crank shape. Further, when both are arranged in the front-rear direction, the downstream pipe portion 43 may be twisted by 90 ° and connected.
- the present invention can be used not only for rigid dump trucks but also for articulated dump trucks.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Exhaust Gas After Treatment (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
以下の説明において、前後・左右・上下方向とは、運転者がダンプトラック1のキャブ5内の運転席に着座した運転者が正面を向いた状態における前後・左右・上下方向を言う。また、左右方向はダンプトラック1の車幅方向と同意であり、上下方向はダンプトラック1の車高方向と同意である。
図3~図6においては、本発明の要部である、メインフレーム2、エンジン3、排気ガス後処理装置10、および連通管40のみが描かれ、それ以外の構成は省略されている。
図1~図3に示すように、ダンプトラック1は、車体の前後方向に延びるメインフレーム2を備え、メインフレーム2の前部にはエンジン3が搭載されている。本実施形態のエンジン3は、ディーゼルエンジンである。エンジン3は、新気が流入する吸気管と、排気ガスが流出する排気管と、過給機31とを備える。
また、メインフレーム2の前端部には、キャブ5およびプラットホーム6と地上との間で昇降を行うためのラダー7Aおよび階段7Bが設けられている。
図3~図6に示すように、メインフレーム2は、前後方向に平行に延びる一対のサイドメンバ21と、左右方向に延びて一対のサイドメンバ21を結ぶ複数のクロスメンバ22とを有する。サイドメンバ21には、前方側から順に、側方視において傾斜した状態で上方に延びるフロントサポート23、上方に略垂直に延びるバーチカルメンバ24、およびベッセルサポート25が立設されている。
図4に示すように、エンジン3は、前端部がフロントサポート23よりも後側に、後端部がバーチカルメンバ24と重なるような位置に搭載されている。バーチカルメンバ24とベッセルサポート25とは、前後方向に延びる円管状のサイドフレーム26により連結されている。それにより、メインフレーム2のねじり剛性が高められている。
一つ目の理由は、キャブ5からの右側の視界を、排気ガス後処理装置10に遮られることなく、良好に確保するためである。
もう一つの理由は、連通管40の上流管部41の長さを短くするためである。もしもクロスフレーム24Bが水平に延びていたならば、排気ガス後処理装置10は水平な状態でクロスフレーム24Bに搭載され、連通管40はジャバラ管部42が垂直に延びることとなる。そうすると、ジャバラ管部42の下端と排気タービン出口31Cとが離れてしまい、それらを結ぶ上流管部41が長くなってしまう。そのようなことを回避するために、クロスフレーム24Bを上述ように山型に形成した。
図5に示すように、連通管40は、第1管部としての上流管部41と、第2管部としてのジャバラ管部42と、第3管部としての下流管部43とから構成されている。連通管40内において、排気ガスは、上流管部41、ジャバラ管部42、下流管部43の順に流れる。下流管部出口43Bは、排気ガス後処理装置10の入口であるDPF装置入口11Aに接続されている。
図4に示す右側方視において、連通管40は、バーチカルフレーム24Aに沿って上下方向に延びており、上流管部入口41Aの略鉛直上方に、下流管部出口43B(図5参照)が位置している。
連通管40は、ジャバラ管部42を備えることにより、走行時の振動等によりエンジン3と排気ガス後処理装置10との間に生じる径方向および軸方向の変位を吸収することができる。
なお、ジャバラ管部42に代えてまたは加えて、球面フランジやスライド式の筒管を連通管40に設けてもよい。
連通管40から排気ガスが流入する排気ガス後処理装置10は、排気ガスの流れ方向における上流側から順に、ディーゼル・パーティキュレート・フィルタ(Diesel particulate filter:以下「DPF」と略す)装置11と、ミキシング装置12と、選択還元触媒(Selective Catalytic Reduction:以下「SCR」と略す)装置13とを備える。本実施形態では、図6に示すように、DPF装置11とSCR装置13とは、前後方向に延びる円筒状に形成されている。また、図5に示す正面視において、DPF装置11が左右方向の内側に配置され、間に空間14(図5参照)を設けてSCR装置13が外側に配置されている。
DPF装置11は、円筒状のケースの内部に円柱状のDPF(図示せず)を収容している。DPFは、通過する排気ガス中の粒子状物質を捕集するものである。
後処理装置10が、前後方向の中心が後ろ側にずれた片持ち状態で支持されていることにより、プラットホーム6の後方のデッドスペースを有効活用でき、かつ、プラットホーム6からのエンジン3の整備時に、排気ガス後処理装置10が邪魔になることが回避されている。
なお、本発明において、防振ゴム28の配置は本実施形態の位置でなくてもよく、さらに、防振ゴム28が設けられていなくてもよい。防振ゴム28が設けられていない場合には、他の機構により振動や衝撃を吸収すればよい。
本実施形態のダンプトラック1におけるエンジン3の整備方法を、図1および図2を参照しながら説明する。図1の右側面図は、点検口6Bの扉6Aが閉じた状態を示し、開いた状態の扉6Aが二点鎖線で描かれている。図2の正面図は、点検口6Bの扉6Aが開いた状態を示している。
本実施形態のダンプトラック1において、エンジン3の整備をするときには、キャブ5の右方のプラットホーム6に設けられた点検口6Bを開け、作業者がエンジン3の上に乗って行う。例えば過給機31は、エンジン3の右側面の上部に設けられているので、点検口6Bから過給機31の整備を行うことができる。その他にも、ヘッドカバーの脱着や、燃料噴射装置の調整を、点検口6Bから行うことができる。
以上の本実施形態のダンプトラック1によれば、エンジン3から排出された排気ガスは、連通管40を介して、排気ガス後処理装置10に流れる。連通管40は、まずエンジン3の右方に延び、折曲されてから上方に延び、さらに折曲されてから排気ガス後処理装置10に向かって延びる。つまり、連通管40は、エンジン3の右側方に設けられており、エンジン3の直上には設けられていない。このため、上方からのエンジン3の整備時に、連通管40を取り除かなくても、連通管40が邪魔にならない。したがって、本実施形態のダンプトラック1によれば、整備性を良好にすることができる。
なお、本発明は前述の実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。
例えば、前記実施形態では、DPF装置11が内側に、SCR装置13が外側に配置されているが、本発明では両者の配置を入れ換えてもよく、両者を前後方向に並べてもよい。
Claims (5)
- メインフレームと、前記メインフレームに搭載されたエンジンと、前記メインフレームに支持されて前記エンジンの排気ガスを浄化する排気ガス後処理装置とを備えるダンプトラックであって、
一端が前記エンジンに、他端が前記排気ガス後処理装置にそれぞれ接続され、前記エンジンから排出された排気ガスを前記排気ガス後処理装置に流す連通管を備え、
前記連通管は、前記エンジンから側方に延出した第1管部と、前記第1管部に対して折曲された状態で接続され、上下方向に延びる第2管部と、前記第2管部に対して折曲された状態で接続され、前記排気ガス後処理装置に向かって延びる第3管部とを有する
ことを特徴とするダンプトラック。 - 請求項1に記載のダンプトラックにおいて、
前記第2管部は、上に向かうほど前記エンジンから側方に離れるように、斜めに延びている
ことを特徴とするダンプトラック。 - 請求項1または請求項2に記載のダンプトラックにおいて、
前記第2管部は、前記第1管部に対して鈍角に折曲された状態で接続され、
前記第3管部は、前記第2管部に対して鈍角に折曲された状態で接続されている
ことを特徴とするダンプトラック。 - 請求項1乃至請求項3のいずれか一項に記載のダンプトラックにおいて、
前記排気ガス後処理装置は、上流側に設けられたパーティキュレート・フィルタ装置と、下流側に設けられた選択還元触媒装置とを並列に有し、
前記連通管は、パーティキュレート・フィルタ装置に斜め下から接続されている
ことを特徴とするダンプトラック。 - 請求項1乃至請求項4のいずれか一項に記載のダンプトラックにおいて、
前記連通管は、チャンネル状またはクランク状に形成されている
ことを特徴とするダンプトラック。
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JP7273619B2 (ja) * | 2018-06-01 | 2023-05-15 | マニタウォック クレイン カンパニーズ, エルエルシー | クレーン下部走行体上のエンジン排気後処理システムのための取り付け配設 |
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