WO2016016936A1 - 産業用車両 - Google Patents
産業用車両 Download PDFInfo
- Publication number
- WO2016016936A1 WO2016016936A1 PCT/JP2014/069883 JP2014069883W WO2016016936A1 WO 2016016936 A1 WO2016016936 A1 WO 2016016936A1 JP 2014069883 W JP2014069883 W JP 2014069883W WO 2016016936 A1 WO2016016936 A1 WO 2016016936A1
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- WIPO (PCT)
- Prior art keywords
- engine
- exhaust gas
- industrial vehicle
- purification device
- counterweight
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
-
- 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
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
- B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
-
- 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
- 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
- B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
- B60K5/12—Arrangement of engine supports
-
- 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
- B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
- B60K5/12—Arrangement of engine supports
- B60K5/1208—Resilient supports
- B60K5/1216—Resilient supports characterised by the location of the supports relative to the motor or to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07513—Details concerning the chassis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07554—Counterweights
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07572—Propulsion arrangements
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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
- F01N1/00—Silencing apparatus characterised by method of silencing
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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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
-
- 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
-
- 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
- B60Y2200/15—Fork lift trucks, Industrial trucks
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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
-
- 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
- F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
- F01N13/1844—Mechanical joints
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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
- F01N2230/00—Combination of silencers and other devices
- F01N2230/02—Exhaust 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
- F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
- F01N2340/02—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the distance of the apparatus to the engine, or the distance between two exhaust treating apparatuses
-
- 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
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/18—Methods or apparatus for fitting, inserting or repairing different elements by using quick-active type locking mechanisms, e.g. clips
-
- 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
Definitions
- the present disclosure relates to the technical field of industrial vehicles such as forklifts provided with an exhaust gas purification device that purifies exhaust gas of an engine that is a power source.
- An exhaust pipe may be provided with an exhaust gas purification device in order to purify air pollutants contained in exhaust gas discharged from a vehicle engine.
- a muffler may be provided on the exhaust pipe to reduce noise generated when exhaust gas is discharged.
- Such exhaust gas purification devices and noise reduction devices are disposed in an appropriate layout for the vehicle.
- Patent Literature 1 and Patent Literature 2 are examples of the layout of the exhaust gas purification device and the noise reduction device in this type of industrial vehicle.
- FIG. 7 is a schematic view simply showing the layout of the silencer in the industrial vehicle according to Patent Document 1.
- an engine 1 a radiator 2 for radiating cooling water flowing through a cooling water circuit 23 of the engine 1, a counterweight 3 provided behind the radiator 2, and a muffler 4 for reducing exhaust noise Is equipped.
- the blower fan 5 operates in accordance with the operation of the engine 1, and the air from the blower fan 5 is discharged to the outside through a window-like vent 6 provided on the counterweight 3 after passing through the radiator 2.
- the muffler 4 is disposed on the lower side of the counterweight 3 so as to be separated by the current plate 7 so as not to prevent the air blowing from the air blowing fan 5. In FIG. 7, the muffler 4 is disposed outside the engine room.
- FIG. 8A is a schematic view simply showing a first layout of the exhaust purification system in the industrial vehicle according to Patent Document 2
- FIG. 8B is a second view of the exhaust purification system in the industrial vehicle according to Patent Document 2.
- It is a schematic diagram which shows arrangement layout simply.
- FIGS. 8A and 8B the same components as those in FIG. 7 are denoted by the same reference numerals, and redundant description will be appropriately omitted.
- a diesel engine is mounted as the engine 1, and as an exhaust gas purification device, a diesel particulate filter (DPF) 8 for collecting and purifying unburned fine substances (PM) contained in exhaust gas is used. It is provided.
- DPF diesel particulate filter
- the purification performance is maintained by performing the regeneration process of burning the accumulated PM using the high temperature exhaust gas from the engine 1.
- the exhaust pipe 20 between the engine 1 and the DPF 8 becomes long, the temperature of the exhaust gas introduced into the DPF 8 decreases, which causes a problem.
- the exhaust pipe 20 between the engine 1 and the DPF 8 is shortened by arranging the DPF 8 to the side of the radiator 2, thereby securing the temperature of the exhaust gas introduced into the DPF 8 and improving the purification performance. I am trying.
- the DPF 8 is disposed at the step of the vehicle in view of the fact that maintenance including the detachment work by a worker is necessary to maintain the purification performance of the DPF. Thereby, the accessibility by the operator is improved while shortening the exhaust pipe 20 between the engine 1 and the DPF 8.
- a broken line 14 indicates an engine room in which the engine 1 is housed, and the DPF 8 is disposed outside the engine room 14.
- the exhaust gas purification device such as the DPF 8 is not installed in the patent document 1, if the DPF 8 is installed under the counterweight 3 based on the same idea as the muffler 4, in addition to the above problems, Since the distance between the fuel cell 1 and the DPF 8 is increased, the temperature of the exhaust gas introduced into the DPF 8 is lowered, and there is a concern that the purification performance is lowered.
- Patent Document 2 As shown in FIG. 8A, the distance between the engine 1 and the DPF 8 is shortened by arranging the DPF 8 to the side of the radiator 2 as compared with Patent Document 1. However, there is still room for further improvement since there is still a sufficient distance between the engine 1 and the DPF 8. Also, in FIG. 8B, by arranging DPF 8 in the step, the distance between engine 1 and DPF 8 is further shortened compared to FIG. 8A, but DPF 8 becomes extremely hot during operation, so it is easy to touch manually It is not desirable to place them in steps. In addition, it is not easy to secure the installation space of the DPF 8 in the step, and especially in small vehicles, it is often difficult. In addition, if the exhaust gas purification device is installed on the outside of the vehicle body frame, the assemblability may be impaired.
- At least one embodiment of the present invention has been made in view of the above-described problems, and provides an industrial vehicle that can be equipped with an exhaust purification device with an efficient layout and can achieve good purification performance. With the goal.
- an industrial vehicle has a cargo handling device provided at the front of the vehicle, a counterweight provided at the rear of the vehicle, and the vehicle
- the distance between the engine and the exhaust gas purification device can be further shortened by arranging the exhaust gas purification device in the engine room.
- the temperature decrease of the exhaust gas introduced into the exhaust gas purification device can be prevented, and the purification performance can be improved.
- the size of the counterweight can be reduced. As a result, it is possible to improve the backward visibility and the turning performance, and to lower the center of gravity of the counterweight to improve the vehicle stability.
- the engine room means a space for housing the engine, and for example, means a space surrounding the engine from the side by a vehicle body frame provided in the vehicle, and preferably, further above the engine Is a space formed by being covered by the engine cover.
- the exhaust gas purification device may be a flow-through type diesel particulate filter.
- a flow-through type is adopted.
- the wall flow type which has been widely used in the past, has a high collection rate, maintenance frequency is high because soot is deposited.
- the flow-through type since the flow-through type has a structure in which no soot is deposited, the frequency of maintenance is low, and even if the flow-through type is disposed in an engine room where it is difficult for workers to access, problems may be reduced.
- the exhaust pipe of the engine includes a muffler provided downstream of the exhaust gas purification device, the silencer The device is disposed in the engine room. According to this embodiment, by arranging the silencer in the engine room, it is not necessary to provide a space for arranging the silencer on the counterweight. As a result, the size of the counterweight can be further reduced.
- the exhaust gas purification device is configured to dissipate the cooling water of the engine. It is disposed forward of the radiator. According to this embodiment, by arranging the exhaust gas purification device in front of the radiator, the cooling performance of the radiator can be improved without the exhaust gas purification device interfering with the air passing through the radiator.
- the engine in the industrial vehicle according to any one of the above (1) to (4), is mounted on both sides by a bracket attached to a vehicle body frame of the vehicle. It is suspended and supported. According to this embodiment, by suspending and supporting the engine from both sides with respect to the vehicle body frame by the brackets, a space for installing the exhaust gas purification device etc. can be secured below the engine, and in the engine room Efficient layout can be realized.
- the body frame is formed with a rib so as to horizontally project toward the engine
- the bracket is A support member having a horizontal surface fixed to the rib and a vertical surface connected to the horizontal surface, and one end fixed in parallel to the vertical surface and the other end horizontal to the surface of the engine And a fixing member fixed to the housing.
- the exhaust gas purification device is formed by the engine being suspended and supported by the bracket. It is good to be installed in the space below. According to this embodiment, an efficient layout in the engine room can be realized.
- the fuel tank is provided, and the fuel tank is disposed above the counterweight Good to have. According to this embodiment, by disposing the fuel tank in the space above the counterweight formed by the compactification of the counterweight, access to the fuel tank can be facilitated and the burden of maintenance work such as refueling can be reduced. it can.
- the distance between the engine and the exhaust gas purification device can be further shortened by arranging the exhaust gas purification device in the engine room.
- the exhaust gas purification device in the engine room.
- the size of the counterweight can be reduced.
- FIG. 1 is a perspective view showing a structure around an engine of an industrial vehicle according to an embodiment of the invention from below.
- FIG. 1 It is a schematic diagram which shows the arrangement layout of the muffling device in the industrial vehicle which concerns on patent document 1 simply. It is a schematic diagram which shows simply the 1st arrangement layout of the exhaust gas purification device in the industrial vehicle which concerns on patent document 2. As shown in FIG. It is a schematic diagram which shows simply the 2nd arrangement layout of the exhaust gas purification device in the industrial vehicle which concerns on patent document 2. As shown in FIG.
- expressions that indicate that things such as “identical”, “equal” and “homogeneous” are equal states not only represent strictly equal states, but also have tolerances or differences with which the same function can be obtained. It also represents the existing state.
- expressions representing shapes such as quadrilateral shapes and cylindrical shapes not only represent shapes such as rectangular shapes and cylindrical shapes in a geometrically strict sense, but also uneven portions and chamfers within the range where the same effect can be obtained. The shape including a part etc. shall also be expressed.
- the expressions “comprising”, “having”, “having”, “including” or “having” one component are not exclusive expressions excluding the presence of other components.
- FIG. 1 is a schematic side view showing an entire configuration of an industrial vehicle according to an embodiment of the present invention.
- the industrial vehicle is a forklift vehicle having a cargo handling device 11 capable of raising and lowering cargo handling in front of the driver's seat 10.
- a diesel engine (hereinafter appropriately referred to as "engine”) 1 is mounted on a vehicle as a power source, and the motive power is used to drive the vehicle and the cargo handling device 11.
- a fuel tank 12 is disposed above the counterweight 3.
- FIG. 2 is a perspective view showing a structure around an engine of an industrial vehicle according to an embodiment of the present invention from below.
- the engine 1 is housed in an engine room 14 surrounded by a vehicle body frame 13.
- the engine room 14 broadly means a space provided for housing the engine 1 inside the vehicle, and preferably is defined to surround at least a part of the side of the engine 1 by the vehicle body frame 13
- at least a part of the upper part of the engine 1 is covered by an engine cover (not shown).
- the vehicle body frame 13 is provided to extend along both side surfaces of the engine 1 as indicated by reference numerals 13 a and 13 b respectively.
- the engine 1 is suspended and supported by engine mount brackets (hereinafter appropriately referred to as "brackets") 15 provided on the vehicle body frames 13a and 13b.
- engine mount brackets hereinafter appropriately referred to as "brackets"
- DPF 8 exhaust gas purification device
- FIG. 3 is a perspective view showing the vehicle body frame 13 and the bracket 15 extracted from FIG. In FIG. 3, the vehicle body frame 13b is omitted so that the arrangement of the bracket 15 can be easily understood.
- the bracket 15 is provided on the vehicle body frames 13a and 13b, and includes a support member 16 and a fixing member 17 respectively.
- Ribs 22 are provided on the surface of the vehicle body frame 13 so as to protrude horizontally toward the engine 1.
- the horizontal surface 16 a of the support member 16 is fixed to the rib 22 by a plurality of bolts.
- a vertical surface 16 b is connected to the horizontal surface 16 a so as to be substantially orthogonal, and the support member 16 has a substantially L shape.
- the fixing member 17 has one end fixed in parallel to the vertical surface 16 b and the other end fixed in parallel to the surface of the engine 1. More specifically, the fixing member 17 has a fixing surface 17 a provided to face the surface of the engine 1, and is fixed to the engine 1 by a plurality of bolts. A connection surface 17 b is formed on the fixed surface 17 a so as to protrude toward the vehicle body frame 13 side. The connecting surface 17b is bolted to the vertical surface 16b of the support member 16, and in the present embodiment, in particular, it is configured to be boltable from both sides of the vertical surface 16b. By using the bracket 15 having such a structure, the vibrating engine 1 can be firmly fixed to the vehicle body frame 13.
- FIG. 4 is a perspective view showing the structure around the engine housed in the engine compartment 14.
- the engine 1 includes an exhaust turbocharger 18 having an exhaust turbine 18a and a compressor 18b coaxially driven thereby.
- the air taken in from the air supply pipe 19 is compressed and heated by the compressor 18 b and then cooled by an intercooler (not shown) and supplied to the combustion chamber.
- intercooler not shown
- compression ignition combustion is performed, and the exhaust gas generated by the combustion drives the exhaust turbine 18a provided in the exhaust pipe 20 to become a power source of the compressor 18b, and then a diesel particulate filter which is an exhaust purification device (DPF) 8 is supplied.
- DPF exhaust purification device
- the DPF 8 is housed in the engine compartment 14, and is particularly installed in a space formed below the engine 1 (ie, a space formed by suspending and supporting the engine 1 with the bracket 15).
- the exhaust pipe 20 is thus routed toward the DPF 8 installed below the engine 2.
- a bellows pipe 21 which can be expanded and contracted in the extending direction is inserted in a part of the exhaust pipe 20 on the upstream side of the DPF 8 to prevent the vibration of the engine 1 from being transmitted to the downstream side.
- the bellows pipe 21 is preferably inserted into a portion of the exhaust pipe 20 having a linear shape (for example, a portion extending linearly in the vertical direction as shown in FIG. 4).
- the bellows pipe 21 is required to have high durability in order to absorb the vibration of the engine 1, but the vibration transmitted to the diameter of the bellows pipe 21 by the entire circumference by being inserted into a portion having a linear shape is required. Uniform and good durability is obtained.
- a flexible pipe having flexibility may be used.
- the exhaust pipe 20 between the engine 1 and the DPF 8 can be shortened, a decrease in the temperature of exhaust gas introduced into the DPF 8 can be suppressed, and the purification performance can be improved.
- the wall flow type DPF which has been widely spread in the past, collects PM by the exhaust gas passing through the ceramic filter having a honeycomb structure, but while the collection rate is high, the maintenance frequency of the device is high.
- the wall flow type DPF needs to be disposed at a position easily accessible by the operator at the time of maintenance work, and can not be disposed in the engine room 14 as in the present invention.
- a flow-through type DPF is used. Unlike the above-mentioned wall-flow type, the flow-through type DPF has a structure in which no soot is deposited. Therefore, the frequency of maintenance is much lower than that of the wall flow type DPF, and even if it is disposed in the engine room 14 where it is difficult for the operator to access, the adverse effect can be reduced.
- the hydrocarbon (HC) in the exhaust gas is mainly used on the upstream side of the DPF 8 by using the oxygen contained in the exhaust gas.
- unburnt may be provided decomposing oxidation catalyst (DOC) in the oxidized water (H 2 0) and carbon dioxide (CO 2).
- DOC oxidation catalyst
- CO 2 carbon dioxide
- fuel (HC) is injected into the exhaust pipe 20 by the post injection device provided on the upstream side of the DOC, and the fuel contained in the exhaust is oxidized by the DOC to raise the exhaust.
- the accumulated PM is burned and processed by sending warm and high temperature exhaust gas to the DPF 8.
- FIG. 5 is a schematic view showing the peripheral structure of the engine 2 together with the cooling water circuit 23.
- the cooling water heated by the engine 1 is cooled by heat exchange with the outside air at the radiator 2 provided on the cooling water circuit 23.
- Outside air is fed to the radiator 2 by the blower fan 5 which rotates with the driving of the engine 1 to promote heat exchange with the cooling water.
- the air passing through the radiator 2 is discharged to the outside of the vehicle through the vent 6 (see FIG. 7) of the counterweight 3 disposed at the rear.
- the exhaust gas purification device such as the DPF 8 is disposed in the vicinity of the vent hole 6 of the counterweight 3, the air flow is impeded, which causes a decrease in the cooling capacity of the radiator 2.
- the cooling performance of the radiator 2 can be improved by disposing the DPF 8 that may be a hindrance to air blowing in the engine compartment 14 located ahead of the radiator 2 as described above.
- the size of the counterweight 3 can be reduced, the backward visibility and turning performance can be improved, and the center of gravity of the counterweight 3 can be lowered to obtain good vehicle stability.
- the rear view can be improved by setting the height of the counterweight 3 low and setting the length short.
- the outer shape of the counterweight 3 small, the turning radius can be made small, and an industrial vehicle excellent in small turnability can be realized.
- the counterweight 3 can be made compact in this way, access to the fuel tank 12 installed on the counterweight 3 becomes easy, and the burden of maintenance work such as refueling can be reduced.
- FIG. 6 is a perspective view showing a structure around an engine of an industrial vehicle according to an embodiment of the present invention from below.
- a muffler 4 that is a noise reduction device is provided downstream of the DPF 8 in the exhaust pipe 20.
- the muffler 4 is disposed in the space formed at the lower part of the counterweight 3, so it interferes with the air flow from the radiator 2 and contributes to the reduction of the cooling capacity.
- the muffler 4 is also disposed in the engine room 14 in the same manner as the DPF 8.
- the cooling performance can be improved while avoiding the hindrance of the air blowing from the radiator 2.
- the counterweight 3 can be made compact and the center of gravity can be reduced, and turning performance and vehicle stability can be improved.
- the distance between the engine 1 and the DPF 8 can be shortened. Thereby, the temperature fall of the exhaust gas introduced into DPF8 can be prevented, and purification performance can be improved. Further, since it is not necessary to provide the space for arranging the DPF 8 in the counterweight 3, the size of the counterweight 3 can be reduced. Thereby, the rear view and the turning performance can be improved, and the center of gravity of the counterweight 3 can be lowered to improve the vehicle stability.
- At least one embodiment of the present invention is applicable to an industrial vehicle such as a forklift equipped with an exhaust gas purification device for purifying exhaust gas of an engine as a power source.
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Abstract
Description
尚、図7において、マフラー4はエンジンルームの外側に配置されている。
この例では、エンジン1としてディーゼルエンジンが搭載されており、排気浄化装置として、排気ガス中に含まれる未燃焼微細物質(PM)を捕集して浄化を行うディーゼルパティキュレートフィルタ(DPF)8が設けられている。DPF8では、エンジン1からの高温の排気ガスを利用して、蓄積されたPMを燃焼する再生処理を行うことによって浄化性能が維持される。但し、エンジン1及びDPF8間の排気管20が長くなると、DPF8に導入される排気ガスの温度が低下してしまうため問題となる。
また図8Bの例では、DPFの浄化性能を維持するためには作業員による脱着作業を含むメンテナンスが必要なことに鑑みて、DPF8を車両のステップに配置している。これにより、エンジン1及びDPF8間の排気管20を短縮しつつ、作業員によるアクセス性を向上させている。
尚、図8A及び図8Bにおいて破線14はエンジン1が収納されたエンジンルームを示しており、DPF8は当該エンジンルーム14の外側に配置されている。
また図8Bでは、DPF8をステップ内に配置することによって、図8Aに比べてエンジン1及びDPF8間の距離を更に短縮しているが、DPF8は動作時に非常に高温になるため、人手に触れやすいステップに配置することは好ましくない。またステップ内にDPF8の設置スペースを確保することは容易でなく、特に小型車両では困難な場合が多い。また、車体フレームの外側に排気浄化装置を設置すると、組立性を損なうおそれがある。
尚、本願明細書では、エンジンルームはエンジンを収納するためのスペースを意味し、例えば車両に設けられた車体フレームによって側方からエンジンを囲んでいる空間を意味し、好ましくは、更にエンジンを上方からエンジンカバーによって覆われて形成された空間である。
この実施形態によれば、排気浄化装置としてディーゼルパティキュレートフィルタを用いる場合に、フロースルータイプを採用する。従来から普及されているウォールフロータイプは捕集率が高いものの煤が堆積するためにメンテナンス頻度が高くなる。一方、フロースルータイプは煤が堆積しない構造を有しているためメンテナンス頻度が低く、作業者がアクセスしにくいエンジンルーム内に配置しても弊害が少なくて済む。
この実施形態によれば、消音装置をエンジンルーム内に配置することで、カウンターウェイトに消音装置を配置するためにスペースを設ける必要がなくなる。これにより、更なるカウンターウェイトのサイズ縮小を図ることができる。
この実施形態によれば、排気浄化装置をラジエータより前方に配置することによって、排気浄化装置がラジエータを通過した送風の妨げとなることがなく、ラジエータの冷却性能を向上することができる。
この実施形態によれば、車体フレームに対してエンジンを両側面からブラケットで吊り下げ支持することによって、エンジン下方に排気浄化装置等を設置するためのスペースを確保することができ、エンジンルーム内での効率的なレイアウトを実現することができる。
この実施形態によれば、このような支持部材及び固定部材を備えるブラケットを用いてエンジンを吊り下げ支持することによって、振動するエンジンを車体フレーム対して強固に固定することができる。
この実施形態によれば、エンジンルーム内での効率的なレイアウトを実現することができる。
この実施形態によれば、カウンターウェイトのコンパクト化によって形成されたカウンターウェイト上方の空間に燃料タンクを配置することで、燃料タンクへのアクセスを容易とし、給油などのメンテナンス作業負担を軽減することができる。
例えば、「ある方向に」、「ある方向に沿って」、「平行」、「直交」、「中心」、「同心」或いは「同軸」等の相対的或いは絶対的な配置を表す表現は、厳密にそのような配置を表すのみならず、公差、若しくは、同じ機能が得られる程度の角度や距離をもって相対的に変位している状態も表すものとする。
例えば、「同一」、「等しい」及び「均質」等の物事が等しい状態であることを表す表現は、厳密に等しい状態を表すのみならず、公差、若しくは、同じ機能が得られる程度の差が存在している状態も表すものとする。
例えば、四角形状や円筒形状等の形状を表す表現は、幾何学的に厳密な意味での四角形状や円筒形状等の形状を表すのみならず、同じ効果が得られる範囲で、凹凸部や面取り部等を含む形状も表すものとする。
一方、一の構成要素を「備える」、「具える」、「具備する」、「含む」、又は、「有する」という表現は、他の構成要素の存在を除外する排他的な表現ではない。
産業用車両は運転席10の前方に荷役を昇降可能な荷役装置11を有するフォークリフト車両である。車両には動力源としてディーゼルエンジン(以下、適宜「エンジン」と称する)1が搭載されており、その動力を用いて車両走行や荷役装置11の駆動を行っている。
尚、カウンターウェイト3の上方には、燃料タンク12が配置されている。
エンジン1は車体フレーム13で囲まれたエンジンルーム14内に収納されている。ここで,エンジンルーム14は車両内部においてエンジン1を収納するために設けられた空間を広く意味しており、好ましくは車体フレーム13によってエンジン1の側方の少なくとも一部を囲むように規定されているとよく、更に好ましくは、エンジン1の上方の少なくとも一部をエンジンカバー(不図示)によって覆われて形成されているとよい。
ブラケット15は車体フレーム13a及び13bに設けられており、それぞれ支持部材16及び固定部材17から構成されている。
車体フレーム13の表面には、エンジン1に向って水平方向に突出するようにリブ22が設けられている。リブ22には支持部材16の水平面16aが複数のボルトで固定されている。水平面16aには垂直面16bが略直交するように連結されており、支持部材16は略L字形状を有している。
エンジン1は排気タービン18aとこれに同軸駆動されるコンプレッサ18bを有する排気ターボ過給機18を備えている。給気管19から取り込まれた空気は、コンプレッサ18bにて圧縮昇温された後、インタークーラ(不図示)で冷却されて燃焼室に供給される。
燃焼室では圧縮着火燃焼が行われ、燃焼によって発生した排ガスは排気管20に設けられた排気タービン18aを駆動して前記コンプレッサ18bの動力源となった後、排気浄化装置であるディーゼルパティキュレートフィルタ(DPF)8に供給される。
尚、ベローズ配管21に代えて或いは併せて、柔軟性を有するフレキシブル配管を用いてもよい。
一方、本実施例ではフロースルータイプのDPFを使用している。フロースルータイプのDPFは上記ウォールフロータイプとは異なり煤が堆積しない構造を有している。そのため、ウォールフロータイプのDPFに比べて格段にメンテナンス頻度が低く、作業者がアクセスしにくいエンジンルーム14内に配置しても弊害が少なくて済む。
エンジン1で昇温された冷却水は、冷却水回路23上に設けられたラジエータ2にて外気と熱交換することにより冷却される。ラジエータ2には、エンジン1の駆動に伴って回転する送風ファン5によって外気が送り込まれ、冷却水との熱交換が促進される。ラジエータ2を通過した送風は、後方に配置されたカウンターウェイト3の通気口6(図7を参照)を介して車外に放出される。
また、このようにカウンターウェイト3のコンパクト化が可能となるので、カウンターウェイト3上に設置される燃料タンク12へのアクセスが容易になり、給油などのメンテナンス作業負担を軽減することができる。
本実施形態では、排気管20のうちDPF8の下流側に騒音抑制のための消音装置であるマフラー4が設けられている。図7に示すように、従来、マフラー4はカウンターウェイト3の下部に形成されたスペースに配置されていたため、ラジエータ2からの送風の妨げとなり、冷却能力低下の一因となっていた。
一方、本実施形態では図6に示すように、マフラー4もDPF8と同様にエンジンルーム14内に配置されている。これにより、ラジエータ2からの送風の妨げとなることを回避し、冷却性能を向上できる。また、カウンターウェイト3の下部にマフラー4の設置スペースを形成する必要がなくなるので、カウンターウェイト3のコンパクト化及び低重心化を図り、旋回性能や車両安定性を向上できる。
2 ラジエータ
3 カウンターウェイト
4 消音装置(マフラー)
5 送風ファン
6 通気口
8 排気浄化装置(DPF)
9 排気管
10 運転席
11 荷役装置
12 燃料タンク
13 車体フレーム
14 エンジンルーム
15 エンジンマウントブラケット
16 支持部材
17 固定部材
18 排気ターボ過給器
19 給気菅
20 排気管
21 ベローズ配管
22 リブ
Claims (8)
- 車両の前部に設けられた荷役装置と、
前記車両の後部に設けられたカウンターウェイトと、
前記車両の内部において前記カウンターウェイトの前方に形成されたエンジンルーム内に収納されたエンジンと、
前記エンジンルーム内に配置された前記エンジンの排気ガスを浄化するように構成された排気浄化装置と
を備えたことを特徴とする産業用車両。 - 前記排気浄化装置はフロースルータイプのディーゼルパティキュレートフィルタであることを特徴とする請求項1に記載の産業用車両。
- 前記エンジンの排気管において前記排気浄化装置より下流側に設けられた消音装置を備え、
該消音装置は前記エンジンルーム内に配置されていることを特徴とする請求項1又は2に記載の産業用車両。 - 前記排気浄化装置は、前記エンジンの冷却水を放熱するように構成されたラジエータより前方に配置されていることを特徴とする請求項1から3のいずれか一項に記載の産業用車両。
- 前記エンジンは、前記車両が有する車体フレームに取り付けられたブラケットによって両側面から吊り下げ支持されていることを特徴とする請求項1から4のいずれか一項に記載の産業用車両。
- 前記車体フレームには、前記エンジンに向って水平方向に突出するようにリブが設けられており、
前記ブラケットは、
前記リブに固定される水平面、及び、該水平面に連結された垂直面を備える支持部材と、
一端が前記垂直面に対して平行に固定されると共に他端が前記エンジンの表面に対して平行に固定される固定部材と
を備えることを特徴とする請求項5に記載の産業用車両。 - 前記排気浄化装置は、前記エンジンが前記ブラケットによって吊り下げ支持されることで形成される前記エンジンの下方のスペースに設置されていることを特徴とする請求項5又は6に記載の産業用車両。
- 燃料タンクを備え、
該燃料タンクは、前記カウンターウェイトの上方に配置されていることを特徴とする請求項1から7のいずれか一項に記載の産業用車両。
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US20170137268A1 (en) | 2017-05-18 |
EP3176021B1 (en) | 2021-01-13 |
CN106458011A (zh) | 2017-02-22 |
CN106458011B (zh) | 2020-03-31 |
EP3176021A4 (en) | 2018-06-13 |
US10669141B2 (en) | 2020-06-02 |
EP3176021A1 (en) | 2017-06-07 |
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