bulldozer

Abstract

A bulldozer includes a cab, an engine room disposed in front of the cab and having an engine disposed therein, and an exhaust gas aftertreatment device disposed above the engine to purify exhaust gas discharged from the engine.

Description

Technical Field

[0001] Embodiments of the present invention relate to a bulldozer, and more specifically, to a bulldozer in which the engine and exhaust aftertreatment device are efficiently configured inside the engine compartment, thereby reducing interference with the driver's visibility. Background Technology

[0002] Bulldozers are typically a type of construction machinery used to perform tasks such as cutting or pushing soil in an external workspace. Specifically, a blade is installed at the front of the bulldozer, and the operator operates it while observing the conditions of the workspace.

[0003] When the engine compartment is located in front of the cab, the operator may have difficulty assessing the working space in front of the bulldozer due to the limited space within the cab.

[0004] This kind of interference with the operator's field of vision not only affects the result of the work, but also has a great impact on the operator's safety.

[0005] Therefore, bulldozers are required to ensure the operator's visibility by making the configuration of components inside the engine compartment compact.

[0006] Furthermore, a problem exists where heat from the exhaust aftertreatment unit located in the engine compartment is transferred to the engine, causing thermal damage to engine parts. Specifically, the problem is that when the bulldozer is viewed from the front, the exhaust aftertreatment unit is configured to overlap with the engine, causing heat generated in the exhaust aftertreatment unit to be transferred to engine parts. Summary of the Invention

[0007] Technical issues

[0008] Embodiments of the present invention provide a bulldozer that can effectively house the engine and exhaust aftertreatment device inside the engine compartment with reduced interference with the driver's visibility.

[0009] Technical solution

[0010] According to an embodiment of the present invention, a bulldozer includes a cab, the bulldozer including: an engine compartment disposed in front of the cab and housing an engine therein; and an exhaust aftertreatment device disposed above the engine to purify exhaust gases discharged from the engine.

[0011] The bulldozer described above is characterized in that, when viewed from the front of the bulldozer, the exhaust aftertreatment device and the engine are configured without overlap.

[0012] In addition, the bulldozer also includes a first cooling device, which is located in front of the exhaust gas aftertreatment device.

[0013] In addition, the bulldozer may also include a dividing component that divides the engine compartment into an engine mounting area for mounting the engine and an after-treatment device mounting area for mounting the exhaust after-treatment device.

[0014] Furthermore, the exhaust aftertreatment device can be installed in the aftertreatment device installation area, which is divided by the dividing component and spaced apart from the engine.

[0015] Furthermore, the dividing component can be configured to tilt forward.

[0016] In addition, the first cooling device can cool the exhaust gas after-treatment device.

[0017] In addition, the bulldozer may also include a top cover that covers an upper area of ​​the engine compartment and has an upper exhaust port in the area that can discharge air when the first cooling device is in operation.

[0018] In addition, the bulldozer may also include an exhaust pipe supported by the upper cover to guide the exhaust gas that has passed through the exhaust gas after-treatment device.

[0019] In addition, the bulldozer may also include a side cover that covers the side of the engine compartment and has an inspection door that can be opened and closed for maintenance of the engine.

[0020] In addition, the exhaust gas aftertreatment device may include one or more of the following: diesel oxidation catalyst, diesel smoke filtration device, and selective catalytic reduction device.

[0021] Furthermore, the exhaust gas aftertreatment device may include a plurality of reactors, at least one of which is positioned in front of the other reactors, and the outer periphery of the reactor positioned in front is positioned at a relatively lower height than the outer periphery of the other reactors.

[0022] In addition, the bulldozer may also include a top cover that covers the plurality of reactors disposed in the upper part of the engine compartment and is disposed at an angle toward the front.

[0023] In addition, the bulldozer may also include a second cooling device, which is arranged at a distance from the first cooling device with the cab as the center, and is capable of cooling the engine.

[0024] Alternatively, according to an embodiment of the present invention, a bulldozer includes a cab, the bulldozer comprising: an engine compartment disposed in front of the cab; a dividing member that divides the engine compartment; an engine disposed below the dividing member; an exhaust gas aftertreatment device disposed above the dividing member to purify exhaust gas discharged from the engine; and a first cooling device disposed in front of the exhaust gas aftertreatment device and capable of cooling the exhaust gas aftertreatment device.

[0025] In addition, the bulldozer may also include a front grille section, one area of ​​which is located in front of the engine compartment and guides external air inflow to the lower part and the upper part of the dividing member.

[0026] The effects of the invention

[0027] According to embodiments of the present invention, the bulldozer can reduce obstruction to the driver's view and effectively house the engine and exhaust aftertreatment device inside the engine compartment.

[0028] Furthermore, the bulldozers of the embodiments of the present invention can effectively prevent thermal damage to engine parts caused by the high temperature of the exhaust aftertreatment device. Attached Figure Description

[0029] Figure 1 A bulldozer is shown as an embodiment of the present invention.

[0030] Figure 2 Enlarged display Figure 1 Part of region A.

[0031] Figure 3 A portion of the engine compartment of a bulldozer is shown as an embodiment of the present invention.

[0032] Figure 4 The interior of the engine compartment of a bulldozer according to an embodiment of the present invention is shown.

[0033] Figure 5 The diagram illustrates the configuration of the engine compartment of a bulldozer according to an embodiment of the present invention.

[0034] Figure 6 The location of the engine compartment on the main frame of an embodiment of the present invention is shown.

[0035] Figure 7 A first cooling device for a bulldozer is shown according to an embodiment of the present invention.

[0036] Figure 8 The exterior of the engine compartment of a bulldozer according to an embodiment of the present invention is shown.

[0037] Figure 9This illustration shows some components of a second cooling device according to an embodiment of the present invention.

[0038] Figure 10 This image shows one side of the side body of a bulldozer according to an embodiment of the present invention.

[0039] Figure 11 The other side of the side body of a bulldozer is shown in an embodiment of the present invention.

[0040] Figure 12 The front grille of a bulldozer is shown according to an embodiment of the present invention.

[0041] Figure 13 A portion of the engine compartment of a bulldozer according to an embodiment of the present invention is shown from the front.

[0042] Figure Labels

[0043] 100: Cab, 101: Bulldozer, 200: Engine compartment, 201: Aftertreatment device area, 202: Engine area, 210: Engine, 300: Exhaust aftertreatment device, 400: First cooling device, 500: Second cooling device, 700: Dividing component, 810: Upper cover, 811: Upper exhaust outlet, 820: Front grille, 840: Side cover, 841: Inspection door, 900: Exhaust pipe, 310, 320: Reactor. Detailed Implementation

[0044] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can readily implement the invention. The present invention can be implemented in many different ways and is not limited to the embodiments described herein.

[0045] It should be noted that the accompanying drawings are schematic and not to scale. For clarity and convenience, the relative dimensions and proportions of the parts shown in the drawings have been exaggerated or reduced in size; any dimensions are merely exemplary and not limiting. Furthermore, the same reference numerals are used for the same structures, elements, or components appearing in more than two drawings to indicate similar features.

[0046] The embodiments of the present invention specifically illustrate the preferred embodiments of the invention. As a result, a variety of variations of the illustrations are contemplated. Therefore, the embodiments are not limited to the specific manner in which the illustrated areas are shown, and for example, variations in manner caused by manufacturing processes are also included.

[0047] The following reference Figures 1 to 12 A bulldozer 101 according to an embodiment of the present invention will be described.

[0048] The bulldozer 101 includes a cab 100 for the driver to sit in and operate the bulldozer 101.

[0049] like Figures 1 to 6 As shown, a bulldozer 101 according to an embodiment of the present invention includes an engine compartment 200 and an exhaust gas aftertreatment device 300.

[0050] The engine compartment 200 is located in front of the cab 100. Furthermore, an engine 210 is located inside the engine compartment 200. The engine 210 provides power for the operation of the cab 100. Specifically, the engine 210 can provide power to operate pumps or motors, etc.

[0051] The exhaust aftertreatment device 300 can reduce the nitrogen oxides included in the exhaust gas emitted from the engine 210, which generates power by burning fuel, and then discharge it to the outside. That is, the exhaust aftertreatment device 300 can purify the exhaust gas emitted from the engine 210 and discharge it to the outside of the bulldozer 101.

[0052] Furthermore, the exhaust aftertreatment device 300 is positioned in front of the cab 100. Additionally, the exhaust aftertreatment device 300 is positioned above the engine 210.

[0053] With this configuration, a bulldozer 101 according to an embodiment of the present invention can have the engine 210 and the exhaust aftertreatment device 300 compactly arranged in the engine compartment 200 since the exhaust aftertreatment device 300 is arranged above the engine 210.

[0054] In addition, such as Figures 1 to 7 As shown, the bulldozer 101 of one embodiment of the present invention may further include a first cooling device 400.

[0055] like Figure 2 and Figure 3 As shown, the first cooling device 400 is positioned in front of the exhaust gas aftertreatment device 300. Furthermore, the first cooling device 400 is a charged air cooling device (CAC).

[0056] Specifically, such as Figure 7 As shown, the first cooling device 400 includes an electric fan 430, a fan shroud 420, and a CAC core 410.

[0057] The CAC core 410 is located at the front, and a fan cover 420 is provided behind the CAC core 410 to support the electric fan 430.

[0058] CAC core 410 is a pressurized air cooling core. Specifically, the CAC forms a flow path for heat exchange with external gas. CAC core 410 may include fins and tubes. CAC core 410 can cool pressurized air.

[0059] For example, the CAC core 410 can cool the pressurized air supplied to the engine 210.

[0060] Since the first cooling device 400 includes an electric fan 430, the exhaust gas aftertreatment device 300 can be effectively cooled even when it is located behind the exhaust gas aftertreatment device 300 as it operates.

[0061] In addition, such as Figures 2 to 6 As shown, a bulldozer 101 according to an embodiment of the present invention may further include a dividing component 700.

[0062] The dividing component 700 can divide the engine compartment 200. Furthermore, the dividing component 700 can be positioned above the engine 210 to divide the engine compartment 200. Specifically, the dividing component 700 can divide the engine compartment 200 into an area 202 where the engine 210 is located and an area 201 where the exhaust aftertreatment device 300 is located.

[0063] That is, the engine compartment 200 may include an engine mounting area 202 for mounting the engine 210 and an after-treatment device mounting area 201 for mounting the exhaust after-treatment device 300. In addition, the dividing member 700 can divide the engine mounting area 202 and the after-treatment device mounting area 201.

[0064] In addition, the partition component 700 can support the exhaust gas aftertreatment device 300. Specifically, the exhaust gas aftertreatment device 300 can be supported on the partition component 700.

[0065] Therefore, the dividing member 700 can form and support the exhaust aftertreatment device installation area 201 where the exhaust aftertreatment device 300 is installed. Since the dividing member 700 can divide the engine compartment 200, it can prevent hot air generated by the engine installation area 202 where the engine 210 is installed from being transferred to the exhaust aftertreatment device 300 during the operation of the engine 210. In addition, it can also effectively prevent heat generated in the exhaust aftertreatment device 300 from being transferred to the engine 210.

[0066] In addition, such as Figure 2 As shown, in a bulldozer 101 according to an embodiment of the present invention, the exhaust aftertreatment device 300 can be arranged in an area spaced apart from the engine 210.

[0067] The exhaust aftertreatment device 300 can be disposed separately from the engine 210 within the aftertreatment device installation area 201 defined by the dividing component 700. Specifically, the exhaust aftertreatment device 300 is disposed in the aftertreatment device installation area 201 and can be disposed in a space independent of the engine 210.

[0068] In addition, such as Figure 6 As shown, a bulldozer 101 according to an embodiment of the present invention may further include a main frame 110 and a front support frame 120.

[0069] The main frame 110 can be formed to a considerable length in one direction and support the cab 100. Furthermore, a region of the main frame 110 can support the engine 210. That is, the engine 210 can be positioned in front of the main frame 110. Additionally, the main frame 110 can be supported on the running gear 150, allowing the bulldozer 101 to travel in contact with the ground.

[0070] Multiple front support frames 120 can be arranged along the height direction on the sides of the front main frame 110 to support the first cooling device 400 spaced apart from the main frame 110 in the height direction. That is, the multiple front support frames 120 can be arranged spaced apart from each other in the width direction of the main frame 110 to support the first cooling device 400. Specifically, the front support frames 120 can support the first cooling device 400 in a manner that positions it in front of the main frame 110 relative to the engine 210.

[0071] In addition, the front support frame 120 can also support one side of the dividing component 700. Specifically, the other side of the dividing component 700 can be supported by the rear cover 830 located behind the engine compartment 200.

[0072] For example, such as Figure 4 and Figure 5 As shown, the first cooling device 400 and the exhaust gas aftertreatment device 300 can be configured together in the upper region of the engine compartment 200 divided by the partition component 700.

[0073] In addition, such as Figures 2 to 6 As shown, the dividing member 700 of one embodiment of the present invention can be configured to tilt forward.

[0074] The dividing member 700 can be arranged at an angle towards the front. Specifically, the side of the cab 100 that is relatively far away from the cab 100 can be arranged at an angle relative to the end adjacent to the main frame 110. That is, the other side of the dividing member 700 that supports the rear cover 830 can be arranged relatively far away from the main frame 110 in the height direction relative to one side of the dividing member 700.

[0075] Furthermore, the first cooling device 400 can be arranged in the upper part of the engine compartment 200 along the inclined length direction of the dividing member 700. That is, inside the engine compartment 200, the first cooling device 400 and the exhaust gas aftertreatment device 300 can be arranged in the upper part of the engine compartment 200, and the engine 210 can be arranged in the lower part of the engine compartment 200.

[0076] Therefore, since the exhaust aftertreatment device 300 is mounted on the partition member 700 which is inclined forward, the partition member 700 can effectively support the exhaust aftertreatment device 300 even when the driver is sitting in the cab 100, without interfering with the driver's view.

[0077] In addition, such as Figure 4 As shown, in one embodiment of the present invention, the first cooling device 400 can cool the exhaust gas aftertreatment device 300.

[0078] When the temperature of the exhaust gas aftertreatment device 300 and its exhaust gas is high, the first cooling device 400 can operate the electric fan 430 to cool the exhaust gas aftertreatment device 300 with external air.

[0079] Specifically, the exhaust gas temperature (not shown) or the status of the exhaust gas aftertreatment device 300 can be detected by a detection component, and the control unit can receive information from such a detection component and operate the electric fan 430 according to the preset conditions to help cool the exhaust gas aftertreatment device 300.

[0080] For example, even if the bulldozer 101 is shut down, if the exhaust gas after-treatment device 300 has a high temperature due to the forced regeneration operation of the exhaust gas after-treatment device 300, the first cooling device 400 can still effectively prevent the exhaust gas after-treatment device 300 from being placed at a high temperature by running the electric fan 430 to cool the exhaust gas after-treatment device 300.

[0081] In addition, such as Figure 4 , Figure 8 and Figure 12 As shown, a bulldozer 101 according to an embodiment of the present invention may further include an upper cover 810.

[0082] The upper cover 810 can cover an upper region of the engine compartment 200. An upper exhaust port 811 can be formed on the upper cover 810. Specifically, through the upper exhaust port 811 formed in a region of the upper cover 810, external air flowing in with the operation of the first cooling device 400 can be discharged to the outside after cooling the exhaust gas aftertreatment device 300. That is, the upper cover 810 can cover an upper region of the engine compartment 200 adjacent to the driver's cab 100.

[0083] For example, multiple upper exhaust outlets 811 may be formed on the upper cover 810. In addition, the upper exhaust outlets 811 may be formed in an area of ​​the upper cover 810 that is closer to the cab 100 than the first cooling device 400.

[0084] In addition, such as Figure 4 , Figure 8 and Figure 12 As shown, the upper cover 810 can be divided by the dividing component 700 and covers at least a portion of the upper part of the engine compartment 200 where the exhaust aftertreatment device 300 is installed. Specifically, for the upper cover 810, an area relatively far from the cab 100 is inclined in a direction relative to one end of the main frame 110, thereby preventing obstruction of the driver's view.

[0085] Specifically, one of the cylindrical reactors 310 and 320 included in the exhaust gas aftertreatment device 300 may be positioned in front of the other reactors 320. Furthermore, the height of the outer periphery of one reactor 310 may be relatively lower than the outer periphery of the other reactors 320.

[0086] That is, reactors 310 and 320 are arranged at an angle along the length of bulldozer 101. Corresponding to the configuration of the plurality of reactors 310, 320, the upper cover 810 can be tilted to cover at least a portion of the upper part of the engine compartment 200 to prevent obstruction of the driver's view.

[0087] In other words, the tilted configuration of the multiple reactors 310 and 320 also prevents interference with the driver's visibility.

[0088] In addition, such as Figure 1 and Figure 12 As shown, the bulldozer 101 of one embodiment of the present invention may further include an exhaust pipe 900.

[0089] The exhaust pipe 900 can be supported by the upper cover 810. Furthermore, the exhaust pipe 900 can guide the exhaust gas that has passed through the exhaust gas aftertreatment device 300 to the outside. Additionally, the exhaust pipe 900 can be offset to one side along the width direction of the upper cover 810.

[0090] For example, an upper exhaust port 811 may be formed in a region adjacent to the exhaust pipe 900 of the upper cover 810.

[0091] In addition, such as Figure 8 As shown, a bulldozer 101 according to an embodiment of the present invention may further include a side cover 840.

[0092] The side cover 840 can cover the side of the engine compartment 200. Furthermore, an openable and closable inspection door 841 can be configured in a region of the side cover 840. Specifically, the side cover 840 can be configured to open and close a region on the side of the engine mounting area 202.

[0093] Inspection door 841 is disposed on side cover 840 to improve accessibility for operators when maintaining engine 210. Specifically, inspection door 841 is disposed on side cover 840 below dividing part 700 and is configured to allow operators easy access to the injectors and other components of engine 210 for inspection and maintenance when it is open.

[0094] Therefore, since the inspection door 841 is located on the side cover 840, the operator can still effectively inspect and maintain the engine 210 even without opening the entire side cover 840.

[0095] In addition, such as Figure 5 and Figure 6 As shown, an embodiment of the waste gas aftertreatment device 300 of the present invention may include reactors 310 and 320.

[0096] Reactors 310 and 320 may be internally equipped with selective catalytic reduction catalysts. These catalysts can reduce nitrogen oxides in the exhaust gas for discharge outside the bulldozer 101.

[0097] For example, the exhaust gas aftertreatment device 300 may include multiple reactors 310, 320.

[0098] Furthermore, reactors 310 and 320 can be arranged in a direction intersecting the length direction of the main frame 110. Specifically, reactors 310 and 320 can be arranged on the dividing member 700 in a direction intersecting the length direction of the dividing member 700.

[0099] For example, a diesel oxidation catalyst (DOC) may be provided in reactor 310, which is arranged relatively adjacent to the first cooling device 400 among multiple reactors 310, 320. When exhaust gas flows in, the diesel oxidation catalyst can oxidize harmful emission substances included in the exhaust gas and remove particulate and gaseous substances. Specifically, the diesel oxidation catalyst can oxidize carbon monoxide or hydrocarbons into carbon dioxide or water.

[0100] In addition, a diesel soot filter 321 (DPF) and a selective catalytic reduction (SCR) device 322 can be installed in the reactor 320.

[0101] Diesel soot filtration devices can reduce particulate matter (PM) in exhaust gases. Furthermore, selective catalytic reduction devices can reduce nitrogen oxides (NOx) in exhaust gases, allowing NOx-reduced exhaust gases to be emitted to the outside.

[0102] That is, the exhaust gas from engine 210 can be discharged to the outside after nitrogen oxides are reduced by diesel oxidation catalyst, diesel soot filter and selective catalytic reduction device.

[0103] In addition, such as Figure 1 and Figure 3 As shown, in one embodiment of the present invention, the exhaust gas aftertreatment device 300 can be positioned at the rear relative to the foremost end of the engine 210.

[0104] At this point, the foremost end can be the foremost end along the length of the main frame 110.

[0105] The foremost end of the exhaust aftertreatment device 300 can be positioned relative to the foremost end of the engine 210 and adjacent to the cab 100, thereby effectively placing the first cooling device 400 in front of the exhaust aftertreatment device 300.

[0106] In addition, such as Figures 3 to 5 As shown, the foremost end of the first cooling device 400 can be positioned forward relative to the foremost end of the engine 210. Specifically, the CAC core 410 can be positioned forward relative to the foremost end of the engine 210.

[0107] In addition, such as Figure 1 and Figures 9 to 11 As shown, the bulldozer 101 of one embodiment of the present invention may further include a second cooling device 500.

[0108] like Figure 1 As shown, the second cooling device 500 can be configured separately from the first cooling device 400 with the cab 100 as the center.

[0109] Furthermore, the second cooling device 500 can cool the engine 210. Specifically, the second cooling device 500 can cool the fluids required for the operation or cooling of the engine 210. Additionally, the second cooling device 500 can be used to cool the engine 210 via cooling oil. That is, the second cooling device 500 can be connected to the engine 210 and pipes (not shown) to cool the engine 210, such as oil, and then supply it to the engine 210.

[0110] The second cooling device 500 can be configured at the rear of the main frame 110.

[0111] For example, the second cooling device 500 is located behind the cab 100, and can be used as follows: Figure 1 and Figures 9 to 11The device shown includes a cooling module 510 with a radiator and an oil cooler, a rear cooling fan 520, a fan guard 530, a hydraulic fan motor 540, and a rear grille 550.

[0112] The fluid passes through the cooling module 510, where it exchanges heat with the external gas, thereby cooling the fluid. After being cooled, the fluid inside the cooling module 510 can be supplied to the engine 210 to cool the engine.

[0113] A fan guard 530 can be configured between the rear cooling fan 520 and the rear grille 550. The fan guard 530 prevents foreign matter from entering the rear cooling fan 520 and supports the hydraulic fan motor 540. That is, the fan guard 530 protects the rear cooling fan 520 and supports it in a manner that allows the rear cooling fan 520 to be driven by the hydraulic fan motor 540.

[0114] The rear grille 550 can be configured at the rear of the bulldozer 101. The rear grille 550 can prevent external foreign matter from entering the fan guard 530 or the rear cooling fan 520, and guide the external air cooling the cooling module 510 to be discharged to the outside of the bulldozer 101.

[0115] The cooling module 510 and the rear cooling fan 520 can be mounted on the main frame 110. The rear end of the main frame 110 can extend along the length of the main frame 110 relative to the rear end of the traveling body 150.

[0116] In addition, such as Figure 1 As shown, a bulldozer 101 according to an embodiment of the present invention may further include an oil tank 910 and a fuel tank 920.

[0117] The oil tank 910 can be installed on the main frame 110 below the cab 100. The oil tank 910 can supply oil to the drive unit via the hydraulic pressure required to drive the bulldozer 101. Specifically, the oil tank 910 can supply the working oil required for the operation of the bulldozer 101 to the pump. That is, the oil tank 910 can store the working oil to be supplied to the pump.

[0118] The fuel tank 920 can supply the fuel required for combustion of the engine 210. In addition, the fuel tank 920 can be configured on the main frame 110 between the second cooling device 500 and the fuel tank 910.

[0119] Specifically, the fuel tank 910 and the fuel tank 920 can be installed on the main frame 110 at the lower part of the cab 100.

[0120] In addition, such as Figure 10 and Figure 11As shown, a bulldozer 101 according to an embodiment of the present invention may further include a side body 600.

[0121] The side body 600 is mounted on the main frame 110 and can extend to both sides of the cab 100 in a protruding configuration. Furthermore, the equipment required for the bulldozer 101 can be installed inside the side body 600. Specifically, the side body 600 can be positioned on the sides and rear of the cab 100, forming a space that allows for the installation of equipment necessary for the operation of the bulldozer 101.

[0122] Side intake ports 610 can be formed on both sides of the side body 600. External gas flowing into the side intake ports 610 can be cooled by the second cooling device 500 and then discharged through the rear grille 550.

[0123] With the operation of the rear cooling fan 520, external gas flowing in from the side intakes 610 on both sides passes through the cooling module 510 and, after exchanging heat with the fluid inside the cooling module 510, is discharged to the outside of the bulldozer 101 through the rear grille 550.

[0124] For example, when bulldozer 101 is viewed from the side, such as Figure 1 , Figure 10 and Figure 11 As shown, an outer region of the rear grille 550 may protrude relative to the side body 600. Specifically, an outer region of the rear grille 550 may be positioned rearward relative to the side body 600.

[0125] In addition, such as Figure 12 As shown, a bulldozer 101 according to an embodiment of the present invention may further include a front grille section 820.

[0126] Regarding the front grille section 820, a region is provided in front of the engine compartment 200, and it can guide external air into the engine compartment 200. Specifically, through the front grille section 820, external air can be guided downward and upward with the dividing member 700 as the center.

[0127] Furthermore, the remaining area of ​​the front grille 820 can be configured on the upper part of the engine compartment 200. Specifically, the remaining area of ​​the front grille 820 can cover the remaining area of ​​the upper part of the engine compartment 200 that cannot be covered by the upper cover 810.

[0128] Furthermore, the remaining area of ​​the front grille portion 820 may cover the upper area of ​​the first cooling device 400. Additionally, front inlets 821 and 822 may be formed in the remaining area of ​​the front grille portion 820 to guide the inflow of external gas toward the upper part of the dividing member 700 and the first cooling device 400.

[0129] Specifically, the front inlet 821, 822 may include a first inlet 822 formed adjacent to the engine 210 in the front grille section 820 to configure the grille, and a second inlet 821 formed in the front grille section 820 relative to the first cooling device 400 of the engine 210.

[0130] For example, such as Figure 12 As shown, the front grille portion 820 can be configured to cover the front of the engine compartment 200 to the upper part of the engine compartment 200. That is, the front grille portion 820 can be configured to be substantially rotatable. shape.

[0131] In addition, such as Figure 13 As shown, a bulldozer 101 according to an embodiment of the present invention can be configured such that, when viewed from the front of the bulldozer 101, the exhaust aftertreatment device 300 and the engine 210 do not overlap with each other. Specifically, when viewed from the front of the bulldozer 101 in a direction parallel to the length direction of the main frame 110, the exhaust aftertreatment device 300 can be configured not to overlap with the engine 210.

[0132] When viewed from the front of the bulldozer 101, the exhaust aftertreatment device 300 and the engine 210 can be configured to be spaced apart from each other so as not to overlap. Specifically, the exhaust aftertreatment device 300 can be positioned above the engine 210 and configured so that the engine 210 and the exhaust aftertreatment device 300 do not overlap. When viewed from the front of the bulldozer 101, the reactors 310 and 320 can be spaced apart from the engine 210, which has a combustion chamber formed inside.

[0133] That is, when the bulldozer 101 is viewed from the front with the front grille 820, the first cooling device 400, and the dividing component 700 removed, as shown... Figure 13 As shown, the exhaust aftertreatment device 300 can be configured not to overlap with the engine 210.

[0134] Therefore, the exhaust aftertreatment device 300 and the engine 210 can be installed independently of each other in the engine compartment 200 in areas separated by the partition components 700.

[0135] Thus, the exhaust aftertreatment device 300 and the engine 210 can be cooled independently of each other. That is, the bulldozer 101 of one embodiment of the present invention can effectively prevent the heat from the exhaust aftertreatment device 300 from affecting the engine 210 or from the heat generated in the engine 210 being transferred to the exhaust aftertreatment device 300.

[0136] In addition, such as Figure 2As shown, the exhaust aftertreatment device 300 and the engine 210 can be configured so that they do not overlap even when viewed from the side of the engine compartment 200 of the bulldozer 101.

[0137] like Figure 2 As shown, the exhaust aftertreatment device 300 can be positioned above the engine 210. Furthermore, as... Figure 2 As shown, the exhaust aftertreatment device 300 can be positioned above the engine 210. Specifically, the exhaust aftertreatment device 300 can be configured so that it does not overlap with one end of the cylinder head cover 211, which is supported on the upper part of the engine 210 and generates power by forming a combustion chamber inside, even when viewed from the side of the engine compartment 200. That is, the reactor 310 of the exhaust aftertreatment device 300 can be positioned above the engine 210 relative to a virtual line a parallel to the main frame 110 on the direction from which the cylinder head cover 211 of the engine 210 is located on the upper part of the engine 210. Specifically, the engine 210 can include a cylinder block, a cylinder head, and a cylinder head cover 211, which form a combustion chamber inside.

[0138] That is, the exhaust aftertreatment device 300 can be configured in a way that does not overlap with the engine 210 when viewed from the front of the bulldozer 101 in a direction parallel to the upper surface of the cylinder head cover 211 of the engine 210.

[0139] In addition, such as Figure 5 As shown, the dividing component 700 of one embodiment of the present invention may include a traction ring 710.

[0140] The traction ring 710 can be disposed on the dividing member 700, protruding toward the upper cover 810. In addition, the traction ring 710 is formed with a through hole, so that it can be formed into a rope or wire for easy installation for pulling the dividing member 700.

[0141] Furthermore, multiple traction rings 710 can be formed in the partition component 700, allowing the partition component 700 to be stably removed from the engine compartment 200. Since the partition component 700 supports the exhaust aftertreatment device 300, the exhaust aftertreatment device can be easily maintained and replaced by removing the partition component 700.

[0142] Specifically, the dividing component 700 is fastened to the rear cover 830 and the front support frame 120 within the engine compartment 200 by detachable bolts and nuts, etc. When disassembly is required, the support structure can be removed from the rear cover 830 and the front support frame 120.

[0143] For example, multiple traction rings 710 may be spaced apart from each other along the length direction and the width direction of the dividing member 700.

[0144] With this configuration, a bulldozer 101 according to an embodiment of the present invention can efficiently and compactly house the engine 210 and the exhaust aftertreatment device 300 inside the engine compartment 200.

[0145] In addition, a first cooling device 400 and a second cooling device 500 can be effectively installed in the bulldozer 101.

[0146] Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical concept or essential features of the present invention.

[0147] Therefore, the embodiments described above should be understood in all respects as exemplary rather than limiting, and the scope of the invention is embodied in the claims described below. All changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as falling within the scope of the invention.

Claims

1. A bulldozer comprising a cab, characterized in that it includes: An engine compartment is located in front of the driver's cab and houses the engine inside. An exhaust gas aftertreatment device is disposed above the engine to purify the exhaust gas discharged from the engine; as well as The engine compartment is divided into an engine mounting area for housing the engine and an exhaust aftertreatment device mounting area for housing the exhaust aftertreatment device, such that the exhaust aftertreatment device is spaced apart from the engine and supported in the exhaust aftertreatment device mounting area.

2. The bulldozer according to claim 1, characterized in that, When viewed from the front of the bulldozer, the exhaust aftertreatment device and the engine are configured without overlap.

3. The bulldozer according to claim 1, characterized in that, It also includes a first cooling device, which is positioned in front of the exhaust gas aftertreatment device.

4. The bulldozer according to claim 1, characterized in that, The dividing components are arranged at an angle towards the front.

5. The bulldozer according to claim 3, characterized in that, The first cooling device is capable of cooling the exhaust gas after-treatment device.

6. The bulldozer according to claim 5, characterized in that, It also includes an upper cover that covers an upper region of the engine compartment and has an upper exhaust port in the region that allows air to be discharged in the event of operation of the first cooling device.

7. The bulldozer according to claim 6, characterized in that, It also includes an exhaust pipe, which is supported by the upper cover to guide the exhaust gas that has passed through the exhaust gas after-treatment device.

8. The bulldozer according to claim 1, characterized in that, It also includes a side cover that covers the side of the engine compartment and has an inspection door that can be opened and closed for maintenance of the engine.

9. The bulldozer according to claim 1, characterized in that, The exhaust gas aftertreatment device includes one or more of the following: diesel oxidation catalyst, diesel smoke filtration device, and selective catalytic reduction device.

10. The bulldozer according to claim 1, characterized in that, The waste gas after-treatment device includes multiple reactors. At least one of the plurality of reactors is positioned in front of the other reactors, and the outer periphery of the reactor positioned in front is positioned at a relatively lower height than the outer periphery of the other reactors.

11. The bulldozer according to claim 10, characterized in that, It also includes an upper cover that covers the plurality of reactors disposed in the upper part of the engine compartment and is disposed at an angle toward the front.

12. The bulldozer according to claim 3, characterized in that, It also includes a second cooling device, which is arranged at a distance from the first cooling device with the cab as the center, and is capable of cooling the engine.

13. A bulldozer comprising a cab, characterized in that it includes: An engine compartment is located in front of the driver's cab; The partition divides the engine compartment into an upper after-treatment device area and a lower engine area. An engine, which is disposed in the engine mounting area defined by the dividing component; An exhaust gas aftertreatment device, which is separated from the engine and disposed in an aftertreatment device installation area defined by the dividing member, to purify the exhaust gas discharged from the engine; and A first cooling device is disposed in front of the exhaust gas aftertreatment device and is capable of cooling the exhaust gas aftertreatment device.

14. The bulldozer according to claim 13, characterized in that, It also includes a front grille section, one area of ​​which is located in front of the engine compartment and guides external air inflow toward the lower part and the upper part of the dividing member.

15. A bulldozer comprising a cab, characterized in that it includes: An engine compartment is located in front of the driver's cab and houses the engine inside. An exhaust gas aftertreatment device is disposed above the engine to purify the exhaust gas discharged from the engine; as well as The dividing component, which is arranged at an angle downwards in the forward direction, divides the engine compartment into an engine mounting area where the engine is mounted and an after-treatment device mounting area where the exhaust after-treatment device is mounted.

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