JP6576861B2 - Asphalt finisher - Google Patents

Description

  The present invention relates to an asphalt finisher equipped with an engine.

  A self-propelled asphalt finisher driven by a diesel engine is known (see Patent Document 1).

  The diesel engine mounted on this asphalt finisher emits exhaust gas containing nitrogen oxides.

JP 2014-139389 A

  However, Patent Document 1 does not mention purification of exhaust gas.

  In view of the above, it is desired to provide an asphalt finisher capable of purifying exhaust gas.

An asphalt finisher according to an embodiment of the present invention includes a tractor, a hopper installed on the front side of the tractor, a conveyor that conveys the paving material in the hopper to the rear side of the tractor, and a road surface that is conveyed by the conveyor. A screw that spreads pavement material spread in the vehicle width direction, a screed that spreads the pavement material spread by the screw on the rear side of the screw, and a driver seat provided at the upper part of the tractor; , an engine mounted in an engine compartment formed in a front side of the tractor of the driver's seat, the disposed engine compartment, and a cooling fan disposed adjacent the vehicle width direction with respect to the engine the arranged in the engine compartment, and provided with an exhaust gas treatment device for purifying exhaust gas of the engine, the exhaust gas and the cooling fan Processing device is arranged in the vehicle width direction with respect to the traveling direction, and wherein the exhaust gas treatment device is arranged downstream of the cooling fan to receive air by the cooling fan.

  By the above means, an asphalt finisher capable of purifying exhaust gas is provided.

It is a figure of the asphalt finisher which concerns on the Example of this invention. It is a figure which shows the structural example of the exhaust-gas processing system mounted in the asphalt finisher of FIG. It is a figure which shows the example of arrangement | positioning of the exhaust-gas processing apparatus in an engine room. It is the elements on larger scale of an exhaust pipe. It is a figure which shows another example of arrangement | positioning of the exhaust-gas processing apparatus in an engine room. It is a figure which shows another example of arrangement | positioning of the exhaust-gas processing apparatus in an engine room. It is a figure of the asphalt finisher which shows another example of arrangement of a urea water tank. It is a figure of the asphalt finisher which shows another example of arrangement of a urea water tank. It is a figure of the asphalt finisher which shows another example of arrangement of a urea water tank. It is a figure of the asphalt finisher which shows another example of arrangement of a urea water tank.

  FIG. 1 is a diagram of an asphalt finisher 100 that is an example of a road machine according to an embodiment of the present invention. Specifically, FIG. 1A is a left side view, and FIG. 1B is a top view.

  The asphalt finisher 100 mainly includes a tractor 1, a hopper 2, and a screed 3.

  The tractor 1 is a mechanism for running the asphalt finisher 100. In this embodiment, the tractor 1 moves the asphalt finisher 100 by rotating the front wheels 4 and the rear wheels 5 using a traveling hydraulic motor. The traveling hydraulic motor rotates upon receiving hydraulic oil supplied from a hydraulic pump driven by the engine 6. The tractor 1 is equipped with an engine 6, an exhaust gas processing device 7, a fuel tank 8, a urea water tank 9, and the like.

  The engine 6 and the exhaust gas treatment device 7 are installed in the engine room. The engine chamber is formed in the + X side (front side) portion of the tractor 1. In the present embodiment, in the engine room, the engine 6 is disposed on the −Y side (left side), and the exhaust gas treatment device 7 is disposed adjacent to the + Y side (right side) of the engine 6.

  The upper surface of the engine chamber is partially covered with an engine hood 1a indicated by hatching, and the side surface is covered with an exterior cover 1b. The engine 6 and the exhaust gas treatment device 7 are disposed in the engine hood 1a. The engine hood 1a is configured to be openable and closable, and a ventilation hole is formed on the surface thereof. The exterior cover 1b is configured not to be openable or closable, and has a vent hole formed on the surface thereof. In the present embodiment, a part of the engine hood 1a is made of punching metal, and another part has a ventilation louver. The exterior cover 1b has a ventilation louver.

  The fuel tank 8 and the urea water tank 9 are installed in the tank chamber. The tank chamber is formed on the + X side (front side) of the tractor 1 and on the −Z side (lower side) of the engine chamber. In this embodiment, in the tank chamber, the fuel tank 8 and the urea water tank 9 are arranged on the −Y side (left side), and the urea water tank 9 is arranged adjacent to the −X side (rear side) of the fuel tank 8. The Therefore, the urea water tank 9 is disposed between the rear wheel 5 and the fuel tank 8 in a top view.

  The hopper 2 is a mechanism for receiving a paving material. In this embodiment, the hopper cylinder 2a is configured to be opened and closed in the Y-axis direction (vehicle width direction). The asphalt finisher 100 normally receives the pavement material (for example, asphalt mixture) from the loading platform of the dump truck as the pavement material transport vehicle with the hopper 2 fully opened. The paving material received in the hopper 2 is fed to the screed 3 using the conveyor 10 and the screw 11.

  The conveyor 10 conveys the paving material in the hopper 2 to the −X side (rear side) of the tractor 1. The screw 11 spreads the pavement material conveyed by the conveyor 10 and wound on the road surface in the Y-axis direction (vehicle width direction).

  The screed 3 is a mechanism for spreading and leveling the paving material. In this embodiment, the screed 3 is a floating screed pulled by the tractor 1 and is connected to the tractor 1 via the leveling arm 3a.

  FIG. 2 is a diagram illustrating a configuration example of an exhaust gas treatment system 150 mounted on the asphalt finisher 100 of FIG. The exhaust gas treatment system 150 purifies exhaust gas discharged from the engine 6 that is a diesel engine.

  The exhaust gas processing device 7 is a device that purifies exhaust gas of the engine 6 in stages, and includes a first processing unit 7a and a second processing unit 7b. The 1st process part 7a is a diesel particulate filter which collects the particulate matter in exhaust gas, for example. The second processing unit 7b is, for example, a selective reduction catalyst that reduces and removes NOx in the exhaust gas.

  The selective reduction catalyst as the second processing unit 7b receives the supply of the reducing agent and continuously reduces and removes NOx in the exhaust gas. In this embodiment, urea water (urea aqueous solution) is used as a reducing agent for ease of handling.

  The air introduced into the intake pipe 6b through the air filter 6a passes through the turbocharger 61 and the intercooler 65 and is supplied to the engine 6. The exhaust gas from the engine 6 passes through the turbocharger 61, reaches the exhaust pipe 6c downstream thereof, is purified by the exhaust gas processing device 7, and is discharged into the atmosphere.

  A first processing unit 7 a and a second processing unit 7 b of the exhaust gas processing device 7 are connected in series to the exhaust pipe 6 c via a connection unit 63. The connecting portion 63 is provided with a urea water injection device 68 for supplying urea water to the selective reduction catalyst. The urea water injection device 68 is connected to the urea water tank 9 via a urea water hose 69.

  A supply module SM is provided in the middle of the urea water hose 69. The supply module SM includes a urea water supply pump 70 and a filter 71. In the present embodiment, the supply module SM is configured such that a filter 71 is disposed between the urea water tank 9 and the urea water supply pump 70.

  The urea water stored in the urea water tank 9 is supplied to the urea water injection device 68 by the urea water supply pump 70, and upstream of the second processing unit 7b (selective reduction catalyst) in the exhaust pipe 6c from the urea water injection device 68. It is injected toward the position.

  The urea water injected from the urea water injection device 68 is supplied to the selective reduction catalyst. The supplied urea water is hydrolyzed at the selective reduction catalyst to generate ammonia. This ammonia reduces NOx contained in the exhaust gas. In this way, exhaust gas purification is performed.

  The first NOx sensor 72 and the second NOx sensor 73 are sensors that detect the NOx concentration in the exhaust gas. In the present embodiment, the first NOx sensor 72 is disposed on the upstream side of the urea water injection device 68, and the second NOx sensor 73 is disposed on the downstream side of the selective reduction catalyst.

  The urea water remaining amount sensor 74 is a sensor that detects the urea water remaining amount in the urea water tank 9. In this embodiment, the urea water remaining amount sensor 74 is disposed at the upper part of the urea water tank 9.

  The first NOx sensor 72, the second NOx sensor 73, the urea water remaining amount sensor 74, the urea water injection device 68, and the urea water supply pump 70 are connected to the exhaust gas controller 75. The exhaust gas controller 75 controls the urea water injection device 68 and the urea water supply pump 70 based on the NOx concentrations detected by the first NOx sensor 72 and the second NOx sensor 73, respectively, and an appropriate amount of urea water is injected. Like that.

  Further, the exhaust gas controller 75 calculates the ratio of the urea water remaining amount to the total volume of the urea water tank 9 based on the urea water remaining amount output from the urea water remaining amount sensor 74. In this embodiment, the ratio of the remaining amount of urea water to the total volume of the urea water tank 9 is the urea water remaining ratio. For example, the urea water remaining ratio of 50% represents that urea water half of the capacity of the urea water tank 9 remains in the urea water tank 9.

  The exhaust gas controller 75 is connected to an engine control module (hereinafter referred to as “ECM”) 60 via communication means. The ECM 60 is a device that controls the engine 6. The ECM 60 is connected to the main controller 76 via communication means, and the main controller 76 is connected to a monitor 77 (display device) via communication means. The monitor 77 can display warnings, operating conditions, and the like.

  The ECM 60, the exhaust gas controller 75, and the main controller 76 are arithmetic devices each including a CPU, RAM, ROM, input / output port, storage device, and the like. The main controller 76 can use various types of information related to the exhaust gas processing system 150 that the exhaust gas controller 75 has.

  The exhaust gas treatment system 150 has a heat supply mechanism that supplies heat to the urea water tank 9 and the urea water hose 69. The heat supply mechanism is, for example, a mechanism for preventing freezing of urea water in a cold region or dissolving frozen urea water. In this embodiment, engine coolant (for example, long life coolant) of the engine 6 that passes through the coolant hose 80 is used.

  Specifically, the engine coolant immediately after cooling the engine 6 reaches the second portion 82 through the first portion 81 of the coolant hose 80 while maintaining a relatively high temperature. The second portion 82 is a part of the cooling water hose 80 that contacts the outer surface of the urea water tank 9. When the engine cooling water having a temperature higher than that of the urea water flows through the second portion 82, heat is supplied to the urea water tank 9 and the urea water in the urea water tank 9.

  Thereafter, the engine coolant reaches the third portion 83 and the supply module SM. The third portion 83 is a part of the cooling water hose 80 that is in close contact with the urea water hose 69. When the engine cooling water having a temperature higher than that of the urea water flows through the third portion 83 of the cooling water hose 80 along the urea water hose 69, the engine cooling water supplies heat to the urea water hose 69 and the urea water therein. Further, the engine cooling water having a temperature higher than that of the urea water flows into the supply module SM (including the urea water supply pump 70 and the filter 71) and the urea water in the inside thereof when flowing through the flow path formed in the supply module SM. Supply heat.

  Thereafter, the engine coolant that has reached a relatively low temperature after finishing the supply of heat in the second portion 82 and the third portion 83 reaches the heat exchanger unit 13 through the fourth portion 84 of the coolant hose 80. The fourth portion 84 is a part of the cooling water hose 80 routed between the third portion 83 and the heat exchanger unit 13, and does not adhere to the urea water hose 69.

  The fifth portion 85 is a part of the cooling water hose 80 used for cooling the urea water injection device 68. When the engine coolant having a temperature lower than that of the high temperature urea water injection device 68 flows through the fifth portion 85, the engine water takes heat from the high temperature urea water injection device 68 and cools the urea water injection device 68 to prevent overheating. . After that, when the engine cooling water that has been supplied with heat and has a relatively high temperature (higher than the urea water) flows through the sixth portion 86 (a part of the fifth portion 85) along the urea water hose 69, Heat is supplied to the urea water hose 69 and the urea water therein. When the urea water injection device 68 is in a low temperature state, the engine coolant having a temperature higher than that of the urea water injection device 68 in the low temperature state flows through the fifth portion 85, and the urea water injection device 68 and the urea water in the inside thereof. To supply heat. Thereafter, the engine coolant that has reached a relatively low temperature after the supply of heat in the sixth portion 86 has merged with the engine coolant that has flowed through the third portion 83, and then passes through the fourth portion 84 to generate heat. The switch unit 13 is reached.

  In this way, the heat supply mechanism supplies heat to the urea water tank 9, the urea water hose 69, the supply module SM, and the urea water injection device 68 using the engine cooling water, and the urea water inside them. Is prevented from being frozen, or frozen urea water is dissolved.

  Next, the arrangement of the exhaust gas treatment device 7 in the engine compartment will be described with reference to FIG. FIG. 3 is a view showing an example of the arrangement of the exhaust gas treatment device 7 in the engine compartment. The plane including the alternate long and short dash line shown in each of FIGS. 1 (A) and 1 (B) is taken from the −X side (rear side). Corresponds to the view. In the engine room, an engine 6, an exhaust gas treatment device 7, a cooling fan 12, a heat exchanger unit 13, and the like are arranged. A region surrounded by a broken line indicates a pump chamber PR in which a rear wheel traveling pump, a conveyor / screw pump, a charge pump, and the like are arranged.

  The engine 6 is supported on an upper part of an engine mounting seat 31a disposed on the frame 31 via an engine mount 31b. The engine mount 31 b is a vibration-proof mount, and prevents vibration generated by the engine 6 from being transmitted to the frame 31.

  The frame 31 is a member constituting the skeleton of the asphalt finisher 100. In the present embodiment, the frame 31 supports the hopper 2, the screed 3, the conveyor 10, the screw 11, and the like.

  A cooling fan 12 is disposed on the −Y side of the engine 6. Further, a heat exchanger unit 13 is disposed on the −Y side of the cooling fan 12.

  The cooling fan 12 is rotationally driven by the engine 6. When the cooling fan 12 is driven to rotate, outside air is taken as cooling air W into the engine compartment from a vent hole provided in the exterior cover 1b. The heat exchanger unit 13 performs heat exchange processing (cooling processing) with the cooling air W taken into the engine compartment. The heat exchanger unit 13 is arranged on the upstream side of the cooling fan 12 with respect to the flow direction of the cooling air W in the engine room.

  The heat exchanger unit 13 integrally includes heat exchangers such as a radiator, a fuel cooler, an oil cooler, and an intercooler 65.

  The radiator cools the cooling water flowing through the engine 6. The fuel cooler cools excess fuel that returns to the fuel tank 8. The oil cooler cools hydraulic oil circulating in hydraulic equipment such as a hydraulic cylinder. The intercooler 65 cools the compressed air supplied to the engine 6. Various refrigerants such as cooling water and hydraulic oil in each of these heat exchangers are cooled by cooling air W.

  A hydraulic pump 14 is attached to the + Y side of the engine 6. The hydraulic pump 14 is a hydraulic source of hydraulic equipment such as a hydraulic cylinder. The hydraulic pump 14 is driven by the engine 6.

  The exhaust gas discharged from the engine 6 is purified by the exhaust gas processing device 7. The exhaust gas discharged from the engine 6 contains substances such as nitrogen oxides. In order to remove these substances, an exhaust gas treatment device 7 is connected to the engine 6 via an exhaust pipe 6c as a connection pipe.

  The exhaust gas processing device 7 includes a diesel particulate filter as the first processing unit 7a and a selective reduction catalyst as the second processing unit 7b. The first processing unit 7 a and the second processing unit 7 b are connected by a connection unit 63. The exhaust gas that has passed through the second processing section 7b is released into the atmosphere via the outlet pipe 64.

  In the present embodiment, both the first processing unit 7a and the second processing unit 7b have a cylindrical shape extending in the X-axis direction. The first processing unit 7a has a two-stage structure in which the second processing unit 7b is arranged in the + Z direction (upward).

  The diesel particulate filter may include a pre-stage oxidation catalyst on the upstream side thereof. The selective reduction catalyst may include a downstream oxidation catalyst on the downstream side thereof. The diesel particulate filter may be an oxidation catalyst-carrying filter such as a catalyst soot filter (CSF).

  The exhaust gas treatment device 7 is supported by the support frame body 36 so as to be disposed away from the engine 6 at a position higher than the hydraulic pump 14. The support frame body 36 is a member constituting the skeleton of the asphalt finisher 100 and is fixed on the frame 31. With this configuration, the weight of the exhaust gas treatment device 7 is not applied to the engine 6, and no bracket is installed between the engine 6 and the exhaust gas treatment device 7. Therefore, a large burden is not imposed on such a bracket, and a large burden is not imposed on the body of the engine 6.

  A fixed base 38 is formed at the position where the heat exchanger unit 13 is disposed in the frame 31. The fixed base 38 is formed so as to protrude from the frame 31. The heat exchanger unit 13 is fixed on the fixed base 38.

  In a state where the engine 6, the exhaust gas processing device 7 and the heat exchanger unit 13 are fixed in the engine room, the engine 6, the exhaust gas processing device 7 and the heat exchanger unit 13 are covered with the engine hood 1a.

  Next, a configuration example of the exhaust pipe 6c will be described with reference to FIG. 4 is a view showing a part of the exhaust pipe 6c in the broken-line circle C1 of FIG. 3, FIG. 4 (A) shows a view seen from the + X side (front side), and FIG. 4 (B) shows FIG. (A) The figure which looked at the plane containing the dashed-dotted line from the -Y side (left side) is shown.

  As shown in FIG. 4A, the exhaust pipe 6c includes a flexible part 6c1, a straight pipe part 6c2, and a curved pipe part 6c3.

  The flexible portion 6c1 is a portion that can be bent according to an external force or the like. In the present embodiment, the flexible portion 6c1 is formed of a bellows tube having an expandable / contractible bellows structure. The flexible portion 6c1 may be configured by a flexible tube, a corrugated tube, or the like. With this configuration, the exhaust pipe 6c stably and continuously connects the exhaust port of the engine 6 and the exhaust gas processing device 7 even when the frequency of the engine 6 and the frequency of the exhaust gas processing device 7 are different. Can be connected. Moreover, it can suppress or prevent that one vibration is transmitted to the other, and can improve durability of each of the engine 6 and the exhaust gas treatment device 7.

  The straight pipe portion 6c2 is a portion extending linearly without being bent according to an external force or the like. In the present embodiment, the flexible portion 6c1 and the straight pipe portion 6c2 are integrally formed. However, the flexible part 6c1 and the straight pipe part 6c2 may be separate members that can be connected. The straight pipe portion 6c2 has a flange portion 6c2f at its end, and is configured to be connectable to other members.

  The curved tube portion 6c3 is a portion that curves and extends without being bent according to an external force or the like. In the present embodiment, the bending tube portion 6c3 has a flange portion 6c3f at the end thereof, and is configured to be connectable to other members.

  In the present embodiment, the flange portion 6c2f of the straight tube portion 6c2 is overlapped with the flange portion 6c3f of the curved tube portion 6c3 and fastened using bolts and nuts. Further, the exhaust pipe 6 c is supported by a U bolt 20 as a support member attached to the support frame body 36 instead of being fixed to the support frame body 36. For example, as shown in FIGS. 4 (A) and 4 (B), the exhaust pipe 6c is arranged so that the straight pipe portion 6c2 passes inside the U bolt 20 and can swing in the X-axis direction. Supported by a U-bolt 20. The exhaust pipe 6c may be supported by another support member such as an L-shaped hook. In this case, the exhaust pipe 6c may be swingable in the Z-axis direction.

  Next, another example of the arrangement of the exhaust gas treatment device 7 in the engine compartment will be described with reference to FIG. FIG. 5 is a diagram showing another example of the arrangement of the exhaust gas treatment device 7 in the engine compartment, and corresponds to FIG.

  The configuration of FIG. 5 is that the longitudinal axis of the exhaust gas treatment device 7 is arranged along the Y-axis direction (vehicle width direction), and the longitudinal axis of the exhaust gas treatment device 7 is the X-axis direction (vehicle longitudinal direction). 3 is different from the configuration of FIG.

  With this configuration, the cooling air W hits the respective circular end surfaces of the first processing unit 7a and the second processing unit 7b, and then the respective cylinders of the first processing unit 7a and the second processing unit 7b extending in the Y-axis direction. It flows along the surface and cools each of the first processing unit 7a and the second processing unit 7b.

  Next, still another example of the arrangement of the exhaust gas treatment device 7 in the engine compartment will be described with reference to FIG. FIG. 5 is a view showing still another example of arrangement of the exhaust gas treatment device 7 in the engine compartment, and corresponds to FIGS. 3 and 5.

  The configuration of FIG. 6 is different from the configuration of FIG. 5 in which the first processing unit 7a and the second processing unit 7b are arranged in a straight line at the same height.

  With this configuration, the cooling air W hits the circular end surface of the first processing unit 7a and then flows along the respective cylindrical surfaces of the first processing unit 7a and the second processing unit 7b extending in the Y-axis direction. Each of the processing unit 7a and the second processing unit 7b is cooled in order.

  Next, another arrangement example of the urea water tank 9 will be described with reference to FIGS. FIGS. 7A, 8A, and 9A are left side views of the asphalt finisher 100 and correspond to FIG. 1A. FIGS. 7B, 8B, and 9B are all top views of the asphalt finisher 100 and correspond to FIG. 1B. 7 to 9, illustration of the vent holes of the engine hood 1a and the exterior cover 1b is omitted for the sake of clarity. Also, illustration of hidden lines of the conveyor 10 and the screw 11 is omitted.

  The asphalt finisher 100 in FIG. 7 is a diagram in which the urea water tank 9 is disposed between the rear wheel 5 and the fuel tank 8 in that the urea water tank 9 is disposed in the −Z side (lower side) space of the hopper 2. 1 asphalt finisher 100.

  The asphalt finisher 100 in FIG. 8 is different from the asphalt finisher 100 in FIG. 1 in that a thin urea water tank 9 is disposed between the hopper 2 and the fuel tank 8.

  The asphalt finisher 100 of FIG. 9 is different from the asphalt finisher 100 of FIG. 1 in that the urea water tank 9 is disposed between the exterior cover 1b and the heat exchanger unit 13. 1, FIG. 7, and FIG. 8, the illustration of the heat exchanger unit 13 is omitted for the sake of clarity. However, the heat exchanger unit 13 (not shown) in each of FIGS. 1, 7, and 8 is disposed adjacent to the −Y side (left side) of the engine 6 as in the case of FIG. 9.

  The urea water tank 9 shown in each of FIG. 1 and FIGS. 7 to 9 is arranged so as not to become too hot during operation of the asphalt finisher 100. This is to prevent the deterioration of the urea water in the urea water tank 9.

  Further, each of the urea water tanks 9 shown in FIGS. 1 and 7 to 9 is arranged near the fuel tank 8. Specifically, the asphalt finisher 100 is disposed adjacent to the side surface on the −Y side (left side). This is because the fuel supply port of the urea water tank 9 is installed near the fuel supply port of the fuel tank 8.

  Next, the arrangement of the fuel tank 8 and the urea water tank 9 in the asphalt finisher 100A will be described with reference to FIG. FIG. 10A is a left side view of the asphalt finisher 100A and corresponds to FIG. FIG. 10B is a top view of the asphalt finisher 100A and corresponds to FIG.

  The asphalt finisher 100A of FIG. 10 is different from the asphalt finisher 100 of FIG. 1 in that crawlers 5A are provided instead of the front wheels 4 and the rear wheels 5.

  Further, the asphalt finisher 100A of FIG. 10 has the fuel tank 8 and the urea water tank 9 disposed at a position higher than the crawler 5A and lower than the engine 6, so that the fuel tank is approximately the same height as the rear wheel 5. 8 and the asphalt finisher 100 of FIG.

  In the asphalt finisher 100 </ b> A of FIG. 10, the urea water tank 9 is disposed adjacent to the −X side (rear side) of the fuel tank 8. However, the urea water tank 9 may be arranged on the −Z side (lower side) of the hopper 2 as shown in FIG. 7, and is arranged between the hopper 2 and the fuel tank 8 as shown in FIG. 8. Alternatively, as shown in FIG. 9, it may be disposed between the exterior cover 1 b and the heat exchanger unit 13.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  DESCRIPTION OF SYMBOLS 1 ... Tractor 1a ... Engine hood 1b ... Exterior cover 2 ... Hopper 2a ... Hopper cylinder 3 ... Screed 3a ... Leveling arm 4 ... Front wheel 5 ... Rear wheel 5A ... Crawler 6 ... Engine 6a ... Air filter 6b ... Intake pipe 6c ... Exhaust pipe 6c1 ... Flexible part 6c2 ... Straight pipe part 6c2f ... Flange part 6c3・ ・ Bent tube 6c3f ・ ・ ・ Flange 7 ・ ・ ・ Exhaust gas treatment device 7a ・ ・ ・ First treatment 7b ・ ・ ・ Second treatment 8 ・ ・ ・ Fuel tank 9 ・ ・ ・ Urea water tank 10 ・.... Conveyor 11 ... Screw 12 ... Cooling fan 13 ... Heat exchanger unit 14 ... Hydraulic pump 20 ... U bolt 31 ... Frame 31a ... Engine installation 31b ... Engine mount 36 ... Support frame body 38 ... Fixed base 60 ... Engine control module 61 ... Turbocharger 63 ... Connection part 64 ... Outlet pipe 65 ... Intercooler 68 ... urea water injection device 69 ... urea water hose 70 ... urea water supply pump 71 ... filter 72 ... first NOx sensor 73 ... second NOx sensor 74 ... remaining amount of urea water Sensor 75 ... Exhaust gas controller 76 ... Main controller 77 ... Monitor 80 ... Cooling water hose 81 ... First part 82 ... Second part 83 ... Third part 84 ... 4th part 85 ... 5th part 86 ... 6th part 100, 100A ... Asphalt finisher 150 ... Exhaust gas treatment System SM ... Supply module

Claims (5)

A tractor,
A hopper installed on the front side of the tractor;
A conveyor for conveying the paving material in the hopper to the rear side of the tractor;
A screw that spreads the paving material conveyed by the conveyor and spread on the road surface in the vehicle width direction; and
A screed that spreads the paving material spread by the screw on the rear side of the screw,
A driver's seat provided at the top of the tractor;
An engine mounted in an engine compartment formed in the tractor in front of the driver seat ;
A cooling fan disposed in the engine compartment and disposed adjacent to the engine in the vehicle width direction;
An exhaust gas treatment device disposed in the engine chamber and purifying exhaust gas of the engine,
The cooling fan and the exhaust gas treatment device are arranged side by side in the vehicle width direction with respect to the traveling direction, and
The exhaust gas treatment device is disposed on the downstream side of the cooling fan so as to receive wind from the cooling fan.
Asphalt finisher. The exhaust gas treatment device has a two-stage structure.
The asphalt finisher according to claim 1. The exhaust gas treatment device is disposed along the vehicle width direction.
The asphalt finisher according to claim 1 or 2. The exhaust gas treatment device is disposed along the longitudinal direction of the vehicle.
The asphalt finisher according to claim 1 or 2. The exhaust gas treatment device is exposed to the outside;
The asphalt finisher according to any one of claims 1 to 3.

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