JP2016050499A - Combine-harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine-harvester capable of stopping supply of non-required urea water solution and reducing an amount of usage of urea water solution.SOLUTION: This invention relates to a combine-harvester comprising: a mower; a thresher; a travel machine having the mower and the thresher installed therein; and an engine internally installed in an engine room on the travel machine and at the same time there are provided the first exhaust gas purification case for removing particulate substance in the exhaust gas of the engine and the second exhaust gas purification case for removing nitrogen oxide substance in the exhaust gas of the engine, there is provided a structure for supplying urea water solution by a urea water pump from a urea water tank to a urea mixing pipe, a urea water solution supplying operation of the urea water pump can be carried out when a key-switch for the engine is turned on, an engine warming-up operation is completed and a temperature of urea water solution in the urea water tank is higher than a prescribed temperature.SELECTED DRAWING: Figure 12

Description

  The present invention relates to a combine that harvests cereal grains planted in a field and collects grains, and more specifically, particulate matter (soot, particulates) contained in exhaust gas of a diesel engine or the like, or The present invention relates to a combine equipped with an exhaust gas purification device that removes nitrogen oxides (NOx) and the like contained in exhaust gas.

  Conventionally, a diesel particulate filter (hereinafter referred to as a first exhaust gas purification case) as an exhaust gas purification device (exhaust gas aftertreatment device) in the exhaust path of a diesel engine, and a urea selective reduction type A case with a catalyst (hereinafter referred to as a second exhaust gas purification case) is provided, exhaust gas is introduced into the first exhaust gas purification case and the second exhaust gas purification case, and exhaust gas discharged from the diesel engine is removed. Techniques for purification treatment are known (see, for example, Patent Documents 1 to 3). Moreover, in the combine, it is a structure that cuts uncut cereals in the field with a cutting blade device, conveys the harvested cereals to a threshing device by a cereal conveying device, threshs, and collects the grains in a cereal tank. The engine is mounted on the traveling machine body, and the first exhaust gas purification case is disposed in the lateral posture on the upper surface side of the engine, and the exhaust gas is discharged from the engine toward the first exhaust gas purification case. (For example, refer to Patent Document 4).

JP 2009-74420 A JP 2012-21505 A JP 2012-177233 A JP 2010-209813 A

  When the first exhaust gas purification case and the second exhaust gas purification case are assembled apart from the engine as in Patent Document 1 or 2, the engine is changed to the first exhaust gas purification case or the second exhaust gas purification case. Since the temperature of the exhaust gas to be supplied is lowered and the chemical reaction such as the regeneration of the diesel particulate filter or the selective catalyst reduction action tends to be incomplete, the temperature of the exhaust gas in the second exhaust gas purification case is increased. There is a problem that a special device is required to be maintained.

On the other hand, when the first exhaust gas purification case and the second exhaust gas purification case are assembled to the engine as in Patent Document 3 or Patent Document 4, the temperature drop of the exhaust gas supplied from the engine to the second exhaust gas purification case Although it is easy to maintain the temperature of the exhaust gas in the second exhaust gas purification case at a high temperature, it is necessary to secure an installation space for the first exhaust gas purification case and the second exhaust gas purification case in the engine room And cannot easily support the first exhaust gas purification case, the second exhaust gas purification case or the like, and, for example, urea supplied into the exhaust gas discharged into the second exhaust gas purification case in a cold region or the like There is a problem that the aqueous solution freezes inside the urea water tank, the urea water pump, or the piping connecting them.
There are also problems such as.

  Therefore, the present invention seeks to provide a combine that has been improved by examining these current conditions.

  In order to achieve the object, a combine according to a first aspect of the present invention includes a harvesting device, a threshing device, a traveling machine body in which the harvesting device and the threshing device are installed, and an engine room on the traveling machine body. In a combine comprising an engine and a first exhaust gas purification case for removing particulate matter in the exhaust gas of the engine and a second exhaust gas purification case for removing nitrogen oxides in the engine exhaust gas, The first exhaust gas purification case is connected to an exhaust outlet of the engine, the second exhaust gas purification case is connected to the first exhaust gas purification case via a urea mixing pipe, and urea water is connected to the urea mixing pipe. A structure in which a urea aqueous solution is supplied from a tank by a urea water pump, and the warm-up operation is completed after the key switch of the engine is turned on and operated. , When the urea aqueous solution temperature of the aqueous urea tank is above a predetermined, aqueous urea solution feed operation of the urea water pump is that configured to be actuated.

  According to a second aspect of the present invention, in the combine according to the first aspect, the remaining amount of fuel in the fuel tank supplied to the engine is shown on the left and right sides of the speedometer for displaying the vehicle speed of the driving unit. A fuel gauge to be displayed and a urea water remaining amount monitor to display the remaining amount of the urea aqueous solution in the urea water tank are arranged separately.

  According to a third aspect of the present invention, in the combine according to the first aspect, when the freeze prevention operation tool operated by an operator is subjected to the freeze prevention operation, the urea solution between the urea water tank and the urea water pump is used. The anti-freezing control for preventing the urea aqueous solution stored in the urea water pump or the piping from being frozen by the circulation of the urea aqueous solution in the urea water tank is started.

  According to the first aspect of the present invention, a reaping device, a threshing device, a traveling machine body on which the reaping device and the threshing device are installed, and an engine installed in an engine room on the traveling machine body, In a combine comprising a first exhaust gas purification case for removing particulate matter in engine exhaust gas and a second exhaust gas purification case for removing nitrogen oxide substance in engine exhaust gas, an exhaust outlet of the engine is provided. The first exhaust gas purification case is connected, the second exhaust gas purification case is connected to the first exhaust gas purification case via a urea mixing pipe, and urea aqueous solution is supplied from the urea water tank to the urea mixing pipe. A structure in which water is supplied by a water pump, in which the key switch of the engine is turned on and operated so that the warm-up operation is completed and the urea in the urea water tank is Since the urea aqueous solution supply operation of the urea water pump is operable when the solution temperature is equal to or higher than a predetermined temperature, an unnecessary urea aqueous solution is supplied during a warm-up operation with a small amount of NOx generated in the engine. It can be stopped and the amount of urea aqueous solution used can be reduced.

  According to the second aspect of the present invention, a fuel gauge that displays the remaining amount of fuel in the fuel tank supplied to the engine on the left and right sides across the speedometer for displaying the vehicle speed of the driving unit; Since the urea water remaining amount monitor that displays the remaining amount of urea aqueous solution in the urea water tank is allocated and arranged, the operator can check the fuel display and the urea water amount display while monitoring the speed display. The fuel display unit and the urea water amount display unit are separated from each other to the left and right of the speed display unit, so that misrecognition of the fuel remaining amount display and the urea aqueous solution remaining amount display can be easily prevented.

  According to invention of Claim 3, when the antifreezing operation tool operated by an operator is operated for antifreezing, the urea aqueous solution in the urea water tank between the urea water tank and the urea water pump The anti-freezing control for preventing the urea aqueous solution stored in the urea water pump or the piping from being frozen in the circulation of the urea is started, so the urea water pump or the piping, etc. The urea aqueous solution stored in the tank can be prevented from freezing, and the urea water tank, the urea water pump or the heating device installed in the piping can be omitted, and the urea aqueous solution is sufficiently stored in the urea water tank. In this state, the urea aqueous solution supplied to the urea mixing pipe by the urea water pump can be prevented from being insufficient.

It is a left view of the combine for 4 thread cutting of this invention. It is a right view of the combine. It is a top view of the combine. It is the perspective view of the driving | running part seen from the left side rear, and a Glen tank front part. It is a left view of an operation part and a Glen tank. It is a left view of an operation part and an engine. It is a left view of an engine room. It is a front view of an engine room. It is a rear view of an engine room. It is a urea water supply path | route figure of a urea mixing pipe. It is a control circuit diagram of a combine. It is a flowchart of urea water supply control of a urea mixing pipe. It is explanatory drawing of the urea water amount display screen of the indicator of a driving | operation part. It is explanatory drawing of the urea water control display screen of the indicator of a driving | operation part.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying a combine according to the present invention will be described with reference to the drawings. In the following description, the left side in the forward direction of the traveling machine body 1 is simply referred to as the left side, and the right side in the forward direction is also simply referred to as the right side. The combine of this embodiment is demonstrated with reference to FIG. 1 thru | or FIG. As shown in FIGS. 1 to 4, a traveling machine body 1 supported by a pair of left and right traveling crawlers 2 (traveling portions) is provided. At the front part of the traveling machine body 1, a four-row mowing device 3 for mowing cereals is mounted by a single-acting hoisting hydraulic cylinder 4 so as to be adjustable up and down around the mowing pivot fulcrum shaft 4a. . A threshing device 5 having a feed chain 6 and a grain tank 7 for storing grain after threshing are mounted on the traveling machine body 1 side by side. In addition, the threshing apparatus 5 is arrange | positioned at the left side toward the advancing direction of the traveling body 1, and the Glen tank 7 is arrange | positioned at the right side toward the advancing direction of the traveling body 1 (refer FIG. 3).

  A discharge auger 8 for discharging the grains in the grain tank 7 from the rear to the top of the grain tank 7 is provided. Centering on the vertical auger 8a of the discharge auger 8, the front part of the glen tank 8 can be rotated to the side of the machine body. A driving unit 10 is provided in front of the Glen tank 7 and on the right front of the traveling machine body 1. The driving unit 10 includes a step 10a on which an operator gets on, a driver's seat 10b, a handle column 11 provided with a steering handle 10c, a main speed change lever 12, a sub speed change lever 13, a work clutch lever 14, or switches. The side column 15 is arranged.

  As shown in FIGS. 1 and 2, a diesel engine 20 as a power source of each drive unit is disposed in the traveling machine body 1 below the driver seat 10b. Further, left and right track frames 21 are disposed on the lower surface side of the traveling machine body 1. The track frame 21 includes a drive sprocket 22 that transmits the power of the engine 20 to the traveling crawler 2, a tension roller 23 that maintains the tension of the traveling crawler 2, and a plurality of track rollers that hold the ground side of the traveling crawler 2 in a grounded state. 24. The driving sprocket 22 supports the front side of the traveling crawler 2, the tension roller 23 supports the rear side of the traveling crawler 2, and the track roller 24 supports the grounding side of the traveling crawler 2.

  As shown in FIG. 1 to FIG. 3, the reaping device 3 includes a four-row culm pulling device 31 that causes uncut cereals in the field and a clipper-type cutting device that cuts the stock of uncut cereals in the field. A cutting blade device 32 and a culm transporting device 33 for transporting the chopped culm from the culm pulling device 31 to the front end (feed start end side) of the feed chain 6 are provided. An uncut grain culm in the field is pulled up by the grain culling pulling device 31, a stock source of the uncut grain culm is cut by the cutting blade device 32, and the harvested corn straw is conveyed to the front end of the feed chain 6 by the grain culling pulling device 31 Is done.

  The threshing device 5 includes a handling cylinder 51 for threshing threshing, an oscillating sorting board 52 as an oscillating sorting mechanism for sorting threshing material falling below the handling cylinder 51, and a sorting wind on the oscillating sorting board 52. , A processing fan 54 for reprocessing threshing waste taken out from the rear part of the handling cylinder 51, and a dust exhausting fan 61 for discharging dust at the rear part of the swing sorter 52 to the outside of the machine. It has.

  As shown in FIGS. 1 and 2, an exhaust chain 62 is disposed on the rear end side (feed end side) of the feed chain 6. The waste passed through the feed chain 6 from the rear end side of the feed chain 6 (the grain from which the grain has been threshed) is discharged to the rear of the traveling machine body 1 in a long state, or the rear side of the threshing device 5 After being cut to a suitable length by the waste cutter 63 provided at the front, the paper is discharged to the lower rear of the traveling machine body 1.

  Below the rocking sorter 52 are a first conveyor 55 for picking up the grains (the first sort) selected by the rocking sorter 52, and grains, swarf, and grains with branches. A second conveyor 56 is provided to take out the mixed second selection. In addition, from the front side of the traveling direction of the traveling machine body 1, the first conveyor 55 and the second conveyor 56 are arranged on the upper surface side of the traveling machine body 1 above the rear part of the traveling crawler 2 in a side view.

  The swing sorting board 52 is configured to swing-sort (specific gravity sort) the cereal grains that have fallen below the handling cylinder 51. Grains that fall from the oscillating sorter 52 (the first sort) are removed from the grain by the sorter wind from the tang fan 53 and fall first onto the conveyor 55. A first cereal cylinder 57 extending in the vertical direction is connected to a terminal portion of the first conveyor 55 that protrudes outward from one side wall (right side wall in the embodiment) of the threshing device 5 near the grain tank 7. Yes. The grain taken out from the first conveyor 55 is carried into the Glen tank 7 by a first cereal conveyor (not shown) provided in the first cereal cylinder 57 and collected in the Glen tank 7.

  Oscillating sorter 52 performs second sorting such as grain with branches and branches (reduction-reprocessed product for re-sorting mixed grain and swarf) by swing sorting (specific gravity sorting). 56 is configured to be dropped. The second sorting product taken out by the second conveyor 56 is returned to the upper surface side of the swing sorting board 52 through the second reduction cylinder 58 and the second processing unit 59 and is re-sorted. Further, the dust and dust in the crushed material from the handling drum 51 are discharged from the rear portion of the traveling machine body 1 toward the field by the sorting air from the tang fan 53 and the dust suction and discharge action of the dust fan 61. .

  Next, the mounting structure of the diesel engine 20 will be described with reference to FIGS. As shown in FIGS. 6 to 9, the diesel engine 20 is supported in an anti-vibration manner via the engine bed 41 on the upper surface below the driver's seat 10 b in the upper surface of the traveling machine body 1 of the driving unit 10. The driving force of the diesel engine 20 is transmitted to the belt to the traveling drive mission case 42 in the front part of the track frame 21 or to each part. The engine room cover 44 that forms the front side or the upper side of the engine room 43 covers the front side and the upper side of the diesel engine 20. In addition, the partition plate body 16 is stretched below the side column 15, and the upper surface side of the engine room 43 is formed by the partition plate body 16, and the upper surface side of the diesel engine 20 is covered by the partition plate body 16.

  Further, as shown in FIGS. 6 to 8, a box-shaped wind tunnel case 46 is erected on the right end portion of the traveling machine body 1 of the operating unit 10 via an opening / closing fulcrum shaft 45, and an engine room cover is provided on the inner surface of the wind tunnel case 46. The right end of 44 is connected. A water-cooling radiator 47 is erected on the upper surface side of the traveling machine body 1 inside the wind tunnel case 46, and the radiator 47 is disposed to face the cooling fan 48 of the diesel engine 20. The outside air (cooling wind) is taken into the wind tunnel case 46 from the outside opening 46 a at the upper part of the wind tunnel case 46, and the cooling fan is introduced from the inside opening 46 b at the lower part of the wind tunnel case 46 into the engine room 43 through the radiator 47. The dust-removed corner cooling air is moved by 48 forces, and the diesel engine 20 and the like are cooled by the dust-removing corner cooling air. Note that a dust removal net is stretched in the machine-side opening 46a to prevent intrusion of dust and the like into the wind tunnel case 46.

  Further, as shown in FIGS. 6, 7, and 9, left and right engine room columns 71 are erected on the upper surface of the traveling machine body 1 on the rear side of the driving unit 10, and a back plate 72 is stretched between the left and right engine room columns 71. Make it. That is, the engine room 43 is formed by the partition plate body 16, the engine room cover 44, the wind tunnel case 46, and the back plate body 72, and the output shaft 20a (crankshaft) of the diesel engine 20 is directed left and right to A diesel engine 20 is installed in the room 43. A left end portion of the output shaft 20a protrudes from the left side of the diesel engine 20, and a travel drive belt 73 and a threshing drive belt 74 are connected to the left end portion of the output shaft 20a, so that the travel crawler 2 and the threshing device 5 are connected. The driving force of the diesel engine 20 is output.

  On the other hand, as shown in FIGS. 4 to 9, an air cleaner 49 that supplies fresh air to the diesel engine 20 and a first exhaust gas purification case 50 that removes particulate matter (PM) in the exhaust gas of the diesel engine 20 are provided. . The upper surface side of the engine room cover 44 is formed in a stepped manner, and the front upper surface 44a is formed lower and the rear upper surface 44b is formed higher on the upper surface side of the engine room cover 44. An auxiliary cover body 44c is provided between the rear end of the rear upper surface 44b of the engine room cover 44 and the upper ends of the left and right engine room columns 71. An air cleaner 49 is fixed to the lower surface of the auxiliary cover body 44c, and the rear upper surface 44b of the engine room cover 44 and The air cleaner 49 is disposed on the lower surface side of the auxiliary cover body 44c, and the sound deadening box body 40 is mounted on the upper surface side of the auxiliary cover body 44c, and the inside of the sound deadening box body 40 is placed in the wind tunnel case 46 via the fresh air intake pipe body 39. The air cleaner 49 is communicated with the inside of the sound deadening box 40. The air in the wind tunnel case 46 is taken into the intake manifold 19 of the diesel engine 20 via the air cleaner 49 and the fresh air intake pipe 49a. An electrical equipment box 38 is provided on the upper surface side of the sound deadening box 40, and an engine controller 121 and the like to be described later are provided inside.

  On the other hand, the driver's seat 10b is supported on the upper side of the front upper surface 44a of the engine room cover 44 via the seat support mechanism 10d, and the first upper surface 44a of the engine room cover 44 and the lower surface side of the partition plate body 16 are first. An exhaust gas purification case 50 is disposed. The outer shape of the first exhaust gas purification case 50 is formed in a long cylindrical shape and is supported on the upper surface side of the diesel engine 20. In other words, the direction of the center axis of the output shaft 20a of the diesel engine 20 and the direction of movement of the exhaust gas inside the first exhaust gas purification case 50 are matched. A long cylindrical first exhaust gas purification case 50 is supported in parallel with the output shaft 20 a of the diesel engine 20.

  That is, as shown in FIGS. 7 and 8, the exhaust gas intake side of the first exhaust gas purification case 50 in which the exhaust inlet pipe 81 is disposed is positioned below the front upper surface 44a of the engine room cover 44 and the partition. Below the plate 16, the exhaust gas extraction side of the first exhaust gas purification case 50 in which the exhaust outlet pipe 82 is disposed is located. While connecting the exhaust inlet pipe 81 to the exhaust manifold 83 of the diesel engine 20, the exhaust connecting pipe 84 extends between the threshing device 5 and the glen tank 7 on the rear side of the engine room 43 (upper side of the traveling machine body 1). The front end side of the exhaust connection pipe 84 is communicated with the exhaust outlet pipe 82 that is provided and opened rearward. Exhaust gas discharged from the exhaust manifold 83 of the diesel engine 20 is discharged from the first exhaust gas purification case 50 to the exhaust connection pipe 84.

  On the other hand, as shown in FIGS. 4, 5, and 9, the urea mixing pipe 77 that discharges the exhaust gas in the first exhaust gas purification case 50 from the exhaust connection pipe 84, and the nitrogen oxides in the exhaust gas of the diesel engine 20 A second exhaust gas purification case 78 is provided as a urea selective catalytic reduction (SCR) system that removes water. The pipe-shaped exhaust connecting pipe 84 that is long in the front-rear direction, the pipe-like urea mixing pipe 77 that is long in the vertical direction, and the second exhaust gas purification case 78 that is long in the front-rear direction (horizontal posture) are cranked in side view. Connect to shape. The front support bracket 85 is welded and fixed to the exhaust connection pipe 84, and the front support bracket 85 is bolted to the pipe base 86 on the left side surface of the left engine room column 71 so that the mounting position can be adjusted. The exhaust connection pipe 84 is supported on the pipe base 86 via the front support bracket 85 so that the position of the exhaust connection pipe 84 can be adjusted in the left-right direction. Further, the rear support bracket 87 is welded and fixed to the second exhaust gas purification case 78, and the rear support bracket 87 is bolted to the upper surface side of the traveling machine body 1, so that the second exhaust gas purification case is set to the horizontal frame height of the traveling machine body 1. 78 is supported.

  That is, particulate matter (PM) in the exhaust gas of the diesel engine 20 is removed by the diesel oxidation catalyst and the soot filter in the first exhaust gas purification case 50, while the first exhaust gas purification is performed through the urea mixing pipe 77. A second exhaust gas purification case 78 is connected to the case 50, and exhaust gas from the first exhaust gas purification case 50 is introduced into the second exhaust gas purification case 78. Urea water is mixed as ammonia by hydrolysis into the exhaust gas supplied into the urea mixing pipe 77 and extending from the first exhaust gas purification case 50 to the second exhaust gas purification case 78, and the second exhaust gas purification case 78. The nitrogen selective substances (NOx) in the exhaust gas of the diesel engine 20 are reduced by the SCR catalyst and the oxidation catalyst for reducing the urea selective catalyst in the engine. It is.

  As shown in FIG. 5 and the like, the exhaust connection pipe 84 is supported at a height substantially equal to the height of the first exhaust gas purification case 50 on the upper surface side of the diesel engine 20, and the threshing device 5 or the glen tank 7 is placed thereon. The second exhaust gas purification case 78 is supported to be substantially the same height as the frame height of the traveling machine body 1 and the pulley cover plate body 88 is attached to the urea mixing pipe 77 (the vertically extending portion in the middle of the crank type exhaust path). Are disposed in close proximity to each other, and a urea mixing pipe 77 and a second exhaust gas purification case 78 are installed outside the tang pulley pulley 89 for inputting the driving force of the diesel engine 20 to the threshing device 5. The outside air heated by the exhaust heat of the urea mixing pipe 77 or the second exhaust gas purification case 78 is sucked into the hot fan 53 as the selected air.

  Further, as shown in FIG. 5, one end side of the tail pipe 88 is connected to the exhaust outlet of the rear end surface of the second exhaust gas purification case 78, and the pipe cover 89 is fixed to the first cereal cylinder 57, so that A pipe cover 89 is provided along the back surface of the cylinder 57, and an exhaust outlet on the other end side of the tail pipe 88 is extended through the pipe cover 89 toward the upper end side of the first cereal cylinder 57. As the support member of the pipe 88, the first cereal cylinder 57 is also used, and the upper end side of the tail pipe 88 is opened rearward at a high position between the threshing device 5 and the Glen tank 7, and the second rearwardly extending from the upper end side of the tail pipe 88. The exhaust gas purification case 78 is configured to release the exhaust gas.

  Further, as shown in FIGS. 6 to 8, the partition plate body 16 and the engine room cover 44 are formed in a double structure, the left and right ends of the internal space 16a of the double structure partition plate body 16 are opened, and two The left and right ends of the internal space 44d of the heavy engine room cover 44 are opened. The vertical thickness dimension of the partition plate body 16 and the vertical width dimension of the internal space 44d of the engine room cover 44 are substantially equal, and the right end portion of the partition plate body 16 is formed on the left end portion of the internal space 44d of the engine room cover 44. Insert the mating. That is, the left end portion of the engine room cover 44 is fitted to the right end portion of the partition plate body 16, and the internal space 16a of the partition plate body 16 and the internal space 44d of the engine room cover 44 are communicated.

  Further, the right end portion of the internal space 44d of the engine room cover 44 is inserted into the wind tunnel case 46, and the internal space 44d of the engine room cover 44 is communicated with the interior of the wind tunnel case 46, so that the engine room cover 44 having a double structure is provided. Is connected to the outside air intake side of the radiator 47 adjacent to the diesel engine 20. The double-structure partition plate 16 and the engine room cover 44 cover the first exhaust gas purification case 50. The heat insulating action of the internal space 16a of the partition plate 16 and the internal space 44d of the engine room cover 44 are covered. Due to this heat insulation action, the heat on the engine room 43 side is suppressed from being transmitted to the driver seat 10 b on the upper surface side of the engine room cover 44 or the upper surface side of the side column 15.

  In addition, as shown in FIGS. 8 and 9, a lever fulcrum shaft mechanism 17 that supports the work clutch lever 14 and the like is disposed above the upper surface of the partition plate body 16 on the lower surface side of the horizontal surface portion of the side column 15. At the same time, the left end portion of the partition plate body 16 and the left end surface of the first exhaust gas purification case 50 are positioned in a vertical plane, and the left end portion of the partition plate body 16 and the left end surface of the first exhaust gas purification case 50 are aligned. On the left side, a clutch operation link mechanism 18 is arranged in which the threshing drive belt 74 is operated to be tensioned or relaxed in conjunction with the operation of the work clutch lever 14 or the like. A side column cover 15 a that covers the left side of the lever fulcrum shaft mechanism 17 or the clutch operation link mechanism 18 is provided, and the upper end of the side column cover 15 a is connected to the lower end of the left side surface of the side column 15. That is, the side column cover 15a is disposed to face the left opening of the internal space 16a of the partition plate body 16, and the clutch operation link is provided between the partition plate body 16 and the first exhaust gas purification case 50 and the side column cover 15a. A mechanism 18 is arranged.

  As shown in FIGS. 1 and 4 to 9, the reaping device 3, the threshing device 5, the traveling machine body 1 in which the reaping device 3 and the threshing apparatus 5 are installed, and the engine room 43 on the traveling machine body 1 are installed. In the combine including the diesel engine 20 and the first exhaust gas purification case 50 for processing the exhaust gas of the diesel engine 20, an engine room cover 44 that forms the engine room 43 is provided, and the driver's seat 10b is provided on the upper surface side of the engine room cover 44. The first exhaust gas purification case 50 is covered with a double-structure engine room cover 44. Therefore, the first first exhaust gas purification case 50 can be disposed immediately below the driver seat 10b disposed on the upper surface of the engine room 43, and the first exhaust gas purification case 50 is disposed between the lower surface of the driver seat 10b and the upper surface of the diesel engine 20. The first exhaust gas purification case 50 can be installed in a compact manner on the upper surface side of the diesel engine 20 while it can be supported and the installation width in the left-right direction of the driver seat 10b and the diesel engine 20 can be easily reduced. Further, the temperature rise outside the engine room cover 44 can be suppressed, and the hot air in the engine room 43 can be prevented from being transmitted to the operator sitting on the driver's seat 10b. A filter regeneration operation in which the exhaust gas temperature in the first exhaust gas purification case 50 is maintained at a high temperature can be executed smoothly.

  As shown in FIGS. 4 to 9, the first exhaust gas purification case 50 is installed in the engine room 43 below the driver seat 10 b, and the air cleaner 49 is installed in the engine room 43 behind the driver seat 10 b. The first exhaust gas purification case 50 is configured such that the front side or the upper side is covered with a double engine room cover 44. Therefore, the first exhaust gas purification case 50 that becomes high temperature and the air cleaner 49 that takes in outside air can be compactly disposed above the diesel engine 20 and adjacent to each other. For example, both the diesel engine 20 and the air cleaner 49 can be adjacent to the cooling air intake part of the diesel engine 20, and the outside air can be easily introduced into the air cleaner 49 from the cooling air intake part of the diesel engine 20.

  As shown in FIGS. 4 to 9, the radiator 47 is disposed adjacent to the diesel engine 20, and the internal space of the double-structure engine room cover 44 is communicated with the outside air intake side of the radiator 47. . Therefore, the internal space of the engine room cover 44 can be ventilated using the outside air suction input of the radiator 47 (cooling fan 48). There is no need to provide a special ventilation fan or the like for allowing air in and out of the internal space of the engine room cover 44 to be constructed at a low cost.

  As shown in FIGS. 1 to 5, the reaping device 3, the threshing device 5, the traveling machine body 1 in which the reaping device 3 and the threshing device 5 are installed, and the diesel engine 20 installed in the engine room 43 on the traveling machine body 1. And a combiner including a first exhaust gas purification case 50 for removing particulate matter in the exhaust gas of the diesel engine 20 and a second exhaust gas purification case 78 for removing nitrogen oxides in the exhaust gas of the diesel engine. The first exhaust gas purification case 50 is connected to the exhaust outlet of the diesel engine 20, and the second exhaust gas purification case 78 is connected in series to the first exhaust gas purification case 50 via the urea mixing pipe 77. The second exhaust purification case 78 is configured to be connected between the grain tank 7 and the threshing device 5 adjacent to the grain tank 7 while being connected. To have. Accordingly, the second exhaust gas purification case 78 can be compactly installed between the grain tank 7 and the threshing device 5 adjacent to the grain tank 7, and the second exhaust gas purification case 78 is fixed to the traveling machine body 1 or the like. The case support structure can be simplified.

  As shown in FIGS. 3 and 5, a second exhaust gas purification case 78 is disposed on the upper surface between the grain tank 7 and the threshing device 5 among the upper surface of the traveling machine body 1. Therefore, the second exhaust gas purification case 78 can be disposed in the longitudinal direction at the lower position between the grain tank 7 and the threshing device 5, and the second exhaust gas purification case 78 is not required to be expanded and the like. Can be installed compactly.

  As shown in FIG. 5, the first lifting cylinder 57 is erected on the outside portion of the threshing device 5, and the grain of the threshing device 5 is carried into the grain tank 7 by the first lifting cylinder 57. The tail pipe 88 is erected along the first cereal cylinder 57, and the lower end side of the tail pipe 88 is connected to the exhaust gas outlet of the second exhaust gas purification case 78. Therefore, the tailpipe 88 can be arranged with the first cereal cylinder 57 as a support member, and the support structure of the tailpipe 88 can be simplified, while the second exhaust along the bottom of the glen tank 7 and the threshing device 5. The gas purification case 78 can be extended. That is, the tailpipe 88 is juxtaposed on the first cereal cylinder 57, and the space between the grain tank 7 and the threshing device 5 is effectively used to assemble the second exhaust gas purification case 78 and the tailpipe 88. it can.

  As shown in FIGS. 5 and 7, the diesel engine 20 and the first exhaust gas purification case 50 are arranged in the internal space of the engine room cover 44 having a double structure, and the rear of the engine room 43 formed by the engine room cover 44. A urea mixing pipe 77 is erected on the side, and the exhaust gas inlet of the second exhaust gas purification case 78 is connected to the exhaust gas outlet of the urea mixing pipe 77. Therefore, by using the height dimensional difference between the upper surface height of the diesel engine 20 where the first exhaust gas purification case 50 is disposed and the upper surface height of the traveling machine body 1 where the second exhaust gas purification case 78 is disposed, A vertically long urea mixing tube 77 can be disposed in the vicinity of the back surface of the engine 20. That is, the second exhaust gas purification case 78 can be supported close to the rear surface of the diesel engine 20, and the exhaust outlet of the diesel engine 20 and the second exhaust gas purification case 78 can be connected by a short exhaust path. It can be easily reduced that the temperature of the exhaust gas discharged to the second exhaust gas purification case 78 is lowered.

  Next, a structure for supplying an aqueous urea solution to the inside of the urea mixing tube 77 will be described with reference to FIGS. As shown in FIGS. 5 and 10, a urea water tank 95 for storing a urea aqueous solution 94 is provided. Of the upper surface of the traveling machine body 1, the urea water tank 95 is supported on the upper surface behind the Glen tank 7 via the tank support 95a. Further, as shown in FIG. 10, the urea water supply unit 98 includes a urea water pump 96 that pumps the urea aqueous solution 94 in the urea water tank 95 and a urea water supply electric motor 97 that drives the urea water pump 96.

  Further, as shown in FIG. 10, a urea water injection valve 99 is provided in the urea injection portion 77 a of the urea mixing pipe 77, and the urea water injection valve 99 is connected to the urea water pump 96 through the urea water injection pipe 123. An urea water supply pipe 124 and a urea water return pipe 125 are connected between the urea water tank 95 and the urea water pump 96, and an engine controller 121 that executes fuel injection control of the diesel engine 20 and the like, and a urea water pump or urea A urea injection controller 122 for controlling the water injection valve is provided, and urea aqueous solution is sprayed from the urea water injection valve 99 into the urea mixing pipe 239 so that the urea water supplied into the urea mixing pipe 77 is the first exhaust gas. The exhaust gas from the purification case 50 to the second exhaust gas purification case 78 is mixed as ammonia. The urea injection controller 122 is connected to the urea water temperature sensor 126 of the urea water tank 95 and the urea water quantity meter 127 of the urea water tank 95, and the engine controller 121 and the urea injection controller 122 are connected to the operation state of the diesel engine 20. Depending on the above, urea water is supplied into the urea mixing pipe 77 at an appropriate time.

  Next, combine harvest control will be described with reference to FIG. As shown in FIG. 11, an engine controller 121 that controls the driving of the diesel engine 20, a display controller 351 that controls the display operation of the display liquid crystal monitor 162, a cutting controller 354 that controls the driving of the cutting device 3, and a feed chain 6, a controller 355 for controlling the driving of the traveling unit such as speed control of the cereal conveyance by 6, a controller 356 for controlling the driving of the traveling unit such as the stability control of the posture of the traveling machine 1, and the raising and lowering of the discharge auger 8. Controller 357 for controlling the driving of the threshing device 5 including control and opening / closing control of the chaff sheave of the swing sorter 52 and the controller 358 after threshing for controlling the driving of the threshing device 5 including the turning control of the discharge auger 8 and the like. And.

  The display liquid crystal monitor 162 is arranged on the upper surface of the front portion of the side column 15. In addition, the display controller 351, the cutting controller 354, the pre-travel controller 355, the post-travel controller 356, the pre-threshing controller 357, and the post-threshing controller 358 can communicate with each other via the CAN communication bus 349. It is connected. The engine controller 121 and the pre-threshing controller 357 that are separate from each other are connected to each other via a CAN communication bus 350 so that they can communicate with each other.

  As shown in FIG. 11, the engine controller 121 is connected to a battery (not shown) via a key switch 331 for applying power. A cooling water thermometer 319 for detecting the cooling water temperature of the engine 20 is connected to the input side of the engine controller 121. The display changeover switch 164 of the liquid crystal monitor 162 is connected to the input side of the display controller 351, while the liquid crystal monitor 162 is connected to the output side of the display controller 351. A work clutch sensor 352 that detects the on / off state of the threshing clutch for power transmission to the threshing device 5 is connected to the input side of the reaping controller 354. A main shift position sensor 353 that detects the operation position of the main shift lever 12 is connected to the input side of the pre-travel controller 355. On the input side of the controller 356 after traveling, a parking brake sensor 324 that detects whether the parking brake pedal (not shown) that maintains the left and right traveling crawlers 2 that are traveling units in a braking state is turned on or off (whether or not it is in a braking state). And an auger clutch sensor 325 for detecting the on / off state of the auger clutch for power transmission to the auger 8 is connected.

  In addition, as shown in FIG. 11, the urea injection controller 122 is connected to the engine controller 121 and the controller 357 before threshing via a CAN communication bus 350 so as to communicate with each other. On the output side of the urea injection controller 122, an SCR lamp 328 as a warning lamp that flashes in association with the operation of the urea water pump 96, a urea water supply electric motor 97, a urea water injection valve 99, and a urea water temperature sensor. 126 and a urea water meter 127 are connected. Note that initial setting data regarding blinking of the SCR lamp 328 and lighting color control based on the detection result of the urea water temperature sensor 126 or the urea water amount meter 127 is stored in advance in the ROM of the controller 357 before threshing.

  Then, as shown in the flowchart of FIG. 12 (SCR supply control), when the key switch 331 is switched to the engine operation position by the operator and the warm-up operation of the diesel engine 20 is executed, the coolant temperature meter 319 of the diesel engine 20 is executed. Value, engine rotation sensor (not shown) value, urea water thermometer 126 value, urea water amount meter 127 value, and work clutch sensor 352 value are read, and when the urea water temperature is equal to or higher than a predetermined value, the urea water injection valve 99 is maintained in an operable state (a state of urea water injection OK), and when the operation of the work clutch lever 14 including the threshing clutch is detected by the work clutch sensor 352, urea water injection start control is executed. Thus, the operation of the urea water supply electric motor 97 (urea water pump 96) and the urea water injection valve 99 is controlled. When the urea water pump 96 and the urea water injection valve 99 are operated, the urea water is supplied into the urea mixing pipe 77, the urea water in the urea water tank 95 is supplied into the urea mixing pipe 77, and the first exhaust gas. Ammonia (generated by hydrolysis of urea water) is mixed in the exhaust gas from the purification case 50 to the second exhaust gas purification case 78, and the SCR catalyst for reducing urea selective catalyst in the second exhaust gas purification case 78 is mixed. And the oxidation catalyst reduces nitrogen oxides (NOx) in the exhaust gas of the diesel engine 20.

  On the other hand, when the key switch 331 is switched to the freeze prevention position by the operator, when the diesel engine 20 is not warmed up, or when the diesel engine 20 is warmed up, the urea water of the urea water thermometer 126 is stopped. When the temperature is below a predetermined value, or when the urea water injection valve 99 is not maintained in an operable state (a state of urea water injection OK), or the operation of the work clutch lever 14 with the threshing clutch is not detected by the work clutch sensor 352. In this case, when the urea water temperature of the urea water thermometer 126 is equal to or lower than the predetermined value, the urea water circulation start control is executed, and the urea water supply electric motor 97 (urea water pump 96) is controlled to operate. When the urea water temperature of the urea water thermometer 126 is below a predetermined value, the urea water pump 96 is operated to circulate the urea aqueous solution 94 in the urea water tank 95 through the urea water supply pipe 124 and the urea water return pipe 125. The urea aqueous solution 94 in the urea water supply unit 98 or the urea water tank 95 is prevented from freezing.

  Next, display control of the liquid crystal monitor 162 will be described with reference to FIGS. As shown in FIG. 13, during normal operation control in the harvesting operation of the combine, a speedometer 361 indicating the traveling speed (vehicle speed) of the traveling machine body 1, a load graph 362 indicating the engine load, A urea water remaining amount monitor 363 that notifies the amount of urea aqueous solution 94 in the urea water tank 95, a fuel meter 364 that notifies the remaining amount of fuel in the fuel tank 360 shown in FIG. 365, and a cutting shift monitor 366 that informs the setting state of the driving speed in the cutting device 3 are displayed. The urea water remaining amount monitor 363 display unit and the fuel meter 364 display unit are distributed to the left and right across the speedometer 361 display portion of the liquid crystal monitor 162, and the urea water remaining amount monitor 363 and the fuel meter 364 are mistakenly recognized by the operator. It is configured to reduce this.

  Moreover, as shown in FIG. 14, based on the cooling water thermometer 319 value of the diesel engine 20, the screen display of the liquid crystal monitor 162 is changed to warm-up operation request information. On the screen of the liquid crystal monitor 162, the character data 368 “Wait until the warm-up operation is completed”, the character data 369 “Wait until the urea water temperature rises”, and the operation indicating the function of the display changeover switch 164 are displayed. An instruction mark 370 or the like is displayed.

  As shown in FIGS. 1 and 10 to 14, the reaping device 3, the threshing device 5, the traveling machine body 1 in which the reaping device 3 and the threshing apparatus 5 are installed, and the engine room 43 on the traveling machine body 1 are installed. A first exhaust gas purification case 50 that includes the diesel engine 20 and removes particulate matter in the exhaust gas of the diesel engine 20 and a second exhaust gas purification case that removes nitrogen oxides in the exhaust gas of the diesel engine 20. In the combine including 78, the first exhaust gas purification case 50 is connected to the exhaust outlet of the diesel engine 20, and the second exhaust gas purification case 78 is connected to the first exhaust gas purification case 50 via the urea mixing pipe 77. The urea aqueous solution 94 is supplied to the urea mixing pipe 77 from the urea water tank 95 by the urea water pump 96, and the diesel engine When the temperature of the urea aqueous solution 94 in the urea water tank 95 is equal to or higher than a predetermined value when the 20 key switch 331 is turned on and the warming-up operation is completed, the urea aqueous solution 94 supply operation of the urea water pump 96 can be activated. It is composed. Therefore, during warm-up operation in which the amount of NOx generated in the diesel engine 20 is small, the supply of unnecessary urea aqueous solution 94 can be stopped, and the amount of urea aqueous solution 94 used can be reduced.

  As shown in FIGS. 3 and 10 to 14, the fuel remaining amount in the fuel tank 360 supplied to the diesel engine 20 is displayed on the left and right sides of the speedometer 361 for displaying the vehicle speed of the driving unit 10. A fuel meter 364 and a urea water remaining amount monitor 363 that displays the remaining amount of the urea aqueous solution 94 in the urea water tank 95 are arranged separately. Therefore, the fuel display unit (fuel meter 364) and the urea water amount display unit (urea water remaining amount monitor 363) are replaced with the speed display unit while the operator can check the fuel display and the urea water amount display while monitoring the speed display. It is possible to easily prevent misrecognition of the fuel remaining amount display and the urea aqueous solution remaining amount display by separating them from the left and right of the (speedometer 361).

  As shown in FIGS. 10 to 14, the urea water tank 95 between the urea water tank 95 and the urea water pump 96 when the key switch 331 as the antifreezing operation tool operated by the operator is operated to prevent freezing. Freezing prevention control for preventing the urea aqueous solution 94 stored in the urea water pump 96 or piping (the urea water supply pipe 124 and the urea water return pipe 125) from being frozen due to the circulation of the urea aqueous solution 94 therein. Is configured to start. Therefore, the urea aqueous solution 94 stored in the urea water pump 96 or the urea water supply pipe 124 or the urea water return pipe 125 can be prevented from freezing, and the urea water tank 95 or the urea water pump 96 or the urea water supply pipe 124 can be prevented. Alternatively, a heating device installed in the urea water return pipe 125 can be omitted, and the urea aqueous solution 84 is sufficiently stored in the urea water tank 95 and supplied to the urea mixing pipe 77 by the urea water pump 86. It is possible to prevent the urea aqueous solution 94 from being insufficient.

1 traveling machine body 3 reaping device 5 threshing device 10 operation unit 20 diesel engine 43 engine room 50 first exhaust gas purification case 77 urea mixed pipe 78 second exhaust gas purification case 94 urea aqueous solution 95 urea water tank 96 urea water pump 124 urea water Supply pipe (pipe)
125 Urea water return pipe (pipe)
331 Key switch (freezing prevention operation tool)
360 Fuel Tank 361 Speed Meter 363 Urea Water Level Monitor 364 Fuel Meter

Claims (3)

A reaping device, a threshing device, a traveling machine body equipped with the reaping device and the threshing device, and an engine installed in an engine room on the traveling machine body, and removing particulate matter in the exhaust gas of the engine In a combine provided with a first exhaust gas purification case that performs and a second exhaust gas purification case that removes nitrogen oxides in the exhaust gas of the engine,
The first exhaust gas purification case is connected to an exhaust outlet of the engine, the second exhaust gas purification case is connected to the first exhaust gas purification case via a urea mixing pipe, and urea water is connected to the urea mixing pipe. A structure in which a urea aqueous solution is supplied from a tank by a urea water pump, and the temperature of the urea aqueous solution in the urea water tank is equal to or higher than a predetermined level when the key switch of the engine is turned on and the warm-up operation is completed. In addition, the exhaust gas purification apparatus for a combine is characterized in that the urea aqueous solution supply operation of the urea water pump is operable.   A fuel gauge for displaying the remaining amount of fuel in the fuel tank supplied to the engine, and a remaining amount of aqueous urea solution in the urea water tank, on the left and right sides of the speedometer for displaying the vehicle speed of the driving unit. 2. The combine exhaust gas purifying device according to claim 1, wherein the urea water remaining amount monitor to be displayed is distributed and arranged.   When the antifreezing operation tool operated by an operator is operated to prevent freezing, the urea water pump or the like in the circulation of the urea aqueous solution in the urea water tank between the urea water tank and the urea water pump, etc. The combine exhaust gas purifying device according to claim 1, wherein anti-freezing control for preventing the urea aqueous solution stored in the pipe or the like from being frozen is started.

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