JP5345898B2 - Combine EGR device - Google Patents

Description

  The present invention provides an EGR cooler for EGR cooling in an EGR device that recirculates a part of exhaust gas discharged from an engine block having a common rail that supplies fuel to a multi-cylinder injector to the engine block. About.

  Conventionally, a so-called EGR device for recirculating combustion exhaust gas is provided in a prime mover portion of a combine. That is, an EGR device is provided in which a part of the exhaust gas discharged from the engine block having a common rail for supplying fuel to the multi-cylinder injector is recirculated and returned to the engine block again.

  Such an EGR device, together with the common rail, contributes to the problem of exhaust gas regulation, combustion efficiency, and fuel consumption reduction, and has been employed particularly in large-scale combiners.

  And, as shown in Patent Document 1, in an engine having an EGR device, the EGR cooler and the intake pipe attached thereto, the EGR valve case, the check valve, and the like are continuously connected without using a flexible pipe. However, there is disclosed a technique that enables smooth assembly work on a production line.

  Further, as shown in Patent Document 2, in an engine in which an EGR cooler is interposed between the exhaust merging passage and the intake distribution passage, the EGR cooler is erected in the front-rear direction on the lateral side of the cylinder block and directly above it. Positioning the exhaust merging passage wall to suppress damage to the EGR cooler due to overheating of the exhaust merging passage, and improving the function of the EGR cooler by effectively blowing the engine cooling fan to the EGR gas outlet pipe This technique is disclosed.

  Further, as shown in Patent Document 3, the engine is configured by arranging the EGR cooler and the EGR valve case next to each other and arranging the EGR cooler and the EGR valve case along the intake distribution passage wall. A technique that can be downsized and that can suppress damage to the EGR cooler due to overheating of an intake distribution passage or an engine as much as possible is disclosed.

JP 2005-273610 A JP 2007-92595 A JP 2008-75632 A

  The technologies related to the EGR device and the EGR cooler described in the conventional Patent Documents 1, 2, and 3 are disclosed as technologies specific to the engine, and in which position the EGR cooler is arranged in the engine device of the combine; There is no disclosure of any specific technology, such as what kind of merits the structure and function of the combine will cause by the arrangement, and in particular, the relationship between the outer shape of the combine engine device and the technology peculiar to the arrangement is not.

Therefore, in order to solve the above-mentioned problem, the invention according to claim 1 is configured to convey the cereals harvested by the harvesting unit to the threshing unit, and to collect the grains while sorting at the threshing unit. In the combine in which the engine device is disposed on the lateral side of the threshing portion, the engine device includes an engine block and a cooling unit disposed on the engine block, and the engine block is a cylinder block. When the exhaust manifold is installed in the upper front of the cylinder block, and a intake manifold installed in the upper rear of the cylinder block, a between the exhaust manifold and the intake manifold, the engine block by providing an EGR cooler for exhaust gas regeneration recycle the left side, between the engine and threshing section of the same EGR cooler Arrangement and, by rotation of the cooling fan provided in the cooling unit and the air sucked from the outside air inlet provided in the engine cover, and guiding the sucked air in the cooling unit cover provided in the side wall of the cooling unit, The air was discharged from the cooling air discharge opening opened on the left side surface and led to the lower part of the fuselage through the gap between the threshing part and the engine device .

  According to a second aspect of the present invention, there is provided an EGR device for a combine according to the first aspect, wherein the EGR cooler is disposed in a space formed above the flywheel behind the engine.

According to the first aspect of the present invention, the cereals harvested by the reaping part are transported to the threshing part, and the grain is collected while being sorted by the threshing part, and the engine is disposed laterally of the threshing part. In the combine in which the device is arranged, the engine device is composed of an engine block and a cooling unit arranged at the upper part of the engine block, and the engine block is installed in front of the cylinder block and the upper part of the cylinder block. an exhaust manifold that is, the a intake manifold that is disposed above the rear of the cylinder block, a between the intake manifold and the exhaust manifold, EGR for exhaust gas regeneration recycle on the left side of the engine block by providing the cooler, arranged the EGR cooler between the engine and the threshing section, provided on the cooling unit The cooling fan discharges the air from the outside intake port provided in the engine cover by the rotation of the rejection fan, and guides the sucked air to the cooling unit cover provided in the side wall of the cooling unit. By disposing the EGR cooler between the engine and the threshing part by guiding it to the lower part of the fuselage through the gap between the threshing part and the engine device , the EGR cooler is made as possible against impact from the outside. The cooling function of the EGR cooler can be further improved by guiding the cooling air generated by the rotation of the cooling fan provided in the cooling unit to the lower part of the body through the gap between the threshing part and the engine device. is there.

  According to the invention of claim 2, since the EGR cooler is disposed in a space formed behind the engine block and above the flywheel, when the flywheel is originally provided so as to protrude from the side surface of the engine block, the EGR cooler is disposed above the flywheel. A constant space is formed, and an EGR cooler can be arranged in the constant space. Unnecessary space can be used effectively, and the EGR cooler has a constant volume in the middle of the EGR pipe. Since it is formed as a case with such a configuration, the space above the flywheel on the side of the engine block occupies the space above the flywheel can be used as a cooling space, and the cooling function of the EGR cooler can be further improved. The cooling efficiency of circulating exhaust gas can be increased, and the entire engine system can be consolidated in a compact manner. To.

It is a right view which shows the structure of the combine in which the EGR apparatus of the combine of this invention is used. It is a top view which shows the structure of the combine in which the EGR apparatus of the combine of this invention is used. It is a front view of the engine apparatus which attached the combine EGR apparatus which concerns on embodiment of this invention. It is a left view of the engine apparatus which attached the EGR apparatus of the combine which concerns on embodiment of this invention. It is a right view of the engine apparatus which attached the EGR apparatus of the combine which concerns on embodiment of this invention.

  Hereinafter, an EGR device for a combine according to an embodiment of the present invention will be described in detail with reference to the drawings.

First, the overall configuration of the combine 1 in which the engine device of the present invention is used will be described.
FIG. 1 is a right side view showing the configuration of the combine 1, and FIG. 2 is a plan view showing the configuration of the combine 1. The combine 1 includes a traveling unit 3, a cutting unit 4, a threshing unit 5, a sorting unit 6, a grain storage unit 7, a waste processing unit 8, a grain discharging device 22, an engine device 9, and a maneuvering unit fixed to the body frame 2. Part 10 is provided. In the following description, the traveling direction of the combine 1 is the front side, and the right side, the left side, and the rear side with respect to the traveling direction.

  The traveling unit 3 is installed in the lower part of the body frame 2. The traveling unit 3 includes a crawler type traveling device 11 having a pair of left and right crawlers, and is configured to be able to travel in the forward or backward direction.

  The cutting unit 4 is installed so as to be movable up and down with respect to the front end of the machine body frame 2. The cutting unit 4 includes a weeding tool 12, a scraping reel 13, a cutting device 14, a conveying device 15, and the like. The weeding tool 12 weeds the cereals in the field, the take-up reel 13 rakes in the cereals after weeding, the cutting device 14 cuts the stock of the cereal after taking-in, and the conveying device 15 It is comprised so that the cereal grain after a cutting | disconnection can be conveyed to the threshing part 5. FIG.

  The threshing unit 5 is installed on the left side of the body frame 2 and behind the reaping unit 4. The threshing unit 5 includes a handling cylinder, a receiving net (concave), and the like (not shown). The threshing unit 5 is configured such that the threshing can be caused to leak by threshing the conveyed cereal meal while being fed backward.

  The sorting unit 6 is installed on the left side of the machine body frame 2 and below the threshing unit 5. The sorting unit 6 includes a swing sorting device, a wind sorting device, a grain transport device 20 and the like. The swing sorter sorts the cereals that have leaked from the threshing unit 5 by swinging, and the wind sorter winds and sorts the grains and sawdust etc. The conveyance device 20 is configured to be able to convey the selected grain to the grain storage unit 7.

  The grain storage unit 7 is located on the right side of the machine body frame 2 on the right side front and rear, and on the right side of the threshing unit 5 and the sorting unit 6. The grain storage unit 7 includes a grain tank 21 and the like, and is configured to store the grain conveyed from the selection unit 6 in the grain tank 21. The grain discharging device 22 is connected to the grain tank 21 so that the grain can be discharged from the grain tank 21 in an arbitrary direction with respect to the machine body.

  The base of the grain discharging device 22 is installed in the storage chamber 23 behind the engine device 9. The grain discharging device 22 is installed so as to be rotatable at an arbitrary angle in the horizontal direction with the base as a rotation axis, and is configured to be able to discharge the grain stored in the grain tank 21 in an arbitrary direction outside the machine body. Yes.

  The waste disposal unit 8 is installed on the left rear end of the machine body frame 2 below the threshing unit 5 and behind the sorting unit 6. The rejection processing unit 8 includes a spreader. The spreader is configured to be able to uniformly diffuse and release the threshed culm from the threshing unit 5 to the field.

  The engine device 9 is located on the right rear side of the machine body frame 2, behind the grain storage unit 7 and on the right side of the threshing unit 5. The right side of the engine device 9 is covered with an engine cover 81. An outside air inlet 82 is opened in the upper part of the engine cover 81, and a dust removing device (not shown) is installed on the machine body side. When the cooling fan 66 shown in FIG. 4 rotates, a dust removal process is performed on the outside air sucked into the engine room. The engine device 9 includes an engine block 29 made of a diesel engine and a cooling unit 30 disposed on the upper portion of the engine block 29. The engine device 9 is configured to be able to drive the move of the combine 1, the cutting unit 4, the threshing unit 5, and the like.

  The control unit 10 is a right front part of the body frame 2 and is installed in front of the grain storage unit 7. The control unit 10 includes an operation tool including a steering handle, a shift lever, and the like, a control seat, a cabin, and the like. An operator can sit on the cockpit, and the cabin is configured to surround the cockpit.

  The combine 1 is configured so that power from the engine device 9 can be transmitted to the traveling unit 3, the mowing unit 4, the threshing unit 5, the sorting unit 6, the waste processing unit 8, and the like by an operator's operation. The combine 1 is harvested by the reaping unit 4 while being moved by the traveling unit 3, the cereal is transported to the threshing unit 5 by the conveying device 15, and the threshing unit 5 threshs the cereal from the cereal and selects it. The part 6 is configured to sort the sawdust and the grain and store the sorted grain in the grain storage unit 7.

Next, the configuration of the engine device 9 in which the EGR device of the combine 1 according to the embodiment of the present invention is used will be described in detail.
FIG. 3 is a front view of the engine device 9, FIG. 4 is a left side view of the engine device 9, and FIG. 5 is a right side view of the engine device 9. The engine device 9 is on the rear end side of the grain tank 21 and is disposed on the right side surface side of the grain transport device 20. The engine device 9 includes an engine block 29 and a cooling unit 30, and is installed on the body frame 2. The cooling unit 30 is located above the engine block 29 and is installed on the box-type gantry 28.

  In the engine block 29, the crankshaft 32, which is an output shaft, faces a direction orthogonal to the front-rear direction of the combine 1. The engine block 29 is installed on the cylinder block 31, the exhaust manifold 33 installed on the upper front side of the cylinder block 31, the intake manifold 34 installed on the upper rear side of the cylinder block 31, and the intake manifold 34 side of the cylinder block 31. The common rail 35 and the fuel filter 64 are provided, and an oil pan 39 is provided below the cylinder block 31.

  The crankshaft 32 protrudes from both side surfaces of the cylinder block 31, and a flywheel 36 and a pulley 37a are rotatably mounted on the left side protrusion, and a pulley 37b is rotatably mounted on the right side protrusion. An EGR cooler 38 for exhaust gas regeneration circulation is disposed on the flywheel 36. The EGR cooler 38 is the left side surface of the engine block 29 and is disposed on the threshing unit 5 side above the flywheel 36. The EGR cooler 38 constitutes an EGR device together with the EGR valve 65. The EGR cooler 38 is installed between the exhaust manifold 33 and the EGR valve 65, cools the recirculated exhaust gas from the exhaust manifold 33, and supplies the recirculated exhaust gas to the intake manifold 34 via the EGR valve 65.

  As described above, the EGR cooler 38 is disposed in the upper space of the flywheel 36 and is openly installed on the threshing portion 5 side of the combine 1, so that the cooling function of the EGR cooler 38 can be improved, and from the outside It is possible to protect against impact as much as possible. Moreover, since it installed in the upper space of the flywheel 36, the whole engine apparatus 9 can be integrated compactly.

  The base 44 is installed on the body frame 2 in front of the engine block 29. A pulley is pivotally supported at the upper end of the base 44 and is connected to the pulley 37a by a V-belt so that the rotation of the diesel engine can be transmitted.

  A supercharger 40 is fixed on the front upper portion of the cylinder block 31. The supercharger 40 includes a compressor case 42 having a built-in broiler wheel and a turbine case 43 having a turbine wheel. The compressor case 42 is disposed on the left side and the turbine case 43 is disposed on the right side with respect to the cylinder block 31. . The supercharger 40 pressurizes the intake gas using the exhaust gas pressure.

  The first intake pipe 53 connected to the compressor case 42 communicates with the air cleaner 52 and further communicates with the pre-cleaner 50 via the intake duct 51. The first intake pipe 53 and the air cleaner 52 are installed outside the left side surface of the cooling unit 30, that is, on the threshing unit 5 side. An exhaust gas intake pipe 59 and an exhaust pipe 57 a are connected to the turbine case 43. The exhaust gas intake pipe 59 communicates with the exhaust manifold 33 and extracts exhaust gas of the diesel engine. A DPF case 58 containing a diesel particulate filter communicates with the exhaust pipe 57a, and further communicates with the muffler 56 and further with the tail pipe 55 via the exhaust pipe 57b. The DPF case 58 is installed on the front outer surface of the cooling unit 30, and the muffler 56 is an upper part of the air cleaner 52, and is installed between the left side surface of the cooling unit 30 and the threshing unit 5. The DPF case 58 can be replaced with a muffler 56.

  Exhaust gas from the exhaust manifold 33 is introduced to the turbine side of the supercharger 40 through the exhaust gas intake pipe 59. The exhaust gas discharged from the supercharger 40 is introduced into the DPF case 58 through the exhaust pipe 57b, and is released to the atmosphere through the exhaust pipe 57a, the muffler 56, and the tail pipe 55. The intake gas (atmosphere) is introduced to the turbine side of the supercharger 40 via the precleaner 50, the intake duct 51, the air cleaner 52, and the first intake pipe 53.

Next, the configuration of the cooling unit 30 will be described.
The cooling unit 30 is installed on a box-shaped gantry 28 above the engine block 29. The box-shaped gantry 28 is composed of a quadrilateral frame that is open on the left and right sides, and forms a cooling space partitioned from the engine block 29 by housing the cooling unit 30 in the space inside the quadrilateral frame.

  The cooling unit 30 includes a cooling fan 66, a radiator 68, an intercooler 62, an oil cooler 71, and a fuel cooler 49. The cooling fan 66 is disposed on the left side of the cooling unit 30, that is, on the threshing unit 5 side. The radiator 68 is disposed facing the right side of the cooling fan 66. The oil cooler 71 is installed facing the upper part of the right side surface of the radiator 68. The intercooler 62 is disposed facing the lower front side of the right side surface of the oil cooler 71. The fuel cooler 49 faces the lower rear side of the right side surface of the oil cooler 71 and is arranged in parallel with the intercooler 62.

  These various cooling means are surrounded by a shroud (not shown) installed on the upper and lower surfaces and the front and rear surfaces, an engine cover 81, and a cooling unit cover 67 installed on the left side surface. The engine cover 81 has an open air inlet 82 at a corresponding position on the right side of the cooling unit 30, and the cooling unit cover 67 has a cooling air discharge opening 76 at a corresponding position on the cooling fan 66.

  The cooling fan 66 is rotatably supported by a beam portion provided on the upper left side surface of the box-type gantry 28. The cooling fan 66 includes an engine block via a V-belt provided between the fan-side pulley 48 and the pulley 46 of the base 44, and a V-belt 45 provided between the pulley 46 of the base 44 and the pulley 37 a of the crankshaft 32. It is rotated by the rotational power from 29. As the cooling fan 66 rotates, air is sucked from the outside air inlet 82 provided in the engine cover 81, and this sucked air is guided to the cooling unit cover 67 provided on the side wall of the cooling unit 30 to cool various cooling means. Then, the air is discharged from the cooling air discharge port 76 opened on the left side. Further, the discharged cooling air is guided to the lower part of the machine body through the gap between the threshing unit 5 and the engine device 9.

  The radiator 68 releases the heat of the cooling water that circulates around the engine block 29. A cooling water discharge port 74 for discharging cooling water is installed at the upper center of the right side surface of the engine block 29. The cooling water first pipe 69 has one end connected to the cooling water discharge port 74 and the other end connected to the cooling water intake port above the radiator 68. One end of the second cooling water pipe 70 is connected to a cooling water outlet at the lower portion of the radiator 68, and the other end is connected to a cooling water inlet 77 provided at the center of the right side surface of the engine block 29. The first cooling water pipe 69 is erected along the front inner surface of the cooling unit 30, bends in the vicinity of the upper surface, extends rearward, and communicates with the cooling water intake at the top of the radiator 68.

  The oil cooler 71 cools hydraulic oil composed of various hydraulic cylinder oils. The oil cooler 71 flows in the heated hydraulic oil from the hydraulic oil inlet 73 and discharges the cooled hydraulic oil from the hydraulic oil outlet 72. The hydraulic oil inlet 73 and the hydraulic oil outlet 72 are installed on the front end surface of the oil cooler 71.

  The intercooler 62 cools the mixed gas of intake air and exhaust gas compressed by the supercharger 40 and supplies it to the intake manifold 34. The first supercharging pipe 61 has one end connected to the compressor case 42 of the supercharger 40 and the other end connected to the mixed gas inlet of the intercooler 62. The first supercharging pipe 61 extends horizontally from the compressor case 42 between the cooling unit 30 and the engine block 29 from the left side surface of the engine block 29 toward the right side surface, and is provided at the front bottom of the intercooler 62. Connect to the gas inlet.

  The second supercharging pipe 63 is connected at one end to a mixed gas discharge port provided at the bottom of the intercooler 62, bent to extend between the cooling unit 30 and the engine block 29 in the rear horizontal direction, and further downward And is connected to the mixed gas inlet of the EGR device.

  The fuel cooler 49 cools the fuel supplied to the common rail 35. A feed pump (not shown) pumps fuel from the fuel tank and sends it to the fuel cooler 49. The fuel cooler 49 flows in fuel from a fuel inflow port 78 installed at the lower part of the rear side surface, and flows out fuel from a fuel delivery port 79 installed at the upper part of the rear side surface.

  As described above, in the present invention, the EGR cooler 38 is the upper space of the flywheel 36 of the engine block 29, and the cooling function of the EGR cooler 38 can be improved by installing the EGR cooler 38 on the threshing portion 5 side. The entire engine device 9 can be configured compactly.

  In the present embodiment, various cooling means are integrated into the cooling unit 30 and installed on the upper part of the engine block 29, but the present invention is not limited to this. A cooling fan or a radiator may be installed on the left side surface of the engine block, and other cooling means may be installed around the engine block.

DESCRIPTION OF SYMBOLS 1 Combine 2 Airframe frame 3 Traveling part 4 Mowing part 5 Threshing part 6 Sorting part 7 Grain storage part 8 Exhaust processing part 9 Engine apparatus 10 Control part 29 Engine block 30 Cooling unit 33 Exhaust manifold 34 Intake manifold 35 Common rail 38 EGR cooler 65 EGR valve

Claims (2)

In the combine which conveys the cereals harvested in the reaping part to the threshing part and collects the grains while selecting in the threshing part, and in which the engine device is arranged on the lateral side of the threshing part,
The engine device comprises an engine block and a cooling unit disposed on the engine block,
The engine block includes a cylinder block, an exhaust manifold installed at the upper front of the cylinder block, and an intake manifold installed at the upper rear of the cylinder block,
Wherein a between the exhaust manifold and the intake manifold, by providing an EGR cooler for exhaust gas regeneration recycle on the left side of the engine block, arranged the EGR cooler between the engine and the threshing unit,
By rotating the cooling fan provided in the cooling unit, air is sucked from the outside air inlet provided in the engine cover, and the sucked air is guided to the cooling unit cover provided in the side wall of the cooling unit, and on the left side surface. An EGR device for a combine that discharges from an open cooling air discharge port and guides it to the lower part of the fuselage through a gap between the threshing portion and the engine device.   The combine EGR apparatus according to claim 1, wherein the EGR cooler is disposed in a space formed behind the engine and above the flywheel.

Images