JP5523878B2 - Combine - Google Patents

Description

  The present invention relates to a combine equipped with an exhaust gas filter that removes fine solids in exhaust gas, and more particularly to control of a forced regeneration device that burns fine solids collected by an exhaust gas filter.

  In recent years, regulations on fine solids (particulates, PM) such as soot contained in vehicle exhaust gas have been strengthened from the viewpoint of the global environment. In vehicles equipped with diesel engines such as trucks, this PM is An exhaust gas filter is attached for removal.

  Since such an exhaust gas filter is disposed in the exhaust gas exhaust path and collects PM, if a certain amount of PM is volumed in the filter, the filter performance of the filter is lowered and the exhaust resistance is also increased. End up. Therefore, there has been known a forced regeneration device for an exhaust gas filter that raises the temperature of the exhaust gas supplied to the exhaust gas filter and burns PM in the exhaust gas filter with the heated exhaust gas (patent). Reference 1).

JP 2009-167950 A

  On the other hand, since the regeneration operation of the exhaust gas filter is performed while the vehicle is stopped, when the exhaust gas filter and the forced regeneration device are to be mounted on a working vehicle such as a combine, the forced regeneration device is in operation. There was a problem that the harvesting work could not be done.

  Therefore, the present invention operates the forced regeneration device based on the operation of turning on the lubrication switch that lubricates the pre-processing unit of the combine, and performs the lubrication work and the forced regeneration work of the filter at the same time to perform the harvesting work. The purpose is to provide a combine that makes it possible to shorten the time when it is impossible.

The present invention relates to an engine (50), a pretreatment unit (5) driven by rotation from the engine (50), and an oiling device (at least a drive unit (34) of the pretreatment unit (5)). 33) and a combine (1) comprising:
An oiling switch (32) for operating the oiling device (33);
An exhaust gas filter (80) for removing fine solids contained in the exhaust gas of the engine (50);
A forced regeneration device (82) for raising the ambient temperature around the exhaust gas filter and burning the fine solids collected in the exhaust gas filter (80);
A control unit (40, 44) for operating the forced regeneration device (82) based on a turning-on operation of the lubrication switch (32),
It is characterized by that.

The present invention also includes a transmission (45) that shifts the rotation from the engine (50) and transmits the rotation to the pre-processing unit (5).
The controller (40, 44) sets the rotational speed of the engine (50) to a rotational speed equal to or higher than the rated rotational speed used during work when the lubrication switch (32) is turned on. The transmission (45) decelerates the rotation from the engine (50) and transmits it to the pre-processing unit (5).

  In addition, although the code | symbol etc. in a parenthesis is for contrast with drawing, it does not have any influence on a claim by this.

  According to the first aspect of the present invention, forcibly regenerating the exhaust gas filter at the same time as lubrication to the drive portion of the pretreatment unit based on the operation of turning on the lubrication switch, other work such as harvesting is performed. It was possible to reduce the time that could not be done, improved work efficiency, and enabled longer continuous work.

  According to the second aspect of the present invention, the temperature of the exhaust gas discharged from the engine can be increased and the exhaust gas filter can be efficiently regenerated efficiently by increasing the engine speed based on the operation of turning on the lubrication switch. it can. Moreover, since the rotation decelerated by the transmission is transmitted to the pretreatment unit, it is possible to reliably lubricate the drive unit while slowly driving the drive unit.

The top view of the combine which concerns on embodiment of this invention. The top view of the operation part of the said combine. The oil supply route figure of the said combine. The top view of the lubrication operation part of the said combine. The control block diagram of the said combine. The timing chart explaining the control when the lubrication switch of the said combine is turned on and operated.

  Below, the combine which concerns on embodiment of this invention is demonstrated based on drawing. Note that the direction in the description is based on the state where the operator is seated on the aircraft.

[Outline of combine]
As shown in FIG. 1, the combine 1 has a machine body 3 supported by a pair of left and right crawler travel devices (not shown). The pre-processing part 5 conveyed to a threshing part) is provided so that raising / lowering is possible. In the central part of the machine body 3 is provided a driving operation unit 6 on which an operator sits and operates, and behind that, a threshing unit 7 for threshing the cereal and a post-processing unit 9 for processing the waste are provided. Yes. Further, the threshed grain is temporarily stored in the grain tank 10 provided on the side of the threshing unit 7 and behind the operation unit 6, and is discharged to the outside by the discharge auger 11. It is configured.

  The pre-processing unit 5 is provided with a plurality of dividers 12 that weed cereals, a pulling device 13 that raises cereals that have been weeded behind the dividers 12, and a reciprocating type that reaps cereals. A cutting part (not shown) having a cutting blade, a scraping and conveying device (not shown) for scraping the raised side of the culm, and a threshing part 7 for conveying the culm cut by the reaping part The cereal conveying apparatus (not shown) etc. delivered to the feed chain 16 is comprised.

  As shown in FIG. 2, the driving operation unit 6 has a driving seat 8 on which a driver is seated at the center, and an ignition key for starting an engine 50 arranged below the driving seat 8 in front of the driving operation unit 6. 4 is provided. A multi-steering lever 17 is provided on the right side of the body of the ignition key 4 to turn the body left and right and to move the pre-processing unit 5 up and down. The lower limit height of the pre-processing unit 5 is determined at an arbitrary position on the left side of the body. A cutting height dial 19 for adjusting the cutting height is provided. This cutting height dial 19 is also configured as a lift shut switch, and by performing a push operation, a threshing clutch 71 (see FIG. 5) that transmits the drive from the engine 50 to the threshing unit 7, and the threshing clutch When the pre-processing unit 5 is in the raised position with the cutting clutch 51 (see FIG. 5) connected to the pre-processing unit 5 that is provided on the downstream side of the transmission 71 and transmits the drive from the engine 50 to the pre-processing unit 5. The harvesting and transporting operation of the cereal can be stopped.

  Further, a power clutch switch 20 for turning on and off the threshing clutch 71 and the mowing clutch 51 is provided on the side of the driver's seat 8, and the engine control lever 22 that adjusts the rotational speed of the engine 50 and the vehicle body 3 are operated for speed change. Various automatic switch groups 27 such as a main transmission lever 25 and a saw depth automatic switch are provided. In addition, in front of this driving | operation operation part 6, as shown in FIG. 1, the oiling operation part 30 operated when performing oiling is provided.

  Next, the lubrication route of the combine 1 will be described based on FIG. Here, in the present embodiment, the lubrication target to be lubricated includes cutting blades (left, middle, right) 15a to 15c, pulling devices (left, left middle, right middle, right) 13a to 13d, and a scraping belt drive Chain 13e, tip stock transport chain 14a, saw depth transport chain 14b, tip transport chain 14c, stock chain (left, right) 14d, 14e, bite drive chain 14f, feed chain 16, exhaust wall chain 9a, exhaust walline 9b It is. Then, the lubricating oil stored in the tank T is lubricated by the lubrication pump P on the lubrication target based on the setting of the lubrication dial 31 provided in the lubrication operation unit 30. In the present combine 1, the lubrication dial 33, the lubrication pump P, and the tank T constitute an lubrication device 33.

  FIG. 4 is a diagram showing the configuration of the lubrication operation unit 30. When lubricating the lubrication target object with lubrication oil, first, as shown in FIG. Turn the lubrication dial 31 set at the position of, and set the lubrication position mark 31a provided on the lubrication dial 31 to any one of “exhaust wall feed chain”, “raising conveyance chain”, “cutting blade”, or Set in order. Thereafter, the lubrication switch 32 is pressed (input operation). Thereby, for example, when the lubrication position mark 31a of the lubrication dial 31 is set to “cutting blade”, the lubrication pump P shown in FIG. The 33A cutting blades (left, middle, right) 15a-15c are lubricated.

  In addition, when the lubrication position mark 31a of the lubrication dial 31 is set in the “raising and conveying chain”, the lubricating oil is caused and the conveying system 33B is raised (left, left middle, right middle, right) 13a to 13d. When the oil is set in the “exhaust straw feed chain”, the lubricating oil is supplied to the feed chain 16 and the like of the exhaust straw feed system 33C.

  FIG. 5 is a control block diagram of the combine 1. On the input side of the microcomputer 40 that constitutes a control unit that controls the operation of the combine 1, a main shift lever potentiometer 41 that detects the operation position of the main shift lever 25, The power clutch switch 20, a transport HST rotation sensor 42 that detects the rotation of the transport HST (transmission device) 45, and an oil supply switch 32 that operates the oil supply device 33 are connected. Further, on the input side of the microcomputer 40, the exhaust gas filter 80 is further disposed in the exhaust gas exhaust path from the engine 50 and removes fine solids (PM) contained in the exhaust gas. An exhaust gas filter sensor 81 is connected to determine whether minute solids have accumulated.

  On the other hand, on the output side of the microcomputer 40, a control unit is formed together with the microcomputer 40, an engine control microcomputer 44 that controls the engine 50, a transport HST control motor 43 that controls the rotation of the transport HST 45, a cutting clutch 51 and a threshing clutch 71. Is connected to a threshing / reaping clutch motor 46 and an oil pump P for turning on and off the oil, and the ambient temperature around the exhaust gas filter 80 is raised to collect the fine solid matter collected in the exhaust gas filter 80. Is connected to the forced regeneration device 82.

  The forced regeneration device 82 includes a fuel injection injector 83 that injects fuel into the exhaust gas supplied to the exhaust gas filter 80, and an ignition device 85 that ignites the injected fuel. The fuel is post-injected into the exhaust gas by the injector 83, and the temperature of the exhaust gas is raised by igniting this fuel by the ignition device 85.

  Next, control at the time of lubrication by the microcomputer 40 will be described with reference to a timing chart shown in FIG. In the present embodiment, the microcomputer 40 controls the rotational speed of the engine 50 via the engine control microcomputer 44, but the microcomputer 40 may directly control the engine 50.

  When the operator gets into the driving operation unit 6 of the combine 1, the operator confirms that the threshing and mowing clutches 71, 51 are disconnected (off), and sets the engine control lever 22 to the minimum rotational speed position and the ignition key 4. To start the engine 50.

  Then, when performing a handling operation, the power clutch switch (+) 20 is turned on once (timing a), the threshing clutch 71 is connected (turned on) by the threshing / reaping clutch motor 46, and the engine 50 is turned on. Is set to a rated rotational speed so that the rotation from the engine 50 is transmitted to the threshing unit 7 and the feed chain 16.

  The rotation from the engine 50 is output to the feed chain 16 via the transport HST 45 disposed between the threshing clutch 71 and the mowing clutch 51, and is set low rotation set near the idling rotation speed. Output after decelerating to speed. The rated rotational speed is a rotational speed used during work, and is a rotational speed near the maximum torque on the torque curve of the engine.

  On the other hand, when carrying out a normal harvesting operation in which the threshing is carried out while running on the field and harvesting the cereal, the power clutch switch (+) 20 is turned on once more from the state where the threshing clutch 71 is connected (timing). b) The mowing clutch 51 provided on the transmission downstream side of the threshing clutch 71 is connected. Thereby, the motive power from the engine 50 is transmitted to the preprocessing unit 5, and both threshing and mowing work can be performed simultaneously.

  The power from the engine 50 is also transmitted to the drive unit 34 of the preprocessing unit 5 including the cutting blade 15 and the saw depth conveying chain 14 through the conveying HST 45. The conveying HST 45 When the clutch 71 is connected, it is stopped, and the drive unit 34 of the preprocessing unit 5 is interlocked with the vehicle speed.

  In this state, when the operator increases the speed of the main transmission lever 25 (timing cd), the speed increase operation of the main transmission lever 25 is detected by the main transmission lever potentiometer 41, and the vehicle speed is set to the maximum vehicle speed (MAX). ). Along with this, the rotation speed of the transport HST that has been stopped increases from 0 to the maximum rotation speed (MAX) in conjunction with the vehicle speed, and the combine 1 performs the harvesting operation while traveling in the field.

  In this state, after harvesting and mowing for a predetermined time (timing de), when the harvesting operation is completed, the operator decelerates the main shift lever 25, and the vehicle speed, which has been MAX until then, drops to 0. (Timing ef). Along with this, the combine 1 is stopped, and the rotation of the transport HST 45, which has been the maximum rotation speed (MAX) until then, becomes 0 in conjunction with the vehicle speed.

  Thereafter, when the power clutch switch (−) 20 is turned on once (timing g), the chopping clutch 51 is turned off by the threshing / reaping clutch motor 46, and the transport HST 45 is set to a low rotation which is a manual rotation. After that, when the power clutch switch (−) 20 is turned on again (timing h), the threshing clutch 71 is turned off by the threshing / reaping clutch motor 46, the conveyance HST 45 is stopped, and the engine 50 is in the idling state. Become.

  By the way, the operator turns on (turns on) the lubrication switch 32 (timing i) before the harvesting work or when the work is once interrupted and resumed again (timing i). Lubricate the drive unit 34 and the feed chain 16.

  Here, when the lubrication switch 32 is turned on and operated (ON), the microcomputer 40 outputs an electrical command to the engine control microcomputer 44 to set the engine 50 from the idling rotational speed to the rated rotational speed, The mowing clutch motor 51 connects the mowing clutch 51 and the threshing clutch 71. Further, the conveyance HST 45 is controlled to reduce the rotational speed from the engine 50 to a set low rotational speed that is a hand-operated rotational speed, and outputs it to the drive unit 34 of the preprocessing unit 5, and the cutting blade 15 and the feed chain 16. Etc. are driven at a low speed at which the lubricating oil does not scatter in the driving direction.

  Further, the microcomputer 40 drives the cutting blade, the feed chain 16 and the like at a low speed as described above, and turns on the lubrication pump P. Thereby, the lubricating oil stored in the tank T is selectively lubricated to the system set by the lubrication dial 31. When a predetermined set time T necessary for lubrication elapses (timing j), the threshing / reaping clutch motor 46 is turned off to turn off the reaping clutch 51 and the threshing clutch 71, and the engine 50 is set to idling rotation. Thereby, lubrication is completed.

  On the other hand, when the lubrication switch 32 is turned on and operated, the microcomputer 40 outputs an electrical command to the forced regeneration device 82 to perform the forced regeneration operation of the exhaust gas filter 80 (the forced regeneration device 82 is switched). Actuate).

  Specifically, as described above, the rotational speed of the engine 50 is increased to a rated rotational speed that is close to the maximum rotational speed of the engine, and the engine 50 rotates at a high speed, so that the temperature becomes higher than usual. The fuel is post-injected into the exhaust gas upstream of the exhaust gas filter 80 by the fuel injector 83, and this fuel is ignited by the ignition device 85.

  As a result, the temperature of the exhaust gas rises, and the heated exhaust gas is supplied to the exhaust gas filter 80 for the time T required for lubrication, and the ambient temperature around the exhaust gas filter is increased. 80 burns the collected fine solids.

  As described above, by performing the forced regeneration work of the exhaust gas filter simultaneously with the lubrication work based on the operation of turning on the lubrication switch 32, the time during which other work such as the harvesting work cannot be performed is reduced. As a result, work efficiency was improved and longer continuous work became possible.

  Further, by increasing the engine speed based on the operation of turning on the lubrication switch 32, the temperature of the exhaust gas discharged from the engine can be increased, and the exhaust gas filter can be efficiently regenerated. Furthermore, since the rotation decelerated by the transport HST 45 is transmitted to the pretreatment unit 5, oiling can be reliably performed while driving the drive unit 34 slowly.

  Further, the forced regeneration work of the exhaust gas filter 80 is performed at the same time as the oiling work performed a plurality of times during the day, for example, at the start of the harvesting work and at the start of the afternoon work, and the combine 1 However, since the work is carried out at the rated rotational speed during the harvesting work, the amount of the fine solids deposited on the exhaust gas filter 80 is relatively small, so that the time for the forced regeneration work matches the time for the lubrication work. Can be made.

  That is, even if the time required for the lubrication operation is shorter than the time necessary for regenerating the exhaust gas filter 80 sufficiently, the lubrication operation is performed a plurality of times, and the minute amount accumulated during the operation in the meantime. Since there are relatively few solids, the performance of the exhaust gas filter 80 can finally be fully recovered.

  In the present embodiment, the forced regeneration device 82 is always operated when the lubrication switch 32 is turned on, but the exhaust gas filter sensor 81 clogs the exhaust gas filter 80. The forced regeneration work may be performed only when it is detected.

  In addition, a switch for turning on / off the forced regeneration automatic control may be provided so that the forced regeneration automatic control can be canceled, and the forced regeneration can be stopped by pressing the lubrication switch 32 twice. May be.

  Further, the microcomputer 40 and the engine control microcomputer 44 may set the engine rotation speed to a higher rotation speed than the rated rotation speed during the forced regeneration work, and the engine rotation speed near the idling rotation when the forced regeneration work is not performed. It may be set to a set low rotation speed that is a hand-operated rotation speed.

  Further, in this embodiment, the exhaust gas filter 80 is forcibly regenerated by post-injecting fuel, but other types of forced regeneration devices such as a catalyst type may naturally be used. Further, the transport HST may be a belt-type continuously variable transmission or a multi-stage stepped transmission. In addition, transmission to the waste chain 9a and the waste tine 9b may be performed via the transport HST 45, and the lubrication device 33 is configured to lubricate at least the drive unit of the pretreatment unit 5. Well, in addition to the drive part of the pretreatment part 5 and the waste chain 9a, the work machine mounted on the combine such as the threshing part 7 is configured to lubricate any part where lubrication is required. May be.

  In addition, the lubrication dial 31 may be switched by an electric motor to automatically lubricate each part of the work machine (cutting blade, raising conveyance chain, waste feed chain, etc.) in order. That is, the time T required for lubrication may be set by setting the time required for lubrication to the cutting blade, the raising conveyance chain, the waste feed chain, etc. as one unit.

1 Combine 5 Pre-processing section 32 Lubrication switch 33 Lubrication device 40 Control section (microcomputer)
44 Control unit (engine control microcomputer)
45 Transmission (Transport HST)
50 Engine 80 Exhaust gas filter 82 Forced regeneration device

Claims (2)

In a combine comprising an engine, a pretreatment unit that is driven by rotation from the engine, and an oiling device that lubricates at least the drive unit of the pretreatment unit,
An oiling switch for operating the oiling device;
An exhaust gas filter for removing fine solids contained in the exhaust gas of the engine;
A forced regeneration device that raises the ambient temperature around the exhaust gas filter and burns the fine solids collected in the exhaust gas filter;
A control unit for operating the forced regeneration device based on an operation of turning on the lubrication switch; and
Combine that is characterized by that. A transmission for shifting the rotation from the engine and transmitting it to the preprocessing unit;
When the operation of turning on the lubrication switch is performed, the control unit sets the rotational speed of the engine to a rotational speed that is equal to or higher than a rated rotational speed used during work, and causes the transmission to rotate from the engine. Decelerate and transmit to the pre-processing unit,
The combine according to claim 1.

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