JP2016050530A - Work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work vehicle which can prevent automatic regeneration control from being executed in non-appropriate timing such as presence of combustibles on an exhaust side of the exhaust gas, in the work vehicle for executing automatic regeneration control performing regeneration of a capture filter automatically, when clogging of the capture filter for capturing fine solid materials contained in exhaust gas discharged from an engine occurs.SOLUTION: A work vehicle comprises: clogging detection means 33; regeneration means for heating captured fine solid materials and removing them; information acquisition means for acquiring information about a side where exhaust gas is discharged; and a control part 19 for executing automatic regeneration control for automatically performing regeneration by the regeneration means when the clogging is detected. The control part 19 transmits the acquired information acquired by the information acquisition means to an operator or determines whether the automatic regeneration control is to be executed or not on the basis of the acquired information.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a work vehicle including a capture filter that captures minute solids contained in exhaust gas exhausted from an engine.

  A capture filter for capturing fine solids contained in exhaust gas exhausted from the engine, a clogging detecting means for detecting clogging of the capture filter, and heating and removing the fine solids captured by the capture filter Automatic regeneration control for automatically regenerating the capture filter via the regeneration means is executed on the condition that at least one condition is that the capture means is detected by the regeneration means and the clogging detection means. A work vehicle including a control unit is known (for example, refer to Patent Document 1).

Japanese Patent No. 524444

  In the work vehicle described in the above document, the regeneration of the capture filter is automatically performed by the regeneration means, which is highly convenient. On the other hand, during the execution of the automatic regeneration control, high-temperature exhaust gas is exhausted. If flammables are present on the side, there is a risk of fire.

  The present invention provides a work vehicle that performs automatic regeneration control for automatically regenerating a capture filter when clogging occurs in a capture filter that captures minute solids contained in exhaust gas exhausted from an engine. It is an object of the present invention to provide a work vehicle capable of preventing automatic regeneration control from being executed at an inappropriate timing such as when exhaust gas has a combustible material on the exhaust side.

  In order to solve the above-mentioned problem, first, a capture filter 14 that captures minute solids contained in exhaust gas exhausted from the engine 11, a clogging detection means 33 that detects clogging of the capture filter 14, The capture filter 14 is clogged by the regeneration means for heating and removing the fine solid matter captured by the capture filter 14, the information acquisition means for acquiring information on the exhaust gas exhaust side, and the clogging detection means 33. And a control unit 19 that executes automatic regeneration control for automatically regenerating the capture filter 14 via the regeneration unit, on the basis of at least one condition that it is detected that the control unit 19 is detected. When the clogging detection means 33 detects that the capture filter 14 is clogged, the information acquired by the information acquisition means is indirectly or directly Transmitted to the operator or, or, based on the obtained information, it is characterized in that determines whether or not to restrict the execution of the automatic regeneration control.

  Secondly, the information acquisition means is a camera 34 that captures an image of the exhaust gas exhaust side, and includes a monitor 37 that displays an image captured by the camera 34 to an operator. An image photographed by the camera 34 is displayed on the monitor 37 under the condition that the clogging detection means 33 detects that the capture filter 14 is clogged.

  Third, the information acquisition means includes obstacle detection means 34, 42, and 43 for detecting an obstacle on the exhaust gas exhaust side, and the control unit 19 uses the clogging detection means 33 to detect the capture filter 14. When it is detected by the obstacle detection means 34, 42, 43 that an obstacle is present on the side where the exhaust gas is exhausted, It is characterized in that the execution of the reproduction control is restricted, or the notification by the notification means 38 that notifies the operator is executed.

  When the trapping filter is clogged and it becomes necessary to execute regeneration control, the operator or the control unit executes regeneration control at that time using the information on the exhaust gas exhaust side. Therefore, it is possible to determine whether or not it is possible to perform the reproduction control at a more appropriate timing.

  In particular, the information acquisition unit is a camera that captures an image of the exhaust gas exhaust side, and includes a monitor that displays an image captured by the camera to an operator, and the control unit is captured by the clogging detection unit. According to at least one condition that the filter is detected to be clogged, an image captured by the camera is displayed on the monitor. By automatically confirming the image captured by the camera on the monitor, The operator can easily determine whether or not the reproduction control can be executed.

  Further, the information acquisition means is an obstacle detection means for detecting an obstacle on the exhaust gas exhaust side, and the control unit detects that the capture filter is clogged by the clogging detection means. If the obstacle detection means also detects that an obstacle is present on the exhaust gas exhaust side, the execution of the automatic regeneration control is restricted, or the operator is notified. According to the one that performs notification by the notification means that performs the automatic regeneration control is performed in a state where there is no obstacle on the exhaust gas exhaust side, the execution timing of the automatic regeneration control is more Become appropriate.

It is a whole side view of the self-removing combine to which the present invention is applied. It is a top view which shows the structure of a control part. It is a top view which shows the structure of a subtransmission lever. It is a block diagram of the microcomputer mounted in this combine. It is a flowchart which shows the process sequence for execution of automatic reproduction | regeneration control. It is a processing flow figure for execution of automatic regeneration control concerning another embodiment.

  FIG. 1 is an overall side view of a self-removing combine to which the present invention is applied. The combine is provided with a threshing device (not shown) on the left half (hereinafter, left) side in the traveling direction on the machine frame 2 supported by a pair of left and right crawler type travel devices (travel units) 1 and on the machine frame 2. A traveling machine body 6 is configured by providing the steering unit 3 on the front side and the Glen tank 4 on the rear side of the right half of the vehicle, and a pre-processing unit (cutting part) 7 for performing a cutting operation is provided on the front side of the traveling machine body 6. It is connected so that it can move up and down.

  During traveling in the field, the pre-processing unit 7 raises the cereals of the field that have been weeded by the divider 8 and guided rearward by the pulling device 7a, and then cut by the cutting blade 7b, and then by the transfer device 7c. It conveys backward to the threshing part side. The cereals conveyed to the threshing unit side are transferred to a threshing feed chain (not shown) that has an annular shape in the front-rear direction, and are rotated and driven in the process of being conveyed backward by the threshing feed chain (not shown). It is treated by slaughtering (threshing process) by etc. and is rejected.

  The waste is transported rearward by a waste transporting body (not shown) and discharged from the rear end of the traveling machine body 6 to the outside of the machine. On the other hand, the processed product that has been threshed by the handling cylinder or the like is subjected to a sorting wind generated by a rocking sorter (not shown), a tang fan (not shown) or the like, and waste such as sawdust and cereal such as straw. The discharged matter is sorted out into grains, discharged from the rear end of the traveling machine body 6 to the outside of the machine, and the grains are transported to the Glen tank 4 and stored.

  The grain in the grain tank 4 is discharged out of the machine by a cylindrical auger 9 whose base end is supported on the right side of the rear end portion of the traveling machine body 6. Incidentally, the auger 9 is supported so as to be able to swing up and down and turn left and right, and an auger discharge spiral (not shown) is housed in the auger 9. The grain is discharged from the tip side of the auger 9.

  A threshing feed chain and the above-mentioned various devices on the pre-processing unit 7 side, and a reaping side working unit for cutting and conveying cereals, a handling cylinder and a swing sorter, etc. The threshing side working unit that performs the sorting process and the above-described crawler type traveling devices 1 are each driven by the power generated by the engine 11.

  The engine 11 is housed in an engine room (not shown) that is formed directly below the seat 12 on which the operator of the control unit 3 is seated and that is open on the outside (right side in the illustrated example). This is a fixedly installed diesel engine. The right side which is the open side of the engine room is covered with an engine cover 13 so as to be freely opened and closed.

  The power transmission structure will be described. The above-mentioned mowing side working unit has a stepless transmission of engine power through a transfer HST (not shown) which is a hydraulic stepless transmission that transmits power steplessly. Is done. In addition, in the middle of the power transmission path from the transport HST to the preprocessing unit 7 side (specifically, the pulling device 7a, the cutting blade 7b, the transporting device 7c, etc.), A mowing clutch (not shown) that interrupts transmission is arranged.

  Incidentally, since the power transmission path from the transport HST to the pre-processing unit 7 and the power transmission path from the transport HST to the threshing feed chain are provided independently from each other, the above-described threshing may be caused by the intermittent connection of the cutting clutch. The power transmission to the feed chain is not interrupted.

  Engine power is intermittently transmitted to the above-described threshing side working unit via a threshing clutch (not shown). By the way, in the illustrated combine, a threshing clutch is arranged in the middle of the power transmission path from the engine 11 to the transport HST. Therefore, in addition to cutting the power transmission to the threshing working part side by the cutting operation of the threshing clutch. Also, the power transmission to the mowing side is cut off.

  Engine power is transmitted to the left and right crawler type traveling devices 1 through an auxiliary transmission and a main transmission (not shown) that constitute the traveling transmission. The main transmission is configured by a traveling HST that is a hydraulic continuously variable transmission that continuously transmits power from the engine 11. The auxiliary transmission is arranged in the middle of the power transmission path from the traveling HST to each crawler traveling device 1, and selects a combination of a pair of gears that transmits power downstream via a shift member (not shown). The speed change ratio (reduction ratio) is changed by switching operation automatically.

  Incidentally, the sub-transmission device transmits low speed power to the crawler type traveling device 1 for switching to a high speed state for transmitting high speed power to the crawler type traveling device 1 for traveling on the road and the like, and for work traveling on the field. Switching to a low speed state, switching to a neutral state in which power transmission to each crawler type traveling device 1 is interrupted, transmitting normal power to one side of the left and right crawler type traveling devices 1, and reverse power to the other side The above-described shift member performs switching to a spin turning state in which the aircraft is turned right and left on the spot.

  In addition to this, the auger exhaust spiral described above is also rotationally driven by engine power.

  In this manner, a plurality of work machines such as the pretreatment unit 7, the threshing feed chain, and the threshing side work machine unit are driven by the engine power, but are contained in the exhaust gas discharged from the engine 11. Harmful fine solids such as DPF (registered trademark) are removed by a trapping filter 14.

  The exhaust gas introduced from the engine 11 to the capture filter 14 side through the introduction pipe 16 is discharged outside the apparatus through the exhaust pipe 17 after the fine solid matter is removed by the capture filter 14. Since the trapping filter 14 is configured to trap minute solids from the exhaust gas that passes through, the trapped fine solids and the like adhere to the surface as deposits and accumulate with time. . When the amount of deposits increases, the air permeability deteriorates and clogging occurs, the filter function of the trapping filter 14 decreases, and the pressure difference between the inside of the introduction pipe 16 and the inside of the exhaust pipe 17 increases. Various problems may occur.

  For this reason, this combine is provided with a regenerating means for regenerating the filter function by removing the adhering matter adhering to the capture filter 14 by heating. This regeneration means is constituted by an engine control microcomputer 18 (see FIG. 4) called an ECU capable of controlling the engine speed and the engine 11 itself.

  The engine control microcomputer 18 is connected to a main microcomputer (control unit) 19 (see FIG. 4) through a serial connection, a CAN (Controller Area Network) connection, or the like so as to be able to communicate with each other. The engine 11 is controlled via the engine control microcomputer 18 so that the number is substantially constant (stable) in a high state, and the temperature of the exhaust gas is raised. The surface is heated to remove the deposits.

  The microcomputer 19 performs regeneration control for stably and efficiently performing the filter function regeneration of the capture filter 14 via the regeneration means. In this regeneration control, the regeneration means performs manual regeneration control for starting regeneration of the capture filter 14 by the regeneration means and at least one condition that the capture filter 14 is clogged due to manual operation of the operator. Two types of automatic regeneration control that automatically starts regeneration of the capture filter 14 are prepared.

  In addition, it is comprised so that drive control of the above-mentioned working machine of 1 or several (the example shown in figure) driven with engine motive power may also be performed. The engine speed may be controlled by the main microcomputer 19 without providing the engine control microcomputer 18, and in this case, the microcomputer 19 and the engine 11 constitute a reproducing means.

  FIG. 2 is a plan view showing the configuration of the control unit. In addition to the seat 12 with the backrest described above, the control unit 3 includes a front operation panel 21 installed in front of the seat 12, a side operation panel 22 installed on the side (more specifically, on the left side), A floor step 23 is provided between the seat 12 and the front operation panel 21 in a plan view and serves as a floor surface.

  A multi-lever 26, which is a lever operation tool that functions as a lifting operation tool and a steering operation tool of the preprocessing unit 7, is mounted and supported on the right portion of the front operation panel 21 so as to be able to swing back and forth and swing left and right. Yes. The multi-lever 26 performs a lifting operation of the preprocessing unit 7 by swinging back and forth, and a steering operation (turning operation) of the machine body by swinging left and right.

  The side operation panel 22 includes a main transmission lever 27 that is a main transmission operation tool that performs a traveling transmission operation via the traveling HST, and a sub-transmission lever that is a sub-transmission operation tool that performs a traveling transmission device via the auxiliary transmission. 28 and a power clutch switch (intermittent operation means) 29 which is an intermittent operation tool for performing the intermittent operation of the above-described threshing clutch and reaping clutch.

  The main transmission lever 27 has a grip formed at a tip portion protruding upward from the side operation panel 22, and its base end portion changes the inclination of the swash plate of the traveling HST, thereby making the traveling HST stepless. Are mechanically connected to a trunnion shaft (not shown) which is an operation shaft for shifting operation at the right and left ends (right side in the illustrated example) at the neutral position which is the front-rear neutral position of the main transmission lever 27. Swaying forward makes it possible to sway forward, while swaying to the left and right other ends at the neutral position makes it possible to sway backward.

  As the amount of forward swing from the neutral position increases, the travel HST is accelerated toward the aircraft forward travel side. On the other hand, as the amount of backward swing from the neutral position increases, the travel HST is accelerated toward the aircraft backward travel side. The That is, the main transmission lever 27 is configured to perform a stepless shifting operation by swinging back and forth and to perform a forward / reverse switching operation by swinging left and right at the neutral position.

  FIG. 3 is a plan view showing the configuration of the auxiliary transmission lever. The auxiliary transmission lever 28 has a grip 28a formed at a tip portion protruding upward from the side operation panel 22, and a base end portion thereof is mechanically connected to the above-described shift member of the auxiliary transmission device. By swinging the auxiliary transmission lever 28 back and forth, a traveling transmission operation is performed via the auxiliary transmission.

  Specifically, the front / rear neutral position of the sub transmission lever 28 is a neutral position N where the sub transmission is switched to the neutral state, and the rear swing position of the sub transmission lever 28 is the low speed position L where the sub transmission is switched to the low speed state. Thus, the forward swing position of the sub-transmission lever 28 becomes a high-speed position H at which the sub-transmission device is switched to a high-speed state, and the left and right side (left side in the illustrated example) end of the sub-transmission lever 28 from the low-speed position L side. Is the turning position S at which the auxiliary transmission is switched to the spin turning state.

  In addition, the sub-shift lever 28 is configured to be swingable in the left-right direction at the neutral position N. By this left-right swing operation, the sub-shift lever 28 at the neutral position moves to the low speed position L or the high speed position H. Can be swung to either the normal position N1 where the forward / backward swing is allowed or the reproduction position N2 where the forward / backward swing is not allowed. Incidentally, the middle part of the auxiliary transmission lever 28 is inserted into a guide hole 22a formed in the side operation panel 22, and the guide hole 22a is formed in a shape along the swinging locus of the auxiliary transmission lever 28. It becomes a swing guide for the auxiliary transmission lever 28.

  A manual regeneration switch (manual regeneration operation detecting means) 31 for detecting a lateral swing operation from the normal position N1 to the regeneration position N2 at the neutral position N of the subtransmission lever 28 is provided on the base end side of the subtransmission lever 28. 4). When the microcomputer 19 detects a swing operation (manual regeneration operation) in the left-right direction from the normal position N1 to the regeneration position N2 at the neutral position N of the auxiliary transmission lever 28 by the manual regeneration switch 31, the microcomputer 19 described above under a predetermined condition. Execute manual regeneration control.

  As shown in FIG. 2, the power clutch switch 29 is a seesaw switch that can be operated to push the left and right ends separately, and is a momentary switch that is biased to the neutral side. The operation of pushing the end portion is a drive side operation, and the operation of pushing the left and right other end portions is a stop side operation. How the microcomputer 19 intermittently controls the mowing clutch and the threshing clutch based on the drive side operation and the stop side operation will be described later.

  The floor step 23 is formed at a position lower than any of the seat 12, the front operation panel 21, and the side operation panel 22.

  FIG. 4 is a block diagram of a microcomputer mounted on the combine. The microcomputer 19 is connected to the above-described engine control microcomputer 18 and a regeneration prohibiting switch (reproduction restricting operation tool) 32 so that bidirectional communication is possible.

  The regeneration prohibiting switch 32 is a switch that restricts (specifically prohibits) the above-described automatic regeneration control. The automatic regeneration control is prohibited while the switch is in the ON state, and the automatic regeneration control is disabled when the switch is in the OFF state. The ban is lifted. It is also possible to switch the regeneration prohibiting switch 32 on and off from the microcomputer 19 side.

  Incidentally, the regeneration prohibiting switch 32 is used as a momentary switch, and the microcomputer 19 is configured to switch between the automatic regeneration prohibiting state (restricted state) and the deregulating state for each pressing operation. Even in a state where the operation signal of 32 is not inputted, one of the two states may be switched to the other, or the other may be switched to one.

  Further, on the input side of the microcomputer 19, in addition to the manual regeneration switch 31 and the power clutch switch 29 described above, a pressure difference between the upstream side (inside the introduction pipe 16) and the downstream side (in the exhaust pipe 17) of the capture filter 14 is set. A pressure sensor 33 to detect, a monitoring camera (information acquisition means, camera, obstacle detection means) 34 to capture (acquire) an image (information) on the side where exhaust gas from the engine 11 is exhausted, and a main transmission lever 27 The main transmission lever potentiometer 36 for detecting the operation position is connected.

  The pressure sensors 33 are respectively installed on the upstream side and the downstream side of the capture filter 14, and detect the clogging degree (accumulated amount of deposits) of the capture filter 14 by detecting the pressure difference. That is, the pressure sensor 33 serves as a clogging detection unit that detects clogging of the capture filter 14.

  The monitoring camera 34 shoots the exhaust gas exhaust side (exhaust gas flow side) from the front end (rear end) of the exhaust pipe 17 with a still image or a moving image, and the rear end of the traveling machine body 6. A range that is obliquely downward and rearward from the lower end portion is set as a monitoring range D of the monitoring camera 34.

  The main transmission lever potentiometer 36 can detect the shift state of the traveling HST by detecting the swing operation position of the main transmission lever 27, so that the traveling for detecting whether or not the combine (traveling machine body 6) is traveling is performed. In addition to detecting means, it also serves as vehicle speed detecting means for detecting the traveling speed (vehicle speed) of the combine.

  On the other hand, on the output side of the microcomputer 19, there is no monitor 37, a notification means 38 such as a buzzer, a speaker or a lamp for notifying the operator in the control unit 3 and the surrounding people by sound or light, and a transport HST. A transport HST control motor 39 that operates in a step-shift manner and a threshing / cutting clutch motor 41 that is an intermittent means for intermittently connecting the chopping clutch and the threshing clutch are connected to each other.

  The monitor 37 is installed in a place (for example, the front operation panel 21 or the like) that can be viewed from an operator of the control unit 3 (more specifically, an operator seated on the seat 12). Is displayed (output).

  The transport HST control motor 39 is configured to rotationally drive a trunnion shaft that is an operation shaft for changing the tilt of the swash plate of the transport HST. When the tilt of the swash plate is changed by the power of the transport HST control motor 39, The transport HST performs a speed change operation in a stepless manner.

  The microcomputer 19 is configured to perform vehicle speed interlocking control in which the threshing feed chain controlled via the transport HST and the driving speed of the preprocessing unit 7 are interlocked with the vehicle speed detected by the main transmission lever potentiometer 36. Specifically, when the combine stops traveling, the transport HST is set to neutral to stop the driving of the threshing feed chain and the preprocessing unit 7, while the threshing feed chain and the preprocessing unit are accompanied with an increase in speed during the forward traveling of the combine. 7 is increased proportionally, and the driving speed of the threshing feed chain and the pre-processing unit 7 is decreased proportionally with deceleration during forward traveling.

  The microcomputer 19 also includes a cutting mode in which both the cutting clutch and the threshing clutch are in a disconnected state, a handling mode in which the cutting clutch is in a disconnected state while the threshing clutch is in a connected state, and both the cutting clutch and the threshing clutch. There are connection modes to be connected, and these modes are switched by driving side operation and stop side operation of the power clutch switch 34.

  Specifically, the microcomputer 19 shifts to the handling mode when the driving side operation is detected in the cutting mode, and shifts to the connection mode when the driving side operation is detected in the handling mode. When the stop side operation is detected in the mode, the mode is shifted to the disconnect mode, and when the stop side operation is detected in the connection mode, the mode is shifted to the handling mode. Incidentally, in the connection mode, as a general rule, the microcomputer 19 is configured so that the vehicle speed interlocking control described above is performed.

  Further, when the microcomputer 19 detects an operation by the manual regeneration switch 31, if the predetermined condition is satisfied, the microcomputer 19 starts executing the manual regeneration control. In this example, the predetermined predetermined condition is that the first condition is that the vehicle is parked, and the main transmission lever potentiometer 36 detects that the main transmission lever 27 is being swung to the neutral position. The third condition is that the opening degree of the accelerator operation obtained from the engine control microcomputer 18 is confirmed to be 0%, and the disengagement state (disconnection mode) of the threshing clutch is confirmed. When this is the fourth condition, it means that all of the first to fourth conditions are satisfied, but this is only an example.

  When the manual regeneration control is started, the operation of the engine 11 is controlled via the engine control microcomputer 18 so that the exhaust gas exhausted from the engine 11 becomes high temperature. Run for hours. During the execution of the manual regeneration control, the transition to the connection mode and the transition to the handling mode via the power clutch switch 29 are restricted (prohibited).

  In other words, when the threshing clutch is in a disconnected state, the microcomputer 19 is configured so as to be one condition for executing the manual regeneration control, and when the threshing clutch is in a connected state, manual regeneration is performed. When it is detected that the operation has been performed, the microcomputer 19 is configured to wait for the threshing clutch to be in a disconnected state and to start execution of the manual regeneration control.

  On the other hand, the microcomputer 19 also performs the automatic regeneration control described above.

  FIG. 5 is a flowchart showing a processing procedure for executing automatic regeneration control. When the process is started, the microcomputer 19 proceeds to step S1. In step S1, whether or not the capture filter 14 is clogged is confirmed by the pressure sensor 33. If clogging does not occur, the process of step S1 is repeated again. If clogging occurs, step S2 is performed. Proceed to

  In step S2, the vehicle speed is confirmed by the main transmission lever potentiometer 36. If the vehicle speed is equal to or less than a predetermined value, the process proceeds to step S3. In step S3, the regeneration prohibition switch 32 is switched to the ON state (restricted state), and unless the regeneration prohibition switch 32 is switched to the restriction release state, the automatic regeneration control is not performed, and step S4 is performed. Proceed to

  That is, when the vehicle speed is low, if automatic regeneration control is executed unintentionally, high-temperature exhaust gas is exhausted to the same location, and if there are obstacles etc. in that portion, it may cause a fire, etc. Such processing is executed. For this reason, the predetermined value is set to a value indicating that the vehicle body is stopped or substantially stopped.

  In step S4, notification is performed via the notification unit 38, and the process proceeds to step S5. This notification allows the operator and those around to take into consideration that there is a concern and perform an appropriate operation or work after confirming the surroundings.

  In step S5, the captured image of the monitoring camera 34 is displayed on the monitor 37, and the operator confirms (acquires) the state of the exhaust gas on the exhaust side, and the process proceeds to step S6.

  The output to the monitor 37 is such that the operator confirms the state of the monitoring range D, which is the region where the exhaust gas is exhausted, and when the automatic regeneration control may be executed, by operating the regeneration prohibiting switch 32, While switching to the restriction release state is performed, otherwise, the operation is not performed, and the execution of the automatic regeneration control is prohibited.

  Incidentally, when the process proceeds from step S 1 → step S 2 → step S 3 → step S 4 → step S 5, the image is output to the monitor 37 and the captured image in the monitoring range D is not always displayed to the operator or the like. Since the monitoring image is not displayed excessively and is automatically displayed, the operation load is reduced, and the vehicle speed is sufficiently low by the processing from step S2 to step S3, so the operator confirms the image. However, it does not interfere with safety when driving.

  Due to the above intention, in step S6, it is confirmed whether or not a switching operation to the restriction release state by the regeneration prohibiting switch 32 has been performed. If it is detected that the switching operation has been performed, the process proceeds to step S7. If it is not detected, the process of step S6 is repeated again.

  In step S7, the image captured by the monitoring camera 34 is analyzed to check whether there is an obstacle on the exhaust gas exhaust side (specifically, the monitoring range D). If the exhaust side is in a good state when the capture filter 14 is regenerated, the process proceeds to step S8. On the other hand, if there is an obstacle (the regeneration side of the capture filter 14 is not good) If YES, the process proceeds to step S9.

  In step S8, execution of automatic regeneration control is started, and after the process is completed, the process returns to step S1. Incidentally, the regeneration of the trapping filter 14 at the time of execution of this automatic regeneration control is almost the same as the regeneration at the time of execution of the manual regeneration control, and the deposits are burned by high-temperature exhaust gas.

  In step S9, since the exhaust side is in an unfavorable state when the capture filter 14 is regenerated, the notification unit 38 notifies the user with the intention of warning, and the process returns to step S6 for the purpose of prompting confirmation again. .

  In addition, when the vehicle speed exceeds the above-described predetermined value, the possibility that hot exhaust gas is continuously exhausted to the same location is reduced, and information on the exhaust side (monitoring range D) of the exhaust gas is acquired. Since the necessity is reduced, if it is confirmed in step S2 that the vehicle speed exceeds the predetermined value and the vehicle speed is high, the process proceeds to step S8, and the execution of the automatic regeneration control is started as it is.

  According to the combine configured as described above, automatic regeneration control is executed at an appropriate timing, and the merit is great.

  Further, the information of the captured image on the exhaust side of the exhaust gas acquired by the monitoring camera 34 is automatically detected by the warning and confirmation to the operator and the like by the process of step S3 → step S4 → step S5 → step S6 and the process of step S7 It is used both for determining whether or not the execution of regeneration control should be restricted, and this double confirmation prompts execution of automatic regeneration control at a more appropriate timing.

  Either one of the two may be omitted. Specifically, the process of step S3 → step S4 → step S5 → step S6 or the process of step S7 and step S9 is omitted. In the former case, the process from step S2 to step S3 is changed to the process from step S2 to step S7. In the latter case, the process from step S6 to step S7 is changed to the process from step S6 to step S8. Changed to

  In step S7, when it is confirmed that the exhaust side is not good when the capture filter 14 is regenerated, execution of automatic regeneration control is prohibited instead of or in addition to the notification by the notification means 38. Such a process (for example, a process of switching to a restricted state) may be performed.

  Further, in addition to or instead of the monitoring camera 34, one or both of an ultrasonic sensor (obstacle detection means) 42 and a temperature sensor (obstacle detection means) 42 may be provided on the input side of the microcomputer 19. The ultrasonic sensor 42 and the temperature sensor 43 are also installed at the same or substantially the same location as the monitoring camera 34, and the monitoring range D is also the same or substantially the same.

  According to the ultrasonic sensor 42, since an object such as an obstacle existing in the monitoring range D can be detected, whether or not the exhaust side is in a good state when the exhaust filter 14 is regenerated in step S7. It is possible to use it for the judgment.

  The temperature sensor 42 is a non-contact type and can also be used for thermography. According to this, an object such as an obstacle existing in the monitoring range D is detected, or a fire is detected in the monitoring range D. It is also possible to check the risk of fire. For this reason, it is possible to output a thermographic image to the monitor 37 in step S5, or to determine whether or not the exhaust side is in a good state when the exhaust filter is regenerated in step S7. is there.

  Furthermore, a rotation sensor or the like that detects the rotation of a drive shaft that directly drives the crawler type traveling device 1 may be used as the vehicle speed detection means.

  Further, the monitor 37 may be used as a notification means, and in this case, more detailed character information or the like can be shown to the operator. In this case, unlike the past, the acquired state is directly notified to the operator or the like. Incidentally, the above-mentioned notification means 38 indirectly notifies the operator with a buzzer sound, a light or the like in relation to the acquired information.

  Next, another embodiment will be described with reference to FIG.

  FIG. 6 is a process flow diagram for executing automatic regeneration control according to another embodiment.

  In this example, if automatic regeneration control is executed when switching to the handling mode with the vehicle stopped, there is a risk of fire due to sawdust or the like, which is prohibited.

  When the processing is started, the microcomputer 19 proceeds to step S11. In step S11, it is confirmed whether or not the capture filter 14 is clogged by the pressure sensor 33. If clogging does not occur, the process of step S1 is repeated again. If clogging occurs, step S12 is performed. Proceed to

  In step S12, the intermittent state of the threshing clutch is confirmed from the operation of the power clutch 29 or the history of the operation state. If the threshing clutch is connected, the process proceeds to step S13. In step S13, if the vehicle speed is confirmed by the main transmission lever potentiometer 36 and it is confirmed that the vehicle speed is equal to or less than the above-described treatment value (the vehicle body is stopped or substantially stopped), the process proceeds to step S14.

  In step S14, it is determined that the vehicle body is in a stopped or substantially stopped state in the handling mode, and the notification means 38 or the like is used to notify the operator or the like that it is not preferable as an environment for executing the automatic regeneration control. Is notified, and the process returns to step S11. In the process of step S14, a process for prohibiting or restricting the subsequent automatic regeneration control may be executed.

  If it is detected in step S12 that the threshing clutch is disconnected, or if it is detected in step S13 that the vehicle speed is equal to or higher than the predetermined value, the process proceeds to step S15. In step S15, it is determined that the mode is not the handling mode, the execution of the automatic regeneration control is started, and when it is finished, the process is returned to step S11.

11 Engine 14 Acquisition filter (DPF)
19 Microcomputer (control unit)
33 Pressure sensor (clogging detection means)
34 Surveillance camera (information acquisition means, camera, obstacle detection means)
37 Monitor 38 Notification means 42 Ultrasonic sensor (information acquisition means, obstacle detection means)
43 Temperature sensor (information acquisition means, obstacle detection means)

Claims (3)

A capture filter (14) for capturing fine solids contained in exhaust gas exhausted from the engine (11);
Clogging detection means (33) for detecting clogging of the capture filter (14);
A regeneration means for heating and removing the fine solid matter captured by the capture filter (14);
Information acquisition means for acquiring information on the exhaust gas exhaust side;
Automatic that automatically regenerates the capture filter (14) via the regeneration means on the condition that the clogging detection means (33) detects that the capture filter (14) is clogged. A control unit (19) for executing reproduction control,
When it is detected by the clogging detection means (33) that the capture filter (14) is clogged, the control section (19) uses the information acquired by the information acquisition means indirectly or directly. A work vehicle that determines whether or not to restrict execution of automatic regeneration control based on the acquired information. The information acquisition means is a camera (34) for taking an image of the exhaust gas exhaust side;
A monitor (37) for displaying an image taken by the camera (34) to an operator;
The control unit (19) takes an image taken by the camera (34) on the basis of at least one condition that the clogging detection means (33) detects that the capture filter (14) is clogged. The work vehicle according to claim 1, wherein the work vehicle is displayed on a monitor (37). The information acquisition means is an obstacle detection means (34, 42, 43) for detecting an obstacle on the exhaust gas exhaust side;
When the controller (19) detects that the capture filter (14) is clogged by the clogging detection means (33), the obstacle detection means (34, 42, 43) When the presence of an obstacle on the exhaust side is also detected, the execution of the automatic regeneration control is restricted, or the notification by the notification means (38) that notifies the operator is executed. The work vehicle according to claim 1 or 2.

Images