JP7316950B2 - work vehicle - Google Patents

Description

TECHNICAL FIELD The present invention relates to a work vehicle that regenerates a trapping filter that traps fine solids contained in exhaust gas.

An engine that discharges exhaust gas, a trapping filter, engine control means that controls the engine so that the exhaust gas from the engine heats and removes deposits adhering to the trapping filter, and whether or not the aircraft is running. and a control unit for executing regeneration control for regenerating the filter function by removing deposits on the trapping filter by means of the engine control means, wherein the control unit detects when the traveling of the aircraft is stopped by the travel detection means. A work vehicle that executes regeneration control on the condition that it is detected is known (see, for example, Patent Document 1).

According to such a work vehicle, it is possible to stably regenerate the supplementary filter while the machine body is stopped. On the other hand, since the engine is driven while the regeneration control is being executed, there is a problem that people around the aircraft cannot understand whether the engine has been forgotten to be turned off or the regeneration control is being executed.

Japanese Patent No. 5541940

In the present invention, when regenerating a trapping filter that traps fine solid matter contained in exhaust gas while the vehicle is stopped, it is necessary to check whether a person in the vicinity of the aircraft has forgotten to turn off the engine, or to perform regeneration control. To provide a work vehicle which can easily understand whether a work is being executed.

In order to solve the above problems, there is provided a work vehicle that regenerates a trapping filter that traps fine solids contained in exhaust gas, comprising: an engine that emits exhaust gas; the trapping filter; engine control means for controlling the engine so as to heat and remove deposits with exhaust gas from the engine; running detection means for detecting whether or not the aircraft is running; and ambient notification means for notifying the surroundings of the aircraft. and manual regeneration operation means, and a control unit for executing regeneration control for removing deposits on the trapping filter and regenerating the filter function by the engine control means, wherein the control unit is controlled by the manual regeneration operation means. When the regeneration control is executed under at least one condition that an operation is detected, and when the regeneration control is being executed and the running detection means detects that the vehicle is stopped, It is characterized in that it is configured to execute a reproduction notification process for performing notification by the surrounding notification means.

Abnormality notification means may be provided, and the control section may be configured to perform notification by the abnormality notification means when the reproduction control is abnormally terminated.

A cool-down notification means is provided, and the control unit uses the cool-down notification means to notify the engine to cool down until a predetermined time elapses after the execution of the regeneration control is normally completed. may be configured to perform

According to the configuration of the present invention, when regeneration of the trapping filter that traps fine solid matter contained in the exhaust gas is performed while the vehicle is stopped, it is possible for a person around the aircraft to forget to turn off the engine. , or whether playback control is being executed.

Abnormality notifying means is provided, and the control unit is configured to notify by the abnormality notifying means when the regeneration control is abnormally terminated, thereby facilitating notification that the regeneration control is not normally terminated. It becomes possible to know

A cool-down notification means is provided, and the control unit uses the cool-down notification means to notify the engine to cool down until a predetermined time elapses after the execution of the regeneration control is normally completed. immediately after the end of the regeneration control that applies a relatively high load to the engine, the exhaust gas caused by continuously performing the work to put the engine in a high load state. Problems such as an excessive temperature rise and overloading of the engine can be efficiently prevented. In addition, if the engine is stopped without cooling down, the surrounding temperature rises without being cooled by an air cooling fan, etc., which may cause damage to various electrical components. can be effectively prevented.

1 is a left side view of a self-contained combine harvester to which the present invention is applied; FIG. 1 is a right side view of a self-contained combine harvester to which the present invention is applied; FIG. 1 is a plan view of a self-contained combine harvester to which the present invention is applied; FIG. 1 is a rear view of a self-contained combine harvester to which the present invention is applied; FIG. FIG. 4 is a plan view showing the configuration of the control section; 3 is a block diagram showing the configuration of a control unit; FIG. FIG. 4 is a flowchart showing a procedure of manual regeneration execution control, which is control for executing manual regeneration control. It is a flowchart which shows the processing content of well-known alerting|reporting control.

1 to 4 are a left side view, a right side view, a plan view and a rear view of a self-contained combine harvester to which the present invention is applied. A combine harvester, which is a type of work vehicle, includes a traveling machine body (machine body) 2 having a pair of left and right traveling parts 1L and 1R composed of a crawler type traveling device, and a preprocessing part supported on the front part of the traveling machine body 2 so as to be able to be raised and lowered. 3.

The preprocessing unit 3 is configured to reap grain stalks such as rice and wheat in a field while the traveling machine body 2 is traveling forward, and to convey the harvested stalks backward toward the traveling machine body 2 . ing.

The traveling machine body 2 has a threshing device 4 arranged on the left (hereinafter simply "left") half in the traveling direction, and a threshing device 4 arranged on the right (hereinafter simply "right") half in the traveling direction. It has a grain tank 6 and a control section 7 arranged right in front of the grain tank 6 and diagonally forward right of the threshing device 4 .

The threshing device 4 is provided with a feed chain 8 for receiving the culms conveyed from the pretreatment section 3 and conveying them rearward. The culms whose base side is held by the feed chain 8 are conveyed rearward with the tip side inserted into the inside of the threshing device 4 . In this rearward transportation process, the culms are threshed by a threshing cylinder (not shown) that is rotationally driven inside the threshing device 4 to become discharged straw. The discharged straw is discharged as it is or after being cut and discharged from the rear end side of the traveling machine body 2 to the outside of the machine.

The processed materials separated from the culms by this threshing process are sorted into grains such as rice grains and discharged materials such as straw scraps in a sorting chamber arranged directly below the threshing cylinder inside the threshing device 4. being classified. The grains are transported and stored inside the grain tank 6 . The discharged straw is discharged out of the machine from the rear end portion of the traveling machine body 2. - 特許庁

The grains in the grain tank 6 are discharged to the outside of the traveling machine body 2 by the auger 9 . The auger 9 has a vertical tube 11 extending upward from the rear end of the traveling body 2 and a discharge tube 12 whose base end is connected to the upper end of the vertical tube 11 . The vertical tube 11 is supported by the traveling body 2 so as to be rotatable about its axis. The discharge tube 12 is supported by the vertical tube 12 so as to be vertically swingable with the base end side as a fulcrum. A discharge port 12a for discharging the grains downward is formed at the tip of the discharge cylinder 12, which is the end on the far side from the vertical cylinder 11. As shown in FIG. The auger 9 is turned left and right by the rotation of the vertical cylinder 11 in the axial direction, and is raised and lowered by the vertical swing of the discharge cylinder 12, and the ejection position and height of the grains are adjusted by this left and right rotation and elevation. .

This combine is provided with a plurality of lamps 13L, 13R, 14L, 14R, 16L, 16R which function as ambient notification means for notifying surrounding people by lighting or blinking and also function as winkers. Specifically, a pair of left and right lamps 13L and 13R arranged on the front side, a pair of left and right lamps 14L and 14R arranged in the front and rear halfway portions of the side portions, a pair of left and right lamps 16L arranged on the rear side, 16R are provided.

More specifically, the front left lamp 13L is a left front blinker arranged on the left side of the preprocessing unit 3. As shown in FIG. The front right lamp 13R is a right front blinker arranged on the right side of the front cover 17 that covers the front of the control unit 7. As shown in FIG.

The lamp 14L on the left halfway in the front-rear direction is a left center turn signal that is arranged on the left side of the top plate 18 of the threshing device 4 of the traveling body 2 . The right lamp 14R in the middle of the front and rear is a right center winker arranged on the right side of the traveling body 2. As shown in FIG. The right center winker 14R is laterally adjacent to an engine cover 19 that is formed on the right side of the traveling body 2 and covers the right side of an engine room that houses the engine.

The left and right lamps 16L and 16R on the rear side are a left rear winker arranged on the left side of the rear end portion of the upper surface of the traveling body 3 and a right rear winker arranged on the right side.

In this combine harvester, the exhaust gas discharged from the engine is discharged rearward from the rear end portion of the traveling machine body 2 or discharged from the rear position of the control section 7 of the traveling machine body 2 upward or rearward obliquely upward. This exhaust gas contains particulates (fine solids) such as soot. A DPF (registered trademark), which is a trapping filter for removing the particulates from the exhaust gas, is provided in the middle of the exhaust gas discharge path.

The DPF has a case and a filter body provided inside the case. Exhaust gas is introduced into the case and discharged out of the case in a clean state as particulates are captured by the filter body. When a large amount of particulates and other substances adhere to the filter body, clogging occurs, causing various problems including deterioration of the supplementary function.

For this reason, the present combine is provided with engine control means for controlling the engine such that the DPF (specifically, the filter body) is heated by the exhaust gas from the engine and removed. there is Specifically, an engine control microcomputer 21 (see FIG. 6) that precisely controls various operations of the engine constitutes engine control means. The engine control microcomputer 21 performs regeneration control for discharging high-temperature exhaust gas and burning deposits adhering to the filter body of the DPF.

Incidentally, in this combine harvester, the regeneration control includes automatic regeneration control that is automatically executed when automatic regeneration conditions that are predetermined conditions are satisfied, and manual regeneration that is predetermined conditions. Three types of regeneration control are provided: manual regeneration control that is manually executed when conditions are satisfied, and special regeneration control that is permitted to be executed only in special cases such as diagnosis of the combine.

FIG. 5 is a plan view showing the configuration of the control section. The control unit 7 is formed at a low position between a seat 22 on which an operator sits, a front operation panel 23 arranged in front of the operator seated on the seat 22, and between the seat 22 and the front operation panel 23. A floor step 24 and a side operation panel 26 arranged on the side of an operator seated on the seat 22 are included.

The front operation panel 23 is provided with a multi-lever 27 which is a steering operation tool and a lifting operation tool, and a display panel 28 for displaying various information. The multi-lever 27 performs steering operation of the traveling body 2 by swinging left and right, and raises and lowers the preprocessing unit 3 by swinging back and forth. The display panel 28 includes a speed meter 28a that indicates the traveling speed of the traveling body 2, and a DPF indicator lamp 28b that is notification means for notifying the state of the DPF.

The side operation panel 26 includes a main shift lever 29 which is a shift operation tool for performing a travel shift operation, a DPF manual regeneration switch (manual regeneration operation means) 31 for manual operation for executing the manual regeneration control, and a DPF. A notification execution switch 32, which is a switching operation tool for switching whether to notify that manual regeneration control is being performed, an engine rotation dial 33 for changing and adjusting the engine speed, and a cutting/depower clutch. A switch 34 is provided.

The DPF manual regeneration switch 31 is a momentary ON/OFF switch whose pressing operation turns ON operation, and is always elastically biased to the pressing operation release (OFF operation) side.

The notification execution switch 32 is a push-button operation tool that can be turned on and off.

The engine rotation dial 33 performs an ON/OFF operation of automatic rotation speed control for automatically controlling the rotation speed of the engine, and performs a manual setting operation of the engine rotation speed when the automatic rotation speed control is OFF.

The threshing clutch and the reaping clutch switch 34 are operated to switch between a stop state in which the threshing clutch and the reaping clutch are disconnected, a threshing state in which the threshing clutch is connected and the reaping clutch is disconnected, and a threshing clutch and the reaping clutch are connected. Switching to one of three states is performed with the reaping state to be done.

The cutting/off-power clutch switch 34 has a stop-side posture in which it is inclined downward in one longitudinal direction, a drive-side posture in which it is inclined downward in the other longitudinal direction, and a position along the surface of the side operation panel 26 . It is a momentary switch that can be switched to a neutral position that is horizontal or substantially horizontal, and that is elastically biased to the neutral position.

In the stopped state, when the operation of switching the reaping/off-power clutch switch 34 in the neutral posture to the driving side posture is performed once, the switching from the stopped state to the threshing state is executed. In the threshing state, when the operation of switching the reaping/depower clutch switch 34 from the neutral posture to the driving side posture is performed once, the threshing state is switched to the reaping state. In the reaping state, when the operation of switching the reaping/depower clutch switch 34 in the neutral posture to the stop side posture is performed once, the reaping state is switched to the threshing state. In the threshing state, when the operation of switching the reaping/depower clutch switch 34 in the neutral posture to the stop side posture is performed once, the switching from the threshing state to the stop state is executed.

On the other hand, an operation to switch the reaping/de-powered clutch switch 34, which has been switched to the neutral posture during the stop state, to the stop side posture or an operation to switch the reaping/de-powered clutch switch 34, which has been switched to the neutral posture during the reaping state, to the drive side posture. If so, the state is maintained without switching as described above.

By the way, when the cutting/off-power clutch switch 34 in the neutral posture is operated against the elastic force to switch to the drive side posture or the stop side posture as described above, and then the operation is released, the elastic force , the cutting/power-off clutch switch 34 naturally returns to the neutral position.

The threshing clutch interrupts power transmission from the engine to the threshing device 4 . The reaping clutch interrupts power transmission from the threshing clutch to the pretreatment unit 3 . Therefore, in the stopped state, the pre-processing unit 3 and the threshing device 4 are stopped, and in the threshing state, the pre-processing unit 3 is stopped and the threshing device 4 is driven. The pretreatment unit 3 and the threshing device 4 are driven. In other words, the reaping/removing power clutch switch 34 functions as reaping drive detection means for detecting whether or not the preprocessing unit 3 is driven, and functions as threshing drive detection means for detecting whether or not the threshing device 4 is driven. .

By the way, this combine has a control section 36 (see FIG. 6) which is a main microcomputer connected to the engine control microcomputer 21 via a network such as CAN so as to be capable of inputting and outputting. The control unit 36 is configured to be capable of executing the automatic regeneration control, the manual regeneration control, and the special regeneration control. Further, the control unit 36 is configured to be able to switch the above-described state by the cutting/off power clutch switch 34 .

FIG. 6 is a block diagram showing the configuration of the control section. As described above, the control unit 36 and the engine control microcomputer 21 can communicate with each other. Note that the DPF pressure sensor 37 may be directly connected to the input side of the control section 36 .

Further, on the input side of the control unit 36, there is a main transmission which is running detection means for detecting whether or not the running body 2 is running and the running speed by detecting the operation position of the engine rotation dial 33 and the main transmission lever 29. The lever potentiometer 38, the cutting/de-power clutch switch 34, the DPF manual regeneration switch 31, the notification execution switch 32, and the left and right winkers 13L, 13R, 14L, 14R, 16L, 16R are operated to indicate directions. A winker switch 39, which is a direction indicator detection means for detecting the operation of a direction indicator (not shown), is connected.

The DPF pressure sensor 37 detects the pressure difference between the introduction side and the discharge side of the exhaust gas of the DPF, or detects the pressure on the introduction side to detect the state of the DPF (specifically, the state of the filter attached to the main body of the filter). A state detection means for detecting the amount of deposits deposited on the surface.

The state of the DPF is classified into a plurality of stages according to the amount of deposits deposited. Specifically, a state in which the deposit amount of deposits on the filter body is 0 or a minimum is defined as a regeneration unnecessary state (level 0) in which regeneration control is unnecessary. A state in which the amount of deposits deposited on the filter body is greater than the regeneration not required state is defined as an automatic regeneration required state (level 1) in which the deposits should be removed by executing automatic regeneration control. A state in which the amount of deposits deposited on the filter body is greater than the automatic regeneration required state is a state in which the deposits can be removed by executing either automatic regeneration control or manual regeneration control. Defined as both playable state (level 2).

A state in which the amount of deposits deposited on the filter body is greater than both regeneration possible states is defined as a manual regeneration required state (level 3), which is a state in which the deposits should be removed by executing manual regeneration control. there is A state in which the amount of deposits deposited on the filter body is greater than the manual regeneration required state is defined as a special regeneration required state (level 4), which is a state in which the deposits should be removed by executing special regeneration control. there is As described above, the special regeneration control can be executed only under special conditions such as when diagnosing the combine (especially the control unit 36 or the engine control 21). A state in which the amount of deposits deposited on the filter body is greater than the special regeneration required state is a state in which it is difficult or impossible to remove the deposits by regeneration control and the DPF needs to be replaced. state (level 5).

On the output side of the control unit 36, the DPF indicator lamp 28b, the six lamps 13L, 13R, 14L, 14R, 16L, 16R installed around the traveling machine body 2, and a sound notification are provided around the combine. A buzzer 41, which is a notification means for a person or an operator, and a clutch connecting/disconnecting means 42 composed of an actuator for switching on/off the threshing clutch and the reaping clutch are connected.

The clutch connecting/disconnecting means 42 may be provided for each of the threshing clutch and the reaping clutch, or a single clutch connecting/disconnecting means 42 may individually control the connection/disconnection of the threshing clutch and the reaping clutch. Then, the control unit 36 switches to any one of the stop state, the threshing state, and the harvesting state in accordance with the above-described operation of the reaping/disengagement power clutch switch 34 .

Further, the control unit 36 executes the automatic regeneration control and the manual regeneration control by the engine control microcomputer 21, and the well-known notification control using the lamps 13L, 13R, 14L, 14R, 16L, and 16R which are ambient notification means. It is possible. In addition, the control unit 36 appropriately performs notification by the DPF indicator lamp 28b.

Specifically, the control unit 36 detects that the state of the DPF is level 1 or level 2 by the DPF pressure sensor 37 when the state is switched to the reaping state by the reaping/de-power clutch switch 34. In addition, when the main shift lever potentiometer 38 detects that the combine is running, the automatic regeneration condition is assumed to be met, and automatic regeneration control is executed.

During the execution of the automatic regeneration control, the control unit 36 turns on the DPF indicator lamp 28b to notify that the automatic regeneration control is being executed, and then the DPF pressure sensor 37 detects that the state of the DPF has reached level 0. is detected, the execution of the automatic regeneration control is terminated normally, and the DPF indicator lamp 28b is also turned off.

The control unit 36 terminates the execution of the automatic regeneration control when the reaping/de-power clutch switch 34 switches to a threshing state or a stop state, which is a state other than the reaping state, during execution of the automatic regeneration control. Further, when the main shift lever potentiometer 38 detects that the combine is stopped during the execution of the automatic regeneration control, the control unit 36 controls the control unit 36 to stop the running of the combine for a predetermined time (for example, 30 seconds). After elapses, the execution of the automatic regeneration control is terminated in the middle.

Incidentally, when the DPF pressure sensor 37 detects that the DPF is in the state of level 4 or 5, the control unit 36 causes the DPF indicator lamp 28b to flash and the buzzer 41 to sound intermittently. , the need for regeneration control is notified. At this time, the blinking period of the DPF indicator lamp 28b is set to 0.5 seconds, and the period during which the DPF indicator lamp 28b is lit is set to 0.3 seconds.

Further, when the control unit 36 detects that the state of the DPF is level 3 to 5, the control unit 36 regulates state switching to the threshing state or the harvesting state. Furthermore, when the control unit 36 detects that the DPF state is level 3 to 5 and confirms the threshing state or the reaping state, the control unit 36 turns the reaping/depower clutch switch 34 to the stop side. Only the operation for switching to the posture is accepted, and the operation for switching to the driving posture is canceled.

It is also possible to spontaneously check the state of the DPF. More specifically, while the DPF manual regeneration switch 31 is pressed and the key switch (starter switch) is turned on with the engine stopped, the DPF indicator lamp 28b indicates the state of the DPF. Specifically, when the DPF state is level 0, the DPF indicator lamp 28b flashes once, and when the DPF state is level 1, the DPF indicator lamp 28b flashes twice, and the DPF state is level 2, the DPF indicator lamp 28b flashes three times, and when the DPF status is level 3, the DPF indicator lamp 28b flashes four times, and the DPF status is level 4 or level 5. In this case, the DPF indicator lamp 28b is turned on. The engine does not start when the key switch is turned ON.

FIG. 7 is a flow chart showing a procedure of manual regeneration execution control, which is control for executing manual regeneration control. When the control unit 36 is powered on or the engine is started and the processing is started, the processing shown in the figure is started, and the processing starts from step S1. In step S1, it is checked whether or not the manual regeneration flag, which has been reset to 0 in the initial setting, is 0, and if it is 0, the process proceeds to step S2.

In step S2, the state of the DPF is detected by the DPF pressure sensor 37. If the state of the DPF is level 2 or 3, one of the manual regeneration conditions is assumed to be satisfied, and the process proceeds to step S3. Otherwise, the process returns to step S1. In step S3, the DPF indicator lamp 28b is flashed and the buzzer 41 is sounded to inform the operator that manual regeneration control is necessary, and the process proceeds to step S4.

The DPF indicator lamp 28b is flashed in step S3 when the DPF state is level 2, the cycle is set to 1 second, and the rate at which the DPF indicator lamp 28b is lit during one cycle is 50%. When the state of the DPF is level 3, the cycle is set to 0.5 seconds, and the rate at which the DPF indicator lamp 28b is lit during one cycle is 60%. That is, the notification of the DPF indicator lamp 28b changes the flashing cycle according to the state of the DPF, allowing the operator to identify the state of the DPF.

Further, the notification by the buzzer 41 in step S3 is such that when the DPF state is level 2, the buzzer sounds twice every minute, while when the DPF state is level 3, the buzzer sounds intermittently. This is done by continuously blowing the That is, the notification by the buzzer 41 changes the timing and type of sounding according to the state of the DPF, so that the operator can identify the state of the DPF.

In step S4, the ON/OFF state of the DPF manual regeneration switch 31 is checked. , and at least one of the manual regeneration conditions is satisfied, the process advances to step S5. If the switch is turned off, the process returns to step S1.

Incidentally, in step S5, it is determined whether or not a residual condition, which is a condition other than the above two conditions among the manual regeneration conditions, is satisfied. While proceeding to S6, if the condition is not satisfied, the process returns to step S1.

Incidentally, in this example, in order for the residual condition to be satisfied, the engine rotation dial 33 is used to confirm that the automatic rotation speed control is OFF, and the engine rotation dial 33 is used to rotate the engine at a low speed (specifically, within the entire range). (lowest rpm) and detection of stoppage of the combine by the main gear lever potentiometer.

In step S6, the manual regeneration flag is set to 1 to start execution of manual regeneration control, and the process returns to step S1.

In step S1, when the manual regeneration flag is other than 0, the process proceeds to step S7. In step S7, it is checked whether or not the manual regeneration flag is 1, and if it is 1, the process proceeds to step S8. In step S8, the state of the DPF is confirmed by the DPF pressure sensor 37, and if the state of the DPF is other than level 0, the process proceeds to step S9. In step S9, manual regeneration control is executed, and the process proceeds to step S10. In step S10, the DPF indicator lamp 28b is turned on to inform the operator that the manual regeneration control is being executed, and the process proceeds to step S11. In the subsequent loop processing, steps S7→step S8→step S9→step S10 are executed, so manual regeneration control is started.

Incidentally, when the manual regeneration flag is set to 1 and the execution of the manual regeneration control is started, first, switching to the stop state is performed, and then the temperature of the exhaust gas rises and various cooling waters rise above a predetermined level. After that, in order to regenerate the filter function, a process (removal process) of removing deposits from the filter body with high-temperature exhaust gas is started. This removal process is scheduled to be completed within a predetermined time required for regeneration (for example, 30 minutes) at the latest.

Therefore, if the removal process is not completed within the required regeneration time, the manual regeneration control is terminated. Such termination of manual regeneration control is defined as abnormal termination of manual regeneration control. Incidentally, the required regeneration time is counted by a timer or the like built in the control unit 36 that starts counting when the manual regeneration flag is set to 1 or when the removal process is started (when the first step S9 is executed).

On the other hand, in order to normally end the manual regeneration control, it is necessary to regenerate the filter function of the DPF within the regeneration required time. , is making it happen. That is, in order to normally terminate the manual regeneration control, it is necessary that the DPF pressure sensor 37 detects that the DPF state is at level 0 in step S8 before the regeneration required time elapses.

In step S11, when the filter function of the DPF cannot be regenerated within the above-described regeneration required time (specifically, in step S11, when the timer counts and the elapse of the regeneration required time is confirmed), While proceeding to step S12 in order to execute the process of abnormally ending the manual regeneration thereafter, if the regeneration required time has not yet elapsed, the process returns to step S1 in order to continue the execution of the manual regeneration control thereafter. .

In step S12, the manual regeneration flag is set to 3 for abnormal termination, and the process returns to step S1. When it is confirmed in step S7 that the manual regeneration flag is set to 3, the process proceeds to step S13, and since the processes following step S7→step S8→step S9 are not executed, the manual regeneration is terminated abnormally. .

In step S13, the DPF indicator lamp 28b is flashed at a higher speed at a shorter period than the flashing period in the process of step S3 to notify the abnormal end of the manual regeneration control, and the process returns to step S1. In other words, the DPF indicator lamp 28b also functions as abnormality notification means for notifying abnormal termination of manual regeneration control.

In step S9, if the state of the DPF becomes level 0, it means that the filter function of the DPF has been regenerated within the regeneration required time, so the process proceeds to step S14. Incidentally, during execution of the manual regeneration control, steps S1→step S7→step S8→step S9→step S1→step S7→step S8→step S9→from when the execution of the regeneration control is once started until the state of the DPF reaches level 0 within the required regeneration time. The process of step S10→step S11→step S1→ . . . is repeated, and the execution of manual regeneration control continues.

In step S14, the manual regeneration flag is set to 2, and the process returns to step S1. After that, it is confirmed that the manual regeneration flag is 2 in step S7. In this case, the process proceeds to step S15, so the manual regeneration control in step S9 is no longer executed, and the manual regeneration is performed. Control ends normally.

In step S15, it is checked whether or not a predetermined cool-down time (for example, 5 minutes) has elapsed since the normal termination of the manual regeneration control. The cool-down time is counted by a timer or the like built into the control unit 36 that starts counting from the time when the manual regeneration flag is set to 3. In step S15, if the cool-down time has not elapsed yet, the process proceeds to step S16.

In step S16, the DPF indicator lamp 28b is turned on to inform the control unit 7 that the entire combine including the engine should be cooled down, and the process returns to step S1. That is, the DPF indicator lamp 28b also functions as cool-down notification means for urging the operator to cool down (not to run on the road or run for harvesting).

If it is determined in step S15 that the cooldown time has elapsed, the process proceeds to step S17. In step S17, the manual regeneration flag is reset to 0 in order to stop the notification prompting the cooldown, and the process returns to step S1. After that, the process proceeds in the order of step S1→step S2→ .

It should be noted that even if an operation from the cutting/off power clutch switch 34 is input to the control unit 36 by an electrical signal during execution of the manual regeneration control, the control unit 36 cancels the operation and maintains the stopped state. Further, when the control unit 36 detects that the main gear shift lever 29 has been swung to an operation position other than the neutral position for stopping travel by the main gear shift lever potentiometer 38 during execution of manual regeneration control, the manual regeneration flag is set. is reset to 0 to terminate manual regeneration control. This termination is not judged to be an abnormal termination.

FIG. 8 is a flowchart showing the details of processing of well-known notification control. When the power is turned on or the engine is started and the process is started, the control unit 36 starts the process from step S21. In step S21, a direction instruction operation is detected by the turn signal switch 39, and when a left direction instruction operation is detected, the process proceeds to step S22. In step S22, the three left winkers 13L, 14L, 16L are all flashed to indicate that the traveling machine body 2 is about to turn left or is in the process of turning, and the process returns to step S21.

In step S21, if a right direction instruction operation is detected, the process proceeds to step S23. In step S23, the three right winkers 13R, 14R, and 16R are all flashed to indicate that the traveling body 2 is about to turn right or is in the process of turning, and the process returns to step S21.

In step S21, if the neutral state is confirmed without detection of a direction instruction operation to either the left or right, the process proceeds to step S24. In step S24, it is checked whether the notification execution switch 32 is turned on or off, and if it is in the on operation state, the purpose is to inform people around the traveling machine body 2 (this combine harvester) by using the various above-described surrounding notification means. While proceeding to step S25 in step S25, in the case of the off-operation state, such notification to the surroundings is unnecessary, so the process returns to step S21.

In step S25, the state of the manual regeneration flag is checked, and if the manual regeneration flag is set to 1, the manual regeneration control is being executed, and the combine is notified to that effect. If the manual regeneration flag is set to a value other than 1 while proceeding to step S26 for the purpose of giving information to a person in the vicinity of the vehicle, the notification is unnecessary and the process returns to step S21.

In step S26, all the lamps 13L, 13R, 14L, 14R, 16L, and 16R are flashed to execute a regeneration notification process for informing people around the combine that manual regeneration control is being executed. The process is returned to S21.

That is, in the ambient notification control configured by the processing of steps S21 to S26, the direction indication processing by the direction indication operation is preferentially executed, and the direction indication is not performed and the manual regeneration control is performed. In this case, reproduction notification processing is executed.

According to the combine harvester configured as described above, the six lamps 13L, 13R, 14L, 14R, 16L, and 16R can be used to appropriately give various notifications to people around the combine harvester. In particular, since the regeneration notification process is executed while the combine is stopped and the manual regeneration control is being executed, people around the combine can accurately and quickly grasp the situation.

In addition, when the manual regeneration control of the DPF executed in a low temperature environment such as winter ends abnormally without being completed within the required regeneration time, the DPF indicator lamp 28b is displayed in a manner different from other notifications (specifically Specifically, the abnormal end is notified by the high-speed flashing in step S13), so that the operator can quickly notice it. Incidentally, all the lamps 13L, 13R, 14L, 14R, 16L and 16R are extinguished when the abnormal termination is notified.

Furthermore, notification of cool-down is also performed by the DPF indicator lamp 28b. The pattern of this notification is the lighting of the DPF indicator lamp 28b in the same manner as in the mode of notifying that the manual regeneration control of the DPF is being executed. , 16L and 16R are extinguished, the operator can easily distinguish whether the cooling-down is being prompted or the manual regeneration control is being executed.

As the notifying means, a horn (not shown) that notifies people around the combine by sound may be used, and the intermittent blowing of the horn notifies that the manual regeneration control is being executed. Incidentally, the horn is connected to the output side of the control section 36 .

In addition, the rotation sensor provided on the transmission shaft of the traveling transmission that changes and transmits power from the engine to the left and right traveling parts 1L and 1R instead of the main gear lever potentiometer 38 indicates whether or not the traveling body 3 is traveling and the traveling speed. You may detect by etc. In this case, the rotation sensor functions as the running detection means.

Furthermore, according to the process of step 24, whether or not to execute the regeneration notification process is switched by turning on/off the notification execution switch 32. The switching may be performed when the switching condition, which is the condition described above, is satisfied. For example, the switching condition is to confirm the execution of memory backup to prevent information from being erased when the battery is replaced, and the process proceeds from step S24 to step S25 while the memory is being backed up. , the reproduction notification process may be implemented.

Further, a plurality of lights arranged in one direction may be provided as progress notification means for informing people around the combine of the progress of the manual regeneration control. Then, the progress can be grasped by increasing or decreasing the number of lighting lights. For example, the progress is divided into 5 stages of 0%, 25%, 50%, 75%, and 100%, and 4 lights are provided.

When the manual regeneration control is 0%, all the lights are turned off, when the progress is 25%, only one light on the one end side is turned on, and when the progress is 50%, the first light from the one end side is turned on. and the second light are turned on, and when the progress is 75%, the first light, the second light, and the third light are turned on from the one end side, and when the progress is 100% turns on all four lights.

By the way, a plurality of lights constituting this progress notification means may be arranged side by side in the left-right direction on the upper part of the back side of the combine equipped with the cabin, or the lights threshed and sorted by the threshing device 4 may be provided. The grains may be arranged side by side in the left-right direction on the upper surface side of the cover of the transport device in the left-right direction that transports the grains to the grain tank 6 .

2 Running body (body)
13L left front turn signal (surroundings notification means, lamp, turn signal)
13R right front blinker (surroundings notification means, lamp, blinker)
14L left center turn signal (surrounding notification means, lamp, turn signal)
14R right center turn signal (surroundings notification means, lamp, turn signal)
16L left rear turn signal (surroundings notification means, lamp, turn signal)
16R Right rear blinker (surroundings notification means, lamp, blinker)
21 engine control microcomputer (engine regeneration means)
38 Main shift lever potentiometer (driving detection means)
41 buzzer (surrounding notification means, abnormality notification means, cool-down notification means)

Claims (2)

A work vehicle that regenerates a capture filter that captures fine solids contained in exhaust gas,
an engine that emits exhaust gases;
the capture filter;
engine control means for controlling the engine to heat and remove deposits adhering to the trapping filter with exhaust gas from the engine;
a running detection means for detecting whether or not the body is running;
Surrounding notification means for notifying the surroundings of the aircraft;
manual regeneration operating means;
a cooldown notification means;
a control unit that performs regeneration control for removing deposits on the trapping filter and regenerating the filter function by the engine control means;
The control unit
configured to execute the regeneration control under at least one condition that an operation by the manual regeneration operation means is detected;
Further, when the regeneration control is being executed and the running detection means detects that the vehicle is stopped, regeneration notification processing is executed to perform notification by the surrounding notification means ,
Furthermore, after the execution of the regeneration control is normally completed, until a predetermined time has passed, the cool-down notification means is configured to perform a notification to prompt the cooling-down of the engine. work vehicle. Equipped with an anomaly notification means,
The work vehicle according to claim 1, wherein the control unit is configured to perform notification by the abnormality notification means when the regeneration control terminates abnormally.

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