JPH094481A - Engine output control device for running working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the fine control of the engine output by providing a control means for electronic control type fuel supply control device for automatically adjusting the fuel supply quantity so as to obtain the predetermined engine speed. SOLUTION: An electronic control type fuel supply control device 22 is automatically operated, and in this condition, a neutral position sensor of a speed change shift driving unit 30 is turned on, namely, the speed change is shifted to the neutral position. When a threshing switch 37 is turned off and an engine load is the predetermined value or less, the engine speed is forcibly lowered to the idling engine speed. In this condition that the work of a threshing unit as a working unit is not performed and a working machine is not in running condition, automatic control of the fuel supply quantity can be carried out. Engine speed is automatically reduced to the idling engine speed without manual idling operation by a worker by lowering the engine speed to the idling engine speed, and the waste fuel consumption is eliminated.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a harvesting machine such as a so-called general-purpose combine or normal combine which can thresh rice, wheat, soybeans and the like in front of the traveling machine body, and threshing.
In a traveling work machine such as a grass packing machine which packs grass cut in front of the traveling machine body in an appropriate weighing amount,
The engine speed is raised to a predetermined engine speed during work, but a control device that controls the engine output by adjusting the fuel supply amount so that the engine speed can be automatically set to the idling speed during non-work Is related to the structure of.

[0002]

2. Description of the Related Art In a general-purpose combine or the like having a cutting pretreatment device equipped with a reel and an auger at the front of a traveling machine equipped with a threshing unit, power is driven from one engine such as a diesel engine mounted on the machine. The work is transmitted to the driving unit, the pre-processing device for mowing, and the working unit such as the threshing unit to perform a predetermined work.

In this case, in order to increase / decrease the output of the engine in response to changes in the traveling speed of the traveling machine body and the load on the working unit, the amount of fuel supplied to the engine is also adjusted to increase / decrease. On the other hand, the required power and performance in the working unit such as the pre-mowing treatment device and the threshing unit are set based on the rated speed of the engine, regardless of the load on the engine during the work. It is preferable to operate the engine at the rated speed.

Therefore, Japanese Utility Model Application Laid-Open No. 56-167945 discloses that, regardless of the large or small fluctuation of the load on the engine for driving the working unit such as the combine drive unit, the pre-mowing treatment device and the threshing unit. It is disclosed that the engine speed is controlled by using an electronic governor controller that automatically adjusts the fuel supply amount to the engine so that the engine speed is maintained at a predetermined speed such as a so-called rated speed.

By the way, in order to interrupt the cutting and threshing work once, when the work clutch for interrupting the power transmission to the threshing section and the pre-shearing processing device is turned off, the handling cylinder, the threshing rotor and the pre-shearing process in the threshing section are turned off. The rotation of the reel and auger in the device is stopped. Even in this state, if the engine rotational speed is kept at a higher rotational speed than during idling in preparation for traveling the combine while the work clutch is turned off, the traveling work is likely to start, but the work is performed. Depending on the circumstances, it may not always be necessary to drive the combine.

[0006]

Therefore, as described above, maintaining the engine speed higher than when idling causes the noise of the working machine to be increased and the fuel consumption to be increased. It was a waste of money. In addition, even when the work clutch is turned off,
If the engine speed is maintained at a predetermined value such as the rated speed in preparation for running the combine, in addition to the wasteful consumption of fuel as described above, Inconvenience also occurs.

That is, in order to restart the cutting and threshing work, when the driving of the working units such as the handling cylinder and the threshing rotor is once stopped and then rotated again, the work is performed while the engine speed is high. When the clutch is suddenly turned on, the rotating body such as the handling cylinder, the threshing rotor, the reel and the auger is generally a cylindrical body having a large diameter, and the inertial force is large. Therefore, the transmission unit of the rotational force to the working unit is damaged. There is a problem.

Further, in the above-mentioned prior art, only the output control of the engine in the working state, that is, the automatic fuel supply control is realized, and when the working state is changed to the non-working state, or conversely, the work is performed from the non-working state. Until the state is changed, there is no comprehensive engine output control, that is, automatic fuel supply control, and it is not possible to execute fine engine output control according to the situation.

An object of the present invention is to realize fine engine output control by executing idling control and its cancellation control, which could not be achieved conventionally.

[0010]

To achieve this object, an engine output control device of the present invention is configured to transmit power from an engine in a traveling work machine to a traveling device and a working unit, respectively. An electronically controlled fuel supply control device for automatically adjusting the fuel supply amount so that the engine speed becomes a predetermined value according to the load on the engine is provided, and the electronically controlled fuel supply control device is controlled. The control means turns on the power transmission of the clutch device to the working unit.
・ Connect a clutch sensor to detect the OFF operation, and force the engine speed to continue at the idling speed for a suitable period of time according to the detection signal when the power transmission to the working unit changes from OFF to ON. After that, while increasing the engine speed to a predetermined speed, when it is detected that the power transmission to the working unit is OFF, the engine speed is forcibly reduced to an idling state. A control means for controlling the electronically controlled fuel supply control device is provided.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment in which the present invention is applied to a harvester will be described. A traveling working machine 1 which is a general-purpose combine has a pair of left and right crawler type traveling devices 3 and 3 on the lower surface of a traveling machine body 2. On the right side of the front part of the traveling machine body 2, a control part 4 with a seat is arranged, behind which is provided an engine 8 and a grain storage tank 5, and on the left side of the traveling machine body 2, a circumferential outer surface is provided. A threshing section 6 having a front and rear long handling cylinder 6a and the like in which a double pitch screw plate and an appropriate number of handling teeth are planted,
Below that, there is a receiving net, and a swing selecting device 9 such as a sheave.
And a wind sorting device 10 based on the wind of Kara Min Juan.

Reference numeral 7a is a second reducing cylinder that conveys grains from a second gutter (not shown) so as to reduce them to the threshing section 6, and reference numeral 7b discharges the grains in the tank 5 to the outside. It is a discharge tube for. The reaping pretreatment device 11 communicates with a square tubular feeder house 12 that communicates with the front opening of the threshing unit 6 and a front end opening of the feeder house 12, and has a bucket-shaped platform that extends left and right over the entire width of the traveling machine body 2. The cutting pretreatment device 11 is attached to the front part of the traveling machine body 2 via a lifting hydraulic cylinder 14 so as to be lifted and lowered.

On the platform 13 of the pre-mowing treatment device 11, the tine bar 1 extends over the entire width of the traveling body 2.
A reel 16 with 5 is mounted so as to be rotationally driven in the direction of the arrow in FIG. 2, and the lower surface side of the platform 13 also has cutting blades 17 in the shape of left and right hair clippers, and above the bottom plate of the platform 13. , A horizontally long scraping auger 18 that rotates in the direction of arrow A is provided, and the reel 17 and the auger 18 are rotationally driven from a working mechanism speed change mechanism 19 described below via a lateral transmission shaft with a universal joint, and mowing Drive the blade 17.

The rotating reel 16 and tine bar 1
After cutting the grain culm that has been pulled backward at 5, with the cutting blade 17, the culm is collected by the auger 18 for scraping, and the harvested grain culm is rotated laterally on the platform 13 by the rotation of the auger 18 (auger 18). After being fed to the feeder board 12 at the front end opening portion of the feeder house 12 from the introduction port in the rear plate of the platform 13.
It is passed on to the inner conveyor 20.

The cutting grain culm is conveyed to the threshing section 6 by a chain conveyor 20 in which left and right long conveying plates are attached to a pair of right and left chains at appropriate intervals. Note that reference numeral 21
Is a grass body projecting forward from both left and right ends of the pre-mowing device 11, and the reel 16 is configured to be adjustable in forward and backward movement and adjustable in vertical swing according to the fall state of the grain stem or the like.

FIG. 3 is a block diagram of a path through which power is transmitted from the engine 8 to the traveling devices 3 and 3, the pre-mowing treatment device 11 and the threshing section 6, and a so-called electronic governor (electronically controlled fuel supply control device) 22 is used. Load sensor 23 of engine 8
The central control unit 24 controls the fuel supply amount (fuel injection amount) required by the engine 8 in accordance with the input signal.

The electronic governor 22 inputs the rack position of the fuel injection valve in the fuel injection pump to the central control unit 24 via the rack position sensor amplifier 26 so that the engine speed becomes constant (for example, rated speed). This rack position is adjusted so that the rack position is detected, and the gear shift lever of the traveling unit transmission mechanism 27 is driven to change the vehicle speed of the traveling devices 3 and 3. There is. Reference numeral 30 denotes a shift shift lever drive unit of the traveling unit shift mechanism 27.

Reference numeral 28 is a main clutch provided between the engine 8 and the traveling portion transmission mechanism 27, and reference numerals 29 and 29 are side clutches provided between the traveling portion transmission mechanism 27 and the left and right traveling devices 3, 3. . Reference numeral 31 is a work unit transmission that transmits power to the threshing unit 6 and the pre-mowing processing device 11,
Reference numeral 32 is a threshing section clutch, and reference numeral 33 is a reaping section clutch.

FIG. 4 shows a block diagram of the control means of the present invention, and reference numeral 24 is a read only memory (ROM) 3
5, a central control unit (CPU) including a readable / writable memory (RAM) 36, a timer, and the like, reference numeral 37 denotes a threshing switch which is turned on when the threshing unit clutch 32 is ON, and reference numeral 38 denotes an engine 8 An accelerator sensor that detects an operation position (accelerator position) when an electronic governor (electronically controlled fuel supply controller) 22 that controls fuel supply is operated by a manual accelerator lever 39, and a motor 40 when switched to an automatic accelerator. The accelerator lever 39 also rotates at.

Reference numeral 41 is ON when the shift shift drive section of the traveling section transmission mechanism 27 detects a neutral position.
The neutral switch 42 is to be turned ON when it is desired to execute the idling control of the present invention (automatic control for keeping the engine speed at the idling speed when a certain condition such as a non-working state is satisfied). It is an idling selection switch.

Reference numeral 43 is a rotation speed sensor for detecting the rotation of the engine 8. Next, engine output control such as idling control in the central control unit 24 will be described with reference to FIG.
Describing according to the flowchart shown in FIG. 7, in the engine output control subroutine (E-SUB),
When it is desired to execute the idling control in the determination of S1, the operator turns on the idling selection switch 42.

Next, when the threshing clutch 32 is turned on to execute the threshing work, the threshing switch 37 is turned on. Conversely, when it is desired to interrupt the threshing work, the threshing clutch 3
When 2 is turned off, the threshing switch 37 is turned off. Under the condition that the determination in S1 is yes, in S2, the threshing switch 37 is turned from OFF to ON.
It is determined whether it has changed to. That is, in S2, if the threshing work that has been interrupted or stopped until then is restarted, the result becomes yes, and in S3, the engine speed of the engine 8 is forcibly reduced to the idling engine speed, and this state is appropriately changed. Hold for a time (t3) seconds, and thereafter, in S4, respond to the accelerator target value by the accelerator position sensor 38 set by the accelerator lever 39 in a state where the engine speed is a predetermined target rotation speed such as a rated speed. The electronically controlled fuel supply control device 22 is controlled so that the amount of fuel supplied is controlled, and then the process is returned.

As a result, the threshing section 6 which has been temporarily stopped
When transmitting the power of the engine to the working portion such as the above, it is possible to eliminate damage to the transmitting portion that occurs when the power is suddenly transmitted at a high rotational speed. When the result in S2 is no, that is, when the threshing switch 37 continues to be in the ON or OFF state or when it is determined that it has changed from ON to OFF, it is determined in S5 whether the accelerator operation is manually performed. Determine whether.

At S5, it is determined whether or not the electronically controlled fuel supply control device 22 is manually operated. If yes (manual operation), the accelerator set by the accelerator lever 39 at S6. The fuel supply amount corresponding to the target rotational speed of the position is maintained for an appropriate time (t5) and then returned. When it is determined to be no (during automatic fuel supply control) in S5, it is determined in the next S7 whether or not the NA flag is "1", and the three condition continuation time (t
It is determined whether 1) has passed.

Here, when the NA flag is "1", it indicates that the engine is currently under idling control for setting the idling speed, and when "0", it indicates that the engine is not idling. When the condition of S7 is satisfied, the process returns, and when not satisfied, S8.
Move on to.

In S8, it is determined whether or not the shift shift drive unit 30 of the traveling unit transmission mechanism 27 for the traveling device 3 is in the neutral position. When the shift shift drive unit 30 is not in the neutral position (no), the threshing switch 37 is set to OFF.
Even if it is F, it corresponds to trying to run, so
As shown in FIG. 6, the process proceeds to S9, in which the rack position (accelerator position) of the electronically controlled fuel supply control device 22 is at the idle up position (the engine speed is equal to or higher than the idling speed, and the hydraulic travel is performed). Part transmission mechanism 27
Is equal to or higher than the engine speed required for efficient use of the engine), and if no (less than the idle up position), the engine speed is increased to the idle up position. (S10) Return afterwards, y
If es (equal to or higher than the idle-up position), in S11, control is performed such that the engine speed reaches the target speed corresponding to the arcel position over an appropriate time (t4), and then the process returns.

When the shift shift drive unit 30 is in the neutral position in S8 (yes), it is determined in S12 whether the threshing switch 37 is currently OFF. When the threshing switch 37 is currently ON (No), it means that the threshing work is being executed, and therefore the engine speed does not need to be idling-controlled, and the process returns.

At S12, the threshing switch 37 is currently turned off.
(Yes), as shown in FIG.
At 13 it is determined whether the engine load is W1 (this load W1 is a value set in consideration of the engine load when there is no load) or less, and when the load is W1 or more (no), In S14, the AJ flag is set to "0" and the timer T2 is reset.

The AJ flag is a signal for idling preparation. When the AJ flag = "1", the idling preparation is in progress, and when the AJ flag = "0", the idling preparation is not in progress. Then S1
At 5, it is determined whether the NA flag is "1". Here, when no (idling control is not being performed), the process is returned, and when yes (idling control is being performed), S1 is performed.
At 6 it is determined whether the engine load is W2 (Since the engine load may be W1 or more while the hydraulic equipment is operating, SW> W1) or more, and at S16, the engine load is W2 or more. If it is determined that the above is the case, after the engine speed has been adjusted to the target engine speed corresponding to the accelerator position over an appropriate time (t2) in S17, so that the engine can smoothly rotate in response to the load. , S18, NA flag is changed to "0".

When the engine load is less than or equal to W1 in S13, it is determined whether or not the AJ flag is "1" (S19), and if yes, the following three conditions (1) to (3) are continuously satisfied. It is determined whether or not a predetermined time (t1) has passed (S20), and yes (time up)
In the case of, the idling control is executed in S21, and then the NA flag is changed to "1" in S22 and then the process is returned.

That is, in S1 ,. The electronically controlled fuel supply control device 22 is in the automatic operation state. The neutral position sensor 41 of the shift shift drive unit 30 is ON, that is, the shift shift is at the neutral position, and in S12 ,. When the three conditions that the threshing switch 37 is OFF are satisfied and the condition that the engine load is less than or equal to the predetermined value W1 is satisfied in S13, the engine speed is forcibly reduced to the idling speed. When the above three conditions are satisfied, the automatic control of the fuel supply amount is performed without the work of the threshing unit, which is the working unit, and when the vehicle is not going to run. Executable state. In addition to this condition, the load of the engine is lower than the predetermined value W1. Therefore, by reducing the engine speed to the idling speed for the time (t1), the operator does not have to manually perform the idling operation. The engine speed can be automatically reduced to the idling speed, and wasteful fuel consumption can be eliminated.

If no (time has not elapsed) in the determination of S20, the process returns to the step before S2. In addition, in S19,
When the J flag is not "1" (no), S23
Then, the AJ flag is set to "1" at S24, and after the time (t1) is started at S24, it is returned to before S2. Note that the determination in S16 is no, that is, W
When the condition of 2> engine load> W1 is satisfied, S
The control shifts to idling control 21.

As a result, even when the hydraulic equipment (eg, hydraulic pump) is operating, the engine speed is reduced to an idling speed that is sufficient to realize this operation. As described above, when the above three conditions are deviated, the engine speed can be increased according to the conditions.

In the automatic control of the present invention, the working units other than the traveling unit are processed in the same manner as in the above embodiment even if the working unit has two or more working units such as the threshing unit and the pre-mowing treatment device. It goes without saying that you can do it.

[0035]

As described above, according to the configuration of the present invention, the working part clutch sensor indicates that the working part clutch such as the threshing part changes from OFF to ON when idling is required in a normal working state. If it is detected, the engine speed is forcibly maintained at the idling speed for a predetermined time and then the engine speed is raised again to the predetermined rated speed. In addition, there is an effect that it is possible to prevent the occurrence of an accident in which the power transmission unit is damaged due to a malfunction when the work is restarted.

On the other hand, when it is detected that the clutch of the working unit is OFF, the idling control for forcibly reducing the engine speed to the idling speed is executed, and the clutch of the working unit is OFF. At some time, the engine speed is reduced to the idling speed because the threshing unit, which is the working unit, is not in operation and is not in the state of running, and the automatic control of the fuel supply amount can be executed. By doing so, the engine speed can be automatically reduced to the idling speed even if the operator does not manually perform the idling operation, and there is an effect that wasteful fuel consumption can be eliminated. .

[Brief description of drawings]

FIG. 1 is a plan view of a combine.

FIG. 2 is a side view of the combine.

FIG. 3 is a block diagram of a power transmission unit from the engine.

FIG. 4 is a block diagram of an automatic speed control device.

FIG. 5 is a control flowchart (S1 to S12).

FIG. 6 is a control flowchart (S9 to S11).

FIG. 7 is a control flowchart (S13 to S24).

[Explanation of symbols]

 1 Traveling Work Machines 3, 3 Traveling Devices 6 Threshing Part 11 Mowing Pretreatment Device 23 Load Sensor 22 Electronically Controlled Fuel Supply Control Device 24 Central Control Device 26 Rack Position Sensor 27 Traveling Unit Transmission Mechanism 30 Accelerator Sensor 32 Threshing Part Clutch 37 Threshing Switch 41 Neutral switch 42 Idling selection switch

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Wataru Nakagawa Wataru Nakagawa 1-32 Chayamachi, Kita-ku, Osaka, Yanmar Agricultural Machinery Co., Ltd. (72) Hiroshi Kawabuchi 428 Enami, Okayama City Seirei Industrial Co.

Claims (1)

[Claims] 1. A motive power from an engine in a traveling work machine is transmitted to a traveling device and a working part, respectively, so that a rotational speed of the engine becomes a predetermined value according to a load on the engine. An electronically controlled fuel supply control device for automatically adjusting the amount of fuel supply is provided, and the control means for controlling the electronically controlled fuel supply control device has an ON / OFF operation for power transmission of the clutch device to the working unit. After connecting a clutch sensor for detecting and forcibly maintaining the engine rotation speed at the idling rotation speed for a suitable time by a detection signal in which power transmission to the working unit has changed from OFF to ON, While increasing the engine speed to a specified value, power transmission to the working section is turned off.
When it is detected that the engine output in the traveling work machine is provided with control means for controlling the electronically controlled fuel supply control device to forcibly reduce the engine speed to an idling state. Control device.