JPS62179313A - Engine control mechanism of combine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a combine harvester equipped with a threshing device that travels through a farm to reap and collect grain, and particularly to a control mechanism for an engine included in the combine harvester.

(b) Summary of the Invention The engine control mechanism for a combine harvester according to the present invention includes a retraction position detection means for detecting that the reaping section has moved to the retraction position, and the retraction position detection means detects when the reaping section has moved to the retraction position. By providing a supply control means that operates the fuel supply means to maintain the supply amount in a non-reaping operation state when movement is detected, it is possible to accurately determine when the reaping operation has ended, and to prevent a decrease in threshing accuracy due to a determination error. It is designed to prevent this.

(C) Prior art and its disadvantages The traveling device and threshing device mounted on a combine harvester are driven by a single engine. That is, the engine rotates the axle of the traveling device and also rotates the threshing barrel of the threshing device. In order to perform threshing work efficiently and with high precision, it is necessary to appropriately control the traveling speed and the rotation speed of the plow cylinder depending on the crop variety and the amount of moisture contained. If there is no reaping work to be done during this time, it is necessary to rotate the traveling device as fast as possible.

For this reason, conventionally, the amount of fuel supplied to the engine can be adjusted by a fuel supply means, and the amount of fuel supplied in the reaping operation state and the amount supplied in the non-reaping operation state are set in advance.
The system supplied the engine with an amount of fuel according to each condition, and controlled the engine's rotation speed.

However, in the engine control mechanism of such a conventional combine harvester, determination of a reaping work state and a non-reaping state is performed using a stock sensor. For this reason, there have been cases where the end of the reaping work is erroneously detected. For example, if the plants are deviated from the direction of travel or are spaced widely apart, it will be determined that there are no crops in front and the reaping work has ended. In addition, even large combine harvesters capable of mowing 4 rows are often equipped with only a single stock head sensor, and in such cases, when mowing one row or two rows, the stock head sensor does not turn on, resulting in non-reaping operation. Reaping and threshing work is carried out without any work being done. As described above, the conventional engine control mechanism has the drawback that the amount of fuel supplied during the reaping operation may not be maintained appropriately, resulting in a decrease in the processing accuracy and work efficiency of the threshing operation.

(d) Purpose of the Invention In view of the above-mentioned conventional drawbacks, the purpose of the present invention is to accurately determine whether or not the combine harvester is in the reaping state by accurately determining the end of the reaping work, and to accurately determine whether or not the combine harvester is in the reaping state, By correctly maintaining the supply amount in the working state and during non-reaping work, the engine rotation speed is appropriately controlled according to the working state, improving the processing accuracy and work efficiency of threshing work. The purpose of the present invention is to provide a combine engine control mechanism that can control the engine of a combine harvester.

(e) Structure and Effects of the Invention The engine control mechanism of the combine harvester of the present invention was developed with a focus on always moving the reaping section to the retreat position at the end of the reaping operation in order to avoid damage due to collision with obstacles. A combine harvester comprising a reaping section that changes the position between a reaping position and a retracted position, and a fuel supply means that adjusts the amount of fuel supplied to a reaping operation state or a non-reaping operation state. a retraction position detection means for detecting that the reaping section has moved from the reaping position to the retraction position; and when the retraction position detection means detects that the reaping section has moved to the retraction position, the amount of fuel supplied by the fuel supply means is adjusted to the reaping operation. The present invention is characterized by comprising a supply amount control means for changing the supply amount in the state to the supply amount in the non-reaping operation state.

According to the present invention with the above configuration, it is possible to detect that the reaping section has moved to the retracted position by the retracted position detection means. Further, when the retracted position detection means detects that the reaping section has moved to the retracted position, the supply amount control means can change the amount of fuel supplied to the amount of supply for a non-reaping operation state.

Therefore, whether or not the combine harvester is in the reaping operation state is determined based on the position of the reaping section, and based on this,
Fuel supply amount can be changed. In order to avoid damage due to collisions with obstacles while the combine is running, the reaping section is always moved to the retreat position after the reaping operation is completed. Therefore, it can be said that the combine harvester is in a reaping operation state when the reaping section is in the reaping section position, and is in a non-reaping operation state when the reaping section is in the retracted position.

From this, the retracting position detection means allows the reaping section to accurately maintain the amount of fuel supplied according to the working condition of the retracted combine harvester, and allows the rotation speed of the plow barrel to be appropriately controlled during the reaping operation to perform threshing operations. can improve processing accuracy and work efficiency.

('') Embodiment FIG. 2 is a schematic diagram showing the configuration of a combine harvester in which an engine control mechanism according to an embodiment of the present invention is used.

The combine 1 is provided with a pair of left and right crawlers 7 below as a traveling device, and the combine 1 is moved by the drive of these crawlers 7. A reaping section 2 is provided at the front of the combine 1. The reaping section 2 guides the front crop 20 into the combine harvester 1 and reaps it from the base of the plant. This reaping section 2 is movable in the direction of arrow A or B. The state shown in the figure is a reaping work state. From this state, it can be moved to the retracted position in the direction of the arrow. The reaping section 2 is provided with a sensor 9 which is a retraction position detecting means of the present invention.

A threshing chamber 4, which constitutes a part of a threshing device, is formed in the center of the main body of the combine harvester L. In this wood cutting chamber 4, a wood cutting cylinder 5 having a large number of wood cutting blades 6 is rotatably provided. The grain culm harvested by the reaping section 2 is guided to the milling chamber 4 via the conveying section 8 and is received! li! The husks are threshed between the husks 116 and the mill 5, and separated into grains and culm waste. Among these grains, the grains fall downward from the receiving net 16 and are sorted by the trough 15 and the like. The receiver falls downward from the net 16, and the sorted grains are stored in the grain hopper 10 as grains. The culm waste is guided to the discharge section 13 by a feed chain and discharged to the outside.

An operating section 3 is provided at the front part of the upper part of the combine harvester 7. This case part 3 is provided with a threshing lever 12. When the shelling lever is operated to the on side, the threshing sensor 13
turns on.

FIG. 3 is a block diagram of a combine harvester in which the engine control mechanism described above is used.

The rotation of the crankshaft of the engine 41 is transmitted to the L7 crawler 7 via a hydraulic transmission 42 and a transmission 43. An electromagnetic pickup 45 is provided facing a flywheel 44 fixed to the crankshaft of the engine 4I.゛This electromagnetic pickup 45
detects the rotation of the flywheel 44. The detection signal of the electromagnetic pink-up 45 is output to the timer/counter 27, and this count value is sent to the C through the I10 interface 27.
It is input to PU21.

The engine 41 is provided with a governor 41a which is a fuel supply means. The operation of the accelerator 49 is transmitted to the governor 41a via a link 49a. Also accelerator 4
9 is detected by potentiometer 49b.

Is the output voltage of this potentiometer 49b A/-? The digital amount corresponding to the position of the accelerator 9 is output to the F converter 28 and sent to the CPU 21 via the interface 24.
is input.

The on signals of the threshing switch 13 and variety switches 14 to 16 provided in the operation unit 3 are also transmitted through the I10 interface 24.
is input to the CPU 21 via the . Furthermore, the ON signal of the sensor 9 provided in the reaping section 2 is also input in the same manner. The sensor 9 is turned on when the reaping section 2 moves to the retracted position.

From CPtJ21, the gear lever motor 3 is connected to the gear lever motor drive relay 25 via I10 ink 7e and X24.
2 control signals are output. The speed change lever motor drive relay 25 operates the speed change lever motor 32 in response to this control signal, and moves the speed change lever 31. The operation of the shift lever 31 is transmitted to the hydraulic pump of the hydraulic transmission 42 via the link mechanism 31a. As a result, the hydraulic pump changes the discharge amount of pressure oil and changes the gear ratio when transmitting the rotation of the crankshaft of the engine 41 to the gear transmission 43.

Further, a control signal for the accelerator motor 50 is outputted from the CPU 21 to the accelerator motor drive relay 26 . Accelerator motor drive relay 26 operates accelerator motor 50 in response to this control signal to move accelerator 49. Movement of the accelerator 49 is transmitted to the governor 41a through a link 49a, and the amount of fuel supplied to the engine 41 is changed.

A timer 29 is connected to the CPU 21.

Each time the timer 29 times up, the CPU 21 reads out the counted value from the timer/counter 27. CPU2
A ROM 22 connected to 1 is controlled with programs for vehicle speed control and automatic rotation speed control. Also, R
The data to be input/output is stored in AM23. During vehicle speed control, a control signal is output to the speed change lever motor drive relay 25 based on the operation specified by the switch that is turned on. This operation causes the gear lever motor 3 to
2 operates, and the gear ratio of the hydraulic transmission 42 is changed. As a result, the rotational speed of the crawler 7 is changed, and the vehicle speed of the combine I is also changed. Also, the output signal of the vehicle speed sensor 46 is read out from the timer/counter 27,
This value is recorded in the ROM 22. The speed change lever motor 32 is controlled so as to match the set value α. During automatic rotation speed control, the rotation speed of the engine 41 is read from the output signal of the electromagnetic pickup 45. This output signal is ROM
A control signal for the accelerator motor 50 is output to the accelerator motor drive relay 26 so as to match the set value stored in the accelerator motor 22. The operation of the accelerator motor 50 is controlled by the governor 41a.
The amount of fuel supplied to the engine 41 is changed to control the rotation speed.

FIG. 1 is a flowchart showing the operation of the engine control mechanism of the combine harvester.

After the main key is turned on, data is input in step nl (hereinafter "step ni" is simply referred to as "ni"). The data input here is the reaping conditions such as the crop variety, and is input by a switch provided on the operation unit 3.

At n2, the set engine speed R is read from the ROM 22 based on the input data. Next, at n3, the threshing switch 13 is turned on and it is determined whether or not the threshing operation is selected.

If the threshing switch 13 is on at n3, the process proceeds to n4, where it is determined whether or not the sensor 9 is off. At n4, the reaping section 2 is in the reaping position, and the sensor 9
If it is off, proceed to n5. At n5, the current engine speed Ra is detected. Next, at n6, the difference r between the current rotation speed Ra and the set rotation speed R is calculated.

At n7, it is determined whether the difference r is within the range of the set value. If the difference r is within the range of the set value, the process returns to n3. If the difference r is larger than the set value at n7, the process proceeds to n8, moves the accelerator motor 50 in the direction of decreasing the supply amount, and returns to n3. Furthermore, if the difference r is smaller than the set value minus, the process proceeds to n9, and the accelerator motor 5
Rotate 0 in the direction of increasing the supply amount and return to n3. During reaping work, n3-=n4-n5→n6-+n7~n9
This operation is repeated, and the set one rotation number R based on the reaping conditions is maintained. At this time, the governor 4 which is the fuel supply means
Fuel in a reaping operation state is supplied to the engine 41 from 1a.

At n4, the reaping section 2 moves to the retracted position, and when the sensor 9 is turned on, the process proceeds to nlo. At n10, the rotation of the accelerator motor 50 is controlled so that the current rotation speed Ra of the engine 41 becomes the maximum rotation speed Rm. As a result, the governor 41a
From this point, fuel is supplied to the engine 41 in an amount corresponding to a non-reaping operation state. From nlO, the process returns to n3, and when the sensor 9 turns off again, the process proceeds from 04 to n5, and the accelerator motor 50 is activated so that the supply amount reaches the reaping work state by the operations from n7 to n9.
is controlled. This n4. nlO is the supply amount control means of this invention.

As described above, according to this embodiment, when the reaping section 2 is in the reaping position after the threshing operation is selected, the governor 41
a controls the amount of fuel to be supplied to the engine 1 during the reaping operation. Further, the threshing drum 5 of the threshing device rotates at a speed according to the input data, and the processing accuracy of the threshing operation can be maintained.

On the other hand, when there is no crop in front of the combine harvester 1 during the threshing operation, the passer 9, which interrupts the reaping operation and moves the reaping section 2 to the retracted position, is turned on and proceeds to n"10 to return to the non-reaping operation state. The supply amount in the non-reaping work state is larger than that in the reaping work state, and the engine 4
The rotation speed of No. 1 is the maximum value Rm, and the moving speed of the combine harvester can be increased in the non-reaping operation state. This reduces the interruption time of threshing operations and improves the operating efficiency of the combine harvester. Furthermore, since the transition from the reaping work state to the non-reaping work state is detected based on the state of the reaping section 2, the engine can be accurately controlled according to the work state of the combine harvester.

[Brief explanation of drawings]

Fig. 1 is a flowchart showing the operation of the engine control mechanism of a combine harvester according to an embodiment of the present invention, Fig. 2 is a schematic side cross-sectional view showing the structure of a combine harvester in which the engine control mechanism is used, and Fig. 3 is a flowchart showing the operation of the engine control mechanism of a combine harvester according to an embodiment of the present invention. It is a block diagram of a control part. 2-Reaping part, 9-Sensor, 41a-Governor, 50-Accelerator motor.

Claims (1)

[Claims] (1) In an engine control mechanism for a combine harvester, which includes a reaping part that changes its position between a reaping position and a retracted position, and a fuel supply means that adjusts the amount of fuel supplied to a reaping operation state supply amount or a non-reaping state supply amount. , a retraction position detection means for detecting that the reaping section has moved from a reaping position to a retraction position; and when the retraction position detection means detects that the reaping section has moved to the retraction position, supplying fuel by the fuel supply means. An engine control mechanism for a combine harvester, comprising: supply amount changing means for changing the supply amount from a supply amount in a reaping operation state to a supply amount in a non-reaping operation state.