JP2001028930A - Axle control device of combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the useless rotation of the engine on non-works to reduce noises and save fuel. SOLUTION: This axle control device of a combine harvester is provided with an axle lever for adjusting the rotation speed of an engine to a target rotation speed and with a travel lever for adjusting the vehicle speed, wherein the travel lever is interlocked with the axle lever to automatically control the rotation speed of the engine. Therein, the rotation speed of the engine is set to a lower rotation speed than the target rotation speed, when the stop and non-work states of the combine harvester is detected in a state that the threshing lever for directing threshing works is inputted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator control device for a combine which reduces the engine speed to a lower speed than the rated speed when the combine is stopped and not working, thereby reducing noise and fuel. is there.

[0002]

2. Description of the Related Art An accelerator lever operating means for raising and lowering the engine speed to a target speed and a traveling lever operating means for increasing and decreasing the vehicle speed are provided. When the means is moved to the speed increasing side, the accelerator lever also moves to increase the engine speed accordingly, and when the traveling lever operating means is moved to the deceleration side, the accelerator lever also moves to the direction to decrease the engine speed, so that the engine speed is increased. There is known an accelerator control type combine which is designed to maintain a rated value.

[0003]

In such a conventional accelerator control type combiner, the engine is maintained at the rated speed in any case when the threshing lever for instructing the threshing operation is turned on. Normally, the threshing lever is often turned on when the vehicle is going straight on the road and remains in operation during the work. Conventionally, when the threshing lever is in the on state, the engine alone is rotated at the rated speed. However,
Even when the combine is stopped and the threshed culms have been threshed and no work is being performed, keeping the engine running at a rated speed generates noise and wastes fuel. The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to suppress unnecessary rotation of an engine during non-working, reduce noise, and save fuel. is there.

[0004]

In order to achieve the above object, the present invention comprises an accelerator lever operating means for raising and lowering the engine speed to a target speed, and a traveling lever operating means for increasing and decreasing the vehicle speed. An accelerator control device for a combine that automatically adjusts the engine speed by linking the accelerator lever operation means with a travel lever operation means, comprising a threshing lever for instructing threshing work, and detecting a vehicle speed of the combine. A sensor and a grain culm sensor for detecting whether the combine is working or not, wherein the vehicle speed sensor and the vehicle speed sensor indicate that the combine is stopped and not working with the threshing lever in the on state. When detected by the culm sensor, the engine speed is set to a lower speed than the target speed. It is intended.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall side view showing an example of a combine according to the present invention. The combine according to the present invention includes a combine crawler a, a crawler drive shaft b, a cutting unit c, a feed chain d that feeds a cut grain culm to a threshing machine while transporting the cut grain, and a grain that stores threshed grain. It has a tank e and an auger f for discharging the stored grains outside the machine.

FIG. 2 is a layout view of switches in the driver's seat of the combine according to the present invention. Travel lever (HST)
The lever 1 is tilted back and forth to increase or decrease the vehicle speed. When the vehicle is tilted forward from a neutral position in the figure, the speed is increased in the forward direction, and when it is tilted backward, the speed is increased in the reverse direction. When the vehicle is returned from the forward or reverse position to the neutral position, the speed is reduced, and the aircraft stops at the neutral position. The accelerator lever 2 tilts back and forth to open and close the throttle to raise and lower the engine speed. Tilt forward to open the throttle and raise the engine speed, and tilt backward to close the throttle and increase the engine speed. Lower. The power steering lever 3 is tilted back and forth and left and right to operate the raising and lowering of the reaping unit and the turning of the machine body.
The aircraft turns to the left when tilted to the left, and turns to the right when tilted to the right.

The combine according to the present invention is provided with an accelerator control device in which an HST lever 1 for increasing / decreasing a vehicle speed is linked with an accelerator lever 2 for increasing / decreasing an engine speed to keep the engine speed at a rated value. I have. FIG. 3 is a block diagram showing an accelerator control device according to the present invention. The accelerator control device includes an accelerator automatic switch 51 for selecting accelerator control via an input interface 5a on the input side of the CPU 5, an engine rotation sensor 52, an accelerator lever position sensor 53, an HS
A T lever position sensor 54 is connected, and an accelerator lever opening / closing motor 58 and an HST lever increase / decrease motor 59 are connected to the output side via the output interface 5b.

[0008] The accelerator control device is configured as described above.
When the accelerator automatic switch 51 is turned on, the accelerator automatic adjustment mode is set. First, a reference operation range of the accelerator lever 2 for automatically operating the accelerator lever 2 following the HST lever 1 is set. In the accelerator automatic adjustment mode, the accelerator lever position sensor 53 and H
The target value of the engine speed is set based on the sensor values of the ST lever position sensor 54 and the engine speed sensor 52, and the accelerator lever opening / closing motor 58 is set so that the current engine speed matches this target value within the reference operation range. Is output to adjust the accelerator position value.

The accelerator control device further includes a grain culm sensor 55, a vehicle speed sensor 56, and a threshing switch 57. The signal detection of the grain culm sensor 55 determines whether or not a mowing operation is being performed. That is, the start of cutting is detected when the grain stalk sensor 55 switches from off to on, and the end of cutting is detected when the grain stalk sensor 55 switches from on to off. The grain culm sensors 55 are installed at two points on the entrance side and the discharge side of the transport path for the cut grain culm (these are referred to as grain culm sensors (front) and grain culm sensors (rear), respectively).
The vehicle speed sensor 56 detects the vehicle speed of the aircraft, and the threshing switch 57 is turned on by turning on the threshing lever.

FIG. 4 is a flowchart of the control of the accelerator control device. When the process is started, first, it is determined whether or not the engine speed is 500 rpm or more (step 21), and it is determined whether or not the accelerator automatic switch is turned on.
(Step 22), determine whether the threshing lever is in
(Step 23), it is determined whether the vehicle speed is less than 0.01 m / s (Step 24). And a grain culm sensor
It is determined whether the (front) and cereal culm sensors (rear) are off (steps 25 and 26), and if it is detected that the culm sensor (rear) has been switched from on to off (step 27). ), A threshing monitoring timer is set, a predetermined time is counted, and the accelerator rating flag is reset (step 28). When the threshing monitoring timer is up (Step 2
9) It is determined whether the accelerator rating flag has been set (step 30). And the engine speed is 2
000 rpm is determined (step 31).
If it is not less than 000 rpm, an accelerator close is output (step 32). When the engine speed is not higher than 2000 rpm or when the accelerator is closed, it is determined whether or not the accelerator is changed (step 33).
If there is a change in the opening, it is determined whether or not the monitoring timer of the accelerator is up (step 35). If the timer is not up, it is determined whether or not the accelerator changes by 0.2 V or more (step 36). If so, the accelerator rating flag is set (step 37), and the conventional engine rating control is performed (step 36). 38). If there is no change in the accelerator opening in step 33, the monitoring timer for manual accelerator operation is set (step 34).

That is, in the accelerator control device embodying the present invention, when the engine speed is 500 rpm or more, the accelerator automatic switch is turned on and the accelerator automatic adjustment mode is set, and the threshing lever is used as in the case of interruption of work. When the combine is stopped, the grain stalk sensor (rear) is switched from on to off, and the time required for threshing of the cut grain stalk elapses until a certain time elapses Up to the rated engine speed,
Thereafter, the accelerator is opened / closed to be positioned at a low rotation position lower than the rated rotation, for example, about 2,000 rpm.

[0012] In the conventional accelerator control, if the threshing lever is turned on, the engine keeps the rated rotation in any case. However, as in the present embodiment, for example, the work is interrupted and the combine is stopped. When the threshing operation is not performed, the engine speed is reduced to a predetermined speed lower than the rated speed, even if the threshing lever is engaged, to suppress unnecessary rotation and reduce noise and save fuel. be able to. Next, in connection with the present invention, a description will be given of an accelerator control device of a combine which restarts the control of maintaining the rated rotation of the engine when the accelerator lever is manually operated in the opening direction in the above-described embodiment.

In the accelerator control device, when the above-described engine low-speed control is performed while the combine is stopped and the threshing lever is on, the accelerator lever position sensor 53 shown in FIG. When the operation is detected, that is, when the operator manually operates the accelerator lever 2 in the opening direction, the rated rotation maintaining control of the engine is performed again. Then, the control for maintaining the rated engine speed is maintained until a certain period of time elapses after the switch from the on state to the off state of the grain culm sensor (rear) is detected again. When the threshing lever is on and the operator manually opens the accelerator lever when the combine is stopped, the operator performs the so-called hand-handling operation, in which the grain stalk is cut by hand and supplied to the stopped combine to thresh. Therefore, according to this accelerator control device, an engine speed suitable for threshing in that case is maintained, and there is also an assist effect of the accelerator operation by the operator.

Next, in connection with the present invention, a description will be given of a combine accelerator control device for controlling the engine rotation to be higher than the rated value while the HST lever is operated forward or backward. FIG. 5 is a flowchart of control of the accelerator control device. When the process is started, first, it is determined whether or not the engine speed is 500 rpm or more (step 41). If it is 500 rpm or more, it is determined whether or not the accelerator automatic switch 51 is turned on (step 42). Accelerator automatic switch 5
When the HST lever 1 is in operation, it is determined whether the HST lever 1 is being operated, that is, whether or not the operation position is positioned on the forward or reverse side (step 43). It is determined whether or not it is positioned (step 44). If it is positioned at the highest speed position, it is determined whether or not the accelerator has changed in the opening direction (step 45). If so, the accelerator full-open timer is set (step 46), and then the accelerator opening is output (step 46). Step 49). Step 4
If the result of step 5 is negative, it is determined whether or not the timer for fully opening the accelerator is up (step 47), and if not, the accelerator open is output in step 49. Meanwhile, step 44
Is negative, the engine speed is 2800 rpm
It is determined whether or not this is the case (step 48), and if not, an accelerator opening is output in step 49.

That is, in this accelerator control device, when the accelerator automatic switch 51 is turned on and the engine speed is 50
At 0 rpm or more, when it is detected that the HST lever 1 is operated forward or backward, the accelerator opening output is performed so that the engine speed is higher than the rated value, for example, at 2900 rpm. The accelerator control type combine is designed to automatically position and maintain the engine speed at the rated value with threshing, but otherwise, if the accelerator control does not work, such as when driving on the road, the operator manually operates the accelerator. The engine speed had to be set by operation. According to this embodiment, the trouble of the operator as described above is eliminated,
From the threshing operation, by quickly setting the engine state suitable for traveling on the road and maintaining the engine state, stable traveling can be always performed.

In the embodiment of the accelerator control device shown in FIG. 5 described above, if the operating position of the HST lever 1 is at the highest speed position, the accelerator is set to the maximum speed, for example 3000 rpm, when the accelerator is fully opened. An automatic opening operation is performed to position the accelerator lever 2 in a fully opened state.
Thereby, high-speed running on the road can be realized. Then, the HST lever position sensor 54 detects the HST
Until the deceleration operation of the lever 1 is detected, the position of the accelerator lever 2 is kept fully open, and after the deceleration operation of the HST lever 1, the control for maintaining the rated engine speed is restarted.
Next, in connection with the present invention, a combine will be described in which the supply section is adjusted to be deeper at the beginning of mowing and the accelerator control is adjusted to be one step higher than a normal rating.

FIG. 6 is a block diagram of a control mechanism of such a combine. That is, an accelerator automatic switch 61, a turning control automatic switch 62, a left and right up / down lever switch 63, a threshing switch 64, a grain culm sensor 65, an engine rotation sensor 66, and an accelerator automatic switch 61 for selecting accelerator control via the input interface 6a on the input side of the CPU 6. An adjustment head sensor 67, a supply adjustment stock sensor 68, an accelerator lever position sensor 69, an HST lever position sensor 70, and a supply unit position sensor 71 are connected, and an accelerator lever opening / closing motor 72 is connected to an output side via an output interface 6b. , HST lever increasing / decreasing motor 73, left / right solenoid 74, and up / down solenoid 75.

FIG. 7 is a flowchart of the control mechanism. Based on the flowchart, the control mechanism of the combine according to the present invention will be described. When the process is started, first, the cutting lever lowering switch, the grain culm sensor value, the cutting position value, the tip / stock sensor value, and the accelerator lever position value are read (steps 77 to 81).
Is turned on (step 8).
2) If it is not turned on, it is determined whether or not the mowing position is being controlled (step 83). If the mowing position control is being performed, the supply unit is adjusted to the deep side, and the accelerator control is adjusted one step higher than the normal rated rotation (steps 84 and 85). If the grain culm sensor 65 is turned on in step 82, the supply section adjustment is started by the head / stock sensor 67, 68 (step 86). And the head / stock sensor 67, 6
It is determined whether or not 8 has become neutral (step 87). When the sensor has become neutral, normal accelerator control is started (step 88).

In short, when cutting is started, that is, when the cutting lever is lowered before entering the grain stalk and the cutting position control is started, the supply unit is adjusted to the deep side and the accelerator control is increased from the rated value to increase the engine speed. Is also adjusted one step higher. When the cereal stalk enters and the cereal stalk sensor 65 is turned on, the spike / stock sensor 67, 6
8 is started, and the head / stock sensor 67,
When 68 becomes neutral, normal accelerator control is started to perform rated holding control.
At the beginning of mowing, the feed section when entering the grain culm is on the deep side, that is, on the deep handling side, because the detection by the supply adjustment sensor is unstable, detection is delayed, and the cutting height starts higher. Is the best, but if the feed section is adjusted deeper, the threshing / sorting section is likely to be overloaded, which causes a disadvantage that the rotation of the engine is lower than usual. According to the combine of the present invention, the supply portion is adjusted deeper, and the accelerator control is adjusted one step higher to increase the engine rotation in advance, so that the above-described disadvantage does not occur.

Next, in connection with the present invention, a brake control mechanism of the HST lever used for a mobile device such as a combine, a tractor, a rice transplanter or the like will be described. FIG. 8 is a control block diagram of a combine implementing the brake control mechanism. An input interface 100 is provided on the input side of the CPU 100.
a, direction control automatic switch 101, left / right up / down lever switch 102, threshing switch 103, grain stem sensor 1
04, vehicle speed sensor 105, engine rotation sensor 106,
The direction left position sensor 107, the direction right position sensor 108, the mowing position sensor 109, and the HST lever position sensor 110 are connected, and the output side is connected to the left solenoid 111 and the right solenoid 112 via the output interface 100b.

FIG. 9 is a control flowchart of the combine in which the brake control mechanism is implemented. When processing starts, first read the position value of the HST lever
(Step 121), it is determined whether or not the HST lever has been operated from a position near neutral to a position direction larger than the medium speed (Step 122). If so, it is determined whether the brake control of the HST lever has been completed (step 123). If the brake control has not been completed, the left and right solenoid valves (brake hydraulic valves) are turned on. The time (operating time) is reduced at regular intervals (step 124), and when the on-time of the left and right solenoid valves becomes zero (step 12).
5) The brake control ends (step 126).

That is, the HST lever is moved from the position near the neutral position by the HST lever position sensor.
When it is detected that the operation has been performed to a position where the speed increases in the forward or reverse direction (for example, greater than the medium speed), the on-time of the solenoid valves provided on the left and right sides of the aircraft is reduced at regular intervals, and The operation of both brakes is gradually released. Therefore, even when the HST lever is suddenly moved forward from neutral or accelerated in the reverse direction by sudden operation of the lever, there is no possibility that the aircraft will rapidly start. In addition, this brake control mechanism includes not only the above-mentioned combine but also tractors, rice transplanters,
Of course, the present invention can be applied to a mobile device such as a management device.

[0023]

As described above in detail, according to the accelerator control device for a combine according to the present invention, even when the threshing lever is engaged and the rated rotation of the engine is controlled, the combine is stopped. When the threshing operation is not being performed, the engine speed is automatically reduced to a predetermined speed lower than the rated speed, thereby suppressing unnecessary rotation and reducing noise and saving fuel. This has the effect.

[Brief description of the drawings]

FIG. 1 is an overall side view of a combine according to the present invention.

FIG. 2 is a switch layout diagram of a driver's seat of a combine according to the present invention.

FIG. 3 is a block diagram of an accelerator control device for a combine according to the present invention.

FIG. 4 is a flowchart of control of an accelerator control device according to the present invention.

FIG. 5 is a flowchart of control of an accelerator control device according to another embodiment of the present invention.

FIG. 6 is a block diagram of a combine control mechanism according to the present invention.

FIG. 7 is a flowchart of a control mechanism of the combine.

FIG. 8 is a control block diagram of a combine implementing a brake control mechanism for an HST lever according to the present invention.

FIG. 9 is a control flowchart of a combine that also implements a brake control mechanism.

[Explanation of symbols]

 Reference Signs List 1 HST lever 2 accelerator lever 3 power steering lever 5 CPU 5a input interface 5b output interface 51 accelerator automatic switch 52 engine rotation sensor 53 accelerator lever position sensor 54 HST lever position sensor 55 grain sensor 56 vehicle speed sensor 57 threshing switch 58 accelerator lever opening / closing motor 59 HST lever increase / decrease motor 67 Supply adjustment tip sensor 68 Supply adjustment stock sensor 71 Supply unit position sensor a Combine crawler b Crawler drive shaft c Cutting unit d Feed chain e Grain tank f Auger

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) F02D 41/04 F02D 41/04 45/00 305 45/00 305D F term (reference) 2B074 AA01 AB01 AC02 BA11 BA15 DA02 DB04 DC01 DE05 EA13 EB01 EB06 EC01 EE07 2B076 AA03 EA03 EB01 EC09 EC11 ED11 3G065 BA04 CA02 DA05 DA06 EA10 FA06 GA01 GA10 GA11 GA46 JA02 JA06 JA09 JA11 3G084 AA07 BA03 DA02 DA20 EA11 EC02 FA33 FA03 FA03 FA03 LB PE01Z PF01Z PF03Z

Claims (1)

[Claims] An accelerator lever operating means for raising and lowering the engine speed to a target speed, and a traveling lever operating means for increasing / decreasing a vehicle speed, wherein the traveling lever operating means is linked with the accelerator lever operating means to operate the engine. In the accelerator control device of the combine that automatically adjusts the rotation speed, it has a threshing lever that instructs threshing work,
A vehicle speed sensor that detects a vehicle speed of the combine, and a grain culm sensor that detects whether or not the combine is working, wherein the threshing lever is in a state where the combine is stopped and not working An accelerator control device for a combine, wherein when the vehicle speed sensor and the grain culm sensor detect that there is something, the engine speed is set to a speed lower than a target speed.