JP2585478B2 - Combine speed controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine load detecting means for detecting an engine load, and a transmission for traveling so as to maintain an engine load in a target load range based on information detected by the engine load detecting means. And a vehicle speed control device for automatically shifting the speed of the vehicle.

[0002]

2. Description of the Related Art A vehicle speed control device of a combine of this type includes:
The vehicle speed is automatically adjusted so as to maintain the engine load in a set state by using the increase / decrease of the supply amount of the shell culm to the threshing device according to the increase / decrease of the vehicle speed.

[0003] In the handling room of a threshing apparatus mounted on a combine, a dust valve for discharging treated material is generally provided, and the opening of the dust valve is adjusted in accordance with grain conditions, particularly, the grain-removing property. . In other words, for grains having low shedding properties, the staying time in the handling room is lengthened by setting the opening of the dust feed valve small, so that there is no unhandled grain.

Conventionally, the above-described vehicle speed control device has been designed to maintain the target load range and the speed change operation speed constant irrespective of a change in the opening of the dust feed valve.

[0005]

When the opening of the dust valve is set to a small value, the discharge of the processed material from the handling chamber is reduced. There is a slight delay as compared with the case where the opening degree of the dust valve is set large.

Therefore, if the target load range and the shift operation speed are determined based on, for example, the intermediate opening of the dust valve, if the opening of the dust valve is set to be small, the load reduction delay occurs. In such a case, an overload condition is easily caused, and there is a possibility that a trouble such as an engine stop may occur. Conversely, when the opening of the dust valve is set to a large value, the load is reduced quickly due to the reduction of the vehicle speed. There has been a problem that the engine capacity is maintained and the engine capacity cannot be used to the maximum, or the shift is performed at an unnecessary high speed and the control is difficult to stabilize. That is, conventionally, since both the target load and the shift operation speed are constant regardless of the opening degree of the dust valve, all of the above-mentioned problems cannot be solved.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has as its object to make the most of the capacity of the engine regardless of the change in the opening of the dust valve of the threshing apparatus.
To avoid problems such as engine stop,
Moreover, it is an object of the present invention to provide a combine vehicle speed control device capable of stabilizing control as much as possible.

[0008]

A first characteristic configuration of a combine vehicle speed control device according to the present invention is as follows.
It is configured to set the target load range on the load increasing side when the opening degree is larger than when the opening degree is small, based on the opening degree information of the dust discharge valve for processing material discharge of the handling room in the threshing device. There is in the point.

A second characteristic configuration is that the vehicle speed control means comprises:
The present invention is characterized in that the speed change operation speed is adjusted based on the opening degree information of a dust valve for discharging a processed material in a handling room in a threshing apparatus.

A third characteristic configuration is that the vehicle speed control means comprises:
The target load range is set to the load increasing side when the opening degree is larger than when the opening degree is small, based on the opening degree information of the dust discharge valve for discharging the processed material in the handling room in the threshing device, and the gear shifting operation is performed. It is configured to adjust the speed.

[0011]

According to the first feature, when the vehicle speed control means determines that the large opening is smaller than the large opening based on the opening information of the dust discharge valve for discharging the processed material in the handling room of the threshing device, While the target load range of the engine load is set on the load increasing side, the traveling transmission is automatically controlled so that the value of the engine load detected by the engine load detecting means is maintained in the target load range. The gearshift operation is performed. That is, when the opening degree of the dust valve is small, the target load range is set to the light load side, and even if the load reduction due to the deceleration tends to be delayed, it is possible to avoid the overload state,
Conversely, when the opening degree of the dust valve is large, by utilizing the fact that the load reduction accompanying deceleration is performed quickly, the target load range is set to the heavy load side, thereby effectively utilizing the engine capacity. is there.

[0012] According to the second characteristic configuration, the vehicle speed control means performs a shift operation while adjusting the shift operation speed based on the opening degree information of the dust discharge valve for discharging the processed material in the handling room of the threshing apparatus. Will be. In other words, for example, when the opening is large, the acceleration speed is set to be equal to or faster than the acceleration speed when the opening is at the neutral position, and the deceleration speed is set when the opening is at the neutral position. Set the speed equal to or lower than the speed. Conversely, when the opening is small, the acceleration speed is set equal to or slower than the acceleration speed when the opening is at the neutral position, and the deceleration speed is set when the opening is at the neutral position. Set to the same or faster side as the speed. Then, the traveling transmission is automatically shifted so that the value of the engine load detected by the engine load detecting means is maintained in the target load range. In other words, when the opening degree of the dust valve is small, the shift operation is performed at a high speed in response to the fact that the load reduction accompanying deceleration tends to be delayed, and conversely, when the opening degree of the dust valve is large, the shift operation speed is increased. Is controlled at a low speed to avoid problems such as hunting and stabilize control.

[0013] According to the third characteristic configuration, the vehicle speed control means, based on the opening information of the dust discharge valve for discharging the processed material in the handling room of the threshing apparatus, when the opening degree is smaller than when the opening degree is smaller. The target load range of the engine load is set on the load increase side, and at the same time, while the speed change operation speed is adjusted in the same manner as in the second characteristic configuration, the value of the engine load detected by the engine load detection means is set to the above value. The traveling transmission is automatically shifted so that the target load range is maintained. That is, the operation of the first characteristic configuration and the operation of the second characteristic configuration are exhibited together.

[0014]

According to the first characteristic configuration, the engine capacity can be effectively used while avoiding troubles such as stopping the engine.

According to the second characteristic configuration, the control can be stabilized as much as possible while avoiding troubles such as engine stop.

According to the third feature configuration, the effect of the first feature configuration and the effect of the second feature configuration can be obtained together.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 7, the combine is provided with a threshing device 3 mounted on a body 2 having a pair of right and left crawler traveling devices 1, and a boarding operation section 4 provided at a front portion of the body 2. A mowing part 5 is provided to be movable up and down. The cut hull culm cut by the cutting unit 5 is conveyed rearward and supplied to the threshing device 3.

Next, the structure of the threshing apparatus 3 is shown in FIGS.
It will be described based on. The threshing apparatus 3 includes a handling room A into which the cut husk culm is put, and a sorting device B that performs a sorting operation on a material leaked from the handling room A. And, on the ceiling cover 14 at the shell culm entrance side portion of the handling room A,
A contact-type culm detection sensor S4 for detecting whether or not the handling room A is in a culm supply state is mounted.

The shell culm detection sensor S4 will be described in further detail. The sensor is provided so as to be swingable about an axis parallel to the rotation axis C of the handling cylinder 18 so as to contact the processing object in the handling chamber A. A contact piece 15, a spring 16 for urging the contact piece 15 toward the handling cylinder 18, and a contact piece 1.
5 is provided with a switch 17 that is turned on in accordance with the swing of 5 over a set value. That is, when the shell culm is supplied to the handling chamber A, the contact piece 15 comes into contact with the processed material to be handled by the handling cylinder 18 and the switch 17 is turned on to detect that the shell culm is in the supply state, Further, when the supply of the shell culm to the handling room A is stopped and the switch 17 is turned off, it is possible to detect that the shell culm is not supplied.

However, although not described in detail, since the shell pieces come into contact with the contact piece 15 intermittently, the switch 17 is continuously turned off for a set time (for example, 2 seconds).
When in the state, it is determined that the state is the non-supply state.

Next, the dust valve 13 will be described. As shown in FIG. 3, a plurality of dust valves 13 for adjusting the flow of the processing object transferred rearward with the rotation of the handling drum 18 are provided. They are mounted at predetermined intervals in the front-rear direction. The dust feed valves 13 are swingably supported around the vertical axis so that the valve opening can be simultaneously changed and adjusted by driving the opening control mechanism 19 as described below. It is configured.

The opening control mechanism 19 includes a ceiling cover 14.
An operation link 20, which is disposed on the upper side and is fixed to each of the swing shafts of the dust feed valve 13, a single operation rod 21 connected to one end of the operation link 20, and is operated to expand and contract by a manual command. An actuator D that swings the two operation links 20 is configured. Also, a plurality of dust valves 1
One of the swing shaft portions 3 is provided with a potentiometer type valve opening detection sensor S3 for detecting the opening.

Incidentally, the swinging of the downstream end of the dust feed valve 13 in the rotation direction of the handling cylinder 18 toward the end of the handling chamber is referred to as swinging to the side where the valve opening is large, and conversely, the starting end of the handling chamber. Swinging to the side is referred to as swinging to the side where the valve opening is small. And, the more the opening degree of the dust valve 13 is swung to the larger side, the more quickly the processed material in the handling room can be moved to the handling room end side (see FIG. 4).

As shown in FIG. 1, the crawler traveling device 1 is configured to be driven by an output of a hydraulic traveling transmission 7 driven by an engine E, and the traveling transmission 7 is automatically driven. A shift operation can be automatically performed by a shift electric motor 8 as a shift actuator.

However, the traveling transmission 7 is operatively connected to a shift lever 9 provided on the boarding operation section 4 so that the transmission can be shifted artificially. In order to be able to give priority to the gearshift operation by the gearshift 8, the gearshift electric motor 8 is provided in a link path between the gearshift lever 9 and the traveling transmission 7.
Are linked via a friction type transmission mechanism 10. still,
In the figure, M is a mission case for the crawler traveling device 1.

The engine E, the threshing device 3 and the reaping section 5 are connected and linked via a belt tension type threshing clutch 33 and a reaping clutch 34, respectively. Then, the threshing clutch lever 31 and the reaping clutch lever 32 for manually turning on and off the threshing clutch 33 and the reaping clutch 34 respectively are mounted on the boarding operation section 4.
And a threshing switch SW1 and a reaping switch SW2 which are turned ON in accordance with their entering operation. Further, an engine speed sensor S1 for detecting the speed of the engine E is provided.

The engine speed sensor S
1. Based on the detection information of the valve opening detection sensor S3 and the hull detection sensor S4, and the operation signals of the threshing switch SW1 and the cutting switch SW2, the electric motor 8 for shifting is operated to automatically control the vehicle speed. A control device H using a microcomputer for adjusting is provided.
That is, the vehicle speed control means 100 is configured using the electric motor 8 for shifting and the control device H.

Next, a method of detecting whether or not the engine is in a load state will be described. The control device H determines that the threshing switch SW1 is ON, the shell / culm detection sensor S4 is OFF, and When the mowing switch SW2 is OFF, it is determined that there is no load, the threshing switch SW1 is ON, and the husk culm detection sensor S4 is OFF.
N, and when the reaping switch SW2 is ON, it is determined that the load is in effect.

Then, the detected rotational speed RX of the engine in the no-load state is fetched as needed, and the value is updated and stored as the reference rotational speed RS, and the difference between the detected rotational speed RX in the load operation state and the reference rotational speed RS is calculated. Is detected as the engine load. That is, the engine load detection unit 200 is configured by the engine speed detection sensor S1 and the control device H.

Next, the procedure for controlling the vehicle speed will be described with reference to the flowchart shown in FIG. First, the engine speed RX is detected based on the detection information of the speed sensor S1. Next, as described above, it is determined whether the vehicle is in the no-load state or in the load acting state. If the vehicle is in the no-load state, the detected rotational speed RX at that time is set and stored as the reference rotational speed RS. Then, after detecting whether or not a certain set time has elapsed, the process returns to the first procedure.

On the other hand, if the load is applied, the valve opening sensor S3 detects the valve opening of the dust valve 13, and based on the detected information, reduces the valve opening of the dust valve 13. Neutral and large are determined (see FIG. 4). In each case, the engine load value defined as the difference between the detected engine speed RX and the engine reference engine speed RS is based on the table shown in FIG. The gear change operation is performed. That is, the speed change operation is executed by intermittently operating the speed change electric motor 8, and the ON time and the OFF time at that time are obtained from the table.

The speed change operation when the opening is determined to be small will be described. When the difference between the detected speed RX and the reference speed RS is in the range of 40 to 70 rpm, the speed change operation is stopped as a dead zone. When the difference is within the range of 40 rpm or less, the operation ON time of the speed-changing electric motor 8 to the speed increasing side is set to 40 ms, and the operation OFF time is set when the difference is 0 to 20 rpm. 1500 ms, 2000 ms when the difference is 20 to 30 rpm, and 2500 ms when the difference is 30 to 40 rpm. That is, the smaller the engine load, the higher the speed-up operation speed.

When the difference is in the range of 70 rpm or more, the shift electric motor 8 is operated to reduce the speed.
The N time is 40 ms, and the operation OFF time is 500 ms when the difference is 70 to 85 rpm, 250 ms when the difference is 85 to 100 rpm, and 100 ms when the difference is 100 rpm or more. That is, the greater the engine load, the greater the deceleration operation speed.

In the case of a shift operation in which it is determined that the opening is neutral and the valve opening is large, the ranges of the dead zones where the shifting operation is stopped are each set to 50 to 50 in the same manner as described above.
80 rpm, 60 to 90 rpm, the speed increasing operation at the set speed when the speed is smaller than the dead zone range, the deceleration operation at the set speed when the speed is larger than the dead zone range,
This is performed based on the control table of FIG.

In each case, after the acceleration / deceleration operation is performed, it is detected whether or not a certain set time has elapsed. After that, the process returns to the first procedure, and thereafter, the control flow of FIG. 5 is repeated. is there.

[Alternative Embodiment] In the above embodiment, after the opening of the dust feed valve 13 is determined to be three stages of small, neutral and large, the speed increasing operation is performed using a different control table for each opening. And deceleration operation. However, for one or both of the speed-up operation and the deceleration operation, for example, the same control table is used when the opening is small and neutral, or the same control table is used when the opening is neutral and small. It can be used depending on the load condition.

In the above embodiment, the opening degree of the dust valve 13 is determined in three stages of small, neutral and large.
A control table for the shift operation is set for each of the stages, but the opening degree is determined in, for example, five stages other than three stages,
Finer control may be performed.

The range of the dead zone and the ratio of the operation ON time to the operation OFF time of the shift electric motor 8 during each shift operation can be set to values other than those shown in FIG. 6 depending on the load conditions.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[0040]

[Brief description of the drawings]

FIG. 1 is a block diagram of a control configuration.

FIG. 2 is a cutaway front sectional view of a handling room.

FIG. 3 is a plan view of an opening control mechanism.

FIG. 4 is a diagram showing a discrimination state of a valve opening degree of a dust valve.

FIG. 5 is a flowchart of vehicle speed control.

FIG. 6 is a control table of a shift operation.

FIG. 7 is a schematic side view of the combine.

[Explanation of symbols]

 3 Threshing device 7 Traveling transmission 13 Dust valve 100 Vehicle speed control means 200 Engine load detection means A Handling room E Engine

Claims (3)

(57) [Claims] An engine load detecting means for detecting a load on an engine, and traveling so as to maintain an engine load within a target load range based on information detected by the engine load detecting means. And a vehicle speed control means (100) for automatically performing a speed change operation of the transmission (7), wherein the vehicle speed control means (100) is provided in the threshing device (3). The target load range is set to be on the load increasing side when the opening degree is larger than when the opening degree is small, based on the opening degree information of the dust discharge valve (13) for discharging the processed material in the chamber (A). Combined vehicle speed control device. 2. An engine load detecting means (200) for detecting a load of an engine (E), and traveling so as to maintain an engine load in a target load range based on information detected by the engine load detecting means (200). And a vehicle speed control means (100) for automatically performing a speed change operation of the transmission (7), wherein the vehicle speed control means (100) is provided in the threshing device (3). A combine vehicle speed control device configured to adjust a shift operation speed based on opening degree information of a dust discharge valve (13) for discharging a processed material in a chamber (A). 3. An engine load detecting means (200) for detecting a load of the engine (E), and traveling so as to maintain the engine load in a target load range based on information detected by the engine load detecting means (200). And a vehicle speed control means (100) for automatically performing a speed change operation of the transmission (7), wherein the vehicle speed control means (100) is provided in the threshing device (3). The target load range is set to a load increasing side when the opening degree is larger than when the opening degree is small, based on the opening degree information of the dust discharge valve (13) for discharging the processed material in the chamber (A), and A combine vehicle speed control device configured to adjust a speed change operation speed.