JP2001016955A - Accelerator controlling type combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the engine load at the time of turning and make the speed of an engine easily retainable at the rating in an accelerator controlling type combine harvester equipped with an air conditioner device. SOLUTION: This accelerator controlling type combine harvester is equipped with an accelerator lever for raising and lowering the engine speed to the target speed and a travel lever for increasing or reducing the car speed and is capable of automatically regulating the engine speed by interlocking the travel lever with the accelerator lever. The combine harvester is provided with an air conditioner device and further a grain culm sensor for detecting whether the combine harvester is during reaping operations or turning operations. The operation of the air conditioner device is turned off when the transfer of the combine harvester during the reaping operations to the turning operations is detected with the grain culm sensor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator control type combine which reduces an engine load during a circulating operation.

[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]

By the way, when the combine circulates (that is, turns), the load on the engine increases, and even if the accelerator control is activated, the engine speed may not return and may fall below the rated value. . If the number of revolutions of the engine falls below the rating, a problem occurs that the sorting ability, which is the life of the combine, is reduced. In particular, in the case of wetlands, the problem appears remarkably. In recent years, the number of combines equipped with an air conditioner has increased, and in such a combine, the operation of the air conditioner consumes about several horsepower, so that the load on the engine becomes very large. ing. The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to reduce an engine load at the time of circling, particularly in an accelerator control type combine equipped with an air conditioner device. Another object of the present invention is to make it easier for the engine speed to be maintained at a rated value.

[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. In an accelerator control type combine that automatically adjusts the engine speed by linking the accelerator lever operating means with the traveling lever operating means, the air conditioner device is provided,
A sensor for detecting whether the combine is in a harvesting operation or in a revolving operation, and operating the air conditioner device when the sensor detects that the harvesting operation of the combine has shifted to a recirculating operation. Is turned off.

[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 crawler a of the combine, a crawler drive shaft b, a cutting unit c, a feed chain d for feeding the cut culm to the threshing machine while conveying the cut culm, and a grain for storing the threshed grain. It has a tank e and an auger f for discharging the stored grains outside the machine. The upper driver's seat is air-conditioned by an air conditioner device (not shown).

FIG. 2 is a layout view of switches on the driver's seat of the combine according to the present invention. A traveling lever (hereinafter, referred to as an HST lever) 1 tilts 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 increases in the forward direction, and when the vehicle is tilted backward, the vehicle moves in the reverse direction. Speed up.
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 it backward to open the throttle and raise the engine speed, and tilt it forward 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 mechanism that links an accelerator lever 2 that raises and lowers the engine speed with an HST lever 1 that increases and decreases the vehicle speed to keep the engine speed at a rated value.

FIG. 3 shows a block diagram of the accelerator control mechanism. The accelerator control mechanism includes an accelerator automatic switch 51 for selecting accelerator control via the input interface 5a on the input side of the CPU 5, an engine rotation sensor 52,
The accelerator lever position sensor 53 and the HST lever position sensor 54 are connected, and the accelerator lever opening / closing motor 57 is provided on the output side via the output interface 5b.
And the HST lever increase / decrease motor 58 is connected. The accelerator control mechanism is configured as described above. When the accelerator automatic switch 51 is on, the accelerator automatic control mode is set to an automatic accelerator adjustment mode.
A reference operation range of the accelerator lever 2 for automatically operating the accelerator lever 2 following the HST lever 1 is set. Then, in the accelerator automatic adjustment mode, a target value of the engine speed is set based on the sensor values of the accelerator lever position sensor 53, the HST lever position sensor 54, and the engine speed sensor 52, and the current engine speed is set to the target value. The accelerator lever opening / closing motor 57 is output to adjust the accelerator position value so that the value matches the reference operation range.

The accelerator control mechanism further includes a grain culm sensor 55 and a vehicle speed sensor 56, and determines whether or not a mowing operation is being performed based on detection of signals from these sensors. 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. Then, when the vehicle speed sensor 56 detects that the vehicle has traveled a predetermined distance or that a predetermined time has elapsed after detecting the end of the mowing, it is determined that the combine has shifted from during the mowing operation to the traveling state. . When it is detected that the air conditioner has shifted to the circulating state, the operation of the air conditioner device is turned off, and after a lapse of a predetermined time, the operation of the air conditioner device is turned on and restarted. FIG. 4 is a time chart showing the correspondence between ON / OFF of the grain stalk sensor 55 and ON / OFF of the air conditioner device. Thereafter, in the same manner, the operation of the air conditioner device is turned off every time it is detected that the combine has shifted to the circulating state, the air conditioner device is returned after a predetermined time has elapsed, and this operation is repeated.

The predetermined distance or the predetermined time when the vehicle speed sensor 56 detects that the vehicle has traveled a predetermined distance or that a predetermined time has elapsed after detecting the end of mowing is set arbitrarily. For example, the distance is about 10 m and the time is about 10 seconds. In addition, when it is detected that the air conditioner has shifted to the circulating state, the operation of the air conditioner device is turned off, and then after a certain period of time, the operation of the air conditioner device is turned on and restarted. It can be set arbitrarily as long as it is during the time until the culm sensor 55 switches from off to on next time (see FIG. 4).

According to the present invention, when the combine is rotating, the operation of the air conditioner device is turned off, so that the power consumed in this operation is omitted, and the load on the engine is reduced accordingly. , The rotation speed of the engine can be easily maintained at the rated value, especially during circulating when the load on the engine becomes large. Next, an accelerator control mechanism of a combine for selectively idling the engine will be described in connection with the present invention.

This accelerator control mechanism selects the condition and idles the engine when the vehicle is not working and when the vehicle is stopped. The condition is that when the accelerator automatic switch 51 is turned off, the parking brake (shown in FIG. ), Or when the sub-shift lever 4 (see FIG. 2) is
This is to automatically return the engine to idling in response to an operation when returning from a position such as low speed to a neutral position (neutral). Conventionally, idling was not achieved unless the accelerator lever was returned. However, such an accelerator control mechanism can quickly return to idling, suppress unnecessary rotation, reduce noise, and save fuel. It is to be noted that idling at all times when the vehicle is stopped during non-working time may impose excessive effort on the traveling device depending on the degree of traveling load at the next start, and may cause engine stalls. However, there is an advantage that such a trouble does not occur by selecting the conditions and idling even when the vehicle is stopped.

Next, a description will be given of an accelerator control mechanism of the combine which sets the engine speed to a speed lower than the rated speed by a predetermined operation when the vehicle is not working and the vehicle is stopped, in relation to the present invention. This accelerator control mechanism is used when the accelerator automatic switch 51 is switched from off to on, when the parking brake (not shown) is released, or when the auxiliary shift lever 4 (see FIG. 2) is inactive and when the vehicle is stopped. Set the engine speed to a preset speed, which is higher than the idling speed and lower than the rated speed, in accordance with the operation when moving from the position (neutral) to the movement mode such as high speed, standard or low speed position. , Let the engine run. According to such an accelerator control mechanism, the accelerator automatic switch 51 is switched from off to on, the parking brake is released, or the auxiliary transmission lever is switched from the neutral position (neutral) to the movement mode when the vehicle is not working and the vehicle is stopped. The start of the next run is determined by the operation, and the engine speed is increased from the idling state to a speed lower than the rated speed, so that the running device can be smoothly run at the time of starting without applying excessive force to the running device.

Next, the accelerator control mechanism of the combine which controls the engine speed to be rated while the HST lever is operated forward or backward will be described in connection with the present invention. FIG. 5 is a flowchart of the accelerator control mechanism. The process is started, and it is determined whether or not the engine speed is 500 rpm or more (step 6).
1) If so, it is determined whether or not the accelerator automatic switch is turned on (step 62). If the accelerator automatic switch is turned on, it is determined whether the operation position of the HST lever is forward or backward (step 6).
3) If it is detected that the vehicle is moving forward or backward, it is determined whether or not the vehicle can be positioned at the highest speed (step 6).
4). If it is positioned at the highest speed, it is determined whether the change is in the accelerator opening direction (step 65), and if so, the accelerator full-open timer is set (step 66), and then the accelerator opening is output (step 69). If the result of step 65 is negative, it is determined whether or not the accelerator fully open timer is up (step 67), and if not, the accelerator open is output in step 69. On the other hand, if the result of step 64 is negative, the engine speed is 2800 r.
pm is determined (step 68). If not, an accelerator opening is output in step 69. And
It is determined whether or not the engine speed has dropped below 2800 rpm (step 70), and if not, an accelerator close is output (step 71).

That is, when the automatic accelerator switch is turned on,
When it is detected that the HST lever is operated forward or backward when the engine speed is 500 rpm or more, an accelerator opening or accelerator closing output is performed so that the engine speed is rated, and then the HST
Until the lever is moved to the neutral position, the engine speed is controlled to be maintained at the rated value. The accelerator control type combine is designed to automatically position and maintain the engine speed at the rated value with threshing, but in other cases, for example, when driving on the threshing road, the operator manually operates the accelerator by operating the accelerator. Had to be set. According to this embodiment, it is possible to eliminate the above-mentioned troublesomeness of the operator, quickly set the engine state suitable for road running from the threshing operation, and maintain the engine state, thereby always enabling stable running. Next, in connection with the present invention, an accelerator control mechanism of a combine that brings the accelerator to the fully open position when the operation position of the HST lever is positioned at the highest speed when threshing is not performed with threshing is described.

FIG. 6 is a flowchart of the accelerator control mechanism. When the process is started, it is first determined whether or not the engine speed is 500 rpm or more (step 8).
1) If it is 500 rpm or more, it is determined whether or not the accelerator automatic switch is turned on (step 82). If it is on, it is determined whether or not the threshing switch is turned on (step 8).
3). Then, it is determined whether or not the operation position of the HST lever is positioned at the highest speed in the threshing operation (step 84).
Is turned off (step 85). If the cereal stalk sensor (front) is off and the cereal stalk sensor (rear) is on (step 86), it is determined whether the cereal stalk sensor (rear) has been switched from on to off (step 87). Once
A certain time is set by the threshing monitoring timer (step 8)
8). When the timer is up (step 89), if the accelerator is in the opening direction (step 90), the accelerator full-open monitoring timer is set (step 92), and the accelerator opening is output.
(Step 93). If the accelerator is not in the opening direction in step 90, it is determined whether or not the timer is fully opened (step 91). If the timer is not up in step 93, the accelerator opening is output.

That is, in the present embodiment, when the accelerator automatic switch is turned on and the engine speed is 500 rpm or more, the threshing switch is turned on, the grain culm sensor (front) is turned off, and the operating position of the HST lever is positioned at the highest speed. Detect whether it has been done. Then, it detects that it has been positioned at the highest speed, the cereal stalk sensor (after) is switched from on to off, and then until a certain time elapses, that is, until the time required for the end of threshing of the cut culm elapses Is to automatically perform an accelerator opening operation so that the engine rotation is rated and then the accelerator is fully opened.

Conventionally, when the accelerator control is performed, the throttling of the engine is maintained at the optimum rated rotation speed in any case when threshing is performed. However, according to the present embodiment, the threshing is temporarily stopped to affect the threshing. In the absence state, the vehicle can run at full speed, which is advantageous, for example, when the loading tank is full and the vehicle quickly moves to a place where a truck is located.

[0018]

As described above in detail, according to the accelerator control type combine of the present invention, the air conditioner device is provided, and it is detected whether the combine is in a harvesting operation or a reciprocating operation. A sensor is provided, and the operation of the air conditioner device is turned off when the sensor detects that the harvesting operation of the combine has shifted to the circulating operation. In this case, the engine load can be reduced, and the rotation speed of the engine can be easily maintained at the rated value even during circling.

[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 the combine according to the present invention.

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

FIG. 4 is a time chart showing the correspondence between ON / OFF of a grain stalk sensor and ON / OFF of an air conditioner device in the present invention.

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

FIG. 6 is a flowchart of an accelerator control mechanism according to another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 HST lever 2 accelerator lever 3 power steering lever 4 auxiliary speed change 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 accelerator lever opening and closing Motor 58 HST lever increase / decrease motor a Combine crawler b Crawler drive shaft c Cutting unit d Feed chain e Grain tank f Auger

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) F02D 45/00 314 F02D 45/00 314M F term (reference) 2B076 AA03 DD02 EA01 EB01 EC11 ED30 3G084 AA07 BA00 BA03 BA05 BA36 CA00 DA11 EA11 EB12 EC01 EC03 FA00 FA04 FA05 FA10 FA33 3G093 AA09 BA02 CB00 CB09 DA01 DA06 DB00 DB05 DB22 EA00 EA03 EA09 FA04 3G301 HA28 JA04 KB00 KB06 LA00 LA01 ND01 PA11Z PE01Z PF01Z PF03Z PF15Z

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. An accelerator control-type combine that automatically adjusts the rotation speed is provided with an air conditioner device, and a sensor that detects whether the combine is in a harvesting operation or a revolving operation, and the sensor is the combine. An accelerator control type combiner characterized in that the operation of the air conditioner device is turned off when it is detected that a transition from the harvesting operation to the reciprocating operation is performed.