JPH11210497A - Engine governor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine governor device which can eliminate troublesome in adjustment work, and which can cope with an appropriate rotational speed in accordance with a working condition. SOLUTION: An engine governor device comprises a motor M for driving a governor 15 in an engine, a potentiometer 19 for detecting an adjusting position of the governor 15, a set switch 20 for delivering an operation adjusting instruction for setting the adjusting position of the governor 15 to a desired operating position S through a personal manipulation, and a control device 24 for controlling the operation of the motor M so that the adjusting position of the governor 15 becomes the desired operating position, in accordance with detection data from the potentiometer 19. The desired operating position S can be optionally changed and set.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed control device for an engine mounted on, for example, a combine or other agricultural work vehicle.

[0002]

2. Description of the Related Art As a conventional speed control device for an engine, for example, a speed control device provided in the engine is provided by manually operating an operation lever provided so as to be swingable and freely held at an arbitrary position. In general, the operation position of the operating tool is changed to change and adjust the engine speed (output).

[0003] However, in such a configuration, for example, in the case of adjusting to a preset rotational speed which is set in advance as an optimal one for harvesting work in a combine or the like, the engine rotational speed indicator and the like are visually checked. It is necessary to adjust the operating lever while operating the operating lever so that the display state matches the set number of revolutions, and there is a disadvantage in that such an operation is troublesome.

Therefore, as a method of solving such disadvantages, an operation tool for speed adjustment provided in the engine is configured to be operable using an actuator such as an electric motor, and the actuator is automatically controlled. For example, with an artificial operation for starting a work such as an operation for engaging a work clutch, the adjustment position of the operation tool for speed adjustment is
A configuration was considered in which the actuator was automatically controlled so as to be at a position corresponding to a preset number of rotations.

[0005]

In the above-described improved configuration, the troublesome adjustment operation as described above is not required.
There was still room for improvement in the following aspects:

In the above configuration, the set rotation speed is set to a standard constant value, and the adjustment position of the speed adjusting operation tool is adjusted so that the operation speed always becomes the same at the start of work. Although the operation is performed, there is a disadvantage that it is not possible to cope with a case where it is necessary to change the set rotation speed (adjustment position) according to the situation of the operation by driving the engine.

[0007] The case where the engine is mounted on a combine is specifically described as an example. When a harvesting operation for harvesting seeds is performed by the combine, the harvested seeds are performed more than when a normal harvesting operation is performed. For the purpose of minimizing damage to the engine, it is preferable to perform the engine speed (that is, the speed of the threshing device or the like) at a low speed, but in the above configuration, even in such a case,
The reaping operation is performed in a state where the rotation speed is set to the standard set number of revolutions, which may cause inconvenience.

The present invention has been made in view of such a point. The object of the present invention is to solve the troublesome adjustment work based on the lever operation and the like as described above, and to solve the problem according to the work situation. Another object of the present invention is to provide a speed control device for an engine that can respond to an appropriate rotation speed.

[0009]

According to a first aspect of the present invention, there is provided an actuator for driving and operating a speed control device of an engine, and an adjustment position detecting means for detecting an adjustment position of the speed control device. A switch-type operation command means for instructing a work adjustment command for manually adjusting an adjustment position of the speed adjusting operation tool to the work target position; and Control means for controlling the operation of the actuator based on the detection information of the position detection means such that the adjustment position of the speed governor becomes the work target position; and a target capable of changing and setting the work target position. And position setting means.

When a work adjustment command is issued by manual operation of a switch-type work command means, a speed adjusting operation tool of an engine is driven by an actuator, and a speed adjustment operation is performed based on information detected by an adjustment position detecting means. The tool is automatically controlled so that the adjustment position of the tool becomes the work target position. or,
Since the work target position can be changed and set by the target position setting means, the work target position can be changed and set to a position suitable for each work content according to the work situation, for example. The adjustment position of the speed control device is automatically controlled to the changed work target position in accordance with the work adjustment command of the means.

As a result, the switch can be easily adjusted to the set number of rotations by one-touch operation without the need for a troublesome operation of adjusting the operation lever to the set number of rotations while manipulating the operation lever. Nevertheless, it has become possible to provide an engine speed governing device that can correspond to an appropriate set rotational speed according to the work situation.

According to a second aspect of the present invention, in the first aspect, a switch type idling device for issuing an idling adjustment command for manually setting an adjustment position of the speed control operating device to an idling target position. Command means is provided, and the control means sets the adjustment position of the speed control operating tool to the target position for idling based on the detection information of the adjustment position detection means in response to the instruction for the idling adjustment command. The operation of the actuator is controlled so that

When an idling adjustment command is issued by manual operation of a switch-type idling command means, a speed control operating tool of the engine is driven by an actuator, and a speed control operation is performed based on information detected by the adjustment position detecting means. The tool is automatically controlled so that the adjustment position of the tool becomes the target position for idling.

Therefore, in the case where the work load on the engine is lost and the engine is in a no-load state, driving at a high rotation speed wastes fuel and increases unnecessary noise. The engine can be brought into a low rotation state (idling state) by adjusting the idling target position by a simple operation of a one-touch operation with respect to, and the operability is improved.

According to a third aspect of the present invention, in the first or second aspect, there is provided speed adjusting means for instructing a speed change by manual operation, and the control means is provided by the speed adjusting means. Along with the speed change command, it is configured to control the operation of the actuator so as to change the adjustment position of the governing device, and the target position setting unit is configured to control the operation of the speed change command based on the setting command. It is configured to set the adjusted position changed as a target position for work.

When a speed change command is issued by a manual operation of the speed adjusting means, the operation of the actuator is controlled accordingly, and the adjustment position of the speed adjusting operation tool is changed. Then, based on the setting command, the target position setting means sets the adjusted position changed in accordance with the speed change command as a work target position.

As a result, by manually operating the speed adjusting means, the work target position can be easily changed and set to an appropriate adjustment position according to the work situation.

According to a fourth feature of the present invention, in the third feature, the target position setting means includes a storage means for storing a work target position, and the work instruction means and the speed adjustment means are provided. The adjustment position of the speed control device is changed by being operated at the same time, and with the simultaneous operation of the work command means and the speed adjustment means being stopped, the adjustment position at that time is set as the work target position. It is configured to store in a storage means.

That is, by simultaneously operating the work commanding means and the speed adjusting means, the adjustment position of the speed adjusting operation tool is changed, and by stopping the simultaneous operation, the adjustment position at that time becomes the work target. The position is stored in the storage means. Therefore, by adopting a configuration in which the operation target position can also be set and the operation target position can be set, it is possible to simplify the configuration without providing a special operation tool for performing the setting instruction and to perform the operation. It is possible to respond to the change setting of the target position with simple operation.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the engine is mounted on a traveling body of the combine and drives the devices of the combine. While it is possible to eliminate the inconvenience of the adjustment operation based on the lever operation and the like as described above, for example, when performing a harvesting operation for harvesting seed rice, the harvest is performed more than when performing a normal harvesting operation. In order to minimize damage to the seed rice, as the working target position, the engine rotation speed (that is, the rotation speed of the threshing device or the like) is changed and set so as to be the adjustment position corresponding to the position on the low rotation side. It has become possible to provide an engine speed control device in a combine which can be adapted to an appropriate engine speed according to the situation of the reaper.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a case where an engine speed controller according to the present invention is applied to a combine will be described with reference to the drawings. As shown in FIG. 6, the combine is a traveling body V equipped with a pair of right and left crawler traveling devices 1R and 1L.
A cutting unit 2 for cutting the cultivated grain culm along with the body running and transporting the cut culm backward, and the traveling body V includes a threshing device 3 for threshing the cut grain culm. And a Glen tank 4 for storing the thresh-processed grains, a driving unit 5 for a driver to board and drive, and the like.

The cutting unit 2 includes a raising device 6 for bringing the standing plant culm in a standing position to a standing position, a cutting blade 7 for cutting the root of the raised grain culm, and holding the root of the cut grain culm. It is configured to include a vertical transport device 8 and the like that transports toward the threshing device 3 while locking and transporting the tip side. At the transport start end of the vertical transport device 8, if there is a harvested culm to be transported, it is turned ON.
A stock sensor 9 that is in the FF state is provided. The stock sensor 9 functions as a work state detecting means for detecting whether the state is the harvesting work state or the non-working state.

An engine E is mounted on the combine, and each section of the machine body is driven by the power of the engine E to perform a mowing operation. That is,
As shown in FIG. 2, the power of the engine E is transmitted to the threshing device 3 via a belt transmission 10 which also serves as a belt tensioning threshing clutch, and the right and left crawlers are transmitted via a transmission 11 and a transmission case 12. A transmission system is configured so that the power transmitted to the traveling devices 1R and 1L and the power after the speed change of the transmission 11 is transmitted to the reaper 2. In the transmission case 12, steering clutches 13R and 13L capable of intermittently transmitting and receiving power to the left and right crawler traveling devices 1R and 1L, respectively, are provided.
By turning off one of the steering clutches 13R, 13L, the vehicle body can be turned.
That is, each of the steering clutches 13R and 13L is biased to a clutch engaged state, and is configured to be switched to a clutch disengaged state by a hydraulic operation by hydraulic cylinders 14R and 14L provided separately. Although not described in detail, the transmission 11 is constituted by a hydrostatic stepless transmission (HST), and a speed change operation is artificially performed in a stepwise manner in the forward and reverse directions by a vehicle speed lever provided in the driving unit 5. It is provided as possible.

The engine E is constituted by a diesel engine, and the amount of fuel injected into the combustion chamber of the engine E by a fuel injection pump (not shown) is changed and adjusted by changing the adjusting position of the speed adjusting lever 15. The output (rotational speed) can be changed. As shown in FIG. 1, the speed adjusting lever 15 is provided so as to be swingable around the axis X1 over a range from a minimum output position A (idling position) to a maximum output position F (full accelerator position). Idling position A by spring (not shown)
, And is configured to be driven by an electric motor M as an actuator. That is, a fan-shaped gear portion 17a that meshes with the small-diameter gear 16 that is driven to rotate by the electric motor M is formed.
Driving member 1 that is rotated around a set range around 2
7 is provided, and the arm 1 formed on the driving member 17 is provided.
The speed adjustment lever 15 is linked to the speed adjustment lever 15 via a link 18 so that the electric motor M drives the speed adjustment lever 15. Note that a potentiometer 19 is provided at the rotation fulcrum position of the drive member 17 as an adjustment position detection unit that detects the adjustment position of the speed adjustment lever 15 based on the amount of rotation of the drive member 17.

The speed adjusting lever 1 is manually operated.
A set switch 20 as a switch-type work command means for commanding a work adjustment command for setting the adjustment position 5 to a work target position (set position), and manually adjusting an adjustment position of the speed adjustment lever 15 to an idling target position. (Idling position), an idle switch 21 serving as a switch-type idling command means for instructing an idling adjustment command, and an up switch 22 and a down switch 23 serving as speed adjusting means for instructing a speed change by being manually operated. Each of them is provided in a state of being juxtaposed on the control panel 25 of the driving unit 5.

A control device 24 using a microcomputer is provided. The control device 24 includes a motor control means 100 as a control means for controlling the operation of the electric motor M, and the work target position can be changed and set. The target position setting means 101 is provided in the form of a control program.

The motor control means 100 controls the operation of the electric motor M based on the detection information of the potentiometer 19 so that the adjustment position of the speed adjustment lever 15 is set to the set position in response to a work adjustment command. Control, and the operation of the electric motor M is controlled so that the adjustment position of the speed adjustment lever 15 becomes the idling position as the idling adjustment command is issued, and the speed change command is issued by the up switch 22 and the down switch 23. Thus, the operation of the electric motor M is controlled to change the adjustment position of the speed adjustment lever 15.

Further, a memory 26 is provided as storage means for storing information on the target position for work (set position) and information on the target position for idling (idling position). It is configured such that it can be changed and set based on an artificial operation by the pilot. When the target position setting means 101 simultaneously operates one of the up switch 22 or the down switch 23 and the set switch 20, the adjustment position changes, and when the simultaneous operation is stopped, The adjustment position at that time is rewritten and stored in the memory 26 as a new set position. When one of the up switch 22 or the down switch 23 and the idle switch 21 are simultaneously operated, the adjustment position is changed. When the simultaneous operation is stopped after being changed, the adjustment position at that time is rewritten and stored in the memory 26 as a new idling position.

The control device 24 includes, as shown in FIG.
In addition to the operation control of the electric motor M (control for controlling the speed of the engine E), a hydraulic control valve 28 for each of the hydraulic cylinders 14R and 14L is operated in accordance with an operation of a steering lever 27 provided in the operating unit 5. It is configured to execute vehicle body steering control for switching control. That is, the steering lever 27
Is provided with a pair of turning switches 29R and 29L (turning state detecting means) for detecting that the vehicle has been operated in one of the left and right directions in which the vehicle body should turn.
When the levers 9R and 29L detect a lever operation, the hydraulic control valve 28 is switched and controlled to turn off the steering clutches 13R and 13L corresponding to the inside of the turning, thereby turning the vehicle body.

A rotational speed detecting sensor 30 (rotating speed detecting means) for detecting the rotational speed of the engine E is provided, and the control device also detects information from the rotational speed detecting sensor 30 and information from the stock sensor 9. The control device 24 is turning with the turning switches 29R and 29L after the detection result of the stock sensor 9 is switched from the reaping work state to the non-working state. Is detected, and when it is detected that the value detected by the rotation speed detection sensor 30 is lower than a preset engine no-load rotation speed by a set amount or more, the engine E is in a high load state. And the adjustment position of the speed adjustment lever 15 is changed from the set position “S” to the full accelerator position “F”.
, The operation of the electric motor M is controlled.

For example, as shown in FIG. 3, when the vehicle body is turned after the reaping operation in one stroke is completed, the load on the engine E suddenly increases. Is designed to temporarily raise the output of the engine E to the full accelerator position to prevent the engine from stopping or the like.

Next, the control operation of the control device 24 for controlling the speed of the engine will be described with reference to a control flowchart. As shown in FIGS. 4 and 5, when the set switch 20 and the up switch 22 are simultaneously operated, the operation of the electric motor M is controlled so that the speed adjusting lever 15 is operated to the high rotation side (full accelerator position side). When the simultaneous operation is stopped, the adjustment position at that time is set and stored as a set position (steps 1 to 5). When the set switch 20 and the down switch 23 are simultaneously operated, the operation of the electric motor M is controlled to operate the speed adjusting lever 15 to the low rotation side (idling position side), and when the simultaneous operation is stopped. ,
The adjustment position at that time is set and stored as a set position (steps 6 to 9). When only the set switch 20 is operated, the operation of the electric motor M is controlled so that the set position stored at that time is set (step 10). Also, the idle switch 21 and the up switch 2
2 are simultaneously operated, the operation of the electric motor M is controlled to operate the speed adjustment lever 15 to the high rotation side (full accelerator position side). When the simultaneous operation is stopped, the adjustment position at that time is changed. The idling position is set and stored (steps 11 to 15). When the idle switch 21 and the down switch 23 are simultaneously operated, the speed adjustment lever 15
The operation of the electric motor M is controlled to operate the motor on the low rotation side (idling position side). When the simultaneous operation is stopped, the adjustment position at that time is set and stored as the idling position (steps 16 to 19). When only the idle switch 21 is operated, the operation of the electric motor M is controlled so that the idling position stored at that time is set (step 20). In addition, during normal mowing work, the work is performed by operating the set position.
In a standby state or the like in which the harvesting operation has been completed, the operation is performed to the idling position. The set position initially set at the stage of shipment from the factory is an adjustment position corresponding to the rated speed of the engine E.

After the stock sensor 9 is switched from the ON state (cutting work state) to the OFF state (non-working state), for example, at the edge of a ridge, a set time (number) required to reach the turning position is reached. Seconds to 10 seconds), one of the turning switches 29R and 29L is turned off.
N, the turning state is detected, and the detected value Nx of the engine speed at that time is the no-load speed N, which is preset as the speed in the no-load condition for the engine E.
It is down more than the set amount (150 rpm) from _SET ,
If it is determined that the engine E is in the high load state, the adjustment position of the speed adjustment lever 15 is operated from the set position to the full accelerator position (steps 21 to 24). Thus, the stop of the engine E or the like due to the high load is prevented beforehand.

[0034] Then, whether strains based sensor 9 is switched to the ON state (Reaper working state), or the detection value Nx of the engine speed, the amount of down set amount from the idling speed N _SET (70 rpm) or less If so, the adjustment position of the speed adjustment lever 15 is returned to the set position (steps 25 and 2).
6, 27), a mowing operation is performed at the set position.

[Another Embodiment] (1) In the above embodiment, the idle switch 21 is provided. However, instead of such a configuration, such special operation means may not be provided. A configuration may be adopted in which the speed adjustment lever 15 is controlled to automatically return to the idling position in conjunction with the clutch disengagement operation or the like.

(2) In the above embodiment, the change of the set position is set by the simultaneous operation of the set switch 20 and the up switch 22 or the down switch 23. Instead of such a structure, the set position is changed. It is good also as composition provided with the operation tool only for change adjustment.

(3) In the above-described embodiment, the up switch 22 and the down switch 23 are provided as the speed adjusting means. However, instead of such a switch-type operating means, the swing operating lever is operated. Potential meter type speed adjusting means may be used.

(4) In the above embodiment, the speed adjusting lever 15 is directly driven and operated by the actuator as a speed adjusting operation tool of the engine. However, instead of such a configuration, the following configuration may be employed. Good. In other words, an operation lever (accelerator lever) interlockingly linked to the speed adjusting lever 15 so as to be capable of holding the position by a frictional holding mechanism against the return urging force is provided to be swingable by manual operation. It is also possible to adopt a configuration in which the speed can be artificially adjusted by the operation lever, and the speed of the engine is adjusted by driving the operation lever in the forward and reverse directions by the actuator.

(5) In the above-described embodiment, the case where the present invention is used for controlling the speed of the engine E mounted on the combine is exemplified. However, the present invention is not limited to such a configuration, and other agricultural work vehicles such as a tractor or the like may be used. It may be applied to a working vehicle such as a machine.

[Brief description of the drawings]

FIG. 1 is a control block diagram.

FIG. 2 is a diagram showing a transmission system of a combine.

FIG. 3 is a plan view showing a work traveling state.

FIG. 4 is a control flowchart.

FIG. 5 is a control flowchart.

FIG. 6 is an overall side view of the combine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 15 Governing operation tool 19 Adjustment position detection means 20 Work instruction means 21 Idling instruction means 22, 23 Speed adjustment means 26 Storage means 100 Control means 101 Target position setting means E Engine M Actuator

Claims (5)

[Claims] 1. An actuator for driving a speed control device of an engine, an adjustment position detecting means for detecting an adjustment position of the speed control device, and a work target for manually adjusting an adjustment position of the speed control device. A switch-type work command means for commanding a work adjustment command to be brought to a position, and, along with the work adjustment command being commanded, based on the detection information of the adjustment position detection means, An engine governing device comprising: control means for controlling the operation of the actuator so that the adjustment position becomes the work target position; and target position setting means capable of changing and setting the work target position. 2. A switch-type idling instruction means for instructing an idling adjustment instruction for manually adjusting an adjustment position of the speed adjusting operation tool to an idling target position, wherein the control means comprises: When the command is issued, the operation of the actuator is controlled based on the detection information of the adjustment position detection means so that the adjustment position of the speed control operating tool becomes the target position for idling. The engine governing device according to claim 1, wherein: 3. A speed adjusting means for instructing a speed change by an artificial operation, wherein said control means changes an adjustment position of said speed adjusting operation tool according to a speed change command from said speed adjusting means. The target position setting means is configured to set the adjustment position changed according to the speed change command as the work target position based on a setting command. The engine speed governing device according to claim 1 or 2, wherein: 4. The target position setting means includes a storage means for storing the work target position, and the work instruction means and the speed adjusting means are operated at the same time, so that the speed adjusting operation tool is controlled. The adjustment position is changed, and with the simultaneous operation of the work command unit and the speed adjustment unit being stopped, the adjustment position at that time is set as the work target position, and the storage unit is set in the storage unit. 4. The engine governing device according to claim 3, wherein the device is configured to store the information. 5. The engine governing device according to claim 1, wherein the engine is mounted on a traveling body of the combine to drive a device of each part of the combine.