JP2885534B2 - Tractor work equipment control mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control mechanism for a working machine such as a rotary tilling device mounted on a tractor.

[0002]

2. Description of the Related Art A conventional tractor work machine control mechanism is constructed as described in Japanese Patent Application Laid-Open No. 58-20524. That is, the pressing force applied to the top link portion of the three-point link type working machine mounting device presses the draft sensor rod biased by spring, and the draft sensor rod mechanically moves the hydraulic valve for lifting and lowering the working machine. By switching, the work machine is raised when the traction force is large, and the work machine is lowered when the traction force is small, so that the draft force is controlled to be constant.

[0003]

According to the present invention, instead of mechanically moving a sensor rod and performing feedback mechanically as in the above-described prior art, detection is performed electronically by an electronic governor mechanism, and electromagnetic waves are detected. The work implement elevating valve constituted by the switching valve and other feedback mechanisms are also switched. As a result, the mechanical parts such as the sensor rod, which are conventionally configured mechanically, can be eliminated, and the work machine control mechanism of all tractors can be configured by an electronic circuit.

[0004]

The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described. In claim 1, inside the hood of the tractor
The engine E is mounted on the
Detection sensor 1, rack position sensor 2, and rack actuator
Governor mechanism composed of data 9 and electronic control unit G
A, and a rack position sensor for the electronic governor mechanism A.
2 is also used as the detection load factor FS,
A work machine control panel 15 is arranged on the side of the seat.
Load factor setting for setting the load factor of the work equipment on the control panel 15
Device 6 was installed, and a work machine was attached to the rear of the tractor.
Tilling cover that covers the outer circumference of the tilling claw of the ground tilling device R
21 and the rear cover 22 are configured to be rotatable back and forth,
The detected load factor FS is set within the set range of the set load factor F.
, The till cover 21 and the rear cover of the rotary tiller R
22 is configured to be controlled to rotate back and forth . Contract
In claim 2, the engine is installed inside the hood of the tractor.
The engine E is mounted on the side of the engine E.
Rack 1, a rack position sensor 2, and a rack actuator 9.
An electronic governor mechanism A composed of an electronic control unit G is attached.
And the detection of the rack position sensor 2 of the electronic governor mechanism A.
The value is also used as the detection load factor FS, and the tractor seat side
The work machine control panel 15 is disposed in the
The load factor setting device 6 for setting the load factor of the work equipment
Rotary plow mounted as a working machine behind the tractor
Equipped with lift elevating solenoid valves V1 and V2 for raising and lowering the tiller R
When the detected load factor FS is within the set range of the set load factor F,
Control the lift elevating solenoid valves V1 and V2 so that
It raises and lowers the industrial machine . In claim 3, the tiger
The engine E is mounted inside the hood of the
The rotation speed detection sensor 1 and the rack position sensor
2 and rack actuator 9 and electronic control unit G
Electronic governor mechanism A attached to the electronic governor mechanism
Let the detected value of the rack position sensor 2 of A be the detected load factor FS
Work equipment control panel 1 on the side of the tractor seat
5 and the load factor of the work machine is displayed on the work machine control panel 15.
And a load factor setting device 6 for setting the
Of the rotary tiller R mounted as a working machine
And the non-working state is determined, and in the working state, the engine
When the load ratio of E is constant, the rotation speed of the engine E fluctuates.
In the business state, the engine E has a constant rotational speed and the load ratio
The electronic governor mechanism A is controlled in a state where fluctuates .

[0005]

Next, the operation of the present invention will be described. In the technique of claim 1, during the tillage operation by the rotary tillage device, even if the load factor of the engine fluctuates, the lift elevating solenoid valves V1 and V2 are not moved, and the tillage depth remains constant.
Then, instead of raising and lowering the tillage depth, the tillage rotation cover 21
Then, the rear cover 22 is rotated back and forth to change the tilling load factor for the tilling claws, thereby increasing or decreasing the engine load factor. According to the second aspect of the present invention, the hydraulic switching valve is controlled by the mechanical sensor mechanism provided at the top link of the conventional draft control mechanism and the feedback mechanism formed by the link and the arm. However, in the case of the present invention, the detected load factor F
The detection of S is also performed by the rack position sensor 2 of the electronic governor mechanism A, the load factor is set by the load factor setting device 6, all signals are obtained as electronic signals, and the draft control is enabled. Originally, the electronic governor mechanism A is an electronic control mechanism for automatically controlling the number of revolutions and the load factor of the engine E and the fuel supply amount. The present invention uses the electronic governor mechanism A as a control component for draft control. By using it as a part, a draft control with a simple structure and all of it was made electronic. Claim 3
In the technique of (1), when the working machine shifts from the working state to the non-working state, the load on the working machine changes, so that the operator needs to operate the accelerator lever 14. The configuration is such that the load ratio is controlled constant in the state and the engine speed is controlled constant in the non-working state, so that the operator does not need to operate the accelerator lever 14 when changing the working state.

[0006]

Next, embodiments of the present invention will be described. 1 is a side view of a tractor equipped with a rotary tilling device as a working machine, FIG. 2 is a side cross-sectional view of an electronic governor mechanism A, FIG. 3 is a side view of the electronic governor mechanism A, and FIG. Drawing showing an example of the map, FIG. 5 is a hydraulic circuit diagram of a working machine lifting mechanism B having lift lifting / lowering solenoid valves V1 and V2.

Referring to FIG. 1, the structure of the tractor will be described.
An engine E is disposed inside the hood of the tractor, and an electronic governor mechanism A is attached to a side surface of the engine E. An accelerator lever 14 for setting the number of revolutions of the engine E by an operator is rotatably supported by a dashboard portion of the hood, and an accelerator lever sensor 5 is disposed at a base of the accelerator lever 14. The accelerator lever sensor 5 detects how much the operator has turned the accelerator lever 14 and how much rotation speed the operator desires to set. A work machine control panel 15 is provided on the side of the tractor seat. The work machine control panel 15 includes an automatic / manual changeover switch 8 for switching between automatic control and manual control of the work machine. And a work implement position setter 7 for setting the position of the work implement during position control. In addition, the rotary tiller R mounted on the rear of the tractor is provided with a tillage depth sensor 4 for detecting the tillage depth during the depth control of the working machine. The rear cover 22 is configured to be rotatable back and forth. Further, a lift angle sensor 3 is arranged at the base of the lift arm 13 for position control.

The electronic governor mechanism A will be described with reference to FIGS. The electronic governor mechanism A is attached to a side surface of the engine E, and the magnetic rotating body 12 is fixed to a cam shaft 16 of the fuel pump. The rotation of the camshaft 16 is detected by the rotation speed detection sensor 1 of the magnetic rotator 12 to obtain the engine rotation speed. The fuel supply amount of the electronic governor mechanism A is adjusted by moving the fuel rack 10 from side to side. It is the rack actuator 9 that drives the fuel rack 10 based on the control command signal. Further, the fuel rack 10 moved by the rack actuator 9
The rack position sensor 2 detects the position of the vehicle and detects the fuel supply amount. A rack bar 11 connected to a fuel rack 10 is inserted through the rack position sensor 2 and the rack actuator 9. In claim 2 of the present invention, the rack position sensor 2 is also used as a draft sensor.

Next, a control curve of the engine E by the electronic governor mechanism A will be described with reference to FIG. In the engine E, the engine output and the shaft torque are determined by the injection amount and the injection timing of the fuel injection pump and the engine speed. The fuel injection amount is adjusted by sliding the fuel rack 10 by the rack actuator 9. And it is obtained by measuring the injection amount based on the position of the fuel rack 10 and the engine speed. The injection timing is adjusted by a timing adjustment actuator (not shown). The engine speed is detected by a speed detection sensor 1. Accelerator lever 1 for operator in electronic control unit G
By rotating the rotation 4, an instruction of the number of rotations is issued via the accelerator lever sensor 5. As the electronic control unit G, a microcomputer is used, and a program ROM storing a control program is arranged. In addition, a data ROM storing various data required for control calculation such as speed fluctuation rate characteristics is arranged.

In the data rom, what is the set value of the engine speed arbitrarily set according to the position of the accelerator lever 14 operated by the operator himself and the actual speed (actual value) according to the load. Such a speed variation characteristic is stored in the form of an arithmetic expression or a numerical table for each different work content. Regarding the speed fluctuation rate, the set value and the actual value of the period rotation speed are recognized, then the mode set by the operator is recognized, and the target rack position to be set is calculated by the droop rate map according to the mode. . A signal for changing the actual rack position to the corrected target rack position is output to the rack actuator 9, the fuel rack 10 is automatically adjusted, and the operation is performed within a predetermined speed fluctuation range. Normally, in order to recognize a predetermined speed fluctuation, control is performed according to the map d of the droop control in FIG. 4, the fuel rack 10 is changed, and the shaft torque is changed. That is, the engine speed fluctuates up and down to keep the load factor constant.

The speed variation characteristic is selected according to the mode of the work content. When constant speed operation is required,
A constant rotation operation is performed along the map i of the isochronous control to increase or decrease the fuel consumption and to keep the engine speed constant. In addition, even in the case of isochronous control, especially in the case of special work, when the load increases and it is close to the maximum shaft torque, the reverse droop that increases the rotation speed and the shaft torque to prevent engine stall. It is also possible to select a control map r.

FIG. 5 shows a hydraulic circuit diagram of the work implement lifting mechanism B. The lift arm 13 is turned up and down by the expansion and contraction of the hydraulic cylinder 20,
Is provided with a lift angle sensor 3 for detecting the position. The lift hydraulic control valves V1 and V2 control the pressure oil to the hydraulic cylinder 20, and are constituted by a lift electromagnetic valve V1 and a downward magnetic valve V2. A signal for switching between the ascending solenoid valve V1 and the descending solenoid valve V2 is transmitted from the lift electronic control unit C.

FIG. 6 shows an electronic control unit G of the electronic governor mechanism A.
6 is a diagram illustrating movements of a detection signal and a command signal between a lift electronic control unit C and a work implement elevating mechanism B. In FIG. 6, an electronic governor mechanism A including a rotation speed detection sensor 1, a rack position sensor 2, a rack actuator 9, and an electronic control unit G, a lift elevating solenoid valve V1, V2,
It has an accelerator lever sensor 5, a load factor setting device 6, and a lift angle sensor 3, and the detected load factor FS detected by the electronic control unit G in the working state is equal to the set load factor F set by the load factor setting device 6. This is a technique for controlling the lifting and lowering of a work machine so that the working machine falls within a set range. As shown in FIG. 6, signals are communicated between the electronic control unit G and the lift electronic control unit C of the electronic governor mechanism A, and signals are also transmitted between the lift electronic control unit C and the work implement elevating mechanism B. Being communicated. The essential part of the present invention is that the signal of the electronic governor mechanism A can be used as a control signal of the work implement elevating mechanism B. That is, the electronic governor mechanism A and the work implement elevating mechanism B are connected via the lift electronic control unit C.

Next, the technique of claim 1 will be described with reference to FIG. FIG. 7 is a drawing showing a control mechanism for moving the rear cover 22 and the tillable rotation cover 21 of the rotary tillage device R back and forth based on the increase and decrease of the engine load factor. That is, the set load factor F
On the other hand, when the engine load factor detected by the rack position sensor 2 increases or decreases, it is intended to respond by moving the tillage rotation cover 21 back and forth instead of moving the rotary tillage device R up and down. . Since the rotary tilling device R is not moved up and down, the tilling depth is constant and the rear cover 22
Need only be rotated back and forth.

Next, the second aspect of the present invention will be described with reference to FIGS. FIG. 8 is a control block diagram for position control, and FIG. 9 is a control block diagram for draft control. In the case of performing the position control in FIG. 8, the position setting device 7 is set by the rotation of the position lever 7a, and the one-touch elevating switch 18 provided on the dash board portion of the tractor is used at once at the time of the field end circulation. Ascent is possible. Further, the raising height by the one-touch lifting switch 18 can be set by a raising height dial 18a. When the mode is switched by the automatic / manual switch 8 and the set height is designated by the position lever 7a or the lifting height dial 18a, the lift lifting / lowering solenoid valves V1 and V2 are switched, and the lift arm 13 rotates up and down. The lift angle sensor 3 detects the rotation angle. Then, the working machine is made to converge to the set height.

Next, the case of the draft control will be described. In this case, the set load factor F is set by the load factor setting device 6. Then, the set load factor F is substantially equal to the detected load factor FS detected by the rack position sensor 2,
The switching control of the lift lifting / lowering solenoid valves V1 and V2 is performed.
In the second aspect of the present invention, the main part is that the draft control sensor is changed from a conventional mechanical sensor to the rack position sensor 2 and detected as an electronic signal.

Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a control block diagram showing constant load factor control and constant rotation control, FIG. 11 is a control flowchart, and FIG. 12 is a control state. The switching point between the working state and the non-working state may be determined by the lift angle sensor 3 or may be determined based on the magnitude of the load factor. Based on the detection by the work / non-work detector 23, a control command is issued to the electronic governor mechanism A to perform constant load factor control for draft control in the work state, and to reduce the load in the non-work state. Therefore, if the load factor is fixed, the rotational speed abnormally increases, and the load factor may fluctuate. Therefore, the control is changed so that the rotational speed is constant. FIG. 11 shows a flowchart of the constant load factor control and the constant rotation speed control after the determination by the work / non-work detector 23. FIG. 12 shows a state in which the constant number of revolutions during the non-operation changes. That is,
In the non-working state in the upper position where the work machine is not in contact with the ground, the engine speed is controlled to a constant speed at a low position,
At a position close to the ground when the rotary tilling apparatus R is lowered, the set rotation speed is set to a high rotation speed.

FIG. 13 shows that the plowing depth position sensor 4 provided on the rear cover 22 is also a depth sensor, the engine load factor is detected by the rack position sensor 2 to be a draft sensor, and the two are overlapped and used as a lift elevating solenoid valve V1.
A control block diagram for controlling V2 is disclosed. In addition, although both sensors are used in combination, it is usually preferred that the working machine is moved up and down based on the detection value of the tillage depth position sensor 4 and when the load of the engine E increases, the detection of the tillage depth position sensor 4 Regardless of the value, the lift elevating solenoid valves V1 and V2 are configured to be controlled such that the set load ratio is achieved. Further, when the load factor decreases, the control by the tillage depth position sensor 4 is switched. In addition, when the draft control is activated due to the load of the engine, and the number of times of lifting and lowering of the working machine exceeds a certain number within a certain time,
It is configured to display by an overload indicator.

FIG. 14 is a diagram showing control for controlling the speed when the work machine is installed on the ground.
In this case, such as at the end of the field, the engine load gradually becomes the set load factor F after the lowering operation of the work implement,
It controls the lowering speed of the work machine. Thus, it is possible to prevent the sudden load fluctuation of the engine E from occurring when the work machine is lowered.

FIG. 15 is a flowchart in the case where the vehicle speed of the tractor is simultaneously controlled by the electronic governor mechanism A, and FIG. 16 is a control block diagram similarly. In this configuration, the speed is set by the speed setting device 25, the rotation speed range is set by the engine rotation speed range setting device 26, and the engine rotation speed is set in the rotation speed range. Then, the speed is detected by the speed sensor 24, an instruction is issued to the electronic governor mechanism A by comparing the two, and the fuel rack 10 moves so that the engine speed and the speed are always the same. When the vehicle speed comes out of the range set by the engine speed range setting device 26, an alarm is issued to the operator. By providing the engine speed range setting device 26 in this manner, the engine speed becomes abnormally high and the PTO speed does not become abnormally high. If the set speed cannot be obtained within the set rotational speed range, the operator shifts the speed stage.

FIG. 17 is a flow chart when the slip rate is controlled in addition to the vehicle speed control, and FIG. 18 is a control block diagram similarly. In this technique, an axle rotation speed sensor 28 and a limit slip rate setting device 27 are provided,
A vehicle speed detected by the speed sensor 24 by detecting a slip ratio from the axle speed sensor 28 and the speed setting device 25;
The engine speed is calculated from the calculated slip rate, and the electronic governor mechanism A is instructed. When the slip rate exceeds the slip rate set by the limit slip rate setting device 27, an alarm is issued to the operator.

[0022]

As described above, the present invention has the following advantages. According to claim 1, the tiger
The engine E is mounted inside the hood of the
The rotation speed detection sensor 1 and the rack position sensor
2 and rack actuator 9 and electronic control unit G
Electronic governor mechanism A attached to the electronic governor mechanism
Let the detected value of the rack position sensor 2 of A be the detected load factor FS
Work equipment control panel 1 on the side of the tractor seat
5 and the load factor of the work machine is displayed on the work machine control panel 15.
The load factor setting device 6 for setting the
The outer circumference of the tilling claw of the rotary tilling device R mounted as an industrial machine
Rotate the till cover 21 and rear cover 22
And the detected load factor FS is equal to the set load factor F.
Set the tillage of the rotary tiller R so that it is within the set range.
The bar 21 and the rear cover 22 are controlled to rotate back and forth.
Since form was, in a case of an increase or decrease of load factor, without lowering the working machine, by rotating first portion of the plow turning cover 21 and the rear cover 22 back and forth, it is returned to the set load factor F Because it can be done, the plowing depth can be kept constant. Further, since the change in the load factor can be detected as an electric signal by the electronic governor mechanism A, it is not necessary to provide a separate draft sensor.

[0023] In the hood of the tractor,
The engine E is mounted on the part,
Number detection sensor 1, rack position sensor 2, and rack actuator
Electronic governor machine composed of eta 9 and electronic control unit G
And a rack position sensor for the electronic governor mechanism A.
The tractor 2 also uses the detected value of the
The work machine control panel 15 is arranged beside the seat of
Load factor setting to set the load factor of the work equipment on the machine control panel 15
A measuring instrument 6 was provided and attached to the rear of the tractor as a working machine.
A lift elevating solenoid valve V1 for raising and lowering the rotary tiller R
V2, and the detected load factor FS is equal to the set load factor F.
The lift elevating solenoid valves V1 and V2 are set so that they fall within the fixed range.
Since the control is performed and the working machine is raised and lowered , the following effects are obtained. That is, unlike the related art, there is no need to provide a mechanical and complicated draft sensor mechanism as in the related art, and since the rack position sensor 2 of the electronic governor mechanism A is also used, the wear resistance and durability are improved. Further, since there is no need to provide a sensor or a feedback mechanism at the base of the hydraulic lift arm, the structure of the draft control mechanism can be simply configured.

According to a third aspect of the present invention, in the hood of the tractor.
The engine E is mounted on the part,
Number detection sensor 1, rack position sensor 2, and rack actuator
Electronic governor machine composed of eta 9 and electronic control unit G
And a rack position sensor for the electronic governor mechanism A.
The tractor 2 also uses the detected value of the
The work machine control panel 15 is arranged beside the seat of
Load factor setting to set the load factor of the work equipment on the machine control panel 15
Provide a measuring instrument 6 and attach it to the rear of the tractor as a working machine
The working and non-working states of the rotary tilling device R
In the working state, the load ratio of the engine E is constant,
The rotation speed of the engine E fluctuates, and in the non-working state,
When the load ratio fluctuates while the engine E
Since the child governor mechanism A is controlled , it is possible to eliminate the necessity of operating the accelerator lever caused by the change between the working state and the non-working state, so that the work can be performed smoothly. In particular, at the time of turning, it is necessary to operate the steering wheel and there is no room to operate the accelerator lever 14, but by configuring as in the present invention, it is not necessary to operate the accelerator lever 14, so that the safety of the operator is secured. It is also possible to plan.

[Brief description of the drawings]

FIG. 1 is a side view of a tractor equipped with a rotary tilling device as a working machine.

FIG. 2 is a side sectional view of the electronic governor mechanism A.

FIG. 3 is a side view of the electronic governor mechanism A.

FIG. 4 is a diagram showing an example of a control map by an electronic governor mechanism A.

FIG. 5 is a hydraulic circuit diagram of a working machine elevating mechanism B including lift elevating electromagnetic valves V1 and V2.

FIG. 6 is a diagram illustrating the movement of a detection signal and a command signal among an electronic control unit G, a lift electronic control unit C, and a work implement elevating mechanism B of the electronic governor mechanism A.

FIG. 7 is a drawing showing a control mechanism for moving a rear cover 22 and a tillage rotation cover 21 of a rotary tillage device R back and forth based on an increase and a decrease in an engine load factor.

FIG. 8 is a control block diagram in the case of position control.

FIG. 9 is a control block diagram in the case of draft control.

FIG. 10 is a control block diagram showing constant load factor control and constant rotation control.

FIG. 11 is a control flowchart drawing.

FIG. 12 is a drawing showing a control state.

FIG. 13 shows that the tillage depth position sensor 4 provided on the rear cover 22 is also a depth sensor, and the rack position sensor 2
FIG. 5 is a control block diagram in a case where a draft sensor is detected by detecting an engine load factor, and both are used as sensors to control the lift elevating electromagnetic valves V1 and V2.

FIG. 14 is a diagram showing control for controlling speed when the work machine is installed on the ground.

FIG. 15 is a flowchart in the case where the electronic governor mechanism A simultaneously controls the vehicle speed of the tractor.

FIG. 16 is a control block diagram.

FIG. 17 is a flowchart in a case where control of a slip ratio is performed in addition to control of a vehicle speed.

FIG. 18 is also a control block diagram.

[Explanation of symbols]

 F Set load factor FS Detected load factor D Detected towing load DM Average calculated value A Electronic governor mechanism B Work implement elevating mechanism C Lift electronic control unit V1 Elevating solenoid valve V2 Descending solenoid valve 1 Rotation speed sensor 2 Rack position sensor 3 Lift angle Sensor 4 Tillage position sensor 5 Accelerator lever sensor 6 Load factor setting device 7 Work implement position setting device 8 Automatic / manual switch 9 Rack actuator 10 Fuel rack 11 Rack bar 12 Magnetic rotating body 18 PTO connecting / disconnecting solenoid valve 19 Ground work Machine load detector 20 Hydraulic cylinder 21 Tilling rotation cover 22 Rear cover 23 Work / non-work detector 24 Speed sensor 25 Speed setting device 26 Engine speed range setting device 27 Limit slip ratio setting device 28 Axle speed sensor

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kiyohide Yoshikawa 1-32 Chaya-cho, Kita-ku, Osaka-shi, Osaka Inside Yanmar Diesel Co., Ltd. (56) References JP-A-59-143503 (JP, A) JP-A-59-196002 (JP, A) JP-A-59-21301 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) A01B 67/00 A01B 63/11-63/14

Claims (3)

(57) [Claims] An engine E is provided inside a hood of a tractor.
The engine E is mounted on a side face of the engine E.
, Rack position sensor 2, rack actuator 9, and electronics
An electronic governor mechanism A configured by the control unit G is provided,
The detection value of the rack position sensor 2 of the electronic governor mechanism A is
Also serves as the detection load factor FS and is located on the side of the tractor seat.
The work machine control panel 15 is disposed, and the work machine control panel 1
5 is provided with a load factor setting device 6 for setting the load factor of the working machine,
Rotary tilling mounted as a working machine behind the tractor
Tilling cover 21 and rear cover that cover the outer circumference of
The bar 22 is configured to be rotatable back and forth, and the detection load factor F
So that S is within the set range of the set load factor F.
The tilling cover 21 and the rear cover 22 of the tilling device R are
A work implement control mechanism for a tractor, characterized in that it is configured to control the rotation of the tractor. 2. An engine E is mounted inside the hood of the tractor.
The engine E is mounted on a side face of the engine E.
, Rack position sensor 2, rack actuator 9, and electronics
An electronic governor mechanism A configured by the control unit G is provided,
The detection value of the rack position sensor 2 of the electronic governor mechanism A is
Also serves as the detection load factor FS and is located on the side of the tractor seat.
The work machine control panel 15 is disposed, and the work machine control panel 1
5 is provided with a load factor setting device 6 for setting the load factor of the working machine,
Rotary tilling mounted as a working machine behind the tractor
Equipped with lift lifting / lowering solenoid valves V1 and V2 for raising and lowering the position R,
The detected load factor FS falls within the set range of the set load factor F.
Control the lift elevating solenoid valves V1 and V2
A tractor working machine control mechanism characterized by raising and lowering the tractor. 3. An engine E inside a hood of a tractor.
The engine E is mounted on a side face of the engine E.
, Rack position sensor 2, rack actuator 9, and electronics
An electronic governor mechanism A configured by the control unit G is provided,
The detection value of the rack position sensor 2 of the electronic governor mechanism A is
Also serves as the detection load factor FS and is located on the side of the tractor seat.
The work machine control panel 15 is disposed, and the work machine control panel 1
5 is provided with a load factor setting device 6 for setting the load factor of the working machine,
Rotary tilling mounted further to the working machine to the rear of the tractor
Judge the working state and non-working state of the tilling device R and switch to the working state.
In this case, the load ratio of the engine E is constant,
The number of rotations fluctuates, and in the non-working state, the engine E
Electronic governor mechanism for changing the load factor with constant number of turns
A. A tractor working machine control mechanism for controlling A.