JPH0971140A - Fuel feed system structure for combine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the reduction of the stability of maneuverability by detecting the quantity of the fuel in the second fuel tank, feeding this fuel to an engine in preference to the fuel in the first fuel tank, and feeding the fuel in the first fuel tank to the engine after the fuel from the second fuel tank is fed. SOLUTION: This fuel feed system structure is provided with a control device 18 operating an opening/closing valve 17 based on the detection results of the first and second fuel detecting sensors 19, 20. When the first and second fuel detecting sensors 19, 20 detect that there is fuel in the first and second fuel tanks 9, 10, the fuel in the second fuel tank 10 is fed to an engine E in preference to the fuel in the first fuel tank 9 based on the detection results. When the first and second fuel detecting sensors 19, 20 detect that the fuel in the second fuel tank 10 is almost consumed, the feed of the fuel in the first fuel tank 9 to the engine E is started. A maneuver section 5 is provided with a warning buzzer and a lamp 21 reporting the fuel exhaustion of the first fuel tank 9 to a driver when the fuel in the first fuel tank 9 is completely consumed.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a combine fuel supply system structure.

[0002]

2. Description of the Related Art In a conventional combine fuel supply system structure, there is only one fuel tank arranged below a steering step which is a front part of a fuselage [for example, an actual Kaihei 5-3.
No. 4139].

[0003]

According to the above-mentioned conventional structure, since the fuel tank is arranged below the maneuvering step which is the front part of the fuselage, the remaining amount of fuel decreases with time from the start of work. It becomes less and the front side of the aircraft becomes lighter,
Combined with the fact that the rear side of the fuselage became heavy with the grains stored in the grain storage unit such as the Glen tank, the balance of the fuselage was likely to be lost.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent the balance of the machine body from being lost easily even after a lapse of time from the start of work, and prevent the maneuverability from being deteriorated with the lapse of time from the start of work. To do.

[0005]

[Means for Solving the Problems]

[Structure] The characteristic structure of the invention according to claim 1 is that the first fuel tank is provided in front of the center of gravity of the machine body and the second fuel tank is provided in the rear part of the machine body.
Fuel detection is provided for arranging fuel tanks respectively, and providing opening / closing valves for opening / closing the oil passages between the first and second fuel tanks and the engine, respectively, and detecting the amount of fuel in the second fuel tanks. Means for supplying the fuel in the second fuel tank to the engine in preference to the fuel in the first fuel tank, and after supplying the fuel from the second fuel tank, the first fuel It is configured such that the fuel in the tank can be started to be supplied to the engine.

A feature of the invention according to claim 2 is that in the invention according to claim 1, a return oil passage for returning surplus fuel from the engine is connected to the first fuel tank side. .

According to a third aspect of the present invention, in the first or second aspect of the invention, the on-off valve is of a drive type, and the fuel in the second fuel tank is about to run out. When the detection means detects, the control means for driving and controlling the on-off valve is provided so that the fuel in the first fuel tank is supplied to the engine based on the detection result. [Operation] According to the structure of claim 1, the second fuel tank on the rear side of the machine body becomes lighter with the lapse of time from the start of the work, and further, the first fuel tank is located on the front side with respect to the center of gravity of the machine body. Since there is one fuel tank, even if the number of grains in the grain storage section on the rear side of the fuselage increases, it is difficult for the fuselage to lose its balance.

Further, since the fuel tank is divided into two and distributed as described above, it is not necessary to take a large space for one integrated fuel tank, and the vacant space before and after the fuselage is gradually increased. Both tanks can be compactly accommodated in the airframe by making effective use.

According to the structure of claim 2, in addition to the same operation as the operation according to the structure of claim 1, a return oil passage for returning surplus fuel from the engine is provided.
Since the communication is connected to the first fuel tank side, the first fuel tank can be made heavier with the lapse of time from the start of work, and the balance of the machine body can be made more difficult to collapse.

According to the third aspect of the present invention, in addition to the same operation as that of the first or second aspect, the control means drives and controls the drive type on-off valve. The switching from the second fuel tank to the first fuel tank can be accurately performed, and the labor of the driver can be reduced as compared with the case where the driver manually operates the opening / closing valve.

[Effect] Therefore, according to the first or second aspect of the invention, it is possible to prevent the balance of the machine body from being lost easily even after a lapse of time from the start of the work, and the maneuverability is deteriorated with the lapse of time from the start of the work. Can be prevented.

Further, according to the third aspect of the present invention, the same effect as that of the first or second aspect of the present invention can be obtained, and in addition, the switching from the second fuel tank to the first fuel tank is accurately performed. The workability can be improved because the driver's work can be reduced and the labor of the driver can be reduced.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a combine, 1 is a mowing unit, 2 is a threshing unit, 3 is a crawler traveling device, 4 is a body, 5 is a control unit, and 6 is a grain tank as a grain storage unit. In the control unit 5 arranged on the right side of the front part of the machine body, the driver's seat 7 is arranged on the driving unit 8 including the engine E. Next, the structure of the fuel supply system in this combine will be described.

As shown in FIG. 2, the first fuel tank 9 is arranged on the left side of the machine body in front of the center of gravity C of the machine body, and the second fuel tank 10 is arranged on the machine body below the rear part of the threshing unit 2. I am doing it. First and second fuel tanks 9 and 10
Are connected to the engine E side by a single pipe 15 (an example of an oil passage) provided with a filter 13 and a pump 14 by merging these pipes 11 and 12 (an example of an oil passage) on the way. . A pipe 16 as a return oil passage for returning excess fuel from the engine E extends, and the pipe 16 is connected to the first fuel tank 9 side for communication.

At the junctions of the pipes 11 and 12 of the first and second fuel tanks 9 and 10, drive type on-off valves for connecting the first and second fuel tanks 9 and 10 to the engine E separately. 17 is provided. Then, the first and second fuel detection sensors 19 and 20 (an example of fuel detection means) for detecting the amounts of fuel in the first and second fuel tanks 9 and 10 are provided as the first and second fuel tanks 9 and 10, respectively. The first and second fuel detection sensors 19 are provided with a control device 18 (an example of control means) that operates the opening / closing valve 17 based on the detection results of the first and second fuel detection sensors 19 and 20. , 20 is the first
When it is detected that there is fuel in the second fuel tanks 9 and 10, the fuel in the second fuel tank 10 is prioritized over the fuel in the first fuel tank 9 based on the detection result.
When it is detected that the fuel in the second fuel tank 10 is about to run out, the fuel in the first fuel tank 9 is started to be supplied to the engine E based on the detection result. Further, when the fuel in the first fuel tank 9 runs out, an alarm buzzer and a lamp 21 are provided in the control section 5 to inform the driver that the fuel in the first fuel tank 9 has run out.

[Other Embodiments] In the above embodiment, the pipes 11 and 12 of the first and second fuel tanks 9 and 10 are joined together on the way, and an on-off valve 17 is provided at the joining portion to form one pipe 15 It was connected to the engine E side by
1 and 12 are provided with on-off valves 17 respectively, and both pipes 11 and 1
2 may be directly connected to the engine E side.

The return oil passage 16 may be connected to both the first fuel tank 9 and the second fuel tank 10.

After the on-off valve 17 is manually operated, the driver opens and closes the on-off valve 17 based on the detection result of the fuel detecting means 20, and after the fuel is supplied from the second fuel tank 10. The fuel in the first fuel tank 9 may be started to be supplied to the engine E.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configuration of the accompanying drawings by this entry.

[Brief description of drawings]

1] Overall side view of combine

FIG. 2 is a plan view of the fuel supply system structure of the combine.

[Explanation of symbols]

 9 1st fuel tank 10 2nd fuel tank 11, 12, 15 Oil passage 16 Return oil passage 17 On-off valve 18 Control means 20 Fuel detection means C Center of gravity position E Engine

Claims (3)

[Claims] 1. A first unit in front of the center of gravity (C) of the airframe.
The fuel tank (9) and the second fuel tank (1
0) respectively, and an oil passage (1) between the first and second fuel tanks (9), (10) and the engine (E).
An opening / closing valve (17) for opening / closing each of (1), (12) and (15) is provided, and the second fuel tank (1) is provided.
0) is provided with fuel detection means (20) for detecting the amount of fuel in the second fuel tank (10).
The fuel in the first fuel tank (9) can be supplied to the engine (E) prior to the fuel in the fuel tank (9), and after the fuel is supplied from the second fuel tank (10). A combine fuel supply system structure configured to be able to start supply to the engine (E). 2. The combine fuel supply system structure according to claim 1, wherein a return oil passage (16) for returning surplus fuel from the engine (E) is connected to the first fuel tank (9) side. . 3. The on-off valve (17) is of a drive type,
When the fuel detecting means (20) detects that the fuel in the second fuel tank (10) is about to run out, the fuel in the first fuel tank (9) is based on the detection result and the engine ( The combine fuel supply system structure according to claim 1 or 2, further comprising a control means (18) for driving and controlling the on-off valve (17) so as to be supplied to E).