JPS6044488B2 - Mixed fuel tank with fuel mixing device - Google Patents

Abstract

PURPOSE:To save time for mixing, by eliminating the need for beforehand forming blended oil by operating a valve body by opening and cosing a clover by oiling operation and by automatically forming blended oil by opening and closing an opening of a measuring chamber. CONSTITUTION:When an oiling port 16 is blocked by means of a cover 36 of a blended oil tank 11, a lower surface of a valve body 23 is seated on a valve hole 18 at the lower side because a push rod 45 pushes down a nose of a functioning lever 34 and the valve body 23 is pushed down by means of a spring 27, and a valve hole 22 at the upper side is opened. Thus, the inside of a lubricating oil tank 12 communicates with a measuring chamber 19, and is filled. When the oiling port 16 of the tank 11 is opened, the lever 34 is pulled by means of a spring 35 because the rod 45 parts from the lever 34, the valve body 23 is pushed up through a valve spindle 24b at the lower side, the valve hold 18 is opened, the valve hole 22 is closed and lubricating oil is weighing flowed into the tank 11 from the measuring chamber 19 while inflow from the tank 12 is checked.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mixed fuel tank for an engine that uses so-called mixed fuel, which is a mixture of fuel (gasoline) and lubricating oil, and which easily and automatically mixes the fuel and lubricating oil. The object of the present invention is to provide a mixed fuel tank with a fuel mixing device, which is equipped with a mixing device.

It is generally known that two-stroke engines use a mixture of fuel and lubricating oil, but there are few stores that sell mixed oil at gas stations etc., and users must purchase their own fuel and lubricating oil. It is necessary to purchase these separately and mix them together, and this process is often disliked because it stains hands and clothes and is troublesome. For this reason, conventional vehicles are equipped with separate fuel tanks and lubricating oil tanks, and lubricating oil is supplied into the engine by an oil pump installed separately from a fuel supply device such as a carburetor, which is the so-called separated oil system. is being developed. However, since this type requires an oil pump, the overall structure of the engine tends to be complicated. This invention has been made to solve the above-mentioned drawbacks, and is a fuel that eliminates the need for mixing fuel and lubricating oil in advance, and automatically generates a mixed oil using a complicated device such as an oil pump. The present invention aims to provide a mixed fuel tank with a mixing device.

An embodiment of the present invention will be described below based on the drawings in which the invention is applied to a bicycle with an engine shown in FIGS. 1 to 3. In the figure, 1 is a bicycle body, 2 is a front wheel, 3 is a rear wheel, 4 is an operating handle, 5 is a rear wheel drive pedal, and 6 is an engine having a carburetor 6a, which is a two-stroke type.

The engine 6 rotates a centrifugal clutch 8 via a belt 7, and a roller 9 connected to the centrifugal clutch 8 is brought into contact with the rear wheel 3 so as to be able to move toward and away from the rear wheel 3. The rear wheels are driven by frictional contact between the wheels. Reference numeral 10 denotes a loading platform, and a mixed oil tank 11 for supplying mixed oil to the carburetor 6a of the engine 6 is attached to the lower part of the loading platform 10, and a lubricating oil tank 12 is arranged above the loading platform 10. ing.

These tanks 11 and 12 will be explained based on FIGS. 2 and 3. The mixed oil tank 11 has a supply port 13 to the engine 6 formed in its bottom wall, and is equipped with a liquid level gauge 14 made of a transparent tube (vibrator) connected to the upper and lower parts of the tank 11 on the outside. There is. Further, a connection port 15 and a fuel (gasoline) filling port 16 are formed in the upper wall of the mixed oil tank 11 . The lower end of the connecting body 17 is screwed into the connection port 15 . The connecting body 17 has a cup shape, and has a lower valve light 18 connected to the mixed oil tank 11 via the connection port 15 on its lower surface.
The inside of this connecting body 17 constitutes a communication passage connecting the lubricating oil tank 12 and the mixed oil tank 11, and in the case of this embodiment, this communication passage also serves as the lubricating oil measuring chamber 19. . A sealing body 20 is screwed onto the upper surface of the connecting body 17, and an outlet 21 formed in the lower wall of the lubricating oil tank 12 is removably screwed into this sealing body 20. The sealing body 20 has an upper valve hole 22 directly opposite the lower valve hole 18.
is open, and this upper valve hole 22 communicates with the lubricating oil tank 12 via the outlet 21. However, measuring room 19
A valve body 23 is housed inside, and this valve body 23 has valve stems 24a, 24b projecting from above and below, and each valve stem 24a, 24b.
loosely pass through the valve holes 18 and 22, respectively, and the valve stem guide 25,
It is inserted in 26. The lower surface of the valve body 23 is designed to be able to be detachably seated in the lower valve hole 18 to close it. At this time, the upper valve hole 22 is opened, and the upper surface thereof is removably seated in the lower valve hole 18. It is designed to be removably seated in the hole 22 to close it, and at this time the lower valve hole 18 is opened. Further, this valve body 23 is constantly pressed downward by a coil spring 27. Also, don't use transparent tubes in the measuring chamber 19! The lower end of the oil level gauge 28 is in communication with the oil level gauge 28.
The upper end of the lubricating oil tank 12 is guided upward along the outer surface of the lubricating oil tank 12, and the upper end is open to the atmosphere. Further, 29 is a lubricating oil replenishment port opened on the top surface of the lubricating oil tank 12, 30 is a key-up for closing this replenishment port 29, and 31 is a sealing member. An operating lever 34 is rotatably attached to the inside of the mixed oil tank 11 via a bracket 32 and a support pin 33.

The lower valve rod 24b hanging down from the valve body 23 is in contact with the middle of the operating lever 34, and the tip of the operating lever 34 extends below the fuel filler port 16. A coil spring 35 is spanned between the tip of the actuating lever 34 and the mixed oil tank 11, and the actuating lever 34 is always biased to rotate upward by the coil spring 35. . On the other hand, oil filler port 1 of mixed oil tank 11
6 is opened and closed by a lid 36, which is composed of a cap 37 screwed onto the outside of the fuel filler port 16, and a closing body 38 covered by the cap 37. The closing body 38 has engaging pieces 39, 39 on the circumferential side, and these engaging pieces 39, 39 pass through axial guide grooves 40, 40) provided on the inner surface of the oil filler port 16, grooves 40, 40
It is adapted to be locked in circumferential locking grooves 41, 41 that are connected to each other. In other words, the closing body 38 has its engaging pieces 39,3
9 is fitted into the guide grooves 40, 40 and pushed and displaced,
Then, by rotating in one direction, the engaging piece 39,
39 engages with the locking grooves 41, 41, so that it is attached to the oil filler port 16. In addition, 42 is a sealing material, 4
3 is an air breather hole formed in the closure body 38, and 44 is an air bleed hole similarly formed in the cap 37. A pressing rod 45 is suspended from the closing body 38, and the lower end of the pressing rod 45 comes into contact with the tip of the operating lever 34. By attaching and detaching the closing body 38 to the fuel filler port 16, the operating lever 34 is rotated via the pressing rod 45. The operation of such a configuration will be explained.

While the lubricating oil tank 12 is filled with lubricating oil,
When the oil filler port 16 is closed by the lid 36 of the mixed oil tank 11, that is, the closing body 38 and the cap 37, a pressing rod 45 protruding from the closing body 38 pushes down the tip of the operating lever 34.

Therefore, the valve body 23 is pushed down by the elasticity of the coil spring 27, so that its lower surface attaches to and detaches from the lower valve hole 18, closing the lower valve hole 18, and at the same time, the upper valve hole 22 is opened. ing. Therefore, the inside of the lubricating oil tank 12 is
It communicates with the metering chamber 19 through the valve hole 22, so that the lubricating oil in the lubricating oil tank 12 also flows into this metering chamber 19 and fills the metering chamber 19. When the amount of mixed oil in the mixed oil tank 11 decreases and it becomes necessary to replenish it, the oil filler port 16 of the mixed oil tank 11 is opened.

That is, when the cap 37 is removed and then the closing body 38 is removed, the press rod 45 separates from the actuation lever 34, so that the actuation lever 34 is pulled by the coil spring 35 and rotated upward. For this reason, the lower valve stem 24b is
3 is pushed up against the coil spring 27, and as a result, the lower surface of the valve body 23 opens the lower valve hole 8, and then the upper surface seats on the upper valve hole 22 and closes the upper valve hole 22.
Therefore, the lubricating oil in the metering chamber 19 flows through the lower valve hole 18.
, flows into the mixed oil tank 11 through the connection port 15.
In this state, since the upper valve hole 22 is closed by the valve body 23, the lubricating oil in the lubricating oil tank 12 does not flow down into the mixing tank 11, and therefore the measuring chamber 19 is filled. Since only the same amount of lubricating oil flows in, a certain amount of lubricating oil is replenished into the mixed oil tank 11. In addition, measuring room 1
Since the upper end of the oil level gauge 28 connected to the oil level gauge 9 is open to the atmosphere, the lubricating oil in the measuring chamber 19 quickly and smoothly flows into the mixed oil tank 11 side. In this state where the fuel filler port 16 is opened, only fuel is supplied through the fuel filler port 16. Then, the fuel flowing into the mixed oil tank 11 generates a vortex in this tank 11 to stir and mix the lubricating oil, and the fuel mixed with an appropriate amount of lubricating oil is stored in the mixed oil tank 11. become. When the amount of mixed oil is filled, the oil filler port 16 is closed.

In this case, when the closing body 38 is attached, the pressing rod 45 pushes the operating lever 34 again and rotates the operating lever 34 downward against the coil spring 35. As a result, the valve body 23 descends to open the upper valve hole 22 and lower valve hole 18.
Close. Therefore, the lubricating oil in the lubricating oil tank 12 flows into the metering chamber 19 to prepare for the next replenishment to the mixed oil tank 11. After closing the closing body 38 in this manner, the cap 37 is screwed on. However, according to such an embodiment, the mixing oil tank 11 as part of the refueling operation
Attach and remove the lid 36. A predetermined amount of lubricating oil is automatically replenished into this mixed oil tank 11 as the operation is performed. There is no need for troublesome work such as mixing the two.

Further, the above configuration has a simpler structure and is easier to handle than a system using a special pump. Furthermore, since the lubricating oil tank 12 can be attached to and removed from the sealing body 20 of the connecting body 17 that constitutes the measuring chamber 19, when the inside of the lubricating oil tank 12 becomes empty, the cap 30 can be opened and water can be drained from the replenishment port 29. In addition to replenishing lubricating oil, it is also possible to replace the tank 12 itself and replace it with a new tank filled with lubricating oil.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and can be implemented even in a modified example as shown in FIG. 4, which will be described below.

In the case shown in FIG. 4, a communicating passage 51 is formed on the lower surface of the lubricating oil tank 12 by a connected tube (a vibrator may also be used) 50, and a measuring chamber 52 in which this communicating passage 51 is formed inside the mixed oil tank 11. It is connected to. This metering chamber 52 is constructed by fitting a piston 54 into a cylinder 53 so as to be able to move up and down.
It is connected to the communication path 51 via the outlet port 56, which is also in the form of a small hole.
It communicates with the inside of the mixed oil tank 11 via. The inlet 55 is provided with a check valve 57 that allows only the flow from the communication path 51 to the measuring chamber 52 side, and the outlet 56 is provided with a check valve 57 that allows the flow from the measuring chamber 52 into the mixed oil tank 11. A check valve 58 is provided that allows only the The piston 54 is always pushed upward by a coil spring 59, and the upper surface of the piston 54 is in contact with a pressing rod 61 that hangs down from a lid 60 that opens and closes the fuel filler port 16. Note that 62 is a stopper that restricts the upward position of the piston 54. According to such a configuration, the lid 6
When 0 is removed, the pressing rod 61 is pulled out and the piston 54 rises, which creates a negative pressure in the metering chamber 52, so the lubricating oil in the lubricating oil tank 12 is drained from the inlet 55 via the communication path 51. It is introduced into this measuring chamber 52.

After replenishing fuel from fuel filler port 16 in this state,
When this fuel filler port 16 is closed with the lid 60, the presser hole 61
Since the piston 54 is pushed down, the pressure in the metering chamber 52 increases, and the lubricating oil in the metering chamber 52 is forced into the mixed oil tank 11 through the outlet 56. Therefore, the lubricating oil is mixed with the fuel in the mixed oil tank 11. Even in this case, a predetermined amount of lubricating oil is automatically supplied into the mixed oil tank 11 as the lid is opened and closed for refueling.
Furthermore, since the lid is opened and closed when replenishing the fuel, the fuel and lubricating oil are automatically mixed and stirred.

According to the invention described in detail above, the measured lubricating oil is supplied to the mixed fuel tank in response to the refueling operation, so mixed fuel is automatically generated each time fuel is refueled. This eliminates the need for troublesome work such as preparing your own mixed fuel in advance.

Therefore, there is a practical advantage that even if a gas station does not sell mixed fuel, it can be used because only fuel needs to be refilled. In addition, this configuration has a much simpler structure than conventional oil pumps that use separate oil supply, and does not require troublesome handling such as controlling the amount of oil supplied from the oil pump to match the engine speed. It produces effects such as becoming. BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 3 show an embodiment of the present invention, in which FIG. 1 is a side view of a bicycle with an engine, FIG. 2 is a sectional view taken along the line ■-■ in FIG. FIG. 3 is a top view of the fuel filler port of the mixed oil tank with the cap removed, and FIG. 4 is a sectional view showing a modification.

1...Car body, 6...Engine, 11.
...Mixed oil tank (mixed fuel tank), 12...
... Lubricating oil tank, 16 ... Fuel filler port,
17... Connecting body, 19... Measuring chamber, 23...
・Valve body, 34... Actuation lever, 36...
- Lid, 37... Cap, 38... Closing body, 45... Pressing rod, 51...
Communication passage, 52...Measuring chamber, 54...Zeston, 57, 58...Check valve, 60...
・Lid, 61...Press rod.

Claims (1)

[Claims] 1. A mixed fuel tank with a fuel filler port opened and closed by a lid is connected to a lubricating oil tank via a communication path, and a means for measuring the amount of lubricating oil from the lubricating oil tank is provided in this communication path. A mixed fuel tank with a fuel mixing device, characterized in that a means for supplying the metered lubricating oil to the mixed fuel tank is provided, and the supplying means is operated in response to a refueling operation.