JPH0932643A - Portable engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable engine, in which fuel can be prevented from being discharged from a fuel reservoir of a carbureter. SOLUTION: A portable engine comprises an engine main body 1, a carbureter 2 for supplying vaporized fuel to the engine main body 1, a fuel tank 4 for supplying fuel to a fuel reservoir 3 of the carbureter 2, and a tickler operating mechanism 5 for supplying fuel from the fuel tank 4 to the fuel reservoir 3 of the carbureter 2 until it overflows in order to facilitate starting at the time of starting the engine main body 1. Further, the engine comprises a fuel recovery mechanism 20 for recovering fuel overflowing from an overflow port 13 of the fuel reservoir 3 to the fuel tank 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable engine used in a portable fire pump or the like.

[0002]

2. Description of the Related Art In a conventional portable fire pump, when a portable engine is started, a ticker operation is performed to supply the fuel from a fuel tank to a fuel container of a carburetor until it overflows in order to facilitate the starting. At this time, the overflowed fuel was discharged to the outside through the overflow pipe. In addition, conventionally, when using a portable fire pump for a long period of time in preparation for the next use, the drain valve is opened to prevent the fuel remaining in the fuel container of the carburetor from deteriorating. The fuel was discharged to the outside to empty the inside of the fuel container.

[0003]

However, in all conventional portable engines, fuel is spilled to the outside when the tickler is operated or when the drain valve is opened.
There was a problem of polluting the environment.

An object of the present invention is to provide a portable engine capable of preventing the fuel from dripping from the fuel storage container of the carburetor.

[0005]

SUMMARY OF THE INVENTION The present invention comprises an engine body, a carburetor for supplying vaporized fuel to the engine body,
A fuel tank for supplying fuel to the fuel storage container of the carburetor, and a ticker operation for performing an operation of supplying fuel from the fuel tank to the fuel storage container of the carburetor until it overflows in order to facilitate starting when starting the engine body. A portable engine equipped with a mechanism is targeted for improvement.

The portable engine according to the present invention is characterized in that a fuel recovery mechanism for recovering the fuel overflowing from the fuel container to the fuel tank is provided.

With this structure, it is possible to prevent the fuel from overflowing from the fuel storage container of the carburetor during the ticker operation.

Further, the portable engine according to the present invention is characterized in that a fuel recovery mechanism for recovering the fuel discharged from the drain valve of the fuel container to the fuel tank is provided.

With this structure, it is possible to prevent dripping when the fuel is discharged from the drain valve of the fuel container.

In this case, the fuel recovery mechanism may have a structure including a recovery pipe extending from the fuel container to the fuel tank, and a check valve and a pump connected to the recovery pipe.

With such a structure, the recovered fuel can be easily returned to the fuel tank by the pump. Further, the presence of the check valve can prevent the reverse flow of fuel from the fuel tank through the recovery pipe.

Further, the fuel recovery mechanism is connected to a recovery pipe extending from the fuel container to the fuel tank, a fuel pot connected in the middle of the recovery pipe, and a recovery pipe extending from the fuel pot to the fuel tank. A structure including a check valve and a pump can also be adopted.

By thus connecting the fuel pot in the middle of the recovery pipe, the recovered fuel can be temporarily stored in the fuel pot, pumped up by the pump and returned to the fuel tank.
The pump can be operated efficiently.

Further, in the portable engine according to the present invention, a fuel pot for collecting the fuel overflowing from the fuel container and the fuel discharged from the drain valve of the fuel container, and the fuel collected in the fuel pot are used as the fuel. A fuel recovery mechanism including a recovery pipe for returning to the tank and a check valve and a pump connected to the recovery pipe is provided.

Since such a fuel recovery mechanism recovers the fuel overflowing from the fuel container and the fuel discharged from the drain valve of the fuel container to a common fuel pot, a common check valve and pump are used. The fuel tank can be returned to the fuel tank, and the structure can be simplified.

[0016]

1 to 3 show an example of an embodiment of a portable engine according to the present invention.

This example shows an example in which the present invention is applied to a portable engine used in a portable fire pump.

In the portable engine of this embodiment, an engine body 1, a carburetor 2 for supplying vaporized fuel to the engine body 1, and a fuel storage container 3 of the carburetor 2 arranged above the carburetor 2. And a ticker operating mechanism 5 for supplying fuel from the fuel tank 4 to the fuel storage container 3 of the carburetor 2 until the fuel overflows in order to facilitate starting when starting the engine body 1. It has a structure with.

The fuel is supplied to the fuel storage container 3 of the carburetor 2 from a fuel supply pipe 6 extending from the fuel tank 4 to the fuel storage container 3 and at the outlet of the fuel supply pipe 6 above the fuel storage container 3. The supply control valve 7 and the fuel container 3 of the carburetor 2 at a position adjacent to the fuel supply control valve 7
A donut type float 9 which is rotatably supported by a support shaft 8 and which controls the fuel supply by controlling the upper and lower sides of the valve body 7a of the fuel supply control valve 7 with a valve operating portion 9a. It is supposed to be done.

The carburetor 2 sucks up the fuel in the fuel container 3 and the vaporized fuel supply passage 10 for supplying the vaporized fuel to the engine body 1, the choke valve 11 provided in the vaporized fuel supply passage 10. A vaporization nozzle 12 that vaporizes with the air supplied from the lower portion and ejects the vaporized fuel into the vaporized fuel supply passage 10, and an overflow port 13 that causes the fuel in the fuel storage container 3 to overflow when the storage limit is reached.
And a drain screw 14a provided in the lower portion of the fuel storage container 3 for discharging the fuel in the fuel storage container 3.
And a drain valve 14 having a drain port 14b.

The tickler operating mechanism 5 includes the engine body 1
An operation lever 16 pivotally supported on a side by a shaft 15;
An operation knob 18 for rotating the operation lever 16 at one end side of the operation lever 16 via a rod 17, and a float 9 supported at the other end side of the operation lever 16 when the operation lever 16 rotates. It has a structure including an operation pin 19 for pushing down.

In such a portable engine, a fuel recovery mechanism 20 for recovering the fuel overflowing from the overflow port 13 of the fuel container 3 and the fuel discharged from the drain valve 14 of the fuel container 3 into the fuel tank 4 is provided. It is provided.

The fuel recovery mechanism 20 recovers the fuel overflowing from the overflow port 13 of the fuel container 3 and the fuel discharged from the drain valve 14 of the fuel container 3 through the recovery pipes 21 and 22. And a recovery pipe 24 for returning the fuel recovered in the fuel pot 23 to the fuel tank 4, a check valve 25 and a manual pump 26 connected to the recovery pipe 24.

In such a portable engine, the overflow port 13 of the fuel container 3 is operated during the ticker operation.
The fuel overflowing from the fuel is collected in the fuel pot 23 through the collecting pipe 21. Further, when the portable engine is stored for a long time after use, the fuel in the fuel container 3 is discharged from the drain port 14b of the drain valve 14 and emptied in order to prevent the fuel from being deteriorated. However, the fuel discharged at this time is recovered in the fuel pot 23 through the recovery pipe 22. The fuel recovered in this way is transferred to the manual pump 26
By opening and closing the grip of the fuel tank 4 through the recovery pipe 24
Return to At this time, since the check valve 25 is provided in the recovery pipe 24, it is possible to prevent the fuel from flowing backward from the fuel tank 4 through the recovery pipe 24.

In particular, in this embodiment, the fuel recovered from the overflow port 13 and the fuel recovered from the drain port 14b are recovered by the common fuel recovery mechanism 20, so that the structure can be simplified. .

It should be noted that the fuel recovery mechanism 20 may be configured separately for one for recovery from the overflow port 13 and one for recovery from the drain port 14b.

Further, in the fuel recovery mechanism 20, an electric pump can be used instead of the manual pump 26.

[0028]

In the portable engine according to the present invention,
Since the fuel recovery mechanism for recovering the fuel overflowing from the fuel storage container to the fuel tank is provided, it is possible to prevent the overflow of the fuel overflowing from the fuel storage container of the carburetor during the ticker operation, and to prevent the environmental pollution. .

Further, in the portable engine according to the present invention, since the fuel recovery mechanism for recovering the fuel discharged from the drain valve of the fuel storage container to the fuel tank is provided, when the fuel is discharged from the drain valve of the fuel storage container. It is possible to prevent runoff and prevent environmental pollution.

In this case, if the fuel recovery mechanism has a structure including a recovery pipe from the fuel container to the fuel tank, and a check valve and a pump connected to the recovery pipe, the recovered fuel can be easily pumped. Can be returned to the fuel tank. Further, the presence of the check valve can prevent the reverse flow of fuel from the fuel tank through the recovery pipe.

Further, the fuel recovery mechanism is connected to a recovery pipe extending from the fuel container to the fuel tank, a fuel pot connected in the middle of the recovery pipe, and a recovery pipe extending from the fuel pot to the fuel tank. With the structure including the check valve and the pump, the recovered fuel can be temporarily stored in the fuel pot, pumped by the pump and returned to the fuel tank, and the pump can be operated efficiently.

Further, in the portable engine according to the present invention, the fuel pot for collecting the fuel overflowing from the fuel container and the fuel discharged from the drain valve of the fuel container, and the fuel collected in the fuel pot are used as the fuel. Since the fuel recovery mechanism including the recovery pipe for returning to the tank, the check valve and the pump connected to the recovery pipe is provided, the fuel overflowing from the fuel container and the drain valve of the fuel container are discharged. The fuel and the fuel can be recovered in the common fuel pot, and therefore, the fuel can be returned to the fuel tank by using the common check valve and pump, and the structure of the fuel recovery mechanism can be simplified.

[Brief description of drawings]

FIG. 1 is a front view showing an example of an embodiment of a portable engine according to the present invention.

FIG. 2 is a vertical sectional view showing a schematic configuration of a carburetor used in this example.

FIG. 3 is a front view showing a configuration of a carburetor used in this example.

[Explanation of symbols]

 1 Engine Body 2 Carburetor 3 Fuel Storage Container 4 Fuel Tank 5 Ticker Operation Mechanism 6 Fuel Supply Piping 7 Fuel Supply Control Valve 7a Valve Body 8 Spindle 9 Float 10 Vaporized Fuel Supply Passage 11 Choke Valve 12 Vaporization Nozzle 13 Overflow Port 14 Drain Valve 14a Drain screw 14b Drain port 15 Shaft 16 Operation lever 17 Rod 18 Operation knob 19 Operation pin 20 Fuel recovery mechanism 21,22 Recovery pipe 23 Fuel pot 24 Recovery pipe 25 Check valve 26 Manual pump

Claims (5)

[Claims] 1. An engine body, a carburetor for supplying vaporized fuel to the engine body, a fuel tank for supplying fuel to a fuel storage container of the carburetor, and a starter for facilitating the starting of the engine body. In a portable engine having a tickler operation mechanism that performs an operation of supplying the fuel from the fuel tank to the fuel container of the carburetor until it overflows, the fuel overflowing from the fuel container to the fuel tank A portable engine characterized by being provided with a fuel recovery mechanism for recovering. 2. An engine body, a carburetor for supplying vaporized fuel to the engine body, a fuel tank for supplying fuel to a fuel storage container of the carburetor, and for facilitating starting when starting the engine body. And a tickler operating mechanism for performing an operation of supplying the fuel from the fuel tank to the fuel container of the carburetor until it overflows, wherein the fuel discharged from the drain valve of the fuel container is A portable engine having a fuel recovery mechanism for recovering the fuel in a fuel tank. 3. The fuel recovery mechanism has a structure including a recovery pipe extending from the fuel container to the fuel tank, and a check valve and a pump connected to the recovery pipe. The portable engine according to claim 1 or 2. 4. The fuel recovery mechanism includes a recovery pipe extending from the fuel container to the fuel tank, a fuel pot connected in the middle of the recovery pipe, and the recovery pipe extending from the fuel pot to the fuel tank. The portable engine according to claim 1 or 2, wherein the portable engine has a structure including a check valve and a pump connected to the portion. 5. An engine body, a carburetor for supplying vaporized fuel to the engine body, a fuel tank for supplying fuel to a fuel storage container of the carburetor, and a starter for facilitating the starting of the engine body. A portable engine having a tickler operation mechanism for performing an operation of supplying the fuel from the fuel tank to the fuel container of the carburetor until it overflows, wherein the fuel overflows from the fuel container and the fuel container A fuel pot for recovering the fuel discharged from the drain valve, a recovery pipe for returning the fuel recovered in the fuel pot to the fuel tank, and a check valve and a pump connected to a part of the recovery pipe. A portable engine, comprising a fuel recovery mechanism including: