JPH0527276U - Vaporizer with engine fuel discharge system cutoff mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] In an engine mounted on a machine that is stored for a long time until the next year after it has been used during agricultural periods such as an agricultural machine, the carburetor part, especially the main jet chamber J
And the jet nozzle 2 is clogged due to deterioration of the gasoline remaining in the float chamber F and gum deposit.
It prevents corrosion and the inability to start after the season. [Constitution] A float chamber F and a main jet chamber J of a carburetor are separated from each other, and a fuel cutoff valve interlocking with a fuel cock 1 is provided between them to simultaneously stop the engine E and simultaneously float the float chamber F and the main jet chamber. It is also configured to shut off the connection with the chamber J.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a technology relating to the structure of a carburetor for a gasoline engine.

[0002]

[Prior Art]

 Conventionally, in the carburetor of the engine, a fuel cutoff device is provided in the communication path between the float chamber and the main jet chamber to prevent the fuel in the float chamber from being sucked into the carburetor and ensure the engine to stop. The technology for making it known is known. For example, it is like the technique described in Japanese Utility Model Laid-Open No. 62-93150.

[0003]

[Problems to be solved by the device]

 In a gasoline engine mounted on a seasonal work machine such as a binder or rice transplanter, the gasoline remaining inside the float chamber of the carburetor deteriorates during long-term storage during the off season, and the deteriorated gasoline Corrosion of the jet nozzle part dipped in the product or clogging due to the volume of the gum substance causes the parts of the jet nozzle, which are precision parts, to not operate, resulting in problems such as poor starting at the start of the season opening work. There was something to do. In order to solve the problems of the prior art, the present invention separates the float chamber and the jet nozzle chamber from each other in a carburetor, connects the two with a communication path, and connects the fuel cutoff valve to the communication path. By providing the fuel shutoff valve with the fuel cock, the float chamber and the main jet chamber are shut off at the end of the seasonal work, and the gasoline in the main jet chamber is eliminated by vaporization and evaporation. The deteriorated gasoline is designed so that it will not come into contact with the main jet.

[0004]

[Means for Solving the Problems]

 The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. That is, in the carburetor of the engine, the float chamber and the main jet chamber are isolated from each other, and the two are connected by a communication path, and a fuel cutoff valve is provided in the main jet chamber as close to the main jet as possible through the communication path. The fuel cutoff valve is configured to open and close in conjunction with the fuel cock. Further, a drain passage is provided in the fuel cock, and the float chamber and the drain circuit communicate with each other in conjunction with the closing of the fuel cock.

[0005]

[Action]

 Next, the operation will be described with reference to FIG. FIG. 4 shows the communication states of the fuel oil passage 13 of the fuel cock 1, the jet oil passage 12 and the drain passage D over three states, that is, during operation, during stopped storage and during stopped drain. During operation, the fuel oil passage 13 is in an open communication state, and the fuel oil in the fuel tank is supplied to the float chamber F. Further, the jet oil passage 12 opens a communication between the float chamber F and the main jet chamber J. However, the drain passage D closes the passage to the drain oil passage 20. Next, at the time of stopped storage, the fuel oil passage 13 shields between the fuel tank and the float chamber F, and the jet oil passage 12 between the float chamber F and the main jet chamber J is closed. Further, the drain passage D is closed to the drain oil passage 20. Next, in the case of the stop drain, the fuel oil passage 13 is closed by the operator rotating the fuel cock 1 further 180 degrees from the stopped state, and the jet oil passage 12 is connected to the drain oil passage 20. Through this, both the fuel in the float chamber F and the fuel in the main jet chamber J are discharged from the drain oil passage 20 to the drain circuit of the fuel tank.

[0006]

【Example】

 Next, examples will be described. 1 is a side sectional view showing a carburetor with a fuel discharge system cutoff mechanism of an engine of the present invention, and FIG. 2 is a side sectional view of a carburetor with a fuel discharge system cutoff mechanism of an engine in which a drain passage D is provided in a fuel cock 1. FIG. 3 is a side sectional view of a carburetor-integrated embodiment provided with a drain passage D, and FIG. 4 is an operation diagram showing respective passage positions during operation, during stopped storage, and during stopped drain.

The entire configuration will be described with reference to FIG. The carburetor body A is provided with a mixing passage 21 for intake air and fuel. The intake air from the air cleaner passes through the mixing passage 21, and the main jet pipe 7 projects into the mixing passage 21. Negative pressure is generated in the main jet pipe 7 by high-speed intake in the mixing passage 21, and the fuel changed from liquid to gas is sucked in the portion of the jet nozzle 2 and is sucked out into the mixing passage 21. is there. Liquid fuel from the main jet chamber F 1 is supplied below the jet nozzle 2 through an oil passage in the main jet passage bolt 11. The fuel oil passage in the main jet passage bolt 11 is configured to communicate with and cut off from the jet oil passage 12 of the fuel cock 1.

Further, the fuel cock 1 usually only has a fuel oil passage 13 for blocking between the fuel pipe insertion portion 5 from the fuel tank and the fuel pipe insertion portion 6 into the cablet float chamber. However, in the present invention, the fuel cock 1 is arranged in the vicinity of the main jet chamber J, and the jet oil passage 12 is closed together with the closing of the fuel cock 1 so that the float chamber and the main jet chamber J are shut off. And Reference numeral 9 is a main jet constituent protrusion protruding from the cablet body A, and 8 is a float chamber container.

In the conventional technology, the float chamber F and the main jet chamber J are always in communication with each other, and are used only during the agricultural prosperous season, like agricultural machinery, and when stored for a long time in other seasons. Also, the float chamber F and the main jet chamber J were in communication with each other. During storage for a long time, gasoline as a fuel deteriorates, water and oil are separated, and residual gum deposit is deposited and accumulated, which corrodes the jet nozzle 2 of the main jet chamber J and causes clogging. It happened, and there was a start failure at the beginning of the season. According to the present invention, the float chamber F and the main jet chamber J are separated from each other, and a small amount of fuel oil remaining in the main jet chamber J is evaporated in a short time and released into the intake pipe to prevent the jet nozzle 2 from being corroded or clogged. Of. As a result, it is possible to prevent the occurrence of the unstartable state at the beginning of the season after storage for a long time.

The embodiment shown in FIG. 2 will be described. A main jet chamber J is formed in a portion of a main jet constituting projection 9 protruding downward from the carburetor body A, and a main jet pipe 7 and a jet nozzle 2 are arranged inside the main jet constituting projection 9. The jet nozzle 2 of this embodiment is screwed onto the upper end of a main jet passage bolt 11 which connects the fuel cock outer cylinder portion 3 and the main jet constituting protruding portion 9. Then, a fuel oil passage is formed at the bottom of the float chamber container 8 which is fitted and fixed to the lower surface of the carburetor body A, and the fuel oil passage 22 of the fuel cock outer cylinder portion 3 communicates with the jet oil passage 12 of the fuel cock 1. It is configured accordingly. A packing is interposed between the float chamber container 8 and the fuel cock outer cylinder part 3 so that fuel does not leak when moving from the float chamber container 8 to the fuel oil passage 22 of the fuel cock outer cylinder part 3. Is configured.

The fuel is supplied from the fuel oil passage 13 of the fuel cock outer cylinder portion 3 to the jet nozzle 2 via the jet oil passage 12 of the fuel cock 1 and the oil passage in the main jet passage bolt 11. ing. A drain oil passage 20 is provided from a part of the fuel cock outer cylinder portion 3. The drain oil passage 20 is returned to the drain circuit of the fuel tank by the drain pipe inserted into the drain pipe insertion portion 4. There is. The drain oil passage 20 communicates with the drain passage D, and the drain passage D communicates with the jet oil passage 12.

FIG. 3 shows an embodiment of a cab integrated type. The float chamber container 8 and the fuel cock outer cylinder are integrally formed, and a main jet passage bolt 11 is screwed into the float chamber container 8. The point that the jet nozzle 2 is screwed onto the upper end portion of the main jet passage bolt 11 and projects into the main jet chamber J is the same as in the embodiment of FIG. The same applies to the point where a drain passage D is provided in the fuel cock 1, the drain passage D is communicated with the drain oil passage 20, and the drain pipe insertion portion 4 returns to the fuel tank. A pipe 25 attached to the fuel pipe insertion portion 6 communicates with a fuel oil passage of the carburetor body A through a joint 26, and the fuel oil passage of the carburetor body A communicates with a float chamber F. Reference numeral 10 in FIG. 2 is an oil seal.

[0013]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. That is, since it is configured as claimed in claim 1, in a gasoline engine mounted on a seasonal working machine such as a binder or a rice transplanter, it remains inside the float chamber of the carburetor during long-term storage during the off season. The deteriorated gasoline deteriorates, and the part of the jet nozzle immersed in the deteriorated gasoline becomes clogged due to corrosion or accumulation of gum substances, and the parts of the jet nozzle, which is a precision part, do not operate. Occasionally, problems such as start-up failure occurred. According to the present invention, the float chamber and the jet nozzle chamber are separated, and the two are connected by a communication passage, and a fuel cutoff valve is provided in the connection passage, and the fuel cutoff valve is interlocked with the fuel cock. By closing the seasonal work, the float chamber and the main jet chamber are shielded, the gasoline in the main jet chamber is lost by vaporization and evaporation, and the deteriorated gasoline inside the float chamber does not come into contact with the main jet. Is. As a result, it was possible to eliminate the start-up failure of the carburetor body A at the start of the season.

According to the second aspect, the operator can connect the float chamber F and the main jet chamber J to the drain oil passage 20 by further rotating the fuel cock 1 by 180 degrees from the closed state. Therefore, by removing the fuel inside the float chamber F and the main jet chamber J before storing for a long time, it was possible to eliminate the start-up failure after the season.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a carburetor with a fuel discharge system interruption mechanism of an engine of the present invention.

FIG. 2 is a side sectional view of a carburetor with a fuel discharge system interruption mechanism of an engine in which a drain passage D is provided in a fuel cock 1.

FIG. 3 is a side sectional view of a carburetor-integrated embodiment provided with a drain passage D.

FIG. 4 is an operation diagram showing each passage position during operation, during stopped storage, and during stopped drain.

[Explanation of symbols]

 A Carburetor main body 1 Fuel cock 2 Jet nozzle 3 Fuel cock outer cylinder part 4 Drain pipe insertion part 5 Fuel pipe insertion part 6 Fuel pipe insertion part 7 Main jet pipe 8 Float chamber container 9 Main jet constituent projection part 12 Jet oil passage 13 Fuel oil passage

Claims (2)

[Scope of utility model registration request] 1. In a carburetor of an engine, a float chamber and a main jet chamber are separated from each other, and the two are connected by a connecting path, and a connecting path to the main jet chamber is provided.
A carburetor with a fuel discharge system cutoff mechanism for an engine, characterized in that a fuel cutoff valve is provided as close as possible to the main jet chamber, and the fuel cutoff valve is configured to open and close in conjunction with a fuel cock. 2. A vaporizer with a fuel discharge system cut-off mechanism for an engine, wherein the fuel cock according to claim 1 is provided with a drain passage, and the float chamber and the drain circuit are made to communicate with each other in conjunction with the closing of the fuel cock. vessel.