JP2003293808A - Fuel change-over device for kerosene engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel switch-over device for an engine to simplify, quicken and facilitate the work of a kerosene engine. <P>SOLUTION: A fuel change-over valve 13 is situated directly at the lower part of the nozzle of a carburetor, a float chamber 5 where a liquid level from a gasoline tank is regulated is filled with gasoline, and float chamber is communicated with a gasoline inflow hole 17 of a partition wall 6 situated on the outside of the fuel change-over valve 13. On starting, gasoline is fed as fuel to the carburetor 1 and starting is practicable. When the engine is started, the fuel is automatically switched to kerosene by a manual change-over device 2 or an actuator 12, and an electromagnetic valve 22. The liquid level of the kerosene is adjusted, kerosene fed from an independent kerosene float chamber 7 is fed to the change-over valve and the change-over valve 13 is communicated with a kerosene inflow hole 21 by the fuel change-over valve. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention starts a kerosene engine with gasoline for convenient use,
The present invention relates to a fuel switching device capable of switching to kerosene manually or automatically.

[0002]

2. Description of the Related Art Conventionally, a general kerosene engine on the market has a gasoline tank for starting and a kerosene tank, and each fuel is supplied to a float chamber of a carburetor through a three-way cock. At startup, gasoline is supplied to the float chamber of the carburetor to start the engine, and then the three-way cock is switched to supply kerosene. Since kerosene has a poor vaporization property, it cannot be started if kerosene is present in the float chamber during start-up. For this reason,
When restarting, temporarily close the three-way cock, pull out the kerosene from the drain cock provided at the bottom of the float chamber, close the drain cock, tilt the switching cock to the gasoline side, supply the gasoline to the chamber, and then start. ing. Therefore, it takes time and time for the user to start the kerosene engine. Not only that, but because the kerosene staying in the float is thrown away, it wastes fuel and pollutes the soil.

[0003]

As described above, in the conventional kerosene engine, the operation of the three-way cock and the drain cock at the time of starting is performed to extract kerosene from the float chamber and to supply gasoline, so the work is very complicated. However, it took time and labor, and there were problems such as waste of fuel due to the disposal of kerosene and soil pollution.
The present invention solves the above problems, and an object of the present invention is to provide a fuel switching device for a kerosene engine, which can simplify, speed up, and facilitate the starting work.

[0004]

In order to achieve the above object, the present invention changes the structure of the vaporizer. The problem is that the float chamber is provided below the vaporizer nozzle, and it cannot be started due to the presence of kerosene, which is poorly vaporizable, so the solution is to prevent fuel from accumulating in the lower portion of the nozzle. The details will be described below in the embodiments.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. The first embodiment is shown in FIG. As shown in FIG. 1, a carburetor 1, a switching device 2, a gasoline tank 3, a kerosene tank 4, a gasoline float chamber 5, a kerosene float chamber 7, a gasoline supply pipe 8, and a kerosene supply pipe 9 are provided. The fuel switching device 2 is directly attached to the lower portion of the nozzle 10 of the carburetor 1, and the gasoline float chamber 5 and the kerosene float chamber 7 whose liquid levels are adjusted are connected to each other by the gasoline supply pipe 8 and the kerosene supply pipe 9, respectively. Has become. According to this method, even if the engine key is turned off after starting with gasoline and then operating with kerosene, the amount of kerosene remaining in the lower portion of the nozzle 10 is extremely small. Therefore, if the switching cock 2 is tilted to the gasoline side at the time of restart, it can be easily started.

A second embodiment is shown in FIG. In this plan, the gasoline float chamber 5 is provided directly below the vaporizer, but a partition wall 6 is provided between the fuel reservoir 5A in the float chamber and the lower portion of the nozzle, and passes through the connecting pipe 8A provided in the float chamber 5 and the gasoline supply pipe. It is connected to the switching device 2 via 8. It has the same function as the first embodiment.

A third embodiment is shown in FIG. The embodiment is the same as the second embodiment, but the kerosene float chamber 7 is used.
Is placed directly under the carburetor.

A fourth embodiment is shown in FIG. This proposal uses an actuator 12 instead of the manual switching cock 2 in the second embodiment. First, the engine was started with gasoline, and kerosene was automatically supplied when the engine was started.

A switching valve 13 is provided below the nozzle and is connected to a rod 14 of the actuator. The rod 14 is connected to the diaphragm 15 of the actuator. When the engine is stopped, the valve is pushed upward by the spring 16A provided on the side opposite to the diaphragm rod. When the valve is in the stop position, the gasoline is set to flow through the inflow hole 17 formed in the partition wall 6.

The boost pipe 18 of the actuator is connected to a boost take-out pipe 20 provided on the downstream side of the intake throttle valve 19 of the carburetor. Therefore, when the engine starts, the actuator diaphragm 1 is boosted by boosting.
5 overcomes the spring force and pulls down the rod 14,
The switching valve 13 descends and stops at the set position. This state is shown in FIG. At this setting position, an inflow hole 21 is provided in the partition wall 6 that separates the fuel pool in the float from the lower part of the nozzle of the carburetor, and connects the external float chamber 7 for kerosene. Therefore, as soon as the engine is started, the gasoline inflow hole 17 is automatically closed by the actuator and the kerosene inflow hole 21 is opened to switch to kerosene.

Further, the boost pipe 1 of the actuator
A boost delay device may be provided between 8 and the boost extraction tube 20 to delay the time to switch to kerosene.

[0012]

[0009]

In the above description, a switching device that operates up and down is explained, but it can also be applied to the rotary switching device of the second embodiment (FIG. 2). In this case, a torque rod is provided on the shaft of the switching device, and the rod of the actuator is connected to the tip of the torque rod at substantially right angles. As a result, the rotary switching device can be automatically switched.

A fifth embodiment is shown in FIG. This replaces the actuator 12 of the fourth embodiment with an electromagnetic valve 22. That is, the rod 14 connected to the switching valve 13 is directly connected to the movable portion 23 of the electromagnetic valve 22, and when energized, the electromagnetic force overcomes the spring 16B, the switching valve 13 descends, and the kerosene acts as a carburetor. It flows into the bottom of the nozzle. The electromagnetic valve 22 is energized by a power source 24 via a thermostat 25. Then, the thermostat 25 is attached to an appropriate position of the engine. That is, since the thermostat is opened when the engine is cold-started, the gasoline operation is continued until the engine is warmed up and the thermostat is closed.

[0014]

EFFECTS OF THE INVENTION By using the present invention, it is possible to eliminate troublesome work and waste of time when starting a kerosene engine, and to avoid waste of fuel remaining in the float and soil contamination.

[Brief description of drawings]

FIG. 1 is a basic view of the present invention and is a configuration diagram in which a switching valve for gasoline and kerosene is provided directly below a nozzle of a vaporizer.

[Fig. 2] A float chamber is provided under the vaporizer,
FIG. 7 is a view in which a switching device is attached so as to prevent fuel from remaining in a lower portion of the nozzle, which is separated from a fuel pool by a partition wall.

FIG. 3 is a diagram in which the configuration is the same as in FIG. 2, but the chamber under the vaporizer is for kerosene and the structure of the switching device is changed.

FIG. 4 is a diagram of a switching device that is automated by replacing a manual switching device with an actuator.

5 is a diagram showing a switching valve position and an inflow state of kerosene when the switching device operates in FIG. 4. FIG.

FIG. 6 is a diagram in which an electromagnetic valve is used instead of an actuator for automatic switching.

FIG. 7 is a diagram showing a switching valve position and a kerosene introduction state when an electromagnetic valve operates.

[Explanation of symbols]

1 vaporizer 2 switching device 3 gasoline tank 4 Kerosene tank 5 Gasoline float chamber 5A gasoline sump 6 partitions 7 Kerosene float chamber 7A kerosene pool 8 gasoline supply pipe 8A connecting pipe for gasoline 9 Kerosene supply pipe 9A Kerosene connection tube 10 nozzles 11 Main jet 12 actuators 13 Switching valve 14 rod 15 diaphragm 16A spring 16B spring 17 Gasoline inlet 18 boost pipe 19 Intake throttle valve 20 Boost extraction tube 21 Kerosene inflow hole 22 Electromagnetic valve 23 Electromagnetic valve moving part 24 power 25 thermostat 26 Ignition switch

Claims (2)

[Claims] 1. A kerosene engine for starting an engine with gasoline and driving the engine with kerosene, comprising a gasoline tank, a carburetor float chamber connected to the gasoline tank, and a kerosene tank and a float chamber connected to the kerosene tank. , A fuel switching device in which the float chamber for each fuel is independent and a cock for selecting these fuels is directly attached to the bottom of the nozzle of the carburetor. 2. A fuel switching device for automatically switching the switching device with an actuator or an electromagnetic valve.