JPH0133817Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention uses a switching lever in the float chamber to switch between volatile oil as a starting fuel and kerosene as a driving fuel for automobiles, aircraft, power spray vehicles, etc. The present invention relates to a fuel switching device that can be switched easily and quickly by operation and that can recover driving fuel.

[Conventional technology]

Conventionally, for example, when it is necessary to switch between kerosene stored in the float chamber and volatile oil in a car equipped with a gasoline engine, (i) the kerosene is first discharged and discarded from the float chamber, and (ii) the volatile oil is transferred to the float chamber. Inject it into the chamber, (iii) drive the engine to run the car body, and after driving,
After the volatile oil is discharged and disposed of, (iv) new kerosene is again injected and stored in the float chamber. In this process, each time kerosene and volatile oil are switched, the kerosene is discarded, and when restarting, new kerosene is injected and stored in the float chamber, resulting in troublesome effort and time during the switchover, and wasteful consumption of fuel. are forced to do so. Therefore, in order to correct the above-mentioned shortcomings,
A piston is slidably and tightly fitted into a switching chamber that communicates with the volatile oil tank on one side via a fuel pump, while the other side of the switching chamber communicates with a starting fuel tank and a fuel chamber, respectively, and the fuel pump After the engine is started by supplying starting fuel to the fuel chamber and starting the engine, the engine is driven by supplying volatile oil from the volatile oil tank to the combustion chamber.
Furthermore, a fuel supply device has been proposed that automates the fuel switching operation and suppresses wasteful consumption of fuel by sucking fuel from the starting fuel tank into the switching chamber when the fuel pump stops operating. (For example, see Japanese Patent Publication No. 53-43695.) [Problem to be solved by the invention] In the case of the above-mentioned fuel supply device, it is necessary to automate the fuel switching operation and suppress wasteful consumption of fuel. Even if it is possible, for example, even when the engine is temporarily stopped and restarted immediately after, a constant amount of expensive starting fuel will be supplied, and even after the engine has started, the supplied starting fuel will burn out. Since it is forced to burn up to 50% of fuel, it results in wasted fuel consumption and is uneconomical.However, although it can be acknowledged that the fuel supply system mentioned above suggests the recovery of operating fuel, there is no concrete way to recover it. There is a problem in that the means are not disclosed at all.

This idea was proposed in view of the above-mentioned problems, and its purpose is to easily switch between engine starting fuel and engine driving fuel in the float chamber by manually operating a switching lever. Moreover, it is an object of the present invention to provide a fuel switching device that does not cause an excess or shortage of exhaust and supply, and that can recover fuel for driving an engine.

[Means to solve the problem]

In order to achieve the above object, the fuel switching device in this invention connects the upper end of the float chamber through an inflow pipe in which a three-way pot is installed in the kerosene tank, and a second A return pipe equipped with a second check valve and a third check valve is interposed and connected, while the lower end of the liquid feeding pipe whose upper end communicates with the bottom of the volatile oil tank and whose upper end communicates with the float chamber. , 4th
One end and the middle of each cylinder are communicated with the lower end of the supply pipe in which a check valve is installed, and a first cylinder is interposed and housed between the one end and the middle in the cylinder.
A piston rod, which fixes a piston facing the first check valve at one end so that the check valve and the fourth check valve perform a pumping action, is attached to the cylinder so as to be able to move forward and backward. A rotator is attached to the lower end of the switching lever, the middle of which is movably connected to the end that protrudes airtight from the other end of the cylinder, and this rotator and
The three-way pot is movably connected so that communication between the kerosene tank and the float chamber is cut off when the piston rod moves toward the liquid feeding pipe side, and the piston rod side of the cylinder and the The second check valve and the third check valve in the return pipe are communicated with each other through a connecting pipe.

〔Example〕

This invention will be explained below by way of examples with reference to the drawings.

An L-shaped curved pipe 3 is flanged to the tip of a supply pipe 2 such as a hose or iron pipe that is fixed and hanging below the kerosene tank 1, and the lower end of a connecting pipe 4 is connected and branched midway through the curved pipe 3. is connected to an appropriate position between the second check valve 14 and the third check valve 15 in the return pipe T, which will be described later, and to the piston rod 9 side of the cylinder C, with the piston 8 as the boundary, and one end of this cylinder C ( The first check valve 5 is of a type in which a coil spring f ₁ always springs and urges a sphere b ₁ formed near the reduced diameter part r ₁ (here, the right end) toward the reduced diameter part r ₁ to open and close it. A volatile oil tank 7 is attached to the upper end of the liquid supply pipe 6 communicating with the first check valve 5, and a piston rod 9 is attached to the piston 8 which is slidably and tightly fitted into the cylinder C.
One end (here, the right end) is fixed, and the end of the piston rod 9 that protrudes airtight from the other end (here, the left end) of the cylinder C is movably connected to the middle of the switching lever L via a pin P. , a rotor d fixed to the lower end of this switching lever L is rotatably supported inside a support piece 10 having a cross section or a substantially bowl shape, and this rotor d is fixed to the lower end of the switching lever L.
A restraining piece S is connected to a three-way lock K, which will be described later, via a link or an interlocking rod 11 connected to the piston rod 9, and is fixed on the outside of the cylinder C of the piston rod 9.
A coil spring 13 is stretched between the cylinder C and the lid 12 of the cylinder C, and the piston rod 9 is always urged and biased toward the switching lever L side. A second check valve 14 and a third check valve of the same type as the first check valve 5 are installed on the float chamber 16 side and the kerosene tank 1 side of the bent pipe 3, respectively.
A float F is stored in a floating state in a float chamber 16 which is equipped with a check valve 15 and is communicated with and fixed to the upper end of the upright portion of the bent pipe 3. A supply pipe 17 made of a rigid body such as an iron pipe is used to communicate with an intermediate position slightly closer to the piston rod 9 than the first check valve 5 of the cylinder C.
A fourth check valve 21 having the same type as the first check valve 5 and preventing the liquid in the float chamber 16 from flowing back toward the cylinder C side is installed in the middle of the supply pipe 17, and a fourth check valve 21 is installed in the middle of the supply pipe 17. A three-way lock K is installed in the bent part of the inflow pipe 18 that communicates the lower end with the upper end of the float chamber 16, and the switching lever L is rotated in the direction of arrow a (toward the first check valve 5 side). ), the rotation of the rotator d rotates the three-way pot K 90 degrees clockwise via the interlocking rod 11, positioning the opening downward, and opening the kerosene tank 1 and the float chamber 16. Furthermore, when the switching lever L is set to the illustrated position, the opening of the three-way kettle K is set to the illustrated position to enable communication between the kerosene tank 1 and the float chamber 16, The tip of the spray tube n opened in the side wall (left side wall here) of the float chamber 16 faces the inside of the ventilate tube 19, and the throttle valve 20 is rotatably set above it to form the vaporizer Z. I've let it happen.
Also, the supply pipe 2 and the bent pipe 3 are collectively referred to as a return pipe T. In the figure, e is kerosene, g is volatile oil, b ₂ , b ₃ ,
b ₄ , f ₂ , f ₃ , f ₄ , r ₂ , r ₃ , r ₄ are the second, third,
These are the sphere, coil spring, and reduced diameter portion in the fourth check valves 14, 15, and 21.

[Effect]

In this invention, (i) when the switching lever L is set to the solid line position shown in the drawing, the kerosene tank 1 and the float chamber 16 are communicated with each other, so that the kerosene e in the kerosene tank 1 flows into the float chamber 16; Since the fourth check valve 21 is closed, a desired amount of kerosene e is stored in the float chamber 16.

(ii) When the switching lever L is rotated in the direction of arrow a from the state (i), the three-way knob K is rotated 90 degrees clockwise to position the opening downward, and the kerosene tank 1 is turned.
At the same time, most of the kerosene e stored in the float chamber 16 flows through the connecting pipe 4.
At the same time, the volatile oil g stored on the right side of the piston 8 flows out to the float chamber 16 via the supply pipe 17 via the fourth check valve 21, and becomes kerosene e. Instead, the engine (not shown) is started with the float chamber 16 filled with volatile oil g. However, at this time, since the first check valve 5 is placed in a closed state, the volatile oil g on the supply pipe 17 side does not flow back into the liquid feeding pipe 6.

(iii) When the switching lever L is set to the solid line position shown in the figure when the volatile oil g in the float chamber 16 gradually decreases due to combustion caused by engine startup, the volatile oil g in the volatile oil tank 7 is removed by the first check valve 5. At the same time, the kerosene e, which was previously sucked into the left side of the piston 8, flows through the return pipe T through the third check valve 15 and is recycled into the kerosene tank 1. Then, in conjunction with the rotator d, kerosene e is supplied into the float chamber 16 through the opening of the three-way pot K set at the solid line position shown in the figure.
It mixes with the little remaining volatile oil g in the tank and drives the engine. (At this time, the second check valve 14 is closed, so the piston 8
The kerosene e sucked into the left side of the return pipe T does not flow back into the float chamber 16 through the bent pipe 3. ) By setting the switching lever L to the solid line position shown in the figure, the engine can be driven continuously by replenishing the kerosene e from the kerosene tank 1, which gradually reduces the amount of kerosene stored in the float chamber 16 as the engine is driven. Thus, by switching the switching lever L between the solid line position shown in the figure and the setting position in the direction of the arrow a, it is possible to easily switch between the kerosene e and the volatile oil g in the float chamber 16, and also to switch the predetermined amount at any time.

〔effect〕

According to this invention, the kerosene stored in the float chamber is circulated and recovered into the kerosene tank by the movement of the piston rod and the two second and third check valves installed in the return pipe, so that it can be reused. is possible and economical for the user,
In addition, by operating the switching lever, the kerosene in the float chamber is discharged, and the volatile oil in the volatile oil tank is discharged by a piston rod, which is equipped with a liquid supply pipe and a first check valve, and has a piston fixed at one end, which can move back and forth freely. The engine can be reliably started by introducing the installed cylinder into the float chamber via a replenishment pipe with a fourth check valve inside, and after starting, the gasoline is refilled with kerosene by switching the three-way switch. Since the kerosene and gasoline are sufficiently mixed in the float chamber, smooth output transition is possible from startup to normal operation. In addition to being able to adjust the amount of fuel stored in the fuel tank, the fuel can be easily and quickly supplied with sufficient gasoline and kerosene to improve startability at the operator's discretion, ensuring safe engine operation. Furthermore, the three-way knob that is linked to the rotator at the lower end of the switching lever is designed so that communication between the kerosene tank and the float chamber is cut off when the piston rod movably connected to the middle of the switching lever moves to the liquid sending pipe side. A mixed fuel that is installed in the inlet pipe that communicates with the tank, so that the desired amount of volatile oil and kerosene can be mixed by repeatedly operating the switching lever regardless of whether the engine is started or not, thereby improving and promoting engine starting performance. can be generated, and kerosene for engine drive can be recovered.
In addition to being economical, there is no fear that the overall structure will become unnecessarily complicated, so it can be produced robustly and inexpensively, and can be supplied to a wide range of general consumers.

In addition, when the communication between the kerosene tank and the float chamber is too early compared to starting the engine with gasoline, the return of the three-way kettle to the open side should be slightly delayed, and if necessary, the timer can be set by switching the switching lever or rotating the timer. It is preferable to attach it to a suitable place on a child, etc.

[Brief explanation of the drawing]

The drawing is a partially cutaway vertical sectional view of an embodiment of the invention. C...Cylinder, K...Mikata Kotoku, L...
Switching lever, T... Return pipe, 1... Kerosene tank, 4...
... Connection pipe, 5 ... First check valve, 6 ... Liquid feed pipe, 7
... Volatile oil tank, 8 ... Piston, 9 ... Piston rod, 14 ... Second check valve, 15 ... Third check valve,
16... Float chamber, 17... Supply pipe, 18... Inflow pipe, 21... Fourth check valve.

Claims (1)

[Scope of claim for utility model registration] (1) Inflow pipe 1 in which a three-way kettle K is installed in the kerosene tank 1
A return pipe T is connected to the upper end of the float chamber 16 via a tube 8, and has a second check valve 14 and a third check valve 15 installed between the bottom of the float chamber 16 and the kerosene tank 1.
The lower end of the liquid feed pipe 6 whose upper end communicates with the bottom of the volatile oil tank 7 and the upper end of which communicates with the float chamber 16 and the fourth check valve 21
A first check valve 5 that communicates one end and an intermediate portion of each cylinder C with the lower end of a supply pipe 17 in which a first check valve 5 is interposed and housed in the cylinder C between the one end and the intermediate portion; The first check valve 5 is connected to the fourth check valve 21 so that a pumping action is performed.
A piston rod 9, which fixes the piston 8 facing the cylinder C at one end, is attached to the cylinder C so as to be able to move forward and backward. A rotating element d is attached to the lower end, and this rotating element d
and the three-way pot K are movably connected so that communication between the kerosene tank 1 and the float chamber 16 is cut off when the piston rod 9 moves toward the liquid feed pipe 6 side, and the cylinder is connected with the piston 8 as a boundary. C on the piston rod 9 side and the second check valve 1 in the return pipe T.
4. A fuel switching device in which the middle of the third check valve 15 is communicated with the connecting pipe 4. (2) The fuel switching device according to claim 1, wherein the piston rod 9 is always urged and urged toward the switching lever L side.