JPH0713548U - Fuel tank for engine - Google Patents

Abstract

(57) [Summary] [Objective] The purpose of the fuel tank for an engine of the present invention is to provide a fuel tank for an engine which can obtain a constant quality fuel without requiring special management and without soiling the hands. is there. A fuel tank for an engine of the present invention is a fuel tank for supplying a mixed gasoline in which oil is mixed at a constant mixing ratio to a fuel supply system of an engine, in which the connection between the fuel supply system and the fuel tank 4 is detachable It is characterized in that the fuel tank 4 can be attached or detached to or from two fuel tanks by switching between them.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fuel tank connected to an engine fuel supply system to supply fuel to the engine.

[0002]

[Prior art]

 Conventionally, when the gasoline of a conventional engine is emptied, gasoline is injected into an empty fuel tank by going to a gas station. However, if the engine is a two-cycle engine, engine oil must be mixed in at a specified ratio in addition to gasoline, and some gasoline stations have mixed gasoline prepared by mixing the oil in advance. However, it is rare in reality, and even if there is one, the price will be higher with a separate fee. However, it is difficult to mix oil into the fuel tank after putting gasoline in the fuel tank by itself, it is difficult not only to keep the oil clean, but also to keep the amount of oil mixed to a constant level, and also to improve engine durability. There was a drawback that it had an adverse effect.

As a countermeasure, there is a device described in Japanese Utility Model Laid-Open No. 4-6764. This conventional example will be described with reference to FIGS. FIG. 4 is a front view of a conventional fuel tank attached state, FIG. 5 is a partial bottom view of the conventional fuel tank, and FIG. 6 is a detailed view of a conventional cartridge. In the figure, 102 is a fuel tank. Reference numeral 101 is a cylindrical cartridge, and is formed in a size capable of enclosing a fixed amount of oil having a mixing ratio of 50: 1 with respect to gasoline supplied to the fuel tank 102. 103 is a screw formed on one end opening side of the cartridge 101. Reference numeral 104 denotes a lid, which can be detachably screwed with a screw 103. The cartridge 101 and the lid 104 may be made of paper which will be corroded when it is disposable.

Reference numeral 105 denotes both engaging projections, which are two arc-shaped projections projecting downward so that they can be engaged with both end sides of the cartridge 101 at a portion of the outer peripheral surface serving as the lower surface of the fuel tank 102. Two pieces are set as a set and six similar pieces are provided so as to project. The configuration is such that six cartridges 101 can be detachably attached to both engaging protrusions 105 of each set. The operation of the conventional example will be described. As shown in FIGS. 4 and 5, six cartridges are attached to the lower surface of the fuel tank 102, which is easily affected by vibrations and heat, and can be conveniently carried.

This means that when the work with the brush cutter is performed for a long time during the day, the fuel must be replenished several times, but at the time of refueling, the fuel tank 102 is replenished with gasoline, and one When the above cartridge is removed from both engaging projections 105 and the lid 104 is opened to supply the oil in the cartridge 101 to the fuel tank 102, it is possible to accurately refuel at a low mixing ratio of 50: 1.

Although the used cartridge can be disposable as it is, the unused cartridge 101 can be confirmed by looking at the lower surface of the fuel tank 102. If the used cartridge is re-engaged with both the engaging projections 105 by making the cartridge 101 transparent, the cartridge can be reused, and it is not used when it is attached to the outside of the fuel tank 102. And used ones can be easily identified.

[0007]

[Problems to be solved by the device]

 In the case of the above-mentioned conventional example, the cartridge is exposed to the outside, so if the working machine is dropped together with the engine, the cartridge will be damaged or dropped, and in fact, some gasoline will remain in the fuel tank. Since the gasoline is often replenished under certain conditions, it is not always possible to obtain an accurate mixture ratio, and as a result a rich mixture ratio is not only adversely affected, but engine performance, for example ignition performance, is adversely affected. There were drawbacks such as thickening smoke emission and deteriorating the surrounding work environment.

An object of the present invention is to provide a fuel tank for an engine that can obtain fuel of constant quality without requiring special management and without soiling the hands.

[0009]

[Means for Solving the Problems]

 The first invention is a fuel tank which is connected to a fuel supply system of an engine and supplies a fuel in which oil is mixed at a predetermined mixing ratio to the engine, in which the connection between the fuel supply system of the engine and the fuel tank is removable. Moreover, the fuel tank can be attached to and detached from the engine. The second invention is characterized in that the two fuel tanks described in the first invention are used and the connection to the fuel supply system of the engine is switched for each fuel tank.

[0010]

[Action]

 With the above-mentioned configuration, when the fuel in the fuel tank, for example, the mixed gasoline in which the oil is mixed at the predetermined mixing ratio becomes empty, the engine fuel system and the fuel tank are first connected. With the fuel tank removed, remove the empty fuel tank from the engine and at the same time fill a separately prepared fuel tank, for example, a fuel tank filled with gasoline mixed with oil at a predetermined mixing ratio. , After connecting the fuel supply system, remove the empty fuel tank and then install it. If you have two fuel tanks, you can continue working by switching to the other fuel tank while one fuel tank is empty.

[0011]

【Example】

 A first embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is a front view of the entire engine fuel tank according to the first embodiment, and FIG. 2 is a detailed cross-sectional view of the fuel tank portion attached to the engine according to the first embodiment. In the figure, reference numeral 1 is an engine of a two-cycle type. Reference numeral 2 is a carburetor of the engine 1, and 3 is a fuel tank connected to a fuel supply system including a fuel pump (not shown) and a carburetor 2. A band 5 supports the engine 1. A cartridge storage case 6 is attached to the band 5. 7 is an anti-vibration rubber which is attached to the entire inner surface of the cartridge storage case 6. Reference numeral 4 denotes a cartridge type fuel tank, which is contained in a cartridge storage case 6 surrounded by a vibration-proof rubber 7.

Reference numeral 9 denotes a lid that covers the end of the cartridge storage case 6. Reference numeral 8 is a publicly known toggle type handle-operated one-touch stopper which positions and fixes the lid 9 to the cartridge storage case 6. Reference numeral 10 is a screw type base for mounting the fuel tank 4, which is mounted on the lid 9. Reference numeral 12 denotes a fuel suction pipe with a weight, which is inserted into the fuel tank 4 and attached to the lid 9. Reference numeral 11 is a weight or a weight that also serves as a filter, and is attached to the tip of the fuel suction pipe 12. A connector 13 is attached to the lid 9 and connects the fuel suction pipe 12 and the fuel hose 3.

Reference numeral 15 denotes an air bleed hose which has a spring property and is inserted into the fuel tank 4 and has an inlet made of a ventilation sheet that allows a known gas to pass therethrough but does not allow a liquid to pass therethrough, and the intake port is a fuel tank. It is attached to the lid 9 so as to abut on the top of the inner wall of the fuel tank 4 and communicates the air portion in the fuel tank 4 with the atmosphere. Reference numeral 14 denotes an intake port, which is provided at the tip of the air bleed hose 15 and is made of a known ventilation sheet that allows gas to pass but does not allow liquid to pass.

Next, the operation of the first embodiment will be described. In the above state, the connection between the fuel supply system of the engine 1 and the fuel tank 4 is detachable, and the fuel tank 4 is also detachably attached to the engine 1. When the fuel in the fuel tank 4 of the engine 1, for example, mixed gasoline in which oil is mixed at a predetermined mixing ratio, becomes empty, the fuel supply system of the engine 1 and the fuel tank 4 are disconnected. In the state, that is, the one-touch stopper 8 is removed, the lid 9 which is positioned and fixed is removed from the cartridge storage case 6 together with the empty fuel tank 4, and separately prepared after removing the empty fuel tank 4 from the screw type base 10. A fuel tank 4 filled with fuel, in this case, a fuel tank 4 filled with mixed gasoline mixed with oil at a predetermined mixing ratio, and an empty fuel tank 4 with a screw cap (not shown) removed After removing it, attach it to the screw type base 10 and insert it into the cartridge storage case 6 as it is to fill the fuel by locking the one-touch stopper 8 of the lid 9. The fuel tank 4 can be easily connected to a fuel supply system of the engine 1.

A second embodiment according to the present invention will be described with reference to FIG. FIG. 3 is a plan view of the second embodiment. Depending on the model, as shown in FIG. 3, two fuel tanks similar to the fuel tank 4 of the first embodiment are used, and the connection of each fuel tank 4 to the fuel supply system of the engine 1 can be switched by a switching valve. . A switching valve 16 is provided between the two fuel tanks and the fuel supply system. Since the structure of the fuel tank 4 is the same as that of the fuel tank 4 of the first embodiment, its explanation is omitted. The operation of the second embodiment will be described. With one fuel tank 4 emptied, the fuel switching valve 16 can switch to the other fuel tank to continue the operation.

[0016]

[Effect of device]

 Since the present invention is configured as described above, it is possible to easily perform refueling of a constant quality without requiring special management and keeping hands clean.

[Brief description of drawings]

FIG. 1 is a front view of an entire engine fuel tank according to a first embodiment of the present invention.

FIG. 2 is a detailed cross-sectional view of a fuel tank portion attached to the engine of the first embodiment.

FIG. 3 is a plan view of the second embodiment.

FIG. 4 is a front view of a conventional example of a fuel tank attached state.

FIG. 5 is a partial bottom view of a conventional fuel tank.

FIG. 6 is a detailed view of a conventional cartridge.

[Explanation of symbols]

1 ... Engine, 2 ... Vaporizer, 3 ... Fuel hose, 4 ... Fuel tank, 5 ... Band, 6 ... Cartridge storage case, 7
... Anti-vibration rubber, 8 ... One-touch stopper, 9 ... Lid, 10 ...
Screw type base, 11 ... Weight, 12 ... Fuel intake pipe, 13 ...
Connector, 14 ... Intake port, 15 ... Air bleed hose,
16 ... Switching valve.

Claims (2)

[Scope of utility model registration request] 1. A fuel tank which is connected to a fuel supply system of an engine and supplies to the engine a fuel in which oil is mixed at a predetermined mixing ratio, the fuel supply system of the engine (1) and the fuel tank (4). A fuel tank for an engine, wherein the fuel tank (4) can be attached to and detached from the engine (1) in a removable manner. 2. The fuel tank for an engine according to claim 1, wherein there are two fuel tanks and the connection for each fuel tank to the fuel supply system of the engine is switched and used.