CN116950819A - Oil tank for liquid fuel internal combustion engine - Google Patents

Abstract

The invention relates to a fuel storage device for an internal combustion engine, specifically a fuel tank for a liquid fuel internal combustion engine, which includes a fuel tank body and an oil level indicator. The oil level indicator is installed inside the fuel tank body along the depth direction of the fuel tank body. The fuel tank A ventilation mechanism is installed on the body. The ventilation mechanism includes a ventilation piece. The ventilation piece is installed on the top of the fuel tank body and is located on one side of the oil level indicator. The ventilation mechanism also includes a ventilation pipe located inside the fuel tank body. One end of the breather pipe is flexibly connected to the breather piece to form an air passage connecting the inside and outside of the fuel tank body. The other end of the breather pipe is connected to a first float that maintains communication between the breather pipe and the space above the liquid level inside the fuel tank body. . This solution solves the problem of how to increase the oil storage capacity of the fuel tank.

Description

A kind of fuel tank for liquid fuel internal combustion engine

Technical field

The present invention relates to a fuel storage device for an internal combustion engine, specifically a fuel tank for a liquid fuel internal combustion engine.

Background technique

Liquid fuel internal combustion engines are generally equipped with a fuel tank for storing fuel. During the use of the internal combustion engine, the fuel tank needs to be equipped with a vent hole to ensure that the air pressure in the fuel tank is balanced and the fuel can be transported from the fuel tank to the internal combustion engine. Due to the existence of the vent, for safety reasons, the fuel tank needs to be equipped with a device to prevent oil leakage from the vent when tipped. The existing device to prevent oil leakage is generally a mechanical dump valve. When the fuel tank is dumped, the dump valve automatically closes the vent hole to prevent fuel from flowing out from the vent hole. The dump valve is generally installed on the fuel tank or assembled outside the fuel tank through a gas nozzle. The installation of the dump valve needs to meet the requirement that when the fuel tank is tilted in all directions, neither the dump valve nor its gas nozzle can be submerged by the oil surface. Therefore, when designing a fuel tank, sufficient space must be reserved in the upper part of the fuel tank to ensure that the safety of the fuel tank meets the requirements.

As the requirements for the overall volume of the internal combustion engine are getting higher and higher, it is usually strictly limited to a certain range. However, at the same time, higher requirements are also put forward for the endurance of the entire internal combustion engine, emphasizing the longest possible endurance time. . When the volume of the entire internal combustion engine is strictly limited, the total volume of the fuel tank is usually also limited. In this case, how to increase the oil storage capacity of the fuel tank to extend the endurance time of the internal combustion engine has become a problem to be solved. Especially for an overall flat fuel tank (the height of the fuel tank is less than the smaller of the width and length of the fuel tank), how to solve this problem is particularly important.

Contents of the invention

The object of the present invention is to provide a fuel tank for a liquid fuel internal combustion engine to solve the problem in the prior art of how to increase the oil storage capacity of the fuel tank.

In order to achieve the above object, the basic solution of the present invention provides a fuel tank for a liquid fuel internal combustion engine, including a fuel tank body and an oil level indicator. The oil level indicator is installed inside the fuel tank body along the depth direction of the fuel tank body. The fuel tank A ventilation mechanism is installed on the body. The ventilation mechanism includes a ventilation piece. The ventilation piece is installed on the top of the fuel tank body and is located on one side of the oil level indicator. The ventilation mechanism also includes a ventilation pipe located inside the fuel tank body. One end of the breather pipe is flexibly connected to the breather piece to form an air passage connecting the inside and outside of the fuel tank body. The other end of the breather pipe is connected to a first float that maintains communication between the breather pipe and the space above the liquid level inside the fuel tank body. .

The beneficial effect of this basic solution is that with such a setting, compared with the existing technology, the rated volume of the fuel tank can be increased, especially when the total volume of the fuel tank equipped with an oil level indicator is strictly limited, the increase The fuel storage capacity of the fuel tank is increased, and the endurance time of the internal combustion engine is extended.

Furthermore, the breather tube is a flexible tube, and an anti-winding component is provided inside the oil tank body to prevent the breather tube from wrapping around the oil level indicator. Adopting such an arrangement is helpful to avoid the problem that the breather tube wraps around the oil level indicator and affects the movement range of the first float, causing the breather tube to fail.

Further, the anti-winding assembly includes a rigid member that is sleeved on the outside of the breather pipe. The anti-winding assembly also includes a stopper fixed inside the oil tank body that prevents the rigid member from rotating around the oil level indicator. The rigid component here is used to prevent the wrapped part of the flexible tube from bending within the fuel tank body. Adopting such an arrangement is conducive to making the structure of the anti-winding component relatively simple, thereby improving reliability.

Further, the distance between the rigid component and the first float is no greater than the length of the rigid component. Adopting such a setting is helpful to further improve the reliability of the snorkel.

Description of the drawings

Figure 1 is a schematic diagram of an embodiment of a fuel tank for a liquid fuel internal combustion engine of the present invention.

Detailed ways

The following is further detailed through specific implementation methods:

The reference numerals in the drawings of the description include: fuel tank body 1, oil level indicator 2, breather part 3, breather pipe 4, first float 5, rigid part 6, and stopper 7.

The embodiment is basically as shown in Figure 1: a fuel tank for a liquid fuel internal combustion engine, including a fuel tank body 1. In this embodiment, the fuel tank body 1 is preferably a structure with a depth smaller than the smaller of the width and length of the fuel tank body 1. , that is, the fuel tank body 1 is flat. An oil level indicator 2 is installed inside the oil tank body 1. The oil level indicator 2 is installed inside the oil tank body 1 along the depth direction of the oil tank body 1. The upper end of the oil level indicator 2 is connected and fixed to the top of the oil tank body 1, and the lower end of the oil level indicator 2 is connected and fixed to the top of the oil tank body 1. Close to the bottom of the tank body 1. A venting mechanism is installed on the fuel tank body 1. In this embodiment, the venting mechanism includes a venting piece 3. The venting piece 3 is installed on the top of the fuel tank body 1 and is located on one side of the oil level indicator 2, so that the venting piece 3 penetrates the fuel tank. The passage at the top of the body 1; specifically, the vent 3 can preferably be a vent nozzle in the prior art. The vent nozzle has a simple structure, which is beneficial to reducing costs; of course, the vent 3 can also be a dump in the prior art. valve, thereby making the oil leakage prevention performance of the ventilation mechanism more reliable.

The ventilation mechanism also includes a ventilation pipe 4 located inside the fuel tank body 1 . One end of the ventilation pipe 4 is flexibly connected to the ventilation member 3 to form an air passage connecting the inside and outside of the fuel tank body 1 . The flexible connection method between the breather pipe 4 and the breather piece 3 may be a mechanical connector with multiple rotation angles, similar to the universal joint in the prior art. In this embodiment, the vent tube 4 is a flexible tube made of flexible material that can be bent at any angle. After the vent tube 4 is connected to the vent part 3, the flexibility of the vent tube 4 itself can be used to achieve a flexible connection with the vent part 3. effect. One end of the breather pipe 4 away from the breather member 3 is connected to a first float 5 that maintains communication between the breather pipe 4 and the space above the liquid level inside the fuel tank body 1 . In this embodiment, the first float 5 is in a long strip shape, and the end of the vent pipe 4 extends along the length direction of the first float 5; specifically, the first float 5 can be cylindrical, and the axial direction of the first float 5 The length is greater than the radial width; of course, the first float 5 can also be truncated. In this embodiment, the length of the structure formed by connecting the breather pipe 4 and the first float 5 is greater than the depth of the fuel tank body 1 .

In this embodiment, an anti-winding component is provided inside the fuel tank body 1 to prevent the breather pipe 4 from wrapping around the oil level indicator 2 . The anti-winding assembly includes a rigid piece 6 that is sleeved on the outside of the breather pipe 4, so that the part of the breather pipe 4 wrapped by the rigid piece 6 is less likely to bend and deform; the anti-winding assembly also includes a fixed inside the fuel tank body 1 to prevent the rigid piece 6 from wrapping The stopper 7 of the oil level indicator 2 rotates once. Specifically, the stopper 7 is connected and fixed on the mounting seat of the oil level indicator 2. When the rigid member 6 rotates around the connection between the breather pipe 4 and the breather member 3, the rigid member 6 The component 6 can only rotate within a range of 180° under the blocking effect of the stopper 7, but cannot rotate once, and thus the oil level indicator 2 cannot be wound. The distance between the rigid part 6 and the first float 5 is not greater than the length of the rigid part 6 , thereby preventing the first float 5 from being wrapped around the oil level indicator 2 under the action of the breather pipe 4 . In this embodiment, the rigid member 6 is preferably a second float, so that the rigid member 6 can prevent the wrapped part of the breather tube 4 from bending and at the same time play a certain buoyancy support role for the breather tube 4 .

With this arrangement, the inside of the tank body 1 maintains air pressure balance with the outside world through the ventilation mechanism. When the liquid level changes, the first float 5 will drive the end of the breather pipe 4 to move accordingly, so that the inside of the tank body 1 does not need to A large amount of space is reserved for the installation of the ventilation mechanism, which increases the rated volume of the fuel tank and increases the oil storage capacity of the fuel tank, which is beneficial to extending the endurance time of the internal combustion engine.

The above are only embodiments of the present invention, and common knowledge such as the known specific structures and characteristics of the solutions are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These should also be regarded as the protection scope of the present invention and will not affect the implementation of the present invention. effectiveness and patented practicality.

Claims (12)

1. A fuel tank for a liquid fuel internal combustion engine, including a fuel tank body and an oil level indicator. The oil level indicator is installed inside the fuel tank body along the depth direction of the fuel tank body. A ventilation mechanism is installed on the fuel tank body. Its characteristics The ventilation mechanism includes a breather, which is installed on the top of the oil tank body and is located on one side of the oil level indicator; the breather mechanism also includes a breather tube located inside the fuel tank body, with one end of the breather tube The vent pipe is flexibly connected to form an air passage connecting the inside and outside of the fuel tank body. The other end of the vent pipe is connected to a first float that maintains communication between the vent pipe and the space above the liquid level inside the fuel tank body. 2. A fuel tank for a liquid fuel internal combustion engine according to claim 1, characterized in that: the breather tube is a flexible tube, and an anti-winding assembly is provided inside the tank body to prevent the breather tube from wrapping around the oil level indicator. . 3. A fuel tank for a liquid fuel internal combustion engine according to claim 2, characterized in that: the anti-winding assembly includes a rigid member that is sleeved on the outside of the breather pipe, and the anti-winding assembly further includes a fixed member fixed inside the fuel tank body. A stop that prevents the rigid member from rotating one revolution around the oil level indicator. 4. A fuel tank for a liquid fuel internal combustion engine according to claim 3, characterized in that the distance between the rigid member and the first float is not greater than the length of the rigid member. 5. A fuel tank for a liquid fuel internal combustion engine according to claim 4, characterized in that the rigid member is a second float. 6. A fuel tank for a liquid fuel internal combustion engine according to any one of claims 1 to 5, characterized in that the depth of the fuel tank body is smaller than the smaller of the width and length of the fuel tank body. 7. A fuel tank for a liquid fuel internal combustion engine according to claim 6, characterized in that the length of the structure formed by connecting the breather pipe and the first float is greater than the depth of the fuel tank body. 8. A fuel tank for a liquid fuel internal combustion engine according to claim 7, characterized in that one end of the breather pipe connected to the first float extends along the length direction of the first float. 9. A fuel tank for a liquid fuel internal combustion engine according to claim 8, characterized in that: the first float is elongated. 10. A fuel tank for a liquid fuel internal combustion engine according to claim 9, characterized in that: the first float is cylindrical, and the axial length of the first float is greater than the radial width. 11. A fuel tank for a liquid fuel internal combustion engine according to claim 10, characterized in that the first float is in the shape of a truncated cone. 12. A fuel tank for a liquid fuel internal combustion engine according to any one of claims 1 to 6, characterized in that the venting member is a venting nozzle or a dump valve.