CN219220596U

CN219220596U - Carburetor and fuel supply device for non-road engine

Info

Publication number: CN219220596U
Application number: CN202320254508.9U
Authority: CN
Inventors: 王义超; 袁彬; 陈旭东; 张易; 罗百万
Original assignee: Chongqing Zongshen General Power Machine Co Ltd
Current assignee: Chongqing Zongshen General Power Machine Co Ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-06-20
Anticipated expiration: 2033-02-20

Abstract

The utility model discloses a carburetor for a non-road engine, which comprises an oil cup and a main metering orifice, wherein the oil cup is positioned at the lower part of the carburetor, and the main metering orifice is positioned in the carburetor, wherein: and a fuel reservoir for storing a portion of the fuel that rises above the primary orifice when the carburetor is tipped in either direction. The utility model can avoid the condition of fuel leakage of the carburetor. The utility model also provides a fuel supply device for the off-road engine.

Description

Carburetor and fuel supply device for non-road engine

Technical Field

The present utility model relates to an off-road engine, and more particularly to a carburetor for an off-road engine and a fuel supply device.

Background

Non-road engines, commonly known as general small gasoline engines, are used in a large number of gardening machines, water pumps, small generators, insecticidal sprayers, chain saws and other devices, and generally comprise a fuel tank for storing fuel and a carburetor for mixing a certain proportion of fuel with air. When the fuel supply device is used, the fuel is supplied from the fuel tank, and then the carburetor atomizes the fuel so as to enable the engine to normally operate. And in the actual use process of the equipment, particularly after the equipment is toppled over for a period of time, the situation that the fuel leakage of the carburetor occurs can be found.

The Chinese patent document CN212898748U discloses a carburetor type gasoline engine oil supply device with a lower oil tank, which comprises an engine and a carburetor, wherein the carburetor is arranged on the engine, the oil tank is arranged at the bottom of the engine, the carburetor is arranged at the upper part of the oil tank, the negative pressure fuel pump is used for controlling the fuel pumping quantity of the carburetor, when the inner cavity of an oil cup is full of fuel, the fuel overflows from an inner cavity port, flows to the outer cavity of the oil cup and flows back to the oil tank through a fuel return pipe, the height of the carburetor is determined by the height of the inner cavity port, the liquid level is kept constant all the time, the oil consumption is favorably reduced, the inner cavity of the oil cup arranged at the inner side of the oil cup is divided into a lower cavity and an upper cavity, the width of the upper cavity is larger than that of the lower cavity, the waiting time when the engine starts to inject fuel is reduced, the fuel storage quantity of the inner cavity of the oil cup is increased by the width of the upper cavity, the change of the oil level of the engine caused by the change of the fuel consumption is reduced, and the stability is improved.

This prior art has the following disadvantages: although the prior art can ensure that the engine can not close the oil way due to full oil and oil leakage under the condition of jolt and vibration, so that the engine can not work normally, and the protection performance is improved, the problem that the fuel oil leakage still occurs in the engine oil supply device in the prior art due to larger vibration or jolt amplitude when the engine is inclined, especially when 90 degrees are inclined.

Disclosure of Invention

The utility model provides a carburetor for a non-road engine, which aims to solve the problem that fuel leakage still occurs when an engine oil supply device in the prior art is toppled over, and comprises an oil cup and a main metering orifice, wherein the oil cup is positioned at the lower part of the carburetor, and the main metering orifice is positioned in the carburetor, wherein: and a fuel reservoir for storing a portion of the fuel that rises above the primary orifice when the carburetor is tipped in either direction.

After analyzing the phenomenon that the carburetor is filled with fuel after the engine is filled, when the engine is filled, the carburetor is filled with fuel, the fuel level in the carburetor is higher than the main metering orifice, and the fuel above the main metering orifice flows out through the main metering orifice, so that the fuel leakage occurs. Therefore, in the scheme, the oil storage part is further arranged, so that when the carburetor is toppled over, the part higher than the main metering orifice of the carburetor is then stored in the oil storage part, and the carburetor cannot flow out of the carburetor through the main metering orifice, so that the condition that the fuel oil of the carburetor leaks can be avoided.

Preferably, the oil storage part comprises an oil pipe communicated with the main measuring hole, and an oil inlet of the oil pipe is not higher than the main measuring hole. In this scheme, set up behind the oil pipe, the oil duct in the oil pipe is as unnecessary fuel's storage space, need not to reform transform the original structure of carburetor, easy operation can also reduce manufacturing cost.

Preferably, the oil pipe is arranged around the inner wall of the oil cup. In this scheme, with the coil setting mode of oil pipe can lengthen oil pipe's length as far as, just also increased the space of oil storage portion to guarantee that the fuel can not take place to reveal.

Preferably, after the oil pipe winding is arranged, an included angle between a connecting line of the oil inlet end face and the main measuring hole and the axial center line of the main measuring hole is larger than 0 degree. In this scheme, after the contained angle is greater than 0 between the connecting wire of oil inlet terminal surface and main measuring hole and the main measuring hole axial central line, can guarantee to have a part that can be higher than the interior fuel liquid level height of carburetor when the engine topples over to arbitrary direction takes place to further guarantee that the problem that the fuel can not take place to reveal.

Preferably, the float is arranged in the oil cup, the oil cup comprises an upper part above the water level where the bottom surface of the float is positioned and a lower part below the water level, and the upper volume of the oil cup is larger than the lower volume. In this scheme, when the carburetor appears empting, because oil cup upper portion volume is greater than oil cup lower part volume, consequently empty the back carburetor current space below and compare before just will increase, consequently can store unnecessary a part fuel, avoid the oil leak condition to appear of fuel.

In a second aspect, the present utility model provides a fuel supply device for a non-road engine, comprising a fuel tank, a bottom cover of the fuel tank being provided with a fuel outlet nozzle, wherein: the oil outlet nozzle is connected with the carburetor through an oil pipe.

The utility model has the following beneficial effects:

1. when the engine topples over, the oil storage part can store partial fuel which can flow out of the carburetor through the main measuring hole originally, so that the problem of leakage of the fuel is avoided, the waste of the fuel can be reduced, and the running cost of the engine can be reduced.

2. The storage of redundant fuel is realized by utilizing the oil pipe, the carburetor itself does not need to be modified, and the manufacturing cost of the carburetor can be reduced.

Drawings

FIG. 1 is a schematic view of a carburetor for an off-road engine and a carburetor of an embodiment 1 of a fuel supply apparatus of the present utility model;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of the carburetor of example 1 after being tipped forward 90;

FIG. 4 is a schematic view of the carburetor of example 1 after being tipped back 90;

FIG. 5 is a schematic view of the carburetor of example 1 after being tipped to the left by 90;

FIG. 6 is a schematic view of the carburetor of example 1 after being tipped to the right by 90;

FIG. 7 is a schematic view of a carburetor for an off-road engine and a carburetor of example 2 of a fuel supply apparatus of the present utility model;

FIG. 8 is a schematic diagram of the carburetor of example 2 after being tipped over 90.

Detailed Description

The following is a further detailed description of the embodiments:

1. definition of the definition

Off-road engine: off-road engines are used in a wide range of applications, including possibly mechanical and off-road vehicles. In many jurisdictions, the term off-road engine is considered to refer to an engine that has mobility or portability, separate from the term stationary engine. Definition of off-road engines may expressly exclude certain off-road vehicles such as aircraft, locomotives, and ocean vessels.

2. Reference numerals in the drawings of the specification include: an oil cup 1, a main measuring hole 2, an oil pipe 3, a liquid level 4 and a float 5.

Example 1 is substantially as shown in figures 1 and 2 of the accompanying drawings: a carburetor for a non-road engine comprises an oil cup 1 and a main metering orifice 2, wherein the oil cup 1 is positioned at the lower part of the carburetor, the main metering orifice 2 is positioned in the carburetor, and the carburetor further comprises an oil storage part for storing partial fuel which is higher than the main metering orifice 2 when the carburetor is toppled towards any direction.

In this embodiment, the oil storage portion includes the oil pipe 3 with main measuring hole 2 intercommunication, and the oil inlet of oil pipe 3 is not higher than main measuring hole 2 setting, and oil pipe 3 is along the setting of oil cup 1 inner wall circle, and oil inlet terminal surface and the contained angle alpha between main measuring hole 2's the connecting wire and the main measuring hole 2 axial central line is greater than 0.

Based on the carburetor as described above, the present embodiment also discloses a fuel supply device for a non-road engine, which includes a fuel tank, a bottom cover of the fuel tank is provided with a fuel outlet nozzle, and the fuel outlet nozzle is connected with the carburetor as described above through a fuel pipe 3.

The specific implementation process is as follows: taking the oil in the oil tank as 100% of the rated volume of the oil tank as an example. In the use process, when the carburetor is in forward tilting, as shown in fig. 3, the carburetor is in forward tilting by 90 degrees, and fuel enters the fuel pipe 3 at this time, but because the fuel liquid level 4 in the fuel pipe 3 does not exceed the highest point of the fuel pipe 3 at this time, the fuel in the fuel pipe 3 cannot flow to the main metering orifice 2 through the fuel pipe 3, so that the situation that the fuel leakage of the carburetor occurs is avoided.

When the carburetor tilts backward, leftward and rightward by 90 degrees, as shown in fig. 4, 5 and 6, the fuel enters the oil pipe 3, but the liquid level 4 of the fuel cannot reach the highest position of the oil pipe 3, so that the fuel in the oil pipe 3 cannot flow to the main metering orifice 2 through the oil pipe 3, and the condition that the fuel leaks in the carburetor is avoided.

Example 2

The difference from example 1 is that the fuel tank is taken as an example in which the fuel amount in the fuel tank does not exceed 50% of the rated volume of the fuel tank. As shown in fig. 8, in this embodiment, a float 5 is provided in an oil cup 1, and the oil cup 1 includes an upper portion above the water level where the bottom surface of the float 5 is located and a lower portion below the water level, and the upper volume of the oil cup 1 is larger than the lower volume. Therefore, after the carburetor is toppled over, the space below the carburetor is increased in the plane state, so that the liquid level 4 of the fuel cannot exceed the main metering orifice 2 after the carburetor is toppled over, and the situation that the fuel leakage of the carburetor occurs is avoided.

The foregoing is merely an embodiment of the present utility model, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application day or before the priority date of the present utility model, and can know all the prior art in the field, and have the capability of applying the conventional experimental means before the date, so that a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. The utility model provides a carburetor for non-road engine, includes oil cup and main measuring hole, the oil cup is located the lower part of carburetor, main measuring hole is located the inside of carburetor, its characterized in that: and the fuel storage part is used for storing part of fuel which is higher than the main measuring hole when the carburetor is toppled towards any direction.

2. The carburetor for an off-road engine according to claim 1, wherein: the oil storage part comprises an oil pipe communicated with the main measuring hole, and an oil inlet of the oil pipe is not higher than the main measuring hole.

3. The carburetor for an off-road engine according to claim 2, wherein: the oil pipe is arranged along the inner wall of the oil cup in a winding way.

4. A carburetor for an off-road engine according to claim 3, wherein: after the oil pipe winding is arranged, an included angle between a connecting line of the oil inlet end face and the main measuring hole and an axial center line of the main measuring hole is larger than 0 degrees.

5. The carburetor for an off-road engine according to claim 1, wherein: the oil cup is internally provided with a floater, the oil cup comprises an upper part above the horizontal plane where the bottom surface of the floater is located and a lower part below the horizontal plane, and the upper volume of the oil cup is larger than the lower volume.

6. The utility model provides a fuel feeding device for non-road engine, includes the oil tank, the oil tank bottom is equipped with out glib talker, its characterized in that: the carburetor of any one of claims 1-5 is connected to the oil outlet through an oil pipe.