CN221120141U

CN221120141U - Carburetor for gasoline engine

Info

Publication number: CN221120141U
Application number: CN202323323249.XU
Authority: CN
Inventors: 李志贤; 张仁品
Original assignee: Fuding Dingli Motorcycle Parts Co ltd
Current assignee: Fuding Dingli Motorcycle Parts Co ltd
Priority date: 2023-12-06
Filing date: 2023-12-06
Publication date: 2024-06-11
Anticipated expiration: 2033-12-06

Abstract

The utility model discloses a carburetor for a gasoline engine, which relates to the field of carburetors and comprises a carburetor main body, wherein a throttle valve is arranged in the carburetor main body, and the carburetor main body respectively supplies pure gasoline and engine oil of the gasoline engine as fuel. The quantitative hole and the transition hole are arranged on two sides of the throttle valve, when the engine is in a low-speed running state, the opening degree of the throttle valve is smaller, engine oil in the transition hole cannot enter the inner cavity of the carburetor main body at the moment, and sufficient engine oil supply can be provided in an idling stage only by providing the engine oil through the quantitative hole; when the engine enters a high-speed stage, the opening degree of the throttle valve is increased, so that the transition hole is communicated with the inner cavity of the carburetor main body, and at the moment, the quantitative hole and the transition hole simultaneously supply engine oil into the carburetor main body, so that sufficient engine oil supply is ensured, the proportioning balance of the engine oil and the gasoline is ensured, and the supply requirement of the engine from idle speed transition to full-power operation is met.

Description

Carburetor for gasoline engine

Technical Field

The utility model belongs to the field of carburetors, and particularly relates to a carburetor for a gasoline engine.

Background

The garden-type small gasoline internal combustion engines used in the market today are mostly two-stroke, however, the two-stroke engines use the following fuels: a certain amount of engine oil must be added to the gasoline, and after mixing the gasoline and engine oil, the mixture is added to the internal combustion engine, for example, the engine oil is usually added in a ratio of 25 to 1. A modified two-stroke engine (or nominally a four-stroke engine) is now on the market.

The prior modified two-stroke engine only supplies one mixed and good fuel (such as mixed 25 to 1 gasoline) by changing the past carburetor, and the air, the gasoline and the engine oil are fully mixed in the carburetor and then enter the internal combustion engine by simultaneously and respectively adding the engine oil and the gasoline into the carburetor.

When the engine runs, an idle stage (namely a low-speed working condition) and a high-speed stage with low rotation speed exist, the cylinder pressure in the idle stage is greatly different from the cylinder pressure in the high-speed stage, the opening degree of a throttle valve is smaller, the required fuel oil supply amount is smaller, the engine oil requirement amount is smaller, when the engine enters the high-speed stage, the original engine oil supply amount is unchanged along with the fact that the gasoline enters the inner cavity of the carburetor in a large amount, the condition of insufficient engine oil supply occurs, the proportion of engine oil and the gasoline is unbalanced, and therefore the internal lubrication of the gasoline engine is insufficient and the power output is insufficient.

Disclosure of utility model

In order to solve the above problems in the prior art, an object of the present utility model is to provide a carburetor for a gasoline engine.

The technical scheme adopted by the utility model is as follows:

A carburetor for a gasoline engine comprises a carburetor main body, wherein a throttle valve is arranged in the carburetor main body, an oil inlet is formed in the carburetor main body, and the oil inlet is connected with an oil inlet pipe; a quantitative hole and a transition hole are also formed in the carburetor main body; the transition hole and the quantitative hole are arranged in parallel, the quantitative hole is communicated with the oil inlet hole, and the quantitative hole and the transition hole are respectively arranged at two sides of the throttle valve; a second auxiliary hole is also formed in the carburetor body, and the second auxiliary hole is used for communicating the quantitative hole with the transition hole.

Optionally, an adjusting nail is arranged in the quantitative hole and used for adjusting the circulation gap in the quantitative hole.

Optionally, a first auxiliary hole is further formed in the carburetor body, and the quantitative hole and the oil inlet hole are communicated through the first auxiliary hole.

Alternatively, the end of the first auxiliary bore remote from the transition bore is sealed by a first blocking element.

Alternatively, the end of the transition bore remote from the carburetor body cavity is sealed by a second closure member.

Optionally, the end of the second auxiliary bore remote from the metering bore is sealed by a third blocking element.

The beneficial effects of the utility model are as follows:

The utility model provides a carburetor for a gasoline engine, which comprises a carburetor main body, wherein a throttle valve is arranged in the carburetor main body, an oil inlet is formed in the carburetor main body, and the oil inlet is connected with an oil inlet pipe; a quantitative hole and a transition hole are also formed in the carburetor main body; the transition hole and the quantitative hole are arranged in parallel, the quantitative hole is communicated with the oil inlet hole, and the quantitative hole and the transition hole are respectively arranged at two sides of the throttle valve; a second auxiliary hole is also formed in the carburetor body, and the second auxiliary hole is used for communicating the quantitative hole with the transition hole. Through arranging the metering hole and the transition hole at two sides of the throttle valve, when the engine is in a low-speed running state, the opening degree of the throttle valve is smaller, and engine oil in the transition hole cannot enter the inner cavity of the carburetor main body at the moment, and sufficient engine oil supply can be provided in an idling stage only by providing the engine oil through the metering hole; when the engine enters a high-speed stage, the opening degree of the throttle valve is increased, so that the transition hole is communicated with the inner cavity of the carburetor main body, and at the moment, the engine oil is simultaneously supplied to the carburetor main body through the quantitative hole and the transition hole, so that the sufficient engine oil supply is ensured, the proportioning balance of the engine oil and the gasoline is ensured, and the supply requirement of the engine from transition to full-power operation is met.

Drawings

Fig. 1 is a schematic front view of the present utility model.

Fig. 2 is a schematic left-hand view of the present utility model.

Fig. 3 is a schematic bottom view of the present utility model.

FIG. 4 is a schematic diagram of the hole site distribution of the carburetor body.

Fig. 5 is a schematic cross-sectional view of A-A in fig. 1.

Fig. 6 is an enlarged schematic view of region B in fig. 5.

FIG. 7 is a schematic cross-sectional view of C-C in FIG. 3.

Fig. 8 is an enlarged schematic view of the region S in fig. 7.

In the figure: 1-carburetor body, 2-first auxiliary hole, 3-oil inlet hole, 31-oil inlet pipe, 4-quantitative hole, 41-adjusting screw, 5-transitional hole, 51-second blocking element, 6-second auxiliary hole, 61-third blocking element, 7-throttle valve.

Detailed Description

In the embodiment, as shown in fig. 1-8, a carburetor for a gasoline engine comprises a carburetor body 1, wherein a throttle valve 7 is arranged in the carburetor body 1, an oil inlet hole 3 is formed in the carburetor body 1, and the oil inlet hole 3 is connected with an oil inlet pipe 31; a quantitative hole 4 and a transition hole 5 are also formed in the carburetor main body 1; the transition hole 5 and the quantitative hole 4 are arranged in parallel, the quantitative hole 4 is communicated with the oil inlet hole 3, and the oil inlet pipe 31 is used for conveying engine oil into the quantitative hole 4. The quantitative hole 4 and the transition hole 3 are respectively arranged at two sides of the throttle valve 7; the carburetor body 1 is also provided with a second auxiliary hole 6, and the second auxiliary hole 6 communicates the quantitative hole 4 with the transition hole 5. By arranging the quantitative hole 4 and the transition hole 5 at two sides of the throttle valve 7, when the engine is in a low-speed running state, the opening degree of the throttle valve 7 is smaller, and at the moment, the engine oil in the transition hole 5 is blocked by the throttle valve 7 and cannot enter the inner cavity of the carburetor main body 1, and sufficient engine oil supply can be provided in an idling stage only by providing the engine oil through the quantitative hole 4; when the engine enters a high-speed stage, the opening degree of the throttle valve 7 is increased, so that the transition hole 5 is communicated with the inner cavity of the carburetor main body 1, and at the moment, the quantitative hole 4 and the transition hole 5 simultaneously supply engine oil into the carburetor main body 1, so that sufficient engine oil supply is ensured, the proportioning balance of the engine oil and the gasoline is ensured, and the supply requirement of the engine from transition to full-power operation is met.

In this embodiment, as shown in fig. 5 to 8, an adjusting nail 41 is disposed in the dosing hole 4, the adjusting nail 41 is used for adjusting a circulation gap in the dosing hole 4, one end of the dosing hole 4 and one end of the adjusting bolt 41, which is close to the throttle valve 7, are tapered, the adjusting bolt 41 moves towards the throttle valve 7, the adjusting bolt 41 shields a flow passage of the dosing hole 41 into an inner cavity of the carburetor body 1, so that the flow rate of entering engine oil is adjusted, the flow rate of the dosing hole 41 can be set according to the power of an engine when leaving a factory, after setting, one end, far away from the inner cavity of the carburetor body 1, of the dosing hole 4 can be blocked by using a sealing piece such as a blocking piece, and in use, the adjusting bolt 41 cannot be adjusted.

In this embodiment, the carburetor main body 1 is further provided with a first auxiliary hole 2, and the quantitative hole 4 and the oil inlet 3 are communicated through the first auxiliary hole 2; one end of the first auxiliary hole 2, which is far away from the inner cavity of the carburetor body 1, is sealed by a first plugging element 21; the end of the second auxiliary bore 6 remote from the internal cavity of the carburetor body 1 is sealed by a third blocking element 61; the end of the transition bore 5 remote from the interior of the carburetor body 1 is sealed by a second closure member 51. When the first auxiliary hole 2, the second auxiliary hole 6 and the transition hole 5 are formed in the carburetor body 1, the drilling device can only drill holes inwards from the outer side wall of the carburetor body 1, so that one ends of the first auxiliary hole 2, the second auxiliary hole 6 and the transition hole 5 are communicated with the outside, and in order to ensure that engine oil cannot overflow during engine oil supply and in order to prevent air from being strung into the first auxiliary hole 2, the second auxiliary hole 6 and the transition hole 5, the first auxiliary hole 2, the second auxiliary hole 6 and the transition hole 5 are isolated from the outside.

Specifically, steel balls are used for the first blocking element 21, the second blocking element 51 and the third blocking element 61.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. The carburetor for the gasoline engine comprises a carburetor main body (1), wherein a throttle valve (7) is arranged in the carburetor main body (1), an oil inlet hole (3) is formed in the carburetor main body (1), and the oil inlet hole (3) is connected with an oil inlet pipe (31); the method is characterized in that:

a quantitative hole (4) and a transition hole (5) are also formed in the carburetor main body (1); the transition hole (5) and the quantitative hole (4) are arranged in parallel, the quantitative hole (4) is communicated with the oil inlet hole (3), and the quantitative hole (4) and the transition hole (5) are respectively arranged at two sides of the throttle valve (7);

A second auxiliary hole (6) is further formed in the carburetor main body (1), and the second auxiliary hole (6) is used for communicating the quantitative hole (4) with the transition hole (5).

2. A carburettor for petrol engines according to claim 1, characterised in that the dosing aperture (4) is provided with an adjusting peg (41), the adjusting peg (41) being arranged to adjust the flow gap in the dosing aperture (4).

3. The carburetor for the gasoline engine according to claim 1, wherein the carburetor body (1) is further provided with a first auxiliary hole (2), and the metering hole (4) and the oil inlet hole (3) are communicated through the first auxiliary hole (2).

4. A carburettor for petrol engines according to claim 3 wherein the end of the first auxiliary bore (2) remote from the metering bore (4) is sealed by a first closure element (21).

5. A carburettor for petrol engines according to claim 1 wherein the end of the second auxiliary bore (6) remote from the transition bore (5) is sealed by a third sealing element (61).

6. A carburettor for petrol engines according to claim 1 wherein the end of the transition bore (5) remote from the internal cavity of the carburettor body (1) is sealed by a second closure element (51).