High-power low-oil-consumption carburetor

Abstract

The utility model discloses a high-power low-oil-consumption carburetor, and belongs to the technical field of engine fuel supply. Through a double-throat-pipe integrated structure (a large throat pipe and a gradually-expanded small throat pipe), foam pipe oil spraying end positioning optimization and electromagnetic oil cut-off control, the small throat pipe works independently under the small load, and the atomization efficiency is improved; the large throat pipe supplies oil during large load; the solenoid valve accurately cuts off a fuel oil channel, and oil supply and gas supply switching is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine fuel supply systems, and specifically relates to a high-power, low-fuel-consumption carburetor suitable for high-power engines, and more particularly to a carburetor design that optimizes fuel atomization and mixing efficiency through a double-throat structure, thereby taking into account both power and economy. Background Art

[0002] The carburetor, the engine's heart, uses vacuum to mix and atomize gasoline and air in the correct proportions, making it a crucial component for stable engine operation. While traditional carburetors offer a full range of functions, including starting, idling, load, and acceleration, as engine power increases, the diameter of the carburetor's throat must be increased to meet the high intake air flow requirements. However, large carburetors present significant drawbacks under low-speed, low-load conditions: 1. Insufficient air velocity: At low rpm, the air velocity in the carburetor is too low, resulting in inadequate gasoline atomization, which leads to uneven mixture concentration, incomplete combustion, and fuel waste (poor economy). 2. Conflict between power and economy: While increasing the carburetor's diameter improves intake air volume under high load (power), it exacerbates atomization problems under low load, making it impossible to achieve a balance between these two requirements. 3. Insufficient cold-start and idle stability: Fuel continues to evaporate after the engine is stopped, making cold starts difficult. Furthermore, the mixture is difficult to control accurately at idle, making it prone to stalling or combustion fluctuations.

[0003] Therefore, there is an urgent need to design a high-power, low-fuel-consumption carburetor that can achieve dual-throat collaborative operation and precise control of atomization and mixing efficiency through structural optimization. Utility Model Content

[0004] In order to solve the above problems, the purpose of the present invention is to provide a high-power and low-fuel-consumption carburetor, which achieves the following through the staged operation of the dual throats (large throat + small throat), optimization of the fuel atomization structure and electromagnetic oil cut-off control: efficient atomization at low speed and light load (improving economy); coordinated power increase of the dual throats at high speed and heavy load (improving power); solving the problems of cold start and idling stability, and realizing dual use of oil and gas.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a high-power, low-fuel-consumption carburetor, comprising a carburetor body, wherein a large throat and a main oil passage are provided on the carburetor body; a foam tube and a main air volume seat are inserted into the main oil passage; a small throat is provided in the large throat; and the main technical features include the following:

[0006] • Small throat structure: The spray end of the foam pipe extends to the waist below the center axis of the small throat; the inner hole of the small throat is a gradually expanding inner hole with a narrow middle part and widened ends;

[0007] • Double throat coordination: the small throat and the inner wall of the large throat are integrated, and the outer diameter of the small throat is ≤ four-fifths of the radius of the large throat;

[0008] • Electromagnetic fuel cut-off control: A solenoid valve is installed below the float chamber; a valve seat is provided at the main oil passage entrance, with a center axis hole and side through holes on the valve seat; the solenoid valve needle can block the center axis hole to cut off the oil passage, causing the carburetor to switch to a different air supply state, thus preventing fuel from evaporating after the engine is shut down;

[0009] • Intake and fuel supply system: An intake pipe and an intake channel are set above the carburetor body. The intake pipe is connected to the intake channel. The outlet of the intake channel leads to the large throat pipe and is close to the throttle position. An oil inlet pipe is set on the side of the carburetor body, and the oil inlet pipe is used to connect the fuel pipe.

[0010] Further optimization plan:

[0011] 1. The depth of the opening of the small throat pipe facing the engine is greater than the depth of the other side (one-way gradual expansion structure);

[0012] 2. The foam tube is fixedly connected to the main air volume seat by a circlip or thread;

[0013] 3. The ratio of the diameter of the middle part of the gradually expanding inner hole of the small throat tube to the diameter of the two ends is 1:1.5~1:2. The beneficial effects of this utility model are:

[0014] 1. Dual-throat graded atomization: At low loads, only the small throat works, improving atomization efficiency and thus improving economy; at high loads, the dual throats work together to supply oil and enhance power.

[0015] 2. Electromagnetic fuel cut-off control: cuts off the fuel path when the engine is shut down to prevent the fuel from volatilizing or switch the air supply state;

[0016] 3. Optimized structural reliability: Integrated dual throats reduce airflow disturbances; small throat outer diameter ratio ensures airflow efficiency; and the unidirectional gradual expansion design shortens the mixing path.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of a specific embodiment of the present utility model;

[0019] Figure 2 A cross-sectional view of a specific embodiment of the present invention Figure 1 ;

[0020] Figure 3 A cross-sectional view of a specific embodiment of the present invention Figure 2 ;

[0021] Figure 4 A cross-sectional view of a specific embodiment of the present invention Figure 3 .

[0022] In the figure, 1-carburetor body; 2-large throat; 3-main oil channel; 4-foam tube; 5-main air volume seat; 6-small throat; 7-float chamber; 8-solenoid valve; 9-intake pipe; 10-intake channel; 11-oil inlet pipe; 12-valve seat; 13-center axis hole; 14-side through hole; 15-valve needle; 16-throttle valve; 17-gradually expanding inner hole; 18-open mouth; 19-other side. DETAILED DESCRIPTION

[0023] The present invention is described in detail below through examples, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0024] like Figure 1 — Figure 4 As shown, this embodiment discloses a high-power, low-fuel-consumption carburetor, comprising a carburetor body 1, on which a large throat pipe 2 and a main oil channel 3 are provided; a foam tube 4 and a main air volume seat 5 are inserted into the main oil channel 3; a small throat pipe 6 is provided in the large throat pipe 2; and the carburetor mainly comprises the following technical features:

[0025] • Small throat structure: The oil injection end of the foam tube 4 extends to the waist below the central axis of the small throat 6; the inner hole of the small throat 6 is a gradually expanding inner hole 17 that is narrow in the middle and widens at both ends;

[0026] • Double throat coordination: the small throat pipe 6 is integrated with the inner wall of the large throat pipe 2, and the outer diameter of the small throat pipe 6 is ≤ four-fifths of the radius of the large throat pipe 2;

[0027] • Electromagnetic oil shut-off control: A solenoid valve 8 is installed below the float chamber 7; a valve seat 12 is provided at the entrance of the main oil passage 3, with a center axis hole 13 and a side through hole 14 formed on the valve seat; the solenoid valve needle 15 can block the center axis hole 13 to cut off the oil circuit, causing the carburetor to switch to a gas supply state and prevent fuel volatilization after the engine is shut down;

[0028] • Air intake and fuel supply system: An air intake pipe 9 and an air intake channel 10 are arranged inside the carburetor body. The air intake pipe 9 is connected to the air intake channel 10. The outlet of the air intake channel leads to the large throat pipe and is close to the throttle position. An oil inlet pipe 11 is provided on the side of the carburetor body. The oil inlet pipe is used to connect the fuel pipe.

[0029] Further optimization plan:

[0030] 1. The depth of the opening 18 of the small throat 6 facing the engine is greater than the depth 19 on the other side (one-way gradual expansion structure);

[0031] 2. The foam tube 4 is fixedly connected to the main air volume seat 5 by a circlip or thread;

[0032] 3. The ratio of the middle diameter to the two end diameters of the gradually expanding inner hole 17 of the small throat is 1:1.5~1:2.

[0033] Core structure details:

[0034] 1. Double pipe system

[0035] Large throat 2 diameter Φ50~80mm;

[0036] The outer diameter of the small throat pipe 6 is ≤ three-fifths of the radius of the large throat pipe;

[0037] The gradually expanding inner hole 17 is Φ15mm in the middle and Φ22mm at both ends. The engine side open port 18 is 10mm deep and the other side 19 is 5mm deep.

[0038] 2. Fuel atomization system

[0039] The oil injection end of the foam tube 4 is located in the middle of the small throat pipe 6 (one-third of the distance from the inlet), and is offset 5 mm below the center axis.

[0040] 3. Electromagnetic oil cut-off system

[0041] When the engine is stopped, the valve needle 15 blocks the center shaft hole 13; when the engine is started, the valve needle returns to its original position, and the fuel enters the main oil channel through the side through hole 14.

[0042] The above technical solution is adopted: 1. Dual-throat graded atomization: at low load, only the small throat works, the atomization efficiency is improved and thus the economy is improved; at high load, the dual throats cooperate to supply oil to improve power.

[0043] 2. Electromagnetic fuel cut-off control: cuts off the fuel path when the engine is shut down to prevent the fuel from volatilizing or switch the air supply state;

[0044] 3. Optimized structural reliability: Integrated dual throats reduce airflow disturbances; small throat outer diameter ratio ensures airflow efficiency; and the unidirectional gradual expansion design shortens the mixing path.

[0045] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0046] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high-power, low-fuel-consumption carburetor, comprising a carburetor body (1), a foam tube (4), and a main air volume seat (5), wherein the carburetor body (1) is provided with a main oil passage (3), a large throat (2), and a small throat (6), and the main oil passage (3) is provided with a foam tube (4) and a main air volume seat (5), characterized in that: The small throat pipe (6) is arranged at the middle waist position of the inner cavity of the large throat pipe (2), and the oil injection end of the foam pipe (4) extends to the middle waist position below the central axis of the small throat pipe (6). The inner hole of the small throat pipe is a gradually expanding inner hole structure; the small throat pipe (6) is integrally arranged with the inner wall of the large throat pipe (2), and the outer diameter is less than the radius of the large throat pipe; a solenoid valve (8) is arranged below the float chamber (7), the valve seat (12) opens a central axis hole (13) and a side through hole (14), and the valve needle (15) can block the central axis hole; an intake pipe (9) is inserted above the carburetor body (1), and the intake pipe (9) is connected to the intake channel (10) in the carburetor body (1).

2. The high-power, low-fuel-consumption carburetor according to claim 1, characterized in that: The depth of the open port (18) on the engine side of the small throat (6) is greater than that of the other side (19).

3. The high-power, low-fuel-consumption carburetor according to claim 1, characterized in that: The ratio of the diameter of the middle portion to the diameter of the two ends of the gradually expanding inner hole (17) of the small throat tube is 1:1.5~1:2.

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