Multi-fuel double-cavity supply system

Abstract

The utility model provides a multi-fuel double-cavity supply system which is used for an engine and comprises a body and two cavities arranged in the body, a throttle valve is arranged in each cavity, the body is provided with two fuel oil channels and two fuel gas channels, each cavity is correspondingly communicated with one fuel oil channel and one fuel gas channel, a gas inlet upper cover is arranged at the upper end of the body, and a gas outlet upper cover is arranged at the lower end of the body. A gas inlet pipe is arranged on one side of the middle of the gas inlet upper cover and communicated with the two gas channels in a Y shape. Each fuel gas channel comprises a fuel gas main channel and a fuel gas idling channel; the body is provided with an oil inlet elbow which is communicated with the two fuel oil channels; each fuel oil channel comprises a fuel oil main channel and a fuel oil idling channel. The Y-shaped gas inlet pipe and the Y-shaped oil inlet bent pipe are arranged on the body with the double cavities, switching of fuel gas and fuel oil can be achieved through one supply system, convenience is improved, the running requirements for the fuel gas and the fuel oil during idling of an engine are met through the gas supplementing hole and the transition hole, and stability of the engine is improved.

Description

Technical Field

[0001] The utility model relates to a supply system, in particular to a multi-fuel supply system. Background Art

[0002] A multi-fuel engine is a new type of engine that can use gasoline fuel and liquefied petroleum gas fuel or natural gas as fuel. It has the technical characteristics of high efficiency and low pollution emissions and has good development prospects. In the existing technology, some of this type of engine require multiple supply systems to switch between fuel and gas, which causes inconvenience. In addition, the existing dual-chamber supply system has inconsistent throttle openings, small openings or complete closures when the engine is idling, resulting in insufficient fuel or gas entering the engine, affecting the stability of the engine. Utility Model Content

[0003] In view of the deficiencies in the prior art, the present invention provides a multi-fuel dual-chamber supply system, which solves the inconvenience problem caused by the need for multiple supply systems to switch between fuel oil and gas in the prior art dual-fuel engines.

[0004] To achieve the above-mentioned purpose, the present invention provides a multi-fuel dual-chamber supply system for an engine, comprising a body and two chambers arranged in the body, each of the chambers being provided with a throttle valve, the body being provided with two fuel channels and two gas channels, each of the chambers correspondingly connected to one fuel channel and one gas channel, an air intake cover being provided at the upper end of the body, an air intake pipe being provided at one side of the middle of the air intake cover, the air intake pipe being Y-shaped and connecting the two gas channels; each of the gas channels comprising a main gas channel and a gas idle channel, wherein: one end of the main gas channel is connected to The other end of the intake pipe is connected to the intake end of the corresponding throttle valve; one end of the gas idle channel is connected to the gas main channel, and the other end is connected to the outlet end of the corresponding throttle valve through multiple air supply holes; the body is provided with an oil inlet elbow, both of which are connected to the two fuel channels; each fuel channel includes a fuel main channel and a fuel idle channel, wherein: one end of the fuel main channel is connected to the oil inlet elbow, and the other end is connected to the intake end of the corresponding throttle valve; one end of the fuel idle channel is connected to the fuel main channel, and the other end is connected to the outlet end of the corresponding throttle valve through multiple transition holes.

[0005] The throttle is mounted on a throttle shaft component, which is fixed to the body. A cable connector is provided on the throttle shaft component, which is connected to a pull rod of the engine, and the opening of the throttle is controlled by the pull rod of the engine.

[0006] Each of the chambers is provided with a choke valve on a side different from the throttle valve.

[0007] The choke is mounted on a choke shaft component, which is fixed to the body. A connecting hole is provided on the choke shaft component, which is connected to another pull rod of the engine, and the opening of the choke is controlled by the other pull rod of the engine.

[0008] The main gas channel includes a gas metering hole and a gas nozzle, wherein: one end of the gas metering hole is connected to the air inlet pipe, and the other end is connected to the gas nozzle; the other end of the gas nozzle is connected to the corresponding chamber.

[0009] The fuel channel also includes a float chamber and a solenoid valve; the float chamber is arranged at the bottom end of the body and is connected to the oil inlet elbow; the main fuel channel is provided with a main fuel metering hole, a foam tube and a fuel nozzle which are connected in sequence, wherein: the oil inlet end of the main fuel metering hole is connected to the float chamber; the foam tube is used for mixing fuel and air; the oil outlet end of the fuel nozzle is connected to the corresponding chamber; the solenoid valve is arranged between the float chamber and the main fuel metering hole; one end of the fuel idle channel bypasses between the main fuel metering hole and the foam tube, and the other end is provided with a fuel idle metering hole connected to the transition hole.

[0010] The main body is provided with an air inlet pipe, including a first air inlet pipe and a second air inlet pipe, wherein: the first air inlet pipe is connected to the foam pipe; the second air inlet pipe is connected to the fuel idle metering hole.

[0011] The first air inlet pipe is provided with a first air metering hole, and the second air inlet pipe is provided with a second air metering hole.

[0012] The first air inlet pipe is arranged below the second air inlet pipe, and the first air inlet pipe is arranged to be tilted downward, and the second air inlet pipe is arranged horizontally.

[0013] The air intake upper cover is a butterfly-shaped structure.

[0014] From the above scheme, it can be seen that the advantages of the present invention are:

[0015] (1) A Y-shaped air intake pipe and an oil intake elbow are provided on the main body with a double cavity, and the switching between gas and fuel can be realized by using a single supply system, thereby improving convenience. In addition, the air supply hole of the gas channel and the transition hole of the fuel channel can meet the operating requirements of the engine for gas and fuel when idling, thereby improving the stability of the engine.

[0016] (2) Directly use the engine to control the opening of the throttle and choke to save resources.

[0017] (3) The fuel and air are mixed by a foam tube and then supplied to the engine, which can effectively atomize the fuel and mix it with the air, thereby improving combustion efficiency.

[0018] (4) The air intake cover is designed as a butterfly-shaped structure, which not only adds an artistic feel but also improves the stability and strength of the air intake cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional diagram of the multi-fuel dual-chamber supply system of the present utility model;

[0020] Figure 2 for Figure 1 Rear view;

[0021] Figure 3 for Figure 1 Right view;

[0022] Figure 4 for Figure 1 A top view of

[0023] Figure 5 for Figure 4 AA section view in;

[0024] Figure 6 for Figure 3 FF cross-section diagram in;

[0025] Figure 7 for Figure 4 BB cross-section in;

[0026] Figure 8 for Figure 4 CC cross-section in;

[0027] Figure 9 for Figure 2 DD profile in;

[0028] Figure 10 for Figure 2 EE cross-section diagram in;

[0029] Figure 11 is a perspective view of a throttle shaft component;

[0030] Figure 12 It is a three-dimensional view of the choke shaft components;

[0031] Figure 13 It is a three-dimensional picture of the air intake cover;

[0032] Wherein, the reference numerals:

[0033] 1-Multi-fuel dual-chamber supply system;

[0034] 10-Ontology;

[0035] 11-L chamber;

[0036] 12-R chamber;

[0037] 13-air intake cover;

[0038] 14-intake pipe;

[0039] 15-L cavity gas channel;

[0040] 16-R cavity gas channel;

[0041] 17-Oil inlet elbow;

[0042] 18-L cavity fuel passage;

[0043] 19-R cavity fuel channel;

[0044] 20- float chamber;

[0045] 21- solenoid valve;

[0046] 22-throttle shaft component;

[0047] 23-choke;

[0048] 24-choke shaft component;

[0049] 25-Air inlet pipe. DETAILED DESCRIPTION

[0050] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the present invention, but it is not intended to limit the scope of protection of the claims attached to the present invention.

[0051] References in the specification to "an embodiment," "another embodiment," "this embodiment," etc., indicate that the described embodiment may include specific features, structures, or characteristics, but not every embodiment must include these specific features, structures, or characteristics. Furthermore, such references do not necessarily refer to the same embodiment. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, whether or not explicitly described, it is understood that incorporating such features, structures, or characteristics into other embodiments is within the knowledge of those skilled in the art.

[0052] Certain words are used in the specification and subsequent claims to refer to specific components or parts. It should be understood by those skilled in the art that technical users or manufacturers may refer to the same component or part with different nouns or terms. This specification and claims do not distinguish components or parts based on differences in name, but rather on differences in the functions of the components or parts. The words "include" and "comprising" mentioned throughout the specification and claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connect" herein includes any direct and indirect electrical connection means. Indirect electrical connection means include connection through other devices.

[0053] It should be noted that, in the description of the present invention, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships or parameters, etc., are all based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description content, and do not indicate or imply that the device or element referred to must have a specific direction, specific size, or be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0054] like Figures 1 to 13 As shown, the present invention provides a multi-fuel dual-chamber supply system 1 for a multi-fuel engine. The system 1 includes a body 10 and an L chamber 11 and an R chamber 12 arranged in the body 10. An L chamber throttle 110 is arranged in the L chamber 11, and an R chamber throttle 120 is arranged in the R chamber.

[0055] In this embodiment, two fuel channels and two gas channels are provided within the body 10, one fuel channel and one gas channel correspondingly connected to each chamber. Specifically, an L-chamber fuel channel 13, an R-chamber fuel channel 14, an L-chamber gas channel 15, and an R-chamber gas channel 16 are provided within the body 10. L-chamber fuel channel 13 and L-chamber gas channel 15 connect to L-chamber 11, while R-chamber fuel channel 14 and R-chamber gas channel 16 connect to R-chamber 12.

[0056] In this embodiment, an air inlet cover 13 is disposed at the top of the main body 10. An air inlet pipe 14 is disposed in the middle of the cover 13. The air inlet pipe 14 is Y-shaped and connects the two gas channels. Specifically, the air inlet pipe 14 has two outlet ends: a first outlet end 140 and a second outlet end 141. The first outlet end 140 connects to the L-chamber gas channel, while the second outlet end 141 connects to the R-chamber gas channel.

[0057] In this embodiment, each gas channel includes a main gas channel and an idle gas channel, wherein: one end of the main gas channel is connected to the intake pipe, and the other end is connected to the intake end of the corresponding throttle valve; one end of the idle gas channel is connected to the main gas channel, and the other end is connected to the outlet end of the corresponding throttle valve through multiple air supply holes.

[0058] Specifically, the L-cavity gas channel 15 includes an L-cavity gas main channel 150 and an L-cavity gas idle channel 151. The L-cavity gas main channel 150 includes an L-cavity gas metering hole 1500 and an L-cavity gas nozzle 1501 connected in sequence. The L-cavity gas metering hole 1500 controls the amount of gas entering the L-cavity gas main channel 150 and passes the gas into the L-cavity chamber 11 through the L-cavity gas nozzle 1501; one end of the L-cavity gas idle channel 151 is connected to the L-cavity gas main channel 150 (not shown), and the other end is connected to the outlet end of the L-cavity throttle 110 (not shown) through the L-cavity gas supply hole 152, which is used to provide sufficient gas to the engine in the idle state. Engine; The R cavity gas channel 16 includes an R cavity gas main channel 160 and an R cavity gas idle channel 161. The R cavity gas main channel 160 includes an R cavity gas metering hole 1600 and an R cavity gas nozzle 1601 connected in sequence. The R cavity gas metering hole 1600 controls the amount of gas entering the R cavity gas main channel 160 and passes the gas into the R cavity 12 through the R cavity gas nozzle 1601; one end of the R cavity gas idle channel 161 is connected to the R cavity gas main channel 160 (not shown), and the other end is connected to the outlet end of the R cavity throttle 120 (not shown) through the R cavity gas supply hole 162, which is used to provide sufficient gas to the engine in the idle state.

[0059] In this embodiment, an oil inlet elbow 17 is provided at the upper end of the body 10, both of which are connected to the two fuel channels. Specifically, an L-cavity fuel channel 18 and an R-cavity fuel channel 19 are provided in the body 10, wherein: one end of the L-cavity fuel channel 18 is connected to the oil inlet elbow 17, and the other end is connected to the L-cavity 11; one end of the R-cavity fuel channel 19 is connected to the oil inlet elbow 17 and the other end is connected to the R-cavity 12.

[0060] Each fuel channel includes a main fuel channel and an idle fuel channel, wherein: one end of the main fuel channel is connected to the fuel inlet elbow 17, and the other end is connected to the intake end of the corresponding throttle valve; one end of the idle fuel channel is connected to the main fuel channel, and the other end is connected to the outlet end of the corresponding throttle valve through multiple transition holes.

[0061] In this embodiment, the fuel channel also includes a float chamber 20 and a solenoid valve 21; the float chamber 20 is arranged at the bottom end of the main body 10 and is connected to the oil inlet elbow 17; the main fuel channel is provided with a main fuel metering hole, a foam tube and a fuel nozzle which are connected in sequence, wherein: the oil inlet end of the main fuel metering hole is connected to the float chamber 20; the foam tube is used for mixing fuel and air; the oil outlet end of the fuel nozzle is connected to the corresponding chamber; the solenoid valve 21 is arranged between the float chamber 20 and the main fuel metering hole; one end of the fuel idle channel bypasses between the main fuel metering hole and the foam tube, and the other end is provided with a fuel idle metering hole connected to the transition hole.

[0062] Specifically, the L-cavity fuel channel 18 includes an L-cavity fuel main channel 180 and an L-cavity fuel idle channel 181, wherein: the L-cavity fuel main channel 180 is provided with an L-cavity fuel main metering hole 1800, an L-cavity foam tube 1801 and an L-cavity fuel nozzle 1802 which are connected in sequence, the oil inlet end of the L-cavity fuel main metering hole 1800 is connected to the float chamber 20 through the solenoid valve 21, and the oil outlet end is connected to the L-cavity foam tube 1801, the L-cavity foam tube 1801 is used for mixing fuel and air, and the oil outlet end of the L-cavity fuel nozzle 1802 is connected to the L-cavity chamber 11; one end of the L-cavity fuel idle channel 181 bypasses between the L-cavity fuel main metering hole 1800 and the L-cavity foam tube 1801, and the other end is provided with an L-cavity fuel idle metering hole 1810 which is connected to multiple L-cavity transition holes 182, and the L-cavity transition hole 182 is connected to the air outlet end of the L-cavity throttle 110 (not shown in the figure).

[0063] The R cavity fuel channel 19 includes an R cavity fuel main channel 190 and an R cavity fuel idle channel 191. The R cavity fuel main channel 190 is provided with an R cavity fuel main metering hole 1900, an R cavity foam tube 1901 and an R cavity fuel nozzle 1902 which are connected in sequence. The oil inlet end of the R cavity fuel main metering hole 1900 is connected to the float chamber 20 through the solenoid valve 21, and the oil outlet end is connected to the R cavity foam tube 1901. The R cavity foam tube 1901 is used for mixing fuel and air. The oil inlet end of the R cavity fuel nozzle 1822 is connected to the R cavity foam tube 1901, and the oil outlet end is connected to the R cavity 12. One end of the R cavity fuel idle channel 191 bypasses between the R cavity fuel main metering hole 1900 and the R cavity foam tube 1901, and the other end is provided with an R cavity fuel idle metering hole 1910 which is connected to multiple R cavity transition holes 192. The R cavity transition hole 192 is connected to the air outlet end of the R cavity throttle 120 (not shown in the figure).

[0064] In this embodiment, two throttle valves (including the L-chamber throttle valve 11 and the R-chamber throttle valve 12) are installed on the throttle shaft component 22, and the throttle shaft component 22 is fixed on the main body 10. A pull wire joint 220 is provided on the throttle shaft component 22, and the pull wire joint 220 is connected to the engine's pull rod (not shown in the figure), and the opening of the two throttle valves is controlled by the engine's pull rod.

[0065] In this embodiment, each chamber is provided with a choke 23 on a side different from the throttle. Specifically, the choke 23 includes an L-chamber choke 230 and an R-chamber choke 231. The L-chamber choke 230 and the R-chamber choke 231 are mounted on a choke shaft 24, which is fixed to the body 10. The choke shaft 24 is provided with a connecting hole 240. The connecting hole 240 is connected to another tie rod (not shown) of the engine, and the opening of the L-chamber choke 230 and the R-chamber choke 231 is controlled by the other tie rod of the engine.

[0066] In this embodiment, the main body 10 is provided with an air inlet pipe 25. The air inlet pipe 25 includes a first air inlet pipe 251 and a second air inlet pipe 252. The first air inlet pipe 251 is connected to the foam tubes (i.e., the L-chamber foam tube 1801 and the R-chamber foam tube 1901); the second air inlet pipe 252 is connected to the fuel idle metering holes (i.e., the L-chamber fuel idle metering hole 1810 and the R-chamber fuel idle metering hole 1910). The first air inlet pipe 251 is provided with a first air metering hole 2510, while the second air inlet pipe 252 is provided with a second air metering hole 2520. The first air metering hole 2510 controls the amount of air entering the first air inlet pipe 251, while the second air metering hole 2520 controls the amount of air entering the second air inlet pipe 252.

[0067] In this embodiment, the first air inlet pipe 251 is disposed below the second air inlet pipe 252 , and the first air inlet pipe 251 is disposed downwardly inclined, while the second air inlet pipe 252 is disposed horizontally.

[0068] Specifically, if Figure 2 and Figure 8 As shown, the first air inlet pipe 251 includes an L-cavity first air inlet pipe 2511 and an R-cavity first air inlet pipe 2512. The L-cavity first air inlet pipe 2511 is disposed at the lower end of the L-cavity choke 240, and the R-cavity first air inlet pipe 2512 is disposed at the lower end of the R-cavity choke 241. The second air inlet pipe 252 includes an L-cavity second air inlet pipe 2521 and an R-cavity second air inlet pipe 2522. The L-cavity second air inlet pipe 2521 is disposed obliquely above the L-cavity choke 240, and the R-cavity second air inlet pipe 2522 is disposed obliquely above the R-cavity choke 241. The L-cavity first air inlet pipe 2511 is directly below the L-cavity second air inlet pipe 2521, and the R-cavity first air inlet pipe 2512 is directly below the R-cavity second air inlet pipe 2522.

[0069] The following description will be made by taking the introduction of fuel oil and gas into the R chamber 12 as an example. The introduction of fuel oil and gas into the L chamber 11 is similar in principle to that of the R chamber 12 and will not be described in detail here.

[0070] When using fuel, Figure 5 、 Figures 7 to 9As shown, the fuel is connected to the oil inlet elbow 17, the fuel flows into the float chamber 20, the rear solenoid valve 21 is connected to the battery to shrink the solenoid valve needle 210, and the fuel flows into the R cavity fuel main channel 190, passes through the R cavity fuel main metering hole 1900, and is mixed with the air in the R cavity foam tube 1901 and the R cavity first air inlet pipe 2512 to generate a mixed gas, which is sprayed into the R cavity 12 in the R cavity throttle valve 120 at the intake end by the R cavity fuel nozzle 1902, and is sucked into the engine for combustion after the opening of the R cavity throttle valve 120 is controlled by the throttle shaft component 22; or flows into the R cavity fuel idle channel 191 through the R cavity fuel idle metering hole 1910, and is mixed with the air in the R cavity second air inlet pipe 2522 to generate a mixed gas, which is sprayed into the R cavity throttle valve 120 at the outlet end by the R cavity transition hole 192, and is sucked into the engine for combustion.

[0071] When using gas, Figure 6 、 Figure 7 and Figure 10 As shown, according to the needs of the engine, LPG gas or NG gas is connected to the intake pipe 14 on the intake cover 13, and the gas enters the R cavity gas channel 16 through the second outlet end 141, and is sprayed into the intake end of the R cavity throttle 120 in the R cavity chamber 12 through the R cavity gas metering hole 1600 on the R cavity gas main channel 160 through the R cavity gas nozzle 1601, and then the opening of the R cavity throttle 120 is controlled by the throttle shaft component 22, and is sucked into the engine for combustion; or the gas in the R cavity gas main channel 160 is diverted and sprayed into the outlet end of the R cavity throttle 120 through the R cavity gas idle channel 161 and the R cavity air supply hole 162, and is then sucked into the engine for combustion.

[0072] To sum up, the utility model provides a Y-shaped air intake pipe and an oil inlet elbow on a main body with a dual cavity, and can realize the switching between gas and fuel by using one supply system, thereby improving convenience. Moreover, the air filling hole of the gas channel and the transition hole of the fuel channel can meet the operating requirements of the engine for gas and fuel when idling, thereby improving the stability of the engine. The throttle and choke openings are directly controlled by the engine, thereby saving resources. The fuel and air are mixed by a foam tube and then provided to the engine, which can effectively atomize the fuel and mix it with the air, thereby improving combustion efficiency. The air intake cover is designed as a butterfly-shaped structure, which improves the stability and strength of the air intake cover while adding an artistic sense.

[0073] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A multi-fuel dual-chamber supply system for an engine, comprising a main body and two chambers disposed within the main body, each chamber being provided with a throttle valve, the main body being provided with two fuel passages and two gas passages, each chamber correspondingly communicating with one fuel passage and one gas passage, characterized in that: An air intake cover is provided at the upper end of the main body, an air intake pipe is provided on one side of the middle of the air intake cover, and the air intake pipe is Y-shaped and connects the two gas channels; Each of the gas channels includes a main gas channel and an idle gas channel, wherein: one end of the main gas channel is connected to the intake pipe, and the other end is connected to the intake end of the corresponding throttle valve; one end of the idle gas channel is connected to the main gas channel, and the other end is connected to the outlet end of the corresponding throttle valve through a plurality of gas supply holes; The body is provided with an oil inlet elbow, both of which are connected to the two fuel channels; Each of the fuel channels includes a main fuel channel and an idle fuel channel, wherein: one end of the main fuel channel is connected to the fuel inlet elbow, and the other end is connected to the intake end of the corresponding throttle valve; one end of the idle fuel channel is connected to the main fuel channel, and the other end is connected to the outlet end of the corresponding throttle valve through multiple transition holes.

2. The dual-chamber supply system according to claim 1, characterized in that: The throttle is mounted on a throttle shaft component, which is fixed to the main body. A pull wire joint is provided on the throttle shaft component, which is connected to a pull rod of the engine, and the opening of the throttle is controlled by the pull rod of the engine.

3. The dual-chamber supply system according to claim 1 or 2, characterized in that: Each of the chambers is provided with a choke valve on a side different from the throttle valve.

4. The dual-chamber supply system according to claim 3, characterized in that: The choke is mounted on a choke shaft component, which is fixed to the body. A connecting hole is provided on the choke shaft component, which is connected to another pull rod of the engine, and the opening of the choke is controlled by the other pull rod of the engine.

5. The dual-chamber supply system according to claim 1, characterized in that: The main gas channel includes a gas metering hole and a gas nozzle, wherein: one end of the gas metering hole is connected to the air inlet pipe, and the other end is connected to the gas nozzle; the other end of the gas nozzle is connected to the corresponding chamber.

6. The dual-chamber supply system according to claim 1, characterized in that: The fuel channel further includes a float chamber and a solenoid valve; the float chamber is arranged at the bottom end of the body and connected to the oil inlet elbow; The main fuel channel is provided with a main fuel metering hole, a foam tube and a fuel nozzle which are connected in sequence, wherein: the oil inlet end of the main fuel metering hole is connected to the float chamber; the foam tube is used for mixing fuel and air; the oil outlet end of the fuel nozzle is connected to the corresponding chamber; The solenoid valve is arranged between the float chamber and the main fuel metering hole; One end of the fuel idle passage bypasses between the fuel main metering hole and the foam tube, and the other end is provided with a fuel idle metering hole communicated with the transition hole.

7. The dual-chamber supply system according to claim 6, characterized in that: The main body is provided with an air inlet pipe, including a first air inlet pipe and a second air inlet pipe, wherein: The first air inlet pipe is connected to the foam pipe; The second air inlet pipe is communicated with the fuel idle metering hole.

8. The dual-chamber supply system according to claim 7, characterized in that: The first air inlet pipe is provided with a first air metering hole, and the second air inlet pipe is provided with a second air metering hole.

9. The dual-chamber supply system according to claim 7, characterized in that: The first air inlet pipe is arranged below the second air inlet pipe, and the first air inlet pipe is arranged to be tilted downward, and the second air inlet pipe is arranged horizontally.

10. The dual-chamber supply system according to claim 1, characterized in that: The air intake upper cover is a butterfly-shaped structure.

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