CN218563763U - Carburetor for general gasoline engine - Google Patents
Carburetor for general gasoline engine Download PDFInfo
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- CN218563763U CN218563763U CN202223247553.6U CN202223247553U CN218563763U CN 218563763 U CN218563763 U CN 218563763U CN 202223247553 U CN202223247553 U CN 202223247553U CN 218563763 U CN218563763 U CN 218563763U
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- carburetor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The utility model discloses a logical machine is with carburetor includes the carburetor body, sets up at this internal inlet channel of carburetor, air door, choke, mixed gas air door, nozzle, negative pressure hole, and the bottom is equipped with the oil duct groove, the oil feed return bend of side: a middle shell; a membrane; a pump membrane return spring; a diaphragm; a lower housing. The utility model discloses a modified oil, gas circuit structure adopt the negative pressure oil feed mode, can make the oil feed more reasonable according to the user demand of engine, and modified seal structure, reasonable oil feed mechanism improve better assurance for the high performance of engine, emission index and security. By adopting the vertically arranged negative pressure adjusting device, the elastic membrane is evenly immersed in oil in the oil cavity, so that oil supply is facilitated, and the service life of the part is greatly prolonged.
Description
Technical Field
The utility model relates to an oil supply unit field of carburetor, concretely relates to general gasoline engine carburetor.
Background
Along with the increasing safety requirements on the general gasoline engine, in the past, the carburetor with the float structure is basically used for supplying oil, the carburetor with the float structure cannot effectively deal with a plurality of severe working conditions, under the severe working conditions, the oil leakage phenomenon caused by rich oil easily occurs to the carburetor, the performance of the engine is influenced, and meanwhile, potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defects of the prior art, the present invention provides a carburetor for general-purpose engine, which can solve the problem of oil leakage caused by the rich oil easily existing in the existing carburetor with float structure.
The purpose of the utility model is realized through such technical scheme:
a carburetor for a general gasoline engine comprises a carburetor body, wherein a through air inlet channel is arranged at the upper part of the carburetor body, an air inlet air door for adjusting air inflow, a throat pipe for reducing the ventilation section and an air mixing air door for adjusting the air flow of a mixer are sequentially arranged along the air inlet channel, a main nozzle is arranged at the throat pipe and is communicated with the lower surface of the carburetor body through an oil outlet channel; the bottom of the carburetor is provided with an oil channel groove; an oil inlet bent pipe is arranged on the side face of the carburetor body, and the tail of the oil inlet bent pipe is communicated with the oil duct groove; a negative pressure hole is formed in the air inlet channel; further comprising:
the middle shell is arranged right below the carburetor body; the upper surface is provided with a first oil groove which is communicated with the oil duct groove; the upper surface is provided with an oil storage cavity which is communicated with the negative pressure hole and is also provided with a penetrating oil outlet hole which is communicated with the main nozzle; an oil inlet control switch system is arranged in the oil spraying cavity and used for controlling the oil spraying cavity to be communicated with the oil storage cavity;
the diaphragm is arranged between the middle shell and the lower surface of the carburetor body, and is provided with a movable valve for sealing the first oil groove and a perforation for communicating the oil outlet with the main nozzle;
the pump membrane return spring is arranged on the lower surface of the carburetor body and used for returning the movable valve to close the first oil groove;
the elastic membrane is arranged on the lower surface of the middle shell and seals the oil injection cavity on the lower surface of the middle shell;
the lower shell is arranged on the lower surface of the elastic membrane, and a penetrating flat pressing hole is formed in the lower shell and is opposite to the elastic membrane.
Furthermore, a first connecting channel is arranged on the middle shell, the head end of the first connecting channel is communicated with the oil storage cavity, and the tail end of the first connecting channel penetrates through the middle shell body, is communicated with the upper surface of the middle shell body and is opposite to the movable valve; the movable valve is attached to the upper surface of the middle shell to shield the tail end of the first connecting channel.
Furthermore, a second communicating channel is arranged on the middle shell, the head end of the second communicating channel is communicated with the first oil groove, and the tail end of the second communicating channel penetrates through the middle shell body, is communicated with the upper surface of the middle shell body and is opposite to the movable valve; the movable valve is attached to the upper surface of the middle shell to shield the tail end of the second communicating channel.
Furthermore, the number of the movable valves is two, and the first movable valve shields the first connecting channel and the tail end of the second connecting channel;
the middle shell is provided with a third communicating channel, the head end of the third communicating channel is communicated with the oil storage cavity, and the tail end of the third communicating channel penetrates through the middle shell body, is communicated with the upper surface of the middle shell body and is opposite to the second movable valve; the second movable valve is attached to the upper surface of the middle shell to shield the tail end of the third communicating channel.
Furthermore, a needle valve hole communicated with the oil injection cavity is formed in the upper surface of the middle shell;
the oil feed control switch system includes:
the needle valve seat is arranged in the needle valve hole;
the needle valve is arranged in the oil injection cavity and is connected with the needle valve seat;
one end of the rocker pin is connected with the valve needle;
the needle valve rocker is connected with the other end of the rocker pin;
and two ends of the needle valve spring are respectively abutted against the needle valve rocker arm and the inner wall of the oil injection cavity.
Furthermore, the carburetor body is also provided with a main metering orifice, the tail end of the carburetor body is communicated with the air inlet channel, and the head end of the carburetor body is communicated with the oil outlet hole; the carburetor body is further provided with an idling oil passage hole, the tail end of the carburetor body is communicated with the air inlet passage, and the head end of the carburetor body is communicated with the oil outlet hole.
Furthermore, the main metering orifice and the oil outlet channel are coaxially arranged, the lower part of the oil outlet channel is of an expanding structure, and the head end of the idle oil channel is arranged at the expanding structure of the oil channel; the upper end of the pump membrane return spring is arranged in the diameter expanding structure of the oil channel, and the diameter expanding structure of the oil channel limits the upper end of the pump membrane return spring.
Furthermore, the lower surface of the carburetor body is also provided with a gas storage cavity which is sealed by a membrane.
Further, the method also comprises the following steps:
the middle gasket is arranged between the middle shell and the carburetor body and plays a role in sealing.
And the lower gasket is arranged between the middle shell and the elastic membrane and plays a role in sealing.
Further, an air chamber is arranged on the upper surface of the lower shell, the air chamber is opposite to the elastic diaphragm, and the flat pressing hole communicates the inside of the air chamber with the outside atmosphere.
Since the technical scheme is used, the utility model discloses following advantage has:
1. adopt modified oil, gas circuit structure, adopt the negative pressure oil feed mode, can make the oil feed more reasonable according to the user demand of engine, modified seal structure, reasonable oil feed mechanism improves better assurance for high performance, the emission index and the security of engine.
2. By adopting the vertically arranged negative pressure adjusting device, the elastic membrane is evenly immersed in oil in the oil cavity, so that oil supply is facilitated, and the service life of the part is greatly prolonged.
3. The structure completely avoids the situation that the existing carburetor with a float structure is easy to have rich oil, thereby avoiding the oil leakage situation caused by rich oil.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The drawings of the utility model are explained as follows:
FIG. 1 is a first perspective view of a carburetor for a motorcycle according to the present embodiment.
Fig. 2 is a second perspective view of the carburetor for a motorcycle according to the present embodiment.
Fig. 3 is a schematic cross-sectional view of the carburetor for a motorcycle according to the present embodiment, the cross-sectional view being taken along the longitudinal direction of the intake passage.
Fig. 4 is a schematic diagram of a first angle explosion structure of the carburetor of the present embodiment.
Fig. 5 is a schematic perspective view of a middle housing of the carburetor for a general-purpose engine according to the present embodiment.
Fig. 6 is a schematic diagram of a second angular explosion structure of the carburetor of the present embodiment.
In the figure: 1. a carburetor body; 11. an air intake passage; 12. an air intake damper; 13. a roar pipe; 14. a mixed air door; 15. a main nozzle; 16. an oil channel groove; 17. an oil inlet bent pipe; 18. a main orifice; 19. an idle oil passage hole; 101. a gas storage cavity; 102. a negative pressure hole; 2. a middle shell; 21. a first oil groove; 22. an oil storage chamber; 23. an oil outlet hole; 24. an oil spraying cavity; 25. a first connecting channel; 26. a second communication channel; 27. a third communicating channel; 31. a needle valve seat; 32. a needle valve; 33. a rocker arm pin; 34. a needle valve rocker arm; 35. a needle valve spring; 4. a membrane; 41. a first movable valve; 42. a second movable valve; 5. a pump membrane return spring; 6. a diaphragm; 7. a lower housing; 71. a gas chamber; 72. flattening the hole; 8. a middle gasket; 9. and a lower gasket.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The embodiment is as follows:
as shown in fig. 1 to 6, the carburetor for general gasoline engine includes a carburetor body 1, an air intake passage 11 penetrating through the carburetor body 1 is provided at the upper part, an air intake damper 12 for adjusting the air intake amount, a throat pipe for reducing the ventilation cross section, and an air mixing damper for adjusting the air flow of the mixer are provided along the air intake passage 11 in sequence, a main nozzle 15 is provided at the throat pipe, and the main nozzle 15 is communicated with the lower surface of the carburetor body 1 through an oil outlet passage; the bottom of the carburetor is provided with an oil channel groove 16; an oil inlet bent pipe 17 is arranged on the side surface of the carburetor body 1, and the tail part of the oil inlet bent pipe 17 is communicated with an oil channel groove 16; a negative pressure hole 102 is arranged in the air inlet channel 11; further comprising:
a middle housing 2 disposed right below the carburetor body 1; the upper surface is provided with a first oil groove 21 which is communicated with the oil channel groove 16; the upper surface is provided with an oil storage cavity 22, the oil storage cavity 22 is communicated with the negative pressure hole 102, and is also provided with a penetrating oil outlet 23, and the oil outlet 23 is communicated with the main nozzle 15; an oil injection cavity 24 is formed in the lower surface of the middle shell 2, an oil inlet control switch system is arranged in the oil injection cavity 24, and the oil injection cavity 24 is controlled to be communicated with the oil storage cavity 22;
a diaphragm 4 provided between the middle housing 2 and the lower surface of the carburetor body 1, and provided with a movable valve for closing the first oil groove 21 and a through hole for communicating the oil outlet 23 with the main nozzle 15;
the pump membrane return spring 5 is arranged on the lower surface of the carburetor body 1 and used for returning the movable valve to close the first oil groove 21;
the elastic membrane 6 is arranged on the lower surface of the middle shell 2 and seals the oil injection cavity 24 on the lower surface of the middle shell;
the lower shell 7 is arranged on the lower surface of the elastic membrane 6, a penetrating flat pressing hole 72 is formed in the lower shell 7, and the flat pressing hole 72 is opposite to the elastic membrane 6.
In this embodiment, the middle shell 2 is provided with a first communicating channel 25, the head end of the first communicating channel is communicated with the oil storage chamber 22, and the tail end of the first communicating channel passes through the middle shell 2 body, is communicated with the upper surface of the middle shell 2 body and is opposite to the movable valve; the movable valve is attached to the upper surface of the middle shell 2 to shield the tail end of the first connecting channel 25.
The middle shell 2 is provided with a second communicating channel 26, the head end of the second communicating channel is communicated with the first oil groove 21, and the tail end of the second communicating channel penetrates through the middle shell 2 body, is communicated with the upper surface of the middle shell 2 body and is opposite to the movable valve; the movable valve is attached to the upper surface of the middle shell 2 to shield the tail end of the second communicating channel 26.
The number of the movable valves is two, and the first movable valve 41 covers the first communicating channel 25 and the tail end of the second communicating channel;
a third communicating channel 27 is arranged on the middle shell 2, the head end of the third communicating channel is communicated with the oil storage cavity 22, and the tail end of the third communicating channel penetrates through the body of the middle shell 2, is communicated with the upper surface of the body of the middle shell 2 and is opposite to the second movable valve 42; the second movable valve 42 is attached to the upper surface of the middle shell 2 to shield the tail end of the third communicating channel 27.
The design of multichannel can make the oil in the oil storage chamber 22 of well casing 2 and first oil groove 21 can enter into the fuel sprayer through the oil outlet channel more fast, and the quick completion is rich oil and is discharged.
In this embodiment, the upper surface of the middle shell 2 is provided with a needle valve hole 28 communicated with the oil injection cavity 24;
the oil feed control switch system includes:
a needle valve seat 31 disposed within the needle valve bore 28;
the needle valve 32 is arranged in the oil injection cavity 24 and is connected with the needle valve seat 31;
a rocker pin 33 having one end connected to the valve needle;
a needle valve rocker 34 connected to the other end of the rocker pin 33;
the needle valve spring 35 has both ends respectively abutting against the needle valve rocker arm 34 and the inner wall of the oil injection chamber 24.
By the needle valve 32 and the corresponding structure, when the oil storage chamber 22 is under negative pressure, the elastic diaphragm 6 acts upwards under the action of the air chamber 71, the needle valve 32 is opened, oil in the oil storage chamber 22 is supplied to the oil injection chamber 24, and finally enters the air inlet channel 11 through the oil outlet 23 to be combusted and used.
In this embodiment, the carburetor body 1 further has a main orifice 18, the tail end of which is communicated with the intake passage 11 and the head end of which is communicated with the oil outlet 23; the carburetor body 1 is further provided with an idle oil passage hole 19, the tail end of the idle oil passage hole is communicated with the air inlet channel 11, and the head end of the idle oil passage hole is communicated with the oil outlet hole 23.
In this embodiment, the main metering orifice 18 is coaxially arranged with the oil outlet channel, the lower part of the oil outlet channel is of an expanding structure, and the head end of the idle oil passage is arranged at the expanding structure of the oil channel; the upper end of the pump membrane return spring 5 is arranged in the diameter expanding structure of the oil channel, and the diameter expanding structure of the oil channel limits the upper end of the pump membrane return spring 5.
In this embodiment, the carburetor body 1 is further provided with an air reservoir 101 on the lower surface thereof, and the air reservoir 101 is closed by the diaphragm 4.
The gas storage cavity 101 may form a certain air pressure, which acts as a reset for the first movable mold half and the second movable mold half.
In this embodiment, the method further includes:
and the middle gasket 8 is arranged between the middle shell 2 and the carburetor body 1 and plays a role in sealing.
And the lower gasket 9 is arranged between the middle shell 2 and the elastic membrane 6 and plays a role in sealing.
The middle gasket 8 and the lower gasket 9 are provided with openings corresponding to the parts connected thereto, which are not shown one by one in the drawings.
In this embodiment, the upper surface of the lower housing 7 is provided with an air chamber 71, the air chamber 71 is opposite to the ejection diaphragm 6, and the flat pressing hole 72 communicates the inside of the air chamber 71 with the outside atmosphere.
The air chamber 71 can form a stable large-area pressure force on the ejection diaphragm 6.
The carburetor for the general engine of the embodiment works in such a way that when the engine works, mixed gas in the air inlet channel 11 enters the engine through the air inlet air door 12, when air inlet cannot meet atmospheric pressure, the negative pressure hole 102 connected with the air inlet channel 11 and the oil storage cavity 22 connected with the negative pressure hole 102 form negative pressure, and at the moment, the external oil injection mechanism feeds oil into the oil storage cavity 22 under the action of atmospheric pressure. When the oil injection cavity 24 connected with the main nozzle 15 through the oil outlet 23 forms negative pressure, the elastic diaphragm 6 moves upwards under the action of the air chamber 71, the needle valve rocker arm 34 of the oil inlet control switch system moves upwards, the needle valve 32 is opened, oil in the oil storage cavity 22 is supplied to the oil injection cavity 24 through the needle valve hole 28, and oil is injected to the main nozzle 15 and the idle oil passage hole 19 through the oil outlet 23, so that the continuous operation of the engine is realized, and the operating state of continuous oil supply of the carburetor is realized.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or substituted by equivalents without departing from the spirit and scope of the technical solutions, which should be covered by the scope of the claims of the present invention.
Claims (10)
1. A carburetor for a general gasoline engine comprises a carburetor body, wherein a penetrating air inlet channel is arranged at the upper part of the carburetor body, an air inlet air door for adjusting air inflow, a throat pipe for reducing the ventilation section and an air mixing air door for adjusting the air flow of a mixer are sequentially arranged along the air inlet channel, a main nozzle is arranged at the throat pipe and is communicated with the lower surface of the carburetor body through an oil outlet channel; the bottom of the carburetor is provided with an oil channel groove; an oil inlet bent pipe is arranged on the side surface of the carburetor body, and the tail part of the oil inlet bent pipe is communicated with the oil duct groove; the air inlet structure is characterized in that a negative pressure hole is formed in the air inlet channel; further comprising:
the middle shell is arranged right below the carburetor body; the upper surface is provided with a first oil groove which is communicated with the oil duct groove; the upper surface is provided with an oil storage cavity which is communicated with the negative pressure hole and is also provided with a penetrating oil outlet hole which is communicated with the main nozzle; an oil inlet control switch system is arranged in the oil injection cavity, and the oil injection cavity is controlled to be communicated with the oil storage cavity;
the diaphragm is arranged between the middle shell and the lower surface of the carburetor body, and is provided with a movable valve for sealing the first oil groove and a through hole for communicating the oil outlet with the main nozzle;
the pump membrane return spring is arranged on the lower surface of the carburetor body and used for returning the movable valve to close the first oil groove;
the elastic membrane is arranged on the lower surface of the middle shell and seals the oil injection cavity on the lower surface of the middle shell;
the lower shell is arranged on the lower surface of the elastic membrane, and a penetrating flat pressing hole is formed in the lower shell and is opposite to the elastic membrane.
2. The carburetor of claim 1, wherein the middle housing has a first communication channel, a head end communicating with the oil storage chamber and a tail end passing through the middle housing body and communicating with the upper surface of the middle housing body, and facing the movable valve; the movable valve is attached to the upper surface of the middle shell to shield the tail end of the first connecting channel.
3. The carburetor of claim 2, wherein the middle housing has a second communication channel, a head end communicating with the first oil groove and a tail end passing through the middle housing body and communicating with the upper surface of the middle housing body and facing the movable valve; the movable valve is attached to the upper surface of the middle shell and shields the tail end of the second communicating channel.
4. The carburetor of claim 3, wherein the movable valve is two, the first movable valve covering the first communication passage and the trailing end of the second communication passage;
the middle shell is provided with a third communicating channel, the head end of the third communicating channel is communicated with the oil storage cavity, and the tail end of the third communicating channel penetrates through the middle shell body, is communicated with the upper surface of the middle shell body and is opposite to the second movable valve; the second movable valve is attached to the upper surface of the middle shell to shield the tail end of the third communicating channel.
5. The carburetor of claim 1, wherein the middle housing has a needle valve hole on an upper surface thereof, the needle valve hole communicating with the fuel injection chamber;
the oil feed control switch system includes:
the needle valve seat is arranged in the needle valve hole;
the needle valve is arranged in the oil injection cavity and is connected with the needle valve seat;
one end of the rocker pin is connected with the valve needle;
the needle valve rocker is connected with the other end of the rocker pin;
and two ends of the needle valve spring are respectively abutted against the needle valve rocker arm and the inner wall of the oil injection cavity.
6. The carburetor of claim 1, wherein the carburetor body further has a main metering orifice, the rear end of the carburetor body communicates with the intake passage, and the head end of the carburetor body communicates with the outlet orifice; the carburetor body is further provided with an idling oil passage hole, the tail end of the carburetor body is communicated with the air inlet passage, and the head end of the carburetor body is communicated with the oil outlet hole.
7. The carburetor of claim 6, wherein the main metering orifice is coaxially disposed with an oil outlet passage, a lower portion of the oil outlet passage is of an enlarged diameter structure, and a head end of the idle oil passage is disposed at the enlarged diameter structure of the oil passage; the upper end of the pump membrane return spring is arranged in the diameter expanding structure of the oil channel, and the diameter expanding structure of the oil channel limits the upper end of the pump membrane return spring.
8. The carburetor according to claim 1, wherein the carburetor body further includes an air reservoir chamber formed in a lower surface thereof, the air reservoir chamber being closed by a diaphragm.
9. The carburetor according to claim 1, further comprising:
the middle gasket is arranged between the middle shell and the carburetor body and plays a role in sealing;
and the lower gasket is arranged between the middle shell and the elastic membrane and plays a role in sealing.
10. The carburetor of claim 1, wherein the lower housing has an air chamber on the upper surface thereof, the air chamber facing the diaphragm, and the flat pressure hole communicating the inside of the air chamber with the outside atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223247553.6U CN218563763U (en) | 2022-12-05 | 2022-12-05 | Carburetor for general gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223247553.6U CN218563763U (en) | 2022-12-05 | 2022-12-05 | Carburetor for general gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218563763U true CN218563763U (en) | 2023-03-03 |
Family
ID=85305020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223247553.6U Active CN218563763U (en) | 2022-12-05 | 2022-12-05 | Carburetor for general gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218563763U (en) |
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2022
- 2022-12-05 CN CN202223247553.6U patent/CN218563763U/en active Active
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