CN112377334A

CN112377334A - Pure gasoline engine assembly

Info

Publication number: CN112377334A
Application number: CN202011180872.2A
Authority: CN
Inventors: 陈其安; 贾永成
Original assignee: Zhejiang Rising Carburetor Manufacturing Co ltd
Current assignee: Zhejiang Rising Carburetor Manufacturing Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-02-19
Anticipated expiration: 2040-10-29
Also published as: CN112377334B

Abstract

The invention relates to the technical field of engines, in particular to a pure gasoline engine component. The pure gasoline comprises an engine unit and a carburetor, wherein the engine unit is provided with an air inlet channel, and the carburetor is arranged at the air inlet channel and communicated with the air inlet channel; the pure gasoline engine component also comprises a lubricating pipeline, a chamber for storing organic oil mist is arranged in the engine unit, the carburetor comprises a body and an enrichment valve body, the body is provided with an enrichment valve hole, and the enrichment valve body is slidably arranged in the enrichment valve hole and used for extruding or sucking fuel oil; one end of the lubricating pipeline is communicated with the cavity, and the other end of the lubricating pipeline is communicated with the enrichment valve hole, so that part of engine oil mist in the cavity can flow to the enrichment valve hole through the lubricating pipeline. The invention has the advantages that: effectively improving the clamping stagnation problem of the enrichment valve body in the movement process and improving the overall working performance of the engine unit.

Description

Pure gasoline engine assembly

Technical Field

The application relates to the technical field of engines, in particular to a pure gasoline engine assembly.

Background

An engine assembly is one of the important components of a gasoline engine, which generally includes an engine and a carburetor. The carburetor is also an important accessory of the gasoline engine, namely the heart of the engine, and mixes a certain amount of fuel with air and respectively provides required mixed gas according to the requirements of the engine under various working conditions so as to ensure that the engine runs normally. In the existing market, the types of carburetors are various, and a diaphragm carburetor and a float carburetor are available, and the diaphragm carburetor includes a butterfly valve type, a rotary valve type and the like.

Currently, when an engine is matched with a carburetor with an enrichment valve, the enrichment valve moves back and forth in the carburetor to realize the extrusion and suction of fuel. But because part of the fuel used by the engine is pure gasoline; at this time, the enrichment valve in the carburetor is not lubricated by engine oil, and the enrichment valve has the problem of jamming in the movement process, so that the acceleration of the engine is poor.

Disclosure of Invention

In view of the above, it is desirable to provide a pure gasoline engine assembly that can avoid the problem of motion sticking of the enrichment valve body and improve the acceleration performance of the engine.

In order to achieve the purpose, the technical scheme provided by the application is as follows:

a pure gasoline engine component comprises an engine unit and a carburetor, wherein the engine unit is provided with an air inlet channel, and the carburetor is arranged at the air inlet channel and communicated with the air inlet channel;

the pure gasoline engine component also comprises a lubricating pipeline, a cavity for storing organic oil mist is arranged in the engine unit, the carburetor comprises a body and an enrichment valve body, the body is provided with an enrichment valve hole, the enrichment valve comprises an enrichment valve body, and the enrichment valve body is slidably arranged in the enrichment valve hole and used for extruding or sucking fuel oil;

one end of the lubricating pipeline is communicated with the cavity, and the other end of the lubricating pipeline is communicated with the enrichment valve hole, so that part of engine oil mist in the cavity can be guided to the enrichment valve hole through the lubricating pipeline.

It can be understood that by arranging the lubricating pipeline, part of oil mist/engine oil stored with lubricating performance is guided to the position of the enrichment valve hole skillfully, so that the enrichment valve body is lubricated by the oil mist/engine oil, the clamping stagnation problem in the movement process of the enrichment valve body is effectively solved, and the integral working performance of an engine unit is improved; meanwhile, by utilizing a mechanism that parts in the pure gasoline engine component need to be lubricated, part of engine oil/engine oil mist is led out to solve the lubricating problem of other parts, so that the whole structure of the gasoline engine component is more compact, the parts do not need to be arranged independently, and the cost is lower.

In one embodiment, the engine unit comprises an engine, the engine is provided with an air inlet-outlet valve cavity, the cavity is the air inlet-outlet valve cavity, one end of the lubricating pipeline is installed on the engine and communicated with the air inlet-outlet valve cavity, and the other end of the lubricating pipeline is communicated with the enrichment valve hole so as to guide part of the engine oil mist in the air inlet-outlet valve cavity to the enrichment valve hole.

It is understood that the intake-exhaust valve chamber is provided with an intake valve and an exhaust valve, and the intake valve and the exhaust valve are matched with each other to realize the feeding and the discharging of the fuel of the engine; the inlet valve and the exhaust valve also need to be lubricated in the movement process, so that engine oil/engine oil mist is stored in the inlet-exhaust valve cavity; the oil mist in the oil inlet-exhaust valve cavity is guided to the position of the enrichment valve hole through the lubricating pipeline to lubricate the enrichment valve body by skillfully arranging and utilizing the characteristic of the oil mist of the engine, so that the problem that the enrichment valve body in a carburetor is not lubricated by the engine oil in a four-stroke engine using pure gasoline is solved, and the clamping stagnation of the movement of the enrichment valve body is avoided.

In one embodiment, the engine unit comprises an engine and an oil can, and the pure gasoline engine assembly further comprises a chain plate unit and a first pipeline, wherein one end of the first pipeline is communicated with the oil can, and the other end of the first pipeline is connected with the chain plate unit so as to guide the oil/oil mist in the oil can to the chain plate unit;

the cavity does the machine oil kettle, the one end of lubricated pipeline with first pipeline intercommunication, the other end with enrichment valve opening intercommunication, with will partial machine oil/machine oil fog guide enrichment valve opening in the first pipeline.

It will be appreciated that in some arrangements, the provision of a slave oiler to provide the lubricating medium is provided because the flight unit itself also requires lubrication during use. The lubricating pipeline guides part of engine oil/engine oil mist pumped out of the engine oil pot by the engine oil pump to the enrichment valve hole to lubricate the enrichment valve body, so that the problem that the enrichment valve body in the carburetor is not lubricated by the engine oil in a four-stroke engine using pure gasoline is effectively solved, and the clamping stagnation of the movement of the enrichment valve body is avoided; meanwhile, by utilizing a mechanism that parts in the pure gasoline engine component need to be lubricated, part of engine oil/engine oil mist is led out to solve the lubricating problem of other parts, so that the whole structure of the gasoline engine component is more compact, the parts do not need to be arranged independently, and the cost is lower.

In one embodiment, the pure gasoline engine assembly further comprises a second pipeline, the engine is provided with an air inlet-exhaust valve cavity, and the cavity is the air inlet-exhaust valve cavity and/or the engine oil pot;

one end of the second pipeline is communicated with the air inlet-exhaust valve cavity, and the other end of the second pipeline is communicated with the first pipeline or the other end of the second pipeline is communicated with the enrichment valve hole. Namely, part of the engine oil mist in the direct air inlet-outlet valve cavity can be directly guided to the enrichment valve hole through the second pipeline, and at the moment, the second pipeline is the lubricating pipeline.

It can be understood that by arranging the second pipeline, after part of the oil mist in the air inlet-outlet valve cavity is guided out and is converged with the oil mist in the first pipeline, part of the oil mist in the first pipeline is guided to the position of the enrichment valve hole through the lubricating pipeline, the supply of the oil mist at the position of the enrichment valve hole can be fully ensured, the lubrication of the enrichment valve body is more sufficient, and the clamping stagnation of the movement of the enrichment valve body is further avoided.

In one embodiment, the all-gasoline engine assembly further comprises an insulated seat through which the carburetor is mounted on the engine;

the heat insulation seat is provided with a connecting hole, the connecting hole is communicated with the enrichment valve hole, and one end of the lubricating pipeline, which is far away from the engine unit, is communicated with the connecting hole.

It will be appreciated that the provision of the insulating seat can block heat from the engine to prevent heat generated by the engine unit from affecting the normal operation of the carburettor.

In one embodiment, two ends of the connecting hole are positioned on two different planes on the heat insulation seat, and one end of the communicating hole is positioned on the surface of the heat insulation seat connected with the carburetor and corresponds to the enrichment valve hole.

In one embodiment, the carburetor further includes a throttle shaft rotatably mounted to the body and capable of driving the enrichment valve body to slide within the enrichment valve bore during rotation.

It will be appreciated that the throttle shaft primarily controls the amount of fuel being fed through the throttle, and the enrichment valve body/valve serves to force fuel out of the enrichment valve bore through the throttle shaft in conjunction with the enrichment valve body during acceleration of the engine unit, for the purpose of improving the acceleration of the engine.

In one embodiment, the throttle shaft is provided with a convex part, the convex part is positioned in the enrichment valve hole, and in the rotating process of the throttle shaft, the convex part can be abutted against the enrichment valve body and drives the enrichment valve body to slide in the enrichment valve hole.

In one embodiment, the enrichment valve further comprises a sealing element and an elastic element, the sealing element is sleeved on the enrichment valve body, the elastic element is contained in the enrichment valve hole, the sealing element is used for sealing a gap between the enrichment valve body and the inner wall of the enrichment valve hole, one end of the elastic element abuts against the enrichment valve body, and the other end of the elastic element is located at the bottom of the enrichment valve hole. In one embodiment, the main body is internally provided with a throat pipe, a metering chamber, a first oil path, a second oil path and a main nozzle, a groove is arranged on the outer wall of the main nozzle, one end of the first oil path is communicated with the enrichment valve hole, and the other end of the first oil path is communicated with the groove;

when the throttle shaft rotates from an idle position to a full-open position, the enrichment valve body moves under the action of the convex part, the space in the enrichment valve hole is reduced to generate positive pressure, and fuel in the enrichment valve hole flows into the groove through the first oil passage and enters the throat pipe from the outlet of the main nozzle;

when the throttle shaft rotates from a full-open position to an idle position, the enrichment valve body moves under the action of the spring, the space in the enrichment valve hole is increased to generate negative pressure, and fuel in the metering chamber enters the groove through the second oil path and enters the enrichment valve hole through the first oil path.

In one embodiment, the engine is a four-stroke engine.

Compared with the prior art, the pure gasoline engine component skillfully guides part of oil mist/engine oil with lubricating performance stored to the position of the enrichment valve hole by arranging the lubricating pipeline, so that the enrichment valve body is lubricated by the oil mist/engine oil, the clamping stagnation problem in the movement process of the enrichment valve body is effectively solved, and the integral working performance of an engine unit is improved; meanwhile, by utilizing a mechanism that parts in the pure gasoline engine component need to be lubricated, part of engine oil/engine oil mist is led out to solve the lubricating problem of other parts, so that the whole structure of the gasoline engine component is more compact, the parts do not need to be arranged independently, and the cost is lower.

Drawings

FIG. 1 is a schematic illustration of a structure of a pure gasoline engine assembly provided herein.

Fig. 2 is a schematic structural diagram of a pure gasoline engine assembly with a chain plate unit provided by the application.

Fig. 3 is another schematic structural diagram of the pure gasoline engine assembly with the chain plate unit provided by the application.

FIG. 4 is a cross-sectional view of a throttle valve on a carburetor of the present application in a wide open position.

FIG. 5 is another perspective cross-sectional view of a throttle valve on a carburetor of the present application in a wide open position.

FIG. 6 is a side view of a carburetor according to the present application with a throttle valve in a fully open position.

FIG. 7 is an enlarged cross-sectional view taken at A-A of FIG. 6 as provided herein.

FIG. 8 is a side view of a throttle valve on a carburetor of the present application in an idle state.

FIG. 9 is an enlarged cross-sectional view taken at B-B of FIG. 8 as provided herein.

FIG. 10 is a schematic perspective view of a primary nozzle provided herein.

FIG. 11 is a schematic view of the flow of fuel within the carburetor when the throttle valve of the present application is rotated from an idle position to a wide open position.

FIG. 12 is a schematic view of the flow of fuel within the carburetor when the throttle valve of the present application is rotated from the wide open position to the idle position.

In the figure, 100, a pure gasoline engine assembly; 101. machine oil mist; 100a, an engine unit; 10. an engine; 11. an air intake passage; 12. a heat insulation seat; 121. a through hole; 122. connecting holes; 13. a chamber; 14. an intake-exhaust valve cavity; 15. an intake valve; 16. an exhaust valve; 17. an engine oil pot; 18. a housing; 10a, a crankshaft; 10b, a connecting rod; 10c, a piston; 10d, a spark plug; 10e, a silencer; 10f, a combustion chamber; 10g, an oil inlet; 10h, an air outlet; 10i and an output shaft; 10j, an oil pump; 10k, a transmission piece; 20. a carburetor; 21. a body; 211. an enrichment valve bore; 212. an air outlet; 213. an air inlet; 214. a main nozzle; 2141. a nozzle oil inlet; 2142. a groove; 21a, a mixing chamber; 21b, a throat; 21c, a metering chamber; 21d, a first oil passage; 21f, a second oil passage; 21g, mounting holes; 22. an enrichment valve; 221. a thickening valve body; 222. a seal member; 223. an elastic member; 23. a throttle shaft; 231. a throttle valve; 24. a choke shaft; 241. a choke valve; 232. a convex portion; 30. lubricating the pipeline; 40. a link plate unit; 41. a chain plate; 42. a chain saw; 50. a first pipeline; 60. a second pipeline; 200. and (4) a chain saw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the present application provides a pure gasoline engine assembly 100, wherein the pure gasoline engine assembly 100 can be used in garden machines such as lawn mowers, oil saws and the like, and is used as a power output component of the garden machines. Of course, the pure gasoline engine assembly 100 is not limited to the garden machine exemplified above, but may be applied to other machines than garden machines.

Specifically, the pure gasoline engine assembly 100 mainly includes an engine unit 100a and a carburetor 20, and the engine unit 100a is mainly used for converting fuel into mechanical energy to drive a cutting member on a machine to work. The carburetor 20 is mounted on the engine unit 100a, and mainly provides the engine unit 100a with a mixed fuel, such as air and fuel, in a suitable ratio to make the power output of the engine unit 100a more stable.

Specifically, the engine unit 100a includes an engine 10, and the engine 10 is a conventional engine used in existing gardening equipment, and the detailed specific structure thereof is not described herein. The engine 10 is provided with an intake passage 11, a carburetor 20 is mounted on the intake passage 11, and the mixed fuel adjusted by the carburetor 20 enters a combustion chamber of the engine 10 through the intake passage 11 to be combusted.

Further, as shown in fig. 1, an insulating seat 12 is disposed at an air inlet 11 of the engine 10, the diaphragm carburetor 20 is mounted on the insulating seat 12, and the insulating seat 12 is used for blocking heat of the engine 10 to prevent the heat of the engine 10 from affecting the normal operation of the diaphragm carburetor 20. The heat insulating base 12 has a through hole 121, and the intake passage 11 communicates with the carburetor 20 through the through hole 121.

Preferably, the heat insulating base 12 is fixed to the engine 10 by fasteners such as screws, bolts, or the like. The carburetor 20 is also secured to the heat shield base 12 by fasteners such as screws, bolts, or the like. The heat insulation seat 12 is made of a material with good heat insulation effect, such as plastic, phenolic resin, and the like.

As shown in fig. 1, the pure gasoline engine assembly 100 further includes a lubrication line 30, a chamber 13 for storing organic oil mist is provided in the engine unit 100a, the carburetor 20 includes a body 21 and an enrichment valve 22, the body 21 is provided with an enrichment valve hole 211, the enrichment valve 22 includes an enrichment valve body 221, and the enrichment valve body 221 is slidably mounted in the enrichment valve hole 211 and is used for extruding or sucking fuel; one end of the lubrication line 30 communicates with the chamber 13 and the other end communicates with the enrichment valve hole 211 so that a portion of the oil mist 101 (i.e., atomized oil) in the chamber 13 can be directed to the enrichment valve hole 211 through the lubrication line 30.

It should be explained that the engine 10 in the engine unit 100a generally includes a two-stroke engine and a four-stroke engine. In the case of a two-stroke engine, when the carburetor 20 with the enrichment valve 22 is used, since the two-stroke engine uses a mixture of gasoline and engine oil as fuel, the enrichment valve body 221 in the carburetor 20 is lubricated by the engine oil, and the problem of seizure of the enrichment valve body 221 does not generally occur. However, when the carburetor 20 with the enrichment valve 22 is used in a four-stroke engine, the fuel used in the four-stroke engine is pure gasoline, the enrichment valve body 221 in the carburetor 20 is not lubricated by engine oil, and the enrichment valve body 221 is stuck in the movement process, so that the acceleration performance of the engine is poor. Therefore, the lubrication pipeline 30 is arranged, so that part of the oil mist 101 in the chamber 13 for storing the organic oil mist 101 in the engine 10 is guided to the enrichment valve hole 211 skillfully, the oil mist 101 at the position is used for lubricating the enrichment valve body 221, the problem of clamping stagnation in the movement process of the enrichment valve body 221 is effectively solved, and the overall working performance of the engine 10 is improved.

Of course, it should be understood that engine 10 may be other stroke engines, such as six-stroke and eight-stroke engines, which may also use pure gasoline, and is not limited to four-stroke engines, which are only used as an example to illustrate the inventive concepts of the present application. Preferably, the lubrication line 30 may be externally disposed to the engine unit 100a, or the lubrication line 30 may be internally disposed. In this embodiment, the lubrication pipeline 30 is externally disposed, so that the arrangement and the processing are more convenient and the cost is lower.

Further, as shown in fig. 1, the engine 10 is provided with an intake-exhaust valve chamber 14, the chamber 13 is the intake-exhaust valve chamber 14, one end of the lubricating pipeline 30 is communicated with the intake-exhaust valve chamber 14, and the other end is communicated with the enrichment valve hole 211, so that part of the oil mist in the intake-exhaust valve chamber 14 is guided to the enrichment valve hole 211. It will be appreciated that the engine 10 itself has intake and

exhaust valves

15, 16, with the intake and

exhaust valves

15, 16 being located in the intake-exhaust valve chamber 14. Intake valve 15 and exhaust valve 16 cooperate to effect the charging and discharging of fuel from engine 10; the intake valve 15 and the exhaust valve 16 also need lubrication during movement, so that the organic oil mist 101 is stored in the intake-exhaust valve chamber 14; in the invention, the enrichment valve body 221 is lubricated by skillfully arranging and guiding part of the engine oil/engine oil mist 101 in the air inlet-exhaust valve cavity 14 to the enrichment valve hole 211 through the lubricating pipeline 30, so that the problem that the enrichment valve body 221 in the carburetor 20 is not lubricated by the engine oil in a pure gasoline engine 10 is solved, and the clamping stagnation of the movement of the enrichment valve body 221 is avoided; meanwhile, by utilizing a mechanism that parts in the pure gasoline engine component 100 need to be lubricated, part of engine oil/engine oil mist is led out to solve the lubricating problem of the enrichment valve body 221, so that the whole structure is more compact, parts do not need to be arranged independently, and the cost is lower.

As shown in fig. 1, the engine 10 includes a housing 18, a crankshaft 10a, a connecting rod 10b, a piston 10c, an ignition plug 10d, a muffler 10e, and the like, wherein the housing 18 has a combustion chamber 10f therein, and the housing 18 is opened with an oil inlet 10g and an air outlet 10 h. A crankshaft 10a, a connecting rod 10b, and a piston 10c are provided in the housing 18, and one end of the connecting rod 10b is connected to the crankshaft 10a and the other end is connected to the piston 10c, and an ignition plug 10d is provided at the combustion chamber 10f for igniting the fuel introduced into the combustion chamber 10 f. The silencer 10e is installed at the gas outlet 10h, and is used for silencing the waste gas at the gas outlet 10h and then discharging the waste gas. One end of the air inlet valve 15 is positioned in the air inlet-exhaust valve cavity 14, and the other end of the air inlet valve extends into the combustion chamber 10f from the oil inlet 10g and is used for controlling the opening/closing of the oil inlet 10g so as to control the on/off between the carburetor 20 and the combustion chamber 10f, namely, the fuel regulated by the carburetor 20 enters the combustion chamber 10 f. One end of the exhaust valve 16 is located in the intake-exhaust valve chamber 14, and the other end thereof is extended into the combustion chamber 10f so that the outlet 10h is extended into the combustion chamber 10f for controlling the opening/closing of the outlet 10h, so that exhaust gas obtained after the fuel is combusted in the combustion chamber 10f is discharged from the outlet 10 h.

When the engine 10 is operated, the crankshaft 10a rotates to move the connecting rod 10b and the piston 10c up and down to generate a vacuum negative pressure, and the intake valve 15 and the exhaust valve 16 are sequentially opened by the crankshaft 10 a. In the intake stroke, the intake valve 15 is opened and the exhaust valve 16 is closed, and at this time, the vacuum negative pressure generated by the piston 10c sucks fuel from the carburetor 20 into the intake passage 11 of the engine 10, and then enters the combustion chamber 10f from the oil inlet 10g, and is ignited by the spark plug 10d to perform combustion work. In the exhaust stroke, the exhaust valve 16 is opened and the intake valve 15 is closed, and the burned exhaust gas is discharged from the outlet 10h, enters the muffler 10e, and is discharged from the muffler 10e to the outside.

As shown in fig. 2, in an embodiment, the pure gasoline engine assembly 100 further includes a chain plate unit 40, the chain plate unit 40 is connected to the engine 10, and the chain plate unit 40 can perform a corresponding cutting operation under the driving of the engine 10, when the pure gasoline engine assembly 100 is integrally applied to the chain saw 200. The chain plate unit 40 comprises a chain plate 41 and a chain saw 42, the chain plate 41 is connected with the engine 10, the chain saw 42 is sleeved on the chain plate 41, the chain plate 41 and the chain saw 42 also need to be lubricated in the using process, therefore, an engine oil pot 17 is further arranged in the engine unit 100a, the engine oil pot 17 is used for storing engine oil, and in the embodiment, the chamber 13 is replaced by the engine oil pot 17. The pure gasoline engine assembly 100 further comprises a first pipeline 50 and an oil pump, wherein one end of the first pipeline 50 is communicated with the oil pump 10j, the other end of the oil pump 10j is communicated with the oil can 17, and the other end of the first pipeline 50 is communicated with the chain plate 41 and the chain saw 42, so that engine oil/engine oil mist in the oil can 17 is guided to the chain plate 41 and the chain saw 42 through the first pipeline 50, and the chain plate 41 and the chain saw 42 are lubricated;

further, one end of the lubrication pipeline 30 is communicated with the first pipeline 50, and the other end is communicated with the enrichment valve hole 211, so that part of the oil/oil mist in the first pipeline 50 is guided to the enrichment valve hole 211 to lubricate the enrichment valve body 221, the problem that the enrichment valve body 221 in the carburetor 20 is not lubricated by the oil in the pure gasoline engine 10 is effectively solved, and the clamping stagnation of the movement of the enrichment valve body 221 is avoided. It can be understood that, the above-mentioned lubrication manner effectively utilizes the characteristics of the chain plate 41 and the chain saw 42 that need to be lubricated, and does not need to additionally add a component containing lubricating oil to lubricate the enrichment valve body 221, so that the whole structure is more compact and the cost is lower.

In the embodiment described above, in which the pure gasoline engine assembly 100 further includes the second conduit 60, the chamber 13 may be formed by a combination of the intake-exhaust valve chamber 14 and the oil sump 17; the second pipe 60 has one end communicating with the intake-exhaust valve chamber 14 and the other end communicating with the first pipe 50. It will be appreciated that by providing the second conduit 60 so as to also guide out a portion of the oil mist in the inlet-outlet valve chamber 14 and join the oil mist in the first conduit 50, and then guiding a portion of the oil mist in the first conduit 50 to the enrichment valve opening 211 through the lubrication conduit 30, the supply of the oil mist at the enrichment valve opening 211 can be sufficiently ensured, so that the lubrication of the enrichment valve body 221 is more sufficient, and the jamming of its movement is further avoided. Of course, in another embodiment, one end of the second pipeline 60 is connected to the intake-exhaust valve chamber 14, and the other end can also be directly communicated with the enrichment valve hole 211, that is, the second pipeline 60 is used as the lubrication pipeline 30, and the lubrication pipeline 30, which is originally connected to the first pipeline 50 at one end and communicated with the enrichment valve hole 211 at the other end, can be directly removed. That is, the lubrication chain plate unit 40 and the lubrication enrichment valve body 221 are implemented by two independent pipelines, and the oil/oil mist 101 in the two independent pipelines comes to different places.

It will be appreciated that in this embodiment, the engine 10 further comprises an output shaft 10i, a transmission member 10k, etc., the output shaft 10i being connected to the crankshaft 10a, and an oil pump 10j also being connected to the output shaft 10i for delivering oil/oil mist from the oil sump 17 into the first conduit 50. The transmission 10k has one end connected to the output shaft 10i and the other end connected to the intake valve 15 and the exhaust valve 16 via a shaft.

As shown in fig. 4 to 12, in the present embodiment, the basic structure of the carburetor 20 will not be described again. The present embodiment focuses on how the carburetor 20 performs mixing, intake, and discharge of fuel.

Specifically, the carburetor 20 further includes a throttle shaft 23 and a choke shaft 24, the body 21 has an air outlet 212 and an air inlet 213, the throttle shaft 23 is provided with a throttle 231, the choke shaft 24 is provided with a choke valve 241, the throttle shaft 23 is rotatably mounted on the body 21, the throttle 231 is located at the air outlet 212 and can rotate along with the throttle shaft 23 to control the opening of the air outlet 212, so as to control the amount of fuel entering from the air outlet 212. The choke shaft 24 is also rotatably installed on the body 21, and the choke valve 241 is located at the intake hole 213 and can control the opening degree of the intake hole 213 with the rotation of the choke shaft 24, thereby controlling the amount of intake air. It is necessary to close the choke valve 241 at the time of cold start of the engine 10 to reduce the amount of air entering the carburetor 20 while increasing the degree of vacuum at the throat 21b to increase the amount of fuel suctioned to make the engine 10 easier to start.

Further, during rotation of throttle shaft 23, enrichment valve body 221 may also be caused to slide within enrichment valve bore 211. It will be appreciated that the throttle shaft 23 is primarily used to control the amount of fuel entering and the enrichment valve body 221 is used for fuel expulsion and ingestion, and that the dosage of fuel into the carburetor 20 can be precisely controlled by the throttle shaft 23 in conjunction with the enrichment valve body 221.

Preferably, the throttle shaft 23 is provided with a protrusion 232, the protrusion 232 is located in the enrichment valve bore 211, and during rotation of the throttle shaft 23, the protrusion 232 can abut against the enrichment valve body 221 and drive the enrichment valve body 221 to slide in the enrichment valve bore 211.

As shown in fig. 7, the enrichment valve 22 further includes a sealing member 222 and an elastic member 223, the enrichment valve body 221 is slidably installed in the enrichment valve hole 211, and the sealing member 222 is sleeved on the enrichment valve body 221 for sealing a gap between the enrichment valve body 221 and an inner wall of the enrichment valve hole 211 to prevent fuel leakage. Elastic member 223 is received in enrichment valve bore 211, and one end of elastic member 223 abuts against enrichment valve body 221, and the other end is located and abuts against the bottom of enrichment valve bore 211, and elastic member 223 is used for resetting enrichment valve body 221.

Preferably, the elastic member 223 may be an O-ring, a shaft YX-ring, or the like.

Further, as shown in fig. 1, the heat insulation base 12 is provided with a connection hole 122, one end of the connection hole 122 is communicated with the enrichment valve hole 211, and the other end is communicated with the lubrication pipeline 30, that is, the oil mist 101 in the lubrication pipeline 30 enters the enrichment valve hole 211 through the connection hole 122.

It will be appreciated that the overall structure of the carburetor 20 is relatively complex and the size of the carburetor is relatively small, and that connecting the lubrication line 30 directly to the enrichment valve bore 211 of the carburetor 20 further complicates the structure of the carburetor 20 and may interfere with the linkage between the throttle shaft 23 and the choke shaft 24. Therefore, the lubrication pipeline 30 is connected with the heat insulation seat 12, and the oil mist 101 is guided to enter the enrichment valve hole 211 through the connecting hole 122 by opening the connecting hole 122 on the heat insulation seat 12, so that the problem is avoided.

Preferably, the connection hole 122 is substantially L-shaped, and one end of the connection hole 122 is on the surface of the heat insulating base 12 connected to the carburetor 20, and the other end is on the outer peripheral side surface of the heat insulating base 12 or other surface of the heat insulating base 12, as long as it is not the same as the surface of the heat insulating base 12 connected to the carburetor 20. It will be appreciated that by the above arrangement, the connection of the lubrication line 30 may be further facilitated and interference of the installation of the lubrication line 30 with the movement of other components may be avoided.

Referring to fig. 4 to 12, the main body 21 further includes a mixing chamber 21a, a throat 21b, a metering chamber 21c, a first oil passage 21d, a second oil passage 21f, a mounting hole 21g, and a main nozzle 214, the mixing chamber 21a is used for mixing the gas entering from the intake hole 213 and the fuel entering from the throat 21b, the mixing chamber 21a is communicated with the intake passage 11, and the mixed fuel-gas enters the combustion chamber 10f of the engine 10 through the intake passage 11. The mounting hole 21g is provided between the measuring chamber 21c and the throat 21b, and the main nozzle 214 is mounted in the mounting hole 21 g. As shown in fig. 10, the main nozzle 214 has a nozzle oil inlet 2141 and is provided with a groove 2142 on its outer wall, the groove 2142 is communicated with the nozzle oil inlet 2141, the nozzle oil inlet 2141 is communicated with the throat 21b, one end of the first oil path 21d is communicated with the enrichment valve hole 211, and the other end is communicated with the groove 2142; one end of the second oil passage 21f communicates with the metering chamber 21c, the other end communicates with the groove 2142, and the first oil passage 21d and the second oil passage 21f are independently provided.

As shown in fig. 11, when the throttle shaft 23 or the throttle valve 231 is rotated from the idle position to the fully open position, the enrichment valve body 221 is moved by the protrusion 232, so that the space inside the enrichment valve hole 211 is reduced to generate a positive pressure, and the fuel in the enrichment valve hole 211 flows into the groove 2142 through the first oil passage 21d and enters the throat 21b from the nozzle oil inlet 2141.

As shown in fig. 12, when the throttle shaft 23 or the throttle valve 231 is rotated from the fully open position to the idle position, the enrichment valve body 221 is moved by the protrusion 232, and the space in the enrichment valve hole 211 is increased to generate a negative pressure, and the fuel in the metering chamber 21c enters the recess 2142 through the second oil passage 21f and enters the enrichment valve hole 211 through the first oil passage 21 d. This cyclic reciprocation of the throttle shaft 23 also causes the enrichment valve body 221 to reciprocate within the enrichment valve bore 211, enabling the enrichment valve body 221 to squeeze and draw fuel out, thereby improving the acceleration performance of the engine 10.

Preferably, the lobes 232 are provided as a cam structure. It can be understood that, the convex portion 232 is configured as a cam structure, which not only has simple structure, convenient processing and low cost, but also has stable operation.

The features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be construed as being within the scope of the present specification as long as there is no contradiction between the combinations of the features.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.

Claims

1. A pure gasoline engine component comprises an engine unit and a carburetor, wherein the engine unit is provided with an air inlet channel, and the carburetor is arranged at the air inlet channel and communicated with the air inlet channel;

the pure gasoline engine component is characterized by further comprising a lubricating pipeline, a cavity for storing organic oil mist is arranged in the engine unit, the carburetor comprises a body and an enrichment valve, the body is provided with an enrichment valve hole, the enrichment valve comprises an enrichment valve body, and the enrichment valve body is slidably mounted in the enrichment valve hole and used for extruding or sucking fuel oil;

one end of the lubricating pipeline is communicated with the cavity, and the other end of the lubricating pipeline is communicated with the enrichment valve hole, so that part of engine oil mist in the cavity can flow to the enrichment valve hole through the lubricating pipeline.

2. The gasoline only engine assembly of claim 1 wherein the engine unit comprises an engine having an intake-exhaust valve chamber therein, the chamber being the intake-exhaust valve chamber, the lubrication line having one end mounted to the engine and communicating with the intake-exhaust valve chamber and another end communicating with the enrichment valve aperture to direct a portion of the oil mist in the intake-exhaust valve chamber to the enrichment valve aperture.

3. The all-gasoline engine assembly according to claim 1, wherein the engine unit comprises an engine and a sump, the all-gasoline engine assembly further comprises a chain plate unit and a first pipeline, one end of the first pipeline is communicated with the sump, and the other end of the first pipeline is connected with the chain plate unit so as to guide the oil/oil mist in the sump to the chain plate unit;

4. The pure gasoline engine assembly as defined in claim 3 further comprising a second conduit, said engine having an inlet-outlet valve cavity, said cavity being said inlet-outlet valve cavity and/or said oil can;

one end of the second pipeline is communicated with the air inlet-exhaust valve cavity, and the other end of the second pipeline is communicated with the first pipeline or the other end of the second pipeline is communicated with the enrichment valve hole.

5. The all-gasoline engine assembly of claim 1, further comprising an insulated seat through which the carburetor is mounted on the engine;

6. The gasoline engine assembly as defined in claim 5, wherein both ends of the connection hole are located on two different planes of the heat insulating base, and one end of the connection hole is located on a surface of the heat insulating base connected to the carburetor and corresponds to the enrichment valve hole.

7. The all-gasoline engine assembly of claim 1, wherein the carburetor further includes a throttle shaft rotatably mounted to the body and capable of sliding the enrichment valve body within the enrichment valve bore during rotation.

8. The all-gasoline engine assembly of claim 7, wherein the throttle shaft is provided with a protrusion, the protrusion is located within the enrichment valve bore, and the protrusion is capable of abutting against the enrichment valve body and driving the enrichment valve body to slide within the enrichment valve bore during rotation of the throttle shaft.

9. The assembly of claim 8, wherein the enrichment valve further comprises a sealing member and an elastic member, the sealing member is sleeved on the enrichment valve body, the elastic member is accommodated in the enrichment valve hole, the sealing member is used for sealing a gap between the enrichment valve body and the inner wall of the enrichment valve hole, one end of the elastic member abuts against the enrichment valve body, and the other end of the elastic member is located at the bottom of the enrichment valve hole.

10. The gasoline-only engine assembly as defined in claim 9, wherein the body is internally provided with a throat, a metering chamber, a first oil passage, a second oil passage and a main nozzle, a groove is arranged on the outer wall of the main nozzle, one end of the first oil passage is communicated with the enrichment valve hole, and the other end of the first oil passage is communicated with the groove;

when the throttle shaft rotates from a full-open position to an idle position, the enrichment valve body moves under the action of the convex part, the space in the enrichment valve hole is increased to generate negative pressure, and fuel in the metering chamber enters the groove through the second oil path and enters the enrichment valve hole through the first oil path.