CN209743077U - Engine using liquefied petroleum gas as fuel - Google Patents
Engine using liquefied petroleum gas as fuel Download PDFInfo
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- CN209743077U CN209743077U CN201920504333.6U CN201920504333U CN209743077U CN 209743077 U CN209743077 U CN 209743077U CN 201920504333 U CN201920504333 U CN 201920504333U CN 209743077 U CN209743077 U CN 209743077U
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Abstract
The utility model discloses an engine using liquefied petroleum gas as fuel, which comprises an engine body and a fuel supply system, wherein the fuel supply system comprises an air inlet pipe, a pressure regulator and a carburetor assembly, and the air inlet pipe is connected with an air inlet of the pressure regulator; the carburetor assembly comprises a main shell, a Venturi tube is arranged in the main shell, a radial air vent is formed in the middle of the Venturi tube, an air inlet is formed in one end, corresponding to the Venturi tube, of the main shell, a throttle valve is arranged at the air inlet of the main shell, and a mixed gas outlet is formed in the other end, corresponding to the Venturi tube, of the main shell; the main casing body is fixedly connected with an auxiliary casing body in a sealing mode, the nozzle is arranged on the main casing body, the air inlet end of the nozzle is communicated with the inner cavity of the auxiliary casing body, the air outlet end of the nozzle is communicated with the inner cavity of the main casing body, the auxiliary casing body is provided with an air inlet joint, one end of the air inlet joint is communicated with the inner cavity of the auxiliary casing body, and the other end of the air. The utility model discloses the environmental protection is effectual, and can keep the engine to have more stable output.
Description
Technical Field
The utility model belongs to the technical field of the engine manufacturing technology and specifically relates to an adopt liquefied petroleum gas as engine of fuel.
Background
Most of the existing small engines use gasoline as fuel, and after the gasoline engine is operated, pollutants such as CO, HC, NOx and particulates are discharged, which can cause serious adverse effects on the environment. Liquefied petroleum gas such as natural gas has therefore been used as a fuel for engines to reduce emissions of harmful substances such as carbon monoxide and hydrocarbons. However, in the conventional engine using liquefied petroleum gas as fuel, because of the problem of stability of air source pressure and the problem of proportioning of liquefied petroleum gas and air, the power output of the engine is often unstable when the engine is used, and the working effect of the matched equipment is affected.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an adopt liquefied petroleum gas to be the engine of fuel, its environmental protection is effectual, and can keep the engine to have more stable output.
In order to achieve the above purpose, the technical scheme of the utility model is that: an engine using liquefied petroleum gas as fuel comprises an engine body and a fuel supply system, wherein the fuel supply system comprises an air inlet pipe, a pressure regulator and a carburetor assembly, one end of the air inlet pipe is connected with an air source, and the other end of the air inlet pipe is connected with an air inlet of the pressure regulator;
the carburetor assembly comprises a main shell, a Venturi tube is arranged in the main shell, a radial air vent is formed in the middle of the Venturi tube, an air inlet is formed in one end, corresponding to the Venturi tube, of the main shell, a throttle valve is arranged at the air inlet of the main shell, a mixed gas outlet is formed in the other end, corresponding to the Venturi tube, of the main shell, and the mixed gas outlet is communicated with an air inlet manifold or an air inlet valve of an;
The main casing body is fixedly connected with an auxiliary casing body in a sealing mode, a nozzle is arranged on the main casing body, the air inlet end of the nozzle is communicated with the inner cavity of the auxiliary casing body, the air outlet end of the nozzle is communicated with a cavity formed by the inner wall of the main casing body and the outer wall of a Venturi tube in a surrounding mode, an air inlet joint is arranged on the auxiliary casing body, one end of the air inlet joint is communicated with the inner cavity of the auxiliary casing body.
preferably, the axial direction of the nozzle is mutually perpendicular to the axial direction of the Venturi tube, and the position of the air outlet end of the nozzle corresponds to the vent hole.
Preferably the engine body is four-stroke engine, the main casing body is square casing, is equipped with two venturi and two nozzles that are parallel to each other on the main casing body, the axial of every nozzle and venturi's axial mutually perpendicular, and the position of every nozzle end of giving vent to anger corresponds on a venturi the air vent, one side of the main casing body are equipped with two air inlet and correspond two venturi's one end respectively, and the opposite side of the main casing body is equipped with two mixed gas exports and corresponds two venturi's the other end respectively.
Preferably the air inlet that the main casing body corresponds every venturi one end is circular form, throttle valve includes a pivot joint in the main casing body on, fixes two circular valve plates in the pivot, and every circular valve plate corresponds an air inlet, drives circular valve plate through the pivot and rotates the air admission volume of adjusting main casing body air inlet.
Preferably, the vent holes are distributed along the circumferential direction of the Venturi tube, the cross sections are formed at the positions of the vent holes along the circumferential direction of the Venturi tube, and the arc length formed by the vent holes is 8/10-9/10 of the circumferential length of the vent holes; the axial length of the vent hole along the Venturi tube is 1/20-1/10 of the axial length of the Venturi tube.
In a further improvement, a fuel control valve is arranged between the air inlet pipe and the air source, and the fuel control valve opens or closes the communication between the air inlet pipe and the air source.
Still further, the fuel control valve is an electromagnetic gate valve, an ignition switch is mounted on the engine body, and the fuel control valve is opened simultaneously when the ignition switch is ignited.
Preferably the liquefied petroleum gas is propane or butane or natural gas.
When liquefied petroleum gas passes through the air inlet pipe, the pressure of the air inlet of the pressure regulator is preferably 200-250 psi, namely the pressure of the air inlet of the pressure regulator is 1.379-1.72375 Mpa; the pressure at the air outlet of the pressure regulator is 1-5 psi, namely 0.006895-0.034475 MPa.
still further, it is preferred that the pressure at the outlet of the pressure regulator is 4 psi, i.e. 0.02758 Mpa.
The utility model discloses following beneficial effect has:
1. the liquefied petroleum gas is used as fuel to supply the engine, so that the discharge of harmful substances such as carbon monoxide, hydrocarbon and the like can be greatly reduced during the operation of the engine, and the engine has a good environment-friendly effect. The device is also suitable for being used indoors for a long time, and is convenient to be used as power of floor polishing machines, grinders and other equipment.
2. fuel supply system makes liquefied petroleum gas get into the auxiliary casing inner chamber after adjusting suitable pressure through pressure regulator after passing through the intake pipe earlier, and liquefied petroleum gas spouts the cavity that main casing inner wall and venturi outer wall enclose through the nozzle after the auxiliary casing inner chamber obtains buffering and steady voltage, then forms the air that the mist got into by the cylinder of engine and inhales burning doing work with main casing air inlet in getting into venturi through the air vent at venturi middle part. Therefore, the mixed gas supplied to the engine cylinder is stable, and the stable output power of the engine is ensured.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a perspective view of the fuel supply system of the present invention;
FIG. 3 is an exploded perspective view of the carburetor assembly of the present invention;
FIG. 4 is a front view of the venturi;
FIG. 5 is a sectional view A-A of FIG. 4;
FIG. 6 is a front view of the nozzle;
Fig. 7 is a sectional view B-B of fig. 6.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
1-7, an engine using liquefied petroleum gas as fuel comprises an engine body 1 and a fuel supply system 10, wherein the engine body 1 is a four-stroke engine, the fuel supply system 10 comprises an air inlet pipe 2 with one end connected with an air source, a pressure regulator 3 and a carburetor assembly 4, and the other end of the air inlet pipe 2 is connected with an air inlet of the pressure regulator 3; the two ends of the air inlet pipe 2 can be provided with quick connectors 21 so as to be convenient for installation and connection; the source of gas may be a tank 11 filled with liquefied petroleum gas, which may be propane or butane or natural gas, preferably propane.
The carburetor assembly 4 comprises a main shell 41, the main shell 41 is a square shell, two mutually parallel venturi tubes 42 are mounted on the main shell 41, a radial vent hole 421 is formed in the middle of each venturi tube 42, the vent holes 421 are distributed along the circumferential direction of the venturi tubes 42, a cross section is formed at the position of each vent hole 421 along the circumferential direction of each venturi tube 42, and the arc length formed by the vent holes 421 is 8/10-9/10 of the circumferential length of the vent holes 421; the length of the vent hole 421 along the axial direction of the Venturi tube 42 is 1/20-1/10 of the axial length of the Venturi tube 42.
One side of the main housing 41 is provided with two air inlets 411 respectively corresponding to one ends of the two venturi tubes 42, and the other side of the main housing 41 is provided with two mixed gas outlets respectively corresponding to the other ends of the two venturi tubes 42; the throttle valve 44 is disposed at the air inlet 411 of the main housing 41, the air inlet 411 is circular, the throttle valve 44 includes a rotating shaft 441 pivotally connected to the main housing 41, two circular valve plates 442 are fixed to the rotating shaft 441, each circular valve plate 442 corresponds to one air inlet 411, and the rotating shaft 441 drives the circular valve plates 442 to rotate to adjust the air inlet amount of the air inlet 411 of the main housing 41. One end of the rotating shaft 441 is further fixedly connected with a crank arm 443 which is convenient for driving the rotating shaft 441 to rotate.
The main housing 41 is provided with a mixture outlet at the other end corresponding to each venturi tube 42, and the mixture outlet is communicated with an intake manifold or an intake valve of the cylinder of the engine body 1.
The main shell 41 is fixedly connected with an auxiliary shell 45 in a sealing way, the main shell 41 is also provided with two nozzles 43, the outer surface of one end of each nozzle 43 is provided with an external thread, each nozzle 43 is locked on the main shell 41 by the external thread of one end, and the axial direction of each nozzle 43 is vertical to the axial direction of one venturi tube 42; the air inlet end of each nozzle 43 is communicated with the inner cavity of the auxiliary shell 45, the air outlet end of each nozzle 43 is communicated with a cavity surrounded by the inner wall of the main shell 41 and the outer wall of the Venturi tube 42, the air outlet end of each nozzle 43 corresponds to the air vent on one Venturi tube, a cylindrical through hole 431 is arranged in the middle of each nozzle 43, two ends of each cylindrical through hole 431 are provided with conical chamfers, and the conical chamfer of one end, close to the main shell 41, of each cylindrical through hole 431 of each nozzle 43 is larger than the conical chamfer of one end, close to the auxiliary shell 45.
An air inlet joint 46 is arranged on the auxiliary shell 45, one end of the air inlet joint 46 is communicated with the inner cavity of the auxiliary shell 45, and the other end of the air inlet joint 46 is connected with an air outlet of the pressure regulator 3 through a pipeline 5. Both the connecting pipeline 5 and the air inlet pipe 2 can adopt flexible pipelines for convenience.
A fuel control valve 6 is arranged between the air inlet pipe 2 and an air source, namely an air tank 11. The fuel control valve 6 opens or closes the communication of the intake pipe 2 with the gas source, i.e., the gas tank 11. Preferably, the fuel control valve 6 is an electromagnetic gate valve, and an ignition switch is mounted on the engine body 1, and the fuel control valve 6 is simultaneously opened when the ignition switch is ignited.
When the fuel control valve 6 is opened and liquefied petroleum gas passes through the air inlet pipe 2, the pressure of the air inlet of the pressure regulator 3 is 200-250 psi, namely the pressure of the air inlet of the pressure regulator 3 is 1.379-1.72375 Mpa; the pressure at the air outlet of the pressure regulator 3 is 1-5 psi, namely the pressure at the air outlet of the pressure regulator 3 is 0.006895-0.034475 MPa. Preferably, the pressure at the outlet of the pressure regulator 3 is 4 psi, i.e. the pressure at the outlet of the pressure regulator 3 is 0.02758 Mpa.
the embodiment can keep relatively stable power output, and is suitable for being used as power of equipment such as floor polishing machines, grinding machines, grass cutters and the like. In use, the emission of harmful substances such as carbon monoxide and hydrocarbon is greatly reduced, and the environment-friendly effect is better without the occurrence of sharp green smoke which can generate eye stabbing pain and suffocation feeling when the gasoline generator is used. Is also suitable for being used indoors for a long time.
The above is only a preferred embodiment of the present invention, and all changes that can be made by those skilled in the art according to the appended claims will fall within the scope of the present invention.
Claims (10)
1. An engine fueled with liquefied petroleum gas, comprising an engine block and a fuel supply system, characterized in that: the fuel supply system comprises an air inlet pipe, a pressure regulator and a carburetor assembly, wherein one end of the air inlet pipe is connected with an air source, and the other end of the air inlet pipe is connected with an air inlet of the pressure regulator;
The carburetor assembly comprises a main shell, a Venturi tube is arranged in the main shell, a radial air vent is formed in the middle of the Venturi tube, an air inlet is formed in one end, corresponding to the Venturi tube, of the main shell, a throttle valve is arranged at the air inlet of the main shell, a mixed gas outlet is formed in the other end, corresponding to the Venturi tube, of the main shell, and the mixed gas outlet is communicated with an air inlet manifold or an air inlet valve of an;
The main casing body is fixedly connected with an auxiliary casing body in a sealing mode, a nozzle is arranged on the main casing body, the air inlet end of the nozzle is communicated with the inner cavity of the auxiliary casing body, the air outlet end of the nozzle is communicated with a cavity formed by the inner wall of the main casing body and the outer wall of a Venturi tube in a surrounding mode, an air inlet joint is arranged on the auxiliary casing body, one end of the air inlet joint is communicated with the inner cavity of the auxiliary casing body.
2. an engine fueled by liquefied petroleum gas according to claim 1, wherein: the axial direction of the nozzle is mutually vertical to the axial direction of the Venturi tube, and the position of the air outlet end of the nozzle corresponds to the vent hole.
3. an engine fueled by liquefied petroleum gas according to claim 1, wherein: the engine body is four-stroke engine, the main casing body is square casing, is equipped with two venturi and two nozzles that are parallel to each other on the main casing body, the axial of every nozzle and venturi's axial mutually perpendicular, and the position that every nozzle was given vent to anger the end corresponds on a venturi the air vent, one side of the main casing body are equipped with two air inlet and correspond two venturi's one end respectively, and the opposite side of the main casing body is equipped with two gas mixture exports and corresponds two venturi's the other end respectively.
4. An engine fueled by liquefied petroleum gas according to claim 3, wherein: the air inlet that the main casing body corresponds every venturi one end is circular form, throttle valve includes a pivot of pin joint on the main casing body, fixes two circular valve plates in the pivot, and every circular valve plate corresponds an air inlet, drives circular valve plate through the pivot and rotates the air admission volume of adjusting main casing body air inlet.
5. An engine fueled by liquefied petroleum gas according to claim 1, wherein: the vent holes are distributed along the circumferential direction of the Venturi tube, cross sections are formed at the positions of the vent holes along the circumferential direction of the Venturi tube, and the arc length formed by the vent holes is 8/10-9/10 of the circumferential length of the vent holes; the axial length of the vent hole along the Venturi tube is 1/20-1/10 of the axial length of the Venturi tube.
6. An engine fueled by liquefied petroleum gas according to claim 1, wherein: and a fuel control valve is arranged between the air inlet pipe and the air source and opens or closes the communication between the air inlet pipe and the air source.
7. An engine fueled by liquefied petroleum gas according to claim 6, wherein: the fuel control valve is an electromagnetic gate valve, an ignition switch is arranged on the engine body, and the fuel control valve is opened simultaneously when the ignition switch is ignited.
8. an engine fueled by liquefied petroleum gas according to claim 1, wherein: the liquefied petroleum gas is propane or butane or natural gas.
9. An engine fueled with liquefied petroleum gas according to any one of claims 1 to 8, wherein: when the liquefied petroleum gas passes through the air inlet pipe, the pressure of the air inlet of the pressure regulator is 200-250 psi, and the pressure of the air outlet of the pressure regulator is 1-5 psi.
10. an engine fueled by liquefied petroleum gas according to claim 9, wherein: the pressure at the outlet of the pressure regulator was 4 psi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504333.6U CN209743077U (en) | 2019-04-15 | 2019-04-15 | Engine using liquefied petroleum gas as fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504333.6U CN209743077U (en) | 2019-04-15 | 2019-04-15 | Engine using liquefied petroleum gas as fuel |
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| CN209743077U true CN209743077U (en) | 2019-12-06 |
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| CN201920504333.6U Active CN209743077U (en) | 2019-04-15 | 2019-04-15 | Engine using liquefied petroleum gas as fuel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508448A (en) * | 2020-11-17 | 2022-05-17 | 华益机电有限公司 | Double-fuel gas supply system with stepping motor |
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2019
- 2019-04-15 CN CN201920504333.6U patent/CN209743077U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508448A (en) * | 2020-11-17 | 2022-05-17 | 华益机电有限公司 | Double-fuel gas supply system with stepping motor |
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