CN107725218B - Automatic air door carburetor of gasoline engine - Google Patents
Automatic air door carburetor of gasoline engine Download PDFInfo
- Publication number
- CN107725218B CN107725218B CN201711090635.5A CN201711090635A CN107725218B CN 107725218 B CN107725218 B CN 107725218B CN 201711090635 A CN201711090635 A CN 201711090635A CN 107725218 B CN107725218 B CN 107725218B
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- China
- Prior art keywords
- air door
- carburetor
- gasoline engine
- rocker arm
- main air
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- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
- F02M1/08—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
The invention belongs to the technical field of engines, and relates to an automatic air door carburetor of a gasoline engine, which comprises a carburetor, wherein a driving arm is connected to a rotating shaft which is heated and rotated by a thermal switch controlled by the body heat of the gasoline engine, and drives a rocker arm on a main shaft for controlling the opening of a main air door of the carburetor to rotate through a pushing rod so as to control the opening of the main air door, and a control rod of an air pump controlled by negative pressure in an air inlet pipe of the gasoline engine drives the rocker arm on the main shaft for controlling the opening of the main air door of the carburetor to rotate so as to control the opening of the main air door; the rocker arm is provided with an arc hole concentric with the main shaft, the outside driving end of the push rod is positioned at the front end of the arc hole before the cold engine starts and when the main air door is closed, the rocker arm is arranged on a gasoline engine, the main air door can be automatically opened or closed according to the specified time no matter the cold engine starts or the heat engine starts, the opening of the air door is not manually interfered, the starting action is simple, the starting success rate is high, and one-key starting can be realized.
Description
Technical Field
The invention belongs to the technical field of engines, in particular to an automatic air door carburetor of a gasoline engine.
Background
At present, when a small-sized petrol engine for a unit or household is started in a cold state, a main air door is manually closed, and after the engine is started and catches fire, the main air door is manually opened, so that the engine works normally; when the heat engine is started, the main air door is manually opened first and then is operated and started, so that the repeated operation of the main air door brings inconvenience to a user, and the control is poor, so that the starting failure is caused.
Disclosure of Invention
The invention aims to provide an automatic air door carburetor of a gasoline engine.
The purpose of the invention is realized in the following way:
an automatic throttle carburetor of a gasoline engine comprises a carburetor, wherein a driving arm is connected to a rotating shaft which is heated and rotated by a thermal switch controlled by the body heat of the gasoline engine, the driving arm drives a rocker arm on a main shaft for controlling the opening of a main throttle of the carburetor to rotate through a push rod so as to control the opening of the main throttle, and a control rod of an air pump controlled by negative pressure in an air inlet pipe of the gasoline engine drives the rocker arm on the main shaft for controlling the opening of the main throttle of the carburetor to rotate so as to control the opening of the main throttle; the rocker arm is provided with an arc hole concentric with the main shaft, the thermal switch does not work, and when the main air door is closed, the outer driving end of the push rod is positioned at the front end of the arc hole; the thermal switch does not work and when the main air door is fully opened, the outside driving end of the push rod is positioned at the rear end of the arc-shaped hole.
The specific structure of the air pump is as follows: the middle part in the closed shell is provided with a film driven to move by negative pressure, the film divides the inner cavity of the shell into a pressure sensing cavity on one side and a control cavity on the other side, a conduit connector or a conduit which can be communicated with an air inlet pipe of the gasoline engine is arranged on the pressure sensing cavity, a control rod fixed on the film in the control cavity extends out of the shell, and the control cavity is communicated with the atmosphere through a vent hole on the side wall.
The specific structure of the air pump is as follows: the inside of the closed shell is provided with a piston driven to move by negative pressure, the piston divides the inner cavity of the shell into a pressure sensing cavity on one side and a control cavity on the other side, a conduit connector or a conduit which can be communicated with an air inlet pipe of the gasoline engine is arranged on the pressure sensing cavity, a control rod fixed on the piston in the control cavity extends out of the shell, and the control cavity is communicated with the atmosphere through a vent hole on the side wall.
The rocker arm has the following specific structure: one end of the rocker arm is fixed on a main shaft for controlling the opening degree of a main air door of the carburetor, the other end of the rocker arm is hinged with a control rod of the air pump, the upper end of a vertical arm which extends upwards simultaneously at the other end of the rocker arm is transversely extended to form an arc-shaped plate, the arc-shaped hole is formed in the arc-shaped plate, when the main air door is closed and started by a cold machine, the driving end on the outer side of the push rod is positioned at the front end of the arc-shaped hole, and when the main air door is fully opened and started by the cold machine, the driving end on the outer side of the push rod is positioned at the rear end of the arc-shaped hole.
The main shaft for controlling the opening degree of the main air door of the carburetor extends out of the shell and is fixedly connected with one end of the rocker arm at the end part, and the spring for promoting the main shaft to rotate in the closing direction of the main air door is sleeved on the main shaft between the shell and the rocker arm.
The push rod extends outwards at the lower end of one side wall of the inverted U-shaped rod and is hinged with the outer end of the driving arm, and the lower end of the other side wall is inserted into the arc-shaped hole.
The shell of the thermosensitive switch is provided with a limiting block or a limiting pin for limiting the maximum and minimum rotation positions of the driving arm.
Drawings
Fig. 1 is a schematic perspective view of the present invention after being mounted on a gasoline engine.
Fig. 2 is a schematic perspective view of the present invention.
Fig. 3 is a schematic view of one of the air pump structures of the present invention.
FIG. 4 is a schematic diagram of a second air pump structure of the present invention.
Fig. 5 is an enlarged partial view of the thermally sensitive switch section of fig. 2.
Fig. 6 is an enlarged view of a portion a in fig. 2.
Detailed Description
The invention is further described in the following embodiments with reference to the figures, see fig. 1-6:
an automatic throttle carburetor of a gasoline engine comprises a carburetor 10, a rotating shaft 52 which is heated and rotated by a thermal switch 50 controlled by the heat of the gasoline engine is connected with a driving arm 54, the driving arm 54 drives a rocker arm 12 on a main shaft 13 which controls the opening of a main throttle 11 of the carburetor 10 to rotate through a push rod 40 so as to control the opening of the main throttle 11, and a control rod 21 of an air pump 20 which is controlled by the negative pressure in an air inlet pipe 30 of the gasoline engine drives the rocker arm 12 on the main shaft 13 which controls the opening of the main throttle 11 of the carburetor 10 to rotate so as to control the opening of the main throttle 11; the rocker arm 12 is provided with an arc hole 17 concentric with the main shaft 13, the thermal switch 50 does not work, and when the main air door 11 is closed, the outer driving end 42 of the push rod 40 is positioned at the front end of the arc hole 17; the thermal switch 50 is deactivated and the outboard drive end 42 of the push rod 40 is located at the rear end of the arcuate aperture 17 when the main damper is fully open.
The specific structure of the air pump 20 is as follows: the middle part in the closed shell 23 is provided with a film 25 driven to move by negative pressure, the film 25 divides the inner cavity of the shell into a pressure sensing cavity 26 on one side and a control cavity 24 on the other side, the pressure sensing cavity 26 is provided with a conduit joint or conduit 31 which can be communicated with an air inlet pipe 30 of the gasoline engine, a control rod 21 fixed on the film 25 in the control cavity 24 extends out of the shell 23, and the control cavity 24 is communicated with the atmosphere through a vent hole 22 on the side wall.
The specific structure of the air pump 20 is as follows: the closed shell 28 is internally provided with a piston 27 driven to move by negative pressure, the piston 27 divides the inner cavity of the shell 28 into a pressure sensing cavity 26 on one side and a control cavity 24 on the other side, a conduit connector or conduit 31 which can be communicated with an air inlet pipe 30 of the gasoline engine is arranged on the pressure sensing cavity 26, a control rod 21 fixed on the piston 27 in the control cavity 24 extends out of the shell, and the control cavity 24 is communicated with the atmosphere through a vent hole 22 on the side wall.
The specific structure of the rocker arm 12 is as follows: one end of the rocker arm 12 is fixed on a main shaft 13 for controlling the opening degree of a main air door of the carburetor 10, the other end of the rocker arm 12 is hinged with a control rod 21 of the air pump 20, the upper end of a vertical arm 15 which extends upwards at the same time is transversely extended with an arc plate 16, the arc plate 16 is provided with an arc hole 17, when the main air door 11 is closed before the cold machine is started, the outer driving end 42 of a push rod 40 is positioned at the front end of the arc hole 17, when the cold machine is started and the main air door 11 is fully opened, the outer driving end 42 of the push rod 40 is positioned at the rear end of the arc hole 17, so that in the state that the cold machine is started and the heat-sensitive switch is not operated, the driving end 42 of the push rod 40 is not rotated relative to the driving end 42 in the arc hole 17 until the main air door 11 is fully opened, the air pump is not interfered with the rotation of the main air door 11, and as the whole temperature of the engine is increased, the heat-sensitive switch drives the driving end 42 of the push rod 40 to slide in the arc hole 17 until the main air door is fully opened, and the heat-sensitive switch is controlled to be positioned at the full open position when the engine is started.
The main shaft 13 controlling the opening of the main air door 11 of the carburetor 10 extends out of the shell and is fixedly connected with one end of the rocker arm 12 at the end, and a spring 14 for urging the main shaft 13 to rotate towards the closing direction of the main air door 11 is sleeved on the main shaft 13 between the shell and the rocker arm 12.
The push rod 40 extends out of the transverse part 43 at the lower end of one side wall 41 of the inverted U-shaped rod, and is hinged with the outer end of the driving arm 54 through the right-angle bending part of the transverse part 43, and the lower end (driving end 42) of the other side wall is inserted into the arc-shaped hole 17.
The casing of the thermal switch 50 is provided with limiting blocks or limiting pins 51 and 53 for limiting the maximum and minimum rotation positions of the driving arm 54, and the driving arm 54 is fixed on the rotating shaft 52 of the thermal switch 50.
The invention has the following working and beneficial technical effects:
when the cold engine of the gasoline engine is started, the main air door is in a closed state, the oil tank switch on the control panel is placed in an open position, after the one-key start/flameout switch is pressed, the gasoline engine is started to catch fire, the control rod of the air pump is automatically sucked through the negative pressure of the air inlet pipe to move so as to drive the rocker arm on the main shaft for controlling the opening of the main air door of the carburetor to rotate, so that the main air door is opened, and the gasoline engine works normally; after the one-key start/flameout switch is pressed again, the gasoline engine is flameout; when the heat engine of the gasoline engine is started, the heat sensitive switch drives the push rod and the main air door of the control carburetor to be in an open position through the driving arm on the rotating shaft after being heated, and the engine can be directly started by pressing the one-key start/flameout switch; when the gasoline engine is flameout, the pressure in the air pump pressure sensing cavity is equal to the pressure in the control cavity, no acting force is applied to the main air door, the thermosensitive switch drives the push rod to gradually close the main air door of the carburetor through the driving arm on the rotating shaft along with the reduction of temperature, and the main air door is closed until the push rod is closed under the action of the reset spring, so that the driving end 42 on the outer side of the push rod 40 is positioned at the front end of the arc-shaped hole 17. Therefore, whether the engine is started by a cold engine or a heat engine, the main air door can be automatically opened or closed according to the specified time, the opening degree of the main air door is not manually interfered, the starting action is simple, the success rate of starting is high, and one-key starting of the engine can be realized.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (6)
1. The automatic air door carburetor of the petrol engine comprises a carburetor, and is characterized in that: a driving arm is connected to a rotating shaft which is heated and rotated by a thermal switch controlled by the body heat of the gasoline engine, and drives a rocker arm on a main shaft for controlling the opening of a main air door of the carburetor to rotate through a push rod so as to control the opening of the main air door, and a control rod of an air pump controlled by negative pressure in an air inlet pipe of the gasoline engine drives the rocker arm on the main shaft for controlling the opening of the main air door of the carburetor to rotate so as to control the opening of the main air door; the rocker arm is provided with an arc hole concentric with the main shaft, the thermal switch does not work, and when the main air door is closed, the outer driving end of the push rod is positioned at the front end of the arc hole; the thermal switch does not work, and when the main air door is fully opened, the outer driving end of the push rod is positioned at the rear end of the arc-shaped hole; the rocker arm has the specific structure that: one end of the rocker arm is fixed on a main shaft for controlling the opening degree of a main air door of the carburetor, the other end of the rocker arm is hinged with a control rod of the air pump, the upper end of a vertical arm which extends upwards simultaneously at the other end of the rocker arm is transversely extended to form an arc-shaped plate, the arc-shaped hole is formed in the arc-shaped plate, when the main air door is closed and started by a cold machine, the driving end on the outer side of the push rod is positioned at the front end of the arc-shaped hole, and when the main air door is fully opened and started by the cold machine, the driving end on the outer side of the push rod is positioned at the rear end of the arc-shaped hole.
2. The automatic throttle carburetor of a gasoline engine of claim 1, wherein: the specific structure of the air pump is as follows: the middle part in the closed shell is provided with a film driven to move by negative pressure, the film divides the inner cavity of the shell into a pressure sensing cavity on one side and a control cavity on the other side, a conduit connector or a conduit which can be communicated with an air inlet pipe of the gasoline engine is arranged on the pressure sensing cavity, a control rod fixed on the film in the control cavity extends out of the shell, and the control cavity is communicated with the atmosphere through a vent hole on the side wall.
3. The automatic throttle carburetor of a gasoline engine of claim 1, wherein: the specific structure of the air pump is as follows: the inside of the closed shell is provided with a piston driven to move by negative pressure, the piston divides the inner cavity of the shell into a pressure sensing cavity on one side and a control cavity on the other side, a conduit connector or a conduit which can be communicated with an air inlet pipe of the gasoline engine is arranged on the pressure sensing cavity, a control rod fixed on the piston in the control cavity extends out of the shell, and the control cavity is communicated with the atmosphere through a vent hole on the side wall.
4. The automatic throttle carburetor of a gasoline engine of claim 1, wherein: the main shaft controlling the opening degree of the main air door of the carburetor extends out of the shell and is fixedly connected with one end of the rocker arm at the end part, and a spring which drives the main shaft to rotate in the closing direction of the main air door is sleeved on the main shaft between the shell and the rocker arm.
5. An automatic throttle carburetor for a gasoline engine according to any one of claims 1-4, wherein: the push rod extends outwards at the lower end of one side wall of the inverted U-shaped rod and is hinged with the outer end of the driving arm, and the lower end of the other side wall is inserted into the arc-shaped hole.
6. An automatic throttle carburetor for a gasoline engine according to any one of claims 1-4, wherein: the shell of the thermal switch is provided with a limiting block or a limiting pin for limiting the maximum and minimum rotation positions of the driving arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711090635.5A CN107725218B (en) | 2017-11-08 | 2017-11-08 | Automatic air door carburetor of gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711090635.5A CN107725218B (en) | 2017-11-08 | 2017-11-08 | Automatic air door carburetor of gasoline engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107725218A CN107725218A (en) | 2018-02-23 |
| CN107725218B true CN107725218B (en) | 2023-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711090635.5A Active CN107725218B (en) | 2017-11-08 | 2017-11-08 | Automatic air door carburetor of gasoline engine |
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| Country | Link |
|---|---|
| CN (1) | CN107725218B (en) |
Citations (10)
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|---|---|---|---|---|
| JPH09126054A (en) * | 1995-10-30 | 1997-05-13 | Suzuki Motor Corp | Control device of choke valve |
| CN2929214Y (en) * | 2006-05-10 | 2007-08-01 | 吴银豹 | Automatic air door mechanism for four stroke internal combustion engine |
| CN201096025Y (en) * | 2007-11-15 | 2008-08-06 | 牟利民 | Engine fuel automatic supplier |
| CN101624946A (en) * | 2009-07-24 | 2010-01-13 | 隆鑫工业有限公司 | Automatic control mechanism of carbureter air choke valve of general gasoline motor |
| CN204239090U (en) * | 2014-09-15 | 2015-04-01 | 冯政杰 | A kind of motor self closing door mechanism |
| CN104564426A (en) * | 2015-01-26 | 2015-04-29 | 重庆大江动力设备制造有限公司 | Automatic control mechanism for choke valve of engine carburetor |
| CN106014692A (en) * | 2016-07-21 | 2016-10-12 | 福建省福林化油器有限公司 | Automatic chock valve control device of carburetor |
| CN205805759U (en) * | 2016-07-21 | 2016-12-14 | 福建省福林化油器有限公司 | A kind of carburetor automatically control choke |
| CN206129438U (en) * | 2016-09-02 | 2017-04-26 | 华益机电有限公司 | Fuel supply system and automatic choke device thereof |
| CN207348980U (en) * | 2017-11-08 | 2018-05-11 | 绿田机械股份有限公司 | The self closing door carburetor of petrol engine |
-
2017
- 2017-11-08 CN CN201711090635.5A patent/CN107725218B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09126054A (en) * | 1995-10-30 | 1997-05-13 | Suzuki Motor Corp | Control device of choke valve |
| CN2929214Y (en) * | 2006-05-10 | 2007-08-01 | 吴银豹 | Automatic air door mechanism for four stroke internal combustion engine |
| CN201096025Y (en) * | 2007-11-15 | 2008-08-06 | 牟利民 | Engine fuel automatic supplier |
| CN101624946A (en) * | 2009-07-24 | 2010-01-13 | 隆鑫工业有限公司 | Automatic control mechanism of carbureter air choke valve of general gasoline motor |
| CN204239090U (en) * | 2014-09-15 | 2015-04-01 | 冯政杰 | A kind of motor self closing door mechanism |
| CN104564426A (en) * | 2015-01-26 | 2015-04-29 | 重庆大江动力设备制造有限公司 | Automatic control mechanism for choke valve of engine carburetor |
| CN106014692A (en) * | 2016-07-21 | 2016-10-12 | 福建省福林化油器有限公司 | Automatic chock valve control device of carburetor |
| CN205805759U (en) * | 2016-07-21 | 2016-12-14 | 福建省福林化油器有限公司 | A kind of carburetor automatically control choke |
| CN206129438U (en) * | 2016-09-02 | 2017-04-26 | 华益机电有限公司 | Fuel supply system and automatic choke device thereof |
| CN207348980U (en) * | 2017-11-08 | 2018-05-11 | 绿田机械股份有限公司 | The self closing door carburetor of petrol engine |
Non-Patent Citations (1)
| Title |
|---|
| 化油器中的启动系统;郭永华;;摩托车信息(02);第36页 * |
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| Publication number | Publication date |
|---|---|
| CN107725218A (en) | 2018-02-23 |
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Inventor after: Luo Changguo Inventor before: Luo Changguo Inventor before: Cai Yongjun |
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