CN210033662U

CN210033662U - Gasifier rich oil simple starting device and engine starting system thereof

Info

Publication number: CN210033662U
Application number: CN201920581914.XU
Authority: CN
Inventors: 薛美英; 贾永成
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-25
Filing date: 2019-04-25
Publication date: 2020-02-07
Anticipated expiration: 2029-04-25

Abstract

The utility model relates to a carburetor technical field especially relates to a gasifier rich oil simple and easy starting device, engine starting system and starting method thereof. A simple oil-rich starting device for a gasifier comprises a body and an oil cup, wherein the oil cup is arranged on the body, an oil pumping diaphragm is arranged in the body, a mixing chamber, a metering chamber and a fuel oil cavity are formed in the body, and the fuel oil cavity is divided into a pump oil cavity and an oil-rich cavity by the oil pumping diaphragm; an oil inlet channel, a fuel oil channel, a starting channel and an oil return channel are also formed in the body; the oil pumping cavity is communicated with the inside of the oil cup, and the oil rich cavity is communicated with the inside of the oil cup through the fuel oil channel; one end of the oil inlet channel is communicated with the oil-rich cavity, and the other end of the oil inlet channel is communicated with the metering chamber; one end of the starting channel is communicated with the oil-rich cavity, and the other end of the starting channel is communicated with the mixing chamber; one end of the oil return channel is communicated with the inside of the oil cup, and the other end of the oil return channel is connected with the oil tank.

Description

Gasifier rich oil simple starting device and engine starting system thereof

Technical Field

The utility model relates to a carburetor technical field especially relates to a gasifier rich oil simple and easy starting device and engine starting system thereof.

Background

The engine is under the warm-up state, and the match is 13 ~ 15 at economic air-fuel ratio according to setting when leaving the factory: 1, but when the engine is started in a cold engine, the engine needs 6-12: an air-fuel ratio of 1, i.e., at the time of cold start, requires a higher fuel. The existing choke valve device is commonly adopted, and the air inlet quantity is reduced by closing the choke valve so as to obtain higher fuel-oil ratio for starting. Further, the engine starter is pulled by hand until POP sound (POP sound) is heard. The choke valve device is complex in structure, complicated in starting steps, difficult to judge POP sound (POP sound), and easy to cause the engine to submerge a cylinder and be difficult to start; at the same time, the engine is difficult or impossible to start at low temperatures.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a gasifier rich oil simple start-up device that is easy to operate and start up.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

a simple oil-rich starting device for a gasifier comprises a body and an oil cup, wherein the oil cup is arranged on the body, an oil pumping diaphragm is arranged in the body, a mixing chamber, a metering chamber and a fuel oil cavity are formed in the body, and the fuel oil cavity is divided into a pump oil cavity and an oil-rich cavity by the oil pumping diaphragm; an oil inlet channel, a fuel oil channel, a starting channel and an oil return channel are also formed in the body;

the oil pumping cavity is communicated with the inside of the oil cup, and the oil rich cavity is communicated with the inside of the oil cup through the fuel oil channel; one end of the oil inlet channel is communicated with the oil-rich cavity, and the other end of the oil inlet channel is communicated with the metering chamber; one end of the starting channel is communicated with the oil-rich cavity, and the other end of the starting channel is communicated with the mixing chamber; one end of the oil return channel is communicated with the inside of the oil cup, and the other end of the oil return channel is connected with the oil tank.

In the application, the oil cup is arranged, and the oil inlet channel, the fuel oil channel, the starting channel and the oil return channel are arranged in the body; pressing the oil cup, enabling fuel oil in the metering chamber to enter the oil-rich cavity through the oil inlet channel, enabling part of the fuel oil in the oil-rich cavity to enter the oil cup through the fuel oil channel, and enabling part of the fuel oil in the oil cup to enter the oil tank through the oil return channel; meanwhile, under the action of the oil cup, part of fuel oil in the oil-rich cavity is injected into the mixing chamber through the starting channel in advance so as to be used for starting the engine. It will be appreciated from the above description that the metering chamber-inlet passage-enrichment chamber-fuel passage-cup-return passage constitute an air/fuel purge passage for purging excess air from the body; the metering chamber, the oil inlet channel, the oil-rich cavity, the starting channel and the mixing chamber form a pre-oil injection channel, the oil cup is pressed, fuel oil is pre-injected into the mixing chamber while redundant air in the body is removed, and further the air-fuel ratio required by starting the engine is improved, so that the engine can be quickly started.

In one embodiment, a first check valve is installed in the oil inlet passage and is used for preventing the fuel in the oil-rich cavity from flowing into the metering chamber.

In one embodiment, a second check valve is installed in the starting passage and prevents fuel or air in the mixing chamber from entering the rich chamber.

In one embodiment, a duckbill valve is arranged on the oil return channel, the fuel channel and the oil return channel are isolated through the duckbill valve, and fuel in the oil cup is discharged into an oil tank through the duckbill valve and the oil return channel.

In one embodiment, a pump force transmission channel is further formed in the body, one end of the pump force transmission channel is communicated with the inside of the oil cup, the other end of the pump force transmission channel is communicated with the pump oil cavity, and pressure generated by pressing the oil cup is transmitted into the pump oil cavity through the pump force transmission channel to drive the pump oil diaphragm to move.

In one embodiment, the body is further provided with a pressure balance channel, one end of the pressure balance channel is communicated with the starting channel, and the other end of the pressure balance channel is communicated with the atmosphere.

The pressure balance channel is arranged, so that fuel oil in the oil-rich cavity can be prevented from being sucked out by negative pressure generated when the engine works normally.

In one embodiment, a choke valve is arranged on the body and used for controlling the proportion of air entering the mixing chamber.

In one embodiment, a third check valve is disposed on the fuel passage and is used for preventing the fuel or air in the oil cup or the fuel passage from flowing into the rich chamber.

In one embodiment, the body includes a main body and a cover, the oil pumping membrane is disposed between the main body and the cover, the cover is covered on the main body, the oil cup is mounted on the cover, the oil inlet channel and the starting channel are disposed on the main body, and the oil return channel is disposed on the cover.

The utility model discloses still provide following technical scheme:

the engine starting system comprises an engine and a gasifier oil-rich simple starting device, wherein the gasifier oil-rich simple starting device is connected with the engine, and the gasifier oil-rich simple starting device adopts the gasifier oil-rich simple starting device.

In the present application, the engine is started conveniently and easily by providing the vaporizer rich oil simple starting device.

Compared with the prior art, the gasifier rich oil simple starting device is characterized in that an oil cup is arranged, and an oil inlet channel, a fuel oil channel, a starting channel and an oil return channel are arranged in a body; pressing the oil cup, enabling fuel oil in the metering chamber to enter the oil-rich cavity through the oil inlet channel, enabling part of the fuel oil in the oil-rich cavity to enter the oil cup through the fuel oil channel, and enabling part of the fuel oil in the oil cup to enter the oil tank through the oil return channel; meanwhile, under the action of the oil cup, part of fuel oil in the oil-rich cavity is injected into the mixing chamber through the starting channel in advance so as to be used for starting the engine. It will be appreciated from the above description that the metering chamber-inlet passage-enrichment chamber-fuel passage-cup-return passage constitute an air/fuel purge passage for purging excess air from the body; the metering chamber, the oil inlet channel, the oil-rich cavity, the starting channel and the mixing chamber form a pre-oil injection channel, the oil cup is pressed, fuel oil is pre-injected into the mixing chamber while redundant air in the body is removed, and further the air-fuel ratio required by starting the engine is improved, so that the engine can be quickly started.

Drawings

FIG. 1 is a block schematic diagram of an engine starting system provided by the present invention;

fig. 2 is a schematic structural diagram of the simple gasifier rich oil starting device provided by the present invention;

fig. 3 is a partial exploded view of the gasifier rich oil simple starting device provided by the present invention;

fig. 4 is a top view of the gasifier rich oil simple start device provided by the present invention;

fig. 5 is a bottom view of the simple oil-rich starting device of the gasifier provided by the present invention;

fig. 6 is a top view of the main body provided by the present invention;

fig. 7 is a cross-sectional view taken at a-a of fig. 2 according to the present invention;

fig. 8 is a cross-sectional view taken at B-B of fig. 4 in accordance with the present invention;

fig. 9 is a cross-sectional view at C-C of fig. 4 in accordance with the present invention;

fig. 10 is a cross-sectional view taken at D-D of fig. 4 in accordance with the present invention;

fig. 11 is a cross-sectional view taken at E-E of fig. 5 in accordance with the present invention;

fig. 12 is a cross-sectional view at F-F of fig. 6 in accordance with the present invention;

fig. 13 is a perspective view of the cover body provided by the present invention;

fig. 14 is a partial cross-sectional view of the cover at a viewing angle in accordance with the present invention;

fig. 15 is a partial cross-sectional view of the cover at another perspective provided by the present invention;

fig. 16 is a partial cross-sectional view of the main body provided by the present invention at a viewing angle;

fig. 17 is a partial cross-sectional view of the main body provided by the present invention from another perspective;

fig. 18 is a partial cross-sectional view of another perspective of the body provided by the present invention.

In the figure, the gasifier oil-rich simple starting device 100, a body 10, an oil pumping diaphragm 11, a mixing chamber 12, a metering chamber 13, a fuel oil chamber 14, a pumping oil chamber 14a, an oil-rich chamber 14b, an oil inlet channel 15, a first check valve 151, a fuel oil channel 16, a third check valve 161, a starting channel 17, a second check valve 171, a cone 171a, an oil return channel 18, a duckbill valve 181, a main valve portion 181a, an umbrella-shaped portion 181b, a pumping force transmission channel 19, an oil cup 20, a cover body 30, an oil return pipe 31, a cover plate 32, a first chamber 33, a pulse fuel oil chamber 34, a main body 40, a second chamber 41, a pulse pump chamber 42, an oil inlet pipe 43, a filter screen 44, a pressure balance channel 45, a check member 46, an engine starting system 200, an engine 201, an oil tank 202 and.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection 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 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 in the description of the invention herein 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.

As shown in fig. 1, the utility model provides an engine starting system 200, engine starting system 200 is mainly used in outdoor garden instrument on, outdoor garden instrument can be grass cutter, lawn mower, felling machine etc.. Because outdoor garden tools are small in displacement and hand-held, most are manually started. Of course, in other embodiments, the engine starting system 200 may be used on other devices or machines that are not hand-held.

The engine starting system 200 includes an engine 201 and a vaporizer rich simple start device 100, the vaporizer rich simple start device 100 is connected to the engine 201, and the vaporizer rich simple start device 100 is used for supplying required fuel for starting the engine 201 before the engine 201 is started, so as to reduce the number of times of starting the engine 201 and improve the starting efficiency. In particular, the engine 201 is started more easily in a low-temperature environmental state. Here, the low temperature environment refers to the engine 201 being in a starting environment or an operating environment when the ambient air temperature is-15 ℃ to 5 ℃ or lower.

Specifically, the gasifier rich simplified start-up device 100 can be applied to a rotary valve type gasifier or a butterfly valve type gasifier. Of course, the gasifier rich start-up device 100 can be adapted to both rotary valve type gasifiers and butterfly valve type gasifiers, and the oil path and the operation principle of the gasifier rich start-up device 100 are basically the same, and the difference may be only the position of the oil path. In the present embodiment, the structure and the operation principle of the gasifier rich start-up device 100 will be specifically described by taking the butterfly valve type gasifier as an example and an object of explanation.

As shown in fig. 2 to 12, the gasifier rich oil simple starting device 100 includes a body 10 and an oil cup 20, the oil cup 20 is disposed on the body 10, an oil pumping diaphragm 11 is disposed in the body 10, a mixing chamber 12, a metering chamber 13 and a fuel oil chamber 14 are disposed in the body 10, and the oil pumping diaphragm 11 partitions the fuel oil chamber 14 to form a oil pumping chamber 14a and a rich oil chamber 14 b; the mixing chamber 12 communicates with an intake manifold of the engine 201 so that fuel in the mixing chamber 12 can enter the intake manifold and be used for starting the engine 201, the metering chamber 13 is used for metering the fuel amount, and the metering chamber 13 is communicated with a fuel tank 202 through an oil path.

Of course, in addition to the body 10 and the oil cup 20 mentioned above, the gasifier oil-rich simplified start-up device 100 further includes a throttle assembly (not labeled), a choke assembly (not labeled), and a linkage assembly (not labeled), which cooperate together to achieve the overall function of the gasifier oil-rich simplified start-up device 100. It is understood that in the present embodiment, the components such as the throttle assembly, the choke assembly, and the linkage assembly are not the main points of the present embodiment, and are not described herein again.

Further, referring to fig. 13-18, an oil inlet passage 15, a fuel oil passage 16, a starting passage 17, and an oil return passage 18 are further formed in the body 10; the pumping chamber 14a communicates with the inside of the oil cup 20, and the rich chamber 14b communicates with the inside of the oil cup 20 through the fuel passage 16; one end of the oil inlet channel 15 is communicated with the oil-rich chamber 14b, and the other end is communicated with the metering chamber 13; one end of the start channel 17 is communicated with the oil-rich chamber 14b, and the other end is communicated with the mixing chamber 12; one end of the oil return passage 18 communicates with the inside of the oil cup 20, and the other end is connected to an oil tank 202.

Pressing the oil cup 20, enabling the fuel in the oil tank 202 to enter the metering chamber 13 through a through pipeline, enabling the fuel in the metering chamber 13 to enter the oil-rich chamber 14b through the oil inlet channel 15, enabling part of the fuel in the oil-rich chamber 14b to enter the oil cup 20 through the fuel channel 16, and enabling part of the fuel in the oil cup 20 to enter the oil tank through the oil return channel 18; meanwhile, under the action of the oil cup 20, part of the fuel in the rich oil chamber 14b is injected into the mixing chamber 12 through the starting channel 17 in advance for starting the engine 201.

It will be understood from the above description that the metering chamber 13, the oil inlet passage 15, the oil-rich chamber 14b, the fuel passage 16, the oil cup 20, and the oil return passage 18 constitute an air/fuel purge passage, and excess air/fuel in the body 10 (passages and chambers) is purged through the air/fuel purge passage; the metering chamber 13, the oil inlet passage 15, the oil-rich chamber 14b, the starting passage 17, and the mixing chamber 12 constitute a preliminary fuel injection passage, and the engine 201 is preliminarily supplied with starting fuel through the preliminary fuel injection passage. The oil cup 20 is pressed, so that when redundant air/fuel oil in the body 10 is removed, part of the fuel oil is pre-injected into the mixing chamber 12, the concentration of the required mixed gas is further improved when the engine 201 is started, and the engine 201 can be quickly started.

Further, referring to fig. 8 to 10, a pump force conducting channel 19 is further formed on the body 10, one end of the pump force conducting channel 19 is communicated with the inside of the oil cup 20, the other end of the pump force conducting channel is communicated with the pump oil chamber 14a, and the oil cup 20, the pump force conducting channel 19, the pump oil chamber 14a and the pump oil diaphragm 11 form a pump, so that pressure (pump force) generated by pressing the oil cup 20 is transmitted to the pump oil chamber 14a through the pump force conducting channel 19 to drive the pump oil diaphragm 11 to act to pump oil.

Referring to fig. 11, a first check valve 151 is installed in the oil inlet passage 15, and the first check valve 151 is configured to prevent the fuel in the oil-rich chamber 14b from flowing back to the metering chamber 13. It is understood that the first check valve 151 is in one-way communication, that is, only allows the metering chamber 13 to enter the rich oil chamber 14b, but does not allow the fuel in the rich oil chamber 14b to flow into the metering chamber 13. Of course, in other embodiments, structures other than the first check valve 151 may be employed as long as the fuel in the rich oil chamber 14b is prevented from flowing into the metering chamber 13 and the fuel in the metering chamber 13 is allowed to enter the rich oil chamber 14 b.

Preferably, the first check valve 151 is a check valve with or without a spring. In the present embodiment, the first check valve 151 is a check valve without a spring.

As shown in fig. 6, a third check valve 161 is disposed on the fuel passage 16, and the third check valve 161 is used for preventing the fuel and air in the oil cup 20 or the fuel passage 16 from flowing backwards into the rich chamber 14 b.

As shown in fig. 11 and 17, a second check valve 171 is installed in the starting passage 17, and the second check valve 171 is installed in a direction opposite to the installation direction of the first check valve 151. The second check valve 171 prevents the fuel or air in the mixing chamber 12 from flowing backward into the oil-rich chamber 14 b. It is understood that the second check valve 171 is in one-way communication, that is, allows only the rich chamber 14b to enter the mixing chamber 12, but does not allow the fuel and air in the mixing chamber 12 to flow into the rich chamber 14 b. Of course, in other embodiments, structures other than the second check valve 171 may be employed as long as the fuel in the mixing chamber 12 is prevented from flowing into the rich oil chamber 14b and the fuel in the rich oil chamber 14b is allowed to enter the mixing chamber 12.

Alternatively, the second check valve 171 may be a check valve with a spring or a check valve without a spring. In the present embodiment, the second check valve 171 is a check valve with a spring.

Furthermore, a cone 171a is arranged in the first check valve 17, the cone 171a is mounted on the inner wall of the valve body of the first check valve 17, the spring is sleeved on the cone 171a, one end of the spring abuts against the inner wall of the valve body, and the other end of the spring abuts against the cone 171 a; the tip of the cone 171a is disposed toward the outlet of the first check valve 17. It will be appreciated that the spring movement is guided by the taper 171a to avoid positional offset during the spring movement.

As shown in fig. 9, a duckbill valve 181 is disposed on the oil return passage 18, and the duckbill valve 181 blocks the oil return passage 18 from the fuel passage 16, and the fuel in the oil cup 20 is discharged into the oil tank 202 through the duckbill valve 181 and the oil return passage 18.

Specifically, the duckbill valve 181 includes a main valve portion 181a and an umbrella portion 181b, the main valve portion 181a being installed in the oil return passage 18, the main valve portion 181a being openable and closable at the pressure of the oil cup 20. The umbrella-shaped portion 181b is erected at an inlet of the oil return passage 18, the fuel passage 16 is sealed by the umbrella-shaped portion 181b, so that the oil return passage 18 is isolated from the fuel passage 16, and the fuel passage 16 can be opened and closed under the pressure of the oil cup 20.

Pressing the oil cup 20 may be divided into a process of pressing the oil cup 20 and a process of releasing the oil cup 20. During the process of pressing the oil cup 20, a positive pressure is generated inside the oil cup 20, and under the action of the positive pressure, the main valve portion 181a is opened, that is, the oil return passage 18 is opened, and the fuel in the oil cup 20 returns to the oil tank 202 from the oil return passage 18; at the same time, the umbrella-shaped portion 181b seals the fuel passage 16 by the positive pressure. During the release of the oil cup 20 (so that it returns to its normal non-depressed state), a negative pressure is generated inside the oil cup 20, under the effect of which the main valve portion 181a is closed, i.e. the oil return passage 18 is not open; at the same time, the umbrella-shaped portion 181b is lifted by this negative pressure, that is, the fuel passage 16 is opened, and the fuel in the rich chamber 14b enters the inside of the oil cup 20 through the fuel passage 16. It can be understood that, repeatedly pressing the oil cup 20 can form continuous positive and negative pressure, so that the oil pumping diaphragm 11 is driven to reciprocate under the action of the positive and negative pressure, namely, a pump function is formed, the fuel in the metering chamber 13 enters the oil-rich chamber 14b, the fuel in the part of the oil-rich chamber 14b is pumped into the starting channel 17 and enters the mixing chamber 12, and the fuel in the part of the oil-rich chamber 14b enters the oil cup 20 through the fuel channel 16; the fuel in the oil cup 20 is returned to the oil tank 202 through the oil return passage 18.

When the operator squeezes the oil cup 20, the fuel in the rich oil chamber 14b is injected into the mixing chamber 12 through the second check valve 171 of the starting passage 17; at this time, the first check valve 151 in the oil inlet passage 15 is closed, and the third check valve 161 on the fuel oil passage 16 is closed; when the operator releases the oil cup 20, the first check valve 151 is opened, the third check valve 161 is opened, the fuel in the metering chamber 13 enters the oil-rich chamber 14b through the oil inlet passage 15, part of the fuel in the oil-rich chamber 14b enters the oil cup 20 through the fuel, and at the moment, the second check valve 171 of the starting passage 17 is closed, so that the oil-rich chamber 14b is filled with the fuel to prepare for the subsequent cycle of injecting the fuel into the mixing chamber 12.

As shown in fig. 8, the main body 10 includes a cover 30 and a main body 40, the pumping diaphragm 11 is mounted between the cover 30 and the main body 40, and the oil cup 20 is mounted on the cover 30. The oil return passage 18 and the pumping force conduction passage 19 are arranged on the cover body 30, and the mixing chamber 12, the metering chamber 13, the oil inlet passage 15 and the starting passage 17 are respectively arranged on the main body 40.

Specifically, as shown in fig. 10 to 12, an oil return pipe 31 and a cover plate 32 are arranged on the cover 30, one end of the oil return pipe 31 is communicated with the oil return passage 18, and the other end of the oil return pipe 31 is communicated with the oil tank 202, so that the fuel oil in the oil cup 20 can enter the oil tank 202 through the oil return passage 18 and the oil return pipe 31, that is, the redundant air/fuel oil in the body 10 can be removed and collected into the oil tank 202. The cover plate 32 covers the side of the cover body 30 where the oil cup 20 is located, and the cover plate 32 is used for positioning the oil cup 20.

Further, as shown in fig. 13 to 18, a first cavity 33 is formed on a side surface of the cover 30 away from the oil cup 20, a second cavity 41 is formed on the main body 40, a position of the second cavity 41 is opposite to a position of the first cavity 33, the first cavity 33 is communicated with the pumping force conduction passage 19, and the second cavity 41 is respectively communicated with the fuel oil passage 16, the oil inlet passage 15, and the starting passage 17. The second chamber 41 and the first chamber 33 together form the fuel cavity 14, the pumping diaphragm 11 seals and isolates the first chamber 33 and the second chamber 41, respectively, so that the first chamber 33 forms the pumping cavity 14a and the second chamber 41 forms the oil-rich cavity 14 b; the oil cup 20, the pumping force transmission channel 19, the pumping diaphragm 11 and the pumping chamber 14a form a pump, by means of which the purpose of removing excess air/fuel and pre-injecting fuel into the mixing chamber 12 is achieved.

Further, a pulse fuel cavity 34 is further formed in the cover 30, a pulse pump cavity 42 is further formed in the main body 40, the pulse fuel cavity 34 is opposite to the pulse pump cavity 42, and the pulse fuel cavity 34 and the pulse fuel cavity 43 are isolated and sealed by the pump oil membrane 11. The pulse fuel oil cavity 34 is connected with the crankcase of the engine 201, one end of the pulse pump cavity 42 is communicated with the metering chamber 13 through an oil path, and the other end of the pulse pump cavity is communicated with the oil tank 202 through an oil path. Before the engine 201 is started, the oil cup 20 is pressed, fuel in the oil tank flows into the pulse fuel cavity 34 through an oil path, and fuel in the pulse pump cavity 42 enters the metering chamber 13 through the oil path. After the engine 201 is started, a pulse is sent from the crankcase of the engine 201 to the pulse fuel cavity 34, so that the action of the pump fuel diaphragm 11 is caused, fuel enters the pulse pump cavity 42 from the fuel tank 202 under the action of the pump fuel diaphragm 11, then the fuel in the pulse pump cavity 42 is conveyed to the metering chamber 13 and finally supplied to the mixing chamber 12 for the normal operation of the engine 201.

Referring to fig. 16 and 17, an oil inlet pipe 43 is disposed on the main body 40, one end of the oil inlet pipe 43 is communicated with the oil tank 202, and the other end is communicated with the pulse pump chamber 42 through an oil path, so that the fuel in the oil tank 202 can enter the pulse pump chamber 42. The main body 40 is further provided with a filter screen 44, and the filter screen 44 is arranged between the pulse pump cavity 42 and the metering chamber 13 and used for filtering fuel entering the metering chamber 13 from the pulse pump cavity 42.

Referring to fig. 2, a pressure balance channel 45 is further disposed on the body 10, one end of the pressure balance channel 45 is communicated with the starting channel 17, and the other end is communicated with the atmosphere. Here, the pressure balance passage 45 is provided to prevent the fuel in the rich oil chamber 14b from being sucked out by the negative pressure generated when the engine 201 is normally operated.

Further, the pressure balance channel 45 is provided with a check 46 for preventing the starting fuel in the starting channel 17 from flowing out through the pressure balance channel 45.

Preferably, the check 46 may be a check valve or other component having a check function.

Further, the pressure balance passage 45 is opened on the main body 40, and the check member 46 is installed at one end of the pressure balance passage 45 communicating with the atmosphere.

Referring to fig. 2, a choke valve 50 is disposed on the body 10, and the choke valve 50 is located at the mixing chamber 12 for controlling the ratio of air entering the mixing chamber 12. Specifically, an air inlet (not labeled) is formed in the body 10, the air inlet is communicated with the mixing chamber 12, and the choke valve 50 is arranged at the air inlet to control the opening degree of the air inlet, so that the purpose of controlling the proportion of air entering the mixing chamber 12 is achieved.

Preferably, in this embodiment, the choke valve 50 is a large air volume choke valve, the area of the choke valve plate is small, the corresponding air intake is increased, and the size of the choke plate depends on the matching of different engines. The intake air amount is increased when the engine is started. Compared with the prior art, the user does not need to manually open the air door to the 1/2 position to realize the preheating of the engine.

The working principle of the gasifier rich easy start device 100 is explained as follows:

before the engine 201 is started:

the oil cup 20 is pressed, pressure (positive pressure and negative pressure) generated by the oil cup 20 is transmitted to the oil pumping cavity 14a, so that the oil pumping diaphragm 11 is driven to move back and forth, under the action of the oil pumping diaphragm 11, fuel in the metering chamber 13 enters the oil-rich cavity 14b through the oil inlet channel 15, part of fuel in the oil-rich cavity 14b enters the oil cup 20 through the fuel channel 16, the fuel in the oil cup 20 is discharged into the oil tank 202 through the oil return channel 18, and redundant air/fuel in the body 10 (each channel and each cavity) is cleared through the process;

meanwhile, under the action of the pumping diaphragm 11, part of the fuel in the rich oil chamber 14b is injected into the mixing chamber 12 through the starting channel 17, so that a certain amount of fuel is injected into the mixing chamber 12 in advance before the engine 201 is started, and the concentration of the mixture in the mixing chamber 12 is improved.

After the engine 201 is started:

no longer pressing the cup 20, a pulse is sent from the crankcase of the engine 201 to the pulse fuel chamber 34, causing the pumping diaphragm 11 to act, under the action of the pumping diaphragm 11, fuel enters the pulse pump chamber 42 from the fuel tank 202, then the fuel in the pulse pump chamber 42 is delivered to the metering chamber 13 and finally supplied to the mixing chamber 12 for the normal operation of the engine 201.

It can be understood that the gasifier rich oil simple starting device 100 adopts the pre-fuel injection technology (fuel is injected into the mixing chamber 12 in advance) to realize rich oil starting of the engine 201, and then is matched with the large air volume choke valve to realize simple step starting; the operation is simple and convenient; the starting times are less; starting is easy at low temperatures (e.g., 0 degrees celsius).

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

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The simple oil-rich starting device for the gasifier is characterized by comprising a body and an oil cup, wherein the oil cup is arranged on the body, an oil pumping diaphragm is arranged in the body, a mixing chamber, a metering chamber and a fuel oil chamber are arranged in the body, and the fuel oil chamber is divided into an oil pumping chamber and an oil-rich chamber by the oil pumping diaphragm; an oil inlet channel, a fuel oil channel, a starting channel and an oil return channel are also formed in the body;

2. The gasifier rich simple starting device of claim 1, wherein a first check valve is installed in the oil inlet channel, and the first check valve is used for preventing the fuel in the rich chamber from flowing into the metering chamber.

3. The gasifier rich start device of claim 1 wherein a second check valve is installed in the start channel to prevent fuel or air in the mixing chamber from entering the rich chamber.

4. The gasifier rich simple starting device of claim 1, wherein a duckbill valve is disposed on the oil return channel, and the duckbill valve separates the fuel channel and the oil return channel, and the fuel in the oil cup is discharged into an oil tank through the duckbill valve and the oil return channel.

5. The simple oil-rich starter of claim 1, wherein a pumping channel is further disposed in the main body, one end of the pumping channel is connected to the inside of the oil cup, the other end of the pumping channel is connected to the pumping cavity, and the pressure generated by pressing the oil cup is transmitted to the pumping cavity through the pumping channel to drive the pumping diaphragm to move.

6. The gasifier rich oil simple starting device as claimed in claim 1, wherein the body is further provided with a pressure balance channel, one end of the pressure balance channel is communicated with the starting channel, and the other end of the pressure balance channel is communicated with the atmosphere.

7. The apparatus as claimed in claim 1, wherein a choke is provided on the body for controlling the ratio of air entering the mixing chamber.

8. The gasifier rich simple start device of claim 1 wherein a third check valve is disposed on the fuel passage for preventing fuel or air in the fuel cup or fuel passage from flowing into the rich chamber.

9. The simple and easy starting drive of rich oil of gasifier of claim 1, characterized in that, the body includes main part and lid, pump oil diaphragm locate between the main part and the lid, the lid is located in the main part and the oil cup install in on the lid, oil feed passageway, start the passageway and set up in the main part, oil return passageway sets up in on the lid.

10. An engine starting system comprising an engine and a vaporizer rich easy start device connected to the engine, wherein the vaporizer rich easy start device is the vaporizer rich easy start device according to any one of claims 1 to 9.