Gasifier oil-rich simple starting device, engine starting system and starting method thereof

Abstract

The present invention relates to the technical field of carburetors, and in particular to a carburetors oil-rich simple starting device, an engine starting system and a starting method thereof. A carburetors oil-rich simple starting device 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 chamber are provided in the body, and the oil pumping diaphragm separates the fuel chamber into an oil pumping chamber and an oil-rich chamber; an oil inlet channel, a fuel passage, a starting channel and an oil return channel are also provided in the body; the oil pumping chamber is connected to the interior of the oil cup, and the oil-rich chamber is connected to the interior of the oil cup through the fuel passage; one end of the oil inlet channel is connected to the oil-rich chamber, and the other end is connected to the metering chamber; one end of the starting channel is connected to the oil-rich chamber, and the other end is connected to the mixing chamber; one end of the oil return channel is connected to the interior of the oil cup, and the other end is connected to the fuel tank.

Description

Technical Field

[0001] The invention relates to the technical field of carburetors, and in particular to a carburetors oil-rich simple starting device, an engine starting system and a starting method thereof. Background Art

[0002] When the engine is in the warm state, the economic air-fuel ratio is set at 13 to 15:1 when it leaves the factory, but the engine requires an air-fuel ratio of 6 to 12:1 when starting the engine cold, that is, when starting the engine cold, a higher fuel is required. The choke device is commonly used, and the choke is closed to reduce the air intake to obtain a higher fuel ratio for starting. Then, pull the engine starter by hand until a POP sound (pop) is heard. The use of a choke device is not only complex in structure, but also cumbersome in starting steps and the POP sound (pop) is difficult to judge, which can easily cause the engine to flood and be difficult to start; at the same time, the engine is difficult to start or cannot start at low temperatures. Summary of the invention

[0003] Based on this, it is necessary to provide a simple oil-rich starting device for a gasifier that is simple to operate and easy to start in order to solve the above technical problems.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A carburetor oil-rich simple starting device 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 cavity are opened in the body, and the oil pumping diaphragm separates the fuel cavity into an oil pumping cavity and an oil-rich cavity; an oil inlet channel, a fuel cavity, a starting channel and an oil return channel are also opened in the body;

[0006] The pump oil chamber is connected to the interior of the oil cup, and the rich oil chamber is connected to the interior of the oil cup through the fuel channel; one end of the oil inlet channel is connected to the rich oil chamber, and the other end is connected to the metering chamber; one end of the starting channel is connected to the rich oil chamber, and the other end is connected to the mixing chamber; one end of the oil return channel is connected to the interior of the oil cup, and the other end is connected to the fuel tank.

[0007] In the present application, an oil cup is provided and an oil inlet channel, a fuel channel, a starting channel and an oil return channel are opened in the main body; the oil cup is pressed, and the fuel in the metering chamber enters the oil-rich chamber through the oil inlet channel, part of the fuel in the oil-rich chamber enters the oil cup through the fuel channel, and part of the fuel in the oil cup enters the fuel tank through the oil return channel; at the same time, under the action of the oil cup, part of the fuel in the oil-rich chamber is sprayed into the mixing chamber through the starting channel in advance for engine starting. It can be understood that, from the above description, the metering chamber-oil inlet channel-rich oil chamber-fuel channel-oil cup-return oil channel constitutes an air / fuel removal channel to remove excess air in the main body; the metering chamber-oil inlet channel-rich oil chamber-starting channel-mixing chamber constitutes a pre-injection channel, and the oil cup is pressed to remove excess air in the main body while pre-spraying fuel into the mixing chamber, thereby increasing the air-fuel ratio required when the engine is started, so that the engine can start quickly. The above-mentioned carburetor rich oil simple starting device is not only simple in structure and easy to operate, but also can reduce the number of engine starts and is easier to start at low temperatures.

[0008] In one of the embodiments, a first check valve is installed in the oil inlet passage, and the first check valve is used to prevent the fuel in the oil-rich cavity from flowing into the metering chamber.

[0009] In one of the embodiments, a second check valve is installed in the starting passage, and the second check valve is used to prevent the fuel or air in the mixing chamber from entering the rich oil chamber.

[0010] In one embodiment, a duckbill valve is provided on the oil return channel, and the fuel channel and the oil return channel are separated by the duckbill valve, and the fuel in the oil cup is discharged into the fuel tank through the duckbill valve and the oil return channel.

[0011] In one of the embodiments, a pump force conduction channel is further provided in the main body, one end of the pump force conduction channel is connected to the interior of the oil cup, and the other end is connected to the pump oil chamber. The pressure generated by pressing the oil cup is transmitted to the pump oil chamber through the pump force conduction channel to drive the pump oil diaphragm to move.

[0012] In one of the embodiments, the main 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.

[0013] The pressure balance channel is provided to prevent the negative pressure generated when the engine is working normally from sucking out the fuel in the oil-rich cavity.

[0014] In one of the embodiments, a choke is provided on the main body, and the choke is used to control the proportion of air entering the mixing chamber.

[0015] The present invention also provides the following technical solutions:

[0016] An engine starting system comprises an engine and a carburetor rich oil simple starting device, wherein the carburetor rich oil simple starting device is connected to the engine and adopts the carburetor rich oil simple starting device described above.

[0017] In the present application, the carburetor rich oil simple starting device is provided, so that the engine starting is more convenient and easy.

[0018] The present invention also provides the following technical solutions:

[0019] An engine starting method is implemented based on the above-mentioned carburetor rich oil simple starting device, and the method comprises the following steps:

[0020] Pressing the oil cup, the pressure generated by the oil cup is transmitted to the oil pump chamber, and drives the oil pump diaphragm to move, and under the action of the oil pump diaphragm, the fuel in the oil-rich chamber is sprayed into the mixing chamber in advance; and

[0021] Pull the engine starter until the engine is running;

[0022] In the present application, the above-mentioned engine starting method is not only simple and easy to operate, but also can reduce the number of engine starts and has high engine starting efficiency.

[0023] In one embodiment, the step of pressing the oil cup includes:

[0024] The oil cup is squeezed to generate positive pressure, which drives the oil pump diaphragm to move, so that the fuel in the oil-rich cavity is sprayed into the mixing chamber through the starting channel, and at the same time, the fuel in the oil cup enters the fuel tank through the oil return channel; and

[0025] The oil cup is released to generate negative pressure, and the fuel in the metering chamber is sucked into the oil-rich cavity through the oil inlet passage. At the same time, the fuel in the oil-rich cavity is sucked into the oil cup through the fuel passage.

[0026] In one of the embodiments, a first check valve is installed in the oil inlet passage, and a second check valve is installed in the starting passage; in the step of squeezing the oil cup, the first check valve is closed, and the second check valve is opened.

[0027] In one of the embodiments, in the step of loosening the oil cup, the first check valve is opened and the second check valve is closed.

[0028] In one embodiment, the step of pressing the oil cup further comprises:

[0029] Close the choke.

[0030] Compared with the prior art, the carburetor oil-rich simple starting device is provided with an oil cup and an oil inlet channel, a fuel channel, a starting channel and an oil return channel in the main body; when the oil cup is pressed, the fuel in the metering chamber enters the oil-rich chamber through the oil inlet channel, part of the fuel in the oil-rich chamber enters the oil cup through the fuel channel, and part of the fuel in the oil cup enters the fuel tank through the oil return channel; at the same time, under the action of the oil cup, part of the fuel in the oil-rich chamber is sprayed into the mixing chamber through the starting channel in advance for engine starting. It can be understood that, from the above description, the metering chamber-oil inlet channel-rich oil chamber-fuel channel-oil cup-return oil channel constitutes an air / fuel removal channel to remove excess air in the main body; the metering chamber-oil inlet channel-rich oil chamber-starting channel-mixing chamber constitutes a pre-injection channel, and the oil cup is pressed to remove excess air in the main body while pre-spraying fuel into the mixing chamber, thereby increasing the air-fuel ratio required when the engine is started, so that the engine can start quickly. The above-mentioned carburetor rich oil simple starting device is not only simple in structure and easy to operate, but also can reduce the number of engine starts and is easier to start at low temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A block diagram of an engine starting system provided by the present invention;

[0032] Figure 2 A schematic diagram of the structure of the fuel-rich simple starting device for a gasifier provided by the present invention;

[0033] Figure 3 A partial exploded view of the fuel-rich simple starting device for a gasifier provided by the present invention;

[0034] Figure 4 A top view of the fuel-rich simple starting device for a gasifier provided by the present invention;

[0035] Figure 5 A bottom view of the fuel-rich simple starting device for a gasifier provided by the present invention;

[0036] Figure 6 A top view of the main body provided by the present invention;

[0037] Figure 7 The present invention provides Figure 2 Sectional view at AA in the middle;

[0038] Figure 8 The present invention provides Figure 4 Cross-sectional view at the middle BB;

[0039] Fig. 9 The present invention provides Figure 4Cross-sectional view at CC;

[0040] Fig.10 The present invention provides Figure 4 Cross-sectional view at DD;

[0041] Fig.11 The present invention provides Figure 5 Cross-sectional view at EE;

[0042] Fig.12 The present invention provides Figure 6 Cross-sectional view at FF;

[0043] Fig.13 A three-dimensional diagram of the cover provided by the present invention;

[0044] Fig.14 A partial cross-sectional view of a perspective of the cover body provided by the present invention;

[0045] Fig.15 A partial cross-sectional view of another perspective of the cover provided by the present invention;

[0046] Fig.16 A partial cross-sectional view of the main body of the present invention provided from a perspective;

[0047] Fig.17 A partial cross-sectional view of another perspective of the main body provided by the present invention;

[0048] Fig.18 A partial cross-sectional view of another perspective of the main body provided by the present invention;

[0049] Fig.19 The present invention provides a flow chart of an engine starting method.

[0050] In the figure, a carburetor rich oil simple starting device 100, a body 10, an oil pump diaphragm 11, a mixing chamber 12, a metering chamber 13, a fuel chamber 14, an oil pump chamber 14a, an oil rich chamber 14b, an oil inlet passage 15, a first check valve 151, a fuel passage 16, a third check valve 161, a starting passage 17, a second check valve 171, a cone 171a, an oil return passage 18, a duckbill valve 181, a main valve part 181a, an umbrella part 181b, a pump force transmission passage 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 chamber 34, a body 40, a second chamber 41, a pulse pump chamber 42, an oil inlet pipe 43, a filter screen 44, a pressure balance passage 45, a check piece 46, an engine starting system 200, an engine 201, a fuel tank 202, and a choke 50. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0054] like Figure 1 As shown, the present invention provides an engine starting system 200, which is mainly used in outdoor gardening tools, such as lawn mowers, lawn mowers, and woodcutters. Since outdoor gardening tools have a small displacement and are handheld, most of them are hand-pulled to start. Of course, in other embodiments, the engine starting system 200 can also be applied to other non-handheld devices or machines.

[0055] The engine starting system 200 includes an engine 201 and a carburetor rich oil simple starting device 100, wherein the carburetor rich oil simple starting device 100 is connected to the engine 201, and the carburetor rich oil simple starting device 100 is used to provide the required fuel for the engine 201 to start before the engine 201 starts, thereby reducing the number of starts of the engine 201 and improving the starting efficiency. In particular, in a low temperature environment, the engine 201 is easier to start. Here, the low temperature environment refers to the engine 201 being in a starting environment or operating environment when the ambient temperature is below -15°C to 5°C.

[0056] Specifically, the gasifier oil-rich simple starting device 100 can be applied to a rotary valve gasifier or a butterfly valve gasifier. Of course, the gasifier oil-rich simple starting device 100 can adapt to both the rotary valve gasifier and the butterfly valve gasifier, and the oil circuit and working principle of the gasifier oil-rich simple starting device 100 are basically the same, and the difference may only be the position of the oil circuit. In this embodiment, the butterfly valve gasifier is taken as an example and an object of explanation, and the structure and working principle of the gasifier oil-rich simple starting device 100 are specifically described.

[0057] like Figures 2 to 12 The carburetor rich oil simple starting device 100 comprises a main body 10 and an oil cup 20, wherein the oil cup 20 is arranged on the main body 10, wherein an oil pumping diaphragm 11 is arranged in the main body 10, wherein a mixing chamber 12, a metering chamber 13 and a fuel chamber 14 are opened in the main body 10, wherein the oil pumping diaphragm 11 separates the fuel chamber 14 into an oil pumping chamber 14a and an oil rich chamber 14b; wherein the mixing chamber 12 is connected to the intake manifold of the engine 201, so that the fuel in the mixing chamber 12 can enter the intake manifold and be used for starting the engine 201, wherein the metering chamber 13 is used for metering the amount of fuel, and wherein the metering chamber 13 is connected to the fuel tank 202 through an oil circuit.

[0058] Of course, in addition to the body 10 and the oil cup 20 mentioned above, the carburetor rich oil simple starting device 100 also includes a throttle assembly (not labeled), a choke assembly (not labeled), and a linkage assembly (not labeled) and other components, which cooperate to achieve the overall function of the carburetor rich oil simple starting device 100. It can be understood that in this embodiment, the throttle assembly, the choke assembly, the linkage assembly and other components are not the focus of this embodiment, and will not be described in detail here.

[0059] For further information, please also refer to Figure 13-Figure 18 The body 10 is also provided with an oil inlet passage 15, a fuel passage 16, a starting passage 17 and an oil return passage 18; the pump oil chamber 14a is communicated with the interior of the oil cup 20, and the rich oil chamber 14b is communicated with the interior of the oil cup 20 through the fuel passage 16; one end of the oil inlet passage 15 is communicated with the rich oil chamber 14b, and the other end is communicated with the metering chamber 13; one end of the starting passage 17 is communicated with the rich oil chamber 14b, and the other end is communicated with the mixing chamber 12; one end of the oil return passage 18 is communicated with the interior of the oil cup 20, and the other end is connected to the oil tank 202.

[0060] By pressing the oil cup 20, the fuel in the fuel tank 202 enters the metering chamber 13 through the pipe, the fuel in the metering chamber 13 enters the oil-rich chamber 14b through the oil inlet channel 15, part of the fuel in the oil-rich chamber 14b enters the oil cup 20 through the fuel channel 16, and part of the fuel in the oil cup 20 enters the fuel tank through the oil return channel 18; at the same time, under the action of the oil cup 20, part of the fuel in the oil-rich chamber 14b is sprayed into the mixing chamber 12 through the starting channel 17 in advance for starting the engine 201.

[0061] It can be understood that, from the above description, the metering chamber 13, the oil inlet channel 15, the rich oil chamber 14b, the fuel channel 16, the oil cup 20 and the return oil channel 18 constitute an air / fuel cleaning channel, and the excess air / fuel in the body 10 (each channel and each chamber) is cleaned through the air / fuel cleaning channel; the metering chamber 13, the oil inlet channel 15, the rich oil chamber 14b, the starting channel 17, and the mixing chamber 12 constitute a pre-injection channel, and the pre-injection channel is used to pre-provide starting fuel to the engine 201. By pressing the oil cup 20, while removing excess air / fuel in the main body 10, part of the fuel is pre-sprayed into the mixing chamber 12, thereby increasing the required mixed gas concentration when starting the engine 201, so that the engine 201 can start quickly. The above-mentioned carburetor rich oil simple starting device 100 is not only simple in structure and easy to operate, but also can reduce the number of starts of the engine 201 and is easier to start at low temperatures.

[0062] For further information, see Figures 8 to 10 A pump force conduction channel 19 is also provided on the body 10, one end of the pump force conduction channel 19 is communicated with the inside of the oil cup 20, and the other end is communicated with the pump oil chamber 14a. The oil cup 20, the pump force conduction channel 19, the pump oil chamber 14a and the pump oil diaphragm 11 form a pump, so that the pressure (pump force) generated by pressing the oil cup 20 is transmitted to the pump oil chamber 14a through the pump force conduction channel 19 to drive the pump oil diaphragm 11 to operate and pump oil.

[0063] Please continue reading Fig.11, a first check valve 151 is installed in the oil inlet passage 15, and the first check valve 151 is used to prevent the fuel in the rich oil chamber 14b from flowing back into the metering chamber 13. It can be understood that the first check valve 151 is unidirectional, that is, it 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, other structures besides the first check valve 151 can also be used, as long as it can prevent the fuel in the rich oil chamber 14b from flowing into the metering chamber 13 and allow the fuel in the metering chamber 13 to enter the rich oil chamber 14b.

[0064] Preferably, the first check valve 151 is a check valve with a spring or without a spring. In this embodiment, the first check valve 151 is a check valve without a spring.

[0065] like Figure 6 As shown, a third check valve 161 is disposed on the fuel passage 16, and the third check valve 161 is used to prevent the fuel and air in the oil cup 20 or the fuel passage 16 from flowing back into the oil-rich chamber 14b.

[0066] like Fig.11 as well as Fig.17 As shown, a second check valve 171 is installed in the starting passage 17, and the installation direction of the second check valve 171 is opposite to the installation direction of the first check valve 151. The second check valve 171 is used to prevent the fuel or air in the mixing chamber 12 from flowing back into the rich oil chamber 14b. It can be understood that the second check valve 171 is a one-way conduction, that is, it only allows the rich oil 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 oil chamber 14b. Of course, in other embodiments, other structures besides the second check valve 171 can also be used, as long as it can prevent the fuel in the mixing chamber 12 from flowing into the rich oil chamber 14b and allow the fuel in the rich oil chamber 14b to enter the mixing chamber 12.

[0067] Optionally, the second check valve 171 may be a check valve with a spring or a check valve without a spring. In this embodiment, the second check valve 171 is a check valve with a spring.

[0068] Furthermore, a cone 171a is provided inside the first check valve 17, and the cone 171a is installed on the inner wall of the valve body of the first check valve 17. A spring is sleeved on the cone 171a, and one end of the spring abuts against the inner wall of the valve body, and the other end abuts against the cone 171a; the tip of the cone 171a is arranged toward the outlet of the first check valve 17. It can be understood that the cone 171a is used to guide the movement of the spring to avoid position deviation during the movement of the spring.

[0069] like Fig. 9 As shown, a duckbill valve 181 is provided on the oil return channel 18, and the fuel channel 16 is separated from the oil return channel 18 by the duckbill valve 181, and the fuel in the oil cup 20 is discharged into the oil tank 202 through the duckbill valve 181 and the oil return channel 18.

[0070] Specifically, the duckbill valve 181 includes a main valve portion 181a and an umbrella portion 181b. The main valve portion 181a is installed in the oil return passage 18, and the main valve portion 181a can be opened and closed by the pressure of the oil cup 20. The umbrella portion 181b is arranged at the inlet of the oil return passage 18, and the umbrella portion 181b seals the fuel passage 16, thereby isolating the oil return passage 18 from the fuel passage 16, and the fuel passage 16 can also be opened and closed by the pressure of the oil cup 20.

[0071] Pressing the oil cup 20 can be divided into a process of squeezing the oil cup 20 and a process of releasing the oil cup 20. In the process of squeezing the oil cup 20, positive pressure is generated inside the oil cup 20, and under the action of the positive pressure, the main valve part 181a is opened, that is, the oil return passage 18 is opened, and the fuel in the oil cup 20 is returned to the oil tank 202 from the oil return passage 18; at the same time, under the action of the positive pressure, the umbrella part 181b seals the fuel passage 16. In the process of releasing the oil cup 20 (so that it returns to its normal non-pressed state), negative pressure is generated inside the oil cup 20, and under the action of the negative pressure, the main valve part 181a is closed, that is, the oil return passage 18 is not conductive; at the same time, the umbrella part 181b is lifted up under the action of the negative pressure, that is, the fuel passage 16 is opened, and the fuel in the rich oil chamber 14b enters the inside of the oil cup 20 through the fuel passage 16. It can be understood that by repeatedly pressing the oil cup 20, continuous positive and negative pressures can be formed, so that under the action of the positive and negative pressures, the oil pump diaphragm 11 is driven to move back and forth, that is, the function of a pump is formed, so that the fuel in the metering chamber 13 enters the rich oil chamber 14b, part of the fuel in the rich oil chamber 14b is pumped into the starting channel 17 and enters the mixing chamber 12, and part of the fuel in the rich oil chamber 14b enters the oil cup 20 through the fuel channel 16; the fuel in the oil cup 20 is returned to the fuel tank 202 through the return oil channel 18.

[0072] When the operator squeezes the oil cup 20, the fuel in the rich oil chamber 14b is sprayed into the mixing chamber 12 through the second check valve 171 of the starting channel 17; at this time, the first check valve 151 in the oil inlet channel 15 is closed, and the third check valve 161 provided on the fuel channel 16 is closed; when the operator releases the oil cup 20, the first check valve 151 is opened, and the third check valve 161 is opened, and the fuel in the metering chamber 13 enters the rich oil chamber 14b through the oil inlet channel 15, and part of the fuel in the rich oil chamber 14b enters the oil cup 20 through the fuel passage, and at this time, the second check valve 171 of the starting channel 17 is closed, so that the rich oil chamber 14b is filled with fuel, preparing for the subsequent cycle of spraying fuel into the mixing chamber 12.

[0073] like Figure 8 As shown, the body 10 includes a cover 30 and a main body 40, the pump oil diaphragm 11 is installed between the cover 30 and the main body 40, and the oil cup 20 is installed on the cover 30. The oil return channel 18 and the pump force transmission channel 19 are opened on the cover 30, and the mixing chamber 12, the metering chamber 13, the oil inlet channel 15, and the starting channel 17 are respectively opened on the main body 40.

[0074] Specifically, Figures 10 to 12As shown, the cover body 30 is provided with an oil return pipe 31 and a cover plate 32, one end of the oil return pipe 31 is connected to the oil return passage 18, and the other end is connected to the oil tank 202, so that the fuel 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 excess air / fuel in the body 10 is removed and collected into the oil tank 202. The cover plate 32 is provided on the side of the cover body 30 where the oil cup 20 is provided, and the cover plate 32 is used to position the oil cup 20.

[0075] For further information, please refer to Figures 13 to 18 As shown, the cover body 30 is provided with a first chamber 33 on one side away from the oil cup 20, and the main body 40 is provided with a second chamber 41. The position of the second chamber 41 is arranged opposite to the position of the first chamber 33. The first chamber 33 is communicated with the pump force transmission channel 19, and the second chamber 41 is communicated with the fuel channel 16, the fuel inlet channel 15 and the starting channel 17 respectively. The second chamber 41 and the first chamber 33 together form the fuel chamber 14. The pump oil membrane 11 seals and isolates the first chamber 33 and the second chamber 41 respectively, so that the first chamber 33 forms the pump oil chamber 14a, and the second chamber 41 forms the rich oil chamber 14b. The oil cup 20, the pump force transmission channel 19, the pump oil membrane 11 and the pump oil chamber 14a form a pump, that is, the purpose of removing excess air / fuel and pre-spraying fuel into the mixing chamber 12 is achieved through the pump.

[0076] Furthermore, a pulse fuel chamber 34 is provided on the cover body 30, and a pulse pump chamber 42 is provided on the main body 40. The pulse fuel chamber 34 is arranged opposite to the pulse pump chamber 42, and the pumping oil diaphragm 11 separates and seals the pulse fuel chamber 34 and the pulse pump chamber 42. The pulse fuel chamber 34 is connected to the crankcase of the engine 201, and one end of the pulse pump chamber 42 is connected to the metering chamber 13 through an oil circuit, and the other end is connected to the oil tank 202 through an oil circuit. Before starting the engine 201, the oil cup 20 is pressed, and the fuel in the oil tank flows into the pulse fuel chamber 34 through the oil circuit, and the fuel in the pulse pump chamber 42 enters the metering chamber 13 through the oil circuit. After the engine 201 is started, a pulse is sent from the crankcase of the engine 201 to the pulse fuel chamber 34, causing the oil pumping diaphragm 11 to move. Under the action of the oil pumping diaphragm 11, the fuel enters the pulse pump chamber 42 from the fuel tank 202, and then the fuel in the pulse pump chamber 42 is transported to the metering chamber 13, and finally supplied to the mixing chamber 12 for the normal operation of the engine 201.

[0077] Please continue reading Fig.16 and Fig.17 The main body 40 is provided with an oil inlet pipe 43, one end of which is connected to the oil tank 202, and the other end of which is connected to 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 also provided with a filter 44, which is arranged between the pulse pump chamber 42 and the metering chamber 13 to filter the fuel entering the metering chamber 13 from the pulse pump chamber 42.

[0078] See also Figure 2 The main body 10 is also provided with a pressure balance channel 45, one end of which is connected to the starting channel 17, and the other end is connected to the atmosphere. Here, the pressure balance channel 45 is provided to prevent the negative pressure generated when the engine 201 is working normally from sucking out the fuel in the rich oil chamber 14b.

[0079] Furthermore, a check member 46 is provided on the pressure balance passage 45 , which is used to prevent the starting fuel in the starting passage 17 from flowing out through the pressure balance passage 45 .

[0080] Preferably, the check member 46 may be a check valve or other components having a check function.

[0081] Furthermore, the pressure balance channel 45 is opened on the main body 40 , and the check member 46 is installed at one end of the pressure balance channel 45 communicating with the atmosphere.

[0082] Please continue reading Figure 2 The main body 10 is provided with a choke 50, and the choke 50 is located at the mixing chamber 12 to control the proportion of air entering the mixing chamber 12. Specifically, the main body 10 is provided with an air inlet (not marked), and the air inlet is connected to the mixing chamber 12. The choke 50 is provided at the air inlet to control the opening of the air inlet, thereby achieving the purpose of controlling the proportion of air entering the mixing chamber 12.

[0083] Preferably, in this embodiment, the choke 50 is a large air volume choke, the choke plate area is small, the corresponding air intake volume is increased, and the size of the choke plate depends on the matching of different engines. The air intake volume is increased when the engine is started. Compared with the prior art, the user does not need to manually open the throttle to the 1 / 2 position to achieve engine preheating.

[0084] The working principle of the gasifier oil-rich simple starting device 100 is described below:

[0085] Before starting the engine 201:

[0086] The oil cup 20 is pressed, and the pressure (positive and negative pressure) generated by the oil cup 20 is transmitted to the pump oil chamber 14a, thereby driving the pump oil diaphragm 11 to make a reciprocating motion. Under the action of the pump oil diaphragm 11, the fuel in the metering chamber 13 enters the rich oil chamber 14b through the oil inlet channel 15, and part of the fuel in the rich oil chamber 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. Through the above process, the excess air / fuel in the body 10 (each channel and each chamber) is cleared;

[0087] At the same time, under the action of the oil pump diaphragm 11, part of the fuel in the oil-rich chamber 14b is sprayed into the mixing chamber 12 through the starting channel 17, so as to achieve pre-injection of a certain amount of fuel into the mixing chamber 12 before the engine 201 starts, thereby increasing the concentration of the mixed gas in the mixing chamber 12.

[0088] After the engine 201 is started:

[0089] The oil cup 20 is no longer pressed, and a pulse is sent from the crankcase of the engine 201 to the pulse fuel chamber 34, causing the oil pumping diaphragm 11 to move. Under the action of the oil pumping diaphragm 11, the fuel enters the pulse pump chamber 42 from the fuel tank 202, and then the fuel in the pulse pump chamber 42 is transported to the metering chamber 13, and finally supplied to the mixing chamber 12 for the normal operation of the engine 201.

[0090] It can be understood that the present carburetor rich fuel simple starting device 100 adopts pre-injection technology (injecting fuel into the mixing chamber 12 in advance) to achieve rich fuel starting of the engine 201, and then cooperates with the use of a large air volume choke to achieve simple step starting; the operation is simple and convenient; the number of starts is small; and it is easy to start at low temperatures (such as 0 degrees Celsius).

[0091] As shown in Figure 19, the present invention also provides an engine starting method, which is implemented based on the above-described carburetor rich oil simple starting device 10, and the method includes the following steps:

[0092] Step S1, pressing the oil cup 20, the pressure generated by the oil cup 20 is transmitted to the oil pump chamber 14a, and drives the oil pump diaphragm 11 to operate, and when the oil pump diaphragm 11 operates, the fuel in the oil-rich chamber 14b is sprayed into the mixing chamber 12 in advance; and

[0093] Step S2, pulling the starter of the engine 201 until the engine is running;

[0094] In the prior art, the method for starting the engine 201 is as follows:

[0095] The first step is to squeeze the oil cup; the second step is to close the choke; the third step is to fully open the throttle or set the throttle to the fast idle position; the fourth step is to manually pull the engine starter until a POP sound is heard; the fifth step is to move the choke to the 1 / 2 position; the sixth step is to manually pull the engine starter until the engine is running; the seventh step is to keep the engine running to warm it up; the eighth step is to move the choke to the fully open position; the ninth step is to increase or decrease the throttle to work normally.

[0096] It is understandable that, compared with the existing starting method, the engine starting method provided in this embodiment is not only simple and has fewer steps, but also easy to operate, can reduce the number of engine starts, and has high engine starting efficiency. In particular, the engine 201 is easy to start in a low temperature environment.

[0097] Further, in the step S1, pressing the oil cup 20 can be divided into the following steps:

[0098] Step S11, squeezing the oil cup 20 to generate positive pressure, driving the oil pump diaphragm 11 to operate, so that the fuel in the oil-rich chamber 14b is sprayed into the mixing chamber 12 through the starting channel 17, and at the same time, the fuel in the oil cup 20 enters the fuel tank through the oil return channel 18;

[0099] Step S12, release the oil cup 20 to generate negative pressure, and the fuel in the metering chamber 13 is sucked into the oil-rich chamber 14 b through the oil inlet channel 15. At the same time, the fuel in the oil-rich chamber 14 b is sucked into the oil cup 20 through the fuel channel 16.

[0100] Preferably, in step S11, the first check valve 151 is closed and the second check valve 171 is opened, that is, the fuel in the rich oil chamber 14b can enter the mixing chamber 12 through the starting channel 17, but cannot return to the metering chamber 13 through the oil inlet channel 15.

[0101] In step S12, the first check valve 151 is opened and the second check valve 171 is closed, that is, the fuel in the metering chamber 13 can enter the rich oil chamber 14b through the oil inlet channel 15, and the fuel in the mixing chamber 12 cannot return to the rich oil chamber 14b through the starting channel 17.

[0102] In step S2, the starter of the engine 201 is pulled until the engine is running, which can be done manually or by driving the starter of the engine 201 through a power mechanism.

[0103] In this embodiment, the starter of the engine 201 is started by manually pulling.

[0104] Further, before step S2 and after step S1, the engine starting method further includes the following steps:

[0105] S13, close the choke valve 50.

[0106] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0107] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A simple fuel-rich starting device for a gasifier, characterized in that: It comprises a body and an oil cup, wherein the oil cup is arranged on the body, an oil pump diaphragm is arranged in the body, a mixing chamber, a metering chamber and a fuel cavity are opened in the body, and the oil pump diaphragm separates the fuel cavity into an oil pump cavity and an oil-rich cavity; an oil inlet channel, a fuel cavity, a starting channel and an oil return channel are also opened in the body; The pump oil chamber is communicated with the interior of the oil cup, and the rich oil chamber is communicated with the interior of the oil cup through the fuel passage; one end of the oil inlet passage is communicated with the rich oil chamber, and the other end is communicated with the metering chamber; one end of the starting passage is communicated with the rich oil chamber, and the other end is communicated with the mixing chamber; one end of the oil return passage is communicated with the interior of the oil cup, and the other end is connected to the oil tank; A duckbill valve is provided on the oil return passage, and the fuel passage and the oil return passage are separated by the duckbill valve, and the fuel in the oil cup is discharged into the fuel tank through the duckbill valve and the oil return passage; A pump force conduction channel is also provided in the body, one end of which is connected to the inside of the oil cup, and the other end is connected to the pump oil cavity. The pressure generated by pressing the oil cup is transmitted to the pump oil cavity through the pump force conduction channel to drive the pump oil diaphragm to move.

2. The carburetor rich oil simple starting device according to claim 1, characterized in that: A first check valve is installed in the oil inlet passage, and the first check valve is used to prevent the fuel in the oil-rich cavity from flowing into the metering chamber.

3. The rich oil simple starting device for a gasifier according to claim 1, characterized in that: A second check valve is installed in the starting passage, and the second check valve is used to prevent the fuel or air in the mixing chamber from entering the rich oil chamber.

4. The carburetor rich oil simple starting device according to claim 1, characterized in that: The main body is also provided with a pressure balance channel, one end of which is communicated with the starting channel, and the other end of which is communicated with the atmosphere.

5. The rich oil simple starting device for a gasifier according to claim 1, characterized in that: The main body is provided with a choke valve, and the choke valve is used to control the proportion of air entering the mixing chamber.

6. An engine starting system, comprising an engine and a carburetor fuel-rich simple starting device, wherein the carburetor fuel-rich simple starting device is connected to the engine, and is characterized in that: The gasifier oil-rich simple starting device adopts the gasifier oil-rich simple starting device according to any one of claims 1-5.

7. An engine starting method, the method is implemented based on the carburetor rich oil simple starting device of claim 1, the method comprising the following steps: Pressing the oil cup, the pressure generated by the oil cup is transmitted to the oil pump chamber, and drives the oil pump diaphragm to move, and under the action of the oil pump diaphragm, the fuel in the oil-rich chamber is sprayed into the mixing chamber in advance; and Pull the engine starter until the engine runs.

8. The method according to claim 7, characterized in that ,The steps of pressing the oil cup include: The oil cup is squeezed to generate positive pressure, which drives the oil pump diaphragm to move, so that the fuel in the oil-rich cavity is sprayed into the mixing chamber through the starting channel, and at the same time, the fuel in the oil cup enters the fuel tank through the oil return channel; and The oil cup is released to generate negative pressure, and the fuel in the metering chamber is sucked into the oil-rich cavity through the oil inlet passage. At the same time, the fuel in the oil-rich cavity is sucked into the oil cup through the fuel passage.

9. The engine starting method according to claim 7, characterized in that A first check valve is installed in the oil inlet channel, and a second check valve is installed in the starting channel; in the step of squeezing the oil cup, the first check valve is closed and the second check valve is opened.

10. The engine starting method according to claim 9, characterized in that: In the step of loosening the oil cup, the first check valve is opened and the second check valve is closed.

11. The engine starting method according to claim 7, characterized in that , the step of pressing the oil cup also includes: Close the choke.

Images