Fuel gas and fuel oil supply system

Abstract

A fuel gas and fuel oil supply system comprises a body, a throttle valve shaft, a mixing chamber and a gas inlet pipe, the throttle valve shaft, the mixing chamber and the gas inlet pipe are arranged on the body, and a fuel gas supply quantity adjusting mechanism is further arranged on the body. The gas door shaft comprises a door shaft body, a no-load gas hole and a gas amount adjusting groove, the no-load gas hole and the gas amount adjusting groove are formed in the door shaft body, the gas amount adjusting groove corresponds to the gas inlet pipe, and the no-load gas hole is located in the gas amount adjusting groove and is a through hole. The adjusting rocker arm is arranged corresponding to the throttle valve shaft and is connected with the gas valve shaft; a gas rotating control arm corresponding to the adjusting rocker arm is arranged on the throttle valve shaft, abuts against the adjusting rocker arm and pushes the adjusting rocker arm to drive the gas valve shaft to synchronously rotate so as to adjust the gas supply amount, and the combustible mixing ratio concentration of the engine under various working conditions is met; one end of the return tension spring is connected with the body, and the other end is connected with the adjusting rocker arm; and the return tension spring always tensions the adjusting rocker arm towards the closing direction.

Description

Technical Field

[0001] The present invention relates to gas and fuel supply technologies, and particularly to a gas and fuel supply system capable of adjusting the gas supply volume. Background Art

[0002] When the engine operates at medium and low loads, the throttle valve opening is small, the negative pressure is small, the amount of inhaled air is small, and the required combustible mixture is less; when the engine operates at medium and high loads, the throttle valve opening is large, the negative pressure is large, the amount of inhaled air is large, and the required combustible mixture is more. The existing gas supply system transports gas to the mixing chamber through a gas pipe with a fixed aperture. When the engine operates at medium and low loads, due to the positive pressure of the gas, sufficient gas is supplied and the amount of air is small, resulting in the problem of too rich a mixture; when the engine operates at medium and high loads, a large amount of air is inhaled, the aperture of the gas pipe is fixed, and the amount of inhalable gas is insufficient, resulting in the problem of too lean a mixture. This causes large scatter at each operating point of the engine, high matching difficulty, and unstable engine operation. For example, if the concentration is adjusted to be appropriate during medium and low load operation, the emissions will be too lean during medium and high load operation, and the engine will hunt; if the concentration is adjusted to be appropriate during medium and high load operation, the emissions will be too rich during medium and low load operation, and the engine will misfire. Simply adjusting the fixed aperture of the gas pipe cannot effectively balance and solve the problems of rich and lean mixtures during medium and low load operation and medium and high load operation of the engine. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a gas and fuel supply system capable of adjusting the gas supply volume in view of the above-mentioned defects of the prior art.

[0004] To achieve the above object, the present invention provides a gas and fuel supply system, including a body, a throttle valve shaft, a mixing chamber, and an intake pipe. The mixing chamber is provided on the body, and the throttle valve shaft and the intake pipe are respectively installed on the body corresponding to the mixing chamber. Among them, a gas supply volume adjustment mechanism is further provided on the body, and the gas supply volume adjustment mechanism includes:

[0005] A gas valve shaft, installed on the body corresponding to the intake pipe, and the aperture of the intake pipe is equal to the full-load aperture of the engine; the gas valve shaft includes a shaft main body and an idle gas hole and a gas volume adjustment groove provided on the shaft main body. The gas volume adjustment groove corresponds to the intake pipe, and the idle gas hole is located in the gas volume adjustment groove and is a through hole;

[0006] An adjustment rocker arm, provided corresponding to the throttle valve shaft and connected to the gas valve shaft; a gas rotation control arm is provided on the throttle valve shaft corresponding to the adjustment rocker arm. The gas rotation control arm abuts against the adjustment rocker arm and pushes the adjustment rocker arm to drive the gas valve shaft to rotate synchronously to adjust the gas supply volume and meet the combustible mixture ratio concentration at each operating condition of the engine; and

[0007] A return spring, one end of which is connected to the body, and the other end of the return spring is connected to the adjusting rocker arm; the return spring always pulls the adjusting rocker arm in the closing direction.

[0008] The above-mentioned gas and fuel supply system, wherein, further comprising:

[0009] An opening adjustment screw, which is installed on the adjusting rocker arm, and an opening adjustment screw stop post is correspondingly arranged on the body. By adjusting the pressing amount between the opening adjustment screw and the opening adjustment screw stop post, the initial opening angle of the gas valve shaft is adjusted.

[0010] The above-mentioned gas and fuel supply system, wherein an opening adjustment spring is further arranged on the opening adjustment screw, and both ends of the opening adjustment spring abut between the opening adjustment screw and the adjusting rocker arm.

[0011] The above-mentioned gas and fuel supply system, wherein the adjusting rocker arm includes a rocker arm body, the rocker arm body includes a first plane portion and a second plane portion that are perpendicular to each other, and a gas valve shaft mounting hole is arranged on the first plane portion; an opening adjustment screw hole and a return hook hole are arranged on the second plane portion; the return hook hole is located at one end of the second plane portion away from the first plane portion; the axes of the opening adjustment screw hole and the return hook hole are parallel to each other.

[0012] The above-mentioned gas and fuel supply system, wherein, further comprising:

[0013] An adjustment screw, which is installed on the adjusting rocker arm, and the end of the adjustment screw extends out of the adjusting rocker arm; by adjusting the length of the adjustment screw extending out of the adjusting rocker arm, the opening degree of the gas rotation control arm pushing the adjusting rocker arm to open is adjusted.

[0014] The above-mentioned gas and fuel supply system, wherein the maximum opening degree of the gas rotation control arm pushing the adjusting rocker arm to open is 90°.

[0015] The above-mentioned gas and fuel supply system, wherein the adjusting rocker arm includes a rocker arm body, the rocker arm body includes a first plane portion and a second plane portion that are perpendicular to each other, and a gas valve shaft mounting hole is arranged on the first plane portion; an adjustment screw hole, an opening adjustment screw hole and a return hook hole are arranged on the second plane portion, the adjustment screw hole is located at one end of the second plane portion close to the first plane portion, and the adjustment screw hole is higher than the opening adjustment screw hole; the return hook hole is located at one end of the second plane portion away from the first plane portion; the axes of the adjustment screw hole, the opening adjustment screw hole and the return hook hole are parallel to each other.

[0016] The above-mentioned gas and fuel supply system, wherein, further comprising:

[0017] The pressure plate, the pressure plate includes a pressure plate main body and a gas door shaft mounting hole and a pressure plate fixing screw mounting hole provided on the pressure plate main body, a pressure plate positioning groove is correspondingly provided on the main body, and the gas door shaft mounting hole is sleeved on the gas door shaft and correctly installed into the pressure plate positioning groove.

[0018] The above-mentioned gas and fuel supply system, wherein, a rocker arm fixing boss and a rocker arm fixing screw hole are provided at the top of the door shaft main body; a leak-proof sealing boss is provided at the upper part of the door shaft main body, and a sealing ring hole is correspondingly provided on the main body.

[0019] The above-mentioned gas and fuel supply system, wherein, the throttle valve shaft includes a throttle valve shaft body and a throttle valve rocker arm, the throttle valve rocker arm is provided at the top of the throttle valve shaft body, and the gas rotation control arm is provided at the lower end of the throttle valve rocker arm and extends outward along a direction perpendicular to the axis of the throttle valve shaft body.

[0020] The technical effect of the present invention is as follows:

[0021] The present invention sets the intake pipe to the aperture required for the full load of the engine. By rotating the throttle valve shaft, the gas rotation control arm is driven to push the adjustment rocker arm to rotate, thereby driving the gas door shaft to rotate synchronously, adjusting the opening degree of the no-load gas hole on the gas door shaft. Cooperating with the adjusting screw and the opening degree adjusting screw, the gas supply amount can be flexibly adjusted according to the requirements of each working condition of the engine, realizing the corresponding adjustment of the concentration of the combustible mixture ratio at different working conditions of the engine, and finally achieving that the engine can be in the best state during operation at each working condition point, with smooth and stable operation.

[0022] The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments, but it is not a limitation to the present invention. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of an embodiment of the present invention;

[0024] Figure 2 It is a schematic structural diagram of the main body of an embodiment of the present invention;

[0025] Figure 3 It is a schematic structural diagram of the return spring of an embodiment of the present invention;

[0026] Figure 4 It is a schematic structural diagram of another embodiment of the present invention;

[0027] Figure 5 It is Figure 4 a partial sectional structural diagram of;

[0028] Figure 6 It is a schematic structural diagram of the adjustment rocker arm of an embodiment of the present invention;

[0029] Figure 7 Schematic diagram of the adjusting rocker arm structure according to another embodiment of the present invention;

[0030] Figure 8 Schematic diagram of the throttle valve shaft structure according to an embodiment of the present invention;

[0031] Figure 9 Schematic diagram of the gas valve shaft structure according to an embodiment of the present invention;

[0032] Figure 10 Schematic diagram of the pressing plate structure according to an embodiment of the present invention.

[0033] Among them, the reference numerals

[0034] 1 body

[0035] 11 throttle valve shaft hole

[0036] 12 gas valve shaft hole

[0037] 13 seal ring hole

[0038] 14 intake pipe hole

[0039] 15 spring hanging column

[0040] 16 opening adjustment screw stop column

[0041] 17 pressing plate positioning groove

[0042] 18 pressing plate screw hole

[0043] 2 mixing chamber

[0044] 3 throttle valve shaft

[0045] 31 throttle valve rocker

[0046] 32 gas rotating control arm

[0047] 33 throttle valve shaft body

[0048] 34 throttle valve screw hole

[0049] 35 throttle valve groove

[0050] 4 throttle valve piece

[0051] 5 intake pipe

[0052] 6 gas supply amount adjusting mechanism

[0053] 61 gas valve shaft

[0054] 611 valve shaft main body

[0055] 612 anti-leakage sealing boss

[0056] 613 no-load gas hole

[0057] 614 Gas volume adjustment groove

[0058] 615 Rocker arm fixing screw hole

[0059] 616 Rocker arm fixing boss

[0060] 617 Anti-leakage sealing ring

[0061] 62 Adjusting rocker arm

[0062] 621 Rocker arm body

[0063] 622 Adjusting screw hole

[0064] 623 Opening degree adjusting screw hole

[0065] 624 Return hook hole

[0066] 625 Gas door shaft installation hole

[0067] 626 First plane part

[0068] 627 Second plane part

[0069] 63 Pressure plate

[0070] 631 Gas door shaft installation hole

[0071] 632 Pressure plate body

[0072] 633 Pressure plate fixing screw installation hole

[0073] 64 Return spring

[0074] 641 Return fixing hole

[0075] 642 Return tension body

[0076] 643 Return hook

[0077] 65 Opening degree adjusting screw

[0078] 651 Opening degree adjusting spring

[0079] 66 Adjusting screw

[0080] 661 Adjusting spring Detailed implementation manners

[0081] The structural principle and working principle of the present invention will be specifically described below with reference to the accompanying drawings:

[0082] See Figures 1 - 3 , Figure 1 which is a structural schematic diagram of an embodiment of the present invention, Figure 2 and Figure 3Schematic structural diagram of the return spring 64 according to an embodiment of the present invention. The gas and fuel supply system of the present invention includes a body 1, a throttle shaft 3, a mixing chamber 2, and an intake pipe 5. The mixing chamber 2 is provided on the body 1, and the throttle shaft 3 and the intake pipe 5 are respectively installed on the body 1 corresponding to the mixing chamber 2. The composition, structure, mutual positional relationship, connection relationship, and functions of other parts of the gas and fuel supply system are all relatively mature prior arts and will not be elaborated here. Only the composition and structure of the present application different from the prior art will be described in detail below. The main difference between this gas and fuel supply system and the prior art is that a gas supply amount adjusting mechanism 6 is further provided on the body 1. The gas supply amount adjusting mechanism 6 includes: a gas valve shaft 61, which is installed on the body 1 corresponding to the intake pipe 5; the gas valve shaft 61 includes a shaft main body 611 and an idle gas hole 613 and a gas amount adjusting groove 614 provided on the shaft main body 611. The gas amount adjusting groove 614 is provided corresponding to the intake pipe 5, and the idle gas hole 613 is located in the gas amount adjusting groove 614. The aperture of the intake pipe 5 is equal to the aperture of the engine at full load; an adjusting rocker 62, which is provided corresponding to the throttle shaft 3 and is connected to the gas valve shaft 61; a gas rotation control arm 32 is provided on the throttle shaft 3 corresponding to the adjusting rocker 62. The gas rotation control arm 32 abuts against the adjusting rocker 62, and as the throttle shaft 3 rotates, the gas rotation control arm 32 pushes the adjusting rocker 62 to drive the gas valve shaft 61 to rotate synchronously to adjust the gas supply amount and meet the combustible mixture ratio concentration of each working condition of the engine; and a return spring 64, which includes a return tension main body 642 and return fixing holes 641 and return hooks 643 provided at both ends of the return tension main body 642. One end of the return spring 64 is connected to the body 1, and the other end of the return spring 64 is connected to the adjusting rocker 62; the return spring 64 always pulls the adjusting rocker 62 in the closing direction.

[0083] See Figure 4 and Figure 5 , Figure 4 Schematic structural diagram of another embodiment of the present invention, Figure 5 is Figure 4 Partial cross-sectional structural diagram of. In this embodiment, an opening degree adjusting screw 65 is further included, which is installed on the adjusting rocker 62. An opening degree adjusting screw stop post 16 is correspondingly provided on the body 1. By adjusting the pressing amount between the opening degree adjusting screw 65 and the opening degree adjusting screw stop post 16, the initial opening angle of the gas valve shaft 61 is adjusted. Among them, an opening degree adjusting spring 651 is further provided on the opening degree adjusting screw 65, and both ends of the opening degree adjusting spring 651 abut between the opening degree adjusting screw 65 and the adjusting rocker 62.

[0084] See Figure 6 ,Figure 6 Schematic structural diagram of the adjusting rocker arm 62 according to an embodiment of the present invention. In this embodiment, the adjusting rocker arm 62 includes a rocker arm main body 621, and the rocker arm main body 621 includes a first planar portion 626 and a second planar portion 627 that are perpendicular to each other. A gas door shaft mounting hole 625 is provided on the first planar portion 626; an opening adjustment screw hole 623 and a return hook hole 624 are provided on the second planar portion 627; the return hook hole 624 is located at one end of the second planar portion 627 away from the first planar portion 626; the axes of the opening adjustment screw hole 623 and the return hook hole 624 are parallel to each other.

[0085] This embodiment may further include an adjustment screw 66, which is installed on the adjusting rocker arm 62, and the end of the adjustment screw 66 extends outside the adjusting rocker arm 62; by adjusting the length of the adjustment screw 66 extending outside the adjusting rocker arm 62, the opening degree of the gas rotation control arm 32 pushing the adjusting rocker arm 62 to open can be adjusted. Wherein, the maximum opening degree of the gas rotation control arm 32 pushing the adjusting rocker arm 62 to open is 90°. An adjustment spring 661 may also be provided on the adjustment screw 66, which is sleeved on the adjustment screw 66, and the two ends are respectively abutted against the adjustment screw 66 and the adjusting rocker arm 62.

[0086] See Figure 7 , Figure 7 Schematic structural diagram of the adjusting rocker arm 62 according to another embodiment of the present invention. The adjusting rocker arm 62 in this embodiment includes a rocker arm main body 621, and the rocker arm main body 621 includes a first planar portion 626 and a second planar portion 627 that are perpendicular to each other. A gas door shaft mounting hole 625 is provided on the first planar portion 626; an adjustment screw hole 622, an opening adjustment screw hole 623 and a return hook hole 624 are provided on the second planar portion 627. The adjustment screw hole 622 is located at one end of the second planar portion 627 close to the first planar portion 626, and the adjustment screw hole 622 is higher than the opening adjustment screw hole 623; the return hook hole 624 is located at one end of the second planar portion 627 away from the first planar portion 626; the axes of the adjustment screw hole 622, the opening adjustment screw hole 623 and the return hook hole 624 are parallel to each other.

[0087] See Figure 8 , Figure 8Schematic structural diagram of the throttle shaft 3 according to an embodiment of the present invention. The throttle shaft 3 includes a throttle shaft body 33, a throttle rocker arm 31, and a gas rotation control arm 32. The throttle rocker arm 31 is disposed at the top end of the throttle shaft body 33, and the gas rotation control arm 32 is disposed at the lower end of the throttle rocker arm 31 and extends outward in a direction perpendicular to the axis of the throttle shaft body 33. A throttle groove 35 and a throttle screw hole 34 are provided on the throttle shaft body 33, and a throttle plate 4 is installed in the throttle groove 35 and fixed to the throttle screw hole 34 by a screw.

[0088] See Figure 9 , Figure 9 Schematic structural diagram of the gas throttle shaft 61 according to an embodiment of the present invention. At the top end of the shaft body 611 of this embodiment, a rocker arm fixing boss 616 and a rocker arm fixing screw hole 615 are provided; an anti-leakage sealing boss 612 is provided on the upper part of the shaft body 611, and a sealing ring hole 13 is correspondingly provided on the body 1. The gas volume adjustment groove 614 is a flat groove structure, symmetrically disposed on both sides of the shaft body 611 with respect to the axis of the shaft body 611. The no-load gas hole 613 is provided at the middle position of the gas volume adjustment groove 614 and penetrates through the gas volume adjustment groove 614. The center line of the no-load gas hole 613 is perpendicular to the axis of the shaft body 611 and lies in the same plane.

[0089] See Figure 10 , Figure 10 Schematic structural diagram of the pressing plate 63 according to an embodiment of the present invention. In this embodiment, a pressing plate 63 is further included. The pressing plate 63 includes a pressing plate body 632, a gas throttle shaft mounting hole 631, and a pressing plate fixing screw mounting hole 633 provided on the pressing plate body 632. A pressing plate positioning groove 17 is correspondingly provided on the body 1. The gas throttle shaft mounting hole 631 is sleeved on the gas throttle shaft 61 and correctly installed into the pressing plate positioning groove 17, and locked to the body 1 through a screw and the pressing plate fixing screw mounting hole 633.

[0090] In an embodiment of the present invention, the throttle shaft 3 is inserted into the throttle shaft hole 11, the throttle plate 4 is inserted into the throttle groove 35, and is fixed by screwing to the throttle screw hole 34; the intake pipe 5 is press-fitted into the intake pipe hole 14; the gas valve shaft 61 is inserted into the gas valve shaft hole 12; the leak-proof sealing ring 617 is sleeved on the leak-proof sealing boss 612 of the gas valve shaft 61; the gas valve shaft mounting hole 631 of the pressure plate 63 is sleeved on the gas valve shaft 61, aligned with the pressure plate positioning groove 17, and fixed to the pressure plate screw hole 18 of the body 1 by passing a fixing screw through the pressure plate fixing screw mounting hole 633; the gas valve shaft mounting hole 625 of the adjusting rocker arm 62 is sleeved on the rocker arm fixing boss 616 of the gas valve shaft 61, with a rocker arm fixing gasket placed on it, and is locked to the rocker arm fixing screw hole 615 by a fixing screw; the adjusting screw 66 is sleeved with an adjusting spring 661 and locked to the adjusting screw hole 622 of the adjusting rocker arm 62; the opening adjusting screw 65 is sleeved with an opening adjusting spring 651 and locked to the opening adjusting screw hole 623 of the adjusting rocker arm 62; the return hook 643 of the return spring 64 is hooked on the return hook hole 624 of the adjusting rocker arm 62, and the return fixing hole 641 is sleeved on the spring hanging column 15 of the body 1. The return spring 64 pulls the adjusting rocker arm 62 to always be under force in the closing direction, and the adjusting rocker arm 62 drives the gas valve shaft 61 to rotate synchronously. According to the engine matching condition, adjust the amount of the opening adjusting screw 65 pressing against the opening adjusting screw stop column 16 of the body 1 to make the initial opening angle of the gas valve shaft 61 appropriate to meet the operation performance requirements of the engine under medium and low loads. According to the engine matching condition, adjust the length of the adjusting screw 66 locked on the adjusting rocker arm 62 and extending out of the adjusting screw hole 622 to make the gas rotation control arm 32 of the throttle shaft 3 start to open the control of the adjusting rocker arm 62 at an appropriate angle until it is opened to 90°, to meet the operation performance requirements of the engine under medium and high loads. By adjusting the opening size of the no-load gas hole 613 on the gas valve shaft 61, in cooperation with the adjusting screw 66 and the opening adjusting screw 65, the gas supply amount of the engine can be further refined and adjusted, so as to achieve the stable operation and emission optimization of the engine at each operating condition point.

[0091] In the present invention, the intake pipe 5 is set to the aperture required for the full load of the engine. By rotating the throttle shaft 3, the gas rotation control arm 32 is driven to push the adjusting rocker arm 62 to rotate, thereby driving the gas valve shaft 61 to rotate synchronously, and adjusting the opening size of the no-load gas hole 613 on the gas valve shaft 61. In cooperation with the adjusting screw 66 and the opening adjusting screw 65, the gas supply amount can be flexibly adjusted according to the requirements of each operating condition of the engine, so as to achieve the corresponding adjustment of the concentration of the combustible mixture ratio when the engine is in different operating conditions, and finally make the engine reach the best state during operation at each operating condition point, with smooth and stable operation.

[0092] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention. However, these corresponding changes and modifications should fall within the protection scope of the appended claims of the present invention.

Claims

1. A gas and fuel supply system, comprising a body, a throttle shaft, a mixing chamber and an intake pipe. The mixing chamber is arranged on the body, and the throttle shaft and the intake pipe are respectively installed on the body corresponding to the mixing chamber. It is characterized in that, A gas supply amount adjusting mechanism is further provided on the body, and the gas supply amount adjusting mechanism includes: A gas gate shaft, which is installed on the body corresponding to the air inlet pipe, and the aperture of the air inlet pipe is equal to the full-load aperture of the engine; the gas gate shaft includes a shaft main body and an idle gas hole and a gas amount adjusting groove provided on the shaft main body, the gas amount adjusting groove corresponds to the air inlet pipe, and the idle gas hole is located in the gas amount adjusting groove and is a through hole; An adjusting rocker arm, which is arranged corresponding to the throttle shaft and is connected to the gas gate shaft; a gas rotation control arm is arranged on the throttle shaft corresponding to the adjusting rocker arm, the gas rotation control arm abuts against the adjusting rocker arm, and pushes the adjusting rocker arm to drive the gas gate shaft to rotate synchronously to adjust the gas supply amount and meet the combustible mixture concentration of each working condition of the engine; and A return tension spring, one end of which is connected to the body, and the other end of the return tension spring is connected to the adjusting rocker arm; the return tension spring always pulls the adjusting rocker arm in the closing direction.

2. The gas and fuel supply system according to claim 1, characterized in that, It further includes: An opening degree adjusting screw, which is installed on the adjusting rocker arm, and an opening degree adjusting screw stop post is correspondingly arranged on the body. By adjusting the pressing amount of the opening degree adjusting screw against the opening degree adjusting screw stop post, the initial opening angle of the gas gate shaft is adjusted.

3. The fuel gas supply system according to claim 2, characterized in that, An opening degree adjusting spring is further arranged on the opening degree adjusting screw, and both ends of the opening degree adjusting spring abut between the opening degree adjusting screw and the adjusting rocker arm.

4. The fuel gas supply system according to claim 2, wherein The adjusting rocker arm includes a rocker arm main body, and the rocker arm main body includes a first plane part and a second plane part that are perpendicular to each other. The first plane part is provided with a gas gate shaft installation hole; the second plane part is provided with an opening degree adjusting screw hole and a return hook hole; the return hook hole is located at one end of the second plane part far from the first plane part; the axes of the opening degree adjusting screw hole and the return hook hole are parallel to each other.

5. The gas and fuel supply system according to claim 1, characterized in that, It further includes: An adjusting screw, which is installed on the adjusting rocker arm, and the end of the adjusting screw extends outside the adjusting rocker arm; by adjusting the length of the adjusting screw extending outside the adjusting rocker arm, the opening degree of the adjusting rocker arm pushed by the gas rotation control arm is adjusted.

6. The gas and fuel supply system according to claim 5, characterized in that, The maximum opening degree of the adjusting rocker arm pushed by the gas rotation control arm is 90°.

7. The fuel gas supply system according to claim 5, characterized in that, The adjusting rocker arm includes a rocker arm main body, and the rocker arm main body includes a first plane part and a second plane part that are perpendicular to each other. The first plane part is provided with a gas gate shaft installation hole; the second plane part is provided with an adjusting screw hole, an opening degree adjusting screw hole and a return hook hole. The adjusting screw hole is located at one end of the second plane part close to the first plane part, and the adjusting screw hole is higher than the opening degree adjusting screw hole; the return hook hole is located at one end of the second plane part far from the first plane part; the axes of the adjusting screw hole, the opening degree adjusting screw hole and the return hook hole are parallel to each other.

8. The fuel gas supply system according to claim 1, characterized in that It further includes: A pressing plate, the pressing plate includes a pressing plate main body and a gas gate shaft installation hole and a pressing plate fixing screw installation hole provided on the pressing plate main body. A pressing plate positioning groove is correspondingly arranged on the body, and the gas gate shaft installation hole is sleeved on the gas gate shaft and is correctly installed into the pressing plate positioning groove.

9. The fuel gas supply system according to claim 1, wherein A rocker arm fixing boss and a rocker arm fixing screw hole are provided at the top of the door shaft main body; an anti-leakage sealing boss is provided at the upper part of the door shaft main body, and a sealing ring hole is correspondingly provided on the main body.

10. The gas and fuel supply system according to claim 1, characterized in that, The throttle valve shaft includes a throttle shaft body and a throttle rocker arm. The throttle rocker arm is arranged at the top of the throttle shaft body. The gas rotation control arm is arranged at the lower end of the throttle rocker arm and extends outward along a direction perpendicular to the axis of the throttle shaft body.

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