阅读说明：本技术 一种单缸风冷柴油机的调速机构 (Speed regulating mechanism of single-cylinder air-cooled diesel engine ) 是由 张巍 杨慧明 王殿双 程聪 费吴凯 赵飞 刘晓庆 于 2021-09-23 设计创作，主要内容包括：本发明涉及发动机技术领域,具体公开了一种单缸风冷柴油机的调速机构,包括限位弹簧、限位销、拉杆停供挡钉、拉杆停供挡钉螺母、偏心轴限位板、外齿锁紧垫圈、可调限位座、供油杠杆螺母、内锯齿锁紧垫圈、供油杠杆、限位板扭簧、扇形板调节螺钉螺母、铜垫片、扇形板调节螺钉、法兰连接a轴、连接杆、开口挡圈、扇形板、平垫圈、DK轴用挡卡、偏心轴、曲轴箱,并且,对内部各个零部件进行重新设计安装,本发明结构紧凑、调速效果具备良好的多变性、稳定性和加速性,采用杠杆扇形板油量校正系统,可以对各种工作状态下的最大油量进行合理限制,具备高速调整性能,在试验维修过程中方便微调高速状态。(The invention relates to the technical field of engines, and particularly discloses a speed regulating mechanism of a single-cylinder air-cooled diesel engine, which comprises a limiting spring, a limiting pin, a pull rod stop-supply stop nail nut, an eccentric shaft limiting plate, an external tooth locking washer, an adjustable limiting seat, an oil supply lever nut, an internal sawtooth locking washer, an oil supply lever, a limiting plate torsional spring, a sector plate adjusting screw nut, a copper gasket, a sector plate adjusting screw, a flange connection a shaft, a connecting rod, an open retainer ring, a sector plate, a flat washer, a DK shaft stop clamp, an eccentric shaft and a crankcase, wherein each internal part is redesigned and installed. The high-speed state is convenient to finely adjust in the test maintenance process.)

1. A speed regulating mechanism of a single-cylinder air-cooled diesel engine is characterized in that: the device comprises a limiting spring, a limiting pin, a pull rod stop-supply blocking nail nut, an eccentric shaft limiting plate, an external tooth locking washer, an adjustable limiting seat, an oil supply lever nut, an internal sawtooth locking washer, an oil supply lever, a limiting plate torsional spring, a sector plate adjusting screw nut, a copper gasket, a sector plate adjusting screw, a flange connection a shaft, a connecting rod, a split washer, a sector plate, a flat washer, a DK shaft stop clamp, an eccentric shaft and a crankcase;

the limiting spring is arranged in the pin hole of the crankcase, the limiting pin is arranged on the limiting spring, the pull rod stops supplying a stop nail and a pull rod stops supplying a stop nail nut to be arranged on the lower side of the limiting pin together, the adjustable limiting seat, the external tooth locking washer and the pull rod stop supplying the stop nail nut are arranged on the eccentric shaft limiting plate, the internal sawtooth locking washer and the oil supply lever nut lock the oil supply lever on the crankcase, a limiting plate torsional spring is arranged between the oil supply lever and the crankcase, the eccentric shaft passes through a sleeve hole on the crankcase shaft and is used for providing elastic force for accelerator adjustment, when the rotation angle of the oil supply lever, the eccentric shaft is driven to rotate to play a role of adjusting the size of an accelerator, the sector plate adjusting screw penetrates through a bolt hole on the crankcase, and the copper gasket and the sector plate adjusting screw nut are locked on the sector plate adjusting screw, the sector plate is arranged at the other end of the sector plate adjusting screw, the two flat gaskets and the DK shaft are fixed by the baffle clamp, the distance between the sector plate adjusting screw and the initial position of the mounting surface of the crankcase needs to be ensured to be 7-9mm after the sector plate adjusting screw is mounted, the flange connection shaft a passes through one end of the connecting rod and is fixed by the split retainer ring, and the other end of the connecting rod is connected with the flange connection shaft b and is fixed by the split retainer ring.

2. The governor mechanism of the single-cylinder air-cooled diesel engine according to claim 1, wherein: be equipped with on the crankcase axle sleeve and adjust pole stud nut, adjust pole stud with it adjusts the pole antifriction pad to be equipped with between the pole stud nut, adjust the hole that pole stud's the other end passes through the oil mass adjusting lever to it is fixed with two locking formula hexagonal thin nuts, the hole of oil mass adjusting lever with be provided with between two locking formula hexagonal thin nuts and adjust the pole antifriction pad, adjust pole stud's nut lower extreme with the bush upper end of oil mass adjusting lever needs to keep 1.1 ~ 1.2 mm's free range.

3. The governor mechanism of the single-cylinder air-cooled diesel engine as set forth in claim 2, wherein: the oil quantity adjusting device is characterized in that a forked shaft is fixed above the oil quantity adjusting rod through a forked shaft nut, a flat washer is arranged between the forked shaft nut and the oil quantity adjusting rod, a clamping groove is formed in the oil quantity adjusting rod and used for connecting a rotating pin of a high-pressure oil pump, the eccentric shaft passes through a crankcase shaft sleeve hole and penetrates through the oil supply adjusting rod and the starting thickening pull rod, a conical return spring is fixed at one end of the eccentric shaft, the other end of the eccentric shaft penetrates through a round hole of the oil supply adjusting rod and is fixed, an adjusting rod pin shaft is fixed at one end of the oil supply lever in an interference mode, the oil supply lever penetrates through the clamping groove of the forked shaft, an eccentric shaft O-shaped ring and an open check ring are arranged on the eccentric shaft, the eccentric shaft O-shaped ring and a shaft sleeve in the crankcase are in interference sealing, and the open check ring is used for limiting the eccentric shaft to move outwards.

4. The governor mechanism of the single cylinder air-cooled diesel engine according to claim 3, wherein: the utility model discloses a concentrated pull rod of starting, including the start-up thickening pull rod, start the thickening pull rod and be fixed with hexagon socket flat end holding screw through hexagon socket thin nut, just, hexagon socket flat end holding screw's tip is 19mm with the planar initial distance of hexagon thin nut, the fuel feeding adjusting lever has the adjusting lever swivel nut through threaded fixation, be equipped with the flange push rod on the adjusting lever swivel nut, the fuel feeding adjusting lever with start fixedly connected with speed governing extension spring between the thickening pull rod, be equipped with parking buffer screw, light spring packing ring, parking buffer screw nut, high-speed adjusting screw and high-speed adjusting screw nut on the fuel feeding lever.

Technical Field

The invention relates to the technical field of engines, and particularly discloses a speed regulating mechanism of a single-cylinder air-cooled diesel engine.

Background

The mechanical speed regulating mechanism of the diesel engine is obtained by changing the circulating fuel injection quantity under different rotating speeds and loads by changing the fuel quantity regulating mechanism, and supplies a certain fuel quantity to the diesel engine under a certain external load condition, so that the power generated by the diesel engine is balanced with the external load, and the diesel engine stably runs at a certain rotating speed. For an auxiliary diesel engine used by a special vehicle, the using environment is a vehicle, namely the highest speed, the process of idling and medium speed is not needed, and the highest output power required by different using environments is different, so that the diesel engine needs to be very stable under the condition of the highest rotating speed, and the range of the highest rotating speed can be changed.

Disclosure of Invention

The invention provides a speed regulating mechanism of a single-cylinder air-cooled diesel engine aiming at the prior art, which can finely regulate and fix the highest rotating speed and can also regulate the range of the highest rotating speed.

The technical scheme adopted by the invention for solving the problems is as follows:

the invention provides a speed regulating mechanism of a single-cylinder air-cooled diesel engine, which comprises a limiting spring, a limiting pin, a pull rod stop-supply stop nail nut, an eccentric shaft limiting plate, an external tooth locking washer, an adjustable limiting seat, an oil supply lever nut, an internal sawtooth locking washer, an oil supply lever, a limiting plate torsion spring, a sector plate adjusting screw nut, a copper gasket, a sector plate adjusting screw, a flange connection a shaft, a connecting rod, an open retainer ring, a sector plate, a flat washer, a DK shaft stop clamp, an eccentric shaft and a crankcase, wherein the pull rod stop-supply stop nail is arranged on the eccentric shaft limiting plate;

the limiting spring is arranged in the pin hole of the crankcase, the limiting pin is arranged on the limiting spring, the pull rod stops supplying a stop nail and a pull rod stops supplying a stop nail nut to be arranged on the lower side of the limiting pin together, the adjustable limiting seat, the external tooth locking washer and the pull rod stop supplying the stop nail nut are arranged on the eccentric shaft limiting plate, the internal sawtooth locking washer and the oil supply lever nut lock the oil supply lever on the crankcase, a limiting plate torsional spring is arranged between the oil supply lever and the crankcase, the eccentric shaft passes through a sleeve hole on the crankcase shaft and is used for providing elastic force for accelerator adjustment, when the rotation angle of the oil supply lever, the eccentric shaft is driven to rotate to play a role of adjusting the size of an accelerator, the sector plate adjusting screw penetrates through a bolt hole on the crankcase, and the copper gasket and the sector plate adjusting screw nut are locked on the sector plate adjusting screw, the sector plate is arranged at the other end of the sector plate adjusting screw, the two flat gaskets and the DK shaft are fixed by the baffle clamp, the distance between the sector plate adjusting screw and the initial position of the mounting surface of the crankcase needs to be ensured to be 7-9mm after the sector plate adjusting screw is mounted, the flange connection shaft a passes through one end of the connecting rod and is fixed by the split retainer ring, and the other end of the connecting rod is connected with the flange connection shaft b and is fixed by the split retainer ring.

Further, be equipped with on the crankcase axle sleeve and adjust pole stud nut, adjust pole stud with it adjusts the pole antifriction pad to be equipped with between the pole stud nut, the other end of adjusting pole stud passes through the hole of oil mass adjusting pole to it is fixed with two locking formula hexagonal thin nuts, the hole of oil mass adjusting pole with be provided with between two locking formula hexagonal thin nuts and adjust the pole antifriction pad, adjust pole stud the nut lower extreme with the bush upper end of oil mass adjusting pole needs to keep 1.1 ~ 1.2 mm's free range.

Furthermore, a forked shaft is fixed above the oil quantity adjusting rod through a forked shaft nut, a flat washer is arranged between the forked shaft nut and the oil quantity adjusting rod, and the oil quantity adjusting rod is provided with a clamping groove for connecting a rotating pin of a high-pressure oil pump, the eccentric shaft passes through the crankcase shaft sleeve hole, and the eccentric shaft passes through the oil supply adjusting rod and the starting thickening pull rod, one end of the eccentric shaft is fixed with a conical return spring, the other end of the eccentric shaft passes through a round hole of the oil supply adjusting rod to be fixed, one end of the oil supply lever is fixed with an adjusting rod pin shaft in an interference manner, the oil supply lever penetrates through the clamping groove of the forked shaft, the eccentric shaft is provided with an eccentric shaft O-shaped ring and an open retainer ring, the eccentric shaft O-shaped ring and the shaft sleeve in the crankcase are in interference seal, and the split retainer ring is used for limiting the eccentric shaft to move outwards.

Further, it is fixed with hexagon socket head cap flat end holding screw to start the enrichment pull rod through hexagon socket head cap nut, just, hexagon socket head cap flat end holding screw's tip is 19mm with the planar initial distance of hexagon nut, the fuel feeding adjusting lever has the adjusting lever swivel nut through the threaded fixation, be equipped with the flange push rod on the adjusting lever swivel nut, the fuel feeding adjusting lever with start fixedly connected with speed governing extension spring between the enrichment pull rod, be equipped with parking buffer screw, light spring packing ring, parking buffer screw nut, high-speed adjusting screw and high-speed adjusting screw nut on the fuel feeding lever.

The invention has the advantages and positive effects that:

1. the speed regulation effect has good variability, stability and acceleration.

2. The maximum oil quantity under various working states can be reasonably limited by adopting the lever fan-shaped plate oil quantity correction system.

3. The device has high-speed adjustment performance, and is convenient to finely adjust the high-speed state in the test maintenance process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a front cross-sectional view of a governor mechanism of a single cylinder air-cooled diesel engine of the present invention;

FIG. 2 is a partial sectional view of the front side of the governor mechanism of the single cylinder air-cooled diesel engine of the present invention;

FIG. 3 is a cross-sectional view taken at A in FIG. 1;

FIG. 4 is a cross-sectional view taken at B in FIG. 2;

FIG. 5 is a first perspective view of a governor mechanism of a single cylinder air-cooled diesel engine of the present invention;

FIG. 6 is a second perspective view of a governor mechanism of a single cylinder air-cooled diesel engine of the present invention;

FIG. 7 is a schematic diagram of a limiting plate structure of an eccentric shaft in the speed regulating mechanism of the single-cylinder air-cooled diesel engine according to the present invention;

FIG. 8 is a schematic diagram of an oil mass adjusting lever of the speed adjusting mechanism of the single cylinder air-cooled diesel engine according to the present invention;

FIG. 9 is a diagram of the load characteristic (exhaust temperature) of the diesel engine in the speed regulating mechanism of the single cylinder air-cooled diesel engine according to the present invention.

In the drawings are labeled: 1-limiting spring, 2-limiting pin, 3-pull rod stop and supply retaining nail, 4-pull rod stop and supply retaining nail nut, 5-eccentric shaft limiting plate, 6-external tooth locking washer, 7-adjustable limiting seat, 8-oil supply lever nut, 9-internal sawtooth locking washer, 10-oil supply lever, 11-limiting plate torsion spring, 12-sector plate adjusting screw nut, 13-copper gasket, 14-sector plate adjusting screw, 15-flange connection a shaft, 16-connecting rod, 17-open retainer ring, 18-sector plate, 19-flat washer, 20-DK shaft retaining clip, 21-adjusting rod stud, 22-adjusting rod stud nut, 23-adjusting rod antifriction pad, 24-two locking hexagonal thin nuts, 25-forked shaft nut, 26-an oil quantity adjusting rod, 27-an adjusting rod pin shaft, 28-a fork-shaped shaft, 29-an oil supply adjusting rod, 30-an eccentric shaft, 31-a conical return spring, 32-a starting thickening pull rod, 33-an opening retainer ring, 34-an eccentric shaft O-shaped ring, 35-a flange connecting b shaft, 36-an inner hexagonal flat end fastening screw, 37-a hexagonal thin nut, 38-an adjusting rod screw sleeve, 39-a flange push rod, 40-a speed regulating tension spring, 41-a parking buffer screw, 42-a parking buffer screw nut, 43-a light spring washer, 44-a high-speed adjusting screw, 45-a high-speed adjusting screw nut, 46-a high-pressure oil pump and 47-a crankcase.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to the attached drawings 1-8 of the specification, the speed regulating mechanism of the single-cylinder air-cooled diesel engine comprises a limiting spring 1, a limiting pin 2, a pull rod stop-supply stop nail 3, a pull rod stop-supply stop nail nut 4, an eccentric shaft limiting plate 5, an external tooth locking washer 6, an adjustable limiting seat 7, an oil supply lever nut 8, an internal sawtooth locking washer 9, an oil supply lever 10, a limiting plate torsion spring 11, a sector plate adjusting screw nut 12, a copper gasket 13, a sector plate adjusting screw 14, a flange connection a shaft 15, a connecting rod 16, an open retainer ring 17, a sector plate 18, a flat washer 19, a DK shaft stop clamp 20, an eccentric shaft 30 and a crankcase 47;

the limiting spring 1 is arranged in a pin hole of the crankcase 47, the limiting pin 2 is arranged on the limiting spring 1, the pull rod stops supplying the stop nail 3 and the pull rod stops supplying the stop nail nut 4 to be arranged at the lower side of the limiting pin 2 together, the adjustable limiting seat 7, the external tooth locking washer 6 and the pull rod stop supplying the stop nail nut 4 to be arranged on the eccentric shaft limiting plate 5, the oil supply lever 10 is locked on the crankcase 47 by the internal sawtooth locking washer 9 and the oil supply lever nut 8, a limiting plate torsion spring 11 is arranged between the oil supply lever 10 and the crankcase 47, the eccentric shaft 30 passes through a sleeve hole on the shaft of the crankcase 47 and is used for providing elastic force for throttle adjustment, and when the oil supply lever 10 rotates, the eccentric shaft 30 is driven to rotate to play a role of adjusting the size of a throttle, and the sector plate adjusting screw 14 passes through a bolt hole on the crankcase 47, the copper gasket 13 and the sector plate adjusting screw nut 12 are locked on the sector plate adjusting screw 14, the sector plate 18 is arranged at the other end of the sector plate adjusting screw 14, the two flat washers 19 and the DK shaft are fixed by the stop clamp 20, the distance between the installed sector plate adjusting screw 14 and the initial position of the installation surface of the crankcase 47 needs to be 7-9mm, the flange connection a shaft 15 passes through one end of the connecting rod 16 and is fixed by the split retainer 17, and the other end of the connecting rod 16 is connected with the flange connection b shaft 35 and is fixed by the split retainer 17.

As a preferred embodiment of this embodiment, be equipped with on the axle sleeve of crankcase 47 and adjust pole stud 22 and adjust pole stud nut 21, adjust pole stud 22 with it adjusts pole antifriction pad 23 to be equipped with between the pole stud nut 21, adjust the hole that pole stud 22's the other end passes through oil mass adjusting rod 26 to it is fixed with two locking formula hexagonal thin nuts 24, the hole of oil mass adjusting rod 26 with be provided with between two locking formula hexagonal thin nuts 24 and adjust pole antifriction pad 23, adjust pole stud 21 the nut lower extreme with oil mass adjusting rod 26's bush upper end needs to keep 1.1 ~ 1.2 mm's home distance.

As another preferred embodiment of this embodiment, a forked shaft 28 is fixed above the oil amount adjusting rod 26 through a forked shaft nut 25, a flat washer 19 is arranged between the forked shaft nut 25 and the oil amount adjusting rod 26, a clamping groove is arranged on the oil amount adjusting rod 26 for connecting a rotating pin of a high-pressure oil pump, the eccentric shaft 30 passes through a sleeve hole of the crankcase 47, the eccentric shaft passes through an oil supply adjusting rod 29 and a starting thickening pull rod 32, a conical return spring 31 is fixed at one end of the eccentric shaft 30, the other end of the eccentric shaft 30 passes through a round hole of the oil supply adjusting rod 29, an adjusting rod pin 27 is fixed at one end of the oil supply lever 10 in an interference manner, the oil supply lever 10 passes through the clamping groove of the forked shaft 28, an eccentric shaft O-ring 34 and an open retainer ring 33 are arranged on the eccentric shaft 30, the eccentric shaft O-ring 34 and the sleeve in the crankcase 47 are in an interference manner, the split collar 33 is used for limiting the eccentric shaft 10 from moving outwards.

Specifically, it is fixed with hexagon socket flat end holding screw 36 through thin hexagonal nut 37 to start enrichment pull rod 32, just, hexagon socket flat end holding screw 36's tip is 19mm with the planar initial distance of thin hexagonal nut 37, fuel feeding adjusting rod 29 has adjusting rod swivel nut 28 through the threaded fixation, be equipped with flange push rod 39 on the adjusting rod swivel nut 28, fuel feeding adjusting rod 29 with start fixedly connected with speed governing extension spring 40 between the enrichment pull rod 32, be equipped with parking buffer screw 41, light spring packing ring 43, parking buffer screw nut 42, high-speed adjusting screw 45 and high-speed adjusting screw nut 45 on the fuel feeding lever 10.

The working principle is as follows: normal throttle plus subtract function, stir oil supply lever 10, stop by the pull rod and supply to keep off 4 position rebound of nail, drive eccentric shaft 30 and rotate, and toper return spring 31 also with twisting reverse, drive oil supply adjusting lever 29 outwards in the lump and rotate, adjusting lever round pin axle 27 on the oil supply adjusting lever 29 drives fork axle 28 and rotates, and oil mass adjusting lever 26 also follows outwards to rotate, high-pressure oil pump 46 is changeed the round pin and is followed oil mass adjusting lever 26 fluting and remove, the increase of the oil mass switch of realization. On the contrary, when the oil supply lever 10 moves downwards, the eccentric shaft 30 is driven to rotate, the conical return spring 31 also drives the oil supply adjusting rod 29 to rotate inwards, the adjusting rod pin 27 on the oil supply adjusting rod 29 drives the forked shaft 28 to rotate, the oil quantity adjusting rod 26 also rotates inwards, the high-pressure oil pump 46 rotates to move along with the slotting of the oil quantity adjusting rod 26, and the reduction of the oil quantity switch is realized.

When the power generated by the diesel engine is exactly balanced with the external load, the centrifugal force generated by the flyweight 47 is balanced with the elastic force of the spring, the flyweight pin 471 always protrudes at a certain distance, and the oil quantity is also kept stable. If the external load is suddenly reduced, the power emitted by the diesel engine is larger than the external load to increase the rotating speed, at this time, the centrifugal force of the flyweight is larger than the elastic force of the spring to enable the flyweight pin 471 to extend outwards, the flyweight pin 471 abuts against the flange push rod 39, the flange push rod 39 synchronously pushes the oil supply adjusting rod 29 to move inwards when pushed forwards, the adjusting rod pin shaft 27 on the oil supply adjusting rod 29 drives the fork-shaped shaft 28 to rotate, the oil quantity adjusting rod 26 rotates inwards, the rotating pin of the high-pressure oil pump 46 moves along with the groove of the oil quantity adjusting rod 26, and the automatic reduction of the oil quantity switch is adjusted. When the engine speed is reduced to a certain degree, the engine speed is reduced, at the moment, the centrifugal force of the flyweight is slowly balanced with the elastic force of the spring, the flyweight pin 471 also contracts inside the flyweight 47, the oil supply adjusting rod 29 gradually returns to the original state, the adjusting rod pin 27 on the oil supply adjusting rod 29 drives the fork-shaped shaft 28 to rotate, the oil quantity adjusting rod 26 also rotates outwards, the rotating pin of the high-pressure oil pump 46 moves along with the groove of the oil quantity adjusting rod 26, and the oil quantity switch which is automatically realized is often adjusted in a large direction. The whole process makes the engine work stably at various rotating speeds, and the speed regulation is soft.

Referring to the attached drawings 7-8 in the specification, the maximum oil quantity adjustment under different powers is met, the internal structure of the eccentric shaft limiting plate 5 comprises an adjusting hole 501, an adjusting hole 502, an adjusting hole 503 and an adjusting hole 504, when one end of the limiting plate torsion spring 11 is installed in the adjusting hole 501, the maximum throttle can be met, the power can reach more than 11KW, the included angle between the adjusting hole 501 and the adjusting hole 502 is 36 degrees, the included angle between the adjusting hole 502 and the adjusting hole 503 is 45 degrees, the included angle between the adjusting hole 503 and the adjusting hole 504 is 66 degrees, and the limiting plate torsion spring 11 is installed at different angles and can meet different maximum speeds. Meanwhile, the sector plate adjusting screw 14 rotates towards the inside of the crankcase 47, the sector plate 18 is driven by the sector plate adjusting screw 14 to move towards the inside, the edge of the sector plate contacts with the edge 261 of the oil quantity adjusting rod, the edge 261 of the adjusting rod rotates under the action of the stud bolt 21 of the adjusting rod, the position of the maximum throttle is fixed and becomes small, and conversely, the sector plate adjusting screw 14 rotates towards the outside of the crankcase 47, so that the position of the maximum throttle can become large.

The high-speed state is finely adjusted, so that the power requirement of the engine is met at high speed, the exhaust temperature can reach a good state, during long-term testing of the machine, it was found that there was some over-high machine speed, and the socket head cap set screw 36 was bottomed out, the speed could be reduced, but not to the ideal state, the high speed adjusting screw 44 is added, and the high speed adjusting screw nut 45 is mounted on the fuel supply adjusting rod 29 together with the light spring washer 43, when the high speed adjustment screw 44 is screwed up or down, the start enrichment lever contact surface 321 may either fully contact the oil feed adjustment lever contact surface 291, or may contact the ball of the high speed adjustment screw 44, when the adjusted state and the speed control tension spring 40 reach an optimal balance point, the swing of the starting enrichment lever 32 is small, and drives the fuel quantity adjusting lever 26 to an optimum fuel supply state and an optimum rotational speed state.

Referring to the specification and the attached figure 9, the rotating speed 2900r/min meets the power requirement after adjustment, the exhaust temperature only reaches more than 400 degrees, and the reliability of the machine is greatly enhanced.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.