CN218624414U - Axial plunger type six-cylinder four-stroke gasoline engine - Google Patents

Abstract

The utility model belongs to the technical field of the gasoline engine, a six jar four-stroke gasoline engine of axial plunger type is disclosed, the gasoline engine includes cylinder head assembly, cylinder head, pressure boost casing, carburetor, intake pipe, blast pipe, flywheel shell, ignition flywheel, ignition sensor, starter motor, lubricating oil pump, cooling water pump, belt pulley, sloping cam plate rotor, bearing, rotor housing etc.. A cylinder head assembly, a cylinder sleeve and a cylinder are arranged at two ends of the engine; the front end is provided with a pressurizing shell, a pressurizing impeller, a carburetor and a belt pulley; the rear end is provided with an ignition flywheel, a flywheel shell, a starting motor, a lubricating oil pump and a cooling water pump. The utility model discloses a six jar four-stroke gasoline engine of axial plunger type, radial relative dimension is little, compact structure, unit weight power is higher relatively, and engine speed improves greatly, and structural reliability strengthens for fixed wing propeller aircraft or rotor craft.

Description

Axial plunger type six-cylinder four-stroke gasoline engine

Technical Field

The utility model belongs to the technical field of the gasoline engine, especially, relate to an axial plunger type six jar four-stroke gasoline engine.

Background

Gasoline engines for unmanned aerial vehicles, in particular fixed-wing propeller aircraft, typically have engine requirements including the following: the structure is compact, the appearance is accordant and is beneficial to the aerodynamic layout design of the aircraft, the resistance is small, the relative weight is light, the vibration and the noise are small, and the oil consumption is low. For the helicopter, the output torque is required to be large, and the reliability is high. Gasoline engines currently used in aircraft are mainly horizontal opposed, radial gasoline engines, rotary engines, conventional V-shaped or in-line gasoline engines, and the like. The horizontal opposed gasoline engine is mainly applied to a rotor aircraft due to the large transverse size, and part of miniature horizontal opposed gasoline engines are applied to a fixed-wing model airplane. Radial piston engines were widely used in propeller-type aircraft in the early days of birth, but with the advent of jet engines, the engines gradually exited the field of aircraft engines, and only a few small radial gasoline engines were used in model airplanes, and the application of such engines was also limited by the radial dimensions. The rotor engine is suitable for being applied to a fixed-wing aircraft as a small aircraft engine due to high rotating speed, small volume and high power, but is not generally applied at present due to the reasons of serious abrasion in a cylinder, high maintenance difficulty, short service life and the like. The conventional V-shaped and in-line gasoline engines are mainly used on motor vehicles and oil-driven gyroplanes, and the conventional V-shaped and in-line gasoline engines are limited in technical development prospect due to the fact that the crank shafts, the pistons, the connecting rods and other parts of the conventional V-shaped and in-line gasoline engines are heavy in structure weight, the whole size of the engine is large, and the power density is small.

Through the above analysis, the problems and defects of the prior art are as follows:

(1) Except for a rotor engine, the existing engine has large radial size, unsmooth pneumatic appearance and large generated resistance, and influences the pneumatic optimization design of an aircraft.

(2) The rotor engine has no common application at present due to the problems of high running rotating speed, large friction in a cylinder, large consumption of lubricating oil and fuel oil and the like.

SUMMERY OF THE UTILITY MODEL

To the problems existing in the prior art, the utility model provides an axial plunger type six-cylinder four-stroke gasoline engine.

The utility model discloses a realize like this, an axial plunger type six-cylinder four-stroke gasoline engine, the gasoline engine is the four-stroke gasoline engine, and the cylinder head top sets up into exhaust valve respectively 1, and intake and exhaust valve passes through the camshaft rotation switching, and the camshaft is driven through a pair of 1:1 bevel gear and 1:2 straight gear transmission by the main shaft, and the angle is 270 degrees between the cam that intake and exhaust valve corresponds, and the interval angle of starting a fire is the same with each jar circumference arrangement angle.

Further, the axial plunger type six-cylinder four-stroke gasoline engine includes: the device comprises a cylinder head assembly, a cylinder cover, a pressurizing shell, a carburetor, an air inlet pipe, an exhaust pipe, a flywheel shell, an ignition flywheel, an ignition sensor, a starting motor, a lubricating oil pump, a cooling water pump, a belt pulley, a swash plate rotor, a bearing, a rotor shell, a piston assembly, a cylinder sleeve, an air cylinder, a sealing ring, a pressurizing impeller, a main shaft transmission bevel gear and a main shaft reduction gear;

the two ends of the axial plunger type six-cylinder four-stroke gasoline engine are respectively provided with three cylinder head assemblies, the cylinder sleeve and the cylinder in an opposite way; the front end of the engine is an output end, and the supercharging shell, the supercharging impeller, the carburetor and the belt pulley are installed on the front end of the engine; the rear end of the engine is a free end, and the ignition flywheel, the flywheel shell, the starting motor, the lubricating oil pump and the cooling water pump are installed; the middle part of the engine is provided with the swash plate rotor and the rotor shell.

Furthermore, the cylinder head assembly consists of a cylinder head, a camshaft reduction gear, a reduction shaft, an air inlet and outlet valve, a spring, an air valve top cover and a spark plug; the cylinder head is similar to an equilateral triangle in appearance, three cylinder sleeves and three cylinders are uniformly arranged at one end of the cylinder head by taking the center as a symmetry axis, the center is positioned and arranged with a swash plate rotor shaft system through a bearing, and three sets of intake and exhaust valves, a spring, an air valve top cover, a cam shaft and a spark plug are uniformly arranged at the other side of the cylinder head.

Furthermore, one end of the cam shaft is meshed and connected with the speed reducing shaft through the cam shaft speed reducing gear, the transmission ratio is 1:2, the speed reducing shaft is meshed with the main shaft transmission bevel gear through a bevel gear, and the transmission ratio is 1:1. The two ends of the cam shaft are fixed in the cylinder head through bearings, the middle cam part is contacted with the air valve top cover, the air valve top cover and the spring are sleeved at one end of the air inlet and outlet valve, the air inlet and outlet valve integrally penetrates through the cylinder head, and the other end of the air inlet and outlet valve extends into the cylinder sleeve. The spark plug is installed in the cylinder head through a threaded hole, and the ignition end extends into the cylinder sleeve.

Furthermore, the swash plate rotor is installed and positioned in the rotor shell through a bearing, the cylinder sleeve and the cylinder are installed at two ends of the rotor shell, and three piston assemblies are horizontally arranged on two sides of the swash plate rotor in an opposite mode respectively.

The piston assembly comprises a piston, a piston ring, an oil scraper ring and a swash plate slide block, wherein the piston, the piston ring and the oil scraper ring are arranged at two ends of the piston assembly, the piston assembly extends into the cylinder sleeve and is in sliding contact with the inner surface of the cylinder sleeve, the piston is internally provided with a hollow reinforcing rib structure, a pair of swash plate slide blocks are arranged on a reinforcing rib in the middle of the piston assembly, and the slide blocks are in sliding contact with and positioned on a swash plate of the swash plate rotor;

further, when the engine runs, the piston assembly reciprocates in the cylinder sleeve and drives the swash plate rotor to rotate through the swash plate sliding block.

Furthermore, the air cylinder is positioned at the periphery of the cylinder sleeve, the length of the cylinder sleeve is slightly larger than that of the air cylinder, and two ends of the extending part are embedded into the rotor shell and the cylinder head and are fixed through bolts; a cooling water flowing space is formed between the air cylinder and the cylinder sleeve, and the air cylinder and the cylinder sleeve are sealed by a sealing ring; and communicating pipes are arranged among the 3 cylinders on the same side to ensure that the cooling water of each cylinder is communicated with each other to uniformly dissipate heat.

Furthermore, the carburetors are arranged on the left side and the right side of the pressurizing shell, the pressurizing impeller is arranged in the pressurizing shell, and the center of the pressurizing impeller is fixed on the swash plate rotor.

Furthermore, the cylinder cover is evenly provided with three pairs of air inlet pipe joints in the circumferential direction, air inlet pipes on 6 cylinder heads of the engine are correspondingly connected with the air inlet pipe joints, and when the engine runs, outside air enters the supercharging shell through the carburetor, is rotationally supercharged through the supercharging impeller, and enters the cylinder heads and the cylinder sleeve of the engine through 6 air inlet pipes arranged on the cylinder cover at the output end.

Further, the lower end of the carburetor is connected with an oil tank through a fuel oil pipe, fuel oil is mixed with fresh air under the injection action of intake flow and enters a combustion chamber from an intake pipe, and when the engine is started, the mixed oil gas is combusted and works under the compression of a piston assembly and the ignition of a spark plug, and the engine is maintained to run continuously.

Further, the flywheel shell is inside by the ignition flywheel main shaft reduction gear, the externally mounted lubricating oil pump cooling water pump with starter motor, wherein, the lubricating oil pump cooling water pump with the internal toothing of ignition flywheel, starter motor with ignition flywheel external toothing.

Further, the lubricating oil pump is used for providing cooling and lubricating functions for sliding and rotating parts of the engine during the operation of the engine; the lubricating oil pump absorbs oil from the rotor shell and then conveys the oil to the cylinder head and the rotor shell for lubricating the camshaft, the gear, the air inlet and outlet valve, the piston assembly, the swash plate rotor and the bearing moving part, and the cooling water pump is used for cooling six cylinder sleeves and the cylinder head.

Further, the ignition flywheel is meshed with the main shaft speed reduction gear on the swash plate rotor through a planetary transmission gear set, and the transmission ratio is 1: and 6, 3 magnetic blocks which are arranged at intervals of 120 degrees are arranged on the ignition flywheel, 6 ignition sensors are arranged on the shell of the ignition flywheel, the installation positions are mutually separated by 60 degrees, the ignition sensors are connected with a starting ignition system and sequentially connected with spark plugs of the 1 st, 5 th, 3 th, 4 th, 2 th and 6 th cylinders in a clockwise sequence for timed ignition.

Combine the technical problem of foretell technical scheme and solution, the utility model discloses the advantage and the positive effect that technical scheme that will protect possessed are:

the utility model discloses an engine piston axial opposition, the stroke is less than the cylinder diameter, wholly is the triangular prism shape and arranges, compact structure, and no circumferencial direction vibration, engine variable speed response are fast, and power density is higher.

The engine lubricating and cooling system adopted by the utility model is simple in arrangement and enhanced in long-time running reliability;

the utility model discloses an ignition interval angle and each jar circumference arrange that the angle is the same, and the engine moves in service moving member atress, degree of wear the same, and structural reliability improves.

The utility model discloses utilize two-way horizontal opposition plunger pump principle and gasoline engine theory of operation to combine together, turn into the rotary motion of main shaft to the reciprocating motion of horizontal opposition piston through the sloping cam plate to reciprocating type engine structural style about having changed, engine cylinder is along the two-way opposition of main shaft direction, wholly is the triangular prism shape, and the structure is compacter.

The utility model discloses technical scheme conversion back, but the wide application of small-size engine is in many rotor unmanned aerial vehicle, fixed wing model aeroplane and model car. The medium engine can be applied to the fields of fixed-wing propeller aircrafts, motor vehicles and the like.

At present, no similar products appear in China, and the novel bidirectional plunger type four-stroke gasoline engine fills the blank in the field of bidirectional plunger type four-stroke gasoline engines.

Drawings

FIG. 1 is an overall structure diagram of an axial plunger type six-cylinder four-stroke gasoline engine provided by an embodiment of the present invention;

FIG. 2 is a sectional view of an axial plunger type six-cylinder four-stroke gasoline engine according to an embodiment of the present invention;

fig. 3 is a structural assembly diagram of a cylinder head assembly according to an embodiment of the present invention;

FIG. 4 is a view of the piston assembly, swash plate rotor assembly and mounting provided by an embodiment of the present invention;

FIG. 5 is an exploded view of a cylinder liner, cylinder, and seal provided by an embodiment of the present invention;

fig. 6 is a structural diagram of an output terminal according to an embodiment of the present invention;

fig. 7 is a structural diagram of an output end according to an embodiment of the present invention.

In the figure: 1. a cylinder head assembly; 2. a cylinder head; 3. a pressurizing housing; 4. a carburetor; 5. an air inlet pipe; 6. an exhaust pipe; 7. a flywheel housing; 8. an ignition flywheel; 9. an ignition sensor; 10. starting the motor; 11. a lubricating oil pump; 12. a cooling water pump; 13. a belt pulley; 14. a swash plate rotor; 15. a bearing; 16. a rotor case; 17. a piston assembly; 18. a cylinder liner; 19. a cylinder; 20. a seal ring; 21. a booster impeller; 22. the main shaft drives the bevel gear; 23. a main shaft reduction gear; 24. a piston; 25. a piston ring; 26. an oil scraper ring; 27. a swash plate slide block; 28. a cylinder head; 29. a camshaft; 30. a camshaft reduction gear; 31. a deceleration shaft; 32. an air inlet valve and an air outlet valve; 33. a spring; 34. a gas valve top cover; 35. a spark plug.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment of the utility model provides an utilize two-way swash plate formula plunger pump and four-stroke gasoline engine theory of operation to combine together, turn into the rotary motion of main shaft to the reciprocating motion of horizontal opposition piston through the sloping cam plate to reciprocating type engine structural style about having changed, engine cylinder is along the two-way opposition of main shaft direction, wholly is the triangular prism shape, and the structure is compacter. The engine is designed as a four-stroke gasoline engine, the top of the cylinder head is provided with 1 intake and exhaust valve, the intake and exhaust valves are rotationally opened and closed through a camshaft, the camshaft is driven by a main shaft through a pair of 1:1 bevel gears and 1:2 straight gears in a transmission way, and the angle between cams corresponding to the intake and exhaust valves is 270 degrees. The ignition interval angle is the same as the circumferential arrangement angle of each cylinder, the stress and abrasion degree of the moving part in the operation of the engine are the same, and the structural reliability is improved. The output end of the engine is designed with mechanical supercharging, and the stroke of the engine piston is smaller than the cylinder diameter, so that the engine has fast speed change response, the rotating speed is improved, and the combustion efficiency and the power density of the engine are improved.

As shown in fig. 1 to fig. 3, the embodiment of the present invention provides an axial plunger type six-cylinder four-stroke gasoline engine, which comprises a cylinder head assembly 1, a cylinder head 2, a supercharging housing 3, a carburetor 4, an intake pipe 5, an exhaust pipe 6, a flywheel housing 7, an ignition flywheel 8, an ignition sensor 9, a starting motor 10, a lubricating oil pump 11, a cooling water pump 12, a belt pulley 13, a swash plate rotor 14, a bearing 15, a rotor housing 16, a piston assembly 17, a cylinder liner 18, a cylinder 19, a sealing ring 20, a supercharging impeller 21, a spindle transmission bevel gear 22, and a spindle reduction gear 23.

The two ends of the engine are respectively provided with three cylinder head assemblies 1, a cylinder sleeve 18 and a cylinder 19 in an opposite way, the front end is an output end, and a supercharging shell 3, a supercharging impeller 21, a carburetor 4 and a belt pulley 13 are arranged; the rear end is a free end, and is provided with an ignition flywheel 8, a flywheel shell 7, a starting motor 10, a lubricating oil pump 11 and a cooling water pump 12. The center is a swash plate rotor 14 and a rotor housing 16. The cylinder head assembly 1 is composed of a cylinder head 28, a camshaft 29, a camshaft reduction gear 30, a reduction shaft 31, an air inlet and exhaust valve 32, a spring 33, an air valve top cover 34 and a spark plug 35. The cylinder head 28 is similar to an equilateral triangle in shape, one end of the cylinder head is uniformly provided with three cylinder sleeves 18 and three cylinders 19 by taking the center as a symmetrical shaft, and the center is positioned and arranged with the shaft of the swash plate rotor 14 through the bearing 15. And three sets of inlet and outlet valves 32, a spring 33, a valve top cover 34, a cam shaft 29 and a spark plug 35 are uniformly arranged on the other side. One end of the cam shaft 29 is meshed and connected with a speed reducing shaft 31 through a cam shaft speed reducing gear 30, the transmission ratio is 1:2, the speed reducing shaft 31 is meshed with the main shaft transmission bevel gear 22 through a bevel gear, and the transmission ratio is 1:1. The two ends of the cam shaft are fixed in the cylinder head through bearings, the middle cam part is contacted with the air valve top cover, the air valve top cover and the spring are sleeved at one end of the air inlet and outlet valve, the air inlet and outlet valve integrally penetrates through the cylinder head, and the other end of the air inlet and outlet valve extends into the cylinder sleeve. The spark plug is installed in the cylinder head through a threaded hole, and the ignition end extends into the cylinder sleeve.

As shown in fig. 4 and 5, the swash plate rotor 14 is mounted and positioned in the rotor housing 16 through the bearing 15, the cylinder sleeves 18 and the cylinders 19 are mounted at two ends of the rotor housing 16, two sides of the swash plate rotor 14 are respectively and horizontally opposite to three piston assemblies 17, and the piston assemblies 17 are composed of pistons 24, piston rings 25, oil scraper rings 26 and swash plate slide blocks 27. At each end of the piston assembly 17 are a piston 24, a piston ring 25, and a scraper ring 26, which extend into the cylinder liner 18 and are in sliding contact with the inner surface thereof. The interior of the piston 24 is a hollow reinforcing rib structure, a pair of swash plate slide blocks 27 are arranged on the reinforcing ribs in the middle of the piston assembly 17, the swash plate slide blocks 27 are in sliding contact with and positioned on a swash plate of the swash plate rotor 14, and when the engine runs, the piston assembly 17 reciprocates in the cylinder sleeve 18 and drives the swash plate rotor 14 to rotate through the swash plate slide blocks 27. The cylinder 19 is located at the periphery of the cylinder sleeve 18, the length of the cylinder sleeve 18 is slightly larger than that of the cylinder 19, and two ends of the extending part are embedded into the rotor shell 16 and the cylinder head 28 and fixed through bolts. A cooling water flowing space is formed between the cylinder 19 and the cylinder sleeve 18, and the cooling water flowing space and the cylinder sleeve are sealed by a sealing ring 20. Because the engine cylinders are independently installed, the communicating pipes are arranged among the 3 cylinders on the same side, so that the cooling water of each cylinder is communicated with each other to uniformly dissipate heat.

As shown in fig. 6, a supercharging housing 3 is mounted on the cylinder head 2 at the output end of the engine, carburetors 4 are mounted on the left and right sides of the supercharging housing 3, a supercharging impeller 21 is mounted inside the supercharging housing, and the center of the supercharging impeller 21 is fixed on the swash plate rotor 14. The cylinder cover 2 of the output end is evenly provided with three pairs of air inlet pipe 5 joints along the circumferential direction, and the air inlet pipes 5 on the 6 cylinder heads 28 of the engine are respectively and correspondingly connected with the air inlet pipe 5 joints. When the engine runs, outside air enters the supercharging shell 3 through the carburetor 4, is subjected to rotary supercharging through the supercharging impeller 21, and enters the corresponding cylinder head 28 and the cylinder sleeve 18 of the engine through 6 air inlet pipes 5 arranged on the output end cylinder cover 2. The lower end of the carburetor 4 is connected with an oil tank through a fuel pipe, fuel oil is mixed with fresh air under the injection action of intake flow and enters a combustion chamber from an intake pipe 5, and when the engine is started, the mixed oil gas is combusted under the compression of the piston assembly 17 and the ignition of the spark plug 35 to do work, and the continuous operation of the engine is maintained.

As shown in fig. 7, a flywheel housing 7 is mounted on the cylinder head 2 at the free end of the engine, the interior of the flywheel housing is provided with an ignition flywheel 8 and a main shaft reduction gear 23, and the exterior of the flywheel housing is provided with a lubricating oil pump 11, a cooling water pump 12 and a starting motor 10, wherein the lubricating oil pump 11 and the cooling water pump 12 are meshed with the internal teeth of the ignition flywheel 8, and the starting motor 10 is meshed with the external teeth of the ignition flywheel 8. The lubricating oil pump 11 is used to provide cooling and lubrication to the sliding and rotating parts of the engine during engine operation. The lubricating oil pump 11 sucks oil from the rotor shell, and then conveys the oil into the cylinder head assembly 1 and the rotor shell 16 for lubricating moving parts such as a camshaft 29, gears, an air inlet and outlet valve 32, a piston assembly 17, a swash plate rotor 14, a bearing 15 and the like; the cooling water pump 12 is used to cool the cylinder liner 18 and the cylinder head 28. The ignition flywheel 8 is connected with a main shaft reduction gear 23 on the swash plate rotor 14 through a planetary transmission gear set, and the transmission ratio is 1:6, 3 magnetic blocks with 120-degree intervals are installed on the ignition flywheel 8, 6 ignition sensors 9 are installed on the flywheel shell, the installation positions are 60-degree intervals, the ignition sensors 9 are connected with the ignition starting system, and the ignition sensors 9 are sequentially connected with the spark plugs 35 of the 1 st, 5 th, 3 rd, 4 th, 2 th and 6 th cylinders in a clockwise sequence and used for timing ignition.

Further, the method for setting the valve timing of the intake valve and the exhaust valve of the gasoline engine comprises the following steps:

the timing principle for the air distribution of the air inlet and outlet valves of the gasoline engine is that a complete working cycle of the four-stroke diesel engine comprises four strokes, namely air suction, compression, work application and air exhaust. And the rotating angle of the swash plate rotor corresponding to each stroke is 180 degrees, the phase difference between the air inlet stroke and the air outlet stroke is 540 degrees, and the rotating speed ratio between the swash plate rotor and the camshaft is 2:1, so the phase difference between the interval angles of the air inlet cam and the air outlet cam on the camshaft is 270 degrees.

The embodiment of the utility model provides a method for setting the ignition sequence of a gasoline engine comprises:

the engine is arranged in three opposite cylinders, and the ignition interval angle of each cylinder is 120 degrees according to the principle that the cylinders are uniformly ignited and have the same interval. The engine is designed to rotate clockwise when viewed from a free end, the cylinders at the free end are numbered as 1, 2 and 3 clockwise, and the cylinders at the output end are numbered as 4, 5 and 6 in sequence. According to the principle that two ends are sequentially spaced by 120 degrees to fire, the fire sequence is 1, 5, 3, 4, 2 and 6. In order to ensure that the ignition of each cylinder is carried out at the correct moment, the interval angle of each cylinder takes the 1 st cylinder as the reference, when the piston of the first cylinder is at the top dead center position of the cylinder sleeve, an air inlet cam on a cam shaft starts to press down an air valve top cover and a spring, an exhaust cam and the air inlet cam are spaced by 270 degrees, and cam shafts of other cylinders sequentially rotate by 120 degrees clockwise according to the ignition sequence. Meanwhile, in order to ensure that the spark plug ignites at the top dead center of the compression stroke, the first magnetic block on the ignition flywheel and the ignition sensor of the first cylinder are staggered by 60 degrees clockwise.

The embodiment of the utility model provides a two-way plunger type structure, piston assembly motion is the same with the axial, is different from the engine of opposite formula, and horizontal size is little. And the engine profile is equilateral triangle, so the aerodynamic profile is superior to star engines and conventional V-and inline engines.

The embodiment of the utility model provides a design six jars of two-way opposition, compare with other gasoline engines of the same cylinder total volume, this novel will be light in weight, the total volume is on the small side, therefore power density is great.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be covered within the protection scope of the present invention by those skilled in the art within the technical scope of the present invention.

Claims (10)

1. The axial plunger type six-cylinder four-stroke gasoline engine is characterized in that the gasoline engine is designed as a four-stroke gasoline engine, 1 intake and exhaust valve is arranged at the top of a cylinder head, the intake and exhaust valves are rotatably opened and closed through a camshaft, the camshaft is driven by a main shaft through a pair of 1:1 bevel gears and 1:2 straight gears in a transmission manner, the angles between cams corresponding to the intake and exhaust valves are 270 degrees, and the ignition interval angles are the same as the circumferential arrangement angles of the cylinders.

2. The axial plunger type six-cylinder four-stroke gasoline engine as claimed in claim 1, wherein, a cylinder head assembly, a cylinder cover, a pressurizing shell, a carburetor, an air inlet pipe, an exhaust pipe, a flywheel housing, an ignition flywheel, an ignition sensor, a starting motor, a lubricating oil pump, a cooling water pump, a belt pulley, a swash plate rotor, a bearing, a rotor shell, a piston component, a cylinder sleeve, a cylinder, a sealing ring, a pressurizing impeller, a main shaft transmission bevel gear and a main shaft reduction gear are provided;

the two ends of the engine of the axial plunger type six-cylinder four-stroke gasoline engine are respectively provided with three cylinder head assemblies, a cylinder sleeve and a cylinder in an opposite way; the front end of the engine is an output end and is provided with a supercharging shell, a supercharging impeller, a carburetor and a belt pulley; the rear end of the engine is a free end and is provided with an ignition flywheel, a flywheel shell, a starting motor, a lubricating oil pump and a cooling water pump; the middle part of the engine is provided with the swash plate rotor and the rotor shell.

3. The axial plunger type six-cylinder four-stroke gasoline engine as claimed in claim 2, wherein the cylinder head assembly is provided with a cylinder head, a camshaft reduction gear, a reduction shaft, an intake and exhaust valve, a spring, a valve top cover, and a spark plug;

one end of the cylinder head is uniformly provided with three cylinder sleeves and cylinders by taking the center as a symmetrical shaft, the center is positioned and installed with a swash plate rotor shaft system through a bearing, and the other side of the cylinder head is uniformly provided with three sets of inlet and outlet valves, a spring, an air valve top cover, a cam shaft and a spark plug; one end of the camshaft is meshed and connected with the speed reducing shaft through the camshaft speed reducing gear, the transmission ratio is 1:2, the speed reducing shaft is meshed with the main shaft transmission bevel gear through a bevel gear, and the transmission ratio is 1:1;

the two ends of the cam shaft are fixed in the cylinder head through bearings, the middle cam part is in contact with the air valve top cover, the air valve top cover and the spring are sleeved at one end of the air inlet and outlet valve, the air inlet and outlet valve integrally penetrates through the cylinder head, the other end of the air inlet and outlet valve extends into the cylinder sleeve, the spark plug is installed in the cylinder head through a threaded hole, and the ignition end extends into the cylinder sleeve.

4. The axial plunger type six-cylinder four-stroke gasoline engine as defined in claim 2, wherein said swash plate rotor is mounted and positioned in said rotor housing by bearings, said cylinder liners and said cylinders are mounted at both ends of said rotor housing, and three said piston assemblies are horizontally opposed on both sides of said swash plate rotor, respectively.

5. The axial plunger type six-cylinder four-stroke gasoline engine as defined in claim 2, wherein the piston assembly is composed of a piston, a piston ring, an oil scraper ring, and a swash plate slide block, the piston ring and the oil scraper ring are arranged at two ends of the piston assembly, the piston ring and the oil scraper ring extend into the cylinder sleeve and are in sliding contact with the inner surface of the cylinder sleeve, the piston is internally provided with a hollow reinforcing rib structure, a pair of swash plate slide blocks are arranged on the reinforcing rib at the middle part of the piston assembly, and the slide blocks are in sliding contact with and positioned on a swash plate of the swash plate rotor.

6. The axial plunger type six-cylinder four-stroke gasoline engine as defined in claim 2, wherein said piston assembly reciprocates within said cylinder liner during operation of said engine and drives said swash plate rotor to rotate via a swash plate slide.

7. The axial plunger type six-cylinder four-stroke gasoline engine as claimed in claim 2, wherein the cylinder is located at the periphery of a cylinder sleeve, the length of the cylinder sleeve is slightly longer than that of the cylinder, and both ends of the extended part are embedded into the rotor shell and the cylinder head and fixed through bolts; a cooling water flowing space is formed between the air cylinder and the cylinder sleeve, and the air cylinder and the cylinder sleeve are sealed through a sealing ring; and communicating pipes are arranged among the 3 cylinders on the same side.

8. The axial plunger type six-cylinder four-stroke gasoline engine as claimed in claim 2, wherein said carburetor is installed on both left and right sides of said booster casing, said booster impeller is installed inside, and said booster impeller is fixed at its center on said swash plate rotor.

9. The axial plunger type six-cylinder four-stroke gasoline engine as claimed in claim 2, wherein the cylinder head is uniformly provided with three pairs of air inlet pipe joints in the circumferential direction, air inlet pipes on 6 cylinder heads of the engine are respectively and correspondingly connected with the air inlet pipes, when the engine runs, outside air enters the supercharging shell through the carburetor, is subjected to rotary supercharging through the supercharging impeller, and enters the cylinder head and the cylinder sleeve of the engine through 6 air inlet pipes arranged on the cylinder head at the output end;

the lower end of the carburetor is connected with an oil tank through a fuel pipe;

the flywheel shell is inside by the ignition flywheel main shaft reduction gear, the external mounting the lubricating oil pump cooling water pump with starter motor, wherein, the lubricating oil pump cooling water pump with the internal gearing of ignition flywheel, starter motor with ignition flywheel external gearing.

10. An axial plunger type six cylinder four stroke gasoline engine as set forth in claim 2 wherein said ignition flywheel is engaged with said main shaft reduction gear on said swash plate rotor through a planetary drive gear set at a transmission ratio of 1: and 6, 3 magnetic blocks which are arranged at intervals of 120 degrees are arranged on the ignition flywheel, 6 ignition sensors are arranged on the shell of the ignition flywheel, the installation positions are mutually separated by 60 degrees, the ignition sensors are connected with a starting ignition system and sequentially connected with spark plugs of 1 st, 5 th, 3 rd, 4 th, 2 th and 6 th cylinders in a clockwise sequence.

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