A compact gasoline engine assembly
Through a compact design and a reasonable air duct layout, the problems of complex structure and slow heat dissipation of traditional gasoline engines have been solved, resulting in simplified assembly, reduced vibration and fuel consumption, and improved heat dissipation and lubrication efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING KEMA IND & TRADE
- Filing Date
- 2026-05-14
- Publication Date
- 2026-06-30
AI Technical Summary
Traditional gasoline engines have complex structures, are difficult to assemble, cause large vehicle vibrations, have high fuel consumption, high temperatures and slow heat dissipation, low lubrication efficiency, high maintenance costs, and complex valve train design.
It adopts a compact design, integrating the cylinder head and housing into one unit. The air distribution system is designed outside the housing. The magneto stator and its wiring harness pass through the right side of the housing air guide plate. The oil-gas separation component separates through a labyrinth. The lubrication system is precise, the heat sink is specially designed, and the air duct structure is integrated.
It simplifies the assembly and maintenance process, reduces vehicle vibration, improves heat dissipation efficiency and lubrication, reduces temperature and fuel consumption, and simplifies the maintenance and adjustment of the valve train system.
Smart Images
Figure CN122304880A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of gasoline engine technology, specifically to a compact gasoline engine assembly. Background Technology
[0002] A gasoline engine is an engine that uses gasoline as fuel to convert internal energy into kinetic energy. Because gasoline has low viscosity and evaporates quickly, a gasoline injection system can be used to inject gasoline into the cylinder. After being compressed to a certain temperature and pressure, it is ignited by a spark plug, causing the gas to expand and do work.
[0003] 1. The traditional 145F engine has a complex structure, is difficult to assemble, causes large vehicle vibration, high fuel consumption, high temperature and slow heat dissipation, low lubrication efficiency, and high maintenance costs.
[0004] 2. Traditional machine bodies are divided into cylinder head, housing, housing cover, and cylinder head cover. The cavity is generally tilted at 25° or 75°, the heat sink is evenly distributed, and the high-temperature nodes are not precisely cooled.
[0005] 3. Traditional valve train systems are generally located inside the power box. The crankshaft timing gear meshes with the camshaft inside the box and rotates to drive the rocker arm on top of the cylinder head to achieve intake and exhaust. Lubrication is achieved by connecting rods with built-in oil swivel needles to atomize and lubricate the engine body, which is relatively dispersed. Exhaust gas is discharged through the design of the cylinder head cover to achieve oil-gas separation, which is relatively complex. Summary of the Invention
[0006] To achieve the above objectives, the present invention provides the following technical solution: a compact gasoline engine assembly comprising two side-by-side interlocking air deflectors, an air deflector shroud connected to the front side of the air deflectors, an igniter and a spark plug connected to the air deflectors, a pull plate assembly on the air deflector shroud, a fixedly assembled crankcase cover and crankcase body on the inner side of the air deflectors, a valve train system within the crankcase body, an oil-gas separator assembly on the upper inner side of the connection between the crankcase cover and the crankcase body, a carburetor on the upper side wall of the crankcase body, the carburetor connected to the oil-gas separator assembly via an exhaust pipe, an air filter connected to the carburetor via an intake pipe, and a spark plug extending into the upper inner side of the crankcase body. The valve train system includes a crankshaft, the front side of which is connected to a magneto stator assembly. The magneto stator assembly includes a rotor with an impeller fixed to it and a stator fixed to the crankcase cover. The upper part of the crankcase is provided with upper heat sinks that decrease in a stepped manner, and the bottom of the crankcase cover is provided with lower heat sinks. The exhaust pipe of the crankcase is connected to a muffler. The crankcase cover is equipped with a trigger located above the magneto stator assembly.
[0007] Preferably, a pull plate assembly is fixedly installed on the front side of the air guide shroud, and a starting cup that cooperates with the pull plate assembly is fixed on the impeller.
[0008] Preferably, the crankcase cover is installed on the inner bottom wall of the air guide plate of the housing, the igniter is installed on the side wall of the air guide plate of the housing, and the air filter is integrated into the air guide cover.
[0009] Preferably, the oil-gas separation assembly includes an oil-gas separation channel, an oil-gas separation labyrinth is provided on one side of the oil-gas separation channel connected to the exhaust pipe, and a through hole communicating with the inside of the crankcase cover is provided on the other side of the oil-gas separation channel, and a breather valve plate fixed to the crankcase is provided at the through hole.
[0010] Preferably, the valve train further includes a cylinder liner embedded in the upper inner side of the crankcase, a connecting rod fixed in the middle of the crankshaft, a piston rotatably connected to the upper end of the connecting rod, the piston slidingly connected in the cylinder liner, a timing gear fixed to the rear end of the crankshaft, an oil winch and a camshaft gear rotatably connected to the inner wall of the crankcase, a cam fixed on the camshaft gear, two intake and exhaust rocker arms rotatably connected to the side wall of the crankcase, the intake and exhaust rocker arms cooperating with the cam, and a crankcase rear cover provided on the rear side of the crankcase corresponding to the timing gear.
[0011] Preferably, two valve lifters pass through the upper rear side of the crankcase, and the lower ends of the valve lifters respectively abut against the upper side of the intake and exhaust rocker arms. Two upper rocker arms are rotatably connected to the inner upper part of the crankcase, and the rear side of the upper rocker arms is fixed to the valve lifters respectively. An intake and exhaust assembly is provided on the front upper part of the crankcase, and the upper end of the intake and exhaust assembly cooperates with the front end of the upper rocker arm. The spark plug extends to the upper side of the piston.
[0012] Preferably, the intake and exhaust assembly includes an intake valve seat, intake and exhaust valves, an oil baffle, and a spring. Intake valve seats and springs are fitted onto the outer sides of both intake and exhaust valves. An oil baffle is provided between the intake valve seat and the spring on one of the intake and exhaust valves. The spring is located outside the valve seat, and the oil baffle is located at the top of the crankcase. The intake and exhaust valves pass through the crankcase. A connecting cavity between the cylinder liner and the carburetor is provided on the upper inner side of the crankcase. The lower ends of the intake and exhaust valves are located within the connecting cavity, and the spark plug extends into the connecting cavity. An internal airflow compression hole is provided on the upper part of the crankcase at the corresponding connecting cavity and in the middle of the two intake and exhaust valves.
[0013] Preferably, an oil guide port is installed on the bottom side of the crankcase cover, and the oil guide port, carburetor, and exhaust pipe all extend to the outside of the crankcase air guide plate. The muffler is fixedly installed on the crankcase cover.
[0014] This invention provides a compact gasoline engine assembly. It has the following advantages: 1. The air duct design of the whole machine is reasonable. The air distribution can be adjusted by directly removing the cylinder head maintenance cover. The magneto stator and other wire groups pass through the air guide plate on the right side of the box and are pushed to the appropriate position and fixed by the wire locking slider. This can not only fix the wire groups, but also have a sealing function to prevent air leakage from affecting the temperature of the whole machine.
[0015] 2. Compared with existing technologies, the cylinder head is reduced by integrating it with the housing, resulting in a simple structure. The vertical design with no tilt angle reduces the inertial force in the rotational direction, making the overall vibration smaller. The heat sink is designed with the center of the combustion chamber in mind to keep the temperature at the power cylinder head position lower. Further cooling is added to the bottom to keep the temperature of the whole vehicle lower when it meets the operating conditions.
[0016] 3. The valve train system is designed outside the housing, making power assembly and maintenance simpler and more convenient. Adjusting the valve clearance is also easier and simpler. The crankshaft is adapted to the structure design of the valve train system. While meeting the requirements of the valve train system, the design of the oil winch teeth makes the internal lubrication more precise and improves the service life. The positive pressure gas in the housing is discharged into the designed oil-gas separation chamber through the opening and closing of the valve plate, so that the housing is always under negative pressure. The oil-gas mixture first passes through two micro-interceptions and then enters the labyrinth for separation again before being discharged through the exhaust pipe into the air filter pipe and finally into the carburetor for combustion, forming a cycle. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the present invention after removing the air guide plate and air guide cover; Figure 4 for Figure 3 A structural diagram from another perspective; Figure 5 for Figure 3 A structural diagram corresponding to the starter cup; Figure 6 for Figure 3 A schematic diagram of the structure after removing the crankcase. Figure 7 for Figure 3 A schematic diagram of the structure after removing the crankcase cover; Figure 8 This is a schematic diagram of the gas distribution system in this invention; Figure 9 This is a schematic diagram of the connection between the crankshaft and the connecting rod in this invention; Figure 10This is a schematic diagram of the structure of the crankcase with the rear cover removed from the rear side.
[0018] The components are as follows: 1. Crankcase air guide plate; 2. Exhaust pipe; 3. Carburetor; 5. Spark plug; 6. Ignition device; 7. Air guide shroud; 8. Puller assembly; 9. Air filter; 10. Oil drain port; 11. Intake pipe; 12. Magneto stator assembly; 13. Impeller; 14. Crankcase cover; 15. Crankcase rear cover; 16. Muffler; 17. Crankcase; 18. Trigger; 19. Starter cup; 20. Oil-gas separator labyrinth; 21. Crankshaft; 22. Connecting rod; 23. Oil winch gear; 24. Valve lifter; 25. Cylinder liner; 26. Intake and exhaust rocker arms; 27. Cam; 28. Camshaft gear; 29. Intake and exhaust assembly; 30. Breather valve; 31. Timing gear; 32. Piston; 33. Upper rocker arm. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] like Figures 1-10 As shown, this embodiment of the invention provides a compact gasoline engine assembly, including two side-by-side air guide plates 1. A cable-locking slider is provided on the lower right side of the air guide plate 1 located on the right side. An air outlet is provided on the rear side of the air guide plate 1. The two air guide plates 1 are connected and fixed left and right by bolts and nuts. An air guide shroud 7 is bolted to the front side of the air guide plate 1. A pull plate assembly 8 is fixedly installed on the front side of the air guide shroud 7. An igniter 6 and a spark plug 5 are connected to the air guide plate 1. The igniter 6 and the spark plug 5 ignite the gasoline combustion through their cooperation. The igniter 6 is installed on the side wall of the air guide plate 1, and the spark plug 5 extends from the connection point on the upper rear side of the two air guide plates 1. The air guide shroud 7... The front side is equipped with a pull plate assembly 8. The inner side of the crankcase air guide plate 1 is provided with a crankcase cover 14 and a crankcase 17 that are fixed together by bolts and nuts. Specifically, the crankcase cover 14 is installed on the inner bottom wall of the crankcase air guide plate 1. The crankcase 17 is provided with a valve train system. An oil-gas separation assembly is provided on the upper inner side of the connection between the crankcase cover 14 and the crankcase 17. A carburetor 3 is provided on the upper side wall of the crankcase 17. The carburetor 3 is connected to the oil-gas separation assembly through the exhaust pipe 2. The carburetor 3 is connected to an air filter 9 through the intake pipe 11. The air filter 9 is integrated on the air guide shroud 7. The spark plug 5 extends into the upper inner side of the crankcase 17. A pressure plate is fixed to the front side of the crankcase cover 14 by bolts on the side biased towards the igniter 6. The valve train includes a crankshaft 21 and a cylinder liner 25 embedded in the upper inner side of the crankcase 17. The front side of the crankshaft 21 is connected to a magneto stator assembly 12. The magneto stator assembly 12 includes a rotor with an impeller 13 fixed on it and the stator is fixed to the crankcase cover 14. A starting cup 19 that cooperates with the pull plate assembly 8 is fixed on the impeller 13. The rotation of the starting cup 19 by the pull plate assembly 8 realizes the rotation of the rotor by the impeller 13. During the rotation of the impeller 13, air enters the air guide shroud 7 from the pull plate assembly 8. The upper part of the crankcase 17 is provided with an upper heat sink in a stepped manner, and the bottom of the crankcase cover 14 is provided with a lower heat sink. The exhaust pipe of the crankcase 17 is connected to a muffler 16. The airflow generated by the rotating impeller 13 is guided by the air guide shroud 7 to the air guide plate 1 of the crankcase. The airflow flowing through the upper part of the air guide plate 1 passes through the upper heat sink to achieve heat dissipation and cooling at the cylinder liner 25 at the upper part of the crankcase 17. The airflow flowing through the lower part of the air guide plate 1 passes through the lower heat sink to achieve heat dissipation and cooling at the bottom of the crankcase cover 14. Finally, it is blown out from the exhaust port. The muffler 16 is arranged inside the exhaust port. A trigger 18 is fixedly connected to the crankcase cover 14 by bolts. The trigger 18 is located above the stator of the magneto stator assembly 12.
[0021] The oil-gas separation assembly includes an oil-gas separation channel, the middle of which includes two intercepting uprights. An oil-gas separation labyrinth 20 is provided on one side of the oil-gas separation channel connected to the exhaust pipe 2. The other side of the oil-gas separation channel includes a through hole communicating with the inside of the crankcase cover 14. A breather valve 30 fixed to the crankcase body 17 is provided at the through hole.
[0022] A connecting rod 22 is fixed in the middle of the crankshaft 21. A piston 32 is rotatably connected to the upper end of the connecting rod 22. The piston 32 is slidably connected inside the cylinder liner 25. A timing gear 31 is fixed at the rear end of the crankshaft 21. An oil winch 23 that meshes with the timing gear 31 and a camshaft gear 28 are rotatably connected to the inner wall of the crankshaft housing 17. A cam 27 is fixed on the camshaft gear 28. Two intake and exhaust rocker arms 26 are rotatably connected to the side wall of the crankshaft housing 17. The intake and exhaust rocker arms 26 cooperate with the cam 27. A crankshaft housing rear cover 15 is provided on the rear side of the crankshaft housing 17 corresponding to the timing gear 31. Under the action of combustion of the piston 32, the connecting rod 22 is driven to rotate the crankshaft 21, which in turn drives the camshaft gear 28 to rotate the cam 27. During the process, the cam 27 pushes the two intake and exhaust rocker arms 26 to move asynchronously, which in turn drives the upper rocker arm 33 to swing asynchronously through the valve tappet 24, realizing the movement of the intake and exhaust assembly 29 and realizing the intake and exhaust process of the cylinder liner 25.
[0023] Two valve lifters 24 pass through the upper rear side of the crankcase 17. The lower ends of the valve lifters 24 abut against the upper side of the intake and exhaust rocker arms 26 respectively. Two upper rocker arms 33 are rotatably connected to the upper inner side of the crankcase 17. The rear side of the upper rocker arms 33 is fixed to the valve lifters 24 respectively. An intake and exhaust assembly 29 is provided on the upper front side of the crankcase 17. The upper end of the intake and exhaust assembly 29 cooperates with the front end of the upper rocker arm 33. The spark plug 5 extends to the upper side of the piston 32.
[0024] The intake and exhaust assembly 29 includes an intake valve seat, intake and exhaust valves, an oil baffle, and a spring. Intake valve seats and springs are fitted on the outer sides of both intake and exhaust valves. An oil baffle is provided between the intake valve seat and the spring of one intake and exhaust valve. The spring is located on the outer side of the valve seat. The spring corresponding to the intake and exhaust valve with the oil baffle on the outer side presses on the upper side of the oil baffle. The other spring presses on the upper inner side of the crankcase 17.
[0025] The oil baffle is located at the top of the crankcase 17. The intake and exhaust valves pass through the inside of the crankcase 17. The upper inner side of the crankcase 17 is provided with a connecting cavity that connects the cylinder liner 25 and the carburetor 3. The lower ends of the intake and exhaust valves are located in the connecting cavity. The spark plug 5 extends into the connecting cavity. The upper part of the crankcase 17 is provided with a cylinder head cover above the corresponding intake and exhaust rocker arms 26. The crankcase air guide plate 1 is fixedly connected to the cylinder head cover maintenance cover plate by bolts above the corresponding cylinder head cover. The upper part of the crankcase 17 is provided with an internal airflow compression hole at the corresponding connecting cavity and in the middle of the two intake and exhaust valves.
[0026] An oil guide port 10 is installed on the bottom side of the crankcase cover 14. The oil guide port 10, carburetor 3 and exhaust pipe 2 all extend to the outside of the air guide plate 1 of the case. The muffler 16 is fixedly installed on the crankcase cover 14.
[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A compact gasoline engine assembly, comprising two side-by-side interlocking housing air deflectors (1), wherein an air deflector shroud (7) is connected to the front side of the housing air deflector (1), and an igniter (6) and a spark plug (5) are disposed on the housing air deflector (1), characterized in that: The air guide shroud (7) is provided with a pull plate assembly (8), and the inner side of the housing air guide plate (1) is provided with a fixed combination of crankcase cover (14) and crankcase (17). The crankcase (17) is provided with a valve distribution system. The upper inner side of the connection between the crankcase cover (14) and crankcase (17) is provided with an oil-gas separation assembly. The upper side wall of the crankcase (17) is provided with a carburetor (3). The carburetor (3) is connected to the oil-gas separation assembly through the exhaust pipe (2). The carburetor (3) is connected to an air filter (9) through the intake pipe (11). The spark plug (5) extends into the upper inner side of the crankcase (17). The valve train system includes a crankshaft (21), the front side of which is connected to a magneto stator assembly (12). The magneto stator assembly (12) includes a rotor with an impeller (13) fixed on it and a stator fixed to a crankcase cover (14). The upper part of the crankcase (17) is provided with upper heat sinks that decrease in a stepped manner, and the bottom of the crankcase cover (14) is provided with lower heat sinks. The exhaust pipe of the crankcase (17) is connected to a muffler (16). The crankcase cover (14) is provided with a trigger (18) located above the magneto stator assembly (12), and the upper part of the crankcase body (17) is provided with an internal airflow extrusion hole for the cylinder head.
2. A compact gasoline engine assembly according to claim 1, characterized in that: The front side of the air guide shroud (7) is fixedly installed with a pull plate assembly (8), and the impeller (13) is fixed with a starter cup (19) that cooperates with the pull plate assembly (8).
3. A compact gasoline engine assembly according to claim 1, characterized in that: The crankcase cover (14) is installed on the inner bottom wall of the air guide plate (1) of the housing, the igniter (6) is installed on the side wall of the air guide plate (1) of the housing, and the air filter (9) is integrated on the air guide cover (7).
4. A compact gasoline engine assembly according to claim 1, characterized in that: The oil-gas separation assembly includes an oil-gas separation channel. An oil-gas separation labyrinth (20) is provided on one side of the oil-gas separation channel connected to the exhaust pipe (2). The other side of the oil-gas separation channel includes a through hole communicating with the inside of the crankcase cover (14). A breather valve (30) fixed to the crankcase body (17) is provided at the through hole.
5. A compact gasoline engine assembly according to claim 1, characterized in that: The valve train system also includes a cylinder liner (25) embedded in the upper inner side of the crankcase (17). A connecting rod (22) is fixed in the middle of the crankshaft (21). A piston (32) is rotatably connected to the upper end of the connecting rod (22). The piston (32) is slidably connected in the cylinder liner (25). A timing gear (31) is fixed at the rear end of the crankshaft (21). An oil winch (23) and a camshaft gear (28) that mesh with the timing gear (31) are rotatably connected to the inner wall of the crankcase (17). A cam (27) is fixed on the camshaft gear (28). Two intake and exhaust rocker arms (26) are rotatably connected to the side wall of the crankcase (17). The intake and exhaust rocker arms (26) cooperate with the cam (27). A crankcase rear cover (15) is provided on the rear side of the crankcase (17) corresponding to the timing gear (31).
6. A compact gasoline engine assembly according to claim 5, characterized in that: Two valve lifters (24) pass through the upper rear side of the crankcase (17). The lower ends of the valve lifters (24) abut against the upper side of the intake and exhaust rocker arms (26). Two upper rocker arms (33) are rotatably connected to the inner upper part of the crankcase (17). The rear side of the upper rocker arms (33) is fixed to the valve lifters (24). An intake and exhaust assembly (29) is provided on the front upper part of the crankcase (17). The upper end of the intake and exhaust assembly (29) cooperates with the front end of the upper rocker arm (33). The spark plug (5) extends to the upper side of the piston (32).
7. A compact gasoline engine assembly according to claim 6, characterized in that: The intake and exhaust assembly (29) includes an intake valve seat, intake and exhaust valves, an oil baffle and a spring. The intake valve seat and spring are fitted on the outer sides of both intake and exhaust valves. An oil baffle is provided between the intake valve seat and the spring of one of the intake and exhaust valves. The spring is located on the outer side of the valve seat. The oil baffle is located on the top of the crankcase (17). The intake and exhaust valves pass through the crankcase (17). A connecting cavity is provided on the upper inner side of the crankcase (17) to connect the cylinder liner (25) and the carburetor (3). The lower end of the intake and exhaust valves is located in the connecting cavity. The spark plug (5) extends into the connecting cavity.
8. A compact gasoline engine assembly according to claim 1, characterized in that: An oil guide port (10) is installed on the bottom side of the crankcase cover (14). The oil guide port (10), carburetor (3) and exhaust pipe (2) all extend to the outside of the air guide plate (1) of the case. The muffler (16) is fixedly installed on the crankcase cover (14).