Novel 8-shaped rotary engine intake and exhaust system arrangement structure

Abstract

The invention relates to the technical field of rotor engines, and particularly discloses a novel 8-shaped rotor engine air intake and exhaust system arrangement structure. Comprising a cylinder body, a front cylinder cover, a rear cylinder cover, a crankshaft, a rotor, a valveless air inlet structure and an exhaust structure, wherein the front cylinder cover and the rear cylinder cover are arranged at the two ends of the cylinder body respectively; the crankshaft is rotationally connected between the front cylinder cover and the rear cylinder cover; the rotor is arranged on an eccentric shaft of the crankshaft in a sleeving manner; the exhaust structure comprises an air valve mounted on the cylinder body and a planetary internal tooth cam for driving the air valve to act; in the invention, an air intake and exhaust system with a cylinder cover of a traditional similar in-line engine is abandoned, the problem that the size of the 8-shaped rotary engine in an 8-shaped plane is sharply increased due to the fact that the size of an air intake and exhaust valve in the length direction is too large is avoided, the overall size of the engine is greatly compressed, and the size limitation of a power device with limited installation space on the engine is broken through; and the method can be popularized and applied in a scene with strict size requirements.

Description

Technical Field

[0001] This invention relates to the field of rotary engine technology, and in particular to a novel 8-shaped rotary engine intake and exhaust system arrangement structure. Background Technology

[0002] In the field of engine technology within the automotive machinery industry, the 8-rotor engine, with its unique structure and operating characteristics, has certain potential in power unit applications. As a key component of the engine, the intake and exhaust system's layout directly affects the engine's size, power performance, economic performance, and emissions performance.

[0003] Currently, the intake and exhaust system layout of 8-rotor engines, both domestically and internationally, is mainly similar to that of traditional inline engines with cylinder heads. The intake and exhaust processes are controlled by the opening and closing phases of the intake and exhaust valves. This arrangement, due to the addition of a cylinder head structure similar to that of a traditional inline engine around the 8-rotor plane, results in larger intake and exhaust valve dimensions along the length, leading to a significant increase in the overall size of the 8-rotor engine within the 8-shaped plane. This severely limits the engine's application in power units with limited installation space, hindering its widespread adoption in scenarios with stringent size requirements. Summary of the Invention

[0004] In view of the technical problems mentioned in the background art, the present invention provides a novel 8-shaped rotor engine intake and exhaust system arrangement structure.

[0005] The technical solution adopted in this invention is: a novel intake and exhaust system arrangement structure for an 8-rotor engine, comprising a cylinder block, a front cylinder head and a rear cylinder head respectively mounted at both ends of the cylinder block, a crankshaft rotatably connected between the front and rear cylinder heads, a rotor sleeved on the eccentric shaft of the crankshaft, a valveless intake structure for intake, and an exhaust structure for controlling exhaust. A rear cover is connected to one side of the rear cylinder head. The exhaust structure includes valves mounted on the cylinder block and a planetary internal gear cam that drives the valves. The exhaust structure also includes a valve rocker arm, a valve rocker arm shaft, and a valve rocker arm roller. The valve rocker arm shaft is connected to the cylinder block, the valve rocker arm is sleeved on the valve rocker arm shaft, and the valve rocker arm roller is rotatably connected to the end of the valve rocker arm near the planetary internal gear cam and is in contact with the outer peripheral surface of the planetary internal gear cam. The end of the valve rocker arm away from the valve rocker arm roller is in contact with the valve and is used to transmit the driving force of the planetary internal gear cam to control the valve action.

[0006] A further embodiment of the present invention is that the front cylinder head is fixedly connected to the cylinder block by front cylinder head fastening screws; the rear cylinder head is fixedly connected to the cylinder block by rear cylinder head fastening screws.

[0007] A further embodiment of the present invention is that the valveless intake structure includes an annular intake channel formed on the rear cylinder head and an intake passage formed on the rotor and adapted to the annular intake channel. The annular intake channel is used to guide gas into the rotor and then into the cylinder block and combustion chamber.

[0008] A further embodiment of the present invention is that the exhaust structure includes a valve guide fixed on the cylinder block, a valve installed in the valve guide, a valve seat cooperating with the valve, a valve spring sleeved on the outside of the valve, a valve spring seat fixed at the end of the valve, and a valve lock plate for fixing the valve spring seat. The planetary internal gear cam is mounted on the crankshaft through a planetary internal gear cam mounting seat, and the axis of the valve is parallel to the axis of the rotor.

[0009] A further configuration of the present invention is that a front crankshaft bearing is provided between the crankshaft and the front cylinder head, and a rear crankshaft bearing is provided between the crankshaft and the rear cylinder head; an eccentric outer bearing and an eccentric inner bearing are sleeved on the outside of the eccentric shaft, and a crankshaft bearing is also sleeved on the crankshaft, wherein the crankshaft bearing is limited by a crankshaft bearing retaining spring.

[0010] A further embodiment of the present invention is that the rotor is provided with a rotor radial sealing strip groove and a rotor end face sealing strip groove, a rotor radial sealing strip and a rotor radial sealing strip spring for pressing the rotor radial sealing strip are installed in the rotor radial sealing strip groove, and a rotor radial sealing strip spring plug is provided at the end of the rotor radial sealing strip spring; an inner rotor end face sealing strip, an outer rotor end face sealing strip and a rotor end face sealing strip spring for pressing the sealing strip are installed in the rotor end face sealing strip groove.

[0011] A further embodiment of the present invention is that a spark plug and a fuel injector are installed on the front cylinder head; an exhaust passage is provided on the cylinder block, an exhaust pipe is installed at the exhaust passage, and the exhaust pipe is fixedly connected to the cylinder block by an exhaust pipe fixing screw.

[0012] A further configuration of the present invention is that one end of the crankshaft extends out of the front cylinder head and is fitted with a phase signal wheel, the phase signal wheel is connected to the crankshaft via a phase signal wheel key and is limited by a phase signal wheel retaining ring; a phase sensor seat is fixed on the front cylinder head, and a phase sensor is mounted on the phase sensor seat via a phase sensor fixing screw, the phase sensor corresponding to the phase signal wheel.

[0013] A further configuration of the present invention includes a front cover oil seal at the shaft hole of the front cylinder head and a rear cover oil seal at the shaft hole of the rear cylinder head; a cylinder head oil seal is provided at the junction of the cylinder block with the front and rear cylinder heads, the cylinder head oil seal having an O-ring on the inner side and a spring on the outer side; a front sliding bearing cover is provided on the outer side of the front cylinder head, the front sliding bearing cover being fixed to the front cylinder head by front sliding bearing cover fastening screws, and a retaining ring being provided inside the front sliding bearing cover.

[0014] A further configuration of the present invention includes: an oil pan installed at the bottom of the cylinder block; an oil pan sealing gasket provided between the oil pan and the cylinder block; the oil pan fixed to the cylinder block by oil pan fastening screws; and an oil drain valve provided on the oil pan. A planetary external gear is also fitted onto the crankshaft, connected to the crankshaft via a planetary external gear key and limited by a planetary external gear retainer. An idler shaft is provided on the rear cylinder head, with an idler bearing and an idler gear fitted onto the idler shaft; the idler bearing is limited by an idler inner retainer and an idler outer retainer. A rotor phase external gear shaft is connected to the rotor, with a rotor phase internal gear fitted onto the rotor phase external gear shaft; the rotor phase internal gear meshes with the planetary external gear and the idler gear.

[0015] The beneficial effects of this invention are: This invention abandons the traditional intake and exhaust system with cylinder head similar to an inline engine, avoiding the problem of the 8-shaped rotor engine's size increasing dramatically in the 8-shaped plane due to the excessive length of the intake and exhaust valves. It significantly compresses the overall size of the engine, breaks through the size limitation of the power unit with limited installation space, and enables its application in scenarios with strict size requirements, solving the problem that traditional structures are not conducive to the arrangement of power units in limited space. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the exploded structure of the assembly in this invention. Figure 1 ;

[0018] Figure 3 This is a schematic diagram of the exploded structure of the assembly in this invention. Figure 2 ;

[0019] Figure 4 This is an exploded structural diagram of the cylinder block in this invention;

[0020] Figure 5 This is an exploded structural diagram of the rear cylinder head in this invention;

[0021] Figure 6 This is an exploded structural diagram of the front cylinder head in this invention;

[0022] Figure 7 This is a schematic diagram of the exhaust pipe structure in this invention;

[0023] Figure 8 This is a schematic diagram of the right-angle cross-sectional structure of the present invention.

[0024] The diagram is marked as follows:

[0025] 1. Crankshaft; 2. Main shaft key; 3. Rear cover oil seal; 4. Rear cover; 5. Planetary external gear key; 6. Planetary external gear circlip; 7. Planetary external gear; 8. Idler gear internal circlip; 9. Idler gear bearing; 10. Idler gear external circlip; 11. Idler gear shaft; 12. Idler gear; 13. Planetary internal gear cam; 14. Valve rocker arm roller; 15. Valve rocker arm; 16. Valve rocker arm shaft; 17. Sealing ring; 18. Valve lock plate; 19. Valve spring seat; 20. Valve spring; 21. 22. Rear cylinder head; 23. Rear cylinder head fastening bolts; 24. Intake port; 25. Valve spring washer; 26. Valve guide; 27. Valve seat; 28. Exhaust port; 29. ​​Front cylinder head fastening bolts; 30. Front cylinder head; 31. Spark plug; 32. Injector; 33. Cylinder head oil seal O-ring; 34. Cylinder head oil seal spring; 35. Cylinder head oil seal; 36. Retaining ring; 37. Front sliding bearing cap; 38. Front sliding bearing cap fastening bolts; 39. Eccentric shaft outer bearing shell 40. Front cover oil seal; 41. Phase signal wheel; 42. Phase signal wheel key; 43. Phase signal wheel retaining ring; 44. Eccentric shaft; 45. Eccentric wheel inner bearing; 46. Front crankshaft bearing; 47. Phase sensor mount; 48. Phase sensor; 49. Rotor end face sealing strip spring; 50. Rotor end face inner sealing strip; 51. Rotor end face outer sealing strip; 52. Rotor; 53. Rotor radial sealing strip; 54. Rotor radial sealing strip spring; 55. Rotor radial sealing strip spring. 56. Seal spring plug; 57. Cylinder block; 58. Rotor phase external gear shaft; 59. Rear crankshaft bearing; 60. Rotor phase internal gear; 61. Crankshaft bearing; 62. Crankshaft bearing retainer; 63. Planetary internal gear camshaft mounting base; 64. Oil pan; 65. Oil pan fastening screw; 66. Oil pan gasket; 67. Drain valve; 68. Phase sensor mounting screw; 69. Exhaust pipe mounting screw; 70. Exhaust pipe; 71. Annular intake passage; 72. Intake port. Detailed Implementation

[0026] In the description of this invention, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] The following is in conjunction with the appendix Figure 1-7 The present invention will be further described below.

[0028] To address the problems existing in the background art, this application proposes the following technical solution: a novel 8-rotor engine intake and exhaust system arrangement structure, including a cylinder block 56, a front cylinder head 30 and a rear cylinder head 21 respectively mounted at both ends of the cylinder block 56, a crankshaft 1 rotatably connected between the front cylinder head 30 and the rear cylinder head 21, a rotor 52 sleeved on the eccentric shaft 44 of the crankshaft 1, a valveless intake structure for intake, and an exhaust structure for exhaust control. A rear cover 4 is connected to one side of the rear cylinder head 21, and a sealing ring 17 is provided at the joint between the rear cover 4 and the rear cylinder head 21 to enhance the sealing performance between the rear cover 4 and the rear cylinder head 21 and prevent gas leakage. The exhaust structure includes a valve 26 mounted on the cylinder block 56 and a planetary internal gear cam 13 that drives the valve 26.

[0029] The exhaust structure further includes a valve rocker arm 15, a valve rocker arm shaft 16, and a valve rocker arm roller 14. The valve rocker arm shaft 16 is connected to the cylinder block 56. The valve rocker arm 15 is sleeved on the valve rocker arm shaft 16. The valve rocker arm roller 14 is rotatably connected to the end of the valve rocker arm 15 near the planetary internal gear cam 13 and is in contact with the outer peripheral surface of the planetary internal gear cam 13. The end of the valve rocker arm 15 away from the valve rocker arm roller 14 is in contact with the valve 26 and is used to transmit the driving force of the planetary internal gear cam 13 to control the action of the valve 26.

[0030] The crankshaft 1 is connected to the transmission components via the main shaft key 2 to ensure no relative slippage during power transmission. The valve rocker arm 15 can rotate around the valve rocker arm shaft 16, converting the rotational motion of the planetary internal gear cam 13 into the reciprocating motion of the valve 26 through the lever principle. The crankshaft 1 is connected to the transmission components via the main shaft key 2 to ensure no relative slippage during power transmission. The valve rocker arm 15 can rotate around the valve rocker arm shaft 16, and the valve rocker arm roller 14 rolls with the rotation of the planetary internal gear cam 13, converting the rotational motion of the planetary internal gear cam 13 into the oscillation of the valve rocker arm 15, thereby driving the valve 26 to perform reciprocating motion. The sealing ring 17 is made of temperature and oil resistant material and is adapted to the mating surface shape of the rear cover 4 and the rear cylinder head 21 to further improve the sealing reliability.

[0031] The cylinder block 56 is sealed at both ends by the front cylinder head 30 and the rear cylinder head 21, providing a stable installation space for the crankshaft 1 and the rotor 52. This ensures that the rotor 52 rotates smoothly within the 8-shaped cylinder block to complete the intake and exhaust strokes. The valveless intake structure eliminates the complex transmission of traditional valve intake, reducing intake resistance, improving intake efficiency, and avoiding the intake instability problems caused by jamming and wear that are common with traditional valves. The exhaust structure uses valve 26 in conjunction with a planetary internal gear cam 13. The planetary internal gear cam 13 rotates synchronously with the crankshaft 1, precisely driving the valve 26 to ensure that the exhaust timing is accurately matched with the engine operating conditions. This solves the problems of delayed response and incomplete exhaust in traditional exhaust control mechanisms. Compared with traditional camshaft drives, the planetary internal gear cam structure provides smoother transmission, lower noise, and extends the service life of the exhaust system.

[0032] In this embodiment, the front cylinder head 30 is fixedly connected to the cylinder block 56 by the front cylinder head fastening screws 29; the rear cylinder head 21 is fixedly connected to the cylinder block 56 by the rear cylinder head fastening screws 22. The front cylinder head fastening screws 29 and the rear cylinder head fastening screws 22 can provide uniform and stable preload force, ensuring that the front cylinder head 30, the rear cylinder head 21 and the cylinder block 56 fit tightly together, preventing the end caps from loosening due to vibration, further ensuring sealing reliability. At the same time, the screw connection facilitates later disassembly and maintenance. When it is necessary to inspect the internal components of the cylinder block, the end caps can be separated simply by removing the screws, which is convenient and reduces maintenance costs.

[0033] In this embodiment, the valveless intake structure includes an annular intake channel 70 formed on the rear cylinder head 21 and an intake port 71 formed on the rotor 52 and adapted to the annular intake channel. The annular intake channel is used to guide gas into the rotor 52, and then into the cylinder block 56 and combustion chamber. The annular intake channel 70 is arranged around the rear cylinder head 21, which can realize the uniform introduction of gas in an annular shape, avoiding the problem of uneven intake caused by traditional single-hole intake, so that the gas forms a stable airflow before entering the rotor 52, improving intake efficiency. The intake port is adapted to the annular intake channel. When the rotor 52 rotates to a specific position, the intake port and the annular intake channel are connected to achieve precise intake control. There is no need for the opening and closing action of traditional valves, reducing energy loss during the intake process, and avoiding wear of valves and valve seats, thus reducing the failure rate. The gas enters the combustion chamber through the inside of rotor 52, which reduces heat loss during the gas transmission process, keeps the gas temperature stable, and is conducive to improving subsequent combustion efficiency, thus solving the problem of incomplete combustion caused by heat loss in traditional intake systems.

[0034] In this embodiment, the exhaust structure further includes a valve guide 25 fixed to the cylinder block 56, a valve 26 installed within the valve guide 25, a valve seat 27 cooperating with the valve 26, a valve spring 20 sleeved on the outside of the valve 26, a valve spring seat 19 fixed to the end of the valve 26, and a valve lock plate 18 for fixing the valve spring seat 19. The planetary internal gear cam 13 is mounted on the crankshaft 1 via a planetary internal gear cam fixing seat 62. The axis of the valve 26 is parallel to the axis of the rotor 52. The valve guide 25 provides precise guidance for the valve 26, ensuring that the valve 26 reciprocates along the axial direction, avoiding valve misalignment leading to poor sealing or wear with the valve seat 27, and extending the service life of the valve 26. The valve seat 27 fits tightly with the valve 26, enhancing the sealing performance of the exhaust port, preventing gas leakage during compression and power strokes, and ensuring engine power output. The valve spring 20, through its own elasticity, enables the valve 26 to quickly return to its original position after exhaust, ensuring timely closure of the valve 26 and preventing exhaust lag from affecting intake efficiency. The valve lock plate 18 securely fixes the valve spring seat 19, preventing the valve spring seat 19 from loosening and causing the valve spring 20 to fail. The planetary internal gear cam 13 rotates synchronously with the crankshaft 1, precisely controlling the opening range and timing of the valve 26 according to the crankshaft speed, adapting to exhaust requirements under different operating conditions. The axis of the valve 26 is parallel to the axis of the rotor 52, making the exhaust direction more coordinated with the rotor's movement direction, reducing exhaust resistance, and improving exhaust completeness.

[0035] In this embodiment, a front crankshaft bearing 46 is provided between the crankshaft 1 and the front cylinder head 30, and a rear crankshaft bearing 58 is provided between the crankshaft 1 and the rear cylinder head 21. An outer eccentric bearing 39 and an inner eccentric bearing 45 are fitted around the eccentric shaft 44. A crankshaft bearing 60 is also fitted onto the crankshaft 1, and the crankshaft bearing 60 is limited by a crankshaft bearing retaining ring 61. The front crankshaft bearing 46 and the rear crankshaft bearing 58 respectively reduce the friction between the crankshaft 1 and the front cylinder head 30 and the rear cylinder head 21, reducing energy loss during crankshaft 1 rotation. They also support the crankshaft 1, ensuring its stability during high-speed rotation and preventing crankshaft 1 from shifting due to vibration. The outer bearing shell 39 of the eccentric shaft and the inner bearing shell 45 of the eccentric wheel enclose the eccentric shaft 44, reducing friction between the eccentric shaft 44 and the rotor 52. This allows the rotor 52 to rotate smoothly around the eccentric shaft 44, improving the stability of rotor movement, preventing component wear due to excessive friction, and extending the service life of the eccentric shaft and rotor. The crankshaft bearing 60 further enhances the support stability of the crankshaft 1, and the crankshaft bearing retainer 61 prevents the crankshaft bearing 60 from shifting during the rotation of the crankshaft 1, ensuring that the bearing is always in the correct working position, guaranteeing the overall operational reliability of the crankshaft 1, and solving the problems of instability and easy wear in traditional crankshaft support structures.

[0036] In this embodiment, the rotor 52 is provided with a rotor radial sealing strip groove and a rotor end face sealing strip groove. A rotor radial sealing strip 53 and a rotor radial sealing strip spring 54 for tightening the rotor radial sealing strip 53 are installed in the rotor radial sealing strip groove. A rotor radial sealing strip spring plug 55 is provided at the end of the rotor radial sealing strip spring 54. An inner rotor end face sealing strip 50, an outer rotor end face sealing strip 51, and a rotor end face sealing strip spring 49 for tightening the sealing strip are installed in the rotor end face sealing strip groove. The rotor radial sealing strip groove provides installation space for the rotor radial sealing strip 53 and the rotor radial sealing strip spring 54. The rotor radial sealing strip spring 54 can continuously provide a tightening force to the rotor radial sealing strip 53, ensuring that the rotor radial sealing strip 53 always fits tightly against the inner wall of the cylinder block 56, blocking gas leakage between combustion chambers, ensuring stable pressure in each combustion chamber, and improving engine power output efficiency. The rotor radial sealing strip spring plug 55 can fix the spring position and prevent spring displacement leading to insufficient tightening force. The inner sealing strip 50 and the outer sealing strip 51 of the rotor end face seal the inner and outer end faces of the rotor 52 respectively. With the tightening action of the rotor end face sealing strip spring 49, gas can be effectively prevented from leaking from the gap between the rotor end face and the front and rear cylinder heads.

[0037] In this embodiment, a spark plug 31 and a fuel injector 32 are installed on the front cylinder head 30; an exhaust passage is provided on the cylinder block 56, and an exhaust pipe 69 is installed at the exhaust passage. The exhaust pipe 69 is fixedly connected to the cylinder block 56 by an exhaust pipe fixing screw 68. The spark plug 31, installed on the front cylinder head 30, can be precisely aligned with the combustion chamber, ensuring accurate ignition timing, uniform flame propagation, improved combustion efficiency, and avoiding incomplete combustion caused by ignition position deviation. Simultaneously, the installation position of the front cylinder head 30 facilitates the later maintenance and replacement of the spark plug 31. The fuel injector 32, installed on the front cylinder head 30, can precisely control the fuel injection quantity and timing according to engine operating conditions, ensuring thorough mixing of fuel and air, reducing fuel waste, lowering exhaust emissions, and solving the problems of high fuel consumption and significant pollution caused by uneven fuel injection in traditional fuel injection systems. The exhaust passage on cylinder block 56 can quickly guide the exhaust gas after combustion out. The exhaust pipe 69 is connected to the exhaust passage to vent the exhaust gas to the outside of the engine. The exhaust pipe fixing screw 68 can ensure that the exhaust pipe 69 is installed firmly to avoid exhaust gas leakage and noise or pollution. At the same time, it is convenient to disassemble and maintain the exhaust pipe 69. When the exhaust pipe is blocked or damaged, it can be quickly replaced.

[0038] In this embodiment, one end of the crankshaft 1 extends out of the front cylinder head 30 and is fitted with a phase signal wheel 41. The phase signal wheel 41 is connected to the crankshaft 1 via a phase signal wheel key 42 and is limited by a phase signal wheel retaining ring 43. A phase sensor seat 47 is fixed on the front cylinder head 30, and a phase sensor 48 is mounted on the phase sensor seat 47 via a phase sensor fixing screw 67. The phase sensor 48 corresponds to the phase signal wheel 41. The phase signal wheel 41 rotates synchronously with the crankshaft 1. The phase signal wheel key 42 ensures no relative sliding with the crankshaft 1, and the phase signal wheel retaining ring 43 prevents the phase signal wheel 41 from shifting axially during rotation, ensuring the stability of the signal wheel position. The phase sensor 48 is mounted on the phase sensor mount 47, corresponding to the phase signal wheel 41. It can collect the rotational speed and phase signal of the crankshaft 1 in real time and transmit the signal to the engine controller. The controller accurately controls the timing of ignition, fuel injection and exhaust according to the signal, so as to realize the coordinated work of various engine systems. It solves the problem of ignition and fuel injection lag caused by inaccurate traditional phase detection, and improves the stability and power performance of engine operation. The phase sensor mount 47 and the phase sensor fixing screw 67 ensure that the phase sensor 48 is firmly installed and the detection signal is stable and reliable.

[0039] In this embodiment, a front cover oil seal 40 is provided at the shaft hole of the front cylinder head 30, and a rear cover oil seal 3 is provided at the shaft hole of the rear cylinder head 21; a cylinder head oil seal 35 is provided at the junction of the cylinder block 56 with the front cylinder head 30 and the rear cylinder head 21, with a cylinder head oil seal O-ring 33 on the inner side and a cylinder head oil seal spring 34 on the outer side; a front sliding bearing cover 37 is provided on the outer side of the front cylinder head 30, and the front sliding bearing cover 37 is fixed to the front cylinder head 30 by a front sliding bearing cover fastening screw 38, with a retaining ring 36 inside the front sliding bearing cover 37. The front cover oil seal 40 and the rear cover oil seal 3 respectively seal the shaft holes of the front cylinder head 30 and the rear cylinder head 21, preventing oil leakage from the gap between the crankshaft 1 and the shaft hole, avoiding oil loss and environmental pollution, while maintaining a stable oil level inside the engine and ensuring the lubrication effect of each component. The cylinder head oil seal 35, together with the inner cylinder head oil seal O-ring 33 and the outer cylinder head oil seal spring 34, effectively seals the joint between the cylinder block 56 and the front and rear cylinder heads. This double-sealing structure enhances sealing reliability and prevents leakage of fuel gas, coolant, and engine oil. The tightening action of the cylinder head oil seal spring 34 ensures the oil seal remains tightly fitted to the sealing surface, adapting to vibrations and thermal deformation during engine operation. The front sliding bearing cap 37 is fixed to the outside of the front cylinder head 30 with screws, providing axial restraint for the front crankshaft bearing 46 and preventing bearing displacement. The retaining ring 36 further enhances the restraining effect of the bearing cap.

[0040] In this embodiment, an oil pan 63 is installed at the bottom of the cylinder block 56, and an oil pan sealing gasket 65 is provided between the oil pan 63 and the cylinder block 56. The oil pan 63 is fixed to the cylinder block 56 by an oil pan fastening screw 64, and an oil drain valve 66 is provided on the oil pan 63. A planetary external gear 7 is also sleeved on the crankshaft 1. The planetary external gear 7 is connected to the crankshaft 1 by a planetary external gear key 5 and is limited by a planetary external gear snap ring 6. An idler shaft 11 is provided on the rear cylinder head 21. An idler bearing 9 and an idler gear 12 are sleeved on the idler shaft 11. The idler bearing 9 is limited by an idler inner snap ring 8 and an idler outer snap ring 10. A rotor phase external gear shaft 57 is connected to the rotor 52. A rotor phase internal gear 59 is sleeved on the rotor phase external gear shaft 57. The rotor phase internal gear 59 meshes with the planetary external gear 7 and the idler gear 12. The oil pan 63 is installed at the bottom of the cylinder block 56 to store engine oil and provide lubrication for all engine components. The oil pan gasket 65 prevents oil leakage from the gap between the oil pan and the cylinder block. The oil pan fastening screw 64 ensures the oil pan is securely installed. The drain valve 66 facilitates regular oil changes, making operation convenient without disassembling the entire oil pan. The planetary external gear 7 rotates synchronously with the crankshaft 1. The planetary external gear key 5 and snap ring 6 ensure a stable connection with the crankshaft 1, with no relative movement. The idler gear 12 on the idler shaft 11 rotates smoothly through the idler gear bearing 9. The inner snap ring 8 and outer snap ring 10 of the idler gear prevent the idler gear bearing 9 from shifting. The idler gear 12 transmits power, allowing the planetary external gear 7 to mesh precisely with the rotor phase internal gear 59. This ensures that the phase of the rotor 52 matches the speed of the crankshaft 1, guaranteeing precise timing of engine intake and exhaust, ignition, and fuel injection, and solving the problems of excessive meshing clearance and unstable power transmission that are common in traditional gear drives.

[0041] The method used in this embodiment is as follows:

[0042] First, check the installation of each component of the equipment, ensuring that the front cylinder head 30 and rear cylinder head 21 are securely fixed to the cylinder block 56 with the corresponding fastening screws. Add sufficient suitable engine oil to the oil pan 63 and close the drain valve 66. Start the engine, intake port 23 intakes air, crankshaft 1 begins to rotate, driving phase signal wheel 41 to rotate synchronously. Phase sensor 48 collects phase signals and transmits them to the controller. The controller controls the injector 32 to inject fuel into the combustion chamber and the spark plug 31 to ignite the fuel according to the signal. Simultaneously, crankshaft 1 drives planetary external gear 7 to rotate, which in turn drives rotor phase internal gear 59 to rotate via idler gear 12, causing rotor 52 to rotate around eccentric shaft 44 within cylinder block 56. When rotor 52 rotates to the point where the intake port connects with the annular intake passage of rear cylinder head 21, gas enters the cylinder block and combustion chamber through the annular intake passage and rotor to complete intake. After the compression stroke, spark plug 31 ignites the mixture to burn and do work, pushing rotor 52 to continue rotating. When rotor 52 rotates to the corresponding exhaust port position, planetary internal gear cam 13 drives valve 26 to open, and the exhaust gas after combustion is discharged through exhaust passage, exhaust port 28, and exhaust pipe 69. Valve spring 20 drives valve 26 to reset and close the exhaust port, completing one working cycle. During operation, monitor the oil level and whether there are any leaks in the sealing parts in real time. If maintenance is required, stop the machine first, remove the fastening screws of the corresponding parts (such as the front cylinder head fastening screw 29, the exhaust pipe fixing screw 68, etc.), replace the damaged parts (such as the sealing strip, spark plug 31, etc.), and reinstall and fix them. After checking that everything is correct, the machine can be started again.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] Although embodiments of the invention have been shown and described, the scope of the invention will be defined by the appended claims and their equivalents by those skilled in the art.

Claims

1. A novel intake and exhaust system arrangement structure for an 8-shaped rotary engine, characterized in that, The system includes a cylinder block (56), a front cylinder head (30) and a rear cylinder head (21) respectively mounted at both ends of the cylinder block (56), a crankshaft (1) rotatably connected between the front cylinder head (30) and the rear cylinder head (21), a rotor (52) sleeved on the eccentric shaft (44) of the crankshaft (1), a valveless intake structure for intake, and an exhaust structure for exhaust control. A rear cover (4) is connected to one side of the rear cylinder head (21). The exhaust structure includes valves (26) mounted on the cylinder block (56) and a planetary internal gear cam (13) that drives the valves (26). The front cylinder head (30) is fixedly connected to the cylinder block (56) by front cylinder head fastening screws (29). The cover (21) is fixedly connected to the cylinder block (56) by the rear cylinder head fastening screws (22); the exhaust structure also includes a valve rocker arm (15), a valve rocker arm shaft (16) and a valve rocker arm roller (14). The valve rocker arm shaft (16) is connected to the cylinder block (56), the valve rocker arm (15) is sleeved on the valve rocker arm shaft (16), and the valve rocker arm roller (14) is rotatably connected to the end of the valve rocker arm (15) near the planetary internal gear cam (13) and is in contact with the outer peripheral surface of the planetary internal gear cam (13). The end of the valve rocker arm (15) away from the valve rocker arm roller (14) is in contact with the valve (26) to transmit the driving force of the planetary internal gear cam (13) to control the valve (26) action.

2. The novel 8-shaped rotor engine intake and exhaust system arrangement structure according to claim 1, characterized in that, The valveless intake structure includes an annular intake channel (71) on the rear cylinder head (21) and an intake port (71) on the rotor (52) that is adapted to the annular intake channel (70). The annular intake channel is used to introduce gas into the rotor (52) and then into the cylinder block (56) and combustion chamber.

3. The novel 8-shaped rotor engine intake and exhaust system arrangement structure according to claim 2, characterized in that, The exhaust structure also includes a valve guide (25) fixed on the cylinder block (56), a valve (26) installed in the valve guide (25), a valve seat (27) cooperating with the valve (26), a valve spring (20) sleeved on the outside of the valve (26), a valve spring seat (19) fixed at the end of the valve (26), and a valve lock plate (18) for fixing the valve spring seat (19). The planetary internal gear cam (13) is mounted on the crankshaft (1) through the planetary internal gear cam mounting seat (62), and the axis of the valve (26) is parallel to the axis of the rotor (52).

4. The novel 8-shaped rotor engine intake and exhaust system arrangement structure according to claim 3, characterized in that, A front crankshaft bearing (46) is provided between the crankshaft (1) and the front cylinder head (30), and a rear crankshaft bearing (58) is provided between the crankshaft (1) and the rear cylinder head (21); an eccentric outer bearing (39) and an eccentric inner bearing (45) are sleeved on the outside of the eccentric shaft (44), and a crankshaft bearing (60) is also sleeved on the crankshaft (1), and the crankshaft bearing (60) is limited by a crankshaft bearing retaining ring (61).

5. The novel 8-shaped rotor engine intake and exhaust system arrangement structure according to claim 4, characterized in that, The rotor (52) is provided with a rotor radial sealing strip groove and a rotor end face sealing strip groove. A rotor radial sealing strip (53) and a rotor radial sealing strip spring (54) for tightening the rotor radial sealing strip (53) are installed in the rotor radial sealing strip groove. A rotor radial sealing strip spring plug (55) is provided at the end of the rotor radial sealing strip spring (54). An inner rotor end face sealing strip (50), an outer rotor end face sealing strip (51), and a rotor end face sealing strip spring (49) for tightening the sealing strip are installed in the rotor end face sealing strip groove.

6. The novel 8-shaped rotor engine intake and exhaust system arrangement structure according to claim 5, characterized in that, Spark plugs (31) and fuel injectors (32) are installed on the front cylinder head (30); an exhaust passage is provided on the cylinder block (56), and an exhaust pipe (69) is installed at the exhaust passage. The exhaust pipe (69) is fixedly connected to the cylinder block (56) by an exhaust pipe fixing screw (68).

7. The novel 8-shaped rotary engine intake and exhaust system arrangement structure according to claim 6, characterized in that, One end of the crankshaft (1) extends out of the front cylinder head (30) and is fitted with a phase signal wheel (41). The phase signal wheel (41) is connected to the crankshaft (1) through a phase signal wheel key (42) and is limited by a phase signal wheel retaining ring (43). A phase sensor seat (47) is fixed on the front cylinder head (30). A phase sensor (48) is installed on the phase sensor seat (47) through a phase sensor fixing screw (67). The phase sensor (48) corresponds to the phase signal wheel (41).

8. The novel 8-shaped rotor engine intake and exhaust system arrangement structure according to claim 7, characterized in that, A front cover oil seal (40) is provided at the shaft hole of the front cylinder head (30), and a rear cover oil seal (3) is provided at the shaft hole of the rear cylinder head (21); a cylinder head oil seal (35) is provided at the junction of the cylinder body (56) with the front cylinder head (30) and the rear cylinder head (21), and a cylinder head oil seal O-ring (33) is provided on the inner side of the cylinder head oil seal (35), and a cylinder head oil seal spring (34) is provided on the outer side; a front sliding bearing cover (37) is provided on the outer side of the front cylinder head (30), and the front sliding bearing cover (37) is fixed to the front cylinder head (30) by a front sliding bearing cover fastening screw (38), and a retaining ring (36) is provided inside the front sliding bearing cover (37).

9. The novel 8-shaped rotor engine intake and exhaust system arrangement structure according to claim 8, characterized in that, An oil pan (63) is installed at the bottom of the cylinder block (56). An oil pan sealing gasket (65) is provided between the oil pan (63) and the cylinder block (56). The oil pan (63) is fixed to the cylinder block (56) by oil pan fastening screws (64). An oil drain valve (66) is provided on the oil pan (63). A planetary external gear (7) is also fitted on the crankshaft (1). The planetary external gear (7) is connected to the crankshaft (1) by a planetary external gear key (5) and limited by a planetary external gear snap ring (6). The rear cylinder head (21) is provided with an idler shaft (11), and an idler bearing (9) and an idler wheel (12) are sleeved on the idler shaft (11). The idler bearing (9) is limited by an inner idler snap ring (8) and an outer idler snap ring (10). The rotor (52) is connected to a rotor phase external gear shaft (57), and a rotor phase internal gear (59) is sleeved on the rotor phase external gear shaft (57). The rotor phase internal gear (59) meshes with the planetary external gear (7) and the idler wheel (12).

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