A detachable cooling system for a rotary opposed piston engine

Abstract

This invention relates to the field of internal combustion engine technology and discloses a detachable cooling system for a rotary opposed piston engine, including a cylinder head and a water jacket cover. The cylinder head has a cylinder head shaft hole at its axial center, and the water jacket cover has a water jacket cover shaft hole at its axial center. A cylinder head cooling water groove is formed on the outer surface of the cylinder head, and a water jacket cover cooling water groove is formed on the inner surface of the water jacket cover to mate with the cylinder head cooling water groove. The cylinder head and water jacket cover are connected by a connector after mating. The cylinder head cooling water groove and the water jacket cover cooling water groove form a cooling channel. The water jacket cover has an inlet hole and an outlet hole. This invention can cool the cylinder block of a rotary opposed piston engine through the inlet hole and outlet hole of the water jacket cover, and the cooling channel formed by the cylinder head and water jacket cover. Furthermore, the structural processing does not require casting, greatly reducing the manufacturing cost of the rotary opposed piston engine.

Description

Technical Field

[0001] This invention relates to the field of internal combustion engine technology, and more specifically, to a detachable cooling system for a rotary opposed piston engine. Background Technology

[0002] With the advocacy of sustainable development, miniaturization, high efficiency, and high power density have become the development trends of internal combustion engines. The rotary opposed piston engine (ZL202110407190.9) has attracted much attention due to its simple structure and high power density. Compared to traditional reciprocating piston engines, the rotary opposed piston engine has twice the power frequency at the same engine speed. Therefore, under the same engine speed conditions, the theoretical power density of the rotary opposed piston engine is approximately twice that of the traditional reciprocating piston engine, effectively achieving miniaturization and weight reduction of internal combustion engines. Furthermore, the rotary opposed piston engine has no crankshaft and connecting rod mechanism, resulting in a simple structure, smooth operation, and low noise. Unlike reciprocating piston engines, the rotary opposed piston engine has separate intake and exhaust valves, which can greatly increase the intake and exhaust valve area and improve the quality of air exchange. Compared to traditional engines, under the same displacement conditions, it can effectively overcome the bottleneck of significantly increasing power output.

[0003] In a rotary opposed piston engine, two pairs of opposed pistons move at different speeds along an annular track within the cylinder. This differential motion causes the combustion chamber to follow an intake-compression-expansion-exhaust cycle, consistent with the operating mode of a four-stroke engine. Fuel combustion within the combustion chamber generates a significant amount of heat. To ensure reliable engine operation, a well-designed cooling system is necessary to reduce the thermal load on the cylinder block.

[0004] However, as the rotary opposed piston engine is a new type of engine, there are no reports or documents that describe the cooling structure design of the cylinder block of the rotary opposed piston engine.

[0005] Therefore, providing a detachable cooling system for a rotary opposed piston engine is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention proposes a detachable cooling system for a rotary opposed piston engine, which enables coolant to flow inside the system, thereby achieving cooling of the engine block. At the same time, the detachable structure design avoids the casting cost of the traditional integrated cylinder block and reduces manufacturing costs.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A detachable cooling system for a rotary opposed piston engine includes:

[0009] The cylinder head has a cylinder head shaft hole at its axial center position. The outer surface of the cylinder head has a first cooling water groove, a second cooling water groove, and a third cooling water groove sequentially formed along the outer circumference towards the cylinder head shaft hole. A first contact surface is provided on the outer circumference of the first cooling water groove. A second contact surface is provided between the first and second cooling water grooves. A third cooling water groove is provided between the second and third cooling water grooves. The cylinder head has a third mating surface, and a fourth mating surface is provided on the inner ring of the third cooling water groove of the cylinder head. A cylinder head partition boss and a spark plug boss, intersecting the three cylinder head cooling water grooves, are also provided on the outer surface of the cylinder head. A cylinder head water inlet groove is provided on one side of the cylinder head partition boss on both the second and third mating surfaces, and a cylinder head water outlet groove is provided on the other side of the same surface. A spark plug mounting hole is provided on the spark plug boss.

[0010] A water jacket cover has a centrally located axial hole. The inner surface of the water jacket cover has a first cooling water groove, a second cooling water groove, and a third cooling water groove sequentially arranged along its outer circumference towards the central hole. The outer circumference of the first cooling water groove has a first contact surface. A second contact surface is provided between the first and second cooling water grooves. A third contact surface is provided between the second and third cooling water grooves. The inner circumference of the third cooling water groove has a fourth contact surface. The inner surface of the water jacket cover has three... The water jacket cover has a cooling water groove that intersects with the cylinder head partition boss and corresponds to the position of the cylinder head partition boss. On both sides of the water jacket cover partition groove are water jacket cover inlet grooves corresponding to the cylinder head water inlet groove and water jacket cover outlet grooves corresponding to the cylinder head water outlet groove. Below the first mating surface of the water jacket cover are water inlet holes connecting the water jacket cover inlet groove to the outside and water outlet holes connecting the water jacket cover outlet groove to the outside. The inner side of the water jacket cover also has a notch corresponding to the spark plug boss. The cylinder head and the water jacket cover are connected by a connecting piece after concentric mating through the cylinder head shaft hole and the water jacket cover shaft hole, and surface mating through their corresponding mating surfaces.

[0011] Preferably, the first cooling water groove of the cylinder head and the first cooling water groove of the water jacket cover cooperate to form a first cooling water channel, the second cooling water groove of the cylinder head and the second cooling water groove of the water jacket cover cooperate to form a second cooling water channel, and the third cooling water groove of the cylinder head and the third cooling water groove of the water jacket cover cooperate to form a third cooling water channel; the four mating surfaces on the cylinder head and the four mating surfaces on the water jacket cover separate the first cooling water channel, the second cooling water channel, and the third cooling water channel.

[0012] Preferably, the spark plug boss has several water channel through holes inside, which are respectively used to connect the first cooling water channel, the second cooling water channel and the third cooling water channel on both sides of the spark plug boss.

[0013] Preferably, the cylinder head water inlet groove and the water jacket cover water inlet groove cooperate and connect to the inlets of the first cooling water channel, the second cooling water channel, and the third cooling water channel; the cylinder head water outlet groove and the water jacket cover water outlet groove cooperate and connect to the outlets of the first cooling water channel, the second cooling water channel, and the third cooling water channel.

[0014] Preferably, the first and third mating surfaces of the cylinder head are provided with a plurality of equidistant through threaded holes I, and the center line connecting all the through threaded holes I forms a circle; the first and fourth mating surfaces of the water jacket are provided with a plurality of equidistant through threaded holes II, and the center line connecting all the through threaded holes II forms a circle; the connecting screw passes through the corresponding through threaded holes I and through threaded holes II in sequence to connect the cylinder head and the water jacket.

[0015] Preferably, a sealing ring groove 1 is formed on the first mating surface of the cylinder head and the fourth mating surface of the cylinder head, and a sealing ring groove 2 corresponding to the sealing ring groove 1 is formed on the first mating surface of the water jacket and the fourth mating surface of the water jacket.

[0016] Preferably, the surface of the cylinder head partition boss is provided with a sealing ring groove three, and the surface of the water jacket partition groove is provided with a sealing ring groove four that mates with the sealing ring groove three.

[0017] Preferably, the spark plug boss has sealing ring grooves on both sides of its surface.

[0018] Preferably, the two ends of the cylinder head partition boss are respectively connected to the first mating surface of the cylinder head and the fourth mating surface of the cylinder head, and the two ends of the spark plug boss are respectively flush with the outer peripheral surface of the cylinder head and the inner peripheral surface of the cylinder head shaft hole.

[0019] Given the symmetrical structure of the cylinder blocks on both sides of the rotary opposed piston engine, in practical applications, the present invention provides a detachable cooling system for a rotary opposed piston engine in two sets, which are respectively installed on the cylinder blocks on both sides of the rotary opposed piston engine.

[0020] By adopting the above technical solutions, the beneficial effects of the present invention are as follows:

[0021] This invention enables the cooling of the cylinder block of a rotary opposed piston engine through the water inlet and outlet holes on the water jacket cover and the cooling water channel formed by the cylinder head and the water jacket cover in conjunction. Furthermore, the cooling system structure designed in this invention does not require casting and can be realized by machining, which greatly reduces the manufacturing cost of rotary opposed piston engines. This cooling system structure is particularly suitable for the repeated iterative design of prototypes during the research and development of rotary opposed piston engines. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 The attached figure is a schematic diagram of the assembly structure of a detachable cooling system for a rotary opposed piston engine provided by the present invention.

[0024] Figure 2 The attached figure is a cross-sectional view of the assembly structure of a detachable cooling system for a rotary opposed piston engine provided by the present invention.

[0025] Figure 3 The attached figure is an exploded view of the structure of a detachable cooling system for a rotary opposed piston engine provided by the present invention;

[0026] Figure 4 The attached figure is a front view of the cylinder head provided by the present invention;

[0027] Figure 5 The attached figure is an isometric view of the cylinder head provided by the present invention;

[0028] Figure 6 The attached figure is a front view of the water jacket cover provided by the present invention;

[0029] Figure 7 The attached figure is an isometric view of the water jacket cover (with connecting screws) provided by the present invention;

[0030] In the picture:

[0031] 100-Cylinder head,

[0032] 101-Cylinder head shaft hole, 102-Cylinder head first cooling water groove, 103-Cylinder head second cooling water groove, 104-Cylinder head third cooling water groove, 105-Cylinder head first mating surface, 106-Cylinder head second mating surface, 107-Cylinder head third mating surface, 108-Cylinder head fourth mating surface, 109-Cylinder head partition boss, 110-Spark plug boss, 111-Cylinder head water inlet groove, 112-Cylinder head water outlet groove, 113-Spark plug mounting hole, 114-Through threaded hole one, 115-Sealing ring groove one, 116-Water passage through hole, 117-Sealing ring groove three, 118-Sealing ring groove five;

[0033] 200-water jacket cover,

[0034] 201-Water jacket cover shaft hole, 202-Water jacket cover first cooling water tank, 203-Water jacket cover second cooling water tank, 204-Water jacket cover third cooling water tank, 205-Water jacket cover first mating surface, 206-Water jacket cover second mating surface, 207-Water jacket cover third mating surface, 208-Water jacket cover fourth mating surface, 209-Water jacket cover partition groove, 210-Water jacket cover inlet groove, 211-Water jacket cover outlet groove, 212-Inlet hole, 213-Outlet hole, 214-Through threaded hole two, 215-Sealing ring groove two, 216-Sealing ring groove four;

[0035] 300 - Connecting screw. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] Example:

[0040] like Figures 1-7 As shown, an embodiment of the present invention discloses a detachable cooling system for a rotary opposed piston engine, comprising:

[0041] A cylinder head 100 has a cylinder head shaft hole 101 at its axial center position. A first cooling water groove 102, a second cooling water groove 103, and a third cooling water groove 104 are sequentially formed on the outer surface of the cylinder head 100 along the outer ring towards the cylinder head shaft hole 101. A first contact surface 105 is provided on the outer ring of the first cooling water groove 102. A second contact surface 106 is provided between the first cooling water groove 102 and the second cooling water groove 103. A third contact surface 107 is provided between the second cooling water groove 103 and the third cooling water groove 104. A fourth contact surface 108 is provided on the inner ring of the third cooling water groove 104. The outer surface of the cylinder head 100 is also provided with a cylinder head partition boss 109 and a spark plug boss 110 intersecting with three cylinder head cooling water grooves; a cylinder head water inlet groove 111 is provided on the cylinder head second mating surface 106 and cylinder head third mating surface 107 on one side of the cylinder head partition boss 109, and a cylinder head water outlet groove 112 is provided on the cylinder head second mating surface 106 and cylinder head third mating surface 107 on the other side; a spark plug mounting hole 113 is provided on the spark plug boss 110 for installing spark plugs; the two ends of the cylinder head partition boss 109 are respectively connected to the cylinder head first mating surface 105 and cylinder head fourth mating surface 108, and the two ends of the spark plug boss 110 are respectively flush with the outer peripheral surface of the cylinder head and the inner peripheral surface of the cylinder head shaft hole.

[0042] A water jacket cover 200 has a water jacket cover shaft hole 201 at its central position along the axial direction. The inner surface of the water jacket cover 200 has a first cooling water tank 202, a second cooling water tank 203, and a third cooling water tank 204 sequentially formed along the outer ring of the water jacket cover towards the water jacket cover shaft hole 201. A first contact surface 205 is provided on the outer ring of the first cooling water tank 202. A second contact surface 206 is provided between the first cooling water tank 202 and the second cooling water tank 203. A third contact surface is provided between the second cooling water tank 203 and the third cooling water tank 204. 207. The inner ring of the third cooling water tank 204 of the water jacket cover is provided with the fourth mating surface 208 of the water jacket cover; the inner side of the water jacket cover 200 is provided with a water jacket cover partition groove 209 that intersects with the three water jacket cover cooling water tanks and corresponds to the position of the cylinder head partition boss 109; the two sides of the water jacket cover partition groove 209 are respectively provided with a water jacket cover inlet groove 210 corresponding to the cylinder head inlet groove 111 and a water jacket cover outlet groove 211 corresponding to the cylinder head outlet groove 112; the lower part of the first mating surface 205 of the water jacket cover is provided with an inlet hole 212 that connects the water jacket cover inlet groove 210 to the outside and an outlet hole 213 that connects the water jacket cover outlet groove 211 to the outside.

[0043] In this invention, the cylinder head partition boss 109 cooperates with the water jacket cover partition groove 209 to partition the water inlet hole 212 and the water outlet hole 213.

[0044] Meanwhile, in this invention, the inner side of the water jacket cover 200 is also provided with a notch corresponding to the spark plug boss 110.

[0045] More specifically, the first cooling water groove 102 of the cylinder head and the first cooling water groove 202 of the water jacket cover form a first cooling water channel through surface mating; the second cooling water groove 103 of the cylinder head and the second cooling water groove 203 of the water jacket cover form a second cooling water channel through surface mating; and the third cooling water groove 104 of the cylinder head and the third cooling water groove 204 of the water jacket cover form a third cooling water channel through surface mating. The four mating surfaces on the cylinder head 100 and the four mating surfaces on the water jacket cover 200 separate the first cooling water channel, the second cooling water channel, and the third cooling water channel.

[0046] The spark plug boss 110 has several water channel through holes 116 inside, which are respectively used to connect the first cooling water channel, the second cooling water channel and the third cooling water channel on both sides of the spark plug boss 110.

[0047] In this invention, after the cylinder head 100 is connected to the water jacket cover 200, the cylinder head water inlet groove 111 and the water jacket cover water inlet groove 210 cooperate and communicate with the water inlet hole 212, and the cylinder head water outlet groove 112 and the water jacket cover water outlet groove 211 cooperate and communicate with the water outlet hole 213. Simultaneously, the cylinder head water inlet groove 111 and the water jacket cover water inlet groove 210 cooperate and communicate with the inlets of the first cooling water channel, the second cooling water channel, and the third cooling water channel; the cylinder head water outlet groove 112 and the water jacket cover water outlet groove 211 cooperate and communicate with the outlets of the first cooling water channel, the second cooling water channel, and the third cooling water channel.

[0048] In this invention, the cylinder head 100 and the water jacket cover 200 are concentrically fitted through the cylinder head shaft hole 101 and the water jacket cover shaft hole 201. After the cylinder head first contact surface 105, cylinder head second contact surface 106, cylinder head third contact surface 107, and cylinder head fourth contact surface 108 are surface-fitted with the corresponding water jacket cover first contact surface 205, water jacket cover second contact surface 206, water jacket cover third contact surface 207, and water jacket cover fourth contact surface 208, they are then fixed by connecting screws 300.

[0049] Specifically, the first mating surface 105 and the third mating surface 107 of the cylinder head are provided with a plurality of equidistant through threaded holes 114, and the center line of all the through threaded holes 114 forms a circle; the first mating surface 205 and the fourth mating surface 208 of the water jacket are provided with a plurality of equidistant through threaded holes 214, and the center line of all the through threaded holes 214 forms a circle; the connecting screw 300 passes through the corresponding through threaded holes 114 and through threaded holes 214 in sequence to connect the cylinder head 100 and the water jacket 200.

[0050] In a further specific embodiment, a sealing ring groove 115 is provided on the first mating surface 105 and the fourth mating surface 108 of the cylinder head, and a sealing ring groove 215 corresponding to the sealing ring groove 115 is provided on the first mating surface 205 and the fourth mating surface 208 of the water jacket cover. After the cylinder head 100 and the water jacket cover 200 are mated, the corresponding sealing rings are installed in the sealing ring groove 115 and the sealing ring groove 215 to ensure the sealing of the inner and outer rings of the cylinder and prevent coolant leakage through the mating surface.

[0051] In a further specific embodiment, the surface of the cylinder head partition boss 109 is provided with a sealing ring groove 3 117, and the surface of the water jacket cover partition groove 209 is provided with a sealing ring groove 4 216 that matches the sealing ring groove 3 117. After the cylinder head 100 and the water jacket cover 200 are mated, corresponding sealing rings are installed in the sealing ring groove 3 117 and the sealing ring groove 4 216 to prevent coolant leakage on the inlet and outlet sides through the mating surfaces.

[0052] In a further specific embodiment, the spark plug boss 110 has sealing ring grooves 118 on both sides of its surface for installing sealing rings to prevent coolant leakage caused by the mating of the spark plug boss 110 with the water jacket cap 200.

[0053] The working principle of this invention is as follows:

[0054] This invention connects the cylinder head 100 and water jacket cover 200 of a rotary opposed piston engine with screws. First, second, and third cooling water channels are respectively formed on the outer side of the cylinder head and the inner side of the water jacket cover. These channels, formed by the cylinder head 100 and water jacket cover 200, create cooling water passages. The water jacket cover 200 has an inlet hole 212 and an outlet hole 213. After entering the inlet hole 212, the coolant flows through the inlet channel to the three different cooling water passages and then converges at the outlet hole 213 through the outlet channel, completing the flow of coolant within the cylinder block and thus cooling the engine block. Furthermore, in this invention, the cylinder head 100 and water jacket cover 200 are designed as a detachable structure connected by screws, eliminating the need for the traditional one-piece casting process for the cylinder block and reducing production costs.

[0055] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0056] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A removable cooling system for a rotary opposed piston engine, characterized by, Comprise: The cylinder head, the cylinder head is opened along the axial central position and has cylinder head axle hole; The outer side of the cylinder head is opened along the outer circle of the cylinder head and has cylinder head first cooling water groove, cylinder head second cooling water groove, cylinder head third cooling water groove in turn to the direction of cylinder head axle hole; The outer circle of the cylinder head first cooling water groove sets up cylinder head first lamination surface, the cylinder head first cooling water groove and the cylinder head second cooling water groove set up cylinder head second lamination surface, the cylinder head second cooling water groove and the cylinder head third cooling water groove set up cylinder head third lamination surface, the inner circle of the cylinder head third cooling water groove sets up cylinder head fourth lamination surface; The outer side of the cylinder head is also provided with cylinder head partition boss and spark plug boss which intersect with three cylinder head cooling water grooves; The cylinder head second lamination surface and the cylinder head third lamination surface of one side of the cylinder head partition boss are equipped with cylinder head water inlet groove, and the cylinder head second lamination surface and the cylinder head third lamination surface of the other side are equipped with cylinder head water outlet groove; The spark plug boss is provided with spark plug mounting hole; The water jacket cover is opened along the axial central position and has water jacket cover axle hole; The inner side of the water jacket cover is opened along the outer circle of the water jacket cover and has water jacket cover first cooling water groove, water jacket cover second cooling water groove, water jacket cover third cooling water groove in turn to the direction of water jacket cover axle hole; The outer circle of the water jacket cover first cooling water groove sets up water jacket cover first lamination surface, the water jacket cover first cooling water groove and the water jacket cover second cooling water groove set up water jacket cover second lamination surface, the water jacket cover second cooling water groove and the water jacket cover third cooling water groove set up water jacket cover third lamination surface, the inner circle of the water jacket cover third cooling water groove sets up water jacket cover fourth lamination surface; The inner side of the water jacket cover is provided with water jacket cover partition groove which intersects with three water jacket cover cooling water grooves and corresponds to the position of the cylinder head partition boss, and the water jacket cover partition groove is provided with water jacket cover water inlet groove and water jacket cover water outlet groove which correspond to the cylinder head water inlet groove and the cylinder head water outlet groove respectively, and the water jacket cover first lamination surface is provided with water inlet hole and water outlet hole which are connected with the water jacket cover water inlet groove and the water jacket cover water outlet groove and the outside; The inner side of the water jacket cover is also provided with notch which corresponds to the spark plug boss; The cylinder head and the water jacket cover are connected through the concentric cooperation of the cylinder head axle hole and the water jacket cover axle hole and the surface cooperation of corresponding lamination surfaces through connecting piece after the cooperation; The cylinder head first cooling water groove and the water jacket cover first cooling water groove cooperate to form first cooling water channel, the cylinder head second cooling water groove and the water jacket cover second cooling water groove cooperate to form second cooling water channel, and the cylinder head third cooling water groove and the water jacket cover third cooling water groove cooperate to form third cooling water channel; Four lamination surfaces on the cylinder head and four lamination surfaces on the water jacket cover partition the first cooling water channel, the second cooling water channel and the third cooling water channel; The spark plug boss is internally provided with a plurality of water channel through holes corresponding to the first cooling water channel, the second cooling water channel and the third cooling water channel respectively. The cylinder head water inlet groove and the water jacket cover water inlet groove are matched and communicated with the inlets of the first cooling water channel, the second cooling water channel and the third cooling water channel; the cylinder head water outlet groove and the water jacket cover water outlet groove are matched and communicated with the outlets of the first cooling water channel, the second cooling water channel and the third cooling water channel.

2. A rotary opposed piston engine removable cooling system according to claim 1, characterised in that, The first and third abutting surfaces of the cylinder head are provided with a plurality of equidistantly arranged through threaded holes one, and the center lines of all the through threaded holes one form a circle; the first and fourth abutting surfaces of the water jacket cover are provided with a plurality of equidistantly arranged through threaded holes two, and the center lines of all the through threaded holes two form a circle; connecting screws pass through the corresponding through threaded holes one and through threaded holes two in sequence to connect the cylinder head and the water jacket cover.

3. A rotary opposed piston engine demountable cooling system according to claim 1 or 2, characterised in that, The first and fourth abutting surfaces of the cylinder head are provided with a sealing ring groove one, and the first and fourth abutting surfaces of the water jacket cover are provided with a sealing ring groove two corresponding to the sealing ring groove one.

4. A removable cooling system for a rotary opposed piston engine according to claim 1 or 2, characterized in that The surface of the cylinder head partition boss is provided with a sealing ring groove three, and the surface of the water jacket cover partition groove is provided with a sealing ring groove four matched with the sealing ring groove three.

5. A removable cooling system for a rotary opposed piston engine according to claim 1 or 2, characterized in that The surface of the spark plug boss is provided with a sealing ring groove five on both sides.

6. A removable cooling system for a rotary opposed piston engine according to claim 1 or 2, characterized in that The two ends of the cylinder head partition boss are connected with the first and fourth abutting surfaces of the cylinder head respectively, and the two ends of the spark plug boss are flush with the outer circumferential surface of the cylinder head and the inner circumferential surface of the cylinder head shaft hole.

Images