Engine and motorcycle

Abstract

The invention relates to an engine and a motorcycle, and relates to the technical field of motorcycles. The invention provides an engine which comprises a crankcase and an oil-gas separation structure. An oil-gas separation structure is arranged on the crankcase, and an oil-gas separation cavity, an air inlet, an air outlet and an oil return opening are formed in the oil-gas separation structure, a plurality of partition plates are arranged in the oil-gas separation cavity and divide the oil-gas separation cavity into a plurality of communicated labyrinth cavities so as to separate mixed oil gas. Through a multi-stage oil-gas separation structure provided with a plurality of labyrinth cavities and partition plates, the oil-gas separation efficiency and degree of blow-by gas are effectively improved; the content of blow-by gas in the engine oil is greatly reduced, and the service life of the engine oil is prolonged; blow-by gas mixed into a lubricating system is reduced, abrasion and corrosion of parts of an engine are reduced, and environment-friendly emission is achieved; and the gas pressure in the crankcase is balanced, and the reliability and the stability of engine operation are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of motorcycles, and in particular to an engine and a motorcycle. Background Art

[0002] When the engine is working, a small amount of the high-pressure combustible mixture and burned gas in the combustion chamber will enter the crankcase through the gap between the piston group and the cylinder block, causing blowby.

[0003] Among them, the components of blowby gas are unburned fuel gas, water vapor and exhaust gas, which will dilute the engine oil, reduce the performance of the engine oil, and accelerate the oxidation and deterioration of the engine oil.

[0004] The inventors have discovered that water vapor condenses in the engine oil to form sludge, which can seriously block the oil circuit; acidic gases in the exhaust gas mix into the lubrication system, causing corrosion and accelerated wear of engine parts; blowby gas can also cause the crankcase pressure to be too high and destroy the crankcase seal, causing the engine oil to leak and lose. Summary of the invention

[0005] The present invention aims to provide an engine and a motorcycle, which can improve the efficiency and degree of oil-gas separation of blow-by gas.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In the first aspect, the present invention proposes an engine, comprising a crankcase and an oil-gas separation structure; the oil-gas separation structure is arranged on the crankcase, and an oil-gas separation chamber and an air inlet, an air outlet and an oil return port connected to the oil-gas separation chamber are provided in the oil-gas separation structure, the oil-gas separation chamber is connected to the crankcase through the air inlet, the air outlet is connected to the external environment, and the oil return port is connected to the interior of the crankcase; a plurality of partitions are provided in the oil-gas separation chamber, and the plurality of partitions separate the oil-gas separation chamber into a plurality of connected maze chambers to separate the mixed oil and gas.

[0008] Optionally, the oil-gas separation structure comprises at least two shells which are sequentially connected and communicated, a separation chamber is formed in each of the at least two shells, and the at least two shells are provided with an air inlet, an air outlet and an oil return port;

[0009] The plurality of partitions are disposed in at least two of the separation chambers and are connected to form the oil-gas separation chamber.

[0010] Optionally, the oil-gas separation structure comprises a first shell, a second shell and a third shell connected in sequence;

[0011] A first separation chamber is formed inside the first shell, and the first shell is provided with the air inlet and the first outlet communicated with the first separation chamber;

[0012] A second separation chamber is formed inside the second shell, and the second shell is provided with the gas outlet and the second inlet communicated with the second separation chamber;

[0013] A third separation chamber is formed inside the third shell, and the third shell is provided with a first inlet and a second outlet communicating with the third separation chamber, the second outlet is arranged away from the first inlet, the first inlet is communicated with the first outlet, and the second inlet is communicated with the second outlet;

[0014] The first shell and / or the second shell and / or the third shell are provided with the oil return port, and the first separation chamber, the second separation chamber and the third separation chamber are all provided with the plurality of partitions and are connected to form the oil-gas separation chamber.

[0015] Optionally, the crankcase comprises a right cover, a first gasket, a right case body, a second gasket and a left case body which are sealed and connected in sequence;

[0016] The first shell is connected to the right cover and the connection surface is the first connection surface; the second shell is connected to the right box body and the connection surface is the second connection surface; the third shell is connected to the left box body and the connection surface is the third connection surface;

[0017] The first shell is integrally formed with the right cover, the second shell is integrally formed with the right box body, and the third shell is integrally formed with the left box body.

[0018] Optionally, the first shell is located obliquely above the right cover;

[0019] The first separation chamber is provided with a first partition, a second partition, a third partition, a fourth partition and a fifth partition, so that the first separation chamber forms a first labyrinth chamber, a second labyrinth chamber, a third labyrinth chamber, a fourth labyrinth chamber and a fifth labyrinth chamber which are connected in sequence, and the fifth labyrinth chamber is located at the top of the first separation chamber;

[0020] The first sealing gasket is sealed and connected to the open end of the first shell, and the first sealing gasket is provided with a first air inlet, a second air inlet, the first outlet and a first oil return hole, the first outlet is arranged relative to the fifth labyrinth chamber, and the first oil return hole is arranged at the bottom of the first separation chamber;

[0021] The first connecting surface is provided with a first oil return port, and the first oil return port is located at the bottom of the first separation chamber.

[0022] Optionally, an annular mounting portion is transversely provided in the first shell, the first partition plate connects the upper inner wall of the first shell and the upper outer wall of the annular mounting portion, the second partition plate connects the right inner wall of the first shell, the third partition plate connects the lower outer wall of the annular mounting portion, the fourth partition plate connects the first connecting surface, and the fifth partition plate is located above the fourth partition plate and connected to the first connecting surface;

[0023] The first air inlet is arranged relative to the first labyrinth chamber, the second air inlet is arranged relative to the second labyrinth chamber, and the first oil return port is located at the bottom of the third labyrinth chamber.

[0024] Optionally, the third shell is located above the left box body, and a sixth partition, a seventh partition and an eighth partition are arranged in the third separation chamber, so that the third separation chamber forms a sixth labyrinth chamber, a seventh labyrinth chamber, an eighth labyrinth chamber and a ninth labyrinth chamber, and the sixth labyrinth chamber, the seventh labyrinth chamber, the eighth labyrinth chamber and the ninth labyrinth chamber are arranged horizontally and connected in sequence;

[0025] One side of the second sealing gasket is sealed and connected to the open end of the third shell. The first inlet and the connecting port are arranged on the second sealing gasket. The first inlet is arranged relative to the sixth labyrinth chamber. One side of the connecting port is the second inlet, and the other side is the second outlet. The connecting port is arranged relative to the ninth labyrinth chamber.

[0026] Optionally, the second shell is arranged relative to the third shell and is located above the right box body, and a ninth partition, a tenth partition and an eleventh partition are arranged in the third separation chamber, so that the third separation chamber forms a tenth labyrinth chamber, an eleventh labyrinth chamber and a twelfth labyrinth chamber, and the tenth labyrinth chamber, the eleventh labyrinth chamber and the twelfth labyrinth chamber are arranged horizontally and are connected in sequence;

[0027] The air outlet is arranged at the top of the third shell;

[0028] The other side of the second sealing gasket is sealed and connected to the opening end of the second shell, and the tenth labyrinth cavity is arranged opposite to the connecting port.

[0029] Optionally, a second oil return port is provided at the bottom of the third housing, the second oil return port is located at the bottom of the third separation chamber, and the second oil return port is connected to the interior of the crankcase;

[0030] The second sealing gasket is provided with a second oil return hole, the second oil return hole communicates with the third separation chamber and the second separation chamber, and the second oil return port is located below the second oil return hole.

[0031] In a second aspect, the present invention provides a motorcycle, comprising: an engine as described in any one of the above items.

[0032] The beneficial effects of the engine and motorcycle provided by the embodiments of the present invention include:

[0033] The engine and motorcycle are provided with a multi-stage oil-gas separation structure with multiple labyrinth chambers and partitions, which effectively improves the efficiency and degree of oil-gas separation of blowby gas; it not only greatly reduces the blowby gas content in the engine oil and extends the service life of the engine oil; it also reduces the blowby gas mixed into the lubrication system, reduces the wear and corrosion of engine parts, and is environmentally friendly; it also balances the gas pressure in the crankcase to ensure the reliability and stability of engine operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 An exploded view of the engine provided for this embodiment;

[0036] Figure 2 A schematic diagram of the structure of the right cover, the first sealing gasket and the right box body provided in this embodiment;

[0037] Figure 3 for Figure 2 A partial schematic diagram of the first shell of FIG.

[0038] Figure 4 A schematic diagram of the structure of the right box body, the second sealing gasket and the left box body provided in this embodiment;

[0039] Figure 5 for Figure 4 A partial schematic diagram of the third housing of B without the second sealing gasket;

[0040] Figure 6 for Figure 4 A partial schematic diagram of the second shell of C in the middle;

[0041] Figure 7 A schematic diagram of the structure of the right cover and the first shell provided in this embodiment;

[0042] Figure 8 A schematic diagram of a structure in which a first sealing gasket is provided on the right cover provided in this embodiment;

[0043] Fig. 9 A schematic diagram of the structure of the right box body and the second shell provided in this embodiment;

[0044] Fig.10 A schematic diagram of the structure in which a second sealing gasket is arranged on the right box body provided in this embodiment;

[0045] Fig.11 A schematic diagram of the structure in which a second sealing gasket is arranged on the left box body provided in this embodiment;

[0046] Fig.12 A schematic structural diagram of the left box body and the third shell body provided in this embodiment.

[0047] Icons: 010-engine; 100-crankcase; 110-right cover; 111-first connection surface; 120-first sealing gasket; 121-first air inlet; 122-second air inlet; 123-first outlet; 124-first oil return hole; 130-right case; 131-second connection surface; 132-matching air inlet; 133-matching outlet; 140-second sealing gasket; 141-first inlet; 142-connecting port; 143-second oil return hole; 150-left case; 151-third connection surface; 160-first installation cavity; 170-second installation cavity; 180-interface;

[0048] 200-oil-gas separation structure; 210-first shell; 211-first separation chamber; 2111-first labyrinth chamber; 2112-second labyrinth chamber; 2113-third labyrinth chamber; 2114-fourth labyrinth chamber; 2115-fifth labyrinth chamber; 212-first partition; 213-second partition; 214-third partition; 215-fourth partition; 216-fifth partition; 217-annular mounting portion; 218-first oil return port; 230-second shell; 231-second separation chamber; 2 311-the tenth labyrinth chamber; 2312-the eleventh labyrinth chamber; 2313-the twelfth labyrinth chamber; 232-the ninth partition; 233-the tenth partition; 234-the eleventh partition; 235-the air outlet; 220-the third shell; 221-the third separation chamber; 2211-the sixth labyrinth chamber; 2212-the seventh labyrinth chamber; 2213-the eighth labyrinth chamber; 2214-the ninth labyrinth chamber; 222-the sixth partition; 223-the seventh partition; 224-the eighth partition; 225-the second oil return port. DETAILED DESCRIPTION

[0049] When the engine 010 is working, a small amount of the high-pressure combustible mixture and burned gas in the combustion chamber will enter the crankcase 100 through the gap between the piston group and the cylinder block, causing blowby.

[0050] Among them, the components of blowby gas are unburned fuel gas, water vapor and exhaust gas, which will dilute the engine oil, reduce the performance of the engine oil, and accelerate the oxidation and deterioration of the engine oil.

[0051] The inventors have found that water vapor condenses in the engine oil to form sludge, which can seriously block the oil circuit; acidic gases in the exhaust gas mix into the lubrication system, causing corrosion and accelerated wear of engine 010 parts; blowby gas can also cause the crankcase 100 pressure to be too high and destroy the seal of the crankcase 100, causing the engine oil to leak and lose.

[0052] In view of the above problems, the present invention provides an engine 010 and a motorcycle, which can improve the efficiency and degree of oil-gas separation of blowby gas, thereby improving the above problems.

[0053] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0054] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0056] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0058] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0059] The overall structure, working principle and technical effects of the engine 010 provided by the present invention are described in detail below through embodiments and in conjunction with the accompanying drawings.

[0060] This embodiment proposes a motorcycle, including an engine 010 and a combustion chamber; a crankshaft structure is provided in a crankcase 100; the combustion chamber is located above the crankcase 100, a piston structure is provided in the combustion chamber for reciprocating motion, and the piston structure is transmission-connected to the crankshaft structure via a connecting rod structure.

[0061] Among them, the motorcycle proposed in this embodiment can be a two-wheeled motorcycle or a three-wheeled motorcycle. By setting the engine 010 of this embodiment, the failure rate of the engine 010 is reduced, the reliability is enhanced, the motorcycle can run reliably and stably, and the maintenance period of the whole vehicle is extended.

[0062] Please refer to Figure 1 An engine 010 proposed in this embodiment includes a crankcase 100 and an oil-gas separation structure 200; the oil-gas separation structure 200 is arranged on the crankcase 100, and an oil-gas separation chamber and an air inlet, an air outlet 235 and an oil return port connected to the oil-gas separation chamber are arranged in the oil-gas separation structure 200, the oil-gas separation chamber is connected to the crankcase 100 through the air inlet, the air outlet 235 is connected to the external environment, and the oil return port is connected to the interior of the crankcase 100; a plurality of partitions are arranged in the oil-gas separation chamber, and the plurality of partitions separate the oil-gas separation chamber into a plurality of connected labyrinth chambers to separate the mixed oil and gas.

[0063] It can be understood that the blow-by gas containing unburned fuel gas, water vapor and exhaust gas in the crankcase 100 enters the oil-gas separation chamber from the air inlet, and the oil-gas separation chamber of the oil-gas separation structure 200 is separated into a plurality of interconnected maze chambers by a plurality of partitions, so the blow-by gas circulates in the plurality of maze chambers in turn and the flow process is hindered by the partitions, so that the blow-by gas is separated into gas and oil in the maze chamber, and finally the gas is discharged from the air outlet 235, and the oil flows back to the crankcase 100 from the oil return port.

[0064] By providing a multi-stage oil-gas separation structure 200 with multiple labyrinth chambers and partitions, the efficiency and degree of oil-gas separation of blowby gas are effectively improved; not only the blowby gas content in the engine oil is greatly reduced, and the service life of the engine oil is extended; but also the blowby gas mixed into the lubrication system is reduced, the wear and corrosion of the parts of the engine 010 are reduced, and the emissions are environmentally friendly; it also balances the gas pressure in the crankcase 100, ensuring the reliability and stability of the operation of the engine 010.

[0065] In the present embodiment, the engine 010 includes a crankcase 100 .

[0066] The crankcase 100 is used to install the crankshaft structure and output the power of the engine 010 through the crankshaft structure.

[0067] In this embodiment, please refer to Figure 1The crankcase 100 includes a right cover 110, a first gasket 120, a right case 130, a second gasket 140 and a left case 150 which are sealed and connected in sequence. The open end of the left case 150 and the open end of the right case 130 cooperate to form a first installation cavity 160. The left case 150 and the right case 130 are sealed by the second gasket 140 and fixed by a connector. The first installation cavity 160 is used to install a power structure such as a speed change structure. The left case 150 and the right case 130 cooperate and form an interface 180 on the top so that the crankshaft structure is connected to the internal power structure through the interface 180. At the same time, the blowby gas also flows into the crankcase 100 from the interface 180.

[0068] Among them, the other end of the right box body 130 and the open end of the right cover 110 cooperate to form a second installation cavity 170, and the right box body 130 and the right cover 110 are sealed by the first sealing gasket 120 and fixed by the connecting piece; the second installation cavity 170 is used to install a power structure such as a clutch, and a plurality of axial holes are provided on the right box body 130 so that the output shaft of the power structure in the first installation cavity 160 passes through the axial hole and is transmittedly connected to the clutch and other structures.

[0069] An oil pan is disposed at the bottom of the crankcase 100 , and the oil pan is communicated with the first installation cavity 160 and the second installation cavity 170 , respectively.

[0070] In this embodiment, the engine 010 includes an oil-gas separation structure 200 .

[0071] The oil-gas separation structure 200 is used to separate the blow-by gas and discharge the blow-by gas out of the crankcase 100 .

[0072] In this embodiment, the oil-gas separation structure 200 includes at least two shells that are connected and communicated in sequence, and a separation chamber is formed in at least two shells. At least two shells are provided with an air inlet, an air outlet 235 and an oil return port; at least two separation chambers are provided with multiple partitions and are connected to form an oil-gas separation chamber.

[0073] It can be understood that at least two separation chambers can perform multi-stage separation on the blow-by gas in sequence, completely separate the blow-by gas, and finally the gas discharged from the engine 010 is a small amount of oil-gas mixture.

[0074] It is worth mentioning that at least two shells can be matched with various forms of crankcase 100 structures. For example, the crankcase 100 structure including the left case 150 and the right case 130 can be matched with two shells, the crankcase 100 structure including the left case 150, the right case 130 and the right cover 110 can be matched with three shells, and the crankcase 100 structure including the left cover, the left case 150, the right case 130 and the right cover 110 can be matched with four shells.

[0075] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 4 In order to cooperate with the crankcase 100 including the right cover 110, the first gasket 120, the right case 130, the second gasket 140 and the left case 150, the oil-gas separation structure 200 includes a first shell 210, a second shell 230 and a third shell 220 connected in sequence.

[0076] Among them, see Figure 2 and Figure 3 The first shell 210 is connected to the right cover 110 and the connecting surface is the first connecting surface 111 ; a first separation chamber 211 is formed inside the first shell 210 , and the first shell 210 is provided with an air inlet and a first outlet 123 which are connected to the first separation chamber 211 .

[0077] Among them, see 4 and Figure 6 The second shell 230 is connected to the right box body 130 and the connecting surface is the second connecting surface 131 ; a second separation chamber 231 is formed inside the second shell 230 , and the second shell 230 is provided with an outlet 235 and a second inlet communicating with the second separation chamber 231 .

[0078] Among them, see Figure 4 and Figure 5 The third shell 220 is connected to the left box body 150 and the connection surface is the third connection surface 151; a third separation chamber 221 is formed inside the third shell 220, and the third shell 220 is provided with a first inlet 141 and a second outlet communicating with the third separation chamber 221, and the second outlet is arranged away from the first inlet 141; please refer to Figure 2 and Figure 4 The first inlet 141 is connected to the first outlet 123, and the second inlet is connected to the second outlet.

[0079] The first shell 210 and / or the second shell 230 and / or the third shell 220 are provided with an oil return port, and the first separation chamber 211, the second separation chamber 231 and the third separation chamber 221 are each provided with a plurality of partitions and connected to form an oil-gas separation chamber.

[0080] In this embodiment, the internal space of the engine 010 is limited, so the oil-gas separation structure 200 is designed to match the internal space of the crankcase 100, and the crankcase 100 and the oil-gas separation structure 200 are designed as an integrated unit, so that the design of the crankcase 100 and the oil-gas separation structure 200 is reasonable and the layout of the whole machine is balanced.

[0081] For details, please refer to Figure 1 , Figure 2 and Figure 4The first shell 210 and the right cover 110 are an integrally formed structure formed by mold casting, the second shell 230 and the right box body 130 are an integrally formed structure formed by mold casting; the third shell 220 and the left box body 150 are an integrally formed structure formed by mold casting; wherein, the two sides of the first sealing gasket 120 respectively seal and connect the opening ends of the first shell 210 and the right cover 110 and the right box body 130 to form a corresponding cavity structure; wherein, the two sides of the second sealing gasket 140 respectively seal and connect the opening ends of the second shell 230 and the right box body 130 and the opening ends of the third shell 220 and the left box body 150 to form a corresponding cavity structure.

[0082] It is worth mentioning that, since the connection mode of the separation chambers of the oil-gas separation structure 200 in this embodiment is: the first separation chamber 211, the third separation chamber 221 and the second separation chamber 231 are connected in sequence, it can be understood that the oil and gas are separated in the first shell 210 of the right cover 110, the third shell 220 of the left box body 150 and the second shell 230 of the right box body 130 in sequence and discharged after separation.

[0083] Therefore, for ease of understanding, the specific layout of the first shell 210, the third shell 220 and the second shell 230 that are connected in sequence will be introduced in sequence below.

[0084] In this embodiment, the oil-gas separation structure 200 includes a first shell 210 .

[0085] In this embodiment, please refer to Figure 2 and Figure 3 The first shell 210 is located obliquely above the right cover 110, and the first connecting surface 111 obliquely above the first shell 210 and the right cover 110 forms a first separation chamber 211, and the first separation chamber 211 is sealed by the first sealing gasket 120, so that the blow-by gas can flow in the labyrinth chamber in sequence for separation.

[0086] The oil-gas separation structure 200 can be designed to cooperate with the power structure in the crankcase 100 . Accordingly, an annular mounting portion 217 for mounting the starter shaft is integrated and arranged in the first housing 210 . The annular mounting portion 217 is arranged to penetrate the first housing 210 transversely.

[0087] For further information, please refer to Figure 3 and Figure 7Five partitions are provided in the first separation chamber 211, namely the first partition 212, the second partition 213, the third partition 214, the fourth partition 215 and the fifth partition 216; the first separation chamber 211 is provided with the first partition 212, the second partition 213, the third partition 214, the fourth partition 215 and the fifth partition 216, so that the first separation chamber 211 forms a first labyrinth chamber 2111, a second labyrinth chamber 2112, a third labyrinth chamber 2113, a fourth labyrinth chamber 2114 and a fifth labyrinth chamber 2115 which are connected in sequence, the first labyrinth chamber 2111, the second labyrinth chamber 2112, the third labyrinth chamber 2113 and the fourth labyrinth chamber 2114 are arranged around the annular mounting portion 217, and the fifth labyrinth chamber 2115 is located at the top of the first separation chamber 211.

[0088] Please refer to Figure 3 and Figure 7 The first partition plate 212 connects the upper inner wall of the first shell 210 and the upper outer wall of the annular mounting portion 217 ; at the same time, the first partition plate 212 , the second partition plate 213 , the annular mounting portion 217 and the inner wall of the first shell 210 form a first labyrinth cavity 2111 .

[0089] Please refer to Figure 3 and Figure 7 The second partition 213 is connected to the right inner wall of the first shell 210, and a first gap is provided between the bottom of the second partition 213 and the outer wall of the annular mounting portion 217; at the same time, the second partition 213, the third partition 214, the annular mounting portion 217 and the inner wall of the first shell 210 form a second labyrinth cavity 2112, and the first labyrinth cavity 2111 is connected to the second labyrinth cavity 2112 through the first gap.

[0090] Please refer to Figure 3 and Figure 7 The third partition plate 214 is connected to the lower outer wall of the annular mounting portion 217, and a second gap is provided between the bottom of the third partition plate 214 and the inner wall of the first shell 210; at the same time, the third partition plate 214, the fourth partition plate 215, the annular mounting portion 217 and the inner wall of the first shell 210 form a third labyrinth cavity 2113, and the second labyrinth cavity 2112 is connected to the third labyrinth cavity 2113 through the second gap.

[0091] Please refer to Figure 3 and Figure 7 The fourth partition plate 215 is connected to the first connecting surface 111, and a third gap is provided between the bottom of the fourth partition plate 215 and the outer wall of the annular mounting portion 217; at the same time, the fourth partition plate 215, the fifth partition plate 216, the annular mounting portion 217 and the first partition plate 212 form a fourth labyrinth cavity 2114, and the third labyrinth cavity 2113 is connected to the fourth labyrinth cavity 2114 through the third gap.

[0092] Please refer to Figure 3 and Figure 7 The fifth partition 216 is located above the fourth partition 215 and connected to the first connecting surface 111, and a fourth gap is provided between the bottom of the fifth partition 216 and the inner wall of the first shell 210; at the same time, the fifth partition 216, the first connecting surface 111 and the first partition 212 form a fifth labyrinth cavity 2115, and the fourth labyrinth cavity 2114 is connected to the fifth labyrinth cavity 2115 through the fourth gap.

[0093] The first connecting surface 111 is provided with a first oil return port 218 , and the first oil return port 218 is located at the bottom of the first separation chamber 211 , that is, the first oil return port 218 is located at the bottom of the third labyrinth chamber 2113 .

[0094] In this embodiment, the oil-gas separation structure 200 includes a first sealing gasket 120 .

[0095] Please refer to Figure 2 and Figure 8 Since both sides of the first sealing gasket 120 seal the opening ends of the right box body 130 and the second shell 230 and the opening ends of the right cover 110 and the first shell 210 together, the second shell 230 and one side of the first sealing gasket 120 form the above-mentioned sealed cavity.

[0096] Therefore, a first air inlet 121, a second air inlet 122, a first outlet 123 and a first oil return hole 124 are arranged on the first sealing gasket 120; the first outlet 123 is arranged relative to the fifth labyrinth chamber 2115; the first oil return hole 124 is arranged at the bottom of the first separation chamber 211 and is connected to the first separation chamber 211; the first air inlet 121 is arranged relative to the first labyrinth chamber 2111; the second air inlet 122 is arranged relative to the second labyrinth chamber 2112.

[0097] It is worth mentioning that please refer to Figure 2 Since the blow-by gas flows into the first installation cavity 160 formed by the right box body 130 and the left box body 150, the blow-by gas needs to pass through the matching air inlet 132 of the right box body 130 and the first air inlet 121 and the second air inlet 122 of the first sealing gasket 120 before the blow-by gas can enter the first separation cavity 211; wherein, the right box body 130 is provided with two matching air inlets 132 corresponding to the first air inlet 121 and the second air inlet 122 respectively.

[0098] At the same time, since the blow-by gas is separated in the first separation chamber 211 and then directly passes into the third separation chamber 221 for re-separation, the right case 130 is provided with a matching outlet 133 corresponding to the first outlet 123, so that the blow-by gas can enter the sixth labyrinth chamber 2211 of the third separation chamber 221 from the first separation chamber 211 through the first inlet 141. At the same time, since the right case 130 is provided with a matching air inlet 132 and a matching outlet 133, so that oil will accumulate in the cavity formed between the right case 130 and the first sealing gasket 120, the first oil return hole 124 is provided to discharge the accumulated oil into the first separation chamber 211, and return it to the crankcase 100 through the first oil return port 218.

[0099] It can be understood that the process of the first separation of the blow-by gas in the first shell 210 is as follows: the blow-by gas enters the first separation chamber 211 from the first air inlet 121 and the second air inlet 122, and circulates in a circular manner through the first labyrinth chamber 2111, the second labyrinth chamber 2112, the third labyrinth chamber 2113, the fourth labyrinth chamber 2114 and the fifth labyrinth chamber 2115 in turn, and is discharged from the first outlet 123 on the first sealing gasket 120 corresponding to the fifth labyrinth chamber 2115, and then enters the third separation chamber 221. The blow-by gas flows upward in the first separation chamber 211, and hits the first baffle 212, the second baffle 213, the third baffle 214, the fourth baffle 215 and the fifth baffle 216 in sequence, and the blow-by gas is separated into oil and gas during this collision process; the gas enters the third separation chamber 221 from the first outlet 123; the oil in the first separation chamber 211 drips downward along the multiple baffles, and flows back to the second installation chamber 170 from the first oil return port 218, and flows from the second installation chamber 170 to the oil pan arranged at the bottom.

[0100] The oil accumulated between the first sealing gasket 120 and the right case 130 flows into the first separation chamber 211 through the first oil return hole 124 , and flows back into the crankcase 100 from the first oil return port 218 .

[0101] In this embodiment, the oil-gas separation structure 200 includes a third shell 220 .

[0102] In this embodiment, please refer to Figure 4 , Figure 5 and Fig.12 The third shell 220 is located above the left box body 150 and in the inner cavity of the left box body 150. The third shell 220 and the third connecting surface 151 above the left box body 150 form a third separation chamber 221, and the third separation chamber 221 is sealed by one side of the second sealing gasket 140, so that the blowby gas can flow in the multiple labyrinth chambers of the third separation chamber 221 in sequence for separation.

[0103] For further information, please refer to Figure 5 and Fig.12 A sixth partition plate 222, a seventh partition plate 223 and an eighth partition plate 224 are arranged in the third separation chamber 221, so that the third separation chamber 221 forms a sixth labyrinth chamber 2211, a seventh labyrinth chamber 2212, an eighth labyrinth chamber 2213 and a ninth labyrinth chamber 2214, and the sixth labyrinth chamber 2211, the seventh labyrinth chamber 2212, the eighth labyrinth chamber 2213 and the ninth labyrinth chamber 2214 are arranged horizontally and connected in sequence.

[0104] Among them, the sixth partition 222 connects the inner wall of the third shell 220 and the bottom wall of the first connecting surface 111, and a gap of a certain distance is left between the lateral end of the sixth partition 222 and the closing surface; at the same time, the sixth partition 222, the third shell 220 and the first connecting surface 111 form a sixth labyrinth cavity 2211.

[0105] Among them, the seventh partition 223 is connected to the inner wall of the first connecting surface 111, and a fifth gap is provided between the bottom of the seventh partition 223 and the inner wall of the third shell 220; at the same time, the sixth partition 222 and the seventh partition 223 form the seventh labyrinth cavity 2212 with the third shell 220 and the first connecting surface 111, and the sixth labyrinth cavity 2211 and the seventh labyrinth cavity 2212 are connected through a gap.

[0106] Among them, the eighth partition 224 is connected to the inner wall of the third shell 220, and a sixth gap is provided between one end of the eighth partition 224 and the inner wall of the third shell 220, and a gap of a certain distance is left between the lateral end of the eighth partition 224 and the closing surface so that the separated oil can flow through; at the same time, the seventh partition 223 and the eighth partition 224 form the eighth labyrinth chamber 2213 with the third shell 220 and the first connecting surface 111, and the seventh labyrinth chamber 2212 is connected with the eighth labyrinth chamber 2213 through the fifth gap; at the same time, the eighth partition 224 forms the ninth labyrinth chamber 2214 with the third shell 220 and the first connecting surface 111, and the eighth labyrinth chamber 2213 is connected with the ninth labyrinth chamber 2214 through the sixth gap.

[0107] A second oil return port 225 is provided at the bottom of the third housing 220 , and the second oil return port 225 is connected to the interior of the crankcase 100 .

[0108] In this embodiment, the oil-gas separation structure 200 includes a second sealing gasket 140 .

[0109] Please refer to Figure 4 , Fig.10 and Fig.11Since the left box body 150 and the second shell 230 and the right box body 130 and the third shell 220 are sealed by the second sealing gasket 140 and form corresponding cavities respectively; accordingly, one side of the second sealing gasket 140 is sealed and connected to the opening end of the third shell 220, and the other side of the second sealing gasket 140 is sealed and connected to the opening end of the second shell 230.

[0110] Specifically, a first inlet 141 and a connection port 142 are disposed on the second sealing gasket 140 ; ​​the first inlet 141 and the connection port 142 are disposed far apart.

[0111] The first inlet 141 is arranged relative to the sixth labyrinth chamber 2211 , and is also arranged relative to the matching outlet 133 and the first outlet 123 , so that the blow-by gas can enter the sixth labyrinth chamber 2211 of the third separation chamber 221 from the fifth labyrinth chamber 2115 of the first separation chamber 211 .

[0112] Among them, because the second sealing gasket 140 seals and connects the second shell 230 and the third shell 220 on both sides respectively, one side of the connecting port 142 is the second inlet, and is connected to the ninth labyrinth chamber 2214 of the third separation chamber 221; the other side of the connecting port 142 is the second outlet, and is connected to the tenth labyrinth chamber 2311 of the second separation chamber 231, which is relatively arranged; thereby realizing the connection between the second separation chamber 231 and the third separation chamber 221.

[0113] It can be understood that the process of the second separation of blow-by gas in the third shell 220 is as follows: the blow-by gas flows out from the fifth labyrinth chamber 2115 of the first separation chamber 211, and enters the sixth labyrinth chamber 2211 of the third separation chamber 221 through the first outlet 123, the matching outlet 133 and the first inlet 141; the blow-by gas flows horizontally through the sixth labyrinth chamber 2211, the seventh labyrinth chamber 2212, the eighth labyrinth chamber 2213 and the ninth labyrinth chamber 2214 in turn, and at the same time, the blow-by gas laterally hits the sixth partition plate 222, the seventh partition plate 223, the eighth partition plate 224 and the ninth partition plate 232 in turn, and the blow-by gas is separated for the second time during this impact process.

[0114] The blowby gas is separated into gas and oil for a second time; wherein, the gas enters the second separation chamber 231 from the connecting port 142; wherein, the oil in the third separation chamber 221 drips downward along multiple partitions, and flows along the inner wall of the second shell 230 to the second oil return port 225, and flows back from the second oil return port 225 to the first installation chamber 160, and flows from the first installation chamber 160 to the oil pan arranged at the bottom.

[0115] In this embodiment, the oil-gas separation structure 200 includes a second shell 230 .

[0116] In this embodiment, please refer to Figure 6 and Fig. 9, the second shell 230 is located above the right box body 130; at the same time, the second shell 230 is arranged relative to the third shell 220 and is located in the inner cavity of the right box body 130, then the second shell 230 and the second connecting surface 131 above the right box body 130 form a second separation chamber 231, and the second separation chamber 231 is sealed by the other side of the second sealing gasket 140, so that the blowby gas can flow in the multiple labyrinth chambers of the second separation chamber 231 in turn for separation.

[0117] The air outlet 235 is disposed on the top of the third housing 220 , ie, on the second connecting surface 131 .

[0118] For further information, please refer to Figure 6 and Fig. 9 A ninth partition plate 232, a tenth partition plate 233 and an eleventh partition plate 234 are arranged in the third separation chamber 221, so that the third separation chamber 221 forms a tenth labyrinth chamber 2311, an eleventh labyrinth chamber 2312 and a twelfth labyrinth chamber 2313. The tenth labyrinth chamber 2311, the eleventh labyrinth chamber 2312 and the twelfth labyrinth chamber 2313 are arranged horizontally and connected in sequence.

[0119] Among them, the ninth partition 232 is connected to the inner wall of the second shell 230, and a seventh notch is provided between one end of the ninth partition 232 and the inner wall of the second shell 230, and a gap of a certain distance is left between the lateral end of the ninth partition 232 and the closing surface so that the separated oil can flow through; at the same time, the ninth partition 232, the second shell 230 and the second connecting surface 131 form a tenth labyrinth cavity 2311.

[0120] Among them, the tenth partition 233 is connected to the inner wall of the second connecting surface 131, and an eighth gap is provided between one end of the tenth partition 233 and the inner wall of the second shell 230; at the same time, the ninth partition 232 and the tenth partition 233 form the eleventh labyrinth cavity 2312 with the second shell 230 and the second connecting surface 131, and the tenth labyrinth cavity 2311 and the eleventh labyrinth cavity 2312 are connected through the seventh gap.

[0121] Among them, the tenth partition 233, the second shell 230 and the second connecting surface 131 form a twelfth labyrinth cavity 2313, and the eleventh labyrinth cavity 2312 and the twelfth labyrinth cavity 2313 are connected through the eighth gap; at the same time, the twelfth labyrinth cavity 2313 is divided into two parts, the upper and lower parts, by the eleventh partition 234, the eleventh partition 234 is horizontally connected to the inner wall of the second shell 230, and a ninth gap is provided between one end of the eleventh partition 234 and the tenth partition 233.

[0122] The air outlet 235 is located at the top of the twelfth labyrinth cavity 2313 .

[0123] In this embodiment, please refer to Fig.10 and Fig.11 Since both sides of the second sealing gasket 140 simultaneously seal the left box body 150 and the right box body 130 and form corresponding cavities respectively, the tenth labyrinth chamber 2311 and the ninth labyrinth chamber 2214 are arranged opposite to each other and communicated through the connecting port 142 on the second sealing gasket 140. Furthermore, the second sealing gasket 140 is also provided with a second oil return hole 143, which communicates with the twelfth labyrinth chamber 2313 of the third separation chamber 221 and the second separation chamber 231.

[0124] The second oil return port 225 is located below the second oil return hole 143 .

[0125] It can be understood that the process of the third separation of the blow-by gas in the second shell 230 is as follows: the blow-by gas flows out from the ninth labyrinth chamber 2214 of the third separation chamber 221, and enters the tenth labyrinth chamber 2311 of the second separation chamber 231 through the connecting port 142; the blow-by gas flows horizontally through the tenth labyrinth chamber 2311, the eleventh labyrinth chamber 2312 and the twelfth labyrinth chamber 2313 in turn, and at the same time, the blow-by gas laterally hits the ninth partition plate 232, the tenth partition plate 233 and the eleventh partition plate 234 in turn, and the blow-by gas is finally separated during this impact process.

[0126] The blowby gas is finally separated into gas and part of the oil; wherein, the gas is discharged from the gas outlet 235; wherein, the oil in the second separation chamber 231 drips downward along multiple partitions, and flows along the inner wall of the second shell 230 to the second oil return hole 143, flows from the second oil return hole 143 into the third separation chamber 221 and flows back from the second oil return port 225 to the first installation chamber 160, and flows from the first installation chamber 160 to the oil pan arranged at the bottom.

[0127] It is worth mentioning that, in other embodiments, the oil-gas separation structure 200 may also be configured in coordination with other crankcase 100 structures.

[0128] The working principle and process of the engine 010 provided in the embodiment of the present invention are specifically as follows:

[0129] The blow-by gas is separated for the first time in the first shell 210: the blow-by gas flows from the combustion chamber into the first installation cavity 160 through the interface 180, and the blow-by gas enters the first separation cavity 211 through the corresponding matching air inlet 132 and the first air inlet 121 and the second air inlet 122, and after circulating in a circular manner from the first labyrinth cavity 2111, the second labyrinth cavity 2112, the third labyrinth cavity 2113, the fourth labyrinth cavity 2114 and the fifth labyrinth cavity 2115 in turn, enters the third separation cavity 221 from the first outlet 123 at the top of the fifth labyrinth cavity 2115.

[0130] The blow-by gas flows upward in the first separation chamber 211, and is separated into oil and gas for the first time in the process of hitting multiple baffle units; the gas enters the third separation chamber 221 from the first outlet 123; the oil in the first separation chamber 211 drips downward along the multiple baffles, and flows back from the first oil return port 218 to the second installation chamber 170, and flows from the second installation chamber 170 to the oil pan arranged at the bottom.

[0131] The oil accumulated between the first sealing gasket 120 and the right case 130 flows into the first separation chamber 211 through the first oil return hole 124 , and flows back into the crankcase 100 from the first oil return port 218 .

[0132] Furthermore, the blow-by gas is separated for the second time in the third shell 220: the blow-by gas flows out from the fifth labyrinth chamber 2115 of the first separation chamber 211, and enters the sixth labyrinth chamber 2211 of the third separation chamber 221 through the first outlet 123, the matching outlet 133 and the first inlet 141; after the blow-by gas flows horizontally through the sixth labyrinth chamber 2211, the seventh labyrinth chamber 2212, the eighth labyrinth chamber 2213 and the ninth labyrinth chamber 2214 in turn, the gas enters the second separation chamber 231 from the connecting port 142.

[0133] The blow-by gas hits the sixth baffle 222, the seventh baffle 223, the eighth baffle 224 and the ninth baffle 232 in the third separation chamber 221 in turn, and the blow-by gas is separated twice in the collision process. The blow-by gas is separated into gas and oil twice; the gas enters the second separation chamber 231 from the connecting port 142; the oil in the third separation chamber 221 drips down along the multiple baffles, and flows along the inner wall of the second shell 230 to the second oil return port 225, flows back from the second oil return port 225 to the first installation chamber 160, and flows from the first installation chamber 160 to the oil pan set at the bottom.

[0134] Furthermore, the blow-by gas is separated for the third time in the second shell 230: the blow-by gas flows out from the ninth labyrinth chamber 2214 of the third separation chamber 221, and enters the tenth labyrinth chamber 2311 of the second separation chamber 231 through the connecting port 142; the blow-by gas flows horizontally through the tenth labyrinth chamber 2311, the eleventh labyrinth chamber 2312 and the twelfth labyrinth chamber 2313 in turn, and is discharged from the air outlet 235 set at the top of the twelfth labyrinth chamber 2313.

[0135] Meanwhile, the blow-by gas hits the ninth partition plate 232, the tenth partition plate 233 and the eleventh partition plate 234 in turn, and the blow-by gas is finally separated in this collision process. The blow-by gas is finally separated into gas and part of the oil; wherein the gas is discharged from the gas outlet 235; wherein the oil in the second separation chamber 231 drips downward along the multiple partition plates, and flows along the inner wall of the second shell 230 to the second oil return hole 143, flows from the second oil return hole 143 into the third separation chamber 221 and flows back from the second oil return port 225 to the first installation chamber 160, and flows from the first installation chamber 160 to the oil pan set at the bottom.

[0136] In summary, the engine 010 and the motorcycle provided by the embodiment of the present invention effectively improve the efficiency and degree of oil-gas separation of blowby gas by providing a multi-stage oil-gas separation structure 200 with multiple labyrinth chambers and partitions; not only greatly reduces the blowby gas content in the engine oil and extends the service life of the engine oil; but also reduces the blowby gas mixed into the lubrication system, reduces the wear and corrosion of the parts of the engine 010, and protects environmental emissions; it also balances the gas pressure in the crankcase 100, ensuring the reliability and stability of the operation of the engine 010.

[0137] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An engine, characterized in that: include: Crankcase; An oil-gas separation structure, wherein the crankcase is provided with the oil-gas separation structure, wherein an oil-gas separation chamber and an air inlet, an air outlet and an oil return port connected to the oil-gas separation chamber are provided in the oil-gas separation structure, wherein the oil-gas separation chamber is connected to the crankcase through the air inlet, the air outlet is connected to the external environment, and the oil return port is connected to the interior of the crankcase; A plurality of partitions are arranged in the oil-gas separation chamber, and the plurality of partitions separate the oil-gas separation chamber into a plurality of interconnected labyrinth chambers to separate the mixed oil and gas.

2. The engine according to claim 1, characterized in that The oil-gas separation structure comprises at least two shells which are connected and communicated in sequence, a separation cavity is formed in each of the at least two shells, and the at least two shells are provided with the air inlet, the air outlet and the oil return port; The plurality of partitions are disposed in at least two of the separation chambers and are connected to form the oil-gas separation chamber.

3. The engine according to claim 2, characterized in that The oil-gas separation structure comprises a first shell, a second shell and a third shell connected in sequence; A first separation chamber is formed inside the first shell, and the first shell is provided with the air inlet and the first outlet communicated with the first separation chamber; A second separation chamber is formed inside the second shell, and the second shell is provided with the gas outlet and the second inlet communicated with the second separation chamber; A third separation chamber is formed inside the third shell, and the third shell is provided with a first inlet and a second outlet communicating with the third separation chamber, the second outlet is arranged away from the first inlet, the first inlet is communicated with the first outlet, and the second inlet is communicated with the second outlet; The first shell and / or the second shell and / or the third shell are provided with the oil return port, and the first separation chamber, the second separation chamber and the third separation chamber are all provided with the plurality of partitions and are connected to form the oil-gas separation chamber.

4. The engine according to claim 3, characterized in that The crankcase comprises a right cover, a first sealing gasket, a right case body, a second sealing gasket and a left case body which are sealed and connected in sequence; The first shell is connected to the right cover and the connection surface is the first connection surface; the second shell is connected to the right box body and the connection surface is the second connection surface; the third shell is connected to the left box body and the connection surface is the third connection surface; The first shell is integrally formed with the right cover, the second shell is integrally formed with the right box body, and the third shell is integrally formed with the left box body.

5. The engine according to claim 4, characterized in that The first shell is located obliquely above the right cover; The first separation chamber is provided with a first partition, a second partition, a third partition, a fourth partition and a fifth partition, so that the first separation chamber forms a first labyrinth chamber, a second labyrinth chamber, a third labyrinth chamber, a fourth labyrinth chamber and a fifth labyrinth chamber which are connected in sequence, and the fifth labyrinth chamber is located at the top of the first separation chamber; The first sealing gasket is sealed and connected to the open end of the first shell, and the first sealing gasket is provided with a first air inlet, a second air inlet, the first outlet and a first oil return hole, the first outlet is arranged relative to the fifth labyrinth chamber, and the first oil return hole is arranged at the bottom of the first separation chamber; The first connecting surface is provided with a first oil return port, and the first oil return port is located at the bottom of the first separation chamber.

6. The engine according to claim 5, characterized in that An annular mounting portion is transversely provided in the first shell, the first baffle connects the upper inner wall of the first shell and the upper outer wall of the annular mounting portion, the second baffle connects the right inner wall of the first shell, the third baffle connects the lower outer wall of the annular mounting portion, the fourth baffle connects the first connecting surface, and the fifth baffle is located above the fourth baffle and connected to the first connecting surface; The first air inlet is arranged relative to the first labyrinth chamber, the second air inlet is arranged relative to the second labyrinth chamber, and the first oil return port is located at the bottom of the third labyrinth chamber.

7. The engine according to claim 4, characterized in that The third shell is located above the left box body, and the sixth partition, the seventh partition and the eighth partition are arranged in the third separation chamber, so that the third separation chamber forms a sixth labyrinth chamber, a seventh labyrinth chamber, an eighth labyrinth chamber and a ninth labyrinth chamber, and the sixth labyrinth chamber, the seventh labyrinth chamber, the eighth labyrinth chamber and the ninth labyrinth chamber are arranged horizontally and connected in sequence; One side of the second sealing gasket is sealed and connected to the open end of the third shell. The first inlet and the connecting port are arranged on the second sealing gasket. The first inlet is arranged relative to the sixth labyrinth chamber. One side of the connecting port is the second inlet, and the other side is the second outlet. The connecting port is arranged relative to the ninth labyrinth chamber.

8. The engine according to claim 7, characterized in that The second shell is arranged relative to the third shell and is located above the right box body, and the ninth partition, the tenth partition and the eleventh partition are arranged in the third separation chamber, so that the third separation chamber forms the tenth labyrinth chamber, the eleventh labyrinth chamber and the twelfth labyrinth chamber, and the tenth labyrinth chamber, the eleventh labyrinth chamber and the twelfth labyrinth chamber are arranged horizontally and are connected in sequence; The air outlet is arranged at the top of the third shell; The other side of the second sealing gasket is sealed and connected to the opening end of the second shell, and the tenth labyrinth cavity is arranged opposite to the connecting port.

9. The engine according to claim 8, characterized in that A second oil return port is provided at the bottom of the third housing, the second oil return port is located at the bottom of the third separation chamber, and the second oil return port is connected to the interior of the crankcase; The second sealing gasket is provided with a second oil return hole, the second oil return hole communicates with the third separation chamber and the second separation chamber, and the second oil return port is located below the second oil return hole.

10. A motorcycle, characterized in that: include: An engine as claimed in any one of claims 1 to 9.

Images