Engine and motorcycle

Abstract

This invention discloses an engine and a motorcycle, relating to the field of engine technology. The engine includes a housing structure with mutually isolated oil supply and return chambers. A main oil pump mounting section is provided on the housing structure for mounting the main oil pump. The main oil pump mounting section has an oil inlet chamber corresponding to the main oil pump's inlet end. An oil suction channel is provided inside the housing structure, with one end connected to the oil inlet chamber and the other end connected to the oil supply chamber. The oil suction channel is used by the main oil pump to pump oil from the oil supply chamber into the engine's main oil circuit. The engine provided by this invention has a more compact and reliable structure, integrating oil suction, filtration, and discharge functions into the housing structure.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and more specifically, to an engine and a motorcycle. Background Technology

[0002] The main oil pump on a motorcycle engine is used to pump the oil from the oil pan into the main oil circuit, thereby lubricating the various components.

[0003] Currently, most motorcycle engines on the market are equipped with a fuel suction line. One end of the fuel suction line is connected to the fuel inlet of the main fuel pump, and the other end extends into the oil pan. The layout of the fuel suction line is complex, has a high risk of damage, and affects the compactness and reliability of the overall engine structure. Summary of the Invention

[0004] The purpose of this invention is to provide an engine with a more compact and reliable structure, which integrates oil intake, filtration and oil discharge functions into the housing structure.

[0005] Another objective of this invention is to provide a motorcycle with a more compact and reliable structure, which integrates oil absorption, filtration and oil discharge functions into the housing structure.

[0006] An embodiment of the present invention provides a technical solution:

[0007] An engine includes a housing structure having an oil supply chamber and an oil return chamber that are isolated from each other. The housing structure has a main oil pump mounting portion for mounting a main oil pump. The main oil pump mounting portion has an oil inlet chamber corresponding to the oil inlet end of the main oil pump. An oil suction channel is provided inside the housing structure. One end of the oil suction channel communicates with the oil inlet chamber, and the other end of the oil suction channel communicates with the oil supply chamber. The oil suction channel is used for the main oil pump to pump oil from the oil supply chamber into the engine's main oil circuit.

[0008] Furthermore, the housing structure includes a lower housing and an oil pan, the oil pan being connected to the lower housing and together forming the oil supply chamber and the oil return chamber, and the main oil pump mounting part being disposed on the lower housing;

[0009] The lower housing contains a portion of the oil suction channel, and the oil pan contains the remaining portion of the oil suction channel.

[0010] Furthermore, a fourth channel is provided in the lower housing, and a fifth channel is provided in the oil pan. One end of the fourth channel is connected to the oil inlet chamber, the end of the fourth channel away from the oil inlet chamber is connected to one end of the fifth channel, and the other end of the fifth channel is connected to the oil supply chamber.

[0011] Furthermore, an installation channel is provided on the outer surface of the oil pan, and the installation channel is coaxially connected to the fifth channel;

[0012] The engine also includes an oil filter element, which extends into the bottom of the oil supply chamber through the mounting channel and the fifth channel in sequence, and the oil filter element is detachably connected to the mounting channel.

[0013] Furthermore, a first seal and a second seal are fitted on the outer surface of the oil filter element. The first seal abuts against the inner sidewall of the fifth channel in a circumferential manner, and the second seal abuts against the inner sidewall of the mounting channel in a circumferential manner.

[0014] Furthermore, a limiting protrusion is provided on the inner surface of the bottom wall of the oil pan, the limiting protrusion is located in the oil supply chamber, and one end of the oil filter extending into the oil supply chamber cooperates with the limiting protrusion.

[0015] Furthermore, the lower housing includes a top wall and a fifth cylinder protruding from the inner surface of the top wall. The fifth cylinder is located within the oil return chamber and forms the fourth channel. The bottom end of the fifth cylinder is connected to the oil pan.

[0016] Furthermore, the oil pan includes a bottom wall and a sixth cylinder protruding from the inner surface of the bottom wall. The sixth cylinder is located within the oil return chamber and forms a fourth branch channel. A fifth branch channel is provided within the bottom wall. One end of the fourth branch channel and one end of the fifth branch channel are connected at an angle to form the fifth channel. The end of the fifth branch channel away from the fourth branch channel is connected to the bottom end of the oil supply chamber. The top end of the sixth cylinder is connected to the lower housing.

[0017] Furthermore, a second partition rib is provided on the inner surface of the bottom wall of the oil pan. The oil supply chamber and the oil return chamber are located on opposite sides of the second partition rib. The opening of the fifth branch channel at the end away from the fourth branch channel is located at the bottom of the side of the oil supply chamber surrounded by the second partition rib.

[0018] An embodiment of the present invention also provides a motorcycle, including the aforementioned engine. The engine includes a housing structure having mutually isolated oil supply chambers and oil return chambers. The housing structure is provided with a main oil pump mounting part for mounting a main oil pump. The main oil pump mounting part has an oil inlet chamber corresponding to the oil inlet end of the main oil pump. An oil suction channel is provided inside the housing structure. One end of the oil suction channel is connected to the oil inlet chamber, and the other end of the oil suction channel is connected to the oil supply chamber. The oil suction channel is used for the main oil pump to pump the oil in the oil supply chamber into the main oil circuit of the engine.

[0019] Compared to existing technologies, the engine provided by this invention has its oil suction channel formed inside the housing structure, eliminating the need for additional oil suction pipes. This results in a more compact engine structure, lower risk of damage, and greater safety and reliability. Therefore, the beneficial effects of the engine provided by this invention include: a more compact and reliable structure, and the integration of oil suction, filtration, and draining functions within the housing structure. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A first cross-sectional schematic diagram of the engine component structure provided for an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the engine section structure provided in an embodiment of the present invention from a first perspective;

[0023] Figure 3 This is a structural schematic diagram of the lower housing;

[0024] Figure 4 This is a schematic diagram of the oil pan structure;

[0025] Figure 5 A second cross-sectional schematic diagram of the engine section structure provided for an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the engine component structure provided in an embodiment of the present invention from a second perspective;

[0027] Figure 7 A third cross-sectional view of the engine component structure provided for an embodiment of the present invention;

[0028] Figure 8 A cross-sectional view of the engine section structure when connected to the oil cooler, provided for an embodiment of the present invention;

[0029] Figure 9 A schematic diagram of the engine component structure from a third-person perspective, provided for an embodiment of the present invention;

[0030] Figure 10 A fourth cross-sectional view of the engine component structure provided for an embodiment of the present invention;

[0031] Figure 11This is a structural schematic diagram of an oil filter element;

[0032] Figure 12 This is a schematic diagram of the left cover.

[0033] Figure 13 A schematic diagram of the engine component structure from a fourth perspective, provided for an embodiment of the present invention;

[0034] Figure 14 for Figure 5 Enlarged view of region A in the middle;

[0035] Figure 15 for Figure 5 Enlarged schematic diagram of region B in the middle.

[0036] Icons: 10-Engine; 100-Box structure; 110-Lower box; 111-Crankshaft cavity; 1111-Crankshaft mounting part; 1112-Balance shaft mounting part; 112-First skirt; 1121-First partition rib; 113-Auxiliary oil pump mounting part; 1131-Oil outlet chamber; 1141-First channel; 1142-Second channel; 115-Top wall; 1151-Third cylinder; 1152-Fourth cylinder; 1153-Injector port; 1155-Reinforcing rib; 1156-Fifth Cylinder body; 116-Main oil pump mounting part; 1161-Oil inlet chamber; 117-Fourth channel; 120-Oil pan; 121-Second skirt; 1211-Second partition rib; 122-First branch channel; 123-Second branch channel; 1231-Internal thread mounting part; 124-Third branch channel; 125-Bottom wall; 1251-First cylinder body; 1252-Second cylinder body; 1253-Sixth cylinder body; 1254-Fourth branch channel; 1255-Fifth branch channel; 1256- Limiting protrusion; 126-Installation channel; 130-Oil return chamber; 140-Oil supply chamber; 141-Filling port; 142-Exhaust port; 150-First interface; 151-First sealing element; 160-Second interface; 161-Second sealing element; 170-Left cover; 171-Filling chamber; 172-Oil dipstick; 173-Overflow notch; 174-Overflow channel; 200-Crankshaft; 210-Drive gear; 300-Balance shaft; 310-Driven gear; 320-Drive sprocket; 330- Second flat square pin; 400-Main oil pump; 410-First drive shaft; 411-First flat square pin; 500-Auxiliary oil pump; 510-Second drive shaft; 511-Driven sprocket; 512-First flat square hole; 600-Third sealing element; 700-Oil filter element; 710-First seal; 720-Second seal; 800-Drive chain; 910-Water pump; 911-Third drive shaft; 912-Second flat square hole; 913-Misalignment clearance; 920-Right cover; 930-Oil cooler. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to 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.

[0041] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0042] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0044] Example

[0045] Please see Figure 1 , Figure 1The diagram shown is a first cross-sectional view of the structure of the engine 10 parts provided in this embodiment.

[0046] The engine 10 provided in this embodiment includes a housing structure 100, which includes a lower housing 110 and an oil pan 120. The top of the lower housing 110 is provided with a crankshaft cavity 111, and the bottom of the lower housing 110 is connected to the oil pan 120, together forming a mutually isolated oil return cavity 130 and an oil supply cavity 140. The oil return cavity 130 is located at the front end of the lower housing 110, and the oil supply cavity 140 is located at the rear end of the lower housing 110. The top of the oil return cavity 130 is connected to the bottom of the crankshaft cavity 111.

[0047] Compared to the prior art where the oil supply chamber 140 encloses the oil return chamber 130, in this embodiment the oil return chamber 130 and the oil supply chamber 140 are arranged sequentially in the front-to-back direction. The oil return chamber 130 is not enclosed by the oil supply chamber 140. During the process of laying out the oil circuit inside the oil return chamber 130 and during maintenance, it is not blocked by the oil supply chamber 140, which is more convenient and faster.

[0048] Please refer to the following: Figure 2 , Figure 2 The diagram shown is a structural schematic of the engine 10 parts from a first-view perspective.

[0049] The engine 10 provided in this embodiment also includes a crankshaft 200 and a balance shaft 300. A crankshaft mounting portion 1111 and a balance shaft mounting portion 1112 are respectively provided on the cavity wall of the crankshaft cavity 111. The crankshaft mounting portion 1111 and the balance shaft mounting portion 1112 are arranged at intervals in the front-rear direction. The crankshaft 200 is mounted on the crankshaft mounting portion 1111, and the balance shaft 300 is mounted on the balance shaft mounting portion 1112.

[0050] The oil return chamber 130 is used to recover the engine oil in the crankshaft chamber 111. In order to improve the oil return efficiency, in this embodiment, the oil return chamber 130 is located between the crankshaft mounting part 1111 and the balance shaft mounting part 1112 in the front-to-back direction.

[0051] In practical applications, the crankshaft 200 and the balance shaft 300 reverse each other. The oil thrown out by the crankshaft 200 and the balance shaft 300 approaches each other under the action of inertia and gravity, and falls on the area where the bottom wall 125 of the crankshaft cavity 111 connects with the oil return cavity 130. This greatly shortens the flow path of the oil thrown out by the crankshaft 200 and the balance shaft 300, and allows it to quickly enter the oil return cavity 130.

[0052] Please continue reading. Figure 1 In order to further improve the oil recovery efficiency in the crankshaft cavity 111, in this embodiment, the inner surface of the bottom wall 125 of the crankshaft cavity 111 is inclined in the front-back direction, and the lower end of the bottom wall 125 of the crankshaft cavity 111 in the vertical direction is connected to the oil return cavity 130.

[0053] The inner surface of the bottom wall 125 of the crankshaft cavity 111 guides the oil in the crankshaft cavity 111. In practical applications, the oil in the bottom wall 125 of the crankshaft cavity 111 flows to the lower end in the vertical direction under the action of gravity, and then quickly flows back into the oil return chamber 130.

[0054] Please refer to the following: Figure 3 and Figure 4 , Figure 3 The diagram shown is a structural schematic of the lower housing 110. Figure 4 The diagram shown is a structural schematic of the oil pan 120.

[0055] The bottom periphery of the lower housing 110 is provided with a first skirt 112, and a first partition rib 1121 is provided in the area enclosed by the first skirt 112. The periphery of the oil pan 120 is provided with a second skirt 121, and a second partition rib 1211 is provided in the area enclosed by the second skirt 121. The first skirt 112 and the second skirt 121 are fastened together to form a main chamber, and the first partition rib 1121 and the second partition rib 1211 are connected to divide the main chamber into an oil return chamber 130 and an oil supply chamber 140.

[0056] Understandably, during the actual assembly process, when assembling the oil pan 120 onto the lower housing 110, it is only necessary to align and fasten the second skirt 121 with the first skirt 112. Once fastened, the first partition rib 1121 and the second partition rib 1211 are then aligned and connected. The first partition rib 1121 and the second partition rib 1211 together divide the space enclosed by the first skirt 112 and the second skirt 121 into an oil return chamber 130 and an oil supply chamber 140, ensuring that the oil return chamber 130 and the oil supply chamber 140 are not connected.

[0057] Please refer to the following: Figure 5 , Figure 5 The diagram shown is a second cross-sectional view of the engine 10 structure provided in this embodiment.

[0058] The engine 10 also includes a main oil pump 400 and an auxiliary oil pump 500. In order to improve the compactness of the overall structure, the main oil pump 400 and the auxiliary oil pump 500 are respectively located on the left and right sides of the front end of the lower housing 110. The main oil pump 400 is used to pump the oil in the oil supply chamber 140 into the main oil passage of the engine 10, and the auxiliary oil pump 500 is used to pump the oil in the oil return chamber 130 into the oil supply chamber 140.

[0059] To further simplify the structure and improve its compactness, in this embodiment, the additional oil pipeline is eliminated. An oil suction channel and an oil replenishment channel are formed inside the housing structure 100. The oil inlet end of the main oil pump 400 is connected to one end of the oil suction channel, and the other end of the oil suction channel is connected to the bottom end of the oil supply chamber 140. The oil outlet end of the auxiliary oil pump 500 is connected to one end of the oil replenishment channel, and the other end of the oil replenishment channel is connected to the top end of the oil supply chamber 140.

[0060] In practical applications, when the main oil pump 400 is running, its inlet end draws oil from the oil supply chamber 140 through the oil suction channel, and the drawn oil is pumped into the main oil circuit of the engine 10 through its outlet end. When the auxiliary oil pump 500 is running, its inlet end draws oil from the return oil chamber 130, and the drawn oil is pumped into the replenishment oil channel through its outlet end, and then sent into the oil supply chamber 140 through the replenishment oil channel. It can be seen that the engine 10 provided in this embodiment has its oil suction channel and replenishment oil channel directly formed on the housing structure 100, eliminating the need for additional oil supply pipelines and further simplifying the overall structure.

[0061] Please refer to the following: Figure 6 and Figure 7 , Figure 6 The image shown is a schematic diagram of the engine 10 component structure provided in this embodiment from a second perspective. Figure 7 The diagram shown is a third cross-sectional view of the engine's 10-part structure.

[0062] In this embodiment, the housing structure 100 is provided with an auxiliary oil pump mounting part 113 for mounting the auxiliary oil pump 500. Specifically, the auxiliary oil pump mounting part 113 is located on the lower housing 110. The auxiliary oil pump mounting part 113 has an oil outlet chamber 1131 corresponding to the oil outlet end of the auxiliary oil pump 500. One end of the oil replenishment channel is connected to the oil outlet chamber 1131, and the other end of the oil replenishment channel is connected to the oil supply chamber 140.

[0063] Specifically, the lower housing 110 is provided with a first channel 1141 and a second channel 1142, and the oil pan 120 is provided with a third channel. The two ends of the third channel are respectively connected to one end of the first channel 1141 and one end of the second channel 1142 to form an oil replenishment channel. The end of the first channel 1141 away from the third channel is connected to the oil outlet chamber 1131, and the end of the second channel 1142 away from the third channel is connected to the oil supply chamber 140.

[0064] During the operation of the auxiliary oil pump 500, its inlet end draws in the oil from the return oil chamber 130 and pumps it into the first channel 1141 on the lower housing 110 through its outlet end. The oil flows along the first channel 1141 into the third channel on the oil pan 120, then into the second channel 1142 on the lower housing 110, and finally into the supply oil chamber 140 through the second channel 1142, thus completing the transfer of oil from the return oil chamber 130 to the supply oil chamber 140.

[0065] The oil pan 120 is provided with a first branch channel 122, a second branch channel 123 and a third branch channel 124 that form a third channel. The two ends of the second branch channel 123 are respectively connected to one end of the first branch channel 122 and one end of the third branch channel 124 at an angle. The end of the first branch channel 122 away from the second branch channel 123 is connected to the first channel 1141, and the end of the third branch channel 124 away from the second branch channel 123 is connected to the second channel 1142.

[0066] Please refer to the following: Figure 4 Specifically, the oil pan 120 includes a bottom wall 125 and a first cylinder 1251 and a second cylinder 1252 protruding from the inner surface of the bottom wall 125. The first cylinder 1251 is located in the oil return chamber 130, and the second cylinder 1252 is located in the oil supply chamber 140. The top ends of the first cylinder 1251 and the second cylinder 1252 are connected to the lower housing 110. The first cylinder 1251 forms a first branch channel 122, the second branch channel 123 is located in the bottom wall 125, and the second cylinder 1252 forms a third branch channel 124.

[0067] In fact, the auxiliary oil pump mounting part 113 is located above the return oil chamber 130. The first cylinder 1251 and the second cylinder 1252 extend approximately vertically. The bottom ends of both the first cylinder 1251 and the second cylinder 1252 are connected to the second branch channel 123 provided in the bottom wall 125 of the oil pan 120, thus forming a third channel. The top end of the first cylinder 1251 is connected to the lower housing 110, realizing the connection between the first branch channel 122 and the first channel 1141; the top end of the second cylinder 1252 is connected to the lower housing 110, realizing the connection between the third branch channel 124 and the second channel 1142.

[0068] Considering that in certain special application scenarios, an external oil cooler 930 is required to cool the engine oil, in order to facilitate the connection of the external oil cooler 930, in this embodiment, a first interface 150 and a second interface 160 are provided on the housing structure 100. Both the first interface 150 and the second interface 160 are connected to the oil replenishment channel. The first interface 150 and the second interface 160 are used to connect the oil cooler 930. The first interface 150 is detachably provided with a first sealing member 151, and the second interface 160 is detachably provided with a second sealing member 161.

[0069] Understandably, in normal application scenarios, when the oil cooler 930 is not needed to cool the engine oil, the first port 150 is blocked by the first sealing member 151, and the second port 160 is blocked by the second sealing member 161, ensuring that the engine oil does not leak during the process of being transported from the return oil chamber 130 to the supply oil chamber 140. When the external oil cooler 930 is needed to cool the engine oil, the first sealing member 151 and the second sealing member 161 are removed, and the oil cooler 930 can be connected, allowing the engine oil in the oil replenishment channel to be cooled by the oil cooler 930 before entering the supply oil chamber 140.

[0070] In this embodiment, both the first interface 150 and the second interface 160 are located on the oil pan 120, and both are connected to the third channel. Specifically, one end of the second branch channel 123 connected to the first branch channel 122 is coaxially connected to the first interface 150, and one end of the second branch channel 123 connected to the third branch channel 124 is coaxially connected to the second interface 160.

[0071] Understandably, in the direction of oil flow, the first port 150 is upstream of the second port 160. In other words, when the oil cooler 930 is connected, the oil in the oil replenishment channel flows into the oil cooler 930 through the first port 150, and after being cooled by the oil cooler 930, it flows back into the oil replenishment channel through the second port 160.

[0072] In this embodiment, both the first interface 150 and the second interface 160 are provided with internal threads, and both the first sealing member 151 and the second sealing member 161 are plugs provided with external threads. In other embodiments, the first sealing member 151 and the second sealing member 161 can be selected according to the actual application conditions, and their connection methods with the first interface 150 and the second interface 160 can be adjusted accordingly.

[0073] Please refer to the following: Figure 8 , Figure 8 The diagram shown is a cross-sectional view of the engine 10 structure provided in this embodiment when connected to the oil cooler 930.

[0074] In order to ensure that all the engine oil can be cooled and improve the cooling effect, in this embodiment, an internal threaded mounting part 1231 is provided on the inner side wall of the second branch channel 123 near the end of the first branch channel 122. The internal threaded mounting part 1231 is coaxially arranged with the first interface 150 and is used to install the third sealing member 600 to seal the second branch channel 123.

[0075] To prevent changes in flow rate and hydraulic pressure caused by the reduced cross-sectional area of ​​the oil path when it enters the oil cooler 930 through the oil replenishment channel, in this embodiment, the diameter of the internal thread mounting part 1231 is the same as the diameter of the first interface 150, which is more than 1.4 times the diameter of the oil replenishment channel. Thus, after replacing the first sealing part 151 and the second sealing part 161 with two hollow bolts of the oil cooler 930, the cross-sectional area of ​​the hollow bolts can match the current oil flow rate and velocity.

[0076] In practical applications, when an external oil cooler 930 is required, the first sealing member 151 and the second sealing member 161 are disassembled, and the third sealing member 600 is inserted from the first interface 150 through the first branch channel 122 into the second branch channel 123 and threadedly engaged with the internal threaded mounting part 1231, thereby sealing the end of the second branch channel 123 that connects to the first branch channel 122.

[0077] After connecting the input and output terminals of the oil cooler 930 to the first interface 150 and the second interface 160 respectively, the oil flowing out of the first branch channel 122 no longer enters the second branch channel 123, but flows into the oil cooler 930 through the first interface 150, and after passing through the oil cooler 930, it enters the third branch channel 124 through the second interface 160.

[0078] As can be seen, in this embodiment, with the external oil cooler 930 connected, the oil cooler 930 and the auxiliary oil pump 500 are connected in series and share the same oil circuit. This ensures that all engine oil entering the oil supply chamber 140 from the return oil tank receives cooling from the oil cooler 930. Compared to the prior art where the oil cooler 930 is connected in parallel in the oil circuit, this significantly improves the oil cooling effect, thereby enhancing the performance of the engine 10. Furthermore, compared to the prior art where the oil cooler 930 is connected in series in the main oil circuit, the auxiliary oil pump 500 has a lower pumping pressure, which helps prevent damage to the oil cooler 930, ensuring its normal operation and achieving better oil cooling.

[0079] In this embodiment, the third sealing element 600 is also a plug with external threads. Similarly, in other embodiments, the third sealing element 600 can be selected according to the actual application conditions.

[0080] The lower housing 110 includes a top wall 115 and a third cylinder 1151 and a fourth cylinder 1152 protruding from the inner surface of the top wall 115. The third cylinder 1151 is located in the oil return chamber 130, and the fourth cylinder 1152 is located in the oil supply chamber 140. The bottom ends of the third cylinder 1151 and the fourth cylinder 1152 are connected to the oil pan 120. The third cylinder 1151 forms a first channel 1141, and the fourth cylinder 1152 forms a second channel 1142. An oil spray port 1153 is provided on the inner surface of the top wall 115 of the lower housing 110, and the oil spray port 1153 is connected to the second channel 1142.

[0081] It is understandable that the oil injector 1153 is located on the inner surface of the top wall 115 of the lower housing 110, which ensures that the oil output from the oil replenishment channel falls onto the surface of the oil in the oil supply chamber 140 in a sprayed state, thereby avoiding the generation of air bubbles.

[0082] In fact, both the third cylinder 1151 and the fourth cylinder 1152 extend roughly vertically. The top end of the third cylinder 1151 is connected to the oil outlet chamber 1131 of the auxiliary oil pump mounting part 113, and the bottom end of the third cylinder 1151 is connected to the top end of the first cylinder 1251, thereby connecting the first channel 1141 and the first branch channel 122. The bottom end of the fourth cylinder 1152 is connected to the top end of the second cylinder 1252, thereby connecting the second channel 1142 and the third branch channel 124.

[0083] In this embodiment, the number of fuel injectors 1153 is at least one, including a first fuel injector and a second fuel injector sequentially distributed around the periphery of the fourth cylinder 1152, with the first and second fuel injectors eccentrically positioned relative to the fourth cylinder 1152. A reinforcing rib 1155 is provided between the first and second fuel injectors, with one end of the reinforcing rib 1155 connected to the fourth cylinder 1152 and the other end connected to the side wall of the oil supply chamber 140. To prevent oil from being ejected at excessive pressure, in this embodiment, the sum of the areas of the plurality of fuel injectors 1153 is greater than or equal to the minimum cross-sectional area of ​​the oil replenishment channel.

[0084] The fuel injector 1153 is located above the fuel supply chamber 140. The distance from the lowest point of the fuel injector 1153 to the lowest surface of the oil pan 120 is set as Y, and the distance from the highest point of the fuel supply chamber 140 to the lowest surface of the oil pan 120 is set as X. In this embodiment, Y / X > 0.8, ensuring that the fuel outlet is above the highest liquid level in the fuel supply chamber 140, thus preventing air bubbles from mixing into the engine oil.

[0085] In addition, in order to facilitate the molding of the oil injection port 1153, this embodiment adopts the method of making a hole in the bottom wall of the crankshaft cavity 111 to penetrate to the top wall of the oil supply cavity 140, and using a plug to seal the part connecting the crankshaft cavity 111, thereby preventing engine oil from entering the crankshaft cavity 111.

[0086] Please refer to the following: Figure 9 and Figure 10 , Figure 9 The image shown is a schematic diagram of the engine 10 components provided in this embodiment from a third-person perspective. Figure 10 The diagram shown is a fourth cross-sectional view of the engine's 10-part structure.

[0087] The housing structure 100 is provided with a main oil pump mounting part 116 for mounting the main oil pump 400. Specifically, the main oil pump mounting part 116 is located on the lower housing 110. The main oil pump mounting part 116 has an oil inlet chamber 1161 corresponding to the oil inlet end of the main oil pump 400. One end of the oil suction channel is connected to the oil inlet chamber 1161, and the other end of the oil suction channel is connected to the oil supply chamber 140. The oil suction channel is used for the main oil pump 400 to pump the oil in the oil supply chamber 140 into the main oil circuit of the engine 10.

[0088] Specifically, a fourth channel 117 is provided inside the lower housing 110, and a fifth channel is provided inside the oil pan 120. One end of the fourth channel 117 is connected to the oil inlet chamber 1161, the end of the fourth channel 117 away from the oil inlet chamber 1161 is connected to one end of the fifth channel, and the other end of the fifth channel is connected to the oil supply chamber 140.

[0089] During the operation of the main oil pump 400, the oil in the oil supply chamber 140 enters the oil inlet of the main oil pump 400 through the fifth channel and the fourth channel 117 in sequence, and is then pumped into the main oil circuit of the engine 10 by the oil outlet of the main oil pump 400.

[0090] A fifth cylinder 1156 is also protruding on the inner surface of the top wall 115 of the lower housing 110. The fifth cylinder 1156 is located in the oil return chamber 130. The fifth cylinder 1156 forms the fourth channel 117. The bottom end of the fifth cylinder 1156 is connected to the oil pan 120.

[0091] Correspondingly, a sixth cylinder 1253 is also protruding on the inner surface of the bottom wall 125 of the oil pan 120. The sixth cylinder 1253 is located in the oil return chamber 130. The sixth cylinder 1253 forms a fourth branch channel 1254. A fifth branch channel 1255 is provided in the bottom wall 125. One end of the fourth branch channel 1254 and one end of the fifth branch channel 1255 are connected at an angle to form a fifth channel. The end of the fifth branch channel 1255 away from the fourth branch channel 1254 is connected to the bottom end of the oil supply chamber 140. The top end of the sixth cylinder 1253 is connected to the lower housing 110.

[0092] In fact, both the fifth cylinder 1156 and the sixth cylinder 1253 extend roughly vertically. The top of the fifth cylinder 1156 connects to the oil inlet chamber 1161, and the bottom of the fifth cylinder 1156 connects to the bottom of the sixth cylinder 1253, thus connecting the fourth channel 117 and the fourth branch channel 1254. During the operation of the main oil pump 400, the oil in the oil supply chamber 140 first enters the fifth channel located inside the bottom wall 125 of the oil pan 120, then enters the sixth cylinder 1253 through the fifth channel, then enters the fifth cylinder 1156 through the sixth cylinder 1253, and finally enters the main oil pump 400 through the oil inlet chamber 1161.

[0093] In this embodiment, the inner surface of the bottom wall 125 of the oil pan 120 is raised in a part of the area corresponding to the oil return cavity 130. The fifth branch channel 1255 is located inside the raised structure, and the opening of the fifth branch channel 1255 away from the fourth branch channel 1254 is located at the bottom of the side of the oil supply cavity 140 surrounded by the second partition rib 1211, thereby realizing the communication between the fifth branch channel 1255 and the bottom of the oil supply cavity 140.

[0094] An installation channel 126 is provided on the outer surface of the oil pan 120. One end of the fifth branch channel 1255, which connects to the fourth branch channel 1254, is coaxially connected to the installation channel 126. The engine 10 also includes an oil filter 700, which extends into the bottom of the oil supply chamber 140 through the installation channel 126 and the fifth branch channel 1255. The oil filter 700 is detachably fitted to the installation channel 126.

[0095] Understandably, in practical applications, when it is necessary to install the oil filter 700, simply insert the oil filter 700 through the installation channel 126, pass it through the fifth branch channel 1255, and extend it into the bottom of the oil supply chamber 140. Then, connect the oil filter 700 to the installation channel 126. When it is necessary to remove the oil filter 700 for cleaning or replacement, or when it is necessary to drain the oil from the return chamber 130 and the oil supply chamber 140, simply disconnect the oil filter 700 from the installation channel 126 to remove the oil filter 700.

[0096] Please refer to the following: Figure 11 , Figure 11 The diagram shown is a structural schematic of the oil filter element 700.

[0097] To ensure the sealing between the oil filter element 700 and the installation channel 126 to prevent oil leakage, and to ensure the sealing between the oil filter element 700 and the fifth branch channel 1255 to ensure the oil filtration effect, in this embodiment, a first sealing element 710 and a second sealing element 720 are sleeved on the outer surface of the oil filter element 700. The first sealing element 710 abuts against the inner sidewall of the fifth branch channel 1255 circumferentially, and the second sealing element 720 abuts against the inner sidewall of the installation channel 126 circumferentially.

[0098] In fact, the oil filter element 700 has an internal channel for oil flow. The portion of the oil filter element 700 that extends into the oil supply chamber 140 is covered with a filter screen, which communicates with the internal channel. The oil in the oil supply chamber 140 is filtered by the filter screen and then enters the internal channel of the oil filter element 700. An opening is provided on the oil filter element 700 between the first seal 710 and the second seal 720. The internal channel delivers the filtered oil into the fourth branch channel 1254 through this opening.

[0099] In this embodiment, the outermost end of the oil filter element 700 is provided with an external thread, and the mounting channel 126 is provided with an internal thread, and the oil filter element 700 and the mounting channel 126 are threadedly engaged. In other embodiments, the connection method between the oil filter element 700 and the mounting channel 126 is also adjusted according to the actual application conditions.

[0100] To further position the oil filter element 700 and fix it to the bottom wall 125 of the oil supply chamber 140, in this embodiment, a limiting protrusion 1256 is provided on the inner surface of the bottom wall 125 of the oil pan 120. The limiting protrusion 1256 is located inside the oil supply chamber 140, and one end of the oil filter element 700 extending into the oil supply chamber 140 engages with the limiting protrusion 1256. Specifically, in this embodiment, the end of the oil filter element 700 extending into the oil supply chamber 140 is cylindrical, and there are two limiting protrusions 1256. The two limiting protrusions 1256 are opposite to each other and spaced apart. Both limiting protrusions 1256 are provided with arc-shaped stepped surfaces, and the two stepped surfaces are opposite to each other to achieve the locking and fixing of the end of the oil filter element 700.

[0101] The enclosure structure 100 also includes the left cover 170; please refer to the relevant documentation. Figure 12 , Figure 12 The diagram shown is a structural schematic of the left cover 170.

[0102] The left cover 170 is connected to the left side surface of the lower housing 110. The left cover 170 is provided with a filling chamber 171. A filling port 141 is provided through the left side wall of the oil supply chamber 140. The filling port 141 is connected to the filling chamber 171. A removable dipstick 172 is provided on the wall of the filling chamber 171. The dipstick 172 extends into the oil supply chamber 140 through the filling port 141.

[0103] Understandably, in practical applications, users can remove the dipstick 172 from the left cover 170 and pull it out to read the oil level data in the oil supply chamber 140. If the oil level in the oil supply chamber 140 is too low, oil can be added to the oil supply chamber 140 through the filler chamber 171 and the filler port 141.

[0104] An overflow notch 173 is provided on the wall of the filling chamber 171. The vertical height of the overflow notch 173 is lower than the position of the dipstick 172. An overflow channel 174 is also provided on the left cover 170. The overflow channel 174 is connected to the overflow notch 173 and the return oil chamber 130, and is used to guide the oil flowing out of the overflow notch 173 into the return oil chamber 130.

[0105] When the oil level in the oil supply chamber 140 reaches a certain level, the oil will flow into the filling chamber 171 through the oil port. When the oil level is too high, the oil level in the filling chamber 171 will reach the overflow gap 173 and flow into the overflow channel 174 through the overflow gap 173. The overflow channel 174 will then guide the overflowing oil into the return oil chamber 130, thereby preventing excessive oil in the oil supply chamber 140.

[0106] In order to ensure pressure balance in the oil supply chamber 140 and to ensure that the main oil pump 400 can smoothly pump the oil in the oil supply chamber 140 into the main oil passage, in this embodiment, an exhaust port 142 communicating with the crankshaft chamber 111 is provided on the top wall 115 of the oil supply chamber 140. The height of the exhaust port 142 in the vertical direction is higher than the overflow notch 173.

[0107] It is understood that the crankshaft 200 and the balance shaft 300 are connected in a transmission manner. In this embodiment, a driving gear 210 is coaxially arranged on the crankshaft 200, and a driven gear 310 is coaxially arranged on the balance shaft 300. The driving gear 210 and the driven gear 310 mesh. During the rotation of the crankshaft 200, the driving gear 210 drives the driven gear 310 to rotate, and the driven gear 310 drives the balance shaft 300 to rotate.

[0108] The main oil pump 400 is provided with a first drive shaft 410, which is connected to the rotor of the main oil pump 400. The auxiliary oil pump 500 is provided with a second drive shaft 510, which is connected to the rotor of the auxiliary oil pump 500. In order to improve the overall structural compactness, in this embodiment, the first drive shaft 410 is connected to the balance shaft 300 through the second drive shaft 510.

[0109] In practical applications, as the balance shaft 300 rotates with the crankshaft 200, the crankshaft 200 drives the first drive shaft 410 and the second drive shaft 510 to rotate, thereby achieving unified power output to the main oil pump 400 and the auxiliary oil pump 500. This eliminates the need to configure separate transmission mechanisms for the main oil pump 400 and the auxiliary oil pump 500, saves installation space, and improves the structural compactness of the engine 10.

[0110] Please refer to the following: Figure 13 , Figure 13 The diagram shown is a structural schematic of the engine 10 parts provided in this embodiment from a fourth-view perspective.

[0111] In this embodiment, a drive sprocket 320 is coaxially disposed on the balance shaft 300, a driven sprocket 511 is coaxially disposed on the second drive shaft 510, and the engine 10 also includes a transmission chain 800, with the drive sprocket 320 connected to the driven sprocket 511 via the transmission chain 800.

[0112] It is understandable that by adjusting the model of the drive sprocket 320 and the driven sprocket 511, the rotational speed of the second drive shaft 510 can be adjusted.

[0113] Please refer to the following: Figure 14 , Figure 14 As shown Figure 5 An enlarged schematic diagram of region A in the middle.

[0114] In this embodiment, a first flat square pin 411 is coaxially provided at one end of the first drive shaft 410, and a first flat square hole 512 is coaxially provided at one end of the second drive shaft 510, with the first flat square pin 411 and the first flat square hole 512 being inserted into each other.

[0115] In practical applications, as the second drive shaft 510 rotates under the drive of the balance shaft 300, the wall of its first flat square hole 512 exerts a force on the first flat square pin 411, thereby driving the first drive shaft 410 to rotate synchronously. It can be understood that although the first drive shaft 410 and the second drive shaft 510 rotate synchronously, the different pumping volumes of the main oil pump 400 and the auxiliary oil pump 500 can be achieved by adjusting the rotor thickness of each.

[0116] In this embodiment, the main oil pump 400 is located on the left side of the lower housing 110, the auxiliary oil pump 500 is located on the right side of the lower housing 110, and the balance shaft 300 extends in the left-right direction.

[0117] The engine 10 also includes a water pump 910, which is mounted on the housing structure 100. The water pump 910 is provided with a third drive shaft 911 connected to an internal impeller. The third drive shaft 911 is connected to the balance shaft 300.

[0118] As can be seen, in this embodiment, the balance shaft 300 provides power not only to the main oil pump 400 and the auxiliary oil pump 500, but also to the water pump 910. The balance shaft 300 drives the third drive shaft 911 to rotate, thereby driving the impeller inside the water pump 910 to rotate, and pressing the cooling water into the water jacket of the engine 10 to achieve cooling circulation.

[0119] The housing structure 100 also includes a right cover 920, a main oil pump 400 located in the cavity formed by the left cover 170 and the lower housing 110, and an auxiliary oil pump 500 and a water pump 910 located in the cavity formed by the right cover 920 and the lower housing 110.

[0120] Please refer to the following: Figure 15 , Figure 15 As shown Figure 5 Enlarged schematic diagram of region B in the middle.

[0121] In this embodiment, a second flat square pin 330 is coaxially disposed at one end of the balance shaft 300, and a second flat square hole 912 is correspondingly coaxially disposed at one end of the third drive shaft 911. The second flat square pin 330 is inserted into the second flat square hole 912. In practical applications, when the balance shaft 300 rotates, the second flat square pin 330 provides force to the wall of the second flat square hole 912, thereby driving the third drive shaft 911 to rotate and realizing the power output of the water pump 910.

[0122] As can be seen, in the power transmission system consisting of balance shaft 300, main oil pump 400, auxiliary oil pump 500 and water pump 910, the first drive shaft 410 and the second drive shaft 510 are fixedly connected, and the balance shaft 300 and the third drive shaft 911 are fixedly connected. Only a transmission chain 800 is additionally configured to transmit power between the balance shaft 300 and the second drive shaft 510. Compared with the prior art, the space occupied by the transmission mechanism is greatly reduced, and the structural compactness of the engine 10 is significantly improved.

[0123] Considering that the impeller of the water pump 910 will inevitably undergo axial movement during operation, in order to prevent the water pump 910 from failing under extreme conditions and the third drive shaft 911 from retracting, in this embodiment, a movement gap 913 is formed between one end of the second flat square pin 330 on the balance shaft 300 and one end of the third drive shaft 911 with the second flat square hole 912. The extremely small movement gap 913 can prevent the third drive shaft 911 from retracting under extreme abnormal conditions and being limited by the balance shaft 300, so that the water pump will not fail.

[0124] In summary, the engine 10 provided in this embodiment has a more reasonable structural layout, a shorter oil return path in the oil return chamber 130, and higher oil return efficiency. Furthermore, the oil suction port of the oil suction channel is located at the bottom of the oil supply chamber 140, which can ensure normal oil supply to the main oil circuit under bumpy conditions. The oil suction channel and the oil replenishment channel are formed in the housing structure 100, eliminating the need for additional piping and simplifying the structure. It also allows for easier and faster installation of the oil cooler 930, and provides better cooling effect when the oil cooler 930 is installed. In addition, it reduces the number of parts and integrates the three functions of oil suction, filtration, and oil discharge on the housing structure 100, greatly improving the structural compactness of the engine 10.

[0125] In addition, this embodiment also provides a motorcycle equipped with the aforementioned engine 10. Benefiting from the advantages of the engine 10, the motorcycle provided in this embodiment has the characteristics of more compact structure and higher safety.

[0126] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An engine characterized by, The system includes a housing structure (100) having an oil supply chamber (140) and an oil return chamber (130) that are isolated from each other. The housing structure (100) is provided with a main oil pump mounting part (116) for mounting a main oil pump (400). The main oil pump mounting part (116) has an oil inlet chamber (1161) corresponding to the oil inlet end of the main oil pump (400). The housing structure (100) is provided with an oil suction channel inside. One end of the oil suction channel is connected to the oil inlet chamber (1161), and the other end of the oil suction channel is connected to the oil supply chamber (140). The oil suction channel is used for the main oil pump (400) to pump the oil in the oil supply chamber (140) into the main oil circuit of the engine (10). The housing structure (100) includes a lower housing (110) and an oil pan (120). The oil pan (120) is connected to the lower housing (110) and together they form the oil supply chamber (140) and the oil return chamber (130). The main oil pump mounting part (116) is disposed on the lower housing (110). The lower housing (110) is provided with a portion of the channel that forms the oil suction channel, and the oil pan (120) is provided with the remaining channel that forms the oil suction channel. The lower housing (110) is provided with a fourth channel (117), and the oil pan (120) is provided with a fifth channel. One end of the fourth channel (117) is connected to the oil inlet chamber (1161), and the end of the fourth channel (117) away from the oil inlet chamber (1161) is connected to one end of the fifth channel. The other end of the fifth channel is connected to the oil supply chamber (140). The lower housing (110) includes a top wall (115) and a fifth cylinder (1156) protruding from the inner surface of the top wall (115). The fifth cylinder (1156) is located in the oil return chamber (130) and forms the fourth channel (117). The bottom end of the fifth cylinder (1156) is connected to the oil pan (120).

2. The engine according to claim 1, characterized in that, An installation channel (126) is provided on the outer surface of the oil pan (120), and the installation channel (126) is coaxially connected to the fifth channel; The engine (10) also includes an oil filter (700), which extends into the bottom of the oil supply chamber (140) through the mounting channel (126) and the fifth channel in sequence. The oil filter (700) and the mounting channel (126) are detachably connected.

3. The engine according to claim 2, characterized in that, The outer surface of the oil filter element (700) is fitted with a first seal (710) and a second seal (720). The first seal (710) abuts against the inner sidewall of the fifth channel, and the second seal (720) abuts against the inner sidewall of the installation channel (126).

4. The engine according to claim 2, characterized in that, A limiting protrusion (1256) is provided on the inner surface of the bottom wall (125) of the oil pan (120). The limiting protrusion (1256) is located in the oil supply chamber (140). One end of the oil filter (700) extending into the oil supply chamber (140) cooperates with the limiting protrusion (1256).

5. The engine according to claim 1, characterized in that, The oil pan (120) includes a bottom wall (125) and a sixth cylinder (1253) protruding from the inner surface of the bottom wall (125). The sixth cylinder (1253) is located in the return oil chamber (130). The sixth cylinder (1253) forms a fourth branch channel (1254). A fifth branch channel (1255) is provided in the bottom wall (125). One end of the fourth branch channel (1254) and one end of the fifth branch channel (1255) are connected at an angle to form the fifth channel. The end of the fifth branch channel (1255) away from the fourth branch channel (1254) is connected to the bottom end of the oil supply chamber (140). The top end of the sixth cylinder (1253) is connected to the lower housing (110).

6. The engine according to claim 5, characterized in that, A second partition rib (1211) is also provided on the inner surface of the bottom wall (125) of the oil pan (120). The oil supply chamber (140) and the oil return chamber (130) are respectively located on opposite sides of the second partition rib (1211). The opening of the fifth branch channel (1255) away from the fourth branch channel (1254) is located at the bottom of the side of the oil supply chamber (140) surrounded by the second partition rib (1211).

7. A motorcycle, characterized in that, Includes the engine (10) as described in any one of claims 1-6.

Images