Lubrication system, engine and motorcycle

Abstract

The present application relates to the technical field of motorcycle accessories, and discloses a lubricating system, an engine and a motorcycle, wherein the lubricating system is arranged on the engine and is used for realizing transmission of lubricating oil. The lubricating system comprises an oil pump, an oil filter, an oil passage and a pressure regulating valve, wherein the oil passage is communicated with the oil pump and the oil filter respectively, and the pressure regulating valve is arranged in the oil passage. Compared with the prior art, the setting position of the pressure regulating valve is adjusted, the pressure regulating valve is arranged separately from the oil pump, the structure of the oil pump is simplified, the occupied space of the oil pump is reduced, the oil pump can realize more setting forms in the crankcase, and the miniaturization and light weight of the engine are facilitated; further, the distance between the pressure regulating valve and the oil filter is reduced, the flow path of the lubricating oil from the pressure regulating valve to the oil filter is reduced, the energy loss of the lubricating oil is reduced, the lubricating oil pumped into the oil filter no longer needs a large pressure, and the selection of the pressure regulating valve is more diverse.

Description

Technical Field

[0001] This invention relates to the field of motorcycle parts, and in particular to a lubrication system, an engine, and a motorcycle. Background Technology

[0002] A motorcycle is a two- or three-wheeled vehicle powered by a gasoline engine and steered by handlebars. It is lightweight, agile, and fast, widely used for patrolling, passenger and freight transport, and also as sports equipment. Broadly speaking, motorcycles can be categorized into street bikes, road racing motorcycles, off-road motorcycles, cruisers, and touring motorcycles.

[0003] The lubrication system, as a crucial component of a motorcycle engine, has a significant impact on the normal operation of the motorcycle. Specifically, the lubrication system includes engine oil, an oil pump, and oil passages. Engine oil is drawn from the bottom of the oil pan by the oil pump, then its pressure is reduced and stabilized by the pressure regulating valve. Subsequently, it is transported through the oil passages formed inside the crankcase to the oil filter. After being filtered by the oil filter, it continues to flow through the oil passages to various parts that require lubrication, thereby lubricating all components and ensuring the normal operation of the engine.

[0004] In the prior art, in order to limit and transmit the pressure of engine oil, the pressure regulating valve is usually integrated with the oil pump. In order to ensure the smooth transmission of lubricating oil, a large pressure needs to be applied to the lubricating oil, which requires high structural strength of the pressure regulating valve. This makes it impossible to miniaturize the overall structure of the pressure regulating valve. After being integrated with the oil pump, the overall component volume increases, which in turn leads to an excessively large engine structure and reduces the compactness of the engine, which is not conducive to the miniaturization and weight reduction of the engine. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide a lubrication system that has advantages such as compact structure and excellent oil delivery performance.

[0006] Based on this, the present invention provides a lubrication system, which includes an oil pump, an oil filter, an oil passage, and a pressure regulating valve disposed on a crankcase. The oil passage is connected to the oil pump and the oil filter respectively. The pressure regulating valve is disposed in the oil passage. The oil passage includes a first oil passage near the oil pump and a second oil passage near the oil filter. The pressure regulating valve is disposed at the intersection of the first oil passage and the second oil passage.

[0007] In some embodiments of this application, the oil passage is arranged in an "L" shape, with the first oil passage perpendicular to the second oil passage.

[0008] In some embodiments of this application, a machining hole for drilling the oil passage is drilled at the connection between the first oil passage and the second oil passage, and the pressure regulating valve is located at the connection between the first oil passage and the second oil passage and is used to block the machining hole.

[0009] In some embodiments of this application, the crankcase is provided with a gear pair for driving the oil pump, the gear pair is located outside the crankcase, and the oil pump is located inside the crankcase.

[0010] In some embodiments of this application, the first oil passage, the second oil passage, and the pressure regulating valve are located on the bottom surface of the crankcase.

[0011] In some embodiments of this application, the oil pump is located below and behind the crankshaft, and the angle formed by the line connecting the center of the oil pump and the center of the crankshaft and the perpendicular line to the crankcase mating surface is less than 30°.

[0012] In some embodiments of this application, the oil pump's inlet and outlet are located on both sides of the crankshaft bearing housing bolts.

[0013] In some embodiments of this application, the oil filter is located below the water pump and between the right crankshaft bearing seat and the intermediate crankshaft bearing seat.

[0014] Another object of the present invention is to provide an engine characterized by including the above-described lubrication system.

[0015] Another object of the present invention is to provide a motorcycle, characterized in that it includes the engine described above.

[0016] This invention provides a lubrication system, which has the following advantages compared to the prior art:

[0017] This invention provides a lubrication system for an engine, mounted on the crankcase, for the transfer of engine oil. The lubrication system includes an oil pump, an oil filter, an oil passage, and a pressure regulating valve. The oil passage is connected to both the oil pump and the oil filter, and the pressure regulating valve is located within the oil passage. Based on this structure, this invention creatively adjusts the position of the pressure regulating valve, separating it from the oil pump. This simplifies the structure of the oil pump, reduces its space requirements, and allows for more flexible placement options within the crankcase, contributing to engine miniaturization and weight reduction. Furthermore, the reduced distance between the pressure regulating valve and the oil filter shortens the flow path of the lubricating oil, reducing energy loss. The lubricating oil pumped into the oil filter no longer requires high pressure, and the choice of pressure regulating valve becomes more diverse.

[0018] The present invention also provides an engine having the above-described lubrication system, and therefore also has the advantages of compact structure.

[0019] The present invention also provides a motorcycle that uses the above-mentioned engine, and therefore also has the advantages of compact structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the lubrication system according to an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of the lubrication system according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the engine structure according to an embodiment of the present invention;

[0023] Figure 4 This is a detailed structural diagram of the oil passage in the same cylinder head according to an embodiment of the present invention.

[0024] In the diagram, 1 is the crankcase; 2 is the oil filter; 3 is the oil passage; 31 is the first oil passage; 32 is the second oil passage; 4 is the pressure regulating valve; 5 is the oil passage to the cylinder head; 51 is the third oil passage; 52 is the fourth oil passage; and 6 is the bolt. Detailed Implementation

[0025] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0026] It should be understood that the terms "before," "after," etc., are used in this invention to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, "before" information can also be called "after" information, and "after" information can also be called "before" information, without departing from the scope of this invention.

[0027] like Figures 1 to 2 As shown, this embodiment of the invention provides a lubrication system for an engine, which is mounted on the crankcase 1 for transmitting engine oil. Specifically, the lubrication system includes an oil pump (not shown), an oil filter 2, an oil passage 3, and a pressure regulating valve 4. The oil passage 3 is connected to both the oil pump and the oil filter 2, and the pressure regulating valve 4 is located within the oil passage 3. The oil passage 3 includes a first oil passage 31 near the oil pump and a second oil passage 32 near the oil filter 2. The pressure regulating valve 4 is located at the intersection of the first oil passage 31 and the second oil passage 32.

[0028] Based on the above structure, this invention creatively adjusts the setting position of the pressure regulating valve 4, separating it from the oil pump. This simplifies the structure of the oil pump, reduces its space occupation, and allows for more configuration options within the crankcase 1, which is beneficial for engine miniaturization and weight reduction. Furthermore, by placing the pressure regulating valve 4 at the intersection of oil passages, the cone angle left by drilling the oil passage 3 can be repaired, making the oil passage connection smoother, reducing oil turbulence, ensuring oil pressure and flow rate temperature, and reducing mechanical losses. The pressure regulating valve 4 is far from the oil filter 2, making the pressure stabilizing section (i.e., the second oil passage 32) longer. The overall oil pressure before the oil enters the oil filter 2 is more stable, which helps reduce the damage of oil pressure fluctuations to the paper filter screen of the oil filter 2.

[0029] It should be noted that reducing the flow path of lubricating oil from the oil pump to the pressure regulating valve 4 can effectively reduce the energy loss of lubricating oil. At the same time, the closer the pressure regulating valve 4 is to the oil pump outlet pipe, the less energy the lubricating oil loses. Therefore, in some embodiments of this application, in order to ensure the effectiveness of lubricating oil, the pressure regulating valve 4 is set close to the oil pump.

[0030] Furthermore, in some embodiments of this application, the oil passage 3 is arranged in an "L" shape. Compared with the conventional straight oil passage, the L-shaped oil passage 3 can effectively shorten the distance between the oil pump and the oil filter 2, thereby reducing the space occupied by the engine. Of course, the "L"-shaped oil passage 3 formed by adjusting the position of the oil pump will also cause the oil to impact the corner of the passage during operation, reducing the oil flow rate and affecting the flow of oil. Therefore, in order to solve this technical problem, in some embodiments of this application, the pressure regulating valve 4 is set at the turning point of the "L"-shaped oil passage 3, that is, it is located at the inflection point of the L-shaped oil passage 3. This design can provide a certain buffer for the high-pressure lubricating oil flowing out of the oil pump, reducing the impact of the high-pressure lubricating oil on the corner of the passage. The regulated high-pressure lubricating oil continues to flow to the oil pipeline connected to the oil filter 2 through the pressure regulating valve 4. The setting of the pressure regulating valve 4 can reduce the flow resistance of the lubricating oil and improve the pumping efficiency of the lubrication system.

[0031] It's important to note that when oil passage 3 is not located in front of the oil pump, it doesn't increase the engine's longitudinal length, nor does it lead to an increase in the overall engine size and weight, thus contributing to weight reduction. Therefore, the end face of oil passage 3 should not be higher than the sealing surface of the oil pump. However, this method results in a deeper machining depth, increasing the difficulty of drilling. The passage on the oil pump cover is smaller than the passage on the housing to ensure that the oil pump's function is not affected by avoiding the plug.

[0032] Furthermore, to improve the engine's lightweight and miniaturization, the crankcase 1 is configured as an upper and lower housing. The oil pump, oil passage 3, pressure regulating valve 4, and oil filter 2 in this application are all located on the bottom surface of the crankcase 1. Specifically, the oil pump and oil passage 3 are located inside the crankcase 1, while the pressure regulating valve 4 and oil filter 2 are located outside the crankcase 1 and at its bottom.

[0033] Furthermore, in some embodiments of this application, the oil pump and oil filter 2 are located below the crankshaft, with the oil filter 2 situated between the right bearing housing and the middle bearing housing of the crankshaft.

[0034] Optionally, in some embodiments of this application, the oil pump is located at the rear lower part of the crankshaft, and the angle between the line connecting the midpoint of the oil pump and the midpoint of the crankshaft and the crankcase mating surface is less than 30°. Based on the above structure, the adjustment of the setting position of the oil pump and the crankshaft changes the existing configuration, further improving the structural compactness of the engine. It can also save space for the setting of other structures, which is beneficial to the lightweighting and miniaturization of the engine and the motorcycle as a whole.

[0035] like Figure 3 and Figure 4 As shown, the present invention also provides an engine with an integrated cylinder head and housing, wherein the cylinder head oil passage 5 is connected by an upwardly inclined third oil passage 51 at the housing and an upwardly inclined fourth oil passage 52 at the cylinder block and arranged in an angled manner. The inlet of the third oil passage 51 is arranged at the center hole of the crankshaft bearing seat, and the outlet of the fourth oil passage 52 is arranged at the cylinder block mating surface. The third oil passage 51 and the fourth oil passage 52 are not on the same plane in the axial direction and are connected by a transition oil passage 53. The transition oil passage 53 also serves as the mounting point of the chain tensioner. The bolt 6 used to install the chain tensioner simultaneously seals the third oil passage 51 and the fourth oil passage 52.

[0036] In summary, this invention provides a lubrication system installed on the crankcase of an engine for the transfer of lubricating oil. The lubrication system includes an oil pump, an oil filter, an oil passage, and a pressure regulating valve. The oil passage is connected to both the oil pump and the oil filter, and the pressure regulating valve is located within the oil passage. Compared to existing technologies, this lubrication system adjusts the position of the pressure regulating valve, separating it from the oil pump. This simplifies the oil pump's structure, reduces its space requirements, and allows for more flexible installation options within the crankcase, contributing to engine miniaturization and weight reduction. Furthermore, the reduced distance between the pressure regulating valve and the oil filter shortens the flow path of the lubricating oil, reducing energy loss. The lubricating oil pumped into the oil filter no longer requires high pressure, and the choice of pressure regulating valve becomes more diverse.

[0037] The present invention also provides an engine having the above-described lubrication system, and therefore also has the advantages of compact structure.

[0038] The present invention also provides a motorcycle that uses the above-mentioned engine, and therefore also has the advantages of compact structure.

[0039] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A lubrication system, characterized in that, The system includes an oil pump, an oil filter, an oil passage, and a pressure regulating valve, all mounted on the crankcase. The oil passage is connected to both the oil pump and the oil filter. The pressure regulating valve is located within the oil passage. The oil passage includes a first oil passage near the oil pump and a second oil passage near the oil filter. The pressure regulating valve is located at the intersection of the first and second oil passages. The end face of the oil passage is not higher than the sealing surface of the oil pump; The oil passage is arranged in an "L" shape, with the first oil passage perpendicular to the second oil passage; A machining hole for drilling the oil passage is drilled at the connection between the first oil passage and the second oil passage, and the pressure regulating valve is located at the connection between the first oil passage and the second oil passage and is used to block the machining hole; The crankcase is provided with a gear pair for driving the oil pump. The gear pair is located outside the crankcase, and the oil pump is located inside the crankcase. The oil pump is located at the rear lower part of the crankshaft, and the angle formed by the line connecting the center of the oil pump and the center of the crankshaft and the perpendicular line to the crankcase surface is less than 30°.

2. The lubrication system according to claim 1, characterized in that, The first oil passage, the second oil passage, and the pressure regulating valve are located on the bottom surface of the crankcase.

3. The lubrication system according to claim 1, characterized in that, The oil pump's inlet and outlet are located on both sides of the crankshaft bearing housing bolts.

4. The lubrication system according to claim 1, characterized in that, The oil filter is located below the water pump and between the right crankshaft bearing seat and the middle crankshaft bearing seat.

5. An engine, characterized in that, Includes the lubrication system as described in any one of claims 1-4.

6. A motorcycle, characterized in that, Including the engine as described in claim 5.

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