Oil duct lubricating system of horizontal double-cylinder engine

Abstract

The utility model discloses an oil duct lubrication system of a horizontal double-cylinder engine, which comprises a crankshaft box body, an oil pump, a coarse filter, a fine filter and an oil cooler, the oil pump is assembled in the crankshaft box body, and the oil cooler is arranged on a motorcycle frame outside the crankshaft box body and is provided with an oil inlet pipeline and an oil outlet pipeline; an oil collecting cavity is formed in the bottom of the crankcase body, the fine filter and the coarse filter are both arranged on the lower end face of the crankcase body, and the coarse filter is communicated with the oil collecting cavity. The coarse filter is communicated with an oil inlet pipe of the oil pump through a first oil guide channel arranged in the crankcase body, the oil pump is communicated with an oil inlet pipeline of the oil cooler through an oil passing channel arranged in the crankcase body, and an oil outlet pipeline of the oil cooler is communicated with the fine filter through a second oil guide channel arranged on the crankcase body; and the inner end of the fine filter is arranged in the crankcase body, and the end part of the fine filter is communicated with a main oil duct in the crankcase body.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle engines, specifically to an oil passage lubrication system for a horizontal twin-cylinder engine. Background Technology

[0002] Conventional motorcycle engines store lubricating oil for both lubrication and cooling systems within the crankcase. An oil pump in the crankcase pumps the oil through the main oil passages and then to various branch oil passages, ultimately delivering the lubricating oil to all transmission components within the engine to achieve lubrication. During operation, the high temperature inside the engine causes the lubricating oil temperature to gradually rise, affecting lubrication effectiveness. Therefore, existing engine oil-cooling lubrication systems pump the high-temperature lubricating oil from the engine to an oil cooler before returning it to the crankcase inlet, achieving oil-cooled lubrication. For example, a motorcycle and V-twin engine lubrication system disclosed in application number 2017104763104 includes a main oil pump, a first coarse filter, an oil filter (equivalent to a fine filter), an auxiliary oil pump, and an oil cooler; the oil tank, the first coarse filter, the main oil pump, the oil filter, and the auxiliary oil pump are arranged sequentially along the oil flow direction. This solution effectively cools the engine oil circulating in the engine after startup by installing an oil cooler. The coolant carries away excess heat from the oil, maintaining its temperature within a suitable range and preventing problems such as excessively high oil temperature leading to low oil viscosity and reduced oil film capacity. However, this engine lubrication system is used in large-displacement engines. The oil cooler is located on the engine itself, making piping layout inconvenient. Furthermore, the pre-filter and fine filter are installed inside the engine, with their fastening nuts located on the left and right sides respectively, making installation and removal quite difficult. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide an oil passage lubrication system for a horizontal twin-cylinder engine, which solves the problems of the coarse filter and fine filter being installed in different positions on the engine in the existing lubrication system, which is inconvenient to install and disassemble, and the oil cooler being located inside the engine, which increases the engine size.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An oil lubrication system for a horizontal twin-cylinder engine includes a crankcase, an oil pump, a coarse filter, a fine filter, and an oil cooler. The oil pump is mounted inside the crankcase, and the oil cooler is mounted on a motorcycle frame outside the crankcase, and has an inlet and an outlet oil line. The bottom of the crankcase has an oil collection chamber. The fine filter and the coarse filter are both located on the lower end face of the crankcase, and the coarse filter is connected to the oil collection chamber. The coarse filter is connected to the inlet oil line of the oil pump through a first oil guide channel located inside the crankcase. The oil pump and the inlet oil line of the oil cooler are connected through an oil passage located inside the crankcase. The outlet oil line of the oil cooler is connected to the fine filter through a second oil guide channel located on the crankcase. The inner end of the fine filter is located inside the crankcase, and its end is connected to the main oil passage inside the crankcase. In this way, the high-temperature lubricating oil collected in the oil collecting chamber after lubricating various components in the crankcase is initially filtered by the coarse filter, then pumped by the oil pump to the oil cooler outside the crankcase. After being cooled by the oil cooler, the oil is led out from the oil cooler's outlet pipe to the second oil guide channel of the crankcase, and finally enters the fine filter for further filtration. The filtered and cooled lubricating oil is then delivered through the main oil passage on the crankcase to the various oil passages in the engine compartment, lubricating the various transmission components within the crankcase. The coarse and fine filters are installed on the lower end face of the crankcase, on the same side, making installation and removal convenient and eliminating the need to stand on separate sides for installation or removal. The oil cooler is located outside the crankcase, on the motorcycle frame, and does not occupy engine space.

[0006] Furthermore, the coarse filter is installed at a lower height than the fine filter. This lower installation position shortens the path between the oil collection chamber and the coarse filter.

[0007] Furthermore, the crankcase includes a left crankcase and a right crankcase. The oil pump is installed on the outside of the left crankcase. Two chambers for assembling a coarse filter and a fine filter are spaced apart at the bottom of the left crankcase. The first oil guide channel is located within the left crankcase. The oil passage consists of a left oil passage within the left crankcase and a right oil passage within the right crankcase, and the left and right oil passages are interconnected. This allows both the coarse and fine filters to be installed on the left crankcase, facilitating machining, while the chambers on the left crankcase facilitate the installation of the coarse and fine filters. The left and right oil passages of the oil passage span the left and right crankcases, thus connecting to the oil inlet pipe located on one side of the right crankcase, introducing high-temperature lubricating oil to the oil cooler. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the assembly structure of the oil cooler, crankcase, and fine filter in the embodiment;

[0009] Figure 2This is a three-dimensional structural diagram of the crankcase and oil cooler assembled in the embodiment.

[0010] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model 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 this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0012] It should be noted that similar reference numerals 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. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the terms "horizontal," "vertical," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0013] like Figures 1-3 As shown, the oil lubrication system for a horizontal twin-cylinder engine provided in this embodiment includes a crankcase 1, an oil pump 3, a coarse filter 2, a fine filter 5, and an oil cooler 4. The oil pump 3 is installed inside the crankcase 1, and the oil cooler 4 is placed on the motorcycle frame outside the crankcase 1, and is provided with an oil inlet pipe 41 and an oil outlet pipe 42. The bottom of the crankcase 1 has an oil collecting chamber, and the fine filter 5 and the coarse filter 2 are both located on the lower end face of the crankcase. 2 is connected to the oil collection chamber; the coarse filter 2 is connected to the oil inlet pipe of the oil pump 3 through the first oil guide channel provided in the crankcase 1, the oil pump 3 is connected to the oil inlet pipe 41 of the oil cooler 4 through the oil passage 13 provided in the crankcase, and the oil outlet pipe 42 of the oil cooler 4 is connected to the fine filter 5 through the second oil guide channel 14 provided on the crankcase 1; the inner end of the fine filter 5 is placed in the crankcase 1, and the end is connected to the main oil passage in the crankcase 1. In this way, the high-temperature lubricating oil collected in the oil collecting chamber after lubricating various components inside the crankcase 1 is initially filtered by the coarse filter and then pumped by the oil pump 3 to the oil cooler 4 outside the crankcase 1. After being cooled by the oil cooler 4, the oil is led out from the oil outlet pipe 42 of the oil cooler 4 to the second oil guide channel 14 of the crankcase 1, and finally enters the fine filter 5 for further filtration. Finally, the finely filtered and cooled lubricating oil is delivered to the various oil passages in the engine compartment through the main oil passage on the crankcase 1 to lubricate the various transmission components inside the crankcase 1. The coarse filter and the fine filter 5 are installed on the lower end face of the crankcase 1, located on the same side, making installation and removal convenient without needing to stand on both sides for installation or removal. The oil cooler 4 is located outside the crankcase 1, on the motorcycle frame, and does not occupy engine space.

[0014] Furthermore, the coarse filter 2 is installed at a lower height than the fine filter 5. This lower installation position of the coarse filter 2 shortens the path between the oil collecting chamber and the coarse filter 2.

[0015] Furthermore, the crankcase 1 includes a left case 11 and a right case 12. The oil pump 3 is installed on the outside of the left case 11. Two chambers for assembling the coarse filter 2 and the fine filter 5 are spaced apart at the bottom of the left case 11. The first oil guide channel is located inside the left case 11. The oil passage 13 consists of a left oil passage located in the left case 11 and a right oil passage located in the right case 12, and the left and right oil passages are connected. In this way, both the coarse filter 2 and the fine filter 5 are installed on the left case 11, which is convenient for machining, and the chambers provided on the left case 11 facilitate the installation of the coarse filter 2 and the fine filter 5. The left and right oil passages of the oil passage 13 span the left case 11 and the right case 12, thereby connecting with the oil inlet pipe 41 located on one side of the right case 12, introducing high-temperature lubricating oil into the oil cooler 4.

[0016] Specifically, in this embodiment, the main oil passage flows around the crankcase sidewall toward the cylinder block, and then is guided to the cylinder block and cylinder head to provide oil cooling for the cylinder block and cylinder head. It also works with the oil passages provided on the cylinder block and cylinder head to provide oil cooling and lubrication for the various transmission components assembled inside the cylinder block and cylinder head.

[0017] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. An oil passage lubrication system for a horizontal twin-cylinder engine, comprising a crankcase, an oil pump, a coarse filter, a fine filter, and an oil cooler, characterized in that, The system includes a crankcase, an oil pump, a coarse filter, a fine filter, and an oil cooler. The oil pump is mounted inside the crankcase, and the oil cooler is located on the motorcycle frame outside the crankcase, and has an inlet and an outlet oil line. The bottom of the crankcase has an oil collection chamber. Both the fine filter and the coarse filter are located on the lower end face of the crankcase, and the coarse filter is connected to the oil collection chamber. The coarse filter is connected to the oil pump's inlet line through a first oil guide channel located inside the crankcase. The oil pump's inlet line is connected to the oil cooler's inlet line through an oil passage located inside the crankcase. The oil cooler's outlet line is connected to the fine filter through a second oil guide channel located on the crankcase. The inner end of the fine filter is located inside the crankcase, and its end is connected to the main oil passage inside the crankcase.

2. The oil passage lubrication system for a horizontal twin-cylinder engine according to claim 1, characterized in that, The coarse filter is installed at a lower height than the fine filter.

3. The oil passage lubrication system for a horizontal twin-cylinder engine according to claim 1 or 2, characterized in that, The crankcase includes a left case and a right case. The oil pump is installed on the outside of the left case. Two chambers for assembling a coarse filter and a fine filter are provided at intervals at the bottom of the left case. The first oil guide channel is located in the left case. The oil passage consists of a left oil passage located in the left case and a right oil passage located in the right case, and the left oil passage and the right oil passage are connected.

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