JP5796460B2 - Engine lubrication structure - Google Patents

Description

  The present invention relates to an engine lubrication structure for supplying oil to an engine, and more particularly to an engine lubrication structure having an oil filter.

  Conventionally, a configuration in which the inside of an engine is lubricated with oil circulated by an oil pump or the like is well known. When the inside of the engine is lubricated with oil in this way, foreign matters such as metal powder are mixed into the oil, and therefore it is necessary to remove the foreign matter from the oil using an oil filter. This oil filter is usually housed in a filter chamber having an oil inlet and an oil outlet, and oil discharged from the engine is introduced into the filter chamber through the oil inlet and is filtered by the oil filter. After being filtered, the oil is led out from the oil outlet to the inside of the engine.

  Various configurations for cooling the oil have been devised. For example, Patent Document 1 discloses a configuration in which a filter case provided with a filter chamber is formed integrally with a pump housing of a cooling water pump. Further, Patent Document 2 discloses a configuration that suppresses overheating of oil by a heat dissipating fin. Furthermore, Patent Document 3 discloses a configuration in which a cooling water passage is formed in an oil filter body constituting a filter chamber.

JP 2002-174125 A Utility Model Registration No. 2587569 Japanese Utility Model Publication No. 2-13704

  However, in the conventional engine lubrication structure, there is no means for flowing the oil in a wide range in the filter chamber, and a part of the oil introduced into the filter chamber stays in the filter chamber and is introduced into the filter chamber. Most of the oil that had been passed through the oil filter without sufficiently flowing through the filter chamber. For this reason, the oil is supplied into the engine without being sufficiently cooled in the filter chamber, and even if an oil cooling structure is provided, it is difficult to sufficiently enhance the oil cooling effect.

  In view of the above circumstances, an object of the present invention is to provide an engine lubrication structure capable of improving the oil cooling performance by allowing oil to flow over a wide range in a filter chamber.

The first invention of the present application includes an oil introduction port for introducing oil discharged from the inside of the engine, an oil filter for filtering oil introduced from the oil introduction port, and oil filtered by the oil filter. An engine lubrication structure having a filter chamber having an oil outlet port leading out to the inside, wherein the filter chamber has a space between the oil inlet port and the oil filter from the oil inlet side. Guide ribs that are divided into a plurality of flow paths toward the oil filter side are provided, and the guide ribs divide the oil so that the oil has directivity in a plurality of directions .

  By adopting such a configuration, it is possible to divert the oil by the guide ribs and to give the oil directivity in a plurality of directions. Along with this, oil can flow over a wide range in the filter chamber, and the oil cooling performance can be improved.

The second invention of the present application includes an oil introduction port for introducing oil discharged from the inside of the engine, an oil filter for filtering the oil introduced from the oil introduction port, and the oil filtered by the oil filter. An engine lubrication structure having a filter chamber having an oil outlet port leading out to the inside, wherein the filter chamber has a space between the oil inlet port and the oil filter from the oil inlet side. the oil filter is divided into a plurality of flow paths toward the side guide rib is provided, the base end portion of the guide rib is characterized that you have provided so as to divide the oil introduction port into a plurality.

  As described above, the oil introduction port is divided into a plurality of portions by the base end portion of the guide rib, so that the oil can be divided when the oil is introduced from the oil introduction port into the filter chamber. Along with this, it is possible to further enhance the effect of oil diversion, and it is possible to cause the oil to flow in a wider range in the filter chamber.

The third invention of the present application includes an oil introduction port for introducing oil discharged from the inside of the engine, an oil filter for filtering the oil introduced from the oil introduction port, and the oil filtered by the oil filter. An engine lubrication structure having a filter chamber having an oil outlet port leading out to the inside, wherein the filter chamber has a space between the oil inlet port and the oil filter from the oil inlet side. Guide ribs that are divided into a plurality of flow paths toward the oil filter side are provided , and the oil filter includes elements arranged to form a radial shape when viewed in the mounting direction of the oil filter. It is along the tangential direction of the circle formed by the outer periphery of the element as viewed in the mounting direction of the oil filter. It characterized that you have arranged.

  By adopting such a configuration, the oil diverted by the guide rib does not flow linearly toward the center of the element but flows into the element while wrapping around the outer periphery of the element. Along with this, foreign substances such as metal powder contained in oil can be captured in a wide area on the outer periphery of the element, and it is possible to prevent foreign substances from concentrating on one place and causing problems such as clogging. It becomes possible to do.

The fourth invention of the present application includes an oil inlet for introducing oil discharged from the engine, an oil filter for filtering the oil introduced from the oil inlet, and the oil filtered by the oil filter. An engine lubrication structure having a filter chamber having an oil outlet port leading out to the inside, wherein the filter chamber has a space between the oil inlet port and the oil filter from the oil inlet side. Guide ribs that are divided into a plurality of flow paths toward the oil filter side are provided, the filter chamber is provided adjacent to a pump chamber provided with a water pump that transfers cooling water to the engine, and the guide ribs are the Rukoto from the partition wall for partitioning the filter chamber and the pump chamber is protruded toward the filter chamber side And butterflies.

  By adopting such a configuration, the partition wall and the guide rib are cooled by the cooling water in the pump chamber, and the oil can be effectively cooled by the guide rib. That is, the heat exchange efficiency between the cooling water in the pump chamber and the oil in the filter chamber can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the lubricating structure of the engine which can flow oil in a filter chamber over a wide range and can improve the cooling performance of oil.

It is a right view which shows the engine which concerns on one Embodiment of this invention. In the engine which concerns on one Embodiment of this invention, it is a right view which shows the principal part of a state which removed the pump cover. In the engine which concerns on one Embodiment of this invention, it is a perspective view which shows the principal part of the state which attached the pump cover. In the engine which concerns on one Embodiment of this invention, it is a right view which shows the principal part of the state which attached the pump cover.

  Hereinafter, an engine 1 according to an embodiment of the present invention will be described with reference to the drawings. Hereinafter, the right side, the left side, the back side, and the near side in FIG. 1 will be described as the front side (front side), the back side (rear side), the left side, and the right side, respectively.

  First, the overall configuration of the engine 1 will be described with reference to FIG. The engine 1 is mounted on, for example, an off-road motorcycle, and is a water-cooled single-cylinder engine. As shown in FIG. 1, the engine 1 includes a left and right split crankcase 2, a cylinder 3 extending substantially upward from the front portion of the crankcase 2, and a cylinder head provided substantially above the cylinder 3. 4 and a head cover 5 that covers the upper surface of the cylinder head 4.

  A crankshaft (not shown) is supported in the left-right direction on the crankcase 2, and this crankshaft is driven by a driven part (for example, an automatic device) via a clutch and a transmission (not shown). It is connected to the rear wheel of a motorcycle. When the engine 1 is driven, the rotation of the crankshaft is transmitted to the driven part via the clutch and the transmission, so that the driven part is rotated. The clutch is housed in the clutch case 6. A clutch cover 7 is attached to the right side surface of the clutch case 6 from the center to the rear.

  A piston (not shown) is accommodated in the cylinder 3 so as to be movable up and down. The piston is connected to the crankshaft via a connecting rod (not shown), and the lifting and lowering movement of the piston is converted into rotation via the connecting rod and transmitted to the crankshaft.

  A throttle body 8 is connected to the rear portion of the cylinder head 4. The throttle body 8 is connected to an intake manifold 10 integrated with an air cleaner box (not shown). The air introduced from the air cleaner box is introduced into a combustion chamber (not shown) provided between the cylinder 3 and the cylinder head 4 via the intake manifold 10 and the throttle body 8. . A fuel injection device (not shown) is attached to the throttle body 8, and fuel is injected at a predetermined timing toward the cylinder head 4 by this fuel injection device. A CDI unit 11 that controls the ignition timing of the engine 1 is provided in front of the throttle body 8.

  An exhaust pipe 12 is connected to the front portion of the cylinder head 4. The exhaust pipe 12 is connected to a muffler (not shown), and exhaust from the cylinder head 4 can be discharged to the rear of the engine 1 through the exhaust pipe 12 and the muffler. A cover 13 is attached to the exhaust pipe 12.

  Next, a configuration for lubricating and cooling the inside of the engine 1 having the above configuration will be described mainly with reference to FIGS. In addition, the white arrow in FIG.2 and FIG.4 has shown the flow of oil. Since FIG. 3 is a perspective view from the upper rear side, the actual vertical relationship and the vertical relationship on the drawing are reversed.

  As shown in FIG. 2, a filter chamber 14 is provided in front of the clutch cover 7 on the right side surface of the clutch case 6, and a pump chamber 15 is adjacent to the filter chamber 14 at the front lower side of the filter chamber 14. Is provided. The periphery of the filter chamber 14 and the pump chamber 15 is surrounded by a peripheral wall 16, and the filter chamber 14 and the pump chamber 15 are partitioned by a partition wall 17.

  First, the filter chamber 14 will be described in detail. The filter chamber 14 is provided with a filter mounting portion 19 having a circular shape in a side view, and an oil filter 18 is mounted on the filter mounting portion 19. In the present embodiment, the mounting direction of the oil filter 18 is a direction from right to left.

  As best shown in FIG. 3, the oil filter 18 includes a cylindrical member 20 provided with a large number of round holes, and an element 21 provided around the cylindrical member 20. An oil outlet 22 (see FIG. 2) is provided at the center of the cylindrical member 20, and the oil outlet 22 communicates with the inside of the engine 1.

  The elements 21 are installed in the depth direction of the filter chamber 14 (left and right direction in the present embodiment), and are configured to radiate in the mounting direction view of the oil filter 18 (in the same view direction as in the side view in the present embodiment). Is arranged. The element 21 is formed by a large number of pleats, and a plurality of slits 48 (see FIG. 3) are provided in the left-right direction for each pleat. Although the slits 48 are provided in all the pleats constituting the element 21, only the slits 48 provided in one pleat are displayed in FIG. 3, and the slits 48 provided in the other pleats are described. It is omitted.

  An oil inlet 24 is provided at the front of the filter chamber 14. The oil introduction port 24 is provided on the upper end side of the oil passage 25 communicating with the inside of the engine 1.

  A guide rib 26 is provided in the depth direction of the filter chamber 14 at the front portion of the filter chamber 14. The guide rib 26 protrudes from the partition wall 17 partitioning the filter chamber 14 and the pump chamber 15 toward the filter chamber 14 side. The guide rib 26 divides the space between the oil introduction port 24 and the oil filter 18 into a pair of upper and lower flow paths (an upper flow path 27 and a lower flow path 28) from the oil introduction port 24 side to the oil filter 18 side. Yes. The base end portion of the guide rib 26 is provided so as to cover a part of the oil introduction port 24 (in this embodiment, the central portion in the vertical direction), and the oil introduction port 24 is vertically divided into two. Hereinafter, when there is no particular distinction between upper and lower, it will be described as “oil introduction port 24”, and when distinction is made between upper and lower, “upper oil introduction port 24a” and “lower oil introduction port 24b”. Describe. Note that the oil introduction port 24a and the oil introduction port 24b are indicated by bold lines in FIG.

  The guide rib 26 extends rearward and upward. As indicated by a two-dot chain line X in FIG. 2, the distal end portion of the guide rib 26 is a circle formed by the outer peripheral portion 23 (the end portion on the side away from the cylindrical member 20) of the element 21 as viewed in the mounting direction of the oil filter 18. (In the present embodiment, the oil filter 18 is curved so as to be along the tangential direction of a circle that overlaps the outline of the filter mounting portion 19 when viewed in the mounting direction).

  In the filter chamber 14, three inner cooling fins 30 are provided below the oil inlet 24 and the guide rib 26. Each inner cooling fin 30 projects from the partition wall 17 to the filter chamber 14 side. Each inner cooling fin 30 extends rearward and upward, and is provided in the depth direction of the filter chamber 14 as with the guide rib 26. Each inner cooling fin 30 is arranged so as to be separated from the element 21 of the oil filter 18 by a certain distance.

  Next, the pump chamber 15 will be described. The upper end of the pump chamber 15 is disposed inside the engine 1 (for example, the cylinder 3 and the cylinder head) via a flow passage 31 provided across the clutch case 6 and the crankcase 2. 4 is connected to a water jacket (not shown) provided inside. A water pump 32 is accommodated in the pump chamber 15. The water pump 32 includes a rotating shaft 33 provided in the left-right direction and penetrating the pump chamber 15, and an impeller 34 attached to the rotating shaft 33. The impeller 34 is provided at a position sandwiching each inner cooling fin 30 with the element 21 of the oil filter 18.

  As best shown in FIG. 4, a pump cover 35 is attached to the right side surface of the clutch case 6 so as to surround the filter chamber 14 and cover the pump chamber 15. The pump cover 35 is fixed to the clutch case 6 and the crankcase 2 by a plurality of bolts 36.

  An opening 37 having a shape corresponding to the filter chamber 14 is provided at the rear portion of the pump cover 35, and a flange portion 38 is provided around the opening 37 on the right side surface of the pump cover 35. An oil filter cover 40 (see FIG. 1) is joined to the flange portion 38 so as to cover the opening portion 37, whereby the right side surface of the filter chamber 14 is closed. The oil filter cover 40 is fixed to the pump cover 35, the clutch case 6, and the crankcase 2 by a plurality of bolts 41 (see FIG. 1).

  Five outer cooling fins 42 protrude from the central portion of the pump cover 35 in the front-rear direction toward the opening 37 side. Each outer cooling fin 42 extends rearward and upward, and is disposed at a position that does not overlap with the guide rib 26 and each inner cooling fin 30 in a side view. The base end portions of the lower three outer cooling fins 42 are connected to each other by ribs 43. Each outer cooling fin 42 is arranged so as to be separated from the element 21 of the oil filter 18 by a certain distance, like the inner cooling fins 30.

  A communication pipe 44 extending substantially in the vertical direction is integrally formed at the front portion of the pump cover 35. A lower end portion of the communication pipe 44 communicates with the inside of the pump chamber 15. As shown in FIG. 1, the upper end of the communication pipe 44 is connected to the lower end of a radiator 46 disposed in front of the engine 1 via left and right inlet hoses 45. The upper end portion of the radiator 46 is connected to a water jacket provided inside the engine 1 via an outlet hose 47.

  In the configuration as described above, when the engine 1 is in operation, the oil discharged from the engine 1 is filtered from the oil passage 25 by the oil pump (not shown) through the upper and lower oil inlets 24a and 24b. To be introduced. At that time, oil is introduced perpendicular to the depth direction of the filter chamber 14.

  As shown in FIGS. 2 and 4, the oil introduced into the filter chamber 14 from the upper oil introduction port 24 a flows to the oil filter 18 side along the upper flow path 27 and flows into the oil filter 18 from above. To do. The oil introduced into the filter chamber 14 from the lower oil introduction port 24b flows while spreading along the lower flow path 28, and flows into the oil filter 18 from the vicinity of the vertical center or from below.

  The oil that has flowed into the oil filter 18 in this way is filtered by the element 21 of the oil filter 18 and then supplied to the inside of the engine 1 from the oil outlet port 22. Then, after the inside of the engine 1 is lubricated, it is returned to the filter chamber 14 again. By repeating such a process, oil circulates.

  Further, when the engine 1 is in operation, the water pump 32 is driven and the impeller 34 rotates around the rotation shaft 33, and accordingly, the cooling water in the radiator 46 communicates between the left and right inlet hoses 45 and the pump cover 35. It flows into the pump chamber 15 through the pipe 44. This cooling water is supplied to the water jacket of the engine 1 through the flow passage 31 to cool the inside of the engine 1. Thereafter, the cooling water returns from the outlet hose 47 to the radiator 46 and is cooled by passing through the radiator 46. By repeating such a process, cooling water circulates.

  As described above, in the present embodiment, the guide rib 26 that divides the space between the oil inlet 24 and the oil filter 18 into the upper flow path 27 and the lower flow path 28 from the oil inlet 24 side toward the oil filter 18 side. The guide rib 26 divides the oil, and the oil can have directivity in a plurality of directions. Along with this, it becomes possible to cause the oil to flow over a wide range in the filter chamber 14. For example, compared with the case where the oil introduction port 24 is arranged directly below the oil filter 18 without the guide rib 26, The exchange efficiency can be improved.

  Further, since the oil introduction port 24 is vertically divided into two by the base end portion of the guide rib 26, it becomes possible to divert the oil when oil is introduced into the filter chamber 14 from the oil introduction port 24. . Along with this, it becomes possible to further enhance the oil diversion effect.

  Further, since the tip end portion of the guide rib 26 is curved along the tangential direction of the circle formed by the outer peripheral portion 23 of the element 21 as viewed in the mounting direction of the oil filter 18, the oil diverted by the guide rib 26 Instead of flowing linearly toward the center of 21, it flows into element 21 while wrapping around outer peripheral portion 23 of element 21. Along with this, foreign substances such as metal powder contained in the oil can be captured in a wide range of the outer peripheral portion 23 of the element 21, and the foreign substances are concentrated in one place and problems such as clogging occur. Can be suppressed. In particular, in the present embodiment, since both side surfaces 29 (see FIG. 2) of the guide rib 26 are curved along the tangential direction of the outer peripheral portion 23 of the element 21, the above effect can be further increased.

  Furthermore, since the guide rib 26 is provided in the partition wall 17 of the filter chamber 14 and the pump chamber 15, the partition wall 17 and the guide rib 26 are cooled by the cooling water flowing into the pump chamber 15 immediately after being cooled by the radiator 46. As a result, the oil can be effectively cooled by the guide rib 26. That is, the heat exchange efficiency between the cooling water in the pump chamber 15 and the oil in the filter chamber 14 can be improved.

  Further, by arranging the filter chamber 14 and the pump chamber 15 adjacent to each other, it becomes possible to make the flow path of the cooling water and the flow path of the oil as close as possible in the layout, and the heat exchange efficiency between the cooling water and the oil can be improved. It becomes possible to improve.

  Further, since each inner cooling fin 30 is provided in the partition wall 17 of the filter chamber 14 and the pump chamber 15, each inner cooling fin 30 is caused by the cooling water flowing into the pump chamber 15 immediately after being cooled by the radiator 46. It will be cooled efficiently. Accordingly, the heat exchange performance with the oil of each inner cooling fin 30 can be enhanced, and the oil in the filter chamber 14 can be cooled more effectively.

  Further, by providing the inner cooling fins 30 on the partition wall 17 in this way, the inner cooling fins 30 are arranged at positions close to the impeller 34 for circulating the cooling water, and accordingly, the inner cooling fins 30 are arranged. The fin 30 is not easily affected by the heat of the engine 1. Therefore, the oil cooling effect by each inner cooling fin 30 can be further enhanced. Further, since the peripheral wall 16 of the filter chamber 14 is disposed so as to cover the inner cooling fins 30, it is possible to further improve the heat exchange efficiency between the cooling water and the oil.

  Further, since each inner cooling fin 30 and each outer cooling fin 42 are arranged so as to be separated from the element 21 of the oil filter 18 by a certain distance, the oil flow is caused by each inner cooling fin 30 and each outer cooling fin 42. The oil flows smoothly along the outer peripheral portion 23 of the element 21 without being hindered. Therefore, the oil can be uniformly introduced into the element 21 from a wide range of the outer peripheral portion 23 of the element 21, the clogging due to the element 21 locally sucking the oil is prevented, and the life of the element 21 is extended. To contribute.

  Further, since the lower oil inlet 24b is disposed in the vicinity of the inner cooling fin 30 and the outer cooling fin 42, a part of the oil introduced from the lower oil inlet 24b is forcibly After contacting the fins 30 and 42, the fins 30 and 42 are moved to the oil filter 18. Along with this, it is possible to further increase the heat exchange efficiency as compared with the prior art.

  Further, by arranging the respective outer cooling fins 42 on the pump cover 35 that covers the pump chamber 15 into which the cooling water from the radiator 46 flows, the cooling water from the radiator 46 is effectively used for cooling the oil in the filter chamber 14. It becomes possible.

  Further, in the so-called cartridge type oil filter 18 in which the entire filter case is exchanged, the oil usually flows in from the depth direction of the filter chamber 14, so that the oil passes through the outer peripheral portion 23 of the element 21 while spreading, and the metal powder There is little possibility that foreign matters such as the above will concentrate on a part of the element 21. On the other hand, in the configuration in which the inflow direction of oil is perpendicular to the depth direction of the filter chamber 14 as in the present embodiment, foreign matter is intensively captured at the portion where the oil flow hits, and problems such as clogging occur. There is a risk of occurrence. Therefore, it is desirable to disperse oil over a wide area using the configuration of the present invention.

  In the present embodiment, the case where the oil introduction port 24 is vertically divided into two by one guide rib 26 has been described. However, in another different embodiment, the oil introduction port 24 is divided into three or more by a plurality of guide ribs 26. May be.

  In another different embodiment, an oil pump (not shown) for circulating oil and a water pump 32 are arranged on the same axis, and the oil pump and the oil are cooled via a shaft cooled by cooling water. It may be configured. In this case, the oil cooling performance can be further enhanced.

  In the present embodiment, the case where the configuration of the present invention is applied to the single cylinder type engine 1 has been described. However, in other different embodiments, other different types such as a V type, a parallel two cylinder type, a parallel four cylinder type, and the like. The configuration of the present invention may be applied to the engine 1. In the present embodiment, the case where the configuration of the present invention is applied to the engine 1 of an off-road type motorcycle has been described. However, in other different embodiments, other different types of motorcycles such as an on-road type and a scooter type are described. The configuration of the present invention may be applied to the engine 1. The configuration of the present invention can also be applied to an engine 1 such as an ATV (roughly traveling vehicle), an automobile (four-wheeled vehicle), a snow vehicle, or an outboard motor.

DESCRIPTION OF SYMBOLS 1 Engine 14 Filter chamber 15 Pump chamber 17 Bulkhead 18 Oil filter 22 Oil outlet 23 Outer part 24 Oil inlet 26 Guide rib 27 Upper flow path 28 Lower flow path 32 Water pump

Claims (4)

Oil introduction port for introducing oil discharged from the inside of the engine, an oil filter for filtering the oil introduced from the oil introduction port, and oil for deriving the oil filtered by the oil filter to the inside of the engine An engine lubrication structure including a filter chamber having a lead-out port,
The filter chamber is provided with a guide rib that divides a space between the oil inlet and the oil filter into a plurality of flow paths from the oil inlet side toward the oil filter side, and the guide rib separates oil. The engine lubrication structure is characterized in that the oil has directivity in multiple directions . Oil introduction port for introducing oil discharged from the inside of the engine, an oil filter for filtering the oil introduced from the oil introduction port, and oil for deriving the oil filtered by the oil filter to the inside of the engine An engine lubrication structure including a filter chamber having a lead-out port,
The filter chamber is provided with guide ribs that divide a space between the oil inlet and the oil filter into a plurality of flow paths from the oil inlet side toward the oil filter side,
The proximal end of the guide rib, the lubricating structure of the feature and to Rue engine that is provided so as to divide the oil introduction port into a plurality. Oil introduction port for introducing oil discharged from the inside of the engine, an oil filter for filtering the oil introduced from the oil introduction port, and oil for deriving the oil filtered by the oil filter to the inside of the engine An engine lubrication structure including a filter chamber having a lead-out port,
The filter chamber is provided with guide ribs that divide a space between the oil inlet and the oil filter into a plurality of flow paths from the oil inlet side toward the oil filter side,
The oil filter includes an element arranged to form a radial shape when viewed in the mounting direction of the oil filter,
Tip of the guide rib, the lubricating structure of the feature and to Rue engine to the outer peripheral portion of the element in the mounting direction as viewed in the oil filter are arranged along the tangential direction of a circle formed. Oil introduction port for introducing oil discharged from the inside of the engine, an oil filter for filtering the oil introduced from the oil introduction port, and oil for deriving the oil filtered by the oil filter to the inside of the engine An engine lubrication structure including a filter chamber having a lead-out port,
The filter chamber is provided with guide ribs that divide a space between the oil inlet and the oil filter into a plurality of flow paths from the oil inlet side toward the oil filter side,
The filter chamber is provided adjacent to a pump chamber having a water pump for transferring cooling water to the engine,
The guide rib, the lubricating structure of the feature and to Rue engine that the partition wall for partitioning the pump chamber and the filter chamber are protruded toward the filter chamber side.