JP2011208543A - Oil filtering device and oil pan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil filtration device capable of realizing further energy saving by accelerating temperature elevation of oil supplied to an engine at a cold start of the engine and thereby reducing warming up time.SOLUTION: The oil filtration device 20 includes: an oil receiving part 21 that receives, from below, return oil which is returned after circulating in the engine; an oil circulation pipe 22 into which the oil received by the oil receiving part 21 is introduced; and a filter 23 that is disposed in the oil circulation pipe 22 and filters oil circulating in the oil circulation pipe 22. An oil suction pipe 60 that sucks oil into the oil circulation pipe 22 is disposed on an upstream side of the filter 23 of the oil circulation pipe 22. The oil suction pipe 60 is disposed lower than an oil level of an oil pan body. A downstream of the oil circulation pipe 22 is connected to an oil suction portion of the engine.

Description

  The present invention relates to an oil filtration device provided in a power unit configured to circulate oil and an oil pan provided with the oil filtration device.

  2. Description of the Related Art Conventionally, oil is circulated in a power device such as an automobile engine. Oil is stored in an oil pan provided at the lower part of the engine. The oil stored in the oil pan is sucked up by the operation of the oil pump, filtered by the oil filtering device, and then supplied to each part of the engine (see, for example, Patent Document 1).

  The oil pan of Patent Document 1 includes a concave oil pan body and an oil pan separator disposed inside the oil pan body. The oil pan separator is a member for partitioning the internal space of the oil pan main body into a first chamber in which the oil filtration device is disposed and a second chamber surrounding the first chamber. The oil that circulates through the engine and returns to the oil pan (return oil) flows into the first chamber.

  When the temperature of the oil is low, such as during cold start, the oil in the first chamber is filtered by the oil filtering device and then supplied to each part of the engine. The circulated and warmed oil returns to the first chamber, and the warmed oil is again sucked into the oil filtration device and supplied to each part of the engine. Therefore, the engine can be warmed up faster than an oil pan without an oil pan separator.

JP 2006-189002 A

  However, in the oil pan of Patent Document 1, the return oil flows into the first chamber and is temporarily stored in the first chamber, and then sucked into the oil filtration device, filtered, and supplied to each part of the engine. The volume of the first chamber is larger than the internal volume of the oil filtration device, and the temperature of the return oil flowing into the first chamber is lowered by mixing with the low-temperature oil stored in the first chamber. In addition, the total amount of oil that has flowed into the first chamber is not immediately sucked into the oil filter, but only part of it is sucked in, so other return oils cool down to the temperature before being sucked into the oil filter. Decreases.

  That is, in the oil pan of Patent Document 1, it is difficult to say that the low-viscosity oil whose temperature has been raised can be supplied to the engine at an early stage, and the warm-up time is not sufficiently shortened, which is insufficient from the viewpoint of energy saving. There is.

  The present invention has been made in view of such points, and the object of the present invention is to shorten the warm-up time by increasing the temperature of the oil supplied to the power unit at the time of cold starting of the power unit, The purpose is to realize further energy saving.

  In order to achieve the above object, in the present invention, after the return oil is received by the oil filtration device, it is directly flowed into the oil circulation pipe portion of the oil filtration device, filtered through the filter in the oil circulation pipe portion, and then supplied to the power unit. I tried to supply.

  1st invention is invention of an oil filtration apparatus, It is arrange | positioned in the oil pan main body in which the oil which circulates through a power unit is stored, The oil stored in this oil pan main body is filtered, and it is in said power unit. In an oil filtering device configured to supply, an oil receiving portion for receiving return oil that has returned through circulation through a power device from below, and an oil distribution pipe portion into which oil received by the oil receiving portion is introduced And a filter that is disposed inside the oil circulation pipe part and filters oil flowing through the oil circulation pipe part, and the oil circulation pipe is disposed upstream of the filter of the oil circulation pipe part. An oil suction portion for causing the portion to suck oil is provided below the oil surface of the oil stored in the oil pan body, and the downstream portion of the oil circulation pipe portion is the power unit. It is characterized in being connected to the suction portion of the oil with.

  According to this configuration, the return oil is received by the oil receiving portion, and the return oil received by the oil receiving portion flows through the oil circulation pipe portion and is filtered by the filter, and then supplied to the power unit. Therefore, at the time of cold start, the low-temperature oil stored in the oil pan main body and the return oil that has been heated through circulation through the power unit are less likely to be mixed. As a result, the return oil in which the temperature drop is suppressed is directly supplied to the power unit by the oil circulation pipe part. As a result, it is possible to supply the heated low-viscosity oil to the power device at an early stage, and the warm-up time of the power device is shortened.

  When the temperature of the oil in the oil pan body is low, the viscosity of the oil is high, so the amount of oil sucked from the oil suction section of the oil circulation pipe section is reduced, while the temperature of the oil in the oil pan body is high. In this case, the viscosity of the oil becomes low, and the amount of oil sucked from the oil suction portion of the oil circulation pipe portion becomes larger than when the temperature is low.

  According to a second aspect, in the first aspect, the oil suction part has an opening having an area smaller than a cross-sectional area on the upstream side of the oil circulation pipe part.

  According to this configuration, when the amount of oil required by the power unit is large, the negative pressure in the oil circulation pipe part increases, so that the oil stored in the oil pan body is sucked into the oil circulation pipe part from the oil suction part. And supplied to the power unit. Therefore, poor lubrication of the power unit is less likely to occur.

  On the other hand, when the amount of oil required by the power unit is small, the negative pressure in the oil circulation pipe portion is low. At this time, if the oil stored in the oil pan main body is low temperature and high in viscosity, the area of the opening of the oil suction section is smaller than the cross-sectional area of the oil circulation pipe section. Is less likely to be sucked into the oil distribution pipe, and the warm-up time of the power unit can be shortened.

  According to a third invention, in the first invention, the oil circulation pipe portion is configured by combining the first member and the second member, and the oil suction portion is interposed between the first member and the second member. The gap is formed, and the area of the gap is smaller than the cross-sectional area on the upstream side of the oil circulation pipe part.

  According to this configuration, when the amount of oil required by the power unit is large, the oil stored in the oil pan body is sucked into the oil circulation pipe part through the gap between the first member and the second member, and the power unit Therefore, poor lubrication is less likely to occur.

  On the other hand, when the amount of oil required by the power unit is small, the area of the gap between the first member and the second member is smaller than the cross-sectional area of the oil circulation pipe part. When the viscosity is high at a low temperature, it becomes difficult for the low-temperature oil to be sucked into the oil circulation pipe section, and the warm-up time of the power unit can be shortened.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the oil receiving portion includes a first communication portion that communicates with an upstream end of the oil circulation pipe portion, and an oil pan that passes through the oil receiving portion. A second communicating portion communicating with a space below the oil receiving portion in the main body is formed, and at least opening / closing means for opening / closing the second communicating portion is provided, and the opening / closing means has a predetermined oil temperature state. The second communication portion is configured to open when the temperature is higher than the temperature.

  According to this configuration, when the warming-up of the power plant is finished and the return oil becomes high temperature, the second communication portion is opened by the opening / closing means, so that the high-temperature return oil flows from the oil receiving portion to the bottom of the oil pan body. Flows into the side space. Thereby, since the low temperature oil stored in the oil pan body and the high temperature return oil are mixed, the temperature of the return oil is prevented from excessively rising.

  In a fifth aspect based on the fourth aspect, the opening / closing means includes a valve member that opens and closes the first communication portion and the second communication portion, and a drive device that drives the valve member. When the temperature state of the oil is below a predetermined temperature, the valve member is operated to open the first communication portion and close the second communication portion. The valve member is operated so as to close the first communication part and open the second communication part.

  According to this configuration, since the first communication portion is opened and the second communication portion is closed when the temperature of the oil is low, such as during a cold start, most of the return oil is placed under the oil pan body. Instead of flowing into the space, it flows into the oil circulation pipe part. Therefore, the warm-up time is shortened.

  On the other hand, since the first communication portion is closed and the second communication portion is opened when the temperature of the oil is high, such as after the warm-up, most of the return oil flows into the lower space of the oil pan body. It will be. Therefore, it is suppressed that the temperature of return oil rises too much.

  In a sixth aspect based on the fourth aspect, the opening / closing means includes a first valve member that opens and closes the first communication portion, a second valve member that opens and closes the second communication portion, and the first and second valve members. And a drive device that drives the first valve member to open the first communication portion and the second communication portion when the oil temperature is lower than a predetermined temperature. The second valve member is operated so as to be closed. On the other hand, when the temperature state of the oil is equal to or higher than a predetermined temperature, the first valve member is operated so as to close the first communication portion, and the second communication portion is The second valve member is operated so as to open.

  According to this configuration, when the oil temperature is low, the first communication part is opened and the second communication part is closed, so that most of the return oil does not flow into the lower space of the oil pan body, It will flow into the oil distribution pipe. On the other hand, when the temperature of the oil is high, the first communication part is closed and the second communication part is opened, so that most of the high-temperature return oil flows into the lower space of the oil pan body.

  And since the 1st and 2nd communicating part can be opened and closed independently by the 1st and 2nd valve member at arbitrary timings, it becomes possible to perform temperature control of oil finely.

  According to a seventh aspect, in the fourth aspect, the opening / closing means includes a valve member in which a first valve body that opens and closes the first communication portion and a second valve body that opens and closes the second communication portion are integrally formed, and the valve A drive device for driving the member, wherein the drive device opens the first communication portion by the first valve body when the temperature state of the oil is lower than a predetermined temperature, and the second While the valve body is operated to close the second communication portion, when the temperature state of the oil is equal to or higher than a predetermined temperature, the valve member is closed by the first valve body, and the first communication portion is closed. The second valve body is operated so as to open the second communication part.

  According to this configuration, as in the fifth aspect of the invention, when the oil temperature is low, the first communicating portion is opened and the second communicating portion is closed. Instead of flowing into the space, it flows into the oil circulation pipe part. On the other hand, when the temperature of the oil is high, the first communication part is closed and the second communication part is opened, so that most of the high-temperature return oil flows into the lower space of the oil pan body.

  And since the 1st and 2nd communicating part can be opened and closed by an integral valve member, there are few parts and a structure becomes simple.

  An eighth invention is an invention of an oil pan, wherein the oil pan main body in which oil circulating through the power unit is stored, and the oil pan main body disposed in the oil pan main body, the oil stored in the oil pan main body is filtered. An oil pan comprising an oil filtration device configured to supply to the power device, wherein the oil filtration device includes an oil receiving portion for receiving return oil that circulates and returns from the power device from below. An oil circulation pipe part into which the oil received by the oil receiving part is introduced, and a filter disposed inside the oil circulation pipe part for filtering the oil flowing through the oil circulation pipe part, On the upstream side of the filter of the oil circulation pipe part, an oil suction part for sucking oil into the oil circulation pipe part is provided from the oil level of the oil stored in the oil pan body. Provided below, the downstream portion of the oil circulation pipe unit is characterized in being connected to the suction portion of the oil which the power unit has.

  According to the first invention, the return oil received by the oil receiving portion is caused to flow to the oil circulation pipe portion, and is filtered by a filter disposed inside the oil circulation pipe portion so as to be supplied to the power unit. The heated return oil can be directly supplied to the power unit. Thereby, the warm-up time of the power unit can be shortened, and energy saving can be realized.

  According to the second aspect of the invention, since the oil suction portion having the opening having an area smaller than the cross-sectional area of the oil circulation pipe portion is provided on the upstream side of the filter in the oil circulation pipe portion, a large amount of oil is required. In this case, it is possible to reduce the warm-up time when the required amount of oil is small, while preventing the lubrication failure, and to achieve both trouble prevention and energy saving of the power plant.

  According to the third aspect of the invention, since the gap having an area smaller than the cross-sectional area of the oil circulation pipe part is provided on the upstream side of the filter in the oil circulation pipe part, the trouble of the power plant is caused as in the second invention. Both prevention and energy saving can be achieved.

  According to the fourth aspect of the invention, the oil receiving portion is formed with the first communicating portion communicating with the upstream end of the oil circulation pipe portion and the second communicating portion communicating with the lower space in the oil pan. Since the second communication portion is opened when the temperature is equal to or higher than the predetermined temperature, it is possible to suppress the temperature of the return oil from rising excessively and to extend the life of the oil.

  According to the fifth aspect of the present invention, the first communication portion communicating with the upstream end of the oil circulation pipe portion, the second communication portion communicating with the lower space in the oil pan, and the valve member are opened and closed. The oil flow can be reliably controlled at the cold start and at the end of warm-up. Therefore, it is possible to extend the life of the oil while shortening the warm-up time.

  According to the sixth aspect of the present invention, the first and second valve members independently connect the first communication portion communicating with the upstream end of the oil circulation pipe portion and the second communication portion communicating with the lower space in the oil pan. Since it opens and closes, it is possible to finely control the temperature of the oil, and it is possible to achieve both a reduction in warm-up time and a long life of the oil at a high level.

  According to the seventh invention, the first communication part communicating with the upstream end of the oil circulation pipe part and the second communication part communicating with the lower space in the oil pan are opened and closed by the integral valve member. A simple structure with a small number of parts can be achieved. Thereby, the assembly work can be easily performed, and the cost can be reduced.

  According to the eighth invention, similarly to the first invention, it is possible to shorten the warm-up time of the power plant by increasing the temperature rise of the oil, thereby realizing energy saving.

It is the perspective view which looked at the oil pan concerning the embodiment of the present invention from the upper part. It is a top view of an oil filtration apparatus. It is the figure which looked at the oil filtration apparatus from the vehicle rear side. It is a left view of an oil filtration apparatus. It is a right view of an oil filtration apparatus. It is sectional drawing in the VI-VI line of FIG. It is sectional drawing in the VII-VII line of FIG. It is the elements on larger scale which looked at the part which cut | disconnected the oil distribution pipe part vicinity at the up-down direction from diagonally upward. It is a top view of the lower side member in the state where a filter was installed. It is a top view of a lower member. It is a right view of a lower member. It is a fragmentary sectional view in the XII-XII line of FIG. 7 which shows the state before joining an upper member and a lower member. FIG. 13 is a view corresponding to FIG. 12 and showing a state after the upper member and the lower member are joined. FIG. 9 is a view corresponding to FIG. 8 when the valve member is in a normal operation posture. FIG. 8 is a diagram corresponding to FIG. 7 according to the second embodiment. FIG. 9 is a diagram corresponding to FIG. 7 according to a first modification of the second embodiment. FIG. 9 is a diagram corresponding to FIG. 7 according to a second modification of the second embodiment. It is the perspective view which looked at the cylinder part from the downward direction. FIG. 9 is a diagram corresponding to FIG. 7 according to Modification 3 of Embodiment 2. FIG. 8 is a diagram corresponding to FIG. 7 according to the third embodiment. It is a perspective view of the valve member of Embodiment 3. FIG. 9 is a diagram corresponding to FIG. 7 according to a modification of the third embodiment. It is a perspective view of the lower side valve member of Embodiment 3. FIG. 7 is a diagram corresponding to FIG. 7 according to the fourth embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

(Embodiment 1)
FIG. 1 is a diagram showing an oil pan 1 according to Embodiment 1 of the present invention. The oil pan 1 is provided at a lower portion of an engine E (shown by a phantom line in FIG. 1) mounted on the automobile, and is for storing a predetermined amount of oil circulating through the engine E.

  In the description of this embodiment, the front side of the vehicle is simply referred to as “front”, the rear side is simply referred to as “rear”, the right side is simply referred to as “right”, and the left side is simply referred to as “left”.

  The oil pan 1 includes an oil pan main body 10 and an oil filtering device 20. As shown in FIG. 3, the oil pan body 10 has a concave shape that opens upward, and is formed by molding a resin material. The oil pan main body 10 is long in the crankshaft direction of the engine E. As shown in FIG. 1, a plurality of fastening holes 11, 11,... Penetrating in the vertical direction are formed in the upper end portion of the oil pan body 10 at intervals in the circumferential direction of the upper end opening of the oil pan body 10. Yes. Each fastening hole 11 is inserted with a bolt (not shown) that is screwed into a screw hole formed in the cylinder block of the engine E. Further, fastening holes 12, 12,... Through which bolts screwed into screw holes formed in a transmission (not shown) of the vehicle are inserted are formed in the side wall portion of the oil pan body 10 at intervals. ing.

  A plurality of bosses (not shown) for fixing the oil filtering device 20 are provided inside the oil pan body 10. A fastening member such as a screw or a bolt is screwed into each boss.

  A return pipe P (represented by phantom lines in FIGS. 1 and 2) from which the return oil of the engine E is discharged is located immediately above the right rear portion of the oil pan body 10. Most of the return oil flows into the oil pan body 10 from the return pipe P, but the remainder (small amount) of the return oil drops from each part on the lower surface of the cylinder block.

  Although not shown, the engine E is provided with an oil pump. The oil pump is operated by the power of the engine E. An oil suction pipe (indicated by symbol I in FIG. 3) of the oil pump is located immediately above the left rear portion of the oil pan body 10. An oil filtration device 20 is connected to the oil suction pipe I.

  The oil filtration device 20 is configured to filter the oil (return oil) that circulates through the engine E and returns to the oil pan body 10 and supplies the oil to the engine E again. The oil filtration device 20 includes an oil receiving portion 21 that receives return oil, an oil circulation pipe portion 22 (shown in FIGS. 3 to 5) into which the return oil received by the oil receiving portion 21 is introduced, and an oil circulation pipe portion 22. , A filter 23 (shown in FIGS. 6 to 9) for filtering the oil flowing through the oil circulation pipe part 22, a valve member 24 for controlling the flow of return oil, and the valve member 24 And an actuator 25 (shown in FIG. 1) for driving the actuator 25 and a control device 26 for controlling the actuator 25.

  The oil receiver 21 is disposed inside the oil pan body 10 and is formed in a plate shape that is long in the longitudinal direction (left-right direction) of the oil pan body 10. As shown in FIG. 6, the oil circulation pipe portion 22 has a shape protruding downward from the left side of the oil receiving portion 21.

  As shown in FIGS. 1 and 3, the peripheral edge portion of the oil receiving portion 21 is located in the vicinity of the upper edge portion of the oil pan body 10 and close to the inner peripheral surface of the oil pan body 10. Accordingly, it is possible to cover a wide range of the lower surface of the cylinder block with the oil receiving portion 21, and not only return oil discharged from the return pipe P but also return oil dropped from each portion of the lower surface of the cylinder block is oil. It can be received by the receiving portion 21.

  As shown in FIGS. 6 and 7, the oil receiving portion 21 is formed so as to be positioned downward as it approaches the central portion from the peripheral portion of the oil receiving portion 21 toward the central portion. As shown in FIG. 2, fastening holes 30, 30,... Are formed in the vicinity of the peripheral edge of the oil receiving portion 21 so as to penetrate in the vertical direction. Each fastening hole 30 is in a position corresponding to the boss of the oil pan body 10. The oil receiving portion 21 is fastened and fixed to the oil pan body 10 by screwing the fastening member inserted through the fastening hole 30 into the boss.

  In addition, as a structure which fixes the oil receiving part 21 to the oil pan main body 10, you may use fixing means, such as welding and adhesion | attachment, besides the fastening structure by a fastening member. Further, the oil receiving portion 21 may be fixed to the engine E.

  As shown in FIG. 1, a shallow concave portion 31 is formed on the upper surface of the oil receiving portion 21. The recess 31 has a groove shape extending substantially straight from the vicinity of the right edge of the oil receiving portion 21 to the left side, and is positioned in the vicinity of the central portion in the front-rear direction. As shown in FIG. 7, the bottom surface of the recess 31 is inclined downward toward the left side. The oil dropped from the lower surface of the cylinder block gathers in the recess 31 and flows to the left side of the oil receiving portion 21.

  As shown in FIG. 1, the oil receiving portion 21 is provided with a guide plate 32 for guiding the return oil discharged from the return pipe P to the left side behind the concave portion 31. The guide plate 32 protrudes upward from the upper surface of the oil receiving portion 21 and is bent in a U shape that opens to the left in plan view as shown in FIG. The downstream end of the return pipe P is located inside the guide plate 32. As shown in FIG. 1, the height of the guide plate 32 decreases as it goes to the left. Accordingly, return oil is discharged from the return pipe P toward the inside of the guide plate 32, and this return oil flows to the right side, the front side, and the rear side of the oil receiving portion 21 by the guide plate 32. Stopped and guided to the left.

  A portion surrounded by the guide plate 32 on the upper surface of the oil receiving portion 21 is configured by a curved surface 33 that is curved so as to be positioned upward as it goes to the right side. The right side portion of the curved surface 33 is close to the downstream end of the return pipe P. For this reason, the oil discharged from the return pipe P can be received by the curved surface 33 near the downstream end of the return pipe P, so that the flow of the return oil is less likely to be disturbed, and the bubbles to the return oil are not disturbed. The amount of contamination is reduced.

  The oil receiver 21 is formed with an opening 36 that penetrates the oil receiver 21. The opening 36 is located on the left side of the central portion in the left-right direction of the oil receiving portion 21 and opens in a substantially rectangular shape. The portion of the oil receiving portion 21 where the opening 36 is formed is recessed downward from the upper surface of the oil receiving portion 21. The right side of the opening 36 continues to the left side of the recess 31.

  As shown in FIG. 7, the opening region on the right side of the opening portion 36 communicates with the space R <b> 1 above the oil receiving portion 21 of the oil pan body 10 and the space R <b> 2 below the oil receiving portion 21. The upper and lower space communicating portion (second communicating portion) 40 is made to be the same. On the other hand, the opening area on the left side of the opening 36 is a circulation pipe communication part (first communication part) 41 that communicates with the upstream end of the oil circulation pipe part 22.

  A protruding plate portion 42 that protrudes downward and extends in the circumferential direction is formed around the upper and lower space communication portion 40 on the lower surface of the oil receiving portion 21. As shown in FIG. 3, the downward protrusion amount of the protruding plate portion 42 increases toward the left side, and the left edge portion of the protruding plate portion 42 continues to the peripheral wall portion of the oil circulation pipe portion 22. Yes.

  The oil distribution pipe section 22 includes an inflow pipe section 51 (see FIG. 7) through which return oil flows, a filter storage section 52 that stores the filter 23, and an outflow pipe section 53 (through which the return oil filtered by the filter 23 flows). 6).

  The inflow pipe portion 51 constitutes the upstream side of the oil circulation pipe portion 22. The inflow pipe portion 51 is formed in a substantially rectangular tube shape extending in the vertical direction. The upper end of the peripheral wall portion of the inflow pipe portion 51 is continuous with the peripheral edge portion of the flow pipe communication portion 41 on the lower surface of the oil receiving portion 21. Therefore, the upper end (oil flow upstream end) of the inflow pipe portion 51 communicates with the space R1 above the oil receiving portion 21 via the flow pipe communication portion 41.

  As shown in FIG. 1, the dimension in the left-right direction of the inflow pipe portion 51 is set to be shorter than the dimension in the front-rear direction corresponding to the shape of the flow pipe communication portion 41. The cross-sectional area of the inflow pipe portion 51 is set to be equal to or greater than the cross-sectional area of the flow pipe communication portion 41. Further, as shown in FIGS. 7 and 8, a notch 55 is formed in the upper portion of the right wall portion of the inflow pipe portion 51. The notch 55 is continuous with the vertical space communication portion 40 and forms one opening together with the vertical space communication portion 40.

  As shown in FIG.4 and FIG.5, the filter accommodating part 52 is provided in the lower end part of the inflow pipe part 51, and is made into the box shape long in the front-back direction as a whole. As shown in FIGS. 6 to 8, the filter 23 accommodated in the filter accommodating portion 52 is formed in a plate shape and is fixed in a posture extending substantially horizontally in the filter accommodating portion 52. As shown in FIG. 9, the filter 23 includes a mesh portion 23a that is long in the front-rear direction as a whole, and a frame portion 23b that is integrally formed around the mesh portion 23a. It is integrally molded. The front side of the mesh part 23a is elongated in the front-rear direction, while the rear side is formed wider on the left and right than the front side. The mesh surface portion 23a is provided with reinforcing ribs (not shown).

  As shown in FIGS. 6 and 7, the filter housing portion 52 is provided with an oil suction pipe (oil suction portion) 60. The oil suction pipe 60 constitutes a passage for sucking oil stored in the space R2 below the oil receiving portion 21 of the oil pan main body 10 into the filter housing portion 52. Therefore, the inflow pipe portion 51 and the oil suction pipe 60 communicate with the filter housing portion 52. From the inflow pipe portion 51 and the oil suction pipe 60, the return oil and the oil stored in the space R2 Are designed to flow in.

  The oil suction pipe 60 protrudes from the right side wall of the filter housing portion 52 to the right side. The upstream end opening 60a of the oil suction pipe 60 is located near the center of the oil pan body 10 in the left-right direction, below the oil level L0 when the engine is stopped, and more than the oil level Lm when the engine is running. Is also located below. When the vehicle turns, the oil level Lm may be tilted as indicated by reference numerals L1 and L2. However, the oil level at the center of the oil pan main body 10 in the left-right direction is the same regardless of whether the oil level is L1 or L2. The depth can be secured deeper than a predetermined depth. That is, by positioning the upstream end opening 60a of the oil suction pipe 60 near the center of the oil pan main body 10 in the left-right direction, the oil surface Lm is inclined by centrifugal force when the vehicle turns, and is indicated by L1 and L2. Even in this state, the upstream end opening 60a of the oil suction pipe 60 can be positioned below the oil surfaces L1 and L2, and air is prevented from being sucked into the oil filtering device 20.

  The cross section of the oil suction pipe 60 has a substantially rectangular shape in which the vertical dimension is longer than the longitudinal dimension. The cross-sectional area of the oil suction pipe 60 becomes narrower as it approaches the upstream end opening 60a. The cross-sectional area of the narrowest part of the oil suction pipe 60 is set to be equal to or slightly larger than the cross-sectional area of the outflow pipe portion 53 described later.

  As shown in FIG. 8 and the like, the filter housing portion 52 is configured by combining an upper member (first member) 58 and a lower member (second member) 59. A split surface between the upper member 58 and the lower member 59 is a surface extending substantially horizontally in the vicinity of the upper portion of the filter housing portion 52. The upper member 58 includes a plate-like portion constituting the upper wall portion of the filter housing portion 52, and the upper wall portion and the inflow pipe portion 51 are integrally formed. Further, the upper member 58 is formed with an extending plate portion 61 that constitutes the upper wall portion of the oil suction pipe 60. On the other hand, the lower member 59 is a concave member that constitutes the bottom wall portion and the peripheral wall portion of the filter housing portion 52.

  On the peripheral edge of the lower surface of the upper member 58, an upper welding protrusion 62 welded to the lower member 59 is formed except for the downstream end opening 60 a of the oil suction pipe 60. Further, a peripheral wall 63 is formed on the periphery of the lower surface of the upper member 58 so as to surround the upper welding ridge 62 on the outer side of the upper welding ridge 62.

  Further, on the lower surface of the upper member 58, a step portion 64 is formed on the inner side of the upper welding protrusion 62 to fit the frame portion 23 b of the filter 23.

  Further, as shown in FIG. 12, upper first to third plate portions 65 to 67 are formed on the lower surface of the upper member 58 in the vicinity of the base end portion of the extending plate portion 61 in order from the front side to the rear side. Has been. The upper first to third plate portions 65 to 67 extend substantially parallel to the center line of the oil suction pipe 60 and downward. The thicknesses of the upper first to third plate portions 65 to 67 are set so as to become thinner toward the lower side. Further, the width of the upper first to third plate portions 65 to 67 (dimension in the direction of the center line of the oil suction pipe 60) is set to become narrower as it goes downward.

  On the other hand, the lower member 59 is configured such that the upper portion is closed by the upper member 58. As shown in FIGS. 10 and 11, a lower welding protrusion 69 is formed on the peripheral edge of the upper end portion of the lower member 59 corresponding to the upper welding protrusion 62. As shown in FIG. 8, the upper and lower welding protrusions 62 and 69 are welded by a well-known vibration welding method so that the upper member 58 and the lower member 59 are integrated. In this state, the space between the upper member 58 and the lower member 59 is sealed except for the oil suction pipe 60. When welding the upper member 58 and the lower member 59, the upper member 58 may be fixed and the lower member 59 may be vibrated in the left-right direction.

  The upper member 58 and the lower member 59 may be welded using a welding method other than vibration welding, or may be bonded using an adhesive.

  As shown in FIG. 10, first and second restricting plates 71 and 72 for restricting the internal passage of the filter housing portion 52 are provided inside the lower member 59. The first aperture plate 71 extends upward from the bottom wall of the lower member 59 and extends rearward from the inner surface of the front wall of the filter housing portion 52. The second diaphragm plate 72 extends upward from the bottom wall of the lower member 59, extends to the left side from the inner surface of the right wall of the filter housing portion 52, and then bends and extends forward at a substantially right angle. The rear edge portion of the first diaphragm plate 71 and the front edge portion of the second diaphragm plate 72 face each other in the front-rear direction, and oil flows between them. The cross-sectional area of the oil passage between the rear edge portion of the first throttle plate 71 and the front edge portion of the second throttle plate 72 is set to be approximately equal to or slightly larger than the cross-sectional area of the outflow pipe portion 53.

  Lower welding protrusions 69 are also provided on the upper edge portions of the first and second diaphragm plates 71 and 72. The lower welding protrusions 69 of the first and second diaphragm plates 71 and 72 are also welded to the upper welding protrusion 62 of the upper member 58.

  As shown in the sectional structure of the second diaphragm plate 72 in FIG. 8, the first and second diaphragm plates 71 and 72 are hollow inside. Since the first and second diaphragm plates 71, 72 are connected to the bottom wall and the peripheral wall portion of the lower member 59, the first and second diaphragm plates 71, 72 function as ribs of the lower member 59, and This contributes to improving the rigidity of the side member 59. Further, the first and second diaphragm plates 71 and 72 are welded to the upper member 58, so that the welding strength between the upper member 58 and the lower member 59 can be increased, and the entire filter housing portion 52 can be improved. Stiffness is improved. Further, as shown in FIG. 8, the upper portions of the first and second diaphragm plates 71 and 72 abut against the frame portion 23 b of the filter 23 from below to support the filter 23.

  As shown in FIG. 10, lower first to fourth plate portions 81 to 84 are formed on the bottom wall of the lower member 59 in the vicinity of the base end portion of the oil suction pipe 60 in order from the front side to the rear side. Has been. The lower first to fourth plate portions 81 to 84 extend substantially parallel to the center line of the oil suction pipe 60 and upward. The thickness of the lower first to fourth plate portions 81 to 84 is set so as to become thinner toward the upper side. Further, the widths of the lower first to fourth plate portions 81 to 84 (dimensions in the direction of the center line of the oil suction pipe 60) are set so as to narrow toward the upper side.

  The lower first plate portion 81 is integrated with the side surface of the oil suction pipe 60, and the lower fourth plate portion 84 is also integrated with the side surface of the oil suction pipe 60. Therefore, no oil flows from between the lower first plate portion 81 and the side surface of the oil suction pipe 60, and no oil flows from between the lower fourth plate portion 84 and the side surface of the oil suction pipe 60. There is no such thing.

  As shown in FIG. 13, when the upper member 58 and the lower member 59 are integrated, the upper first plate portion 65 is inserted between the lower first plate portion 81 and the lower second plate portion 82. The upper second plate portion 66 is inserted between the lower second plate portion 82 and the lower third plate portion 83, and the upper third plate portion 67 is inserted into the lower third plate portion 83 and the lower third plate portion 83. It is inserted between the four plate portions 84.

  A gap S1 is formed between the upper first plate portion 65 and the lower first plate portion 81 and the lower second plate portion 82. A gap S2 is also formed between the upper second plate portion 66, the lower second plate portion 82, and the lower third plate portion 83, and the upper third plate portion 67 and the lower third plate portion. A gap S <b> 3 is also formed between 83 and the lower fourth plate portion 84. The total opening area of the gaps S <b> 1 to S <b> 3 is set to be equal to or slightly larger than the cross-sectional area of the narrowest portion of the oil suction pipe 60. However, the total opening area of the gaps S <b> 1 to S <b> 3 is smaller than the cross-sectional area of the inflow pipe portion 51.

  That is, the upper first to third plate portions 65 to 67 and the lower first to fourth plate portions 81 to 84 constitute resistance means that provides a flow resistance of oil sucked from the oil suction pipe 60. . The magnitude | size of the resistance by a resistance means is arbitrarily changed with the magnitude | sizes of the clearance gaps S1-S3 between upper side 1st-3rd board parts 65-67 and lower side 1st-4th board parts 81-84. Is possible. In addition, when the widths of the upper first to third plate portions 65 to 67 and the lower first to fourth plate portions 81 to 84 are increased, the resistance is increased, and when the width is decreased, the resistance is decreased. It is possible to arbitrarily change the size of. Furthermore, if the protruding amount of the upper first to third plate portions 65 to 67 and the lower first to fourth plate portions 81 to 84 is increased, the resistance is increased, and if the protruding amount is decreased, the resistance is decreased. It is possible to arbitrarily change the size of.

  As shown in FIG. 6, the outflow pipe portion 53 extends upward from the upper wall portion of the filter housing portion 52, penetrates through the oil receiving portion 21, and protrudes upward from the upper surface of the oil receiving portion 21. That is, the passage in the oil circulation pipe part 22 is formed by the inflow pipe part 51, the filter housing part 52, and the outflow pipe part 53, and extends in a substantially U shape.

  As shown in FIG. 4, the base end portion (lower end portion) that is the upstream end of the outflow pipe portion 53 is located farther to the rear side than the inflow pipe portion 51. The cross section of the outflow pipe portion 53 is substantially circular, and the cross sectional area is narrower than the cross sectional area of the inflow pipe portion 51.

  The peripheral wall portion of the outflow pipe portion 53 and the peripheral wall portion of the inflow pipe portion 51 are connected by a connecting plate portion 54. The connecting plate portion 54 is integrally formed with the peripheral wall portion of the outflow pipe portion 53 and the peripheral wall portion of the inflow pipe portion 51. Thereby, the outflow pipe part 53 and the inflow pipe part 51 are integrated, and rigidity is improved.

  As shown in FIGS. 7 and 8, the valve member 24 is disposed in the opening 36. The valve member 24 is in a situation where the warm-up operation is performed as in the cold start, and when the oil temperature is low, the return oil is caused to flow through the oil circulation pipe portion 22 and the oil temperature is high as in the normal operation. In some cases, the return oil is caused to flow into a space R2 below the oil receiving portion 21 of the oil pan body 10.

  The valve member 24 is a so-called butterfly type valve member for opening and closing the first valve body 24 a for opening and closing the flow pipe communication portion 41 of the oil receiving portion 21 and the upper and lower space communication portion 40 of the oil receiving portion 21. The second valve body 24b and the rotating shaft 24c are provided. The first and second valve bodies 24a and 24b are integrally formed using a resin material. The first valve body 24 a of the valve member 24 has a substantially rectangular plate shape formed along the peripheral edge of the flow pipe communication portion 41, and the second valve body 24 b is a peripheral edge of the vertical space communication portion 40. It is the substantially rectangular plate shape formed so that. The first valve body 24a and the second valve body 24b have substantially the same shape, and when viewed from the direction in which the rotation shaft 24c extends as shown in FIG. 7, the first valve body 24a and the second valve body 24b. The angle on the lower side is less than 180 °. The valve member 24 is provided with a rib 24e extending so as to connect the first valve body 24a and the second valve body 24b.

  The rotating shaft 24c is provided between the first valve body 24a and the second valve body 24b. The rotating shaft 24c is also integrally formed with the first valve body 24a and the second valve body 24b. The rotating shaft 24c is a hollow shaft that opens to both ends. A drive shaft 80 for driving the valve member 24 is inserted into the rotation shaft 24c.

  The valve member 24 is attached to the oil receiving portion 21 in a state in which both longitudinal sides of the rotating shaft 24c are rotatably supported by the oil receiving portion 21. That is, bearing holes 42a (see FIG. 8) extending substantially horizontally in the left-right direction are formed on the left and right sides of the protruding plate portion 42 of the oil receiving portion 21, respectively. The rotation shaft 24c is inserted through the bearing hole 42a. The drive shaft 80 inserted through the rotating shaft 24 c penetrates the projecting plate portion 42, penetrates the rear wall portion of the oil pan body 10, and projects toward the rear side of the oil pan body 10.

  The valve member 24 rotates around the rotation shaft 24c and changes its posture. As shown in FIGS. 7 and 8, when the second valve body 24 b rotates until the valve member 24 is substantially flush with the bottom surface of the recess 31 of the oil receiving portion 21, the first valve body 24 a is in communication with the flow pipe. Positioned below the portion 41, the flow pipe communication portion 41 is opened, and the second valve body 24b is in a posture to close the vertical space communication portion 40 (at the time of warm-up operation). On the other hand, as shown in FIG. 14, when the valve member 24 rotates until the first valve body 24 a is substantially flush with the peripheral edge portion of the flow pipe communication portion 41 of the oil receiving portion 21, the first valve body 24 a The flow pipe communication portion 41 is closed, the second valve body 24b is positioned below the vertical space communication portion 40, and the vertical space communication portion 40 is opened (posture during normal operation).

  As shown in FIG. 8, when the valve member 24 is in the posture during the warm-up operation, the cutout portion 55 at the top of the inflow pipe portion 51 is closed by the first valve body 24a. At this time, since the second valve body 24b is continuous with the bottom surface of the recess 31, and the first valve body 24c and the second valve body 24b are continuous, the second valve body 24b and the first valve body 24a are connected from the recess 31. A portion through which oil can flow is formed.

  On the other hand, as shown in FIG. 14, when the valve member 24 is in the normal operation posture, the second plate portion 24b is positioned so as to cover the cutout portion 55 from the right side. Therefore, it becomes difficult for the return oil of the oil receiving part 21 to enter the oil circulation pipe part 22 from the notch part 55.

  Further, the valve member 24 can be stopped at an arbitrary position within a rotation range between the posture during the warm-up operation and the posture during the normal operation. Therefore, it is possible to open the circulation pipe communication part 41 about half or to open the vertical space communication part 40 about half.

  As shown in FIG. 1, the actuator 25 is disposed outside the oil pan body 10. The output shaft of the actuator 25 is connected to the drive shaft 80 so that the output of the actuator 25 is transmitted to the valve member 24. The type of the actuator 25 may be electric or may be one that uses the negative pressure of the intake system of the engine E, and is not particularly limited.

  The control device 26 is connected to the actuator 25. The control device 26 is connected to a temperature sensor 81 that detects the temperature state of the oil in the oil pan body 10. The control device 26 is configured to control the actuator 25 based on the output signal of the temperature sensor 81. That is, when the temperature sensor 81 detects that the temperature of the oil is, for example, 10 ° C. or less, it is determined that the engine E is in a cold start state, and the valve member 24 assumes a posture during a warm-up operation. A control signal is output to the actuator 25. On the other hand, when the temperature sensor 81 detects that the temperature of the oil is, for example, 50 ° C. or more, the actuator determines that the engine E is in a normal operation state and the valve member 24 is in a normal operation posture. 25 outputs a control signal. The specific value of the temperature is merely an example, and may be any value as long as it can distinguish between a situation where warm-up is required at the time of cold start and a situation where other normal operation is performed, and is limited to the above. It is not a thing.

  The control device 26 may estimate the temperature state of the oil based on, for example, the water temperature or the outside air temperature without directly detecting the temperature of the oil. Further, the oil temperature state may be estimated based on the operation time of the engine E or the like. And it is also possible to control the actuator 25 based on such information. The valve member 24, the actuator 25, and the control device 26 constitute an opening / closing means C.

  Next, the operation of the oil pan 1 configured as described above will be described. When the engine E is performing a warm-up operation at a cold start, the control device 26 controls the actuator 25 so that the posture of the valve member 24 becomes the posture during the warm-up operation (shown in FIG. 8). When the engine E is in an operating state, a negative pressure is applied to the inside of the oil circulation pipe portion 22 by the oil pump.

  Then, return oil is discharged from the return pipe P of the engine E. The return oil discharged from the return pipe P flows into the guide plate 32 and is guided to the left side, that is, the opening 36 by the guide plate 32. Oil dropped from the lower surface of the cylinder block is received by each part of the oil receiving part 21 and flows toward the recessed part 31. The oil in the recess 31 flows to the opening 36 side.

  At this time, the vertical space communicating portion 40 is closed by the second valve body 24b, the notch portion 55 is closed by the first valve body 24a, and the flow pipe communicating portion 41 is opened, so that the engine E is circulated. The return oil whose temperature has been raised then flows into the inflow pipe portion 51 of the oil flow pipe portion 22 from the flow pipe communication portion 41 and flows downward. The oil that has flowed through the inflow pipe portion 51 flows into the filter housing portion 52, passes between the first and second throttle plates 71 and 72, changes the flow direction upward, and passes through the filter 23. This filters the oil.

  The oil filtered by the filter 23 is sucked into the engine E through the outflow pipe portion 53.

  That is, during the warm-up operation, the return oil received by the oil receiving part 21 is filtered by the filter 23 while flowing through the oil circulation pipe part 22 and then supplied to the engine E. The low-temperature oil stored in the main body 10 and the return oil that has been circulated through the engine E and heated up are less likely to be mixed. As a result, the return oil in which the temperature drop is suppressed is directly supplied to the engine E by the oil circulation pipe portion 22. Thereby, it becomes possible to supply low-viscosity oil to the engine E at an early stage, and the warm-up time of the engine E is shortened.

  In addition, during the warm-up operation, the oil viscosity is high because the temperature of the oil in the oil pan body 10 is low. Therefore, the amount of oil sucked from the oil suction pipe 60 of the oil circulation pipe part 22 is small. In addition, in the oil suction pipe 60, upper first to third plate portions 65 to 67 and lower first to fourth plate portions 81 to 84 are disposed, and the oil in the oil suction pipe 60 is disposed. This also suppresses the low temperature oil from flowing into the oil circulation pipe part 22.

  During the warm-up operation, for example, when the rotational speed of the engine E rises higher than the idle rotational speed and the required amount of oil increases, the negative pressure in the oil circulation pipe portion 22 increases. When the negative pressure in the oil circulation pipe part 22 increases, the oil stored in the lower space R2 is sucked into the oil circulation pipe part 22 from the oil suction pipe 60. This avoids poor lubrication due to insufficient oil supply.

  On the other hand, when the temperature of the oil rises and the warm-up operation ends, the control device 26 controls the actuator 25 so that the posture of the valve member 24 becomes the posture during normal operation (shown in FIG. 14). As a result, the upper and lower space communicating portion 40 is opened, so that the return oil flows through the oil receiving portion 21 and flows into the lower space R2 through the upper and lower space communicating portion 40.

  The return oil dropped on the left side of the oil receiving portion 21 flows on the surface of the first valve body 24a and the surface of the second valve body 24b of the valve member 24 and flows into the lower space R2. That is, the first valve body 24a and the second valve body 24b constitute an oil guide surface.

  The return oil flowing into the lower space R2 is mixed with the oil stored in the lower space R2. And the temperature of the oil of lower space R2 rises, and a viscosity falls. Since the oil whose viscosity has decreased is easy to flow through the oil suction pipe 60, it is possible to introduce a sufficient amount of oil into the oil circulation pipe section 22, and it can cope with a large amount of oil required. Further, since the return oil is caused to flow into the lower space R2, it is possible to suppress the temperature of the return oil from being excessively increased.

  Since the valve member 24 can be stopped between the posture during the warm-up operation and the posture during the normal operation, the vertical space communication portion 40 and the flow pipe communication portion 41 are determined depending on the stop position of the valve member 24. It is possible to change the opening degree. Accordingly, a part of the return oil can be flowed to the flow pipe communication portion 41 and the rest can be flowed to the upper and lower space communication portion 40, and the ratio of the return oil flowing to the flow pipe communication portion 41 and the upper and lower space communication portion 40 can be changed. . Thereby, the temperature control of oil can be performed finely.

  As described above, according to the first embodiment, the return oil received by the oil receiving portion 21 is caused to flow to the oil circulation pipe portion 22 and is filtered by the filter 23 disposed inside the oil circulation pipe portion 22. Since the engine E is supplied, the return oil whose temperature has been raised can be supplied directly to the engine E. Thereby, the temperature rise of the oil can be accelerated, the warm-up time of the engine E can be shortened, and energy saving can be realized.

  Further, since the oil suction pipe 60 is provided on the upstream side of the filter 23 in the oil circulation pipe section 22, it is possible to prevent poor lubrication of the engine E when the required amount of oil is large. Further, since the gaps S1 to S3 having a smaller cross-sectional area than the inflow pipe portion 51 are provided in the oil suction pipe 60, when the required amount of oil is small, the intake amount of low-temperature oil is reduced and the warm-up time is reduced. Can be shortened. Therefore, both trouble prevention of the engine E and energy saving can be achieved.

  Moreover, since the upper and lower space communication part 40 and the flow pipe communication part 41 are opened and closed by the integral valve member 24, a simple structure with a small number of parts can be achieved. Thereby, the assembly work can be easily performed, and the cost can be reduced.

(Embodiment 2)
FIG. 15 shows a part of an oil pan 1 according to Embodiment 2 of the present invention. The oil pan 1 of the second embodiment is different from that of the first embodiment because the oil distribution pipe portion 22 of the oil filtering device 20 is different from that of the first embodiment except for the other parts. The part will be described in detail.

  In the second embodiment, the filter 90 is accommodated in the outflow pipe portion 53 of the oil circulation pipe portion 22. The filter 90 includes a mesh portion 90a extending in a substantially vertical direction, and upper and lower fixing portions 90b and 90c provided at the upper end portion and the lower end portion of the mesh portion 90a, respectively. The mesh part 90a is disposed inside the outflow pipe part 53 so as to intersect the axis of the outflow pipe part 53, and the entire amount of oil flowing through the outflow pipe part 53 passes through the mesh part 90a. The upper and lower fixing portions 90 b and 90 c are formed in an annular shape extending along the inner peripheral surface of the outflow pipe portion 53. Inside the outflow pipe portion 53, an upper contact portion 53a that contacts the upper fixing portion 90b from above and a lower contact portion 53b that contacts the lower fixing portion 90c from below are formed. The filter 90 is positioned by the contact portions 53a and 53b.

  The fixing structure of the filter 90 is not limited to the above, and may be adhesion or the like.

  In addition, an oil suction port (opening) 91 is formed in a wall portion (bottom wall portion) at the lower end portion of the oil circulation pipe portion 22 at a portion away from just below the filter 90. The opening area of the oil suction port 91 is set smaller than the cross-sectional area of the inflow pipe portion 51 of the oil circulation pipe portion 22 and equal to the cross-sectional area of the outflow pipe portion 53. The oil suction port 91 can be constituted by a slit or the like, for example. The oil suction port 91 functions as a drain port for draining the oil in the oil circulation pipe part 22 at the time of oil replacement.

  Next, the operation of the oil pan 1 configured as described above will be described. When the engine E is performing the warm-up operation, the posture of the valve member 24 is the posture during the warm-up operation (shown in the figure), and the return oil flows into the inflow pipe portion 51 of the oil distribution pipe portion 22. Then, after flowing downward, the direction is changed upward to flow through the outflow pipe portion 53. The oil flowing through the outflow pipe portion 53 is filtered through the filter 90 and sucked into the engine E.

  Further, during the warm-up operation, since the temperature of the oil in the space R2 below the oil pan body 10 is low and the viscosity of the oil is high, the amount of oil sucked from the oil suction port 91 of the oil circulation pipe portion 22 is small. Moreover, since the opening area of the oil suction port 91 is smaller than the cross-sectional area of the oil circulation pipe portion 22, the amount of oil in the lower space R2 sucked into the oil circulation pipe portion 22 is reduced.

  During the warm-up operation, for example, when the required amount of oil of the engine E increases, the negative pressure in the oil circulation pipe portion 22 increases, so that the oil stored in the lower space R2 is discharged from the oil suction port 91. It will be sucked into the oil distribution pipe part 22. This avoids poor lubrication due to insufficient oil supply.

  On the other hand, when the temperature of the oil rises and the warm-up operation ends, the posture of the valve member 24 becomes the posture during normal operation, although not shown. As a result, the upper and lower space communicating portion 40 is opened, so that the return oil flows through the oil receiving portion 21 and flows into the lower space R2 through the upper and lower space communicating portion 40.

  As described above, according to the second embodiment, similarly to the first embodiment, the return oil received by the oil receiving portion 21 is caused to flow to the oil circulation pipe portion 22 and is disposed inside the oil circulation pipe portion 22. Since the filtered oil is filtered by the filter 90 and supplied to the engine E, the heated return oil can be directly supplied to the engine E. Thereby, the temperature rise of the oil can be accelerated, the warm-up time of the engine E can be shortened, and energy saving can be realized.

  Further, since the oil suction port 91 having an opening area smaller than the cross-sectional area of the oil circulation pipe part 22 is formed on the upstream side of the filter 90 in the oil circulation pipe part 22, the engine E when the required amount of oil is large. In this case, it is possible to reduce the warm-up time when the required amount of oil is small, and to prevent both troubles and save energy in the engine E.

  In addition, since the filter 90 is accommodated in the outflow pipe portion 53, the oil circulation pipe portion 22 can be made smaller than in the case of the first embodiment.

  The oil suction port 91 may be formed only on the side wall portion of the oil circulation pipe portion 22, or may be formed on both the bottom wall portion and the side wall portion. Further, the shape of the oil suction port 91 may be circular. Further, the number of oil suction ports 91 may be one, or may be three or more.

  Further, as in Modification 1 shown in FIG. 16, a wall portion 92 that protrudes outward (downward) from the oil circulation pipe portion 22 may be provided at the peripheral portion of the oil suction port 91. The wall 92 is for increasing the flow resistance when the oil flows into the oil suction port 91. As a result, the amount of oil in the lower space R2 flowing into the oil circulation pipe portion 22 during the warm-up operation can be reduced, and the warm-up time can be shortened.

  Further, as in Modification 2 shown in FIGS. 17 and 18, a bottomed cylindrical portion 93 protruding outward (downward) from the oil circulation pipe portion 22 may be provided on the peripheral edge portion of the oil suction port 91. . The cylinder portion 93 is for increasing flow resistance when oil flows into the oil suction port 91. As shown in FIG. 18 in an enlarged manner, slits 93a, 93a,... Extending in the vertical direction are formed on the lower side of the peripheral wall portion of the cylindrical portion 93 at intervals in the circumferential direction. Is supposed to flow in. Also according to the second modification, the amount of oil in the lower space R2 flowing into the oil circulation pipe portion 22 during the warm-up operation can be reduced, and the warm-up time can be shortened. In addition, the cylindrical portion 93 may be provided away from a position directly below the filter 90. Further, a plurality of cylinder portions 93 may be provided. Moreover, the cylinder part 93 functions also as a drain port at the time of oil replacement | exchange.

  Moreover, you may make it open | release the lower end part of the oil distribution pipe part 22 like the modification 3 shown in FIG. The lower end portion of the oil circulation pipe portion 22 is close to the bottom wall portion of the oil pan body 10, and a narrow gap is formed between the lower end portion of the oil circulation pipe portion 22 and the bottom wall portion of the oil pan body 10. Has been. Further, cutout portions 94, 94,... Are formed at the lower end portion of the oil circulation pipe portion 22 at intervals in the circumferential direction.

  In addition, a plurality of protruding walls 95 and 95 are formed on the bottom wall portion of the oil pan body 10 so as to protrude upward so as to surround a part of the lower end portion of the oil circulation pipe portion 22. The protruding walls 95, 95 are arranged at intervals in the circumferential direction of the oil circulation pipe part 22. The protruding wall 95 and the oil circulation pipe portion 22 are close to each other. Oil in the lower space R <b> 2 passes between the projecting walls 95, 95, and is sucked into the oil circulation pipe portion 22 from the gap between the lower end portion of the oil circulation pipe portion 22 and the bottom wall portion of the oil pan body 10. It is. By changing the separation distance between the protruding wall 95 and the oil circulation pipe part 22 and changing the separation distance between the lower end part of the oil circulation pipe part 22 and the bottom wall part of the oil pan body 10, oil to the oil circulation pipe part 22 is obtained. The amount of inflow can be adjusted.

  Further, the protruding wall 95 is integrally formed with the oil pan main body 10, but is not limited thereto, and may be assembled to the oil pan main body 10 as a separate part.

(Embodiment 3)
FIG. 20 shows an oil filtration device 20 according to Embodiment 3 of the present invention. The oil filtration device 20 of the third embodiment is different from that of the first embodiment in the structure of the valve member 97. Hereinafter, a different part from Embodiment 1 is demonstrated in detail.

  The valve member 97 includes a first valve body 97a for opening and closing the flow pipe communication portion 41 of the oil receiving portion 21, a second valve body 97b for opening and closing the upper and lower space communication portion 40 of the oil receiving portion 21, A moving shaft 97c and a third valve body 97d for opening and closing part of the oil suction pipe 60 are provided.

  As shown in FIG. 21, the third valve body 97d is formed in a plate shape extending from between the first valve body 97a and the second valve body 97b. The width of the third valve body 97d is narrower than the width of the first valve body 97a. Further, a part of the oil suction pipe 60 is closed by the distal end side of the third valve body 97d. Notches 97e and 97e are formed on the distal end side of the third valve body 97d. The number of notches 97e may be one, or may be three or more. A through hole or the like may be formed instead of the notch 97e.

  When the valve member 97 is in the warm-up operation posture (shown in FIG. 20), the third valve body 97d is positioned so as to close a part of the oil suction pipe 60. The distal end side of the third valve body 97d gives flow resistance to the oil flowing through the oil suction pipe 60. On the other hand, as indicated by a virtual line in FIG. 20, when the valve member 97 is in the normal operation posture, the third valve body 97d is separated from the oil suction pipe 60, so that the oil suction pipe 60 is entirely opened.

  Next, the operation of the third embodiment will be described. When the engine E is performing the warm-up operation, the posture of the valve member 97 is the posture during the warm-up operation, and the return oil flows into the inflow pipe portion 51 of the oil circulation pipe portion 22 and flows downward. Thereafter, the flow is changed upward and flows through the outflow pipe portion 53. Oil flowing through the outflow pipe portion 53 is filtered through the filter 23 and sucked into the engine E.

  Further, during the warm-up operation, since the temperature of the oil in the space R2 below the oil pan body 10 is low and the viscosity of the oil is high, the amount of oil sucked from the oil suction pipe 60 of the oil circulation pipe section 22 is small. Moreover, since the oil suction pipe 60 is partially covered by the third valve body 97d, this also reduces the amount of oil in the lower space R2 that is sucked into the oil circulation pipe section 22.

  During the warm-up operation, for example, when the required amount of oil of the engine E increases, the negative pressure in the oil circulation pipe portion 22 increases, so that the oil stored in the lower space R2 is discharged from the oil suction pipe 60. The oil distribution pipe portion 22 is sucked through the cutout portion 97e of the third valve body 97d. This avoids poor lubrication due to insufficient oil supply.

  On the other hand, when the temperature of the oil rises and the warm-up operation ends, the posture of the valve member 97 becomes the posture during normal operation. As a result, the upper and lower space communicating portion 40 is opened, so that the return oil flows through the oil receiving portion 21 and flows into the lower space R2 through the upper and lower space communicating portion 40. Further, since the third valve body 97d is separated from the oil suction pipe 60, the oil in the lower space R2 is sucked from the oil suction pipe 60.

  Further, when the amount of oil required by the engine suddenly increases, such as when the vehicle suddenly starts running after the engine is started, the valve member 97 is rotated so as to open the oil suction pipe 60. Has been. As a result, the amount of oil supplied can be made as required by the engine.

  As described above, according to the oil pan 1 according to the third embodiment, as in the first embodiment, the return oil received by the oil receiving portion 21 is caused to flow to the oil circulation pipe portion 22, and this oil circulation pipe portion 22. Since the oil is filtered by the filter 23 disposed inside the engine E and supplied to the engine E, the return oil whose temperature has been raised can be directly supplied to the engine E. Thereby, the temperature rise of the oil can be accelerated, the warm-up time of the engine E can be shortened, and energy saving can be realized.

  Moreover, you may provide the lower valve member 100 instead of the 3rd valve body 97d like the modification shown in FIG.22 and FIG.23. The lower valve member 100 is disposed inside the oil suction pipe 60. The lower valve member 100 includes a valve body 100a, a rotation shaft 100b, and side wall portions 100c provided at both edges of the valve body 100a in the rotation axis direction. The rotation shaft 100b extends in a substantially horizontal direction and is rotatably supported on the side wall portion of the oil suction pipe 60. The valve body 100 a is formed in a plate shape that is slightly smaller than the cross-sectional shape of the oil suction pipe 60. A gap is formed between the peripheral edge of the valve body 100 a and the inner peripheral surface of the oil suction pipe 60. The side wall portion 100 c extends substantially parallel to the side surface of the oil suction pipe 60. Oil exists between the side wall portion 100 c and the side surface of the oil suction pipe 60. Therefore, when the lower valve member 100 tries to rotate, the lower valve member 100 is difficult to rotate due to the shearing resistance of the oil between the side wall portion 100 c and the side surface of the oil suction pipe 60. The lower the oil temperature, the greater the force required to rotate the lower valve member 100. The force required for the rotation of the lower valve member 100 can be changed depending on the length and width of the side wall portion 100c, the size of the gap between the side wall portion 100c and the side surface of the oil suction pipe 60, and the like.

  During the warm-up operation, since the temperature of the oil in the oil pan body 10 is low and the viscosity is high, the lower valve member 100 is difficult to open the oil suction pipe 60. Therefore, the amount of oil sucked from the oil suction pipe 60 is small. On the other hand, when the temperature of the oil rises and the warm-up operation is finished, the lower valve member 100 easily opens the oil suction pipe 60 because the viscosity of the oil is low. Accordingly, oil is sucked from the oil suction pipe 60.

  Further, when the vehicle travels without performing warm-up operation, the amount of oil required by the engine increases rapidly, and the negative pressure in the oil distribution pipe portion 22 increases. Since the lower valve member 100 is opened by this negative pressure, there is no shortage of oil supply.

(Embodiment 4)
FIG. 24 shows an oil filtration device 20 according to Embodiment 4 of the present invention. The oil filtration device 20 of the fourth embodiment is different from that of the second embodiment in that it includes a first valve member 101 and a second valve member 102. Hereinafter, a different part from Embodiment 2 is demonstrated in detail.

  The oil receiving portion 21 has an upper and lower space communication port (second communicating portion) 103 that allows communication between a space R1 above the oil receiving portion 21 of the oil pan body 10 and a space R2 below the oil receiving portion 21. And a circulation pipe communication port (first communication part) 104 communicating with the upstream end of the oil circulation pipe part 22 is formed.

  The first valve member 101 is for opening and closing the flow pipe communication port 104, and includes a valve body 101a and a rotating shaft 101b. The rotation shaft 101b is rotatably supported by the oil receiving portion 21.

  The second valve member 102 is for opening and closing the upper and lower space communication port 103, and includes a valve body 102a and a rotation shaft 102b. The rotation shaft 102b is rotatably supported by the oil receiving portion 21. An output shaft of an actuator (not shown) similar to that of the first embodiment is connected to the rotation shaft 102b and the rotation shaft 101b, and similarly rotates according to the temperature of the oil.

  That is, as shown in FIG. 24, during the warm-up operation, the first valve member 101 opens the flow pipe communication port 104, and the second valve member 102 closes the vertical space communication port 103. Further, during normal operation, as indicated by a virtual line, the first valve member 101 closes the flow pipe communication port 104 and the second valve member 102 opens the upper and lower space communication port 103.

  Next, the operation of the fourth embodiment will be described.

  During the warm-up operation, the circulation pipe communication port 104 is opened and the upper and lower space communication ports 103 are closed, so that return oil flows from the circulation pipe communication port 104 into the oil circulation pipe portion 22 and passes through the filter 90 and is filtered. After that, it is sucked into the engine E.

  On the other hand, when the warm-up operation ends, the circulation pipe communication port 104 is closed and the upper and lower space communication port 103 is opened. As a result, the return oil flows into the lower space R2.

  As described above, according to the oil pan 1 according to the fourth embodiment, the return oil received by the oil receiving part 21 flows into the oil circulation pipe part 22, and the filter disposed inside the oil circulation pipe part 22. Since the oil is filtered at 90 and supplied to the engine E, the return oil whose temperature has been raised can be directly supplied to the engine E. Thereby, the temperature rise of the oil can be accelerated, the warm-up time of the engine E can be shortened, and energy saving can be realized.

  Moreover, since the 1st valve member 101 and the 2nd valve member 102 can open and close the flow pipe communication port 104 and the up-and-down space communication port 103 independently, the timing and opening degree of opening and closing can be changed separately. . This makes it possible to finely control the temperature of the oil.

  The first valve member 101 and the second valve member 102 may be connected by a link or the like and moved by one actuator. Further, only one of the first valve member 101 and the second valve member 102 may be moved according to the temperature state of the oil.

  In the first to fourth embodiments, the case where the present invention is applied to the automobile engine E has been described. However, the present invention is not limited thereto, and the present invention can be applied to various engines for construction machines, power generation engines, and automatic vehicles. It can be used for a transmission or the like.

  Moreover, you may comprise the oil receiving part 21 and the oil distribution pipe part 22 with another member.

  Moreover, you may comprise the oil pan main body 10 with resin, a steel plate, and aluminum casting, for example. Also,

  As described above, the oil filtration device and the oil pan according to the present invention can be applied to, for example, an automobile engine.

DESCRIPTION OF SYMBOLS 1 Oil pan 10 Oil pan main body 20 Oil filtration apparatus 21 Oil receiving part 22 Oil distribution pipe part 23 Filter 24 Valve member 24a 1st valve body 24b 2nd valve body 25 Actuator 26 Control apparatus 40 Vertical space communication part (2nd communication part) )
41 Distribution pipe communication section (first communication section)
101 1st valve member 102 2nd valve member 103 Vertical space communication port (2nd communication part)
104 Distribution pipe communication port (1st communication part)
C Opening / closing means E Engine (power unit)
P Return pipe

Claims (8)

In the oil filtration device that is arranged in an oil pan main body in which oil circulating through the power unit is stored, and configured to filter and supply the oil stored in the oil pan main body to the power unit,
An oil receiving portion for receiving the return oil returned from circulating through the power unit;
An oil circulation pipe part into which the oil received by the oil receiving part is introduced;
A filter that is disposed inside the oil circulation pipe part and that filters oil flowing through the oil circulation pipe part;
On the upstream side of the filter of the oil circulation pipe part, an oil suction part for sucking oil into the oil circulation pipe part is provided below the oil level of the oil stored in the oil pan body. ,
An oil filtration device, wherein a downstream portion of the oil circulation pipe portion is connected to an oil suction portion of the power unit. The oil filtration device according to claim 1,
The oil filtration device, wherein the oil suction part has an opening having an area smaller than a cross-sectional area on the upstream side of the oil circulation pipe part. The oil filtration device according to claim 1,
The oil distribution pipe part is configured by combining the first member and the second member,
The oil suction part is a gap formed between the first member and the second member,
An oil filtration device characterized in that an area of the gap is smaller than a cross-sectional area on the upstream side of the oil circulation pipe part. In the oil filtration device according to any one of claims 1 to 3,
The oil receiving portion includes a first communicating portion communicating with the upstream end of the oil circulation pipe portion, and a second communicating portion penetrating the oil receiving portion and communicating with a space below the oil receiving portion in the oil pan body. And an opening / closing means for opening / closing at least the second communication portion is provided,
The oil filter device, wherein the opening / closing means is configured to open the second communication portion when the temperature state of the oil is equal to or higher than a predetermined temperature. The oil filtration device according to claim 4,
The opening / closing means includes a valve member that opens and closes the first communication portion and the second communication portion, and a drive device that drives the valve member,
When the temperature state of the oil is lower than a predetermined temperature, the drive device operates the valve member so as to open the first communication portion and close the second communication portion, while the oil temperature state is predetermined. When the temperature is higher than the temperature, the valve member is operated so as to close the first communication part and open the second communication part. The oil filtration device according to claim 4,
The opening / closing means includes a first valve member that opens and closes the first communication part, a second valve member that opens and closes the second communication part, and a drive device that drives the first and second valve members,
The drive device operates the first valve member to open the first communication part and closes the second valve member to close the second communication part when the temperature state of the oil is lower than a predetermined temperature. On the other hand, when the temperature state of the oil is equal to or higher than a predetermined temperature, the first valve member is operated to close the first communication portion, and the second valve member is opened to open the second communication portion. An oil filtration device characterized by being operated. The oil filtration device according to claim 4,
The opening / closing means includes a valve member integrally formed with a first valve body that opens and closes the first communication portion and a second valve body that opens and closes the second communication portion, and a drive device that drives the valve member,
When the temperature state of the oil is lower than a predetermined temperature, the drive device opens the first communication part by the first valve body and closes the second communication part by the second valve body when the oil temperature is lower than a predetermined temperature. On the other hand, when the temperature state of the oil is equal to or higher than a predetermined temperature, the valve member is closed by the first valve body, the first communication portion is closed, and the second communication portion is used by the second valve body. An oil filtration device that is operated to open. An oil pan body in which oil circulating through the power unit is stored;
In an oil pan provided in the oil pan main body, and comprising an oil filtering device configured to filter the oil stored in the oil pan main body and supply the oil to the power unit,
The oil filtering device includes an oil receiving portion for receiving return oil that has returned through circulation through the power unit, an oil distribution pipe portion into which oil received by the oil receiving portion is introduced, and the oil distribution tube A filter for filtering oil flowing in the oil circulation pipe part,
On the upstream side of the filter of the oil circulation pipe part, an oil suction part for sucking oil into the oil circulation pipe part is provided below the oil level of the oil stored in the oil pan body. ,
An oil pan, wherein a downstream portion of the oil circulation pipe portion is connected to an oil suction portion of the power unit.

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