JP5906833B2 - Lubrication device - Google Patents

Description

  The present invention relates to a lubricating device for lubricating a member to be lubricated in an internal combustion engine.

  The reciprocating internal combustion engine converts the piston's forward / backward movement caused by the explosion of fuel in the combustion chamber into the rotational movement of the crankshaft, which is then transferred to the camshaft via a transmission mechanism such as a timing chain. Communicating. The intake valve and the exhaust valve are opened and closed by the rotational movement of the camshaft. Thus, the internal combustion engine includes a plurality of sliding parts in order to convert the forward / backward movement of the piston into the opening / closing movement of the intake valve and the exhaust valve. These sliding parts are lubricated members that need to be lubricated. For this reason, the internal combustion engine includes a lubricating device. The lubricating device sucks up the lubricating liquid stored in the oil pan provided at the lower end of the cylinder block with an oil pump and supplies it to the member to be lubricated.

  On the other hand, when the internal combustion engine is at a low temperature, it is required to raise the temperature of the internal combustion engine early. In order to warm up the internal combustion engine, it has been proposed to quickly raise the temperature of the lubricating liquid supplied to each part in the internal combustion engine. It has been proposed that the oil pan has a two-tank structure as a means for raising the temperature of the lubricating liquid at an early stage.

  The lubricating liquid in one tank is heated by supplying the lubricating liquid in one of the two tanks to the member to be lubricated and returning the supplied lubricating liquid to one again. That is, when the temperature of the lubricating liquid is low, the entire lubricating liquid is not supplied to the member to be lubricated, but only the lubricating liquid in one tank is circulated so that this part of the lubricating liquid is The temperature rises in response to the heat of the lubricating member. Then, by circulating a part of the lubricating liquid, the circulating lubricating liquid is heated up early.

  As the two-tank structure, an inner oil pan is provided in the oil pan so that the oil pan has two tanks (see, for example, Patent Document 1), or two tanks are provided by providing a partition wall in the oil pan. A structure (for example, see Patent Document 2) is proposed. In the structures of Patent Documents 1 and 2, the inside of the oil pan is divided into two tanks along its longitudinal direction.

  Further, in Patent Documents 1 and 2, a valve such as a thermo valve is provided in a communication hole formed in a wall portion that partitions two tanks of an oil pan divided into two tanks, and the temperature of the lubricating liquid rises. Then, the two tanks communicate with each other, and the lubricating liquid in the tank in which the low temperature lubricating liquid is stored flows into the tank in which the high temperature lubricating liquid is stored.

JP 2006-207521 A JP 2001-123813 A

  As in Patent Documents 1 and 2, when the low-temperature lubricating liquid flows into the tank in which the high-temperature lubricating liquid is stored, the low-temperature lubricating liquid is sucked out by the oil screen, and the lubricated member of the internal combustion engine Can be supplied. In this case, even if the temperature of the lubricating liquid stored in one of the two tanks is increased at an early stage, the internal combustion engine is warmed up by supplying the lubricating liquid having a low temperature to the lubricated member. It can be a long time.

  An object of the present invention is to provide a lubricating device that can further promote warm-up of an internal combustion engine.

The lubricating device according to claim 1 is provided below a cylinder block of the internal combustion engine, and stores a lubricating liquid storage portion that stores a lubricating liquid that lubricates a lubricated member of the internal combustion engine, and a lubricating liquid in the lubricating liquid storage portion. Is connected to the pump, an inner wall portion that divides the lubricating liquid storage portion into a first lubricating liquid storage chamber and a second lubricating liquid storage chamber, and the pump. A suction port for sucking out the lubricating liquid in the lubricating liquid storage chamber, a communication path that is provided in the inner wall portion and communicates with the first lubricating liquid storage chamber and the second lubricating liquid storage chamber; and Provided is a communication state variable means for switching between a communication state and a non-communication state between the first lubricating liquid storage chamber and the second lubricating liquid storage chamber; and lubrication from the communication port of the suction port an inflow amount limiting means for limiting a liquid inflow, the said communicating passage At least a portion of the bottom of the first lubricant storing chamber located between the inlet, and a recess which is recessed below the bottom of the surrounding.

  According to a second aspect of the present invention, there is provided the lubricating device according to the first aspect, wherein the inflow amount limiting means is disposed between the suction port and the communication state varying means, and is a bottom portion of the first lubricating liquid storage chamber. It is the protrusion part which protrudes upwards from.

In the lubricating device according to claim 3 , in the description of claim 1 or 2 , the lubricating liquid storage portion is disposed on the inner pan that forms the first lubricating liquid storage chamber on the inner side, and on the outer side of the inner pan. An outer pan that forms the second lubricating liquid storage chamber between the inner pan and the inner pan. The inner wall portion is a side wall portion of the inner pan. The bottom of the inner pan and the bottom of the outer pan are in contact. The inflow amount limiting means is a rib formed by bending the bottom of the inner pan toward the first lubricating liquid storage chamber. A gap communicating with the second lubricant storage chamber is formed between the rib and the bottom of the outer pan.

  In the present invention, since the inflow amount restricting means for restricting the inflow of the lubricating liquid to the suction port on the communication state varying means side from the suction port for sucking out the lubricating liquid is provided, the second lubricating liquid reservoir is stored immediately before the warm-up is completed. It is possible to prevent the low-temperature lubricating liquid flowing in from the chamber from being sucked directly, and to further promote warm-up of the internal combustion engine.

A sectional view showing an internal-combustion engine provided with a lubrication device concerning one embodiment of the present invention. FIG. 2 is a cross-sectional view of the internal combustion engine shown cut along a line F2-F2 shown in FIG. The top view which shows the oil pan of the internal combustion engine. Sectional drawing of the same oil pan shown along the F4-F4 line shown by FIG. Sectional drawing of the oil pan shown along F5-F5 line shown by FIG. FIG. 5 is a cross-sectional view showing the thermo valve of the lubricating device and its surroundings in the cross-sectional view shown in FIG. 4. The perspective view which expands and shows the circumference | surroundings of the part in which the communicating hole is formed in the surrounding wall part of the inner oil pan of the oil pan. The perspective view which shows the plate of the lubrication device. Explanatory drawing which shows the operation | movement at the time of fixing the thermo valve to the surrounding wall part. Explanatory drawing which shows the operation | movement at the time of fixing the thermo valve to the surrounding wall part.

  A lubrication apparatus according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view showing an internal combustion engine 10 including the lubricating device of the present embodiment. FIG. 1 shows a state in which the internal combustion engine 10 is cut in a direction perpendicular to an axis X of a crankshaft 30 described later. The vertical direction of the internal combustion engine 10 is the same as the vertical direction of the device in which the internal combustion engine 10 is mounted. In the present embodiment, the internal combustion engine 10 is mounted on an automobile as an example. For this reason, in the present embodiment, the vertical direction A of the internal combustion engine 10 is the vertical direction of the vehicle body of the automobile.

  As shown in FIG. 1, the internal combustion engine 10 is a reciprocating internal combustion engine in the present embodiment. The internal combustion engine 10 is a DOHC (Over Head Double Camshaft) type as an example. 2 is a cross-sectional view of the internal combustion engine 10 taken along line F2-F2 shown in FIG. FIG. 2 shows a state in which the internal combustion engine 10 is cut along an axis X of a crankshaft 30 described later.

  As shown in FIGS. 1 and 2, the internal combustion engine 10 includes a cylinder block 20, a crankshaft 30, a cylinder head 40, a pair of camshafts 50, a cylinder head cover 60, a transmission mechanism 70, and a chain case 80. The oil pump 90 and the oil pan 100 are provided.

  As shown in FIG. 2, the internal combustion engine 10 of this embodiment is a three-cylinder type as an example. The cylinder block 20 includes a cylinder part 22 in which three cylinders 21 are formed, and a crankcase 23 provided below the cylinder part 22. The cylinder part 22 and the crankcase 23 are integrally formed. The cylinder head 40 is fixed on the cylinder block 20. The cylinder head cover 60 is fixed on the cylinder head 40. A combustion chamber 41 is formed in a portion of the cylinder head 40 that faces the cylinder 21.

  A piston is accommodated in the cylinder 21. The piston 11 is connected to the crankshaft 30 by a connecting rod 12. In FIG. 2, the crankshaft 30 is partially omitted. The crankshaft 30 is rotatably supported by a journal receiving portion 24 provided with a crank journal 31 in the cylinder block 20. The crankshaft 30 rotates around the axis line X by the forward / backward movement of the piston 11 in the cylinder 21 being transmitted by the connecting rod 12.

  As shown in FIG. 1, a pair of camshafts 50 are provided in the cylinder head 40. Both camshafts 50 are arranged such that their respective axis lines Y are parallel to the axis line X of the crankshaft 30.

  As described above, the internal combustion engine 10 is a DOHC type. For this reason, one camshaft 50 drives an intake valve, and the other camshaft 50 drives an exhaust valve. The intake valve opens and closes an intake port formed in the combustion chamber 41 by being driven by the camshaft 50. The exhaust valve opens and closes an exhaust port formed in the combustion chamber 41 by being driven by the camshaft 50.

  The rotation of the crankshaft 30 is transmitted to each camshaft 50 by the transmission mechanism 70. Each camshaft 50 rotates by the rotation of the crankshaft 30 transmitted through the transmission mechanism 70, and opens and closes the intake valve and the exhaust valve.

  The transmission mechanism 70 includes a crankshaft timing sprocket 71, a camshaft timing sprocket 72, and a timing chain 73. A crankshaft timing sprocket 71 is provided at one end of the crankshaft 30. The crankshaft timing sprocket 71 is fixed to the crankshaft 30 and rotates integrally with the crankshaft 30.

  A camshaft timing sprocket 72 is provided at one end of each camshaft 50. The camshaft timing sprocket 72 is fixed to the camshaft 50 and rotates integrally with the camshaft 50. The timing chain 73 is turned around the crankshaft timing sprocket 71 and each camshaft timing sprocket 72. A part of the timing chain 73 is omitted. The rotation of the crankshaft 30 is transmitted in the order of the crankshaft timing sprocket 71, the timing chain 73, the camshaft timing sprocket 72, and the camshaft 50.

  The chain case 80 is provided on the side surface on the crankshaft timing sprocket 71 and the camshaft timing sprocket 72 side in the cylinder block 20 and the cylinder head 40, and the crankshaft timing sprocket 71, the camshaft timing sprocket 72, and the timing chain 73 are provided. Are accommodated between the cylinder block 20 and the cylinder head 40. In other words, an accommodation space S for accommodating the transmission mechanism 70 is formed between the cylinder block 20, the cylinder head 40, and the chain case 80. The lower end of the accommodation space S is open.

  In the cylinder block 20, an oil pump 90 is provided on one end side of the crankshaft 30 in the transmission mechanism 70 as an example in the present embodiment. The oil pump 90 is driven by rotation of the crankshaft 30, for example, a trochoid type.

  An oil gallery 110 through which oil O as an example of a lubricating liquid flows is provided in the cylinder portion 22. The oil gallery 110 has an oil hole 111 that communicates with the journal receiver 24. A part of the oil O flowing in the oil gallery 110 flows out of the cylinder part 22 through the oil hole 111. The oil O that has flowed out lubricates between the journal receiving portion 24 and the crank journal 31.

  The oil gallery 110 is also provided in the cylinder head 40. The oil gallery 110 passing through the cylinder head 40 lubricates various sliding portions in the cylinder head 40. The oil gallery 110 formed in the cylinder head 40 is formed so as to pass around the combustion chamber 41. The oil O flowing through the oil gallery 110 in the cylinder head 40 flows around the combustion chamber 41, receives the high temperature of the combustion chamber 41, and is heated immediately after the internal combustion engine 10 is driven.

  The oil gallery 110 formed in the cylinder head 40 is formed with an oil dropping passage 112 for dropping the oil O toward an oil pan 100 described later. In the cylinder portion 22 of the cylinder block 20, an oil drop passage 113 communicating with an oil drop passage 112 formed in the cylinder head 40 is formed.

  1 shows a pair of oil drop passages 112 and 113, the oil drop passages 112 and 113 are also formed in the cylinder block 20 and the cylinder head 40 at portions different from those in FIG. ing. That is, a plurality of oil dropping passages 112 and 113 are formed.

  An opening 114 at the lower end of the oil dropping passage 113 formed in the cylinder portion 22 is opened in the crankcase 23. For this reason, the opening 114 of the oil dropping passage 113 is located inside the crankcase 23 with respect to the inner wall surface 23 a of the crankcase 23. The oil O that has flowed through the oil gallery 110 in the cylinder head 40 and has been heated at an early stage due to the temperature of the combustion chamber 41 falls through the oil drops 112 and 113. Since the opening 114 is positioned inside the inner wall surface 23a of the crankcase 23, the oil O that has dropped through the opening 114 does not travel along the inner wall surface 23a.

  The oil pump 90 pumps up oil O in an oil pan 100 described later, and supplies the oil O to the oil gallery 110 and the transmission mechanism 70.

  An oil pan 100 is fixed to the lower end of the crankcase 23 of the cylinder block 20. The oil pan 100 includes an outer oil pan 105 and an inner oil pan 120.

  The outer oil pan 105 has a bottomed shape with an upper end opened, and includes a bottom wall portion 101 and a peripheral wall portion 102 that rises from the periphery of the bottom wall portion 101. The peripheral wall portion 102 is fixed to the lower end of the crankcase 23 and the lower end of the chain case 80 with a sealing material through the upper end edge so that the oil O does not leak. For this reason, the inner wall surface 23 a of the crankcase 23 and the inner wall surface 103 of the peripheral wall portion 102 of the oil pan 100 are continuous. The opening at the upper end of the oil pan 100 has a size that overlaps the lower end opening of the crankcase 23 and the accommodating space between the cylinder head 40 and the chain case 80 in the vertical direction A.

  FIG. 3 is a plan view showing the oil pan 100. FIG. 4 is a cross-sectional view of oil pan 100 shown along line F4-F4 shown in FIG. In FIG. 4, an oil screen 170 described later is not cut.

  As shown in FIGS. 3 and 4, an inner oil pan 120 is provided in the outer oil pan 105. The inner oil pan 120 has a bottomed shape with an open upper end, and includes a bottom wall 121 and a peripheral wall 122 that rises from the periphery of the bottom wall 121.

  The bottom wall 121 of the inner oil pan 120 is fixed to the bottom wall 101 of the oil pan 100. As this fixing method, for example, it may be fixed by welding. The peripheral wall portion 122 of the inner oil pan 120 is located on the inner side of the peripheral wall portion 102 of the oil pan 100, and the entire upper end edge 123 of the peripheral wall portion 122 of the inner oil pan 120 is within the peripheral wall portion 102 of the oil pan 100. It is separated from the wall surface 103 and the inner wall surface 23a of the crankcase 23.

  Therefore, the inner side of the outer oil pan 105 is partitioned into a first oil storage chamber 131 and a second oil storage chamber 132 by the peripheral wall portion 122 of the inner oil pan 120. The second oil storage chamber 132 is a space between the peripheral wall portion 102 of the oil pan 100 and the peripheral wall portion 122 of the inner oil pan 120. The second oil storage chamber 132 is formed in an annular shape that surrounds the inner oil pan 120 and is continuous around the circumference. The first oil storage chamber 131 is inside the inner oil pan 120.

  As shown in FIG. 1, the entire region of the upper end edge 123 of the peripheral wall portion 122 of the inner oil pan 120 is located in the vertical direction A outside the openings 114 of all the oil drops 113 formed in the cylinder portion 22. Yes. The outside here means that when the opening 114 of the oil drop 113 is extended in the vertical direction A, the extension of the entire area of the edge of the opening 114 is located inside the upper edge 123 of the peripheral wall 122 of the inner oil pan 120. It is. In other words, in each opening 114, the entire range of the opening 114 is located inside the first oil storage chamber 131 with respect to the upper end edge 123 of the peripheral wall portion 122.

  The peripheral wall portion 122 of the inner oil pan 120 is fixed by being connected to the peripheral wall portion 102 of the oil pan 100 by a plurality of brackets 140. FIG. 5 is a cross-sectional view of oil pan 100 shown along line F5-F5 shown in FIG. FIG. 5 shows a state in which the oil pan 100 is cut along a direction perpendicular to the axis X of the crankshaft 30.

  As shown in FIG. 5, the bracket 140 is formed integrally with the peripheral wall portion 122 of the inner oil pan 120. The bracket 140 extends downward from the upper end edge 123 of the peripheral wall portion 122 and then extends toward the inner wall surface 103 of the oil pan 100 and is fixed to the inner wall surface 103. In other words, the bracket 140 is provided below the upper end edge 123 of the peripheral wall portion 122 of the inner oil pan 120. The upper end edge 123 is a portion at the highest position along the up-down direction A in the peripheral wall portion 122.

  In the present embodiment, the bracket 140 is formed integrally with the peripheral wall portion 122 of the inner oil pan 120. However, for example, the bracket may be a separate member from the inner oil pan 120. Even when the bracket is a separate member from the peripheral wall portion 122 of the inner oil pan 120, the bracket is positioned below the upper edge 123 of the peripheral wall portion 122 of the inner oil pan 120 as shown in FIG.

  The brackets 140 are provided at a plurality of locations on the peripheral wall portion 122 of the inner oil pan 120. A bracket 140 shown in FIG. 5 is a bracket formed at a portion along the direction in which the axis X of the crankshaft 30 extends in the peripheral wall portion 122 of the inner oil pan 120.

  As shown in FIG. 4, the bracket 140 provided in a portion along the direction perpendicular to the direction in which the axis X of the crankshaft 30 extends in the peripheral wall portion 122 of the inner oil pan 120 is also similar to the bracket 140 shown in FIG. 5. It is located below the upper edge 123 of the peripheral wall 122. Thus, as shown in FIG. 5, all the brackets 140 are provided below the upper end edge 123 of the portion where the bracket 140 is provided in the peripheral wall portion 122 of the inner oil pan 120.

  In the inner oil pan 120, an oil receiving portion 150 is provided on the other end side along the axis X direction of the crankshaft 30. The oil receiving part 150 is formed by a part of the peripheral wall part 122 extending gently upward toward the inner wall surface 103 of the oil pan 100. In other words, portions other than the oil receiving portion 150 in the peripheral wall portion 122 of the inner oil pan 120 extend in the vertical direction A.

  The oil receiving part 150 is inclined so as to gently descend from the outer edge thereof toward the inside of the first oil storage chamber 131. For this reason, the oil O dropped on the oil receiver 150 is guided by the oil receiver 150 and guided into the first oil storage chamber 131.

  Since the oil receiving part 150 is a part of the peripheral wall part 122, the outer edge of the oil receiving part 150 is the same part as the upper end edge 123 of the peripheral wall part 122. For this reason, the outer edge, that is, the upper end edge of the oil receiving portion 150 is separated from the inner wall surface 103 of the peripheral wall portion 102 of the oil pan 100.

  In the present embodiment, as shown in FIG. 3, the inner oil pan 120 has a substantially rectangular planar shape, and an oil receiving portion 150 is formed on one of the four sides. The bracket 140 is formed on the upper end edge 123 of the oil receiving portion 150 and at least one on each of the remaining three sides. For example, three brackets 140 are formed on the upper edge 123 of the oil receiver 150. Two brackets 140 are formed at portions of the peripheral wall portion 122 along the direction in which the axis X of the crankshaft 30 extends. One bracket 140 is formed at a portion of the peripheral wall portion 122 that faces the oil receiving portion 150. By forming the bracket 140 as described above, the inner oil pan 120 is firmly fixed to the oil pan 100.

  A thermo valve 160 is provided at a portion of the peripheral wall portion 122 of the inner oil pan 120 where the oil receiving portion 150 is formed. A communication hole 161 that penetrates the peripheral wall part 122 is formed in the peripheral wall part 122, and a thermo valve 160 is provided in the communication hole 161.

  FIG. 6 is a cross-sectional view showing the thermo valve 160 and the periphery thereof. In FIG. 6, the thermo valve 160 is cut along the advancing / retreating direction of the valve portion 162. As shown in FIG. 6, the thermo valve 160 includes a valve portion 162 and a thermostat 163 in the present embodiment.

  The valve part 162 closes the communication hole 161. In the state in which the valve portion 162 is closed, the communication hole 161 is closed in a liquid-tight manner. Therefore, the oil O accumulated in the second oil storage chamber 132 passes through the communication hole 161 and the first hole is closed. The oil does not flow into the oil storage chamber 131.

  The thermostat 163 is integrally provided at one end portion of the valve portion 162. The thermostat 163 is exposed in the second oil storage chamber 132. The thermostat 163 opens and closes the valve portion 162 according to the temperature. In this embodiment, the thermostat 163 is, for example, a wax type. Wax is accommodated in the thermostat 163. The wax has a property of melting when the temperature exceeds the predetermined temperature and solidifying when the temperature is lower than the predetermined temperature. A part of the valve portion 162 is accommodated in the wax.

  As the wax in the thermostat 163 melts, the volume of the wax increases. Therefore, the valve portion 162 is pushed out from the thermostat 163 and moves in a direction to open the communication hole 161. As a result, the communication hole 161 is opened, and therefore the oil in the second oil storage chamber 132 flows into the first oil storage chamber 131 through the communication hole 161.

  As described above, when the temperature of the thermostat 163 becomes equal to or higher than the predetermined temperature, the thermostat 163 is driven to open the communication hole 161. If the temperature of the thermostat 163 is lower than a predetermined temperature, the wax is solidified, so the thermostat 163 is not driven, and therefore the valve 162 is maintained in a state where the communication hole 161 is closed.

  As described above, the thermostat 163 that is the temperature sensing part of the thermo valve 160 is located below the oil receiving part 150. Therefore, the oil O that has fallen on the oil receiving portion 150 flows on the oil receiving portion 150 and touches the thermostat 163, that is, the thermo valve 160 in the process of falling into the first oil storage chamber 131.

  An oil screen 170 that guides the oil O in the first oil storage chamber 131 to the oil pump 90 is provided in the first oil storage chamber 131. The oil screen 170 includes a suction portion 171 that faces the bottom wall portion 121 of the inner oil pan 120, and a pipe portion 172 that communicates the inside of the suction portion 171 and the oil pump 90.

  In the suction portion 171, a wire mesh that prevents large dust in the oil O from being sucked into the oil pump 90 is provided. The suction portion 171 has a suction port 173 that faces the bottom wall portion 121. As shown in FIG. 3, the suction portion 171 has a circular planar shape and is larger than the cross section of the pipe portion 172. The suction port 173 has substantially the same size as the planar shape of the suction part 171. For this reason, the suction port 173 of the suction part 171 is larger than the cross section of the pipe part 172. This is to efficiently guide the oil O accumulated at the bottom in the first oil storage chamber 131 to the oil pump 90. In FIG. 4, one end of the suction port 173 of the suction portion 171 on the thermo valve 160 side is denoted by reference sign Q, and the other end is denoted by reference sign W along the direction in which the axis X of the crankshaft 30 extends with respect to one end Q. Attached. The one end Q and the other end W are positions shifted from each other by 180 degrees at the suction port 173. In the present embodiment, the planar shape of the suction port 173 is a circle passing through one end Q and the other end W.

  One end opening 172 a of the pipe portion 172 communicates with the suction portion 171, and the other end opening 172 b communicates with the oil pump 90. The negative pressure generated by the oil pump 90 acts on the suction part 171 via the pipe part 172. As a result, the oil O in the first oil storage chamber 131 is guided to the oil pump 90 via the oil screen 170.

  As described above, the oil pump 90 is provided on one end side along the axis X of the crankshaft 30 in the cylinder block 20. The thermo valve 160 is provided on the opposite side of the oil pump 90 along the axis X in the peripheral wall portion 122 of the inner oil pan 120. For this reason, the pipe part 172 does not overlap the thermo valve 160 in the vertical direction A.

  As shown in FIGS. 3 and 4, a first rib 124 is formed between the thermo valve 160 and the suction port 173 of the suction part 171 of the oil screen 170 in the bottom wall part 121 of the inner oil pan 120. . A second rib 125 is formed on the opposite side of the suction portion 171 from the first rib 124.

  The first rib 124 is formed by bending the bottom wall portion 121 of the inner oil pan 120 upward, and protrudes upward. The first rib 124 extends along a direction perpendicular to the axis X of the crankshaft 30 and extends from one end to the other end of the bottom wall portion 121 along the perpendicular direction. One end 124 a and the other end 124 b of the first rib 124 are open to the second oil storage chamber 132, respectively.

  As described above, the first rib 124 is formed by bending the bottom wall portion 121 of the inner oil pan 120 upward. For this reason, a first gap D <b> 1 is formed between the bottom wall portion 101 of the outer oil pan 105 and the first rib 124. Then, both ends 124a and 124b of the first gap D1 open to the second oil storage chamber 132, respectively. Therefore, both sides of the second oil storage chamber 132 sandwiching the first oil storage chamber 131 in the direction perpendicular to the axis X of the crankshaft 30 are the bottom wall portion 101 of the outer oil pan 105 and the first rib 124. And communicate with each other through a first gap D1 formed therebetween.

  As shown in FIG. 4, the apex of the first rib 124 is higher than the suction port 173 of the suction portion 171. That is, the height h 1 of the first rib 124 with respect to the bottom wall portion 121 of the inner oil pan 120 is higher than the height h 2 of the suction port 173 with respect to the bottom wall portion 121.

  The second rib 125 is formed by bending the bottom wall portion 121 of the inner oil pan 120 upward, and protrudes upward. The second rib 125 extends along a direction perpendicular to the axis X of the crankshaft 30 and extends from one end of the bottom wall 121 to the other end along the perpendicular direction. Then, one end 125 a and the other end 125 b of the second rib 125 open to the second oil storage chamber 132, respectively.

  As described above, the second rib 125 is formed by bending the bottom wall portion 121 of the inner oil pan 120 upward. For this reason, a second gap D <b> 2 is formed between the bottom wall portion 101 of the outer oil pan 105 and the second rib 125. Then, both ends 125a and 125b of the second gap D2 are opened to the second oil storage chamber 132, respectively. Therefore, both sides of the second oil storage chamber 132 sandwiching the first oil storage chamber 131 in the direction perpendicular to the axis X of the crankshaft 30 are the bottom wall portion 101 of the outer oil pan 105 and the second rib 125. Communicating through the second gap D2 formed between the two.

  As shown in FIG. 4, the apex of the second rib 125 is higher than the suction port 173 of the suction portion 171. That is, the height h 3 of the second rib 125 with respect to the bottom wall 121 of the inner oil pan 120 is higher than the height h 2 of the suction port 173 with respect to the bottom wall 121.

FIG. 7 is an enlarged perspective view showing the periphery of the portion where the communication hole 161 is formed in the peripheral wall portion 122 of the inner oil pan 120. In FIG. 7, the peripheral wall 122 is viewed from the inside of the first oil storage chamber 131. As shown in FIGS. 4 and 7, a recess 126 that is recessed downward is formed in a portion of the bottom wall portion 121 of the inner oil pan 120 that is positioned below the communication hole 161. The recess 126 is recessed below the periphery of the recess 126 in the bottom wall portion 121. Further, as shown in FIG. 4, a portion of the bottom wall portion 101 of the outer oil pan 105 that faces the recess 126 is recessed downward along the recess 126. The recess 126 can store a part of the oil O that flows from the second oil storage chamber 132 into the first oil storage chamber 131 through the communication hole 161.

  Next, a structure for attaching the thermo valve 160 to the peripheral wall 122 of the inner oil pan 120 will be described. As described above, the thermo valve 160 is a temperature sensing unit, and the thermostat 163 that drives the valve unit 162 and the valve unit 162 are integrally configured. The thermo valve 160 includes a flange portion 164 that projects outward in the direction perpendicular to the advancing / retreating direction Z of the valve portion 162.

  The flange portion 164 is larger than the communication hole 161. The thermo valve 160 passes through the communication hole 161 from the first oil storage chamber 131 side to the second oil storage chamber 132 side so that the thermostat 163 is located in the first oil storage chamber 131.

  At this time, since the flange portion 164 is larger than the communication hole 161, the flange portion 164 contacts the edge of the communication hole 161. The flange portion 164 is fixed to the peripheral wall portion 122 by the plate 165 while being sandwiched between the plate 165 and the peripheral wall portion 122.

  FIG. 8 is a perspective view showing the plate 165. The plate 165 has an annular shape in which a through hole 166 through which the thermo valve 160 is passed is formed. As shown in FIG. 5, the thermo valve 160 is formed with an overhang portion 167 that projects in the circumferential direction. The through-hole 166 has a recess 168 into which the overhang 167 is fitted. The plate 165 has a size that comes into contact with the flange portion 164 when the thermo valve 160 is passed through the inner through-hole 166.

  As shown in FIG. 7, a plate stopper 127 is formed around the communication hole 161 in the peripheral wall 122. In the present embodiment, as an example, plate stoppers 127 are formed around the communication hole 161 at three positions spaced about the center C of the communication hole 161 at equal intervals.

  The plate stopper 127 is formed by forming a slit 128 penetrating the peripheral wall 122 in a part of the peripheral wall 122 and raising the portion that becomes the plate stopper 127 in the peripheral wall 122 toward the first oil storage chamber 131. Has been. The slit 128 is formed only on one side around the center C of the communication hole 161 with respect to the plate stopper 127.

  An engaging piece 169 that engages with the plate stopper 127 is formed on the plate 165. The engaging piece 169 protrudes outward in the circumferential direction, and enters the slit 128 of the plate stopper 127. The engagement pieces 169 are formed at three locations according to the plate stoppers 127. The slit 128 has such a size that the engagement piece 169 fits therein. Each engagement piece 169 is formed with a protrusion 169a that protrudes toward the second oil storage chamber 132 side. A through hole 127 a is formed in the plate stopper 127. The through-hole 127a is a portion into which the protrusion 169a fits when the engagement piece 169 passes through the slit 128 and reaches the state shown in FIG. The through hole 127a has a slightly smaller shape than the protrusion 169a.

  9 and 10 show the operation when the thermo valve 160 is fixed to the peripheral wall portion 122. First, the thermo valve 160 is passed through the through hole 166 of the plate 165. At this time, the overhanging portion 167 of the thermo valve 160 is accommodated in the concave portion 168 of the plate 165. As a result, the plate 165 is fixedly fixed to the thermo valve 160.

  Next, as shown in FIG. 9, the thermo valve 160 to which the plate 165 is integrally fixed is passed from the first oil storage chamber 131 toward the second oil storage chamber 132 side. In the state shown in FIG. 9, the flange portion 164 of the thermo valve 160 is sandwiched between the plate 165 and the peripheral wall portion 122.

  Subsequently, as shown in FIG. 10, when the thermo valve 160 is rotated around the center C of the communication hole 161, the engagement piece 169 of the plate 165 fixed to the thermo valve 160 integrally forms the slit 128 of the plate stopper 127. Pass through. Further, the engaging piece 169 is fixed to the plate stopper 128 by fitting the protrusion 169a of the engaging piece 169 into the through hole 127a. In addition, since the slit 128 is not formed in the edge portion 129b opposite to the slit 128 in the plate stopper 127, even if the thermo valve 160 is further rotated from the state in which the projection 169a is fitted in the through hole 127a, the engagement is stopped. When the joining piece 169 contacts the edge portion 129b, the thermo valve 160 does not further rotate. As described above, the thermo valve 160 is fixed to the peripheral wall portion 122 by the above operation.

  Next, the relationship between the recess 126 and the thermo valve 160 will be described. FIG. 5 shows a state where the periphery of the recess 126 is cut. As shown in FIG. 5, the recess 126 is formed below the communication hole 161. The recess 126 is formed in an arc shape with the center C of the communication hole 161 as a rotation center, and can accommodate a part of the flange portion 164 of the thermo valve 160. Since the concave portion 126 has an arc shape and the planar shape of the plate 165 is a circle, the thermo valve 160 is rotated around the center C of the communication hole 161 from the state of FIG. Even so, the thermo valve 160 and the plate 165 do not contact the recess 126. Since a part of the flange portion 164 and a part of the plate 165 can be accommodated in the recess 126, the position of the thermo valve 160 can be lowered, in other words, the position of the communication hole 161 can be lowered.

  Next, the flow of oil O in the internal combustion engine 10 will be described. As shown in FIG. 1, the oil O in the first oil storage chamber 131 sucked in by the oil pump 90 is discharged into the oil gallery 110. First, part of the oil O flowing in the oil gallery 110 formed in the cylinder portion 22 flows out through the oil hole 111. The oil O that has flowed out lubricates between the crank journal 31 and the journal receiver 24.

  The oil O lubricated between the crank journal 31 and the journal receiving portion 24 is scattered around by the rotation of the crankshaft 30. As shown in FIG. 1, the oil O scattered to the periphery adheres to the inner wall surface 23 a of the crankcase 23 and falls along the inner wall surface 23 a.

  The inner wall surface 23 a of the crankcase 23 is continuous with the inner wall surface 103 of the oil pan 100. For this reason, the oil O that flows down along the inner wall surface 23 a of the crankcase 23 travels along the inner wall surface 103 of the outer oil pan 105 to the second oil reservoir chamber between the outer oil pan 105 and the inner oil pan 120. It falls in 132 and accumulates.

  Immediately after the internal combustion engine 10 is driven, the temperature of the oil O in the first oil storage chamber 131 is substantially the same as the ambient temperature, that is, the temperature of the atmosphere, and the temperature is low. Further, the temperature of the internal combustion engine 10 is low immediately after driving. For this reason, the oil O that flows out from between the crank journal 31 of the crankshaft 30 and the journal receiving portion 24 and adheres to the inner wall surface 23a of the crankcase 23 and flows down along the inner wall surface 23a remains in a low temperature state. is there.

  Part of the oil O that has fallen along the inner wall surface 23 a of the crankcase 23 adheres to the bracket 140. As shown in FIG. 5, the bracket 140 is positioned below the upper end edge 123 of the peripheral wall portion 122 of the inner oil pan 120. For this reason, the low-temperature oil O that falls along the inner wall surface 23 a of the crankcase 23 does not enter the first oil storage chamber 131 through the bracket 140 even if it falls on the bracket 140.

  The oil O flowing through the oil gallery 110 formed in the cylinder head 40 falls through an oil drop 112 formed in the cylinder head 40 and an oil drop 113 formed in the cylinder part 22. All the openings 114 at the lower end of the oil drop 113 formed in the cylinder portion 22 are located inside the inner wall surface 23 a of the crankcase 23. For this reason, the oil O falling through the opening 114 falls into the first oil storage chamber 131 without passing through the inner wall surface 23 a of the crankcase 23.

  The oil O falling through the opening 114 is heated by the combustion chamber 41 of the cylinder head 40 and heated. For this reason, even immediately after the internal combustion engine 10 is driven, the temperature of the oil O that returns to the first oil storage chamber 131 is high.

  Further, a part of the oil O falling through the oil drop 113 falls on the oil receiving part 150. The oil O that has fallen on the oil receiver 150 flows down through the oil receiver 150 into the first oil storage chamber 131. At this time, the high oil O flowing down through the oil receiving portion 150 and flowing into the first oil storage chamber 131 adheres to the thermo valve 160 in the flow process. For this reason, the thermostat 163 is heated at an early stage even immediately after the internal combustion engine 10 is driven.

  The oil O in the first oil storage chamber 131 sucked up by the oil pump 90 is also supplied to the transmission mechanism 70 to lubricate the transmission mechanism 70. In the transmission mechanism 70, the timing chain 73 is turned around the crankshaft timing sprocket 71 and the camshaft timing sprocket 72 in order to transmit the rotation of the crankshaft 30 to the camshaft 50. Therefore, due to the friction between the crankshaft timing sprocket 71 and the timing chain 73 and the friction between the camshaft timing sprocket 72 and the timing chain 73, the temperature of the transmission mechanism 70 is increased immediately after the start of driving of the internal combustion engine 10. The temperature is raised. For this reason, the oil O supplied to the transmission mechanism 70 is heated quickly by lubricating the transmission mechanism 70.

  Here, in the peripheral wall part 122 of the inner oil pan 120, the part by the side of the transmission mechanism 70 is demonstrated concretely. In other words, the portion on the transmission mechanism 70 side in the peripheral wall portion 122 of the inner oil pan 120 is a portion on one end side along the axis X of the crankshaft 30 in the peripheral wall portion 122 of the inner oil pan 120.

  As shown in FIG. 2, the upper end edge 123 of the portion on the one end side along the axis X of the crankshaft 30 in the peripheral wall portion 122 of the inner oil pan 120 is higher in the vertical direction A than the timing chain 73 of the transmission mechanism 70. The peripheral wall portion 102 of the 100 is located on the inner wall surface 103 side. The timing chain 73 is an example of an endless rope.

  Here, the fact that the upper end edge 123 of the peripheral wall portion 122 is closer to the inner wall surface 103 of the peripheral wall portion 102 of the oil pan 100 than the timing chain 73 (endless rope) will be described. As described above, the upper edge of the outer oil pan 105 is connected to the lower ends of the crankcase 23 and the chain case 80 of the cylinder block 20. For this reason, a portion of the peripheral wall portion 122 that overlaps the accommodation space S in which the transmission mechanism 70 is accommodated is located outside the transmission mechanism 70 along the axis X of the crankshaft 30.

  In the present embodiment, the upper end edge 123 of the peripheral wall portion 122 is closer to the inner wall surface 103 side of the peripheral wall portion 102 of the oil pan 100 than the timing chain 73 (endless rope) is along the axis X of the crankshaft 30. From one end side to the other end side, in other words, from one end on the transmission mechanism side to the other end, the inner wall surface 103 of the peripheral wall portion 102 of the oil pan 100, the upper end edge 123 of the peripheral wall portion 122, the timing chain 73 Indicates that they are arranged in order.

  For this reason, the oil O that falls after lubricating the transmission mechanism 70 falls into the first oil storage chamber 131. As described above, the temperature of the oil O after lubricating the transmission mechanism 70 is raised by the transmission mechanism 70, and the temperature is high even immediately after the internal combustion engine 10 is driven.

  Further, since the thermostat 163 is quickly heated by the oil O having a high temperature flowing through the oil receiving portion 150, the temperature of the thermostat 163 quickly reaches a predetermined temperature that is a temperature for opening the valve portion 162.

  For this reason, the oil O having a lower temperature than the oil O in the first oil storage chamber 131 that has accumulated in the second oil storage chamber 132 enters the first oil storage chamber 131, so that the oil The temperature of the entire O is raised at an early stage.

The oil O that has flowed into the first oil storage chamber 131 through the communication hole 161 is stored in the recess 126. Furthermore, the first rib 124 is formed while the oil O that has flowed into the first oil storage chamber 131 through the communication hole 161 flows toward the suction port 173 of the suction portion 171 of the oil screen 170. The oil O that has flowed into the first oil storage chamber 131 through the communication hole 161 is unlikely to reach the suction port 173. In other words, the oil O introduced into the first oil reservoir chamber 131 through the communication hole 161 by the recess 126 and the first rib 124, the amount sucked by the suction port 173 is restricted.

  The oil O that has flowed into the first oil storage chamber 131 through the communication hole 161 has a lower temperature than the oil O originally stored in the first oil storage chamber 131. As described above, the oil O that has flowed into the first oil storage chamber 131 through the communication hole 161 is less likely to reach the suction port 173 by the concave portion 126 and the first rib 124. It is less supplied to each lubricated member.

  The oil O that has flowed into the first oil storage chamber 131 through the communication hole 161 is not immediately sucked into the suction port 173 by the concave portion 126 and the first rib 124, and the first oil for a while. It remains in the storage chamber 131. And while it stays, it mixes with high temperature oil O.

  A second rib 125 is formed on the opposite side of the first rib 124 with the suction port 173 interposed therebetween. Further, the first and second ribs 124 and 125 extend from one end to the other end of the bottom wall 121 of the inner oil pan 120. Furthermore, the positions of the apexes of the first ribs 124 and 125 are higher than the suction port 173. Therefore, the suction port 173 is surrounded by the first and second ribs 124 and 125.

  The oil O having a low temperature flowing through the communication hole 161 does not easily enter the range surrounded by the first and second ribs 124 and 125. For this reason, the region surrounded by the first and second ribs 124 and 125 is always filled with high-temperature oil, and therefore, the high-temperature oil O is sucked out through the suction port 173.

  As described above, the oil O whose temperature has become high after the inside of the internal combustion engine 10 is lubricated with the oil O returns to the first oil storage chamber 131, lubricates the crankshaft 30, and remains at a low temperature. Returns to the second oil storage chamber 132. For this reason, even immediately after the internal combustion engine 10 is driven, the temperature of the oil O stored in the first oil storage chamber 131 is raised early. Furthermore, the warm-up of the internal combustion engine 10 is further promoted by supplying the oil O whose temperature has been raised early to the lubricated member of the internal combustion engine 10 to be lubricated.

  Further, the low-temperature oil O that has flowed into the first oil storage chamber 131 through the communication hole 161 is less likely to reach the suction port 173 by the concave portion 126 and the first rib 124, so Since the low oil O is not supplied to the lubricated member, warm-up of the internal combustion engine 10 is further promoted.

  Further, since the oil O having a high temperature is sucked by the suction port 173 being surrounded by the first and second ribs 124 and 125, the warm-up of the internal combustion engine 10 is further promoted.

  Further, by using the first rib 124, it is possible to simply establish a structure that limits the amount of low-temperature oil O that has flowed from the communication hole 161 sucked out from the suction port 173. By forming a structure in the bottom wall portion 121 of the inner oil pan 120 to limit the amount of oil O sucked from the suction port 173, the oil screen 170 side passes through the communication hole 161 sucked from the suction port 173. Since it is not necessary to provide a structure for limiting the amount of low-temperature oil O that has flowed into one oil storage chamber 131, the shape of the oil screen 170 does not need to be changed, and the cost can be reduced. Furthermore, since the first rib 124 is formed on the bottom wall portion 121, it is not necessary to finely adjust the posture of the oil screen 170, so that the work efficiency of the oil screen 170 mounting operation is improved.

  In addition, since the first and second ribs 124 and 125 are formed by bending a part of the bottom wall 121, a conventional oil pan can be used as the outer oil pan 105. Cost can be reduced.

  By opening both ends 124a, 124b of the first rib 124 and both ends 125a, 125b of the second rib 125 into the second oil storage chamber 132, it is possible to ensure good merchandise of the oil pan 100. it can. This point will be specifically described.

  When the oil pan 100 is subjected to a rust preventive treatment such as black paint, the oil pan 100 is passed through a tank in which a rust preventive agent is stored. At this time, the rust preventive agent enters between the bottom wall portion 101 of the outer oil pan 105 and the bottom wall portion 121 of the inner oil pan 120. If the rust preventive agent that has entered between the bottom wall portions 101 and 122 remains as it is, the merchantability of the oil pan 100 deteriorates.

  However, first and second gaps D1 and D2 are formed between the first and second ribs 124 and 125 and the bottom wall portion 101 of the outer oil pan 105, and both ends 124a and 124b of the first gap D1. And the two ends 125a and 125b of the second gap D2 open into the second oil storage chamber 132, so that the rust preventive agent accumulated between the bottom wall portions 101 and 122 is contained in the first and second gaps D1 and D2. To the second oil reservoir 132 through both ends 124a, 124b, 125a, 125b.

  As a result, it is possible to suppress the surplus rust preventive agent from remaining between the bottom wall portions 101 and 122, and thus it is possible to ensure good merchantability of the oil pan 100.

  In addition, the position of the communication hole 161 can be lowered downward by using the recess 126 formed to limit the amount of low-temperature oil O that has flowed through the communication hole 161 reaching the suction port 173. . By lowering the position of the communication hole 161 downward, the oil O accumulated at the bottom of the second oil storage chamber 132 can flow into the first oil storage chamber 131. For this reason, since oil O which does not circulate through the internal combustion engine 10 is suppressed from being accumulated at the bottom of the second oil storage chamber 132, it is possible to suppress deterioration of the oil O at an early stage.

  Further, since the bottom wall 121 of the inner oil pan 120 is in contact with the bottom wall 101 of the outer oil pan 105, the inner oil pan 120 can be firmly fixed to the outer oil pan 105.

  Further, since the inner oil pan 120 is connected to the oil pan 100 by the bracket 140, the inner oil pan 120 is firmly fixed to the oil pan 100.

  Further, since the bracket 140 is located below the upper end edge 123 of the peripheral wall portion 122 of the inner oil pan 120, the oil O having a low temperature falling along the inner wall surface 23a of the crankcase 23 falls on the bracket 140. However, since the low-temperature oil O does not flow into the first oil storage chamber 131, the temperature rise of the oil O in the first oil storage chamber 131 is suppressed.

  In addition, by guiding the oil O that has been heated by the transmission mechanism 70 into the first oil storage chamber 131, warm-up of the internal combustion engine 10 can be further promoted.

  Further, the thermostat 163 is also provided below the oil receiving portion 150 by providing the thermo valve 160 below the oil receiving portion 150. The oil receiver 150 has a relatively large area, and therefore, the amount of oil O having a high temperature falling on the oil receiver 150 is large.

  Therefore, the temperature of the thermo valve 160 is raised quickly when the oil O having a high temperature is touched. In the present embodiment, the thermostat 163 is located in the second oil storage chamber 132, but when the entire thermo valve 160 is heated by the oil O, the thermostat 163 is also quickly heated. As a result, the low-temperature oil O in the second oil storage chamber 132 also flows into the first oil storage chamber 131 through the communication hole 161 at an early stage. The temperature can be raised.

  Further, the pipe portion 172 of the oil screen 170 does not overlap the thermo valve 160 in the vertical direction A. For this reason, the pipe part 172 does not prevent the oil O having a high temperature falling into the first oil storage chamber 131 from contacting the thermo valve 160. That is, early temperature rise of the temperature of the thermo valve 160 is promoted.

  In the present embodiment, the oil pan 100, the oil pump 90, the oil screen 170, the bracket 140, and the thermo valve 160 constitute an example of a lubrication device 180 that supplies oil O to each lubricated member. .

  In the present embodiment, the concave portion 126 is formed only in the bottom wall portion 121 of the inner oil pan 120 below the communication hole 161. As another example, it may be formed not only under the communication hole 161 but in a wider range. As this example, the recess 126 may be formed in the bottom wall portion 121 from one end to the other end along a direction perpendicular to the axis X of the crankshaft 30.

  In the present embodiment, the first rib 124 has a shape extending linearly from one end of the bottom wall portion 121 to the other end. As another example, it may be formed in an arc shape along the shape of the suction port 173 of the oil screen 170.

  In the present embodiment, the oil O is an example of a lubricating liquid that lubricates the lubricated member of the internal combustion engine. The crank journal 31 and the transmission mechanism 70 are examples of lubricated members. The oil pan 100 is an example of a lubricating liquid storage unit that stores a lubricating liquid.

The first oil storage chamber 131 is an example of a first lubricating liquid storage chamber, and the second oil storage chamber 132 is an example of a second lubricating liquid storage chamber. The peripheral wall portion 122 of the inner oil pan 120 is an example of an inner wall portion that divides the inside of the lubricating liquid storage portion into a first lubricating liquid storage chamber and a second lubricating liquid storage chamber. In this embodiment, the inner oil pan 120 is used to divide the first and second lubricating liquid storage chambers. For example, instead of the inner oil pan 120, the inner oil pan 120 rises from the bottom wall 101 of the oil pan 100. The first and second lubricating liquid storage chambers may be partitioned by the vertical wall portion. This vertical wall portion is an example of the inner wall portion.

  In the present embodiment, the second lubricating liquid storage chamber is formed in an annular shape so as to accommodate the first lubricating liquid storage chamber inside. As another example, the first and second lubricating liquid storage chambers may be arranged side by side.

  The oil pump 90 is an example of a pump that supplies the lubricating liquid in the lubricating liquid reservoir to the member to be lubricated. The thermo valve 160 is an example of a communication state variable unit that switches between a communication state and a non-communication state between the first lubricant storage chamber and the second lubricant storage chamber.

  The first rib 124 and the recess 126 are an example of an inflow amount control unit that limits the inflow amount of the lubricating liquid from the communication state varying unit side of the suction port. In the present embodiment, the inflow amount is limited by making it difficult for oil O to reach the suction port 173, which is an example of a suction port, by the first rib 124 and the recess 126.

  As another example of the inflow amount limiting means, a protrusion similar to the first rib 124 may protrude toward the bottom wall 121 from the oil screen 170 side. As in the present embodiment, the amount of the lubricating liquid having a low temperature reaching the suction port can be limited by this protrusion. Alternatively, a structure may be employed in which the suction port faces in the opposite direction with respect to the communication state variable means. This example will be specifically described. In the present embodiment, the suction port 173, which is an example of a suction port, faces the bottom wall portion 121. Instead, the suction port 173 is directed to the transmission mechanism 70 side. With this structure, the low-temperature oil O that has flowed in through the communication hole 161 does not easily reach the suction port 173 and is mixed with the surrounding oil O having a high temperature before reaching the suction port 173. This also provides the same effect as in the present embodiment.

  The communication hole 161 is an example of a communication path that is provided in the inner wall portion and communicates the first lubricating liquid storage chamber and the second lubricating liquid storage chamber.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, you may delete some components from all the components shown by embodiment mentioned above.

  DESCRIPTION OF SYMBOLS 10 ... Internal combustion engine, 31 ... Crank journal 31 (lubricated member), 90 ... Oil pump (pump), 100 ... Oil pan (lubricant storage part), 105 ... Outer oil pan (outer pan), 120 ... Inner oil pan ( Inner pan), 122 ... peripheral wall portion (inner wall portion), 131 ... first oil reservoir (first lubricating fluid reservoir), 124 ... first rib (inflow control means, rib, protrusion), 126 ... Recessed part (flow rate control means, recessed part), 132 ... second oil storage chamber (second lubricating liquid storage chamber), 160 ... thermo valve (communication state variable means), 161 ... communication hole (communication path), 173 ... Suction port, D1 ... first gap (gap), O ... oil (lubricant).

Claims (3)

A lubricating liquid storage section that is provided below a cylinder block of the internal combustion engine and stores a lubricating liquid that lubricates a lubricated member of the internal combustion engine;
A pump for supplying the lubricating liquid in the lubricating liquid reservoir to the lubricated member;
An inner wall portion that divides the lubricating liquid storage portion into a first lubricating liquid storage chamber and a second lubricating liquid storage chamber;
An inlet connected to the pump for sucking out the lubricating liquid in the first lubricating liquid storage chamber;
A communication path that is provided on the inner wall and communicates the first lubricating liquid storage chamber and the second lubricating liquid storage chamber;
A communication state variable means provided in the communication path, for switching between a communication state and a non-communication state between the first lubricating liquid storage chamber and the second lubricating liquid storage chamber;
An inflow amount restricting means for restricting an inflow amount of the lubricant from the communication state varying means side of the suction port ;
A recess recessed downward from the surrounding bottom is provided in at least a part of the bottom of the first lubricating liquid storage chamber located between the communication path and the suction port. Lubricating device characterized by that. The inflow amount limiting means is a projecting portion that is disposed between the suction port and the communication state varying means and projects upward from the bottom of the first lubricating liquid storage chamber. Item 2. The lubricating device according to Item 1. The lubricating liquid reservoir includes an inner pan that forms the first lubricating liquid reservoir, and an outer pan that is disposed outside the inner pan and forms the second lubricating liquid reservoir between the inner pan and the inner pan. With
The inner wall portion is a side wall portion of the inner pan,
The bottom of the inner pan and the bottom of the outer pan are in contact with each other,
The inflow amount limiting means is a rib formed by bending the bottom of the inner pan toward the first lubricating liquid storage chamber;
Between the bottom of the said rib Autapan, the lubricating apparatus according to claim 1 or 2, wherein the second lubricant storing chamber and a gap that communicates is formed.

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