JP5974551B2 - 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 the one tank 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.

JP 2006-207521 A JP 2001-123813 A

  There is a need to further promote warm-up of internal combustion engines.

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

A lubricating device according to claim 1 is provided below a cylinder block of an internal combustion engine, and includes a lubricating liquid storage section that stores a lubricating liquid for lubricating a lubricated member of the internal combustion engine, and the lubricating liquid storage section. A partition wall that is divided into a first lubricating liquid storage chamber that is open at the top and a second lubricating liquid storage chamber that surrounds the first lubricating liquid storage chamber and is open at the top; A pump for supplying the lubricating liquid in the lubricating liquid reservoir to the lubricated member; an inlet connected to the pump for sucking out the lubricating liquid in the first lubricating liquid storage chamber; and provided in the partition wall. A communication path that communicates the first lubricating liquid storage chamber and the second lubricating liquid storage chamber, and a communication path that is provided in the communication path, the first lubricating liquid storage chamber and the second lubricating liquid storage. A communication state switching means for switching between a communication state and a non-communication state with the room; The inner wall surface of the outer wall portion of the lubricating liquid reservoir is continuous with the inner wall surface of the crankcase of the cylinder block, and the upper edge of the partition wall extends from the inner wall surface of the lubricating liquid reservoir and the inner wall surface of the crankcase. Separated. The internal combustion engine includes an endless cable for transmitting a rotational force of a crankshaft to a camshaft on a side surface of the cylinder block, and an upper end edge of the partition wall located on the endless cable side is In the axial direction of the shaft, it is located closer to the outer wall side of the lubricating liquid reservoir than the endless cable.

  According to a second aspect of the present invention, in the first aspect of the present invention, the lubricating device includes a bracket that connects the partition wall and the inner wall surface of the lubricating liquid reservoir. The bracket is provided below an upper end edge of the partition wall.

According to a third aspect of the present invention, in the lubricating device according to the first or second aspect, the communication path is provided on a side surface of the partition wall, and the communication state switching means includes a valve portion that opens and closes the communication path; And a thermostat that drives the valve unit in accordance with the temperature of the lubricating liquid. At least a part of the upper end edge of the partition wall is formed with a lubricating liquid receiving portion extending toward the second lubricating liquid storage chamber. The thermostat is provided in the first lubricant storage chamber and below the lubricant receiver.

According to a fourth aspect of the present invention, there is provided the lubrication apparatus according to the third aspect , further comprising a communication pipe communicating with the suction port and the pump. The communication pipe is disposed on the side opposite to the lubricating liquid receiving portion.

  According to the present invention, the temperature of the lubricating liquid in the first lubricating liquid storage chamber can be raised quickly, and the lubricating liquid in the first lubricating liquid storage chamber is sucked and supplied to the member to be lubricated. The engine warm-up can be further promoted.

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.

  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. In the figure, the upper side is the upper side, and the lower side is the lower side.

  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 and on the transmission mechanism 70 side 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 has a bottomed shape with an open upper end, 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 oil pan 100. 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.

  For this reason, the inside of the oil pan 100 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. In FIG. 5, the cylinder block 20 and the like are omitted.

  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. Furthermore, in other words, the oil receiving part 150 is formed on at least a part of the upper end edge of the peripheral wall part 122.

  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 in portions along the direction in which the axis X of the crankshaft 30 extends. One bracket 140 is formed on the upper end edge 123 of the peripheral wall portion 122 facing 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. In other words, the communication hole 161 is formed on the side surface of the inner oil pan 120. 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 first oil storage chamber 131. 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 movably accommodated in the thermostat 163, that is, in the wax.

  The wax in the thermostat 163 is melted to increase the volume of the wax. 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.

  The suction part 171 accommodates a wire mesh that removes large dust in the oil O and the like. The suction port 173 is opposed to the bottom wall 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.

  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. That is, the pipe part 172 is disposed on the opposite side to the oil receiving part 150. For this reason, the pipe part 172 does not overlap the thermo valve 160 in the vertical direction A.

  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 oil pan 100 in the second oil reservoir chamber 132 between the oil pan 100 and the inner oil pan 120. Fall and accumulate.

  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 oil O having a high temperature flowing through the oil receiving portion 150 and flowing into the first oil storage chamber 131 adheres to the thermo valve 160 in the course of the flow. 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 end edge of the oil pan 100 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.

  As described above, the oil O whose temperature has been increased after lubricating the inside of the internal combustion engine 10 with the oil O returns to the first oil storage chamber 131, and the oil O whose temperature remains low simply by lubricating the crankshaft 30. Returns to the second oil reservoir 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, 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.

  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.

  Further, the portion on the timing chain 73 side in the peripheral wall portion 122 of the inner oil pan 120 is located closer to the inner wall surface 103 side of the peripheral wall portion 102 of the oil pan 100 than the timing chain 73. As a result, the oil O heated by the transmission mechanism 70 can be guided into the first oil storage chamber 131, and therefore warming 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.

  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 inner oil pan 120, the oil pump 90, the oil screen 170, the bracket 140, and the thermo valve 160 are included in the lubricating device 180 that supplies oil O to each lubricated member. It constitutes an example.

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

  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 switching 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 timing chain 73 is an example of an endless rope for transmitting the rotational force of the crankshaft to the camshaft. As another example of the endless rope, for example, a timing belt may be used.

  The communication hole 161 is an example of a communication path that is provided in the partition wall and communicates between the first lubricating liquid storage chamber and the second lubricating liquid storage chamber. The pipe portion 172 is an example of a communication pipe that communicates with the suction port and the pump.

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.
The invention described in the scope of claims at the beginning of the filing of the present application will be appended.
[1]
A lubricating liquid storage section that is provided below a cylinder block of the internal combustion engine and stores a lubricating liquid for lubricating a lubricated member of the internal combustion engine;
The lubricating liquid reservoir is divided into a first lubricating liquid reservoir chamber that is open at the top, and a second lubricating liquid reservoir chamber that surrounds the first lubricating liquid reservoir chamber and is open at the top. A partition wall to partition,
A pump for supplying the lubricating liquid in the lubricating liquid reservoir to the lubricated member;
An inlet connected to the pump for sucking out the lubricating liquid in the first lubricating liquid storage chamber;
A communication path provided in the partition wall and communicating the first lubricating liquid storage chamber and the second lubricating liquid storage chamber;
A communication state switching 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;
Comprising
The inner wall surface of the outer wall portion of the lubricating liquid reservoir is continuous with the inner wall surface of the crankcase of the cylinder block,
The upper end edge of the partition wall is separated from the inner wall surface of the lubricating liquid reservoir and the inner wall surface of the crankcase.
Lubricating device characterized by that.
[2]
A bracket for connecting the partition wall and the inner wall surface of the lubricating liquid reservoir;
The bracket is provided below the upper edge of the partition wall.
The lubricating device according to claim 1, wherein:
[3]
The internal combustion engine includes an endless rope for transmitting a rotational force of a crankshaft to a camshaft on a side surface of the cylinder block.
The upper end edge of the partition wall located on the endless rope side is located closer to the outer wall side of the lubricating liquid reservoir than the endless rope in the axial direction of the crankshaft.
The lubricating device according to claim 1 or 2, wherein
[4]
The communication path is provided on a side surface of the partition wall,
The communication state switching means includes a valve part that opens and closes the communication path, and a thermostat that drives the valve part according to the temperature of the lubricating liquid,
At least a part of the upper edge of the partition wall is formed with a lubricating liquid receiving portion extending to the second lubricating liquid storage chamber side,
The thermostat is provided in the first lubricating liquid storage chamber and below the lubricating liquid receiving portion.
The lubricating device according to any one of claims 1 to 3, wherein
[5]
A communication pipe communicating with the suction port and the pump;
The communication pipe is disposed on the side opposite to the lubricating liquid receiving portion.
The lubrication apparatus according to claim 4, wherein:

  DESCRIPTION OF SYMBOLS 10 ... Internal combustion engine, 20 ... Cylinder block, 31 ... Crank journal, 31 (member to be lubricated), 73 ... Timing chain (endless rope), 90 ... Oil pump (pump), 100 ... Oil pan (lubricant storage part) 122 ... peripheral wall (partition wall), 123 ... upper edge, 131 ... first oil reservoir (first lubricant reservoir), 132 ... second oil reservoir (second lubricant reservoir) , 140 ... brackets, 160 ... thermo valves (communication state switching means), 161 ... communication holes (communication passages), 162 ... valve parts, 163 ... thermostats, 172 ... pipe parts (communication pipes), 173 ... suction ports, 180 ... Lubricating device, O ... oil (lubricant).

Claims (4)

A lubricating liquid storage section that is provided below a cylinder block of the internal combustion engine and stores a lubricating liquid for lubricating a lubricated member of the internal combustion engine;
The lubricating liquid reservoir is divided into a first lubricating liquid reservoir chamber that is open at the top, and a second lubricating liquid reservoir chamber that surrounds the first lubricating liquid reservoir chamber and is open at the top. A partition wall to partition,
A pump for supplying the lubricating liquid in the lubricating liquid reservoir to the lubricated member;
An inlet connected to the pump for sucking out the lubricating liquid in the first lubricating liquid storage chamber;
A communication path provided in the partition wall and communicating the first lubricating liquid storage chamber and the second lubricating liquid storage chamber;
A communication state switching means provided in the communication path, for switching between a communication state and a non-communication state between the first lubricant storage chamber and the second lubricant storage chamber;
The inner wall surface of the outer wall portion of the lubricating liquid reservoir is continuous with the inner wall surface of the crankcase of the cylinder block ,
The upper edge of the partition wall is separated from the inner wall surface of the lubricating liquid reservoir and the inner wall surface of the crankcase ,
In the internal combustion engine, the torque of the crankshaft is applied to the side of the cylinder block.
With endless cords for transmission to the
The upper edge of the partition wall located on the endless rope side is in the axial direction of the crankshaft.
The lubricating device is located closer to the outer wall side of the lubricating liquid reservoir than the endless cable . A bracket for connecting the partition wall and the inner wall surface of the lubricating liquid reservoir;
The lubricating device according to claim 1, wherein the bracket is provided below an upper end edge of the partition wall. The communication path is provided on a side surface of the partition wall,
The communication state switching means includes a valve part that opens and closes the communication path, and a thermostat that drives the valve part according to the temperature of the lubricating liquid,
At least a part of the upper edge of the partition wall is formed with a lubricating liquid receiving portion extending to the second lubricating liquid storage chamber side,
The lubricating device according to claim 1 or 2 , wherein the thermostat is provided in the first lubricating liquid storage chamber and below the lubricating liquid receiving portion. A communication pipe communicating with the suction port and the pump;
The lubricating device according to claim 3 , wherein the communication pipe is disposed on a side opposite to the lubricating liquid receiving portion.

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