JP2018091229A - Internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly supply lubricant to a bearing of a crank shaft by an oil pump, which is driven with rotation of the crank shaft, in starting an internal combustion engine.SOLUTION: An internal combustion engine is configured to supply lubricant to a bearing of a crank shaft CS from a lubricant supply passage (passage from a lubricant flow passage 65a to a bearing surface 34a through a solenoid valve 20, a bearing beam 52 and a bearing cap 32) dedicated for the bearing of the crank shaft CS, in priority to a lubricant supply passage (passage from a lubricant flow passage 65b to a bearing surface 46a and each portion of an internal combustion engine 1 through an oil gallery 43a) configured to distributing lubricant to each portion of the internal combustion engine 1 including the bearing of the crank shaft CS, thereby quickly supplying lubricant to the bearing of the crank shaft CS even right after the internal combustion engine 1 is started.SELECTED DRAWING: Figure 16

Description

  The present invention relates to an internal combustion engine capable of quickly supplying lubricating oil to a crankshaft bearing when the internal combustion engine is started.

  Japanese Patent Laying-Open No. 2012-225249 (Patent Document 1) includes a mechanical main oil pump driven by rotation of a crankshaft and an electric sub oil pump, and the internal combustion engine is operating. When the main oil pump pumps lubricating oil to each part of the internal combustion engine including the bearing of the crankshaft and the internal combustion engine is stopped and the oil pressure in the oil passage falls below a predetermined value, the sub oil pump Describes an internal combustion engine configured to be capable of pumping lubricating oil to at least a crankshaft bearing.

  In the internal combustion engine, a structure in which sufficient lubricating oil is supplied to the bearing of the crankshaft even immediately after the internal combustion engine is started from a state where the internal combustion engine is stopped can prevent the oil film from running out of the crankshaft bearing. Therefore, it is intended to improve lubrication performance in an internal combustion engine that is repeatedly started and stopped, such as an internal combustion engine with an idle stop function and an internal combustion engine mounted on a hybrid vehicle.

JP 2012-225249 A

  However, since the above-described internal combustion engine requires a relatively expensive electric oil pump, there is still room for improvement in terms of cost reduction. In hybrid vehicles, it is desirable to increase the cruising distance by motor traveling from the viewpoint of improving fuel efficiency. To increase the cruising distance by motor traveling, use of auxiliary equipment driven by electric power such as an electric oil pump is as much as possible. It is desirable to avoid it.

  The present invention has been made in view of the above, and when the internal combustion engine is started, the oil can be quickly supplied to the bearing of the crankshaft by an oil pump that is driven as the crankshaft rotates. The purpose is to provide technology.

  The internal combustion engine of the present invention employs the following means in order to achieve the above-described object.

According to a preferred embodiment of the internal combustion engine according to the present invention, an internal combustion engine body having a plurality of bearings;
A crankshaft rotatably supported by the plurality of bearings, an oil pump that is driven in accordance with the rotation of the crankshaft, and lubricating oil discharged from the oil pump is supplied and supplied. A first lubricating oil passage configured to distribute the lubricated oil to each part of the internal combustion engine including a plurality of bearings, and a lubricating oil discharged from an oil pump to be supplied and supplied And a second lubricating oil passage configured to supply the lubricating oil to a plurality of bearings until a predetermined condition is satisfied.

  Here, the “predetermined condition” in the present invention typically refers to the first lubricating oil flow path to a state where sufficient lubricating oil can be supplied from the first lubricating oil flow path to the bearing of the crankshaft. This corresponds to the state in which the hydraulic pressure inside is increased.

  The first lubricating oil passage has a relatively large passage volume in terms of the constitution for distributing the lubricating oil to each part of the internal combustion engine including a plurality of bearings. Therefore, in the internal combustion engine having only the first lubricating oil passage, A relatively large time lag occurs between the start of the internal combustion engine and the supply of lubricating oil to the bearing of the crank bearing. This is because the lubricating oil is not supplied to the bearing of the crank bearing until the first lubricating oil flow path is filled with the lubricating oil. However, according to the present invention, in addition to the first lubricating oil flow path for distributing the lubricating oil to each part of the internal combustion engine including the plurality of bearings, the first flow path as a dedicated flow path for supplying the lubricating oil to the plurality of bearings. Since the configuration includes two lubricating oil passages, when the internal combustion engine is started, the lubricating oil can be supplied from the second lubricating oil passage to the bearing of the crankshaft. Immediately after this, the lubricating oil can be quickly supplied to the bearing of the crankshaft. And since it is the structure using the lubricating oil discharged from the oil pump driven with rotation of a crankshaft, it is not necessary to use the auxiliary machine etc. which are driven by electric power, such as an electric oil pump. After the predetermined condition is satisfied, the lubricating oil discharged from the oil pump is supplied to each part of the internal combustion engine including the crankshaft bearing only from the first lubricating oil flow path. It is possible to satisfactorily suppress the occurrence of poor lubrication oil supply.

  According to the further form of the internal combustion engine which concerns on this invention, it is further provided with the starter motor driven in order to start an internal combustion engine. The second lubricating oil passage is configured to supply the lubricating oil to the plurality of bearings until the starter motor is stopped as a predetermined condition.

  According to this embodiment, while the crankshaft is being rotated by the starter motor, that is, while the discharge pressure of the oil pump that is driven in accordance with the rotation of the crankshaft is low, the bearing of the crankshaft from the second lubricating oil passage is used. Therefore, sufficient lubricating oil can be supplied to the crankshaft bearing from the start of the internal combustion engine, and when the rotation of the crankshaft by the starter motor is stopped, that is, the oil When the pump discharge pressure exceeds a predetermined pressure, the lubricating oil is supplied from only the first lubricating oil flow path to each part of the internal combustion engine including the crankshaft bearing. Generation | occurrence | production can be suppressed favorably. Since only the drive state of the starter motor is detected, switching between supply and stop of supply of lubricant from the second lubricant passage to the bearing of the crankshaft can be realized with simple control.

  According to the further form of the internal combustion engine which concerns on this invention, the detection apparatus which detects the rotation speed of a crankshaft is further provided. The second lubricating oil passage is configured to supply lubricating oil to the plurality of bearings until the crankshaft rotation speed detected by the detection device reaches a predetermined rotation speed after the start of the internal combustion engine as a predetermined condition. It is configured.

  According to this embodiment, until the crankshaft rotation speed reaches the predetermined rotation speed, that is, while the discharge pressure of the oil pump driven with the rotation of the crankshaft is low, the crankshaft from the second lubricating oil passage Since the configuration is such that the lubricating oil is supplied to the shaft bearing, sufficient lubricating oil can be supplied to the crankshaft bearing from the start of the internal combustion engine, and the rotational speed of the crankshaft has exceeded the predetermined rotational speed. In other words, when the discharge pressure of the oil pump becomes equal to or higher than a predetermined pressure, the lubricating oil is supplied from only the first lubricating oil passage to each part of the internal combustion engine including the crankshaft bearing. The occurrence of poor lubricating oil can be satisfactorily suppressed. Note that since only the rotation speed of the crankshaft is detected, switching between supply and stoppage of supply of lubricant from the second lubricant flow path to the bearing of the crankshaft can be realized with simple control.

  According to the further form of the internal combustion engine according to the present invention, the second lubricating oil passage is allowed to flow the lubricating oil discharged from the oil pump into the plurality of bearings until a predetermined condition is satisfied, A switching member is provided that prohibits the inflow of lubricating oil into the plurality of bearings when the condition is satisfied.

  According to this embodiment, it is possible to realize the switching between supply and stop of supply of the lubricating oil from the second lubricating oil flow path to the crankshaft bearing with a simple configuration in which only the switching member is provided in the second lubricating oil flow path.

  According to the further form of the internal combustion engine which concerns on this invention, the internal combustion engine main body is a cylinder block which has a some 1st bearing surface which comprises a some bearing, and an upper oil pan comprised so that an oil pump may be provided. And is composed of. Moreover, the 1st lubricating oil flow path has the 1st oil pan side flow path provided in the upper oil pan, and the 1st block side flow path provided in the cylinder block. The first oil pan side flow path is configured such that one end is connected to the discharge port of the oil pump and the lubricating oil supplied from the discharge port flows toward the other end. The first block-side flow path is connected at one end to the first oil pan-side flow path, and is configured to distribute the lubricating oil supplied from the first oil pan-side flow path to each part of the internal combustion engine including a crankshaft bearing. Has been. And the 2nd lubricating oil flow path has the 2nd oil pan side flow path provided in the upper oil pan. The second oil pan-side flow path is configured so that one end is connected to the discharge port of the oil pump and the lubricating oil supplied from the discharge port is supplied to the bearing of the crankshaft.

  According to this embodiment, since only the lubricating oil flow path is provided in each of the cylinder block and the upper oil pan, when the internal combustion engine is started, the crankshaft bearing is driven by the oil pump that is driven as the crankshaft rotates. Thus, it is possible to easily ensure a configuration capable of promptly supplying the lubricating oil.

  According to the further form of the internal combustion engine which concerns on this invention, the cylinder block has the 2nd bearing surface which comprises a some bearing with a 1st bearing surface, and the some bearing structural member connected with the connection member is fastening. Has been. Further, the bearing component member has a first internal flow path having one end connected to the second bearing surface. Furthermore, the connecting member has a second internal flow path connected to the other end of the first internal flow path and connected to the second oil pan side flow path. The second lubricating oil flow path supplies the lubricating oil discharged from the discharge port of the oil pump from the second oil pan side flow path to the second bearing surface via the second and first internal flow paths. It is configured.

  According to this embodiment, the second lubricating oil passage can be configured without providing a dedicated component. In addition, since only the internal flow path is provided in each of the bearing constituent member and the connecting member, the configuration is simple.

  According to the further form of the internal combustion engine which concerns on this invention, the cylinder block has the 2nd block side flow path connected to the bearing of the crankshaft and connected to the 2nd oil pan side flow path. The second lubricating oil flow path is configured to supply the lubricating oil discharged from the discharge port of the oil pump from the second oil pan side flow path to the crankshaft bearing via the second block side flow path. ing.

  According to this embodiment, the second lubricating oil passage can be configured without providing a dedicated component. In addition, since only the lubricating oil passage connected to the crankshaft bearing and the second oil pan side passage is provided in the cylinder block, the configuration is also simple.

  According to the further form of the internal combustion engine which concerns on this invention, the several bearing structural member which has the 2nd bearing surface which comprises the bearing of a crankshaft with the 1st bearing surface is fastened by the cylinder block. The bearing component has a first internal flow path having one end connected to the second bearing surface and the other end connected to the second block-side flow path. The second lubricating oil flow path allows the lubricating oil discharged from the discharge port of the oil pump to flow from the second oil pan side flow path to the second bearing surface via the second block side flow path and the first internal flow path. It is configured to supply.

  According to this embodiment, the bearing component only has the internal flow path connected to the second bearing surface and the second block side flow path, so that the lubricating oil is supplied from the second block side flow path to the bearing of the crankshaft. Can be easily secured.

  According to the further form of the internal combustion engine which concerns on this invention, the internal combustion engine main body is provided with the cylinder block which has several 1st bearing surfaces which comprise several bearings. Moreover, the 1st lubricating oil flow path has the 1st block side flow path provided in the cylinder block, and the 2nd block side flow path provided in the cylinder block. The first block side flow path is configured so that one end is connected to the discharge port of the oil pump and the lubricating oil supplied from the discharge port of the oil pump flows toward the other end. The second block side flow path is connected to the first block side flow path at one end, and is configured to distribute the lubricating oil supplied from the first block side flow path to each part of the internal combustion engine including a crankshaft bearing. ing. And the 2nd lubricating oil flow path has the 3rd block side flow path provided in the cylinder block. One end of the third block side flow path is connected to the discharge port of the oil pump, and the lubricating oil supplied from the discharge port is supplied to the bearing of the crankshaft.

  According to this embodiment, since only the lubricating oil flow path is provided in the cylinder block, when the internal combustion engine is started, the lubricating oil is quickly supplied to the bearing of the crankshaft by the oil pump that is driven as the crankshaft rotates. The structure which can be supplied to can be easily secured.

  According to the present invention, when the internal combustion engine is started, the oil can be quickly supplied to the bearing of the crankshaft by the oil pump that is driven as the crankshaft rotates.

1 is a schematic configuration diagram showing an outline of a configuration of an internal combustion engine 1 according to an embodiment of the present invention. 2 is a perspective view showing an appearance of a cylinder block 4. FIG. It is the top view which looked at the cylinder block 4 from upper direction. It is sectional drawing which shows the AA cross section of FIG. 3 is a cross-sectional view showing an outline of a configuration of a bearing cap 32. FIG. 3 is a perspective view showing an appearance of a bearing beam 52. FIG. FIG. 4 is a perspective view showing a state of arrangement of a bearing cap 32 and a crankshaft CS in an upper oil pan 6. It is an external view which shows the outline of a structure of the crankshaft CS. It is the perspective view which looked at the upper oil pan 6 from the outer wall part 62b side in which the filter attachment boss | hub part 63 was provided. It is the perspective view which looked at the upper oil pan 6 from the outer wall part 62a side. It is the front view which looked at the upper oil pan 6 from the oil pump housing 64 side. It is the side view which looked at the upper oil pan 6 from the outer wall part 62b side in which the filter attachment boss | hub part 63 was provided. It is the side view which looked at the upper oil pan 6 of the state to which the sub oil filter 18 and the solenoid valve 20 were attached from the outer wall part 62b side. It is sectional drawing which shows the BB cross section of FIG. It is explanatory drawing which shows the mode of the upper oil pan 6 in the state to which the sub oil filter 18, the solenoid valve 20, and the bearing beam 52 were attached. FIG. 6 is a front view of the arrangement of the bearing cap 32 and the crankshaft CS in the upper oil pan 6 as viewed from the axial direction of the crankshaft CS. It is explanatory drawing which shows the mode of the flow of the lubricating oil supplied to the journal part 22 of crankshaft CS. It is explanatory drawing which shows the mode of the flow of the lubricating oil supplied to the journal part 22 of crankshaft CS. It is a perspective view which shows the external appearance of the principal part of the internal combustion engine 100 of a modification. It is the side view which looked at the external appearance of the principal part of the internal combustion engine 100 of the modification from the outer wall part 62b side in which the filter attachment boss | hub part 63 was provided. It is sectional drawing which shows CC cross section of FIG. FIG. 4 is a cross-sectional view illustrating a schematic configuration of a bearing cap 132. It is explanatory drawing which shows the mode of the flow of the lubricating oil supplied to the journal part 22 of the crankshaft CS in the internal combustion engine 100 of the modification. It is explanatory drawing which shows the mode of the flow of the lubricating oil supplied to the journal part 22 of the crankshaft CS in the internal combustion engine 100 of the modification. It is the front view which looked at the internal combustion engine 200 of the modification from the one side of the axial direction of the crankshaft CS. It is a perspective view which shows the external appearance of the principal part of the internal combustion engine 200 of a modification. It is the side view which looked at the internal combustion engine 200 of the modification from the sub filter 18 side. It is explanatory drawing which shows the oil-path structure of the internal combustion engine 200 of a modification. It is explanatory drawing which shows the oil-path structure of the internal combustion engine 200 of a modification.

  Next, the best mode for carrying out the present invention will be described using examples.

  As shown in FIG. 1, the internal combustion engine 1 according to the present embodiment includes a cylinder head 2, a cylinder block 4 fastened below the cylinder head 2, and an upper oil fastened below the cylinder block 4. A pan 6, a lower oil pan 8 fastened below the upper oil pan 6, a rocker cover 10 fastened above the cylinder head 2, an intake manifold 12 fastened to the side of the cylinder head 2, A rocker cover 10, a cylinder head 2, a cylinder block 4 and a front cover 14 fastened to the upper oil pan 6, and a starter motor STM attached to the cylinder block 4 for starting the internal combustion engine 1. This is configured as an in-line three-cylinder gasoline engine in which three cylinders are arranged in series. The internal combustion engine 1 outputs power by reciprocating a piston (not shown) by combustion pressure generated in a combustion chamber (not shown), and converting the reciprocating motion of the piston into a rotational motion of the crankshaft CS. In the present embodiment, for convenience, the rocker cover 10 side, that is, the upper side in FIG. 1 is defined as “upper” or “upper side”, and the lower oil pan 8 side, that is, the lower side in FIG. It is defined as “downward” or “lower”.

  The cylinder block 4 is configured as one of the main components constituting the skeleton of the internal combustion engine 1, and as shown in FIGS. 2 and 3, four outer wall portions 42a, 42b, 42c, 42d, a cylinder bore wall 44 having three cylinder bores 44a, 44b, 44c, and a support wall 46 that rotatably supports the crankshaft CS. The cylinder block 4 is an example of an implementation configuration corresponding to the “internal combustion engine body” in the present invention.

  Of the outer wall portions 42a, 42b, 42c, 42d, one outer wall portion 42d extending along the arrangement direction of the cylinder bores 44a, 44b, 44c (hereinafter referred to as “cylinder row direction”) is shown in FIGS. As shown, an oil gallery 43a extending in the cylinder row direction is formed. The oil gallery 43a is a main oil passage for supplying (distributing) lubricating oil to each part of the internal combustion engine 1 including a bearing surface 46a described later, for example, a journal part of a camshaft (not shown), a timing chain, a valve timing mechanism, and the like. It is configured as. Further, as shown in FIG. 2, a mounting flange 42b ′ for mounting a starter motor STM (see FIG. 1) is attached to one of the outer wall portions 42a and 42b connected to the outer wall portions 42c and 42d. Is integrally formed so as to project toward the outer wall portion 42d side.

  2 and 3, the cylinder bore wall 44 is configured such that three cylinder bores 44a, 44b, 44c are arranged in series, and the cylinder bore walls 44 adjacent to each other are connected to each other. It constitutes the Sayme's cylinder. A piston (not shown) slides in the cylinder bores 44a, 44b, 44c.

  The support wall portion 46 is configured to connect both outer wall portions 42c and 42d extending along the cylinder row direction among the outer wall portions 42a, 42b, 42c, and 42d, and connects the crank chamber to each cylinder bore 44a. , 44b, 44c, four are provided in the cylinder row direction so as to be partitioned. In addition, two support wall parts 46 and 46 located in the both ends of a cylinder row direction among the support wall parts 46 are integrally formed in the outer wall parts 42a and 42b.

  As shown in FIG. 4, each support wall portion 46 is formed with a substantially semicircular bearing surface 46a that constitutes a bearing for supporting the crankshaft CS, and the bearing surface 46a and the oil gallery 43a are connected to each other. A communication oil passage 43b for communication connection is formed. The bearing surface 46a is an example of the implementation structure corresponding to the "first bearing surface" in the present invention.

  Further, as shown in FIG. 4, one end of the support wall 46 (see FIG. 2) disposed between the second cylinder bore 44b and the third cylinder bore 44c from the outer wall 42a side is connected to the oil gallery 43a. A supply oil passage 43 c that is connected and has the other end opened to the lower deck 4 a of the cylinder block 4 is formed. The oil gallery 43a, the communication oil passage 43b, and the supply oil passage 43c are an example of an implementation configuration corresponding to the “first block side flow passage” in the present invention.

  As shown in FIG. 4, the bearing cap 32 is fastened to the lower surface (surface on the lower deck 4a side) of each support wall portion 46 by a pair of bolts BLT1 and BLT1. As shown in FIG. 5, the bearing cap 32 has a horizontally long rectangular main body portion 34 and a lower surface 34 e (surface opposite to the fastening surface 34 d to the support wall portion 46) of the main body portion 34 from below ( 5 is formed in a substantially T-shape when viewed from the front. The bearing cap 32 is an example of the implementation structure corresponding to the "bearing structural member" in this invention.

  As shown in FIG. 5, the main body portion 34 is formed with a substantially semicircular bearing surface 34a and a pair of insertion holes 34b and 34c for inserting the pair of bolts BLT1 and BLT1. The bearing surface 34 a constitutes a bearing that supports the crankshaft CS together with the bearing surface 46 a formed on each support wall portion 46. The pair of insertion holes 34b and 34c are provided on both sides of the bearing surface 34a so as to sandwich the bearing surface 34a, and are formed so as to penetrate from the lower surface 34e of the main body 34 to the fastening surface 34d to the support wall portion 46. Yes. The bearing surface 34a is an example of an implementation configuration corresponding to the “second bearing surface” in the present invention.

  As shown in FIG. 5, an enlarged diameter hole 35a having a diameter larger than that of the other part of the insertion hole 34b is formed in a portion near the fastening surface 34d of the insertion hole 34b. Further, as shown in FIG. 5, a communication groove 35b that connects the enlarged-diameter hole 35a and the bearing surface 34a is formed in the fastening surface 34d of the fastening surface 34d where the insertion hole 34b opens.

  As shown in FIG. 5, a bearing beam 52, which will be described later, is fastened to the projecting end surface of the projecting portion 36 of each bearing cap 32 by a bolt BLT2, thereby connecting the bearing caps 32 to each other as shown in FIG. (See FIGS. 4, 5 and 6). The bearing beam 52 is an example of an implementation configuration corresponding to the “connecting member” in the present invention.

  As shown in FIG. 5, a screw hole 37 a for attaching the bolt BLT <b> 2 is formed in the protruding portion 36. A diameter-enlarged hole 37b having a diameter larger than that of the screw hole 37a is formed in a portion near the fastening surface to which the bearing beam 52 is fastened in the screw hole 37a. The enlarged diameter hole 37b is connected to the enlarged diameter hole 35a through a communication hole 35c. The enlarged-diameter hole 37b, the communicating hole 35c, the enlarged-diameter hole 35a, and the communicating groove 35b are an example of an implementation configuration corresponding to the “first internal flow path” in the present invention.

  As shown in FIG. 6, the bearing beam 52 is configured as a long rectangular parallelepiped, and an oil passage 52 a is formed in the inside along the longitudinal direction. The bearing beam 52 is formed with four insertion holes 52b through which the bolts BLT2 for fastening to the bearing caps 32 are inserted. As shown in FIG. 5, an enlarged diameter hole 52c having a diameter larger than that of the other part of the insertion hole 52b is formed in a part of the insertion hole 52b near the fastening surface that is fastened to the bearing cap 32. . The diameter expansion hole 52 c communicates with the oil passage 52 a and is formed to have an inner diameter that is substantially the same size as the diameter expansion hole 37 b formed in the protrusion 36 of the bearing cap 32. Further, in the four insertion holes 52b of the bearing beam 52, the portion corresponding to the second insertion hole 52b from the left in FIG. 6 is orthogonal to the oil passage 52a and the insertion hole 52b as shown in FIG. A pipe member 54 is attached to the pipe. The internal passage of the pipe member 54 communicates with the oil passage 52a. The oil passage 52a, the enlarged diameter hole 52c, and the pipe member 54 are an example of an implementation configuration corresponding to the “second internal flow passage” in the present invention.

  The crankshaft CS is rotatably supported by the cylinder block 4 by a bearing configured by fastening the bearing cap 32 thus configured to the lower surface of each support wall portion 46 of the cylinder block 4. As shown in FIG. 8, the crankshaft CS includes a journal portion 22, a crank pin 24 provided at a position eccentric to the journal portion 22, a crank arm 26 connecting the journal portion 22 and the crank pin 24, And a flange portion 28 for fastening an inertia mass such as a flywheel (not shown).

  The journal portion 22 is configured as a support portion supported by a bearing constituted by the bearing surface 46a of the cylinder block 4 and the bearing surface 34a of the bearing cap 32, and has a diameter penetrating in the radial direction as shown in FIG. A direction through hole 22a is formed. The crank pin 24 is configured as a portion to which a connecting rod of a piston (not shown) is connected, and penetrates from the outer peripheral surface of the crank pin 24 to the radial through hole 22a of one journal portion 22 adjacent to the crank pin 24. A connecting hole 22b is formed. The crank arm 26 is integrated with a balance weight for reducing the inertia force generated by the movement of the piston and the connecting rod, and constitutes a crank web.

  The upper oil pan 6 is configured as one of the main parts constituting the crank chamber together with the cylinder block 4, and as shown in FIGS. 9 and 10, three outer wall portions 62 a constituting the outer shell of the upper oil pan 6. 62b, 62c, and a baffle plate 62d configured to connect a pair of outer wall portions 62a, 62b extending along the cylinder row direction among the outer wall portions 62a, 62b, 62c. The upper oil pan 6 is an example of an implementation configuration corresponding to the “internal combustion engine body” in the present invention.

  One end side of the upper oil pan 6 in the cylinder row direction (the left side in FIG. 9), that is, the end opposite to the side where the outer wall portion 62c is connected among the ends of the pair of outer wall portions 62a and 62b in the cylinder row direction. The part side is opened, and the front cover 14 is fastened to the opened end (see FIG. 1). A filter for attaching the main oil filter 16 (see FIG. 1) to one outer wall 62b of the pair of outer walls 62a and 62b extending along the cylinder row direction, as shown in FIGS. A mounting boss 63, a filter mounting boss 67 for mounting the sub oil filter 18 (see FIGS. 7 and 13), and a valve mounting boss 69 for mounting the electromagnetic valve 20 (see FIGS. 7 and 13) Are integrally formed. Further, as shown in FIGS. 9, 10, and 11, an oil pump housing 64 is integrally formed inside the outer wall portion 62b. The solenoid valve 20 is an example of an implementation configuration corresponding to the “switching member” in the present invention.

  As shown in FIG. 9, the filter mounting boss 63 has an introduction oil passage 63 a for introducing the lubricating oil into the main oil filter 16 and a derivation for deriving the lubricating oil after passing through the main oil filter 16. An oil passage 63b is formed. The introduction oil passage 63a is formed in an annular shape so as to surround the lead-out oil passage 63b. As shown in FIGS. 4 and 9, the lead-out oil passage 63b has one end opened to the end surface of the filter mounting boss 63 and the other end directed to the mounting surface side of the upper oil pan 6 to the cylinder block 4 (see FIG. 4 and FIG. 9). 9 is formed in a substantially L-shape that opens to the upper side. As shown in FIG. 4, the opening facing upward of the lead-out oil passage 63 b is formed in a supply oil passage 43 c formed in the cylinder block 4 when the upper oil pan 6 is fastened to the lower deck 4 a of the cylinder block 4. Communication connection.

  As shown in FIG. 9, the filter mounting boss portion 67 is formed with an introduction oil passage 67a extending from the end surface of the filter mounting boss portion 67 toward the inside of the outer wall portion 62b by a predetermined distance in the horizontal direction. . The introduction oil passage 67a is formed in a bag path shape without penetrating the outer wall portion 62b.

  As shown in FIG. 9, the valve mounting boss portion 69 is formed with a supply oil passage 69 a that extends in the horizontal direction from the end surface of the valve mounting boss portion 69 so as to penetrate the inside of the outer wall portion 62 b. As shown in FIG. 10, a pipe member 70 is attached to the opening of the supply oil passage 69a inside the outer wall 62b so as to protrude inside the outer wall 62b. As shown in FIGS. 14 and 15, the pipe member 70 is connected to the pipe member 54 of the bearing beam 52 by a pipe 80. Thereby, the supply oil path 69a and the oil path 52a in the bearing beam 52 are communicated.

  As shown in FIG. 11, the oil pump housing 64 has a discharge flow path 64a and a suction flow path 64b, and two lubricating oil flow paths 65a and 65b are connected to the discharge flow path 64a. In other words, it can also be said that the two lubricating oil passages 65a and 65b are open to the discharge passage 64a. The suction flow path 64b is connected in communication with a strainer (not shown) that is immersed in the lubricating oil in the lower oil pan 8. Further, in the oil pump housing 64, as shown in FIG. 16, a pump gear PG constituting the oil pump OP is accommodated. The pump gear PG is driven as the crankshaft CS rotates. The discharge flow path 64a is an example of an implementation configuration corresponding to the “oil pump discharge port” in the present invention.

  The lubricating oil passage 65a extends in the cylinder row direction by a predetermined distance from the discharge passage 64a, and then is connected to the introduction oil passage 67a as shown in FIGS. The introduction oil passage 67a is connected in communication with the supply oil passage 69a by a connection oil passage 68 formed in the outer wall portion 62b. That is, the lubricating oil passage 65a is connected to the supply oil passage 69a through the introduction oil passage 67a, the sub oil filter 18, the connection oil passage 68, and the electromagnetic valve 20. The lubricating oil passage 65a, the introduction oil passage 67a, the sub oil filter 18, the connection oil passage 68, the electromagnetic valve 20, and the supply oil passage 69a are examples of the implementation configuration corresponding to the “second oil pan side passage” in the present invention. It is.

  The solenoid valve 20 is configured as a switching valve that switches between a communication state in which the lubricating oil passage 65a and the supply oil passage 69a are communicated and a shut-off state in which the communication between the lubricating oil passage 65a and the supply oil passage 69a is cut off. ing. The electromagnetic valve 20 switches the state based on a valve switching signal from an internal combustion engine electronic control unit (not shown) that controls the internal combustion engine 1. Here, in the present embodiment, the solenoid valve 20 is controlled so that the lubricating oil passage 65a and the supply oil passage 69a are in communication with each other until the rotational speed of the crankshaft CS reaches a predetermined rotational speed. The electromagnetic valve 20 is controlled such that the lubricating oil passage 65a and the supply oil passage 69a are shut off when the number of rotations of the CS becomes equal to or higher than a predetermined number.

  Further, as shown in FIGS. 10 and 12, the lubricating oil flow path 65 b extends from the discharge flow path 64 a in the cylinder row direction and is connected to the introduction oil path 63 a of the filter mounting boss portion 63. That is, the lubricating oil passage 65 b is connected to the outlet oil passage 63 b through the introduction oil passage 63 a and the main oil filter 16. The lubricating oil passage 65b, the introduction oil passage 63a, the main oil filter 16, and the outlet oil passage 63b are an example of an implementation configuration corresponding to the “first oil pan side passage” in the present invention.

  Next, in accordance with the operation of the internal combustion engine 1 configured as described above, the bearings that support the crankshaft CS, that is, the bearing surfaces 46 a of the support wall portions 46 of the cylinder block 4 and the bearing surfaces 34 a of the bearing cap 32 are supplied. The movement of the lubricating oil will be described with reference to FIGS. 17 and 18. When the internal combustion engine 1 is started, the crankshaft CS is rotated, and the oil pump OP is driven with the rotation of the crankshaft CS.

  Lubricating oil stored in the lower oil pan 8 by driving the oil pump OP flows into the suction flow path 64b through a strainer (not shown), and is discharged to the discharge flow path 64a by the pump gear PG, and from the discharge flow path 64a. It flows into the flow paths 65a and 65b. Until the rotational speed of the crankshaft CS reaches a predetermined rotational speed, the lubricating oil passage 65a and the supply oil passage 69a are in communication with each other by the solenoid valve 20, so that the lubricating oil flowing into the lubricating oil passage 65a is introduced. It flows into the supply oil passage 69a through the oil passage 67a, the sub oil filter 18, the connection oil passage 68, and the solenoid valve 20 (see FIGS. 11 and 12), and the bearing beam 52 of the bearing beam 52 passes through the piping 80 from the supply oil passage 69a. It flows into the oil passage 52a (see FIG. 14).

  The lubricating oil that has flowed into the oil passage 52a flows in the order of the diameter expansion hole 52c of the bearing beam 52, the diameter expansion hole 37b of the bearing cap 32, the communication hole 35c, and the diameter expansion hole 35a, and the bearing surface 34a via the communication groove 35b. (See FIG. 5).

  On the other hand, the lubricating oil that has flowed into the lubricating oil flow path 65b flows into the outlet oil path 63b through the introduction oil path 63a and the main oil filter 16 (see FIG. 12). The lubricating oil that has flowed into the lead-out oil path 63 b flows into the oil gallery 43 a through the supply oil path 43 c formed in the cylinder block 4. Here, the lubricating oil supply path to the oil gallery 43a and the lubricating oil supply path from the oil gallery 43a to each part of the internal combustion engine 1 (for example, a journal portion of a camshaft not shown, a timing chain, a valve timing mechanism, etc.) are compared. Therefore, it takes time until the lubricating oil supply path is filled with lubricating oil. Accordingly, the lubricating oil flowing into the oil gallery 43a is also finally supplied to the bearing surface 46a via the communication oil passage 43b, and each part of the internal combustion engine 1, for example, a cam (not shown) via the oil passage (not shown). Although it is supplied to the journal portion of the shaft, the timing chain, the valve timing mechanism, etc., it takes time until a sufficient amount of lubricating oil is supplied.

  As described above, until the rotational speed of the crankshaft CS reaches a predetermined rotational speed, lubrication is performed on each part of the internal combustion engine 1 including the bearing surface 46a (for example, a camshaft journal, a timing chain, a valve timing mechanism, etc., not shown). A lubricating oil supply path (lubricating oil flow path 65b → introducing oil path 63a → main oil filter 16 → outflow oil path 63b → cylinder block 4) having a relatively large flow path volume due to a structure for supplying (distributing) oil. Bearing oil path 43c → oil gallery 43a → communication oil path 43b and bearings in the internal combustion engine 1 (for example, oil paths to a camshaft journal, timing chain, valve timing mechanism, etc., not shown) Lubricating oil supply path dedicated to the surface 34a (lubricating oil flow path 65a → introducing oil path 67a → sub oil filter 18 → connection oil path 6 → Solenoid valve 20 → Supply oil passage 69a → Pipe 80 → Oil passage 52a of bearing beam 52 → Expansion hole 52c of bearing beam 52 → Expansion hole 37b of bearing cap 32 → Communication hole 35c → Expansion hole 35a → Communication groove 35b) is configured to supply lubricating oil to the bearing surface 34a (see arrows in FIGS. 17 and 18), and therefore the bearing (bearing surface 34a) that supports the crankshaft CS immediately after the internal combustion engine 1 is started. The lubricating oil can be supplied promptly.

  From the lubricating oil passage 65b to the introduction oil passage 63a, the main oil filter 16, the outlet oil passage 63b, the supply oil passage 43c formed in the cylinder block 4 and the oil gallery 43a, the communication oil passage 43b (from the bearing) and the internal combustion engine 1 corresponds to the “first lubricating oil passage” in the present invention, and from the lubricating oil passage 65a to the introduction oil passage 67a, the sub oil filter 18, the connection oil passage 68, and the solenoid valve 20. , Supply oil passage 69a, piping 80, oil passage 52a of bearing beam 52, diameter expansion hole 52c of bearing beam 52, diameter expansion hole 37b of bearing cap 32, communication hole 35c, diameter expansion hole 35a and communication groove 35b. The path through which the lubricating oil flows to the bearing surface 34a is an example of an implementation configuration corresponding to the “second lubricating oil flow path” in the present invention.

  Here, in the present embodiment, the predetermined rotational speed is the internal combustion engine 1 including the bearing surface 46a to such an extent that sufficient lubricating oil can be supplied from the oil gallery 43a to the bearing surface 46a via the communication oil passage 43b. Lubricating oil supply path (lubricating oil flow path 65b → introducing oil path 63a → main oil) for supplying (distributing) lubricating oil to each part (for example, camshaft journal section, timing chain, valve timing mechanism, etc., not shown) Filter 16 → Derived oil passage 63b → Supply oil passage 43c formed in the cylinder block 4 → Oil gallery 43a → Communication oil passage 43b and each part of the internal combustion engine 1 (for example, a camshaft journal portion, timing chain, valve timing not shown) The oil pressure in the oil passage) to the mechanism etc.) is set to a value that can be increased. In the present embodiment, the rotation speed of the crankshaft CS is formed by forming a plurality of teeth on the outer peripheral surface of a flywheel (not shown) fastened to the flange portion 28, and the plurality of teeth are measured by a rotation speed sensor (not shown). ) And calculated by calculation. A rotation speed sensor (not shown) is an example of an implementation configuration corresponding to the “detection device” in the present invention.

  When the rotational speed of the crankshaft CS becomes equal to or higher than the predetermined rotational speed, the solenoid valve 20 blocks communication between the lubricating oil flow path 65a and the supply oil path 69a, so that the lubricating oil discharged to the discharge flow path 64a. All flow from the lubricating oil passage 65b into the inlet oil passage 63a, the main oil filter 16, the outlet oil passage 63b, the supply oil passage 43c formed in the cylinder block 4, and the oil gallery 43a, and from the oil gallery 43a to the communication oil passage. 43b is supplied to the bearing surface 46a through the oil gallery 43a, and is supplied to each part of the internal combustion engine 1, for example, a camshaft journal, timing chain, valve timing mechanism, and the like through an oil passage (not shown). The As a result, after the rotation speed of the crankshaft CS becomes equal to or higher than the predetermined rotation speed, there is a failure in supplying lubricating oil to each part of the internal combustion engine 1 (for example, a cam shaft journal, a timing chain, a valve timing mechanism, etc., not shown). Generation | occurrence | production can be suppressed favorably.

  In the present embodiment, the supply oil passage 69a to which the electromagnetic valve 20 is mounted is connected to the oil passage 52a provided in the bearing beam 52 via the pipe 80, and the oil in each bearing cap 32 is connected from the oil passage 52a. Although the lubricating oil is supplied to the bearing surface 34a through the passages (the enlarged diameter hole 37b, the communicating hole 35c, the enlarged diameter hole 35a, and the communicating groove 35b), the present invention is not limited thereto. For example, as shown in the internal combustion engine 100 of the modified example illustrated in FIGS. 19 and 21, a supply oil passage 169 a to which the electromagnetic valve 20 is attached is provided as a relay oil passage 172 provided in the outer wall portion 62 a of the upper oil pan 106. The bearing surface 134a is connected to a distribution oil passage 152 provided in the cylinder block 104 through an oil passage (through holes 137b, 137a, diameter-expansion hole 135a) provided in each bearing cap 132 from the distribution oil passage 152. It is good also as a structure which supplies lubricating oil to.

  The upper oil pan 106 of the internal combustion engine 100 of the modified example is the above-described embodiment except that a supply oil passage 169a is provided instead of the supply oil passage 69a and a relay oil passage 172 is formed in the outer wall portion 62a. The upper oil pan 6 has the same hardware configuration. Therefore, in the modified upper oil pan 106, the same parts as those of the hardware configuration of the upper oil pan 6 of the present embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 19 and 21, the supply oil passage 169a is configured to extend from the outer wall portion 62b to the outer wall portion 62a. The end portion on the outer wall 62a side is connected to the relay oil passage 172 formed in the outer wall 62a. As shown in FIGS. 19 and 21, the relay oil passage 172 is configured to extend in the vertical direction (the vertical direction in FIGS. 19 and 21) on the outer wall 62 a, and one end thereof is connected to the supply oil passage 169 a. The other end of the upper oil pan 106 is connected to the fastening surface of the upper oil pan 106 to the cylinder block 104. The lubricating oil passage 65a, the introduction oil passage 67a, the sub oil filter 18, the connection oil passage 68, the solenoid valve 20, the supply oil passage 169a, and the relay oil passage 172 correspond to the “second oil pan side passage” in the present invention. It is an example of the implementation structure to do.

  The cylinder block 104 of the internal combustion engine 100 of the modified example has the same hardware configuration as the cylinder block 4 of the present embodiment described above except that the distribution oil passage 152 is provided. Therefore, the same reference numerals are given to the same parts of the cylinder block 104 of the modified example as the hardware configuration of the cylinder block 4 of the present embodiment, and the detailed description thereof is omitted. The distribution oil passage 152 is an example of an implementation configuration corresponding to the “second block side flow passage” in the present invention.

  As shown in FIG. 19, the distribution oil passage 152 is formed at a height position in the vicinity of the fastening surface to the upper oil pan 106 in the outer wall portion 42 c, and includes a main passage 152 a extending in the cylinder row direction, A plurality of bent flow paths 152b extending from the main flow path 152a toward the inside (the outer wall portion 42d side) of the internal combustion engine 100 and then extending downward (downward in FIG. 19). . As shown in FIG. 21, the side of the bent flow path 152b opposite to the side connected to the main flow path 152a is opened to a fastening surface to which the bearing cap 132 is fastened. The bent flow path 152b is provided at a position corresponding to each support wall portion 46 of the cylinder block 104. That is, four bent flow paths 152b are provided along the cylinder row direction.

  As shown in FIG. 22, the bearing cap 132 of the internal combustion engine 100 according to the modified example includes a substantially U-shaped main body portion 134 having a substantially semicircular bearing surface 134 a and a main body portion sandwiching the bearing surface 134 a. And a protruding portion 136 that protrudes from one side wall portion of the both side wall portions of 134.

  As shown in FIG. 22, a pair of insertion holes 134 b and 134 c for inserting a pair of bolts BLT <b> 1 and BLT <b> 1 are formed in the main body portion 134. The bearing surface 134 a constitutes a bearing that supports the crankshaft CS together with the bearing surface 46 a formed on each support wall portion 46. The pair of insertion holes 134b and 134c are provided on both side walls of the main body 134 so as to sandwich the bearing surface 134a, and are formed so as to penetrate from the lower surface 134e of the main body 134 to the fastening surface 134d to the support wall 46. ing. A diameter-expanded hole 135a having a diameter larger than that of the other part of the insertion hole 134b is formed in the part of the insertion hole 134b near the fastening surface 134d.

  As shown in FIG. 22, the protruding portion 136 extends from one side wall portion of the side wall portions of the main body portion 134 toward the side (in the direction away from the other side wall portion, the left side in FIG. 22). One of the surfaces along the extending direction forms part of the fastening surface 134d. A through hole 137a that penetrates from the projecting end to the bearing surface 134a and a through hole 137b that penetrates from the fastening surface 134d to the through hole 137a are formed in the projection 136. Of the opening of the through hole 137 a, the opening on the protruding end side (the left side in FIG. 22) of the protruding portion 136 is closed by the plug cap 139. When the bearing cap 132 is fastened to the support wall portion 46 of the cylinder block 104, the through hole 137 b is connected to a bent flow path 152 b formed in the support wall portion 46. The through holes 137a and 137b and the diameter-enlarged hole 135a are an example of an implementation configuration corresponding to the “first internal flow path” in the present invention.

  Next, bearings that support the crankshaft CS with the operation of the internal combustion engine 100 of the modified example configured as described above, that is, the bearing surfaces 46a of the support wall portions 46 of the cylinder block 104 and the bearing surfaces 134a of the bearing cap 132 are provided. The movement of the supplied lubricating oil will be described with reference to FIGS. Also in the internal combustion engine 100 of the modified example, when the internal combustion engine 100 is started and the crankshaft CS is rotated, each part of the internal combustion engine 100 including the bearing surface 46a until the rotational speed of the crankshaft CS reaches a predetermined rotational speed. Prior to a lubricating oil supply path having a relatively large flow path volume for supplying (distributing) lubricating oil to (for example, a camshaft journal portion, timing chain, valve timing mechanism, etc. (not shown)), Lubricating oil can be supplied to the bearing surface 134a from the lubricating oil supply path.

  Specifically, until the rotation speed of the crankshaft CS reaches a predetermined rotation speed, the lubricating oil discharged to the discharge flow path 64a by the oil pump OP and flowing into the lubricating oil flow path 65a is introduced into the introduction oil path 67a, the sub The oil flows into the supply oil passage 169a through the oil filter 18, the connection oil passage 68, and the solenoid valve 20 (see FIGS. 12, 13, and 20), and the cylinder block 104 of the cylinder block 104 passes from the supply oil passage 169a through the relay oil passage 172. It flows into the main flow path 152a of the distribution oil path 152 (see FIGS. 19, 21 and 23). The lubricating oil flowing into the main flow path 152a flows into the through hole 137a and the enlarged diameter hole 135a from the bent flow paths 152b through the through holes 137b of the bearing cap 132, and is supplied to the bearing surface 134a from the through holes 137a. (See FIG. 21 and FIG. 24).

  When the rotational speed of the crankshaft CS becomes equal to or higher than the predetermined rotational speed, the solenoid valve 20 blocks communication between the lubricating oil passage 65a and the supply oil passage 169a, and thus the internal combustion engine 1 of the present embodiment described above. Similarly, all of the lubricating oil discharged to the discharge flow path 64a is supplied from the lubricating oil flow path 65b to the introduction oil path 63a, the main oil filter 16, the lead-out oil path 63b, the supply oil path 43c formed in the cylinder block 104, The oil flows into the oil gallery 43a, is supplied from the oil gallery 43a to the bearing surface 46a through the communication oil passage 43b, and from the oil gallery 43a through an oil passage (not shown) of each part of the internal combustion engine 100, for example, a camshaft (not shown) Supplied to journal, timing chain, valve timing mechanism, etc.

  Note that the lubricating oil that is discharged to the discharge flow path 64a by the oil pump OP and flows into the lubricating oil flow path 65b before the rotation speed of the crankshaft CS reaches the predetermined rotation speed is also the internal combustion engine of the present embodiment. 1 flows into the lead-out oil passage 63b through the introduction oil passage 63a and the main oil filter 16 (see FIG. 12). The lubricating oil that has flowed into the lead-out oil path 63 b flows into the oil gallery 43 a through the supply oil path 43 c formed in the cylinder block 104. Here, the lubricating oil supply path to the oil gallery 43a and the lubricating oil supply path from the oil gallery 43a to each part of the internal combustion engine 100 (for example, a journal portion of a camshaft not shown, a timing chain, a valve timing mechanism, etc.) are compared. Therefore, it takes time until the lubricating oil supply path is filled with lubricating oil. Accordingly, the lubricating oil that has flowed into the oil gallery 43a is finally supplied to the bearing surface 46a via the communication oil passage 43b, and each part of the internal combustion engine 100, for example, a cam (not shown) via the oil passage (not shown). Although it is supplied to the journal portion of the shaft, the timing chain, the valve timing mechanism, etc., it takes time until a sufficient amount of lubricating oil is supplied.

  Also in the internal combustion engine 100 of the modified example described above, the lubricating oil can be quickly supplied to the bearing (bearing surface 134a) that supports the crankshaft CS immediately after the internal combustion engine 100 is started, and the crankshaft CS It is possible to satisfactorily suppress the occurrence of poor lubrication oil supply to each part of the internal combustion engine 100 (for example, a camshaft journal, a timing chain, a valve timing mechanism, etc., not shown) after the number of revolutions exceeds a predetermined number. it can.

  In the internal combustion engine 100 of the modified example described above, the lubricating oil discharged by the oil pump OP and flowing into the lubricating oil passage 65a is supplied from the supply oil passage 169a and the relay oil passage 172 provided in the upper oil pan 106 to the cylinder block 104. A bearing surface of the bearing cap 132 is supplied to the distribution oil passage 152 from the distribution oil passage 152 via the bearing cap 132 (specifically, the through hole 137b, the through hole 137a, the enlarged diameter hole 135a, and the through hole 137a). Although it is set as the structure supplied to 134a, it is not restricted to this. For example, a connection oil passage (not shown) that connects the bearing surface 46a provided on the support wall portion 46 of the cylinder block 104 and the distribution oil passage 152 is provided, and is discharged by the oil pump OP to the lubricating oil passage 65a. The lubricating oil that has flowed in is supplied from the supply oil passage 169a and the relay oil passage 172 provided in the upper oil pan 106 to the distribution oil passage 152 of the cylinder block 104, and the bearing is provided from the distribution oil passage 152 through the connection oil passage described above. It is good also as a structure supplied to the surface 46a.

  In the internal combustion engines 1 and 100 of the present embodiment and the modification described above, the lubricating oil flow paths 65a and 65b are provided in the upper oil pans 6 and 106, but the present invention is not limited thereto. For example, as shown in the internal combustion engine 200 of the modified example illustrated in FIG. 25, the lubricating oil flow paths 265a and 265b may be provided in the cylinder block 204 instead of the upper oil pan 206 instead of the lubricating oil flow paths 65a and 65b. good.

  In addition to the lubricating oil passages 265a and 265b, the cylinder block 204 of the internal combustion engine 200 according to the modified example includes an introduction oil passage 267a that is connected to the lubricating oil passage 265a and to which the sub oil filter 18 is attached, and an electromagnetic A supply oil passage 269a to which the valve 20 is mounted, a connection oil passage 268 that connects the introduction oil passage 267a and the supply oil passage 269a, a distribution oil passage 252 that is connected to the supply oil passage 269a, and the distribution oil passage 252 and the bearing surface 46a are connected to each other, a communication oil passage 235 is connected to the lubricating oil passage 265b, and an introduction oil passage 263a for introducing lubricating oil into a main oil filter (not shown), and a main oil filter (not shown) are connected. An outlet oil passage 263b through which lubricating oil after passing through the oil gallery, and an oil gallery 243a connected to the outlet oil passage 263b, A communicating oil passage 243b that connects communicating the oil gallery 243a and the bearing surface 46a, it is formed (see FIGS. 25 through 29).

  The lubricating oil passage 265a, the introduction oil passage 267a, the sub oil filter 18, the connection oil passage 268, the solenoid valve 20, the supply oil passage 269a, the distribution oil passage 252 and the communication oil passage 235 are defined as “third block side flow” in the present invention. It is an example of the implementation structure corresponding to "road". The lubricating oil passage 265b, the introduction oil passage 263a, the main oil filter (not shown), and the outlet oil passage 263b correspond to the “first block side passage” in the present invention, and the oil gallery 243a and the communication oil passage 243b are It is an example of the implementation structure corresponding to the "2nd block side flow path" in this invention.

  Lubricating oil passages 265a and 265b, distribution oil passage 252 and oil gallery 243a extend along the cylinder row direction as shown in FIG. As shown in FIGS. 28 and 29, the introduction oil passage 267a and the supply oil passage 269a extend in the horizontal direction (the left-right direction in FIG. 29) so as to be orthogonal to the lubricating oil passage 265a and the distribution oil passage 252. Yes.

  In the modified internal combustion engine 200, the oil pump housing 264 is attached to a front cover (not shown).

  When the internal combustion engine 200 of the modified example configured as described above is started and the crankshaft CS is rotated, each part of the internal combustion engine 200 including the bearing surface 46a (for example, for example, until the crankshaft CS rotates to a predetermined speed) (for example, Prior to the lubricating oil supply path for supplying (distributing) lubricating oil to a camshaft journal section, timing chain, valve timing mechanism, etc. (not shown), the bearing surface 46a is lubricated from the dedicated lubricating oil supply path. Oil can be supplied.

  Specifically, until the rotation speed of the crankshaft CS reaches a predetermined rotation speed, the lubricating oil discharged to the discharge flow path 264a by the oil pump OP and flowing into the lubricating oil flow path 265a is introduced into the introduction oil path 267a, The oil flows into the supply oil passage 269a through the oil filter 18, the connection oil passage 268 and the solenoid valve 20, and is supplied from the supply oil passage 269a to the bearing surface 46a through the distribution oil passage 252 and the communication oil passage 235 (FIG. 25). To FIG. 29).

  When the rotational speed of the crankshaft CS becomes equal to or higher than the predetermined rotational speed, the solenoid valve 20 blocks communication between the lubricating oil passage 265a and the supply oil passage 269a, and thus the internal combustion engine 1 of the present embodiment described above. Similarly to the internal combustion engine 100 of the modified example, all of the lubricating oil discharged to the discharge passage 264a is transferred from the lubricant passage 265b to the introduction oil passage 263a, the main oil filter (not shown), the outlet oil passage 263b, and the oil gallery 243a. Inflow and supplied from the oil gallery 243a to the bearing surface 46a through the communication oil passage 243b, and from the oil gallery 243a through an oil passage (not shown) to each part of the internal combustion engine 200, for example, a journal portion and timing of a camshaft (not shown) Supplied to chains and valve timing mechanisms.

  Note that the lubricating oil discharged to the discharge flow path 264a by the oil pump OP and flowing into the lubricating oil flow path 265b before the rotation speed of the crankshaft CS reaches the predetermined rotation speed is also the internal combustion engine of the present embodiment. As in the internal combustion engine 100 of 1 and the modified example, the oil flows into the outlet oil passage 263b via the introduction oil passage 263a and a main oil filter (not shown). Here, the lubricating oil supply path to the oil gallery 243a and the lubricating oil supply path from the oil gallery 243a to each part of the internal combustion engine 200 (for example, a camshaft journal, a timing chain, a valve timing mechanism, etc., not shown) are compared. Therefore, it takes time until the lubricating oil supply path is filled with lubricating oil. Therefore, the lubricating oil that has flowed into the lead-out oil passage 263b eventually flows into the oil gallery 243a formed in the cylinder block 204, and is supplied to the bearing surface 46a via the communication oil passage 243b. Is supplied to each part of the internal combustion engine 200, for example, a journal part of a camshaft not shown, a timing chain, a valve timing mechanism, etc., but it takes time until a sufficient amount of lubricating oil is supplied. .

  Also in the internal combustion engine 200 of the modified example described above, the lubricating oil can be quickly supplied to the bearing (particularly the bearing surface 46a) that supports the crankshaft CS immediately after the internal combustion engine 200 is started, and the crankshaft. It is possible to satisfactorily suppress the occurrence of poor lubrication oil supply to each part of the internal combustion engine 200 (for example, a camshaft journal, a timing chain, a valve timing mechanism, etc., not shown) after the number of rotations of the CS exceeds a predetermined number be able to.

  In the present embodiment and each of the above-described modifications, the opening / closing control of the electromagnetic valve 20 is performed based on whether or not the rotation speed of the crankshaft CS becomes a predetermined rotation speed, but the present invention is not limited thereto. For example, it is good also as a structure which performs opening / closing control of the solenoid valve 20 based on the presence or absence of the drive of the starter motor STM. In this case, while the starter motor STM is being driven, the electromagnetic valve 20 is controlled to be open so that the lubricating oil passages 65a and 265a and the supply oil passages 69a, 169a and 269a are in communication, and the starter motor STM is stopped driving. Sometimes, the solenoid valve 20 is controlled to be closed so that the communication between the lubricating oil passages 65a and 265a and the supply oil passages 69a, 169a and 269a is cut off.

  This embodiment shows an example for carrying out the present invention. Therefore, the present invention is not limited to the configuration of the present embodiment.

1 Internal combustion engine (internal combustion engine)
2 Cylinder head 4 Cylinder block (internal combustion engine body, cylinder block)
4a Lower deck 6 Upper oil pan (Internal combustion engine body, Upper oil pan)
8 Lower oil pan 10 Rocker cover 12 Intake manifold 14 Front cover 16 Main oil filter (first oil pan side flow path, first lubricating oil flow path)
18 Sub oil filter (2nd oil pan side flow path, 3rd block side flow path, 2nd lubricating oil flow path)
20 Solenoid valve (switching member, second oil pan side flow path, third block side flow path, second lubricating oil flow path)
22 journal portion 22a radial through hole 22b connecting hole 24 crank pin 26 crank arm 28 flange portion 32 bearing cap (bearing component)
34 Body 34a Bearing surface (second bearing surface)
34b Insertion hole 34c Insertion hole 34d Fastening surface 34e Lower surface 35a Diameter expansion hole (2nd lubricating oil flow path, 1st internal flow path)
35b Communication groove (second lubricating oil flow path, first internal flow path)
35c communication hole (second lubricating oil flow path, first internal flow path)
36 Projection part 37a Screw hole 37b Diameter expansion hole (2nd lubricating oil flow path, 1st internal flow path)
42a outer wall part 42b outer wall part 42b 'mounting flange 42c outer wall part 42d outer wall part 43a oil gallery (first lubricating oil flow path, first block side flow path)
43b Communication oil passage (first lubricating oil passage, first block side passage)
43c Supply oil passage (first lubricating oil passage, first block side passage)
44 Cylinder bore wall 44a Cylinder bore 44b Cylinder bore 44c Cylinder bore 46 Support wall 46a Bearing surface (first bearing surface)
52 Bearing beam (connection member)
52a Oil passage (second lubricating oil passage, second internal passage)
52b Insertion hole 52c Diameter expansion hole (2nd lubricating oil flow path, 2nd internal flow path)
54 Pipe member (second internal flow path)
62a outer wall portion 62b outer wall portion 62c outer wall portion 62d baffle plate 63 filter mounting boss portion 63a introduction oil passage (first lubricating oil passage, first oil pan side passage)
63b Lead oil passage (first lubricating oil passage, first oil pan side passage)
64 Oil pump housing 64a Discharge flow path (Discharge port of oil pump)
64b Suction channel 65a Lubricating oil channel (second lubricating oil channel, second oil pan side channel)
65b Lubricating oil channel (first lubricating oil channel, first oil pan side channel)
67 Filter mounting boss 67a Introducing oil passage (second lubricating oil passage, second oil pan side passage)
68 Connection oil passage (second lubricating oil passage, second oil pan side passage)
69 Valve mounting boss 69a Supply oil passage (second lubricating oil passage, second oil pan side passage)
70 Pipe member 80 Piping (second lubricating oil flow path)
100 Internal combustion engine (internal combustion engine)
104 Cylinder block (internal combustion engine body, cylinder block)
106 Upper oil pan (internal combustion engine body, upper oil pan)
132 Bearing cap (bearing component)
134 Body 134a Bearing surface (second bearing surface)
134b Insertion hole 134c Insertion hole 134d Fastening surface 134e Lower surface 135a Diameter expansion hole (2nd lubricating oil flow path, 1st internal flow path)
136 Protruding part 137a Through hole (second lubricating oil flow path, first internal flow path)
137b Through hole (second lubricating oil flow path, first internal flow path)
139 Plug cap 152 Distribution oil passage (second lubricating oil passage, second block side passage)
152a Main channel (second lubricating oil channel, second block side channel)
152b Bent channel (second lubricant channel, second block side channel)
169a Supply oil passage (second lubricating oil passage, second oil pan side passage)
172 Relay oil passage (second lubricating oil passage, second oil pan side passage)
200 Internal combustion engine (internal combustion engine)
204 Cylinder block (internal combustion engine body, cylinder block)
206 Upper oil pan (internal combustion engine body, upper oil pan)
235 communication oil passage (first lubricating oil passage, third block side passage)
243a Oil gallery (first lubricating oil flow path, second block side flow path)
243b Communication oil passage (first lubricating oil passage, second block side passage)
252 Distribution oil passage (second lubricating oil passage, third block side passage)
263a Introducing oil passage (first lubricating oil passage, first block side passage)
263b Derived oil passage (first lubricating oil passage, first block side passage)
264 Oil pump housing 264a Discharge flow path 265a Lubricating oil flow path (second lubricating oil flow path, third block side flow path)
265b Lubricating oil flow path (first lubricating oil flow path, first block side flow path)
267a Introducing oil passage (second lubricating oil passage, third block side passage)
268 connecting oil passage (second lubricating oil passage, third block side passage)
269a Supply oil passage (second lubricating oil passage, third block side passage)
CS Crankshaft (Crankshaft)
STM starter motor (starter motor)
BLT1 bolt BLT2 bolt OP Oil pump (oil pump)
PG pump gear

Claims (9)

An internal combustion engine body having a plurality of bearings;
A crankshaft rotatably supported by the plurality of bearings;
An oil pump that is driven as the crankshaft rotates;
A first lubricating oil passage configured to be supplied with lubricating oil discharged from the oil pump and distribute the supplied lubricating oil to each part of the internal combustion engine including the plurality of bearings;
A second lubricating oil flow path configured to supply lubricating oil discharged from the oil pump and supply the supplied lubricating oil to the plurality of bearings until a predetermined condition is satisfied;
An internal combustion engine. Further comprising a starter motor driven to start the internal combustion engine;
The internal combustion engine according to claim 1, wherein the second lubricating oil passage is configured to supply lubricating oil to the plurality of bearings until the starter motor is stopped as the predetermined condition. A detection device for detecting the rotation speed of the crankshaft;
The second lubricating oil passage is provided with lubricating oil for the plurality of bearings until the number of revolutions of the crankshaft detected by the detection device after the start of the internal combustion engine as the predetermined condition reaches a predetermined number of revolutions. The internal combustion engine according to claim 1, wherein the internal combustion engine is configured to supply the engine. The second lubricating oil passage is allowed to allow the lubricating oil discharged from the oil pump to flow into the plurality of bearings until the predetermined condition is satisfied, and when the predetermined condition is satisfied, the lubrication oil is lubricated. The internal combustion engine according to any one of claims 1 to 3, further comprising a switching member that prohibits oil from flowing into the plurality of bearings. The internal combustion engine body is composed of a cylinder block having a plurality of first bearing surfaces constituting the plurality of bearings, and an upper oil pan configured to be provided with the oil pump,
The first lubricating oil flow path has one end connected to the discharge port of the oil pump, and the first oil pan side provided in the upper oil pan so that the lubricating oil supplied from the discharge port flows toward the other end. A flow path, and one end connected to the first oil pan side flow path, to the cylinder block to distribute the lubricating oil supplied from the first oil pan side flow path to each part of the internal combustion engine including the plurality of bearings. A first block side flow path provided,
The second lubricating oil flow path has a first oil pan side flow path provided at the upper oil pan so that one end of the second lubricating oil flow path is connected to the discharge port and the lubricating oil supplied from the discharge port is supplied to the plurality of bearings. The internal combustion engine according to any one of claims 1 to 4. The cylinder block is fastened with a plurality of bearing components having a second bearing surface that constitutes the plurality of bearings together with the first bearing surface and coupled by a coupling member;
The bearing component has a first internal flow path having one end connected to the second bearing surface;
The connecting member is connected to the other end of the first internal flow path and has a second internal flow path connected to the second oil pan side flow path.
The second lubricating oil flow path is configured to supply the lubricating oil discharged from the discharge port from the second oil pan side flow path to the second bearing surface via the second and first internal flow paths. The internal combustion engine according to claim 5. The cylinder block has a second block side channel connected to the plurality of bearings and connected to the second oil pan side channel,
The second lubricating oil flow path is configured to supply lubricating oil discharged from the discharge port from the second oil pan side flow path to the plurality of bearings via the second block side flow path. The internal combustion engine according to claim 5. The cylinder block is fastened with a plurality of bearing components having second bearing surfaces that form the plurality of bearings together with the first bearing surface,
The bearing component has a first internal flow path having one end connected to the second bearing surface and the other end connected to the second block-side flow path,
The second lubricating oil flow path is configured so that the lubricating oil discharged from the discharge port passes through the second oil pan side flow path and the second block side flow path and the first internal flow path to the second bearing surface. The internal combustion engine according to claim 7, wherein the internal combustion engine is configured to be supplied to the engine. The internal combustion engine body includes a cylinder block having a plurality of first bearing surfaces constituting the plurality of bearings,
The first lubricating oil passage is connected to the discharge port of the oil pump at one end, and is provided in the cylinder block so that the lubricating oil supplied from the discharge port of the oil pump flows toward the other end. A side flow path and one end connected to the first block side flow path are provided in the cylinder block so as to distribute lubricating oil supplied from the first block side flow path to each part of the internal combustion engine including the plurality of bearings. A second block side flow path,
The second lubricating oil passage is connected to the discharge port of the oil pump at one end, and is provided in the cylinder block so as to supply the lubricating oil supplied from the discharge port of the oil pump to the plurality of bearings. The internal combustion engine according to claim 1, further comprising a block-side flow path.

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