JP2013053565A - Oil feeder of engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shower pipe structure having an easily treating shape in flowing and storage, while sufficiently supplying oil to respective parts of valve operating parts of respective cylinders from shower pipes.SOLUTION: This oil feeder of an engine includes a first shower pipe 26 branched off from an oil feeding main pipe on a cylinder head and injecting the oil toward the valve operating parts on the intake sides of the respective cylinders, and a second shower pipe 30 branched off from a separate part of the oil feeding main pipe and injecting the oil toward the valve operating parts on the exhaust sides of the respective cylinders. One shower pipe 26 is provided with an extension part 28 extending along the other shower pipe 30 by making a U-turn on the tip of the body part 27 of the one shower pipe. The body part 27 is provided with a plurality of delivery ports 120 turned to one side valve operating part on the intake side or the exhaust side. The extension part 28 is provided with a plurality of delivery ports 126 turned to the other side valve operating part, and the extension part 28 is connected to the other shower pipe 30 via connecting members 47-50.

Description

  The present invention relates to an oil supply device for an engine that supplies engine oil by spraying it from a shower pipe to a valve mechanism of the engine.

  An engine having a cylinder row, such as an in-line four-cylinder engine or a V-type six-cylinder engine, has an intake side valve mechanism that opens and closes an intake valve of each cylinder, and an exhaust side valve that opens and closes an exhaust valve of each cylinder. Each valve operating mechanism has a valve operating section composed of a cam, a rocker arm and the like for each cylinder.

  Further, as disclosed in, for example, Patent Document 1, oil is supplied to each valve portion on the intake side from a single linear shower pipe branched and extended from the oil supply main pipe, and each motion on the exhaust side is supplied. Oil may be supplied to the valve portion from another straight shower pipe extending from another portion of the oil supply main pipe.

JP 2008-038846 A

  However, since the technique of Patent Document 1 only sprays oil from the discharge port of a shower pipe disposed obliquely above the cam toward the cam surface at each valve operating portion, sliding between the cam and the rocker arm In some cases, the required amount of oil may not be supplied to the contact portion or the like.

  In order to cope with this problem, the shower pipe discharge port is arranged not only at an obliquely upper portion of the cam but also near the portion where the oil supply is required other than the cam surface, such as the sliding contact portion. It is conceivable to arrange the shower pipe in a meandering manner. However, since various members such as a cam shaft, a rocker arm, a cam cap, and a bolt are disposed above the cylinder head, it is difficult to meander the shower pipe while avoiding interference with these members. It is. In addition, the overall length of the shower pipe increases due to meandering, so that the discharge pressure at the end of the shower pipe tends to decrease, and the amount of oil supplied from the end may be insufficient.

  Further, instead of meandering the shower pipe, a plurality of linear shower pipes may be provided for each valve mechanism on the intake side or the exhaust side. However, in this case, since the oil supply from the oil supply main pipe to each shower pipe is dispersed, the discharge pressure of each shower pipe, in particular, the discharge pressure at the end portion tends to decrease.

  Furthermore, since the shower pipe structure composed of the shower pipe and the oil supply main pipe has a free end at the shower pipe, the shower pipe is meandered as described above, or a straight shower pipe. There is also a problem that the shape becomes difficult to handle during distribution and storage.

  Accordingly, the present invention provides an oil supply device for an engine that can sufficiently supply oil from the shower pipe to each part of the valve operating portion of each cylinder and obtain a shower pipe structure having a shape that is easy to handle during distribution and storage. It is an issue to provide.

  In order to solve the above-described problems, an oil supply device for an engine according to the present invention is configured as follows.

First, the invention according to claim 1 of the present application is
Branched from a predetermined portion of the oil supply main pipe fixed on the cylinder head and extended from one end side to the other end side in the cylinder row direction, and the oil is directed toward the valve portion on the intake side of each cylinder. A first shower pipe to be injected and a branching portion from a portion different from the predetermined portion of the refueling main pipe are extended from one end side to the other end side in the cylinder row direction, and the exhaust side of each cylinder An oil supply device for an engine, comprising: a second shower pipe that injects oil toward the valve portion of the engine;
One shower pipe of the first and second shower pipes has a main body portion extending from one end side to the other end side in the cylinder row direction and a U-turn at the front end of the main body portion along the other shower pipe. Extending from the other end side in the cylinder row direction toward the one end side,
The main body is provided with a plurality of discharge ports for discharging oil toward the valve operating portion on one side of the intake side or the exhaust side,
The extension portion is provided with a plurality of discharge ports for discharging oil toward the valve portion on the other side of the intake side or the exhaust side,
The extension portion is connected to the other shower pipe at a plurality of locations in the cylinder row direction via a connecting member.

The invention according to claim 2 is the invention according to claim 1,
Of the first or second shower pipe, the extension portion is provided in a shower pipe branched from the oil supply main pipe on the upstream side in the oil flow direction in the oil supply main pipe.

Further, the invention according to claim 3 is the invention according to claim 1 or 2,
Each valve portion on the intake side and exhaust side includes a cam follower that makes rolling contact with a cam portion of a camshaft extending in the cylinder row direction,
In addition to the cam follower, the valve portion on the other side of the intake side or the exhaust side further includes a slipper that is in sliding contact with the cam portion of the camshaft,
The discharge port of the extension portion is provided so as to discharge oil toward the slipper.

The invention according to claim 4 is the invention according to any one of claims 1 or 3,
The other shower pipe is disposed above the camshaft that drives the valve portion on the other side of the intake side or the exhaust side,
The extension is disposed on the side of the camshaft,
The connecting member is a plate-like member disposed so as to incline downward from the other shower pipe toward the extension and to extend in the cylinder row direction.

Furthermore, the invention according to claim 5 is the invention according to any one of claims 1 or 3,
An oil separator is provided above the valve portion on the other side of the intake side or exhaust side, and below the head cover that covers the top of the cylinder head,
The connecting member is formed of a plate-like member extending in the cylinder row direction, and is disposed in the vicinity of the gas introducing portion of the oil separator.

  First, according to the first aspect of the present invention, when oil is supplied from the first and second shower pipes branched from the oil supply main pipe to the valve portions on the intake side and the exhaust side, the intake side or the exhaust side One of the valve parts is supplied with oil from the discharge port of the main body of the first shower pipe, and the other valve part that requires more oil supply is only provided with the discharge port of the second shower pipe. In addition, since oil is supplied also from the discharge port of the extended portion provided by making the first shower pipe U-turn, sufficient lubrication can be achieved in all the valve operating portions.

  Moreover, since the extension part of the 2nd shower pipe is connected with the 1st shower pipe via the connection member, the shower pipe structure comprised by the oil supply main pipe and the 1st and 2nd shower pipe is provided. When circulating and storing, it is possible to prevent the shower pipes from shaking individually. Therefore, the entire shower pipe structure can be maintained with high strength, and the risk of deformation and breakage during distribution and storage is reduced.

  Further, according to the invention described in claim 2, since the extension portion is provided in the shower pipe branched from the upstream side portion of the oil supply main pipe among the first and second shower pipes, Oil can be fed into the extension part at a relatively high pressure, and a sufficiently high discharge pressure can be obtained at the tip part of the extension part. Moreover, the part from which the discharge pressure of the shower pipe branched from the downstream part of the oil supply main pipe falls compared with the shower pipe branched from the upstream part can be supplemented by oil supply from the extension part.

  According to the invention described in claim 3, since oil is supplied from the extension portion of the shower pipe toward the slipper that is easily worn by sliding contact with the cam portion, sufficient lubrication can be achieved for the slipper. it can.

  Furthermore, according to the invention described in claim 4, the connecting member is inclined downward from a shower pipe disposed above the camshaft toward an extension disposed on the side of the camshaft. Since it is a plate-like member, the mist oil generated at the valve operating portion can be effectively recovered by being transmitted along the lower surface of the connecting member.

  Further, according to the invention described in claim 5, since the connecting member made of a plate-like member is disposed in the vicinity of the gas introducing portion of the oil separator, the mist oil generated in the valve operating portion is introduced into the gas. Therefore, the amount of mist oil entering the oil separator is reduced, and the load on the oil separator can be reduced.

It is a top view which shows the oil supply apparatus of the engine which concerns on one Embodiment of this invention. It is a top view which shows the valve mechanism supplied with the oil supply apparatus shown by FIG. It is a top view which shows the shower pipe structure of the oil supply apparatus shown by FIG. FIG. 4 is a perspective view showing a connecting member that connects an extension part of an intake side shower pipe and an exhaust side shower pipe in the shower pipe structure shown in FIG. 3. It is the sectional view on the AA line of FIG. 1 which shows the fixing part of a shower pipe and a cam cap. It is the BB sectional view taken on the line of FIG. 1 in the state which attached the head cover. It is CC sectional view taken on the line of FIG. 1 which shows the valve part by the side of exhaust. It is the DD sectional view taken on the line of FIG. 1 which shows the positional relationship of an oil separator and a connection member.

  Hereinafter, embodiments of the present invention will be described.

  FIG. 1 is a plan view of an engine 1 equipped with a fueling device according to the present embodiment, as viewed from above, with the head cover 9 covering the top of the cylinder head 2 removed, and FIG. It is the top view which looked at the valve mechanism of 1 from upper direction.

  As shown in FIGS. 1 and 2, the engine 1 is an in-line four-cylinder engine having four cylinders 3 (3a, 3b, 3c, 3d) arranged in series. Extending intake and exhaust camshafts 6 and 8 are provided. The camshafts 6 and 8 are covered with a plurality of cam caps 60 and 70 from above, and the cam caps 60 and 70 are fixed to the cylinder head 2 with bolts 62, 64, 72 and 74. Camshafts 6 and 8 are fixed on the top. These camshafts 6 and 8 have sprockets 11 and 13 at their respective ends, and are connected to a crankshaft via a timing chain (not shown) wound around the sprockets 11 and 13.

  As shown in FIG. 2, each cylinder 3 is provided with two intake valves 86 for opening and closing the intake port 10a and two exhaust valves 96 and 97 for opening and closing the exhaust port 10b. Further, for each cylinder 3, the intake side valve operating portion 4 (4a, 4b, 4c, 4d) for opening / closing the intake valve 86 and the exhaust side valve operating portion 5 (5a) for opening / closing the exhaust valves 96, 97 are provided. , 5b, 5c, 5d).

  For each intake valve 86, the intake-side valve section 4 is disposed so as to abut on the cam portion 12 provided on the intake-side camshaft 6 and the cam portion 12 and the top of the intake valve 86. And a rocker arm 80.

  As shown in FIG. 6, the rocker arm 80 on the intake side is a so-called end pivot type rocker arm, and is supported by a lash adjuster 84 at the base end thereof, and the top of the intake valve 86 is in contact with the lower surface of the distal end. Is provided. Further, a cam follower 82 that is rotatable around an axis extending in the cylinder row direction is provided at the central portion of the rocker arm 80, and the cam follower 82 is disposed so as to contact the cam portion 12. Thereby, the cam follower 82 moves up and down as the cam portion 12 rotates, and the rocker arm 80 tilts accordingly. When the tip of the rocker arm 80 moves downward due to this tilting, the tip of the rocker arm 80 pushes the intake valve 86 downward against the urging force of the spring 88 to open the intake port 10a. Yes.

  On the other hand, as shown in FIG. 2, the exhaust-side valve section 5 includes cam portions 14 and 16 provided on the exhaust-side camshaft 8 for each exhaust valve 96 and 97, and the cam portions 14 and 16. Rocker arms 90 and 100 are provided so as to contact the tops of the exhaust valves 96 and 97.

  In each cylinder 3, a normal cam portion 14 and a rocker arm 90 are provided for one exhaust valve 96, and the exhaust valve 96 is opened only in the exhaust stroke. The other exhaust valve 97 is provided with a cam portion 16 and a rocker arm 100 constituting a variable lift mechanism, and the exhaust valve 97 opens not only in the exhaust stroke but also in the intake stroke. .

  As shown in FIG. 6, the rocker arm 90 corresponding to the one exhaust valve 96 has a structure similar to that of the rocker arm 80 on the intake side, and is supported by a lash adjuster 94 at the base end portion, and the bottom surface of the tip end portion. Is provided so that the top of the exhaust valve 96 abuts. Further, a cam follower 92 is provided at the center of the rocker arm 90, and the rocker arm 90 tilts as the cam follower 92 moves up and down as the cam portion 14 rotates. When the tip of the rocker arm 90 moves downward due to this tilting, the exhaust valve 96 is pushed downward against the urging force of the spring 98 to open the exhaust port 10b.

  On the other hand, as shown in FIG. 7, the rocker arm 100 corresponding to the other exhaust valve 97 includes an arm main body 102 having an opening 104 at the center in the cylinder row direction, and a center provided in the opening 104. Arm 105.

  The rocker arm 100 is also an end pivot type, and the base end portion of the arm main body 102 is supported by a lash adjuster 95, and the top portion of the exhaust valve 97 is in contact with the lower surface of the distal end portion 103 of the arm main body 102. . On the upper surface of the arm main body 102, both side portions in the cylinder row direction sandwiching the opening 104 are slippers 116 that are in sliding contact with high lift portions 18 and 19 (to be described later) of the cam portion 16.

  One end of the center arm 105 is rotatably supported by a shaft 106 extending in the cylinder row direction, and the other end of the center arm 105 is a free end. A lock mechanism 130 is provided between the center arm 105 and the arm main body 102, and the center arm 105 is fixed to the arm main body 102 by locking the lock mechanism 130. In addition, an opening 110 is provided at the center of the center arm 105, and a cam follower 114 that is rotatable around an axis 112 extending in the cylinder row direction is provided in the opening 110.

  Further, as shown in FIGS. 1 and 7, the cam portion 16 that constitutes the variable lift mechanism together with the rocker arm 100 includes a low lift portion 17 that forms a relatively small maximum lift amount and a low lift portion 17. And a pair of high lift portions 18 and 19 forming a large maximum lift amount, and the pair of high lift portions 18 and 19 are provided on both sides of the low lift portion 17 in the cylinder row direction.

  In a state where the free end of the center arm 105 is released from the arm body 102 by releasing the lock of the lock mechanism 130, a force for pushing down the cam follower 114 by the low lift portion 17 of the cam portion 16 is transmitted to the exhaust valve 97. Instead, the rocker arm 100 is tilted by the force by which the high lift portions 18 and 19 of the cam portion 16 push down the slipper 116, and the exhaust valve 97 is pushed down by a relatively large lift amount via the rocker arm 100. In each cylinder 3, the cam phase of the high lift portions 18 and 19 of the cam portion 16 is set so that the exhaust valve 97 is opened by the high lift portions 18 and 19 in the exhaust stroke.

  On the other hand, when the center arm 105 is fixed to the arm main body 102 by the locking mechanism 130 being locked, the high lift portions 18 and 19 of the cam portion 16 do not contact the slipper 116 of the rocker arm 100, and the rocker arm is exclusively used. When the low lift portion 17 of the cam portion 16 is brought into rolling contact with the 100 cam followers 114, the rocker arm 100 is tilted, and the exhaust valve 97 is pushed down through the rocker arm 100 with a relatively small lift amount. In each cylinder 3, the cam phase of the low lift portion 17 of the cam portion 16 is set so that the exhaust valve 97 is opened by the low lift portion 17 in the intake stroke. Accordingly, one of the pair of exhaust valves 96 and 97 of each cylinder 3 is driven so as to open not only in the exhaust stroke but also in the intake stroke, and thereby, the fuel vaporization at the cold start is performed. Has been promoted.

  As shown in FIG. 1, on the cylinder head 2, first and second shower pipes 26, 30 for supplying oil to the valve operating portions 4, 5 of each cylinder 3 configured as described above, An oil supply main pipe 21 for supplying engine oil to the shower pipes 26 and 30 is provided, and the oil supply main pipe 21 and the shower pipes 26 and 30 constitute the shower pipe structure 20.

  As shown in FIG. 3, the refueling main pipe 21 extends in a direction perpendicular to the cylinder row direction in plan view, and is connected to both ends of the refueling main pipe 21 by connecting portions 23 fixed to the upper surface of the cylinder head 2. 24 is provided. Each connecting portion 23, 24 has bolt insertion holes 23 a, 24 a, and oil passages in the cylinder head 2 and the oil supply main pipe 21 are provided by oil hole bolts 78, 79 inserted into the bolt insertion holes 23 a, 24 a. It is fixed on the cylinder head 2 in a state where it communicates with the internal oil passage (see FIG. 1).

  The first shower pipe 26 is branched from a predetermined portion of the refueling main pipe 21 and extends from one end side to the other end side in the cylinder row direction, and is connected to the valve portion 4 on the intake side of each cylinder 3. The second shower pipe 30 is branched from a portion different from the predetermined portion of the oil supply main pipe 21 and is extended from one end side to the other end side in the cylinder row direction. An exhaust-side shower pipe that extends toward the exhaust side and injects oil toward the valve-operating portion 5 on the exhaust side of each cylinder 3.

  The exhaust-side shower pipe 30 is disposed above the exhaust-side camshaft 8 (see FIG. 6). Discharge ports 122 and 124 are provided. In each cylinder 3 on the exhaust side, the discharge ports 122 and 124 are disposed at approximately the same position as the normal rocker arm 90 in the cylinder row direction and approximately the same position as the slipper 116 of the rocker arm 100 constituting the variable lift mechanism. Has been. The discharge port 122 positioned above the normal rocker arm 90 discharges oil toward the cam follower 92 of the rocker arm 90, and the discharge port 124 positioned above the slipper 116 discharges oil toward the slipper 116. It is provided to discharge.

  The exhaust-side shower pipe 30 is provided with a plurality of attachment pieces 34, 35, 36 for fixing the exhaust-side shower pipe 30 on the cylinder head 2 at intervals in the cylinder row direction. As shown in FIG. 5, the attachment piece 34 is extended laterally from the exhaust-side shower pipe 30 when viewed from the cylinder row direction, and a bolt 71 is provided on a projecting portion 71 projecting from the upper surface of the cam cap 70. It is fixed. The remaining mounting pieces 35 and 36 of the exhaust side shower pipe 30 are also extended laterally from the shower pipe 30 and fixed to the projecting portion 71 of the cam cap 70 by bolts 45 and 46, similarly to the mounting piece 34. .

  On the other hand, as shown in FIG. 3, the intake side shower pipe 26 is branched from the oil supply main pipe 21 upstream of the exhaust side shower pipe 30 in the oil flow direction of the oil supply main pipe 21. The intake-side shower pipe 26 has a main body 27 extending from one end to the other end in the cylinder row direction, and a U-turn toward the exhaust-side shower pipe 30 in a plan view at the tip of the main-body 27. It has an extension portion 28 extending from the other end side in the cylinder row direction toward the one end side along the exhaust side shower pipe 30, and a bent portion 29 connecting the distal end portion of the main body portion 27 and the proximal end portion of the extension portion 28. .

  The main body 27 is disposed so as to pass above the intake-side camshaft 6 (see FIG. 6), and a plurality of parts for discharging oil toward the intake-side valve section 4 are disposed below the main body 27. A discharge port 120 is provided. Each discharge port 120 is disposed at substantially the same position as the rocker arm 80 in the cylinder row direction, and is provided so as to discharge oil toward the cam surface of the cam portion 12.

  The main body 27 is provided with a plurality of attachment pieces 32 and 33 for fixing the main body 27 on the cylinder head 2 at intervals in the cylinder row direction. Each attachment piece 32, 33 extends sideways from the main body 27 when viewed from the cylinder row direction, and projects from the upper surface of the cam cap 60, similar to the attachment pieces 34, 35, 36 of the exhaust-side shower pipe 30. It is fixed to a protruding portion (not shown) with bolts 42 and 43 (see FIG. 1).

  The bent portion 29 connecting the main body portion 27 and the extension portion 28 is provided so as to be inclined downward from the main body portion 27 toward the extension portion 28, whereby the extension portion 28 is disposed lower than the main body portion 27. It has become so.

  As shown in FIG. 7, the extension portion 28 is disposed on the side of the camshaft 8 on the exhaust side. The extension portion 28 is provided with a plurality of discharge ports 126 for discharging oil toward the valve portion 5 on the exhaust side. Each discharge port 126 is disposed at substantially the same position as the slipper 116 of the rocker arm 100 constituting the lift variable mechanism in the cylinder row direction, and discharges oil from an obliquely upper side of the slipper 116 toward the slipper 116. Is provided.

  Thus, according to the present embodiment, the extension portion 28 is provided in the intake side shower pipe 26 for supplying oil to the valve portion 4 on the intake side, and the cam portion 16 is connected to the discharge port 126 of the extension portion 28. Since the oil is supplied toward the slipper 116 that is easily worn by the sliding contact, sufficient lubrication of the slipper 116 can be achieved.

  Further, since the intake side shower pipe 26 is branched from the oil supply main pipe 21 at the upstream side of the exhaust side shower pipe 30, the extension portion 28 is at a higher pressure than when the extension portion is provided in the exhaust side shower pipe 30. The oil can be fed into the nozzle 28 and a sufficiently high discharge pressure can be obtained at the tip of the extension 28. Further, since the discharge shower pipe 30 is branched from the downstream portion of the refueling main pipe 21, the discharge pressure becomes relatively low. However, the decrease in the discharge pressure can be compensated by the refueling from the extension portion 28. it can.

  As shown in FIG. 3, the extension 28 is connected to the exhaust-side shower pipe 30 at a plurality of locations in the cylinder row direction via connecting members 47, 48, 49, and 50. A plurality of connecting members 47 to 50 are provided at intervals in the cylinder row direction, and each of the connecting members 47 to 50 is a plate-like member disposed so as to extend in the cylinder row direction, and is adjacent to the cylinder row direction. Between the side cam caps 70 (see FIG. 1).

  FIG. 4 is a perspective view showing the connecting member 47. As shown in FIG. 4, the connecting member 47 is provided so as to be inclined downward from the exhaust-side shower pipe 30 toward the extension portion 28 of the intake-side shower pipe 26. Locking pieces 51 and 52 that are locked to the exhaust-side shower pipe 30 are provided at the upper end of the connecting member 47, and locking pieces 53 and 54 that are locked to the extension 28 at the lower end of the connecting member 47. , 55 are provided. Each of the locking pieces 51 to 55 has a circular arc shape corresponding to the outer diameter of the pipes 28 and 30 and can be easily locked to the pipes 30 and 28. Further, since a plurality of the locking pieces 51 to 55 are provided at intervals above and below the connecting member 47 in the cylinder row direction, the connecting member 47 can be stably attached to the pipes 28 and 30. it can.

  The connecting member 47 is provided with a plurality of ribs 56, 57, and 58 spaced in the cylinder row direction. Each of the ribs 56 to 58 is provided at substantially the same position as the locking pieces 51 to 55 in the cylinder row direction, and extends in a direction perpendicular to the cylinder row direction. By providing the ribs 56 to 58 in this way, the strength of the connecting member 47 is improved.

  Further, of the remaining three connecting members 48 to 50, the two connecting members 48 and 49 have the same structure as the connecting member 47 described above. The other connecting member 50 has a length in the cylinder row direction shorter than that of the connecting member 47 described above, the number of upper and lower locking pieces is one, and only one rib is provided. Except for this, it has the same structure as the connecting member 47 described above.

  As described above, according to the present embodiment, since the extension portion 28 is connected to the exhaust-side shower pipe 30 by the connecting members 47 to 50, the extension portion 28 can be extended without fixing the extension portion 28 on the cylinder head 2. The part 28 can be supported stably. Further, when the shower pipe structure 20 is distributed and stored, the extension portion 28 is connected to the exhaust side shower pipe 30 by the connecting members 47 to 50, so that the intake side shower pipe 26 and the exhaust side shower pipe 30 are connected. Since it can prevent shaking individually, it becomes easy to handle the shower pipe structure 20 at the time of distribution and storage.

  Incidentally, as shown in FIGS. 6 to 8, an oil separator 152 is provided above the valve unit 5 on the exhaust side and below the head cover 9. The oil separator 152 is formed above the baffle plate 150 by attaching a baffle plate 150 extending in the cylinder row direction to the inside of the head cover 9. In addition, gas introduction portions 154 of an oil separator 152 are formed between the baffle plate 150 and the head cover 9 at both ends in the length direction of the baffle plate 150 so that the upper and lower spaces sandwiching the baffle plate 150 communicate with each other. Yes.

  As shown in FIG. 8, the gas introduction part 154 is formed obliquely above the exhaust side camshaft 8, and in the vicinity of the gas introduction part 154, the baffle plate 150 removes the gas taken in from the gas introduction part 154. It has an inclined portion 150a inclined so as to be led obliquely upward.

  The connecting member 47 is disposed substantially parallel to the inclined portion 150a obliquely below the inclined portion 150a of the baffle plate 150. The connecting member 47 is disposed close to and obliquely below the gas introduction part 154 so as to shut off the exhaust side valve operating part 5 and the gas introduction part 154.

  In addition, the connection member 47 shown in FIG. 8 is disposed close to one of the two gas introduction portions 154, but similarly, the other gas introduction portion 154 includes another connection member 50. Closely arranged.

  Accordingly, the mist oil generated in the valve portion 5 on the exhaust side is blocked by the connecting members 47 and 50 before the gas introduction portion 154, so that the amount of mist oil entering the oil separator 152 is reduced, and the oil separator 152 Can reduce the load. Further, since the connecting members 47 and 50 are inclined, the mist oil droplets adhering to the lower surfaces of the connecting members 47 and 50 fall along the connecting members 47 and 50, and the mist oil is effectively removed. Can be recovered.

  While the present invention has been described with reference to the above-described embodiments, the present invention is not limited to the above-described embodiments.

  For example, in the above-described embodiment, the configuration has been described in which the extension portion 28 is provided in the intake side shower pipe 26 and the oil is injected from the extension portion 28 toward the valve portion 5 on the exhaust side. An extension part may be provided in the exhaust side shower pipe 30, and oil may be injected from the extension part toward the valve section 4 on the intake side.

  As described above, according to the present invention, a shower pipe structure having a shape that can sufficiently supply oil from the shower pipe to each part of the valve operating portion of each cylinder and that is easy to handle during distribution and storage is obtained. Therefore, there is a possibility of being suitably used in the manufacturing industry of a vehicle engine that supplies oil from the shower pipe to the valve operating portion of each cylinder, and the manufacturing industry of a vehicle equipped with this engine.

DESCRIPTION OF SYMBOLS 1: Engine, 2: Cylinder head, 4: Inlet side valve part, 5: Exhaust side valve part, 6: Intake side camshaft, 8: Exhaust side camshaft, 9: Head cover, 12, 14, 16 : Cam portion, 17: Low lift portion, 18, 19: High lift portion, 20: Shower pipe structure, 21: Refueling main pipe, 26: Intake side shower pipe (first shower pipe), 27: Main body portion, 28: extension portion, 30: exhaust side shower pipe (second shower pipe), 47, 48, 49, 50: connecting member, 82, 92, 114: cam follower, 86: intake valve, 96, 97: exhaust valve, 116: Slipper, 120: Discharge port of main body of intake side shower pipe, 124: Discharge port of exhaust side shower pipe, 126: Discharge port of extension part of intake side shower pipe, 150: Baffle plate, 152 Oil separator, 154: gas introducing portion.

Claims (5)

Branched from a predetermined portion of the oil supply main pipe fixed on the cylinder head and extended from one end side to the other end side in the cylinder row direction, and the oil is directed toward the valve portion on the intake side of each cylinder. A first shower pipe to be injected and a branching portion from a portion different from the predetermined portion of the refueling main pipe are extended from one end side to the other end side in the cylinder row direction, and the exhaust side of each cylinder An oil supply device for an engine, comprising: a second shower pipe that injects oil toward the valve portion of the engine;
One shower pipe of the first and second shower pipes has a main body portion extending from one end side to the other end side in the cylinder row direction and a U-turn at the front end of the main body portion along the other shower pipe. Extending from the other end side in the cylinder row direction toward the one end side,
The main body is provided with a plurality of discharge ports for discharging oil toward the valve operating portion on one side of the intake side or the exhaust side,
The extension portion is provided with a plurality of discharge ports for discharging oil toward the valve portion on the other side of the intake side or the exhaust side,
The oil supply device for an engine, wherein the extension portion is connected to the other shower pipe at a plurality of locations in the cylinder row direction via a connecting member.   The said extension part is provided in the shower pipe branched from the said oil supply main pipe in the flow direction upstream of the oil in the said oil supply main pipe among the said 1st or 2nd shower pipe, The extension part is provided. Item 4. A fueling device for an engine according to Item 1. Each valve portion on the intake side and exhaust side includes a cam follower that makes rolling contact with a cam portion of a camshaft extending in the cylinder row direction,
In addition to the cam follower, the valve portion on the other side of the intake side or the exhaust side further includes a slipper that is in sliding contact with the cam portion of the camshaft,
The engine fueling device according to claim 1 or 2, wherein a discharge port of the extension portion is provided so as to discharge oil toward the slipper. The other shower pipe is disposed above the camshaft that drives the valve portion on the other side of the intake side or the exhaust side,
The extension is disposed on the side of the camshaft,
The said connecting member is a plate-shaped member arrange | positioned so that it may incline below toward the said extension part from said other shower pipe, and may be extended in a cylinder row direction. The engine oil supply device according to any one of the above. An oil separator is provided above the valve portion on the other side of the intake side or exhaust side, and below the head cover that covers the top of the cylinder head,
The said connecting member consists of a plate-shaped member extended in a cylinder row direction, and is arrange | positioned in the vicinity of the gas introduction part of the said oil separator, The any one of Claims 1-3 characterized by the above-mentioned. Engine refueling device.

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