JP4432664B2 - Lubricating device for internal combustion engine - Google Patents

Description

  The present invention relates to a lubricating device for an internal combustion engine.

  Conventionally, in order to drive an intake valve and an exhaust valve in an internal combustion engine, a valve operating mechanism that opens and closes the intake valve and the exhaust valve by a cam provided on a rotating cam shaft is used. In such a mechanism, a rocker arm is widely used as a member for converting the rotational movement of the cam into the reciprocating movement of the intake valve and the exhaust valve. Here, the magnitude of the sliding resistance and the wear resistance of the sliding portions of the rocker arm and cam greatly affect the performance of the internal combustion engine. Therefore, a lubrication device for reducing the sliding resistance of the rocker arm and the sliding portion of the cam and improving the wear resistance is required. On the other hand, in order to lubricate the sliding surface of the rocker arm and / or cam, a lubricating device provided with an oil supply passage arranged above the cam shaft and supplying lubricating oil to the sliding portion of the rocker arm and / or cam is proposed. (For example, refer to Patent Document 1).

  On the other hand, an internal combustion engine having a valve timing changing device that changes the opening and closing timings of an intake valve and an exhaust valve during operation of the internal combustion engine is known. This valve timing changing device is disposed between a pulley driven by rotation of a crankshaft and a camshaft, and oil is supplied to an advance chamber or a retard chamber provided in the valve timing control device by a control valve. Alternatively, the cam shaft is advanced or retarded with respect to the pulley by being interrupted. In this way, the valve timing is changed by changing the rotational phases of the exhaust and intake camshafts.

  Here, conventionally, the lubricating oil for lubricating the sliding portion of the rocker arm and / or the cam and the lubricating oil used for controlling the valve timing changing device are separate systems, both of which are separately supplied by the oil pump. It had been. For this reason, it is difficult to reduce the discharge amount of the lubricating oil by the oil pump as a whole, and it is difficult to reduce the drive loss of the oil pump and to reduce the size of the oil pump.

On the other hand, a technique has been proposed in which the lubricating oil used for controlling the valve timing changing device is supplied to a power transmission member for connecting the intake side camshaft and the exhaust side camshaft in a synchronously rotatable manner. (For example, refer to Patent Document 2). However, this technique also does not disclose the point of lubricating the rocker arm or the sliding portion of the cam, and does not disclose the problem of reducing the drive loss of the oil pump.
JP-A-8-28235 Japanese Patent Laid-Open No. 10-2208 JP 10-317925 A

  An object of the present invention is to provide an internal combustion engine that changes the opening and closing timing of the intake and exhaust valves by sending and receiving lubricating oil between the control valve and the valve timing changing device. It is an object of the present invention to provide a technique capable of reducing the discharge amount of an oil supply pump that supplies lubricating oil to a rocker arm or a cam in a mechanism.

In order to achieve the above object, the present invention provides a valve timing changing device using the control valve in an internal combustion engine that changes the opening and closing timing of the intake and exhaust valves by transferring lubricating oil between the control valve and the valve timing changing device. The greatest feature is that the lubricating oil used for the control is used for lubricating the rocker arm and / or cam in the valve mechanism of the internal combustion engine.

More specifically, a valve timing changing device that changes the opening and closing timing of the intake and exhaust valves of the internal combustion engine by supplying or discharging lubricating oil;
The valve timing changing device is controlled by supplying lubricating oil to the valve timing changing device, collecting the lubricating oil discharged from the valve timing changing device, or shutting off the supplied or discharged lubricating oil. And a control valve for discharging the lubricating oil used for controlling the valve timing changing device,
And a lubricating oil supply passage for supplying the lubricating oil discharged from the control valve to a rocker arm and / or a cam in a valve operating mechanism of the internal combustion engine.

  That is, in an internal combustion engine that changes the valve timing of the internal combustion engine by exchanging lubricating oil discharged from the oil supply pump between the control valve and the valve timing changing device, the control valve is provided in the valve timing control device. The lubricant oil is supplied to one of the advance chamber and the retard chamber, and the lubricant oil is discharged from the other of the advance chamber and the retard chamber, or the lubricant oil is shut off, thereby camming the pulley. Advance or retard the axis. Here, when the lubricating oil is supplied from the control valve to the advance chamber, the advance chamber is expanded and the retard chamber is reduced. On the contrary, when the lubricating oil is supplied from the control valve to the retard chamber, the retard chamber is expanded and the advance chamber is contracted. Then, the lubricant oil in the reduced retard chamber or advance chamber is collected by the control valve and discharged from the control valve. Further, when lubricating oil is not supplied from the control valve to the valve timing changing device, the lubricating oil discharged from the oil supply pump is discharged as it is from the control valve.

  Conventionally, the lubricating oil discharged from the control valve as described above has been directly collected in the oil pan. However, in the present invention, this is not directly collected in the oil pan, but is supplied to the rocker arm and / or cam in the valve operating mechanism of the internal combustion engine via the lubricating oil supply passage.

  Then, since the lubricating oil from the control valve that was not originally used for lubrication can be used for lubricating the rocker arm and / or cam, the lubricating oil is separately supplied to the rocker arm and / or cam from the oil supply pump. There is no need to do it. As a result, the discharge amount of the oil supply pump can be suppressed. In addition, this makes it possible to reduce the size of the oil pump and reduce the oil pump drive loss.

  In the present invention, a volume portion for storing the lubricating oil discharged from the control valve may be provided between the control valve and the lubricating oil supply passage.

  Here, the amount of lubricating oil discharged from the control valve may vary depending on the operating state of the internal combustion engine and the valve timing change amount in the valve timing change device. Therefore, there may be a difference between the amount of lubricating oil discharged from the control valve and the amount of lubricating oil that passes through the lubricating oil supply passage and is supplied to the rocker arm and / or cam. In such a case, for example, the lubricating oil collected from the valve timing changing device to the control valve is not smoothly discharged from the control valve, and as a result, the operation of the valve timing changing device may be affected.

Therefore, in the present invention, a volume portion for storing the lubricating oil discharged from the control valve is provided between the control valve and the lubricating oil supply passage. By doing so, there is a difference between the amount of lubricant discharged from the control valve and the amount of lubricant supplied to the rocker arm and / or cam through the lubricant supply passage. Even if it exists, since the difference lubricating oil is stored in the volume part, the amount of the lubricating oil discharged from the control valve and the lubricating oil supplied to the rocker arm and / or the cam through the lubricating oil supply passage It can suppress that the difference between the amount of oil affects the operation | movement of the said valve timing change apparatus.

  In the present invention, the lubricating oil supply passage may be provided so as to be inclined so that the height decreases as the distance from the control valve increases.

  In this way, the lubricating oil discharged from the control valve flows smoothly toward the lower side of the lubricating oil supply passage, in other words, toward the far side from the control valve. As a result, it is possible to suppress the lubricating oil discharged from the control valve from staying in the lubricating oil supply passage, and to prevent the lubricating oil from being difficult to be discharged from the control valve. As a result, it is possible to suppress the lubricating oil staying in the lubricating oil supply passage from affecting the operation of the valve timing changing device.

  In the present invention, the lubricating oil supply passage may be provided independently for each cylinder of the internal combustion engine.

  This eliminates the need for a configuration for supplying the lubricating oil to the rocker arm and / or cam in the other cylinders in the lubricating oil supply passage corresponding to each cylinder. can do. In addition, since the structure of each lubricating oil supply passage can be determined independently so that the optimum amount of lubricating oil can be supplied to the rocker arm and / or cam in each cylinder, the rocker arm and / or the entire internal combustion engine is more efficient. Alternatively, lubricating oil can be supplied to the cam.

  In the present invention, the lubricating oil supply passage is provided with a lubricating oil supply hole for dropping the lubricating oil to the rocker arm and / or the cam in each cylinder of the internal combustion engine. You may make it have the large hole diameter, so that the said lubricating oil supply hole arrange | positioned in a distant position.

  Here, the lubricating oil supply passage may be provided with a lubricating oil supply hole for dropping the lubricating oil passing through the lubricating oil supply passage to the rocker arm and / or the cam in each cylinder of the internal combustion engine. By doing so, the lubricating oil discharged from the control valve passes through the lubricating oil supply passage, and is discharged from the control valve by a simple structure of dropping from the lubricating oil supply hole to the rocker arm and / or the cam. The lubricating oil can be smoothly supplied to the rocker arm and / or the cam.

  In this case, the lubricating oil supply hole arranged at a position farther from the control valve may have a larger hole diameter. For example, when the lubricating oil supply passage is provided independently for each cylinder, the lubricating oil supply hole provided in the lubricating oil supply passage corresponding to the cylinder disposed at a position far from the control valve. Has a larger hole shape as compared with a lubricating oil supply hole provided in a lubricating oil supply passage corresponding to a cylinder disposed closer to the control valve. Further, for example, when one lubricating oil supply passage is configured to drop the lubricating oil onto rocker arms and / or cams in a plurality of cylinders, the same lubricating oil supply passage is provided with a plurality of lubricating oil supplies. A plurality of lubricating oil supply holes are provided, and the lubricating oil supply holes for the cylinders arranged farther from the control valve have a larger hole diameter.

Then, it is difficult for the lubricating oil to reach, and it is possible to drop the lubricating oil from the large hole to the rocker arm and / or the cam in the cylinder arranged at a position far from the control valve. Lubricating oil can be dripped from a small hole to a rocker arm and / or a cam in a cylinder that is easily reached and located near the control valve. As a result, regardless of the distance from the control valve, the rocker arm in each cylinder and / or
Alternatively, substantially the same amount of lubricating oil can be supplied to the cam.

  In particular, when one lubricating oil supply passage is configured to drop the lubricating oil on rocker arms and / or cams in a plurality of cylinders, it corresponds to a cylinder disposed at a position close to the control valve. By dripping the lubricating oil from the lubricating oil supply hole, it is possible to suppress the shortage of the lubricating oil dripping from the lubricating oil supply hole corresponding to the cylinder disposed at a position far from the control valve. .

  The means for solving the above-described problems of the present invention can be used in combination as much as possible.

  In the present invention, in the internal combustion engine that changes the opening / closing timing of the intake / exhaust valve by transferring lubricating oil between the control valve and the valve timing changing device, in the control valve and the valve operating mechanism of the internal combustion engine The discharge amount of the oil supply pump that supplies lubricating oil to the rocker arm or cam can be reduced.

  The best mode for carrying out the present invention will be exemplarily described in detail below with reference to the drawings.

  FIG. 1 is a schematic diagram showing the configuration of a lubricating device for an internal combustion engine according to this embodiment. In FIG. 1, lubricating oil (hereinafter referred to as engine oil) accumulated in the oil pan 1 is sucked from the oil strainer 2 by the suction force generated by the operation of the oil pump 3, passes through the oil filter 5, and then enters the main gallery 6. And is supplied to the refueling place of the internal combustion engine. The main gallery 6 branches into a crank journal oiling hole 7, a cylinder head oiling hole 8, and an oil control valve oiling hole 10. The engine oil that has passed through the crank journal oil supply hole 7 is supplied to a bearing portion of a crankshaft (not shown). The engine oil that has passed through the cylinder head oil supply hole 8 is further supplied to the bearing portion of the camshaft through the cam journal oil supply hole 9. Further, the engine oil that has passed through the oil control valve oil supply hole 10 is supplied to an oil control valve (hereinafter abbreviated as OCV) 11. In addition, OCV11 comprises the control valve in a present Example.

  The OCV 11 is connected to the valve timing changing device 14 by a valve timing advance oil passage 12 and a valve timing retard oil passage 13. When the engine oil is exchanged between the OCV 11 and the valve timing changing device 14 via the valve timing advance oil passage 12 and the valve timing retard oil passage 13, the camshaft 19 with respect to a pulley (not shown). Is changed, and the valve timing is changed.

  Further, a lubricating oil discharge passage 15 is connected to the OCV 11 so that the engine oil used for controlling the valve timing changing device 14 by the OCV 11 is discharged from the OCV 11 through the lubricating oil discharge passage 15. Yes.

  A volume portion 16 is provided downstream of the lubricating oil discharge passage 15 so that the engine oil discharged from the OCV 11 can be temporarily stored. Further, a lubricating oil supply passage 17 is connected to the volume portion 16. On the opposite side of the lubricating oil supply passage 17 from the volume portion 16, a lubricating oil supply hole 18 is provided for dropping engine oil to a rocker arm 21 and a cam nose 20 provided on the camshaft 19 in each cylinder.

  Here, all of the engine oil that passes through the crank journal oil supply hole 7, the cylinder head oil supply hole 8, and the oil control valve oil supply hole 10 is discharged and pumped by the oil pump 3. The flow rate is controlled.

  Next, the operation of the OCV 11 and the valve timing changing device 14 will be described with reference to FIG. As shown in FIG. 2, the casing 41 of the OCV 11 is provided with first and second supply / discharge ports 42 and 43, first and second discharge ports 44 and 45, and a supply port 46. . A spool 48 that is urged in one direction by a coil spring 47 is provided in the casing 41. The spool 48 is provided with four valve portions 49. The casing 41 is provided with an electromagnetic solenoid 50.

  In the demagnetized state of the electromagnetic solenoid 50, the spool 48 is disposed at one end (right side in FIG. 2) of the casing 41 by the elastic force of the coil spring 47. Then, the first supply / discharge port 42 and the first discharge port 44 communicate with each other, and the second supply / discharge port 43 communicates with the supply port 46. Further, when the electromagnetic solenoid 50 is excited, the spool 48 is disposed at the other end of the casing 41 against the elastic force of the coil spring 47. Then, the second supply / discharge port 43 communicates with the second discharge port 45, and the first supply / discharge port 42 communicates with the supply port 46. Further, when the power supply to the electromagnetic solenoid 50 is controlled and the spool 48 is positioned between the one end and the other end of the casing 41, the first and second supply / discharge ports 42 and 43 are closed.

  The valve timing retardation oil passage 13 and the valve timing advance oil passage 12 are connected to the first and second supply / discharge ports 42 and 43. The valve timing advance oil passage 12 is connected to the advance chamber 14a in the valve timing change device 14, and the valve timing retard oil passage 13 is connected to the retard chamber 14b in the valve timing change device 14. ing. An oil control valve supply hole 10 is connected to the supply port 46. Further, a lubricating oil discharge passage 15 is connected to the first and second discharge ports 44 and 45.

  Here, when the spool 48 shown in FIG. 2 is positioned at one end of the casing 41, the engine oil is supplied to the advance chamber 14a of the valve timing changing device 14 through the valve timing advance oil passage 12. The engine oil in the retard chamber 14b of the valve timing changing device 14 is recovered by the OCV 11 through the valve timing retarding oil passage 13. Then, the valve timing changing device 14 advances the camshaft 19 that rotates in synchronization with a crankshaft (not shown) with respect to the crankshaft, thereby speeding up the opening / closing timing of the valve. The engine oil collected in the OCV 11 from the retard chamber 14 b of the valve timing changing device 14 is discharged through the lubricating oil discharge passage 15.

  On the other hand, when the spool 48 is positioned at the other end of the casing 41, the engine oil is supplied to the retard chamber 14b of the valve timing change device 14 via the valve timing retard oil passage 13, and the valve timing change device. The engine oil in the 14 advance angle chambers 14 a is recovered by the OCV 11 through the valve timing advance oil passage 12. Then, the valve timing changing device 14 retards the camshaft 19 that rotates in synchronization with a crankshaft (not shown) with respect to the crankshaft, thereby delaying the valve opening / closing timing. Also in this case, the engine oil collected in the OCV 11 from the advance angle chamber 14 a of the valve timing changing device 14 is discharged through the lubricating oil discharge passage 15.

Further, when the spool 48 is positioned between the one end and the other end of the casing 41, the engine oil in the oil control valve oil supply hole 10 is directly sent to the lubricating oil discharge passage 15 via a relief valve (not shown). . Therefore, engine oil is always discharged from the lubricating oil discharge passage 15.

  Conventionally, the engine oil sent to the lubricating oil discharge passage 15 is recovered as it is in an oil pan. On the other hand, the lubrication of the sliding portion of the cam nose 20 and the rocker arm 21 provided on the camshaft 19 branches off the passage of engine oil separately from the main journal 6, and the rocker arm 21 and the cam nose from the shower pipe provided at the tip. 20 by supplying engine oil.

  Thus, conventionally, the engine oil sent to the lubricating oil discharge passage 15 has not been used effectively, and the sliding portions of the rocker arm 21 and the cam nose 20 have been separately lubricated, so that the oil pump 3 discharges. It was difficult to reduce the amount, and it was difficult to reduce the drive loss of the oil pump 3 and to reduce the size of the oil pump 3.

  Therefore, in the present embodiment, the engine oil sent to the lubricating oil discharge passage 15 is effectively used by supplying it to the sliding portions of the rocker arm 21 and the cam nose 20 via the lubricating oil supply passage 17. did.

  That is, in this embodiment, the engine oil sent to the lubricating oil discharge passage 15 is once introduced into the volume portion 16. Then, the lubricating oil supply passage 17 connected to the volume portion 16 is passed. Then, engine oil is supplied to the rocker arm 21 and the cam nose 20 of each cylinder by dripping the engine oil from the lubricant oil supply hole 18 disposed above the rocker arm 21 and the cam nose 20 of the cylinder in the lubricating oil supply passage 17. It was decided to.

  Here, the volume 16 is provided between the lubricating oil discharge passage 15 and the lubricating oil supply passage 17 because the amount of engine oil discharged from the lubricating oil discharge passage 15 is changed from the lubricating oil discharge hole 18 to the rocker arm 21. In addition, when the amount of engine oil dripped onto the cam nose 20 is increased, the engine oil discharge from the lubricating oil discharge passage 15 is prevented from being hindered, and the operation of the valve timing changing device 14 is affected. This is to suppress the spread.

  Further, as shown in FIG. 1, the lubricating oil supply passage 17 in the present embodiment is attached with an inclination so that the height decreases as the distance from the control valve 11 increases. By doing so, the engine oil discharged from the lubricating oil discharge passage 15 and stored in the volume portion 16 can flow more smoothly above the rocker arm 21 and the cam nose 20.

  Further, in the present embodiment, a plurality of lubricating oil supply holes 18 are provided at positions corresponding to the rocker arm 21 and the cam nose 20 in each cylinder of the internal combustion engine. The hole diameters of the plurality of lubricating oil supply holes 18 are OCV11. The lubricating oil supply hole 18 arranged farther from the distance is larger. Therefore, when the engine oil flowing through the lubricating oil supply passage 17 is dropped in order from the hole closer to the OCV 11, the amount of engine oil dripped from the lubricating oil supply hole 18 on the most distal side is small. It can suppress becoming.

  FIG. 3 is a cross-sectional view illustrating the lubricating device in the present embodiment in more detail. 3 is a cross-sectional view of the control valve shown in FIG. 2 as viewed from the axial direction. The internal combustion engine shown in FIG. 3 is an in-line four-cylinder internal combustion engine, and FIG. 3 shows portions corresponding to two cylinders closer to the OCV 11 among the four cylinders. In FIG. 3, the camshaft 19 rotates in conjunction with a crankshaft (not shown). The cam noses 20a and 20b provided on the camshaft 19 open and close the intake valve of the first cylinder closest to the OCV11, and the cam noses 20c and 20d open and close the intake valve of the second cylinder closest to the OCV11. .

Here, below the cam noses 20a and 20b, rocker arms 21a and 21b for converting the rotational motion of the camshaft 19 into reciprocating motion are provided. Then, the rocker arms 21a and 21b reciprocate to press the valve stems 25a and 25b of the intake valve, thereby opening and closing the intake valve of the first cylinder. Similarly for the second cylinder, the cam noses 20c and 20d rotate to reciprocate the rocker arms 21c and 21d, thereby pressing the valve stems 25c and 25d to open and close the intake valves.

  The OCV 11 is connected to a lubricating oil discharge passage 15 and is further connected to a lubricating oil supply passage 17 via a volume portion 16. Here, as described above, the volume portion 16 is configured so that the amount of engine oil discharged from the lubricating oil discharge passage 15 is smaller than the amount of engine oil dropped from the lubricating oil discharge hole 18 onto the rocker arm 21 and the cam nose 20. Even when the amount increases, the engine oil is prevented from being discharged from the lubricating oil discharge passage 15. In the present embodiment, the bottom surface of the volume portion 15 and the upstream bottom surface of the lubricating oil supply passage 17 have the same height, but the bottom surface of the volume portion 15 is set lower than the upstream bottom surface of the lubricating oil supply passage 17. Alternatively, a predetermined amount of lubricating oil may always be stored in the volume portion 16.

  Further, the lubricating oil supply passage 17 is provided so as to be inclined such that the height decreases as the distance from the OCV 11 increases. A first lubricating oil supply hole 18 a having a nozzle shape protruding from the lubricating oil supply passage 17 is provided in the lubricating oil supply passage 17 above the rocker arm 21 a and the cam nose 20 a. Similarly, the second lubricating oil supply hole 18b is above the rocker arm 21b and the cam nose 20b, the third lubricating oil supply hole 18c is above the rocker arm 21c and the cam nose 20c, and above the rocker arm 21d and the cam nose 20d. A fourth lubricating oil supply hole 18d is provided.

  Here, since each of the lubricating oil supply holes 18a to 18d has a nozzle shape, the engine oil can be more reliably dropped onto the rocker arms 21a to 21d and the cam noses 20a to 20d. However, the shape of the lubricating oil supply holes 18a to 18d is not limited to this, and may be a simple hole provided in the lubricating oil supply passage 17, for example. Further, the hole diameter with respect to the lubricating oil supply hole increases in the order of the lubricating oil supply holes 18a, 18b, 18c, and 18d. The size of each lubricating oil supply hole may be determined experimentally so that the amount of lubricating oil supplied to each rocker arm and cam nose is substantially equal.

  In this embodiment, only one lubricating oil supply passage 17 is provided for all four cylinders. That is, the lubricating oil supply passage 17 has a plurality of lubricating oil supply holes 18 for dropping on the rocker arm 21 and the cam nose 20 in each cylinder. However, the lubricating oil supply passage 17 may be provided independently for each cylinder. In this case, four lubricating oil supply passages 17 are provided for four cylinders, and at the tip of each lubricating oil supply passage 17, the lubricating oil supply holes 18 are formed between the rocker arm 21 and the cam nose 20 of each cylinder. It becomes the structure provided so that it may become upper. Furthermore, the lubricating oil supply passage 17 may be provided for each rocker arm 21 and cam nose 20.

  Further, the lubricating oil supply passage 17 is one at the portion connected to the volume portion 16, which branches in the middle, and finally the number of cylinders or the number of rocker arms 21 and cam noses 20. The number of branches may be the same.

  In the above embodiment, the engine oil discharged from the OCV 11 has been described on the assumption that it is supplied to the rocker arm 21 and the cam nose 20 for opening and closing the intake valve of each cylinder. However, the engine oil discharged from the OCV 11 is described. May be supplied to the rocker arm 21 and the cam nose 20 for opening and closing the exhaust valve of each cylinder, or may be supplied to both of them.

  In the above embodiment, the engine oil is assumed to be dropped from the lubricating oil supply hole 18 to both the rocker arm 21 and the cam nose 20, but it is not always necessary to drop the oil to both the rocker arm 21 and the cam nose 20. Alternatively, it may be dropped on one side.

  Further, the valve timing changing device to which the present invention is applied is not limited to that in the above embodiment. The present invention can be widely applied to a configuration in which the valve timing changing device is controlled by the OCV and the engine oil is discharged from the OCV.

It is the schematic which shows the structure of the lubricating device of the internal combustion engine which concerns on the Example of this invention. It is a figure for demonstrating the effect | action of OCV and the valve timing change apparatus which concerns on the Example of this invention. It is sectional drawing which shows the more detailed structure of the lubricating device of the internal combustion engine which concerns on the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Oil pan 2 ... Oil strainer 3 ... Oil supply pump 5 ... Oil filter 6 ... Main gallery 7 ... Crank journal oil supply hole 8 ... Cylinder head oil supply hole 9 ..Cam journal oil supply hole 10 ... Oil control valve oil supply hole 11 ... OCV (oil control valve)
12 ... Valve timing advance oil passage 13 ... Valve timing retard oil passage 14 ... Valve timing changing device 14a ... Advance chamber 14b ... Delay chamber 15 ... Lubricating oil Discharge path 16 ... Volume 17 ... Lubricating oil supply passage 18, 18a, 18b, 18c, 18d ... Lubricating oil supply hole 19 ... Camshaft 20, 20a, 20b, 20c, 20d ... Cam noses 21, 21a, 21b, 21c, 21d ... Rocker arms 25a, 25b, 25c, 25d ... Valve stem 41 ... Casing 42 ... First supply / discharge port 43 ... Second supply / discharge Port 44 ... First discharge port 45 ... Second discharge port 46 ... Supply port 47 ... Coil spring 48 ... Spool 49 ... Valve portion 50 ... Electromagnetic solenoid

Claims (4)

A valve timing changing device that changes the opening and closing timing of the intake and exhaust valves of the internal combustion engine by supplying or discharging lubricating oil;
The valve timing changing device is controlled by supplying lubricating oil to the valve timing changing device, collecting the lubricating oil discharged from the valve timing changing device, or shutting off the supplied or discharged lubricating oil. And a control valve for discharging the lubricating oil used for controlling the valve timing changing device,
A lubricating oil supply passage for supplying the lubricating oil discharged from the control valve to a rocker arm and / or a cam in a valve mechanism of the internal combustion engine, and between the control valve and the lubricating oil supply passage, A lubricating device for an internal combustion engine, comprising a volume portion for storing lubricating oil discharged from the control valve. 2. The internal combustion engine lubrication device according to claim 1, wherein the lubricating oil supply passage is provided so as to be inclined so that the height decreases as the distance from the control valve increases. 3. The internal combustion engine lubrication device according to claim 1 or 2, wherein the lubricating oil supply passage is provided independently for each cylinder of the internal combustion engine. The lubricating oil supply passage is provided with a lubricating oil supply hole for dropping the lubricating oil to the rocker arm and / or the cam in each cylinder of the internal combustion engine,
The lubricating device for an internal combustion engine according to any one of claims 1 to 3, wherein the lubricating oil supply hole disposed farther from the control valve has a larger hole diameter.

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