JPH03286113A - Oil passage for internal combustion engine - Google Patents

Abstract

PURPOSE:To supply required and satisfactory rates of oil respectively to intake and exhaust valve systems by providing a flow rate adjusting means on each of intake and exhaust side oil passages while differentiating the flow rates of oil in the passages from each other. CONSTITUTION:Oil is supplied from oil passages 18, 10 on the downstream side of an oil filter to an intake cam shaft 30 and an exhaust cam shaft 32, respectively through an oil passage 24A, and an intake side oil supplying passage 26, and through an oil passage 24B, and an exhaust side oil supplying passage 28. Oil jet parts 34, 36 serving as flow rate adjusting means are respectively provided on oil passages 24A-2, 24B-2 of a cylinder head 6. Inner diameters of the oil jet parts 34, 36 are differentiated from each other, so that required and satisfactory rates of oil can be supplied to the intake and exhaust valve systems in case an internal combustion engine 2 is slantly mounted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an oil passage of an internal combustion engine, and in particular, the oil passage disposed downstream of an oil filter provided in a cylinder block of an internal combustion engine allows the oil passage to pass through the upper part of the cylinder head. This invention relates to the oil passage of an internal combustion engine that supplies oil to the intake and exhaust valve train parts of the engine.

(Prior Art) In an internal combustion engine, oil is supplied to each part of the engine in order to reduce sliding friction.In the conventional internal combustion engine, oil passages include first and second oil passages arranged in the cylinder head cover.
In order to supply oil to the camshaft part, there are two oil passages that pass through the cylinder block and cylinder head from the oil passage of the cylinder block, and one oil passage that passes from the oil passage of the cylinder block. Oil is supplied to the oil passage of the cylinder head by the oil passage, and from this oil passage of the cylinder head, the oil is supplied to the first and second oil passages.
There is one in which the oil passage of the cylinder head is divided into two in order to supply oil to each part of the camshaft.

Furthermore, as a lubricating device for the hydraulic lash adjuster,
As disclosed in Japanese Utility Model Application No. 62-171606, a hydraulic lash adjuster is arranged in a cylinder head and receives hydraulic pressure to reduce hull plush of intake and exhaust valves;
a first oil passage that guides oil fed from the oil passage of the cylinder block above the hydraulic lash adjuster; an expansion chamber provided at the upper end of the first oil passage and closed by a blind plug; and an expansion chamber. Some oil passages are provided at an angle downward from the engine and include a second oil passage that supplies oil to the hydraulic lash adjusters on the intake and exhaust sides.

[Problem that the invention seeks to solve]

By the way, in the oil passage of a conventional internal combustion engine, as shown in FIG.
The method of mounting the vehicle at an angle is often used.

In addition, the first and second
All oil passages that supply oil to the camshaft portion (not shown) are formed to have the same passage diameter, and the first
, the same pressure and the same amount of oil were supplied to the second camshaft (not shown).

As a result, in the internal combustion engine, as shown in FIG. 4, the intake valve train 130 part is arranged above the exhaust valve train 132 part, and The amount of oil supplied to the 130 parts of the intake valve train system is reduced compared to the amount of oil supplied, and there is a risk that the 130 parts of the intake valve train system will run out of oil. 13
In addition, the intake oil passage (not shown) that supplies oil to the intake valve train 130 part was not able to reliably lubricate the intake valve train 130 part.
Because it is located above the exhaust oil passage (not shown) that supplies oil to 130 parts of the intake valve system, air flows into the oil passage (not shown) that supplies oil to 130 parts of the intake valve train system. There was an inconvenience in that it easily accumulated and it took time for the lasso adjuster to recover.

In order to avoid the above-mentioned disadvantages, it may be possible to increase the size of the oil pump, but this requires a large space when arranging the oil pump, which is disadvantageous in practical terms.

[Purpose of the invention]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned inconvenience, an object of the present invention is to provide a flow rate adjusting means in the oil passage to vary the amount of oil supplied to the valve train parts for intake and exhaust. To provide an oil passage for an internal combustion engine that can supply a necessary and sufficient amount of oil to the intake and exhaust valve train parts of an internal combustion engine, and can reliably lubricate the intake and exhaust valve train parts.

[Means for solving problems]

In order to achieve this object, the present invention supplies oil to the valve train parts for intake and exhaust in the upper part of the cylinder head through an oil passage arranged downstream of an oil filter provided in the cylinder block of an internal combustion engine. The present invention is characterized in that a flow rate adjusting means is provided in the oil passage of the internal combustion engine so as to vary the amount of oil supplied to intake and exhaust valve train parts.

[Effect]

With the above configuration, when the internal combustion engine is driven, the oil in the oil passage is supplied to either the intake or exhaust valve train parts, and the oil is supplied to either the intake or exhaust valve train parts. It is supplied to the other part of the system.

At this time, a flow rate adjustment means is provided in the oil passage to vary the amount of oil supplied to the valve train parts for intake and exhaust, and a necessary and sufficient amount of oil is supplied to the valve train parts for intake and exhaust. ing.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings.

1 to 3 show a first embodiment of the invention.

In FIG. 2, 2 is an internal combustion engine, 4 is a cylinder block, and 6 is a cylinder head. The cylinder head 4 of the internal combustion engine 2 has a cylinder mounted thereon above, and a cylinder head cover 8 attached to the throat 6 of the cylinder. This cylinder block 4 has an oil pan 10 mounted below, and a crankshaft support member 14 that rotatably supports the crankshaft 12 is fixedly provided by a port 16-1.16-:l.

The cylinder block 4 also includes a first small oil passage 1.
8 is provided. This first oil passage 18 is connected to the second oil passage 18.
In the figure, it is connected to one end portion of a second oil passage 20 extending laterally in the cylinder block 4 . The other end portion of the second oil passage 20 is closed by a plug portion 22 .

Further, the second oil passage B20 is provided with third A and third B oil passages 24A and 24B. That is, the 3A and 3B oil passages 24A and 24B open at their starting ends in the second oil passage 20, and pass upward through the cylinder block 4 and the cylinder head 6 in FIG. The end is opened at the upper end surface. These 3A and 3B oil passages B24A and 24B are the 3A and 3B oil passages 24A1.24 on the cylinder block side.
B-1 and cylinder head side 3rd A, 3rd B oil passage 2
4A-2, 24B-2, and an intake/exhaust side oil supply passage 26 provided in the rad cover 8 to the cylinder.
．． I am contacting 28. The intake side oil supply passage 26
is the intake valve train part, for example, the first intake valve) 30
I am contacting the department. The exhaust side oil supply passage 28 communicates with an exhaust valve operating part, for example, a second exhaust camshaft 32 part.

Furthermore, in order to vary the amount of oil supplied to the valve operating parts for intake and exhaust, the oil passage, for example, the third
The third B oil passages 24A and 24B are provided with flow rate adjusting means, for example, first and second oil jet portions 34 and 36, respectively.

That is, the first oil jet 74 part 34 is installed at the lower end portion of the third A oil passage 24A-2 on the cylinder head side forming the third A oil passage 24A, which is the connecting portion with the sixth oil passage 24A-1 on the cylinder block side. establish. In addition, a first oil jet portion 36 is provided at the lower end portion of the third B oil passage 24B-2 on the cylinder head side forming the third B oil passage 24B, at a connecting portion with the third B oil passage 24B-1 on the cylinder block side.

At this time, when the internal combustion engine 2 is mounted inclined in an engine room (not shown), oil is supplied to the first intake camshaft 30 in order to avoid a decrease in the amount of oil supplied to the first intake camshaft 30. The inner diameter d1 of the first oil jet section 34 that supplies oil is set larger than the inner diameter d2 of the second oil jet section 36 that supplies oil to the second exhaust camshaft 32.

Note that 38 is a gasket, and 40 is a hole in the gasket.

Next, the effect will be explained.

When the internal combustion engine 2 is driven, oil is supplied from the first oil passage 18 to the second oil passage 20, is supplied to the first camshaft 30 portion for intake by the third A oil passage 24A, and is also supplied to the first camshaft 30 for exhaust. 3B oil passage 24 of
B to the second camshaft 32 portion.

At this time, the first and second camshafts 30 for intake and exhaust.
In order to make the amount of oil supplied to the 32 parts different, first and second oil passages are provided in the 3A and 3B oil passages 24A and 24B.
By providing the oil jet portions 34 and 36, the second exhaust camshaft 32 is connected to the first intake camshaft 30.
The amount of oil is adjusted so that a larger amount of oil is supplied, and necessary and sufficient oil is supplied to the first intake camshaft 30 and the second exhaust camshaft 32.

As a result, the first camshaft 3 for intake of the internal combustion engine 2
The first and second camshafts 30 and 32 can be reliably lubricated by supplying a necessary and sufficient amount of oil to each of the second camshaft 32 and the second camshaft 32 for exhaust. 30. The durability of the 32 parts can be improved, which is economically advantageous.

In addition, by supplying a necessary and sufficient amount of oil to the first and second camshafts 34.36 by the first and second oil jets 34.36, when the internal combustion engine 2 is started, the 3A and 3B The air accumulated in the oil passages 24A and 24B can be quickly released, and the first and second camshafts 34
．． It is possible to efficiently lubricate 36 parts, which is advantageous in practice.

FIG. 4 shows a second embodiment of the invention.

In this second embodiment, parts that perform the same functions as those in the first embodiment described above are given the same reference numerals and will be explained.

The feature of this second embodiment is that in the first embodiment, the 3A and 3B
The inner diameter d1 of the first and second oil jet portions 34 and 36, which are flow rate adjustment means provided in the oil passages 24A and 24B.
, d2 are made different, but the diameter of the oil passage communicating with the first and second camshafts 30 and 32 as a flow rate adjusting means is made different.

That is, the cylinder block 4 is provided with a second oil passage 20 that communicates with the first oil passage 18, and a single third oil passage whose starting end opens in the second oil passage 20 and whose terminal end opens into a fourth oil passage 42, which will be described later. A passage 24 is provided. This third
The oil passage is the third oil passage 24- on the cylinder block side.
1 and a third oil passage 24-2 on the cylinder head side.

Further, the cylinder head 6 is provided with a fourth oil passage 42 extending in the lateral direction of the cylinder head 6 in FIG. This fourth oil passage 42 is connected to an intake/exhaust oil supply passage 26.2 provided in the cylinder head cover 8.
No. 5A and No. 5B oil passages 44A, 4 which supply the amount of oil to the first and second camshafts 30 and 32 through 8.
Provide 4B.

At this time, in order to supply a necessary and sufficient amount of oil to the 30°32 portions of the first and second camshafts, the passage diameter dA of the 5A oil passage 44A is changed to the 5B oil passage 4.4B.
The diameter of the passage is larger than dB, that is, dA>dB.

Thereby, a necessary and sufficient amount of oil can be reliably supplied to the first and second camshafts 30 and 32.

Note that this invention is not limited to the first and second embodiments described above, and can be modified in various ways.

For example, in the first embodiment of this invention, the first and second
By changing the inner diameter of the oil jet, the amount of oil supplied to the first and second camshaft parts was made different,
It is also possible to use the flow rate adjusting means by changing the hole portion of a gasket interposed between members in which an oil passage is formed, for example, between a cylinder block and a cylinder head.

〔Effect of the invention〕

As explained in detail above, according to this invention, a flow rate adjustment means is provided in the oil passage in order to vary the amount of oil supplied to the intake and exhaust valve train parts of the internal combustion engine. The suction and exhaust valve train parts can be reliably lubricated by supplying the necessary and sufficient amount of oil to each valve train part, improving the durability of the suction and exhaust valve train parts, making it economical. It is advantageous for

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, FIG. 1 is an enlarged sectional view of the main part of an oil passage of an internal combustion engine, FIG. 2 is a schematic sectional view of the internal combustion engine, and FIG. 3 is a schematic sectional view of the internal combustion engine. FIG. 3 is an enlarged sectional view of a cylinder head portion. FIG. 4 shows a second embodiment of the invention. ! It is a schematic sectional view of engine A. FIG. 5 is a schematic explanatory diagram of an internal combustion engine showing the prior art of Hoko's invention. In the figure, 2 is an internal combustion engine, 4 is a cylinder block, and 6 is an internal combustion engine.
is a cylinder head, 8 is a cylinder feeder, 10 is an oil pan, 12 is a crankshaft, 14 is a crankshaft support member, 16 is a bolt, 18 is a first oil passage, 20 is a second oil passage, 22 is a plug part, 24 is a third oil passage, 26 is an intake side oil supply passage, 28 is an exhaust side oil supply passage, 30 is a first shaft for intake, 32 is a second camshaft for exhaust, 34 is a first oil jet section,
36 is a second oil jet part, 38 is a gasket, 40
is the hole in the gasket. Utility model registration applicant Osamu Suzuki Motor Co., Ltd.

Claims (1)

[Claims] 1. In the oil passage of an internal combustion engine, oil is supplied to the valve train parts for intake and exhaust at the upper part of the cylinder head by the oil passage arranged downstream of the oil filter provided in the cylinder block of the internal combustion engine. An oil passage for an internal combustion engine, characterized in that each of the oil passages is provided with a flow rate adjusting means for varying the amount of oil supplied to the exhaust valve train parts.