JPH04104116U - Internal combustion engine lubricating oil passage structure - Google Patents

Abstract

(57) [Summary] [Purpose] To suppress the inclusion of air bubbles in the lubricating oil supplied to the cylinder head. [Structure] The block gallery 8 is branched from a part that avoids the path of bubbles in the lubricating oil flowing through the main gallery 7.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to the lubricating oil passage structure of internal combustion engines. Therefore, it is equipped with an oil pump driven by The present invention relates to a lubricating oil passage structure provided in a lubrication system of a vehicle internal combustion engine for pressure-feeding.

0002

[Conventional technology]

As a conventional lubricating oil passage structure for such an internal combustion engine, for example, Utility Model Application No. 63-12370 A device as shown in FIG. 6 disclosed in Publication No. 9 is known. Here, 1 is Cylinder block, 2 is the oil pan attached to the bottom side of cylinder block 1 , 3 is the crankshaft of the engine, and 4 is driven by the crankshaft 3. An oil pump 5 is held at the bottom of the oil pan 2 and is stored in the oil pan 2. The oil storage installed at the inlet for the lubricating oil (hereinafter referred to as oil) It is na. Oil pump 4 transfers the guided oil to an oil cooler and an oil filter. The cooled and purified pressurized oil is sent to the main gallery 7.

0003 Oil is distributed and supplied from the main gallery 7 to each part of the lubrication system, but A part of it is an oil branch passage that rises as shown in the figure (hereinafter referred to as the block gallery). ) 8 to the cylinder head (not shown), where the valve mechanism and piston ton is supplied to the lubrication system involved. Note that 9 is a pin that reciprocates within the cylinder 10. It's Stone.

0004

[Problem that the idea aims to solve]

However, in the conventional lubricating oil passage structure of internal combustion engines as described above, almost all water The air mixed in the oil flowing through the main gallery 7, which is kept flat, Block gallery 8 tends to be concentrated on the upper surface of main gallery 7. Since the oil is rising from the cylinder head, the oil containing a large amount of air bubbles is directly absorbed into the cylinder head. I am led to the side. As a result, the hydraulic lifter built into the cylinder head There have been problems in that it causes malfunctions and prevents smooth lubrication.

[0005] The purpose of this invention is to focus on such conventional problems and to solve them. This prevents air bubbles from getting mixed into the oil sent from the oil pump to the cylinder head. An object of the present invention is to provide a lubricating oil passage structure for an internal combustion engine that allows for

[0006]

[Means to solve the problem]

To achieve this objective, the present invention is branched out from the main gallery and published in series. Lubricating oil passage of an internal combustion engine with a block gallery that supplies lubricating oil to the engine head The structure avoids the passage of air bubbles in the lubricating oil flowing through the main gallery. It is characterized in that the block gallery is branched from the part. be.

[0007]

[Effect]

According to the present invention, in the main gallery, the block is removed from a part of the main gallery that avoids the passage of air bubbles. I made the lock gallery branch, so I can use the cylinder via the block gallery. Air bubbles in the oil led to the cylinder head are suppressed, and the lubrication system around the cylinder head is Smooth lubrication can be obtained.

[0008]

【Example】

Embodiments of the present invention will be specifically described below with reference to the drawings.

[0009] 1 to 3 show an embodiment of the present invention. In these figures, 11 is the main gear. This is a branch passage connected to the lower surface side of the branch passage 11, and both ends of the branch passage 11 are closed. ing. Then, the block gallery 8 is set up from this branch passage 11. Ru. Note that instead of this configuration, one end of the block gallery 8 is not shown. is formed into a J-shape, and one end thereof is directly connected to the bottom side of the main gallery 7. You may also do so.

0010 In the lubricating oil passage configured in this way, the oil pump is connected to the oil cooler and The main oil is the oil sent to the main gallery 7 via the oil filter 6 and the oil filter 6. It is distributed along the gallery 7 to the lubrication system of each part of the engine. However, at this time The air contained in the main gallery 7 becomes bubbles and moves along the inner top surface of the main gallery 7. However, the oil near the inner lower surface of the main gallery 7 to which the branch passage 11 is connected There are almost no air bubbles mixed into the flow, so there are no air bubbles in the block gallery 8. The oil that does not contain is led. Therefore, a hydraulic lift machine is used in the cylinder head. There is no possibility that the structure will malfunction due to air bubbles in the oil.

[0011] 4 and 5 show other embodiments of the present invention. In this example, the main gallery 7 Use one that has a two-degree crank-shaped bend in a nearly horizontal plane. stop A block is placed on the outer surface of the gallery 7 along the vicinity of the first bending portion 7A on the upstream side of the feed. Connect Gallery 8. Although not shown, from such an external surface, for example, A branch passage is provided at almost right angles along the horizontal direction, and a block gallery is installed through this branch passage. It is also possible to start up the relay 8. In any case, below block gallery 8 The ends are occluded.

0012 In the lubricating oil passage configured in this way, the lubricating oil is fed along the main gallery 7. The air bubbles in the incoming oil mainly move along the upper surface of the passage, but in addition, air bubbles such as 7A At the bend, the centrifugal force acting on the fluid causes gas bubbles to move inside the bend 7A. Moreover, oil, which is a fluid, tends to flow along the outside of the bend 7A. Therefore, the block gallery 8, which is directly connected to the outer surface near the bent portion 7A, has no airflow. Oil without bubbles is introduced. In addition, in this example as well, the direct connection part is Needless to say, it is preferable to provide it as low as possible on the outer surface.

[0013]

[Effect of the idea]

As explained above, according to the present invention, the lubricant flowing through the main gallery The block gallery is branched from a part that avoids the passage of air bubbles in the oil. , the lubricating oil with a large amount of bubbles mixed in with it is not guided to the cylinder head as in the conventional method. Air bubbles may cause the hydraulic lift mechanism to malfunction or damage important parts. This has the effect of preventing the lubrication function from being impaired.

[Brief explanation of drawings]

FIG. 1 is a transparent perspective view showing the configuration of an embodiment of the present invention.

FIG. 2 is a side sectional view of FIG. 1;

FIG. 3 is a sectional view taken along line AA in FIG. 1;

FIG. 4 is a transparent perspective view showing the configuration of another embodiment of the present invention.

FIG. 5 is a cross-sectional view of FIG. 4;

FIG. 6 is a perspective view showing the configuration of a conventional example together with its internal combustion engine.

[Explanation of symbols]

1 cylinder block 4 Oil pump 7 Main gallery 7A Bend part 8 Block Gallery 11 Branch passage

Claims (1)

[Scope of utility model registration request] 1. In a lubricating oil passage structure for an internal combustion engine comprising a block gallery branching from a main gallery and supplying lubricating oil to a cylinder head, a portion that avoids a passage path for air bubbles in the lubricating oil flowing through the main gallery. A lubricating oil passage structure for an internal combustion engine, characterized in that the block gallery is branched from the block gallery.