JP2003041918A - Oil passage for engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil passage for engine, capable of attaining relatively easy application to an engine with or without an oil cooler, and shortening the length of the passage. SOLUTION: A passage (28) with leads to an inlet of an main gallery and a passage (26) which leads to an outlet of an oil filter are located next to each other with a first partition (29) in between. The passage which leads to the inlet of the main gallery and a passage (top recess 31) which leads to an outlet of an oil cooler are located next to each other with a second partition (31B) in between. The passage which leads to the outlet of the oil filter and a passage (bottom recess 32) which leads to an inlet of the oil cooler are located next to each other with a third partition (32B) in between. At least part of the partitions is removed, and a passage (drilled hole 25) which directly leads to the oil filter and the main gallery and passages (drilled holes 36 and 37) which pass through the oil cooler are selectively formed between the oil filter and the main gallery.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine oil passage.

[0002]

2. Description of the Related Art Inside an engine, an oil passage is formed for leading lubricating oil discharged from an oil pump through an oil filter to a main gallery.

On the other hand, when an oil cooler is provided in the engine, it is necessary to provide an oil passage between the outlet of the oil filter and the inlet of the main gallery through the oil cooler.

[0004]

In other words, it is necessary to form two types of oil passages and to use them properly in order to cope with the presence or absence of an oil cooler after making the cylinder block or the oil pan constituting the engine common. was there.

Further, if an oil cooler is provided, the oil passage becomes long and the pressure loss increases. Therefore, it is necessary to change the pump capacity depending on the presence or absence of the oil cooler in some cases.

Therefore, it is difficult to deal with the presence or absence of the oil cooler.

The present invention has been devised in order to solve the above-mentioned problems of the prior art, and its main purpose is to be able to deal with the presence or absence of an oil cooler relatively easily. Moreover, it is to provide an oil passage for an engine configured so that the passage length can be shortened.

[0008]

In order to achieve such an object, in the present invention, a passage (28) communicating with the inlet of the main gallery and a passage (26) communicating with the outlet of the oil filter are provided with a first partition wall ( 29), a passage connected to the inlet of the main gallery and a passage connected to the outlet of the oil cooler (upper depression 31) are arranged adjacent to each other with the second partition wall (31B) interposed therebetween, and the outlet of the oil filter is provided. And a passage (lower recess 32) communicating with the inlet of the oil cooler are arranged adjacent to each other with a third partition wall (32B) therebetween, and are formed by removing at least a part of the first partition wall. A passage (drill hole 35) for directly communicating the oil filter with the main gallery,
A passage (drill holes 36, 37) passing through an oil cooler formed by removing at least a part of the second partition wall and the third partition wall can be selectively formed. It is intended to provide an oil passage for the engine to run.

With this configuration, the structure of the passage can be easily changed only by changing the partition wall to be removed depending on the presence or absence of the oil cooler.

Moreover, since the oil passage can be shortened, the pressure loss of oil can be reduced and the lubricating performance can be improved.

In particular, each axis of the passage connected to the inlet of the main gallery, the passage connected to the outlet of the oil filter, the passage connected to the outlet of the oil cooler, and the passage connected to the inlet of the oil cooler or their extension lines intersect with each other. By arranging the passages in this way, desired passages can be selectively communicated with each other by linearly drilling with a drill or the like, so that the number of working steps can be relatively small.

[0012]

DETAILED DESCRIPTION OF THE INVENTION The configuration of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a 4-cycle V to which the present invention is applied.
It is a crank pulley side elevation view of a type 8 cylinder engine. Hereinafter, this surface will be referred to as the front surface. This engine E has a narrow angle of 9
An upper block 1 having a pair of cylinder banks forming 0 degree, a lower block 2 joined to the lower surface of the upper block 1, an oil pan 3 joined to the lower surface of the lower block 2, and both cylinders of the upper block 1. A cylinder head 4 joined to each upper surface of the bank and a head cover 5 joined to the upper surface of the cylinder head 4 are provided.

The joint surface between the upper block 1 and the lower block 2 has a crankshaft 6 similar to that of a known engine.
Is supported. Further, a compressor 7 of the air conditioner is provided on the right side of the crankshaft 6 in the lower block 2, and the crankshaft 6 in the lower block 2 is provided.
An AC generator 8 is arranged on the left side of the.

As shown in FIG. 2, the oil pan 3 has an upper oil pan 9 connected to the lower surface of the lower block 2 and an opening opened downward at a front half portion 9F of the upper oil pan 9. It consists of two parts, a lower oil pan 11 and a lower oil pan 11 which are joined to the surface 10. These uppers,
Both lower oil pans 9 and 11 are formed by die casting of an aluminum alloy material.

The upper oil pan 9 is a rear half portion 9
R has a relatively shallow bottom, and its bottom wall 9B is inclined downward toward the front half 9F. The front half portion 9F is made wider than the rear half portion 9R, and from the lower block joining surface 12 having substantially the same contour as the lower surface of the lower block 2 to the lower side of the compressor 7 and the AC generator 8 of the air conditioner. It has a shape that projects to the left and right toward. The downward opening surface 10 forming a plane parallel to the central axis of the crankshaft 6 of the front half portion 9F.
In addition, the lower oil pan 11 which is relatively shallow and flat is fastened with a plurality of bolts B.

As shown in FIGS. 3 and 4, an oil filter mounting portion 21 is provided on the front surface of the upper oil pan 9 slightly to the right, and the front half 9F of the upper oil pan 9 is in front. An oil cooler mounting portion 22 is provided at an intermediate portion in the front-rear direction on the right side surface facing toward.

As shown in FIG. 5 as well, the oil filter mounting portion 21 is formed of a cylindrical hole whose axis extends in the crankshaft direction, and has an inner screw 23 formed on the opening side thereof and a bottom surface thereof. An annular protrusion 24 is formed in the center of the oil filter cartridge OF so as to abut the outer peripheral edge of the center hole (not shown) of the oil filter cartridge OF.

Outside the annular projection 24, the inlet passage 25 of the oil filter whose cross-section orthogonal to the axis is fan-shaped.
The inside of the annular projection 24 is formed with an outlet passage 26 of the oil filter, the axis of which extends in the crankshaft direction and the cross-section of which is orthogonal to the axis is D-shaped. The inlet passage 25 of the oil filter communicates with the oil inlet passage 27 (which connects to the outlet of an oil pump (not shown)) that opens downward in the upper oil pan 9 at the bottom thereof (FIG. 6). , 7).
The oil filter cartridge OF is of a known type, which is not shown in the drawing, in which oil flows into the case from the outer peripheral side and filtered oil flows out from the center.

On the upper surface of the upper oil pan 9, that is, the joint surface 12 for the lower block, the inlet passage 2 of the main gallery is formed.
8 is open (see FIG. 4). The inlet passage 28 of the main gallery is formed by casting with its axis set in the vertical direction, in other words, in a direction orthogonal to the outlet passage 26 of the oil filter, and the cross-sectional shape orthogonal to the axis is oval. The opening surface is adapted to be joined to the inlet (not shown) of the main gallery formed on the lower block side. And the entrance passage 2 of this main gallery
The bottom surface of the oil filter 8 and the inner peripheral surface of the outlet passage 26 of the oil filter are separated by a relatively thin first partition wall 29 (see FIGS. 5 and 6).

The oil cooler mounting portion 22 is formed with dents 31 and 32, each of which has a semicircular shape and is partitioned vertically by a partition wall 30 inclined slightly upward. On the opening end face of a perfect circular contour that combines these two depressions 31 and 32,
An O-ring mounting groove 33 is formed. And each depression 3
The bottom walls 31B and 32B of 1.32 form a part of the peripheral wall of the inlet passage 28 of the main gallery and the peripheral wall of the outlet passage 26 of the oil filter, and the bottom wall 31B serves as the second partition wall of the upper recess 31. Gap and main gallery entrance passage 28
And the bottom wall 32B serves as a third partition wall and the lower recess 32
And the outlet passage 26 of the oil filter are separated (see FIG. 6). The axes of the inlet passage 28 of the main gallery and the recess 31 as a passage that connects to the outlet of the oil cooler are orthogonal to each other, and the outlet passage 2 of the oil filter is formed.
6 and the depression 32 as a passage leading to the inlet of the oil cooler
The axes of and are orthogonal to each other.

Although not shown in the drawing, the oil cooler OC engages with a central boss 34 having a D-shaped cross section formed in the central portion of the partition wall 30 and is divided into upper and lower recesses 3 partitioned by the partition wall 30.
The flow paths corresponding to 1 and 32 are formed, and after cooling the oil that has flowed in from the inlet connected to the lower recess 32, it is made to flow out from the outlet that connects to the upper recess 31.

Now, in the oil passage having the above structure,
For the specification without the oil cooler OC, a drill hole 35 is formed in the first partition wall 29 between the bottom surface of the inlet passage 28 of the main gallery and the peripheral surface of the outlet passage 26 of the oil filter (see FIG. 8). ), The inlet passage 28 of the main gallery and the outlet passage 26 of the oil filter are directly connected.

As a result, the inlet passage 2 of the oil filter
The oil that has flowed into 5 is the oil filter cartridge O
It flows in from the outer peripheral side of F, flows from the center portion through the outlet passage 26 of the oil filter into the inlet passage 28 of the main gallery, and thus flows into the main gallery (not shown) provided in the lower block 2. That is, in this case, the oil flows into the main gallery without passing through the oil cooler.

For the specification with an oil cooler, the hole 35 is not formed in the bottom surface of the inlet passage 28 of the main gallery, and the third partition wall between the lower recess 32 and the outlet passage 26 of the oil filter is provided. 32B and the second partition wall 31B between the upper recess 31 and the main gallery inlet passage 28 are provided with drill holes 36 and 37, respectively (see FIG. 9), whereby the oil filter outlet passage 26 is provided at the lower side. Depression 32,
That is, the inlet of the oil cooler is communicated with, and the outlet of the oil cooler, that is, the upper depression 31 is communicated with the inlet passage 28 of the main gallery.

As a result, the oil discharged from the pump flows from the oil filter cartridge OF into the main gallery via the oil cooler OC.

[0027]

As described above in detail, according to the present invention, the passages connected to the oil filter, the oil cooler and the main gallery are adjacent to each other, so that only a part of the partition wall is removed as desired. The passages adjacent to each other can be communicated with each other, and the configuration of the passages can be changed only by changing the partition wall to be removed depending on the presence or absence of the oil cooler. Further, since the passages can be communicated with each other by linearly drilling with a drill or the like, the number of work steps can be relatively small. Moreover, since the oil passage can be shortened, the pressure loss of oil can be reduced and the lubrication performance can be improved.

That is, according to the present invention, the presence or absence of the oil cooler can be relatively easily coped with, and a great effect can be exerted in shortening the passage length.

[Brief description of drawings]

FIG. 1 is a schematic elevation view of a crankshaft side of a V-type engine to which the present invention is applied.

[Fig. 2] Right side view of the oil pan

FIG. 3 is a front view of a main part of an upper oil pan.

FIG. 4 is a top view of a main part of an upper oil pan.

5 is a cross-sectional view of the main part taken along the line VV in FIG.

6 is a cross-sectional view of the main part taken along the line VI-VI in FIG.

FIG. 7 is a cross-sectional view of main parts taken along the line VII-VII in FIG.

FIG. 8 is a cross-sectional view of an essential part similar to FIG. 6, showing a passage configuration without an oil cooler.

FIG. 9 is a cross-sectional view of an essential part similar to FIG. 6 showing a passage configuration of an oil cooler type.

[Explanation of symbols]

26 Oil filter outlet passage 28 Main Gallery Entrance Passage 29 First partition 31 Upper depression (outlet passage of oil cooler) 31B Bottom wall (second partition) 32 Lower depression (inlet passage of oil cooler) 32B Bottom wall (third partition) 35, 36, 37 drill holes

Claims (2)

[Claims] 1. A passage communicating with an inlet of a main gallery and a passage communicating with an outlet of an oil filter are arranged adjacent to each other with a first partition wall therebetween, and a passage communicating with an inlet of the main gallery and a passage communicating with an outlet of an oil cooler. Are disposed adjacent to each other with a second partition wall interposed therebetween, and a passage that communicates with the outlet of the oil filter and a passage that communicates with the inlet of the oil cooler are disposed adjacent to each other with a third partition wall therebetween, and at least one of the first partition walls. A passage that directly communicates the oil filter and the main gallery formed by removing the portion, and a passage that passes through the oil cooler formed by removing at least a part of the second partition wall and the third partition wall. An oil passage for an engine, characterized in that the oil passage can be selectively formed. 2. An axis or an extension thereof of a passage connected to the inlet of the main gallery, a passage connected to the outlet of the oil filter, a passage connected to the outlet of the oil cooler, and a passage connected to the inlet of the oil cooler. The oil passage of the engine according to claim 1, wherein the respective passages are arranged so as to intersect with each other.