JP5300067B2 - Structure of oil pan in internal combustion engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate die-cast or casting of an oil pan, when an oil filter mounting part with respect to an oil filter is integrally disposed to the oil pan and a boss part for mounting a component for the inside of the oil pan such as a baffle plate is integrally disposed to a portion in the oil pan out of the oil filter mounting part. <P>SOLUTION: In the structure of an oil pan, a bent pipe 15 forming a lubricating oil supply passage 11 from a lubricating oil pump is integrally disposed to the oil filter mounting part 6 to integrally form the boss part to the bent pipe, and the lubricating oil supply port 9 from the lubricating oil supply passage 11 to the oil filter 7 is formed to be a long groove hole. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an oil pan attached to the lower surface of a cylinder block in an internal combustion engine.

In modern internal combustion engine, as described in Patent Documents 1 and 2 as prior art, an oil filter mounting portion for mounting the oil filter you filtered lubricant detachably, the oil filter mounting portion A part of is provided integrally so as to protrude into the oil pan.

Further, in Patent Documents 3 and 4 as other prior arts, for example, a baffle plate for preventing the lubricant from shaking, or an oil suction pipe to the lubricant pump is provided inside the oil pan. and when mounting the oil component pan, it is provided integrally with a boss piece protruding inwardly at predetermined positions on the inner surface of the oil pan, and Turkey attach the front Symbol component in the oil pan to the boss piece Is described.

Japanese Patent Laid-Open No. 10-220214 JP-A-11-241612 JP 2006-316627 A JP 2007-285271 A

  By the way, depending on the internal combustion engine, a boss portion for attaching an oil pan internal part may be integrally provided at a portion protruding into the oil pan in an oil filter attaching portion integrally provided on the oil pan.

However, if the if the oil pan is manufactured by die casting or cast by light alloy or the like, Ru provided Bo scan portion integrally with the portion protruding into the oil pan of the OIL filter mounting portion, the boss or the portion of the parts just flow defects occur in metallic melt, and casting nest and casting due to poor flow of the molten metal dent occurs and a large risk of lead to reduction in the strength of the boss portion There is a problem.

The present invention, this problem, but such work to smooth introduction of the lubricant into OIL filter and technical problem to be erased et solutions.

In order to achieve this technical problem, the invention of claim 1
“An oil filter mounting part for detachably attaching an oil filter for filtering lubricating oil from the outside of the oil pan to an oil pan attached to the lower surface of the cylinder block , so that part of the oil filter protrudes into the oil pan. In the internal combustion engine having a configuration in which a boss part for attaching an oil pan internal part is integrally provided in a portion protruding into the oil pan of the oil filter attaching part.
The oil filter is arranged so that a lubricating oil inlet and outlet are opened upward, and the oil filter mounting portion is located above the lubricating oil inlet and outlet in the oil filter. A portion protruding into the oil pan, and a portion of the oil filter mounting portion protruding into the oil pan includes a lubricating oil supply passage from the lubricating oil pump and a continuous portion thereof. A bent pipe provided with a lubricating oil supply port that opens downward is formed in a state having a curved surface that is convexly convex toward the inside of the oil pan, and the boss portion is formed on the curved surface portion of the bent pipe . while being upwardly provided, before KiJun Namerayu supply port that is configured in the slot has a length "
It is characterized by that.
According to a second aspect of the present invention, in the first aspect, the lubricating oil supply port has an arc shape extending in a circumferential direction of the oil filter and a downward bent shape.

As described above, when the boss part for attaching the oil pan internal parts is provided in the bent pipe integrally provided in the part of the oil filter attaching part protruding into the oil pan, the entire oil pan is made of a light alloy or the like. It is prepared by die casting or casting by the flow of molten metal into the boss portion, because facilitated by the presence of the curved tube, defect generation child flow of the boss portion metals molten and Ya cast Zosu and casting recess is significantly reduced the occurrence, can the boss reliably be configured to have a predetermined strength.

In addition, the lubricating oil supply passage into the oil filter is formed inside the bent pipe, and the lubricating oil supply passage has a shape bent in the direction of the oil filter. by lubricating oil supply port from the supply passage to the oil in the filter is configured in the elongated groove hole, I this both phase俟, lubricating oil can be smoothly introduced in a state of low have flow resistance in the oil filter Therefore, the lubricating oil can be evenly distributed over a wide area of the filter element.

It is a top view which shows the principal part of an oil pan. FIG. 2 is a side view taken along the line II-II in FIG. 1. FIG. 3 is an enlarged sectional view taken along line III-III in FIG. 1. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a sectional view taken along line VV in FIG. 3.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In these drawings, reference numeral 1 denotes a die-cast or cast oil pan made of a light alloy or the like. The oil pan 1 is fastened to a lower surface of a cylinder block 2 in an internal combustion engine by a plurality of bolts 3. Yes.

Wherein the portion of the end surface 5 in the direction of the crank axis 4 of the oil pan 1, an oil filter mounting portion 6 is provided integrally so as you open downwards.

The oil filter mounting portion 6 is configured such that a part of the oil filter mounting portion 6 protrudes into the oil pan 1, and a cylindrical body portion 8 is integrally provided on the lower surface side of the oil filter mounting portion 6. to, for example, Japanese Utility Model 62-140914 discloses such traditional known cartridge-type oil filter 7 described in are screwed from below into the internal thread portion 8a provided on the inner peripheral surface of the cylindrical body portion 8 by being configured to detachably attached. Therefore, the inflow port and the outflow port of the lubricating oil in the oil filter 7 are opened upward. A part of the oil filter mounting portion 6 protrudes into the oil pan 2 above the oil filter 7.

Inside of the cylindrical body portion 8, the oil filter 7 when mounted, and a lubricating oil supply port 9 and the lubrication oil discharge port 10 communicating with the interior of the oil filter 7 is opened downward to Yes.

In this case, of the lubricating oil supply port 9 and the lubricating oil discharge port 10, the latter lubricating oil discharge port 10 is located at the center of the cylindrical body portion 8. located outside the oil discharge port 10, moreover, the lubricating oil supply port 9, as shown in FIG. 4, is configured in length have elongated groove hole to extend in an arc shape along the circumferential direction .

  The oil pan 1 has a supply side pipe 12 having a lubricating oil supply passage 11 communicating with the lubricating oil supply port 9 inside, and a lubricating oil discharge passage 13 communicating with the lubricating oil discharge port 10 inside. The discharge side pipe line 14 provided is provided integrally.

The supply-side pipe 12, sea urchin by that lubricating oil supply passage 11 of the interior having a opening 11a on one end surface 5 in the oil pan 1, extends to one end face 5 in the oil pan 1, wherein the lubricating oil supply passage 1 1 open mouth 11a, lubricating oil discharged from the lubricating oil pump (not shown) Ru is supplied.

Further, a portion of the supply side pipe 12 on the oil filter mounting portion 6 side is formed as a bent pipe 15 bent downward from the lateral direction as shown in FIG. Thus, the lubricating oil supply passage 11 in the supply side pipe line 12 is connected to the long groove type lubricating oil supply port 9.

  On the other hand, the discharge side conduit 14 extends to the upper surface 1a of the oil pan 1 so that the lubricating oil discharge passage 13 therein has an opening 13a on the upper surface 1a of the oil pan 1. The opening 13 a of the lubricating oil discharge passage 13 in the side pipe 14 is configured to communicate with the main oil gallery 16 on the cylinder block 2 side when the oil pan 1 is attached to the cylinder block 2. Yes.

The bent pipe 16 of the oil filter mounting portion 6 has a convex curved surface toward the inside of the oil pan 3, and a boss portion 17 protruding upward is integrally provided on the bent pipe 16 . A baffle plate 18 disposed in the oil pan 1 is attached to the boss portion 17.

In this arrangement, lubricating oil lubricating oil discharged from the pump is filtered enters the oil filter 7 from the lubricating oil supply passage 11 through the lubricating oil supply port 9.

Filtered lubricating oil The oil filter 7 is sent to the main oil Garry 16 in the cylinder block 2 from the lubricant oil discharge port 10 through the lubricating oil discharge passage 13, actuated from the main oil gallery 16 of the various parts in an internal combustion engine Supplied to the part.

In this case, the portion which communicates with the lubricating oil supply port 9 to the oil filter 7 of the lubricating oil supply passage 11 has a shape bent in the direction of the oil filter 7 at Kino Shimomukai bent pipe 15 In addition, since the lubricating oil supply port 9 from the lubricating oil supply passage 11 into the oil filter 7 is formed as a long groove hole, both of them combine to feed the lubricating oil into the oil filter 7. In addition, it can be smoothly introduced into a wide area with low flow resistance.

  On the other hand, a boss portion 17 provided integrally with a portion in the oil pan 1 of the oil filter mounting portion 6 has a baffle plate 18 in the oil pan 1 or a suction pipe to the lubricating oil pump. Such an oil pan internal part is attached.

The boss portion 17 is formed integrally with the downward bent pipe 15 in the supply side pipe line 12, so that the entire oil pan 1 is manufactured by die casting or casting using a light alloy or the like. the flow of molten metal into the boss portion 17, because facilitated by the presence of the curved tube 15, defect generation child flow parts in metallic melt of the boss portion 17 and the Ya cast Zosu and casting recess Can be reliably reduced.

DESCRIPTION OF SYMBOLS 1 Oil pan 2 Cylinder block 6 Oil filter attachment part 7 Oil filter 8 Cylinder part 9 Lubricating oil supply port 10 Lubricating oil discharge port 11 Lubricating oil supply path 12 Supply side pipe 13 Lubricant oil discharge path 14 Discharge side path 15 Curved pipe 17 Boss part 18 Baffle plate

Claims (2)

An oil filter mounting part for detachably mounting an oil filter for filtering lubricating oil from the outside of the oil pan to an oil pan mounted on the lower surface of the cylinder block is so that a part thereof protrudes into the oil pan. In the internal combustion engine having a structure in which a boss part for attaching an oil pan internal part is integrally provided at a part protruding into the oil pan of the oil filter attaching part.
The oil filter is arranged so that a lubricating oil inlet and outlet are opened upward, and the oil filter mounting portion is located above the lubricating oil inlet and outlet in the oil filter. A portion protruding into the oil pan, and a portion of the oil filter mounting portion protruding into the oil pan includes a lubricating oil supply passage from the lubricating oil pump and a continuous portion thereof. A bent pipe provided with a lubricating oil supply port that opens downward is formed in a state having a curved surface that is convexly convex toward the inside of the oil pan, and the boss portion is formed on the curved surface portion of the bent pipe . while being upwardly provided, before KiJun Namerayu supply port that is configured in the slot has a length,
The structure of the oil pan in the inner combustion engine. The lubricating oil supply port has an arc shape extending in the circumferential direction of the oil filter and a downward bent shape.
The structure of the oil pan in the internal combustion engine according to claim 1.

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