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Oil pan

a technology of oil pans and resin materials, applied in the field of oil pans, can solve the problems of inability to ensure the strength of resin materials with respect to the stone thrown up from the road surface, and inability to avoid a stone thrown up from a road surface, etc., to achieve the effect of increasing strength, increasing weight, and increasing cos

Inactive Publication Date: 2011-06-09
MAHLE FILTER SYST JAPAN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

For preventing the stone thrown up from the road surface while the vehicle is moving from hitting against the oil pan, there may be provided another cover member, or the engine may be disposed on an upper portion of the vehicle body to keep the oil pan away from the road surface.
Moreover, it is considered that a thickness of the oil pan is merely increased for increasing the strength. However, in this case, the weight may be increased, and the cost may be increased.

Problems solved by technology

The resin material has a strength which is inferior to a strength of the metal material.
Therefore, it is not possible to avoid a stone thrown up from a road surface while the vehicle is moving, from hitting against the oil pan.
Moreover, it is difficult to ensure the sufficient strength by the resin material with respect to the stone thrown up from the road surface.
However, in a case in which another member such as the cover is provided, the cost is increased.
Moreover, in a case in which the engine is disposed on the upper portion of the vehicle body, the center of gravity of the vehicle may become unstable, or it is necessary to largely vary the layout of the engine.
However, in this case, the weight may be increased, and the cost may be increased.

Method used

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Examples

Experimental program
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Effect test

first embodiment

In this first embodiment, the plurality of ribs 9 are formed at the predetermined regular intervals. In particular, the plurality of ribs 9 are formed at the predetermined regular intervals such that a stone (that is, 6-size crushed stone (No. 6-sized crushed stone) having a size of about φ5-φ13 (particle size of 5-13 mm) is caught in (stuck with) a gap between the tip end portions 11 and 11 of the ribs 9 and 9 adjacent to each other (cf. FIG. 7 described later).

The oil pan 1 is mounted on the vehicle so that the bottom wall 6 confronts a road surface. The ribs 9 of the oil pan 1 are formed so that longitudinal directions of the ribs 9 (a direction perpendicular to a plane of a paper of FIGS. 3 and 4) are perpendicular to a traveling direction of the vehicle. That is, in this embodiment, the oil pan 1 is mounted on the vehicle so that the longitudinal direction of the oil pan 1 is parallel with the forward and rearward directions of the vehicle. Accordingly, the ribs 9 of the oil pa...

second embodiment

In this second embodiment, the distance between the ribs 22 and 23 is greater than the distance between the ribs 21 and 22. Moreover, a width of a base end portion 24 of the rib 22 is greater than a width of a base end portion 26 of the rib 21 and a width of a base end portion 28 of the rib 23. A width of a tip end portion 25 of the rib 22 is greater than a width of a tip end portion 27 of the rib 21 and a tip end portion 29 of the rib 23. Furthermore, the width of the base end portion 28 of the rib 23 is smaller than the width of the base end portion 26 of the rib 21 and the base end portion 24 of the rib 22. The width of the tip end portion 29 of the rib 23 is smaller than the width of the tip end portion 27 of the rib 21 and the tip end portion 25 of the rib 22.

In this second embodiment, in the ribs 21, 22 and 23, the width of the connection portion at which the base end portion and the tip end portion are connected (continuous) with each other is equal to or smaller than the wid...

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Abstract

An oil pan made from a resin material, the oil pan includes: a bottom wall; and side walls; the bottom wall including a plurality of ribs protruding from the outer wall surface, each of the ribs having; a base end portion protruding from the outer wall surface of the bottom wall, and having a tip end surface, and a tip end portion protruding from the tip end surface, the tip end portion being connected with the base end portion at a connection portion, the connection portion at which the base end portion and the tip end portion are connected with each other, which has a width that is equal to or smaller than a width of a portion at a base end position of the base end portion, and equal to or smaller than a width of a portion at a tip end position of the tip end portion.

Description

BACKGROUND OF THE INVENTIONThis invention relates to an oil pan which is made from a resin, which is mounted on a lower portion of an engine or a transmission mounted on a vehicle, and which stores a lubricating oil.A conventional oil pan is made from a metal to ensure a strength and a rigidity. Accordingly, the oil pan increases a weight of an engine. Therefore, the oil pan adversely affects an engine output or fuel economy.Japanese Patent Application Publication No. 2008-121643 discloses an oil pan made from a resin, and devised to decrease a weight of an engine.SUMMARY OF THE INVENTIONThe resin material has a strength which is inferior to a strength of the metal material. In particular, the oil pan is disposed in a lowest portion of the engine or a transmission case. Therefore, it is not possible to avoid a stone thrown up from a road surface while the vehicle is moving, from hitting against the oil pan. Moreover, it is difficult to ensure the sufficient strength by the resin mat...

Claims

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Application Information

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IPC IPC(8): B65D1/34
CPCF01M11/0004F01M2011/0091F01M2011/0087F01M2011/002
Inventor NONAKA, ATSUSHI
Owner MAHLE FILTER SYST JAPAN CORP