WO2017082402A1

WO2017082402A1 - Oil pan device

Info

Publication number: WO2017082402A1
Application number: PCT/JP2016/083560
Authority: WO
Inventors: 貴哉前田; 直樹水上; 松永　務; 功橘川
Original assignee: いすゞ自動車株式会社
Priority date: 2015-11-12
Filing date: 2016-11-11
Publication date: 2017-05-18
Also published as: JP6661984B2; US20180355772A1; JP2017089533A; CN108350774A; EP3375992B1; CN108350774B; EP3375992A4; EP3375992A1

Abstract

An oil pan device 1 is provided with an oil pan 10 attached to a lower end 5a of a crankcase 5 of an engine, and a drain bolt 50. The oil pan 10 has a recessed part 33 formed by recessing a bottom surface part 32 upward, an inclined part 35 that sections off the recessed part 33, and a bolt hole 36 provided to the inclined part 35. When the drain bolt 50 is attached to the bolt hole 36, a head part 52 of the drain bolt 50 is accommodated in the recessed part 33.

Description

Oil pan equipment

The present disclosure relates to an oil pan device, and more particularly to an oil pan device used for a vehicle engine.

In the vehicle engine, an oil pan for storing engine oil is attached to the lower end of the crankcase. Generally, a bolt hole for discharging engine oil is provided at the bottom of the oil pan, and a drain bolt for closing the bolt hole is detachably attached to the bolt hole.

Japanese Unexamined Patent Publication No. 5-306653

In vehicles, there is a request to lower the mounting position of the engine from the viewpoint of improving steering stability. On the other hand, when the height position of the bottom of the oil pan is lowered, for example, there is a possibility that it falls below a predetermined lower limit height such as the lowest ground height of the vehicle. .

When a thin oil pan is used, if the drain bolt head protrudes below the bottom end position of the bottom surface of the oil pan, it is disadvantageous for securing a predetermined lower limit height. Therefore, a method is conceivable in which the bottom of the oil pan is recessed upward to form a recess, and the drain bolt is attached upright in the recess.

However, with such a method, a relatively large amount of engine oil remains in the oil pan around the bolt hole when the engine oil is discharged.

This disclosure has been made in view of the above circumstances, and provides an oil pan apparatus that can reduce the amount of residual oil in an oil pan when engine oil is discharged.

An oil pan device according to the present disclosure includes an oil pan attached to a lower end of an engine crankcase, and a drain bolt. The oil pan includes a recess formed by recessing a bottom surface portion upward, and the recess. It has an inclined part to be defined and a bolt hole provided in the inclined part, and when the drain bolt is attached to the bolt hole, the head of the drain bolt is accommodated in the recess.

In the oil pan apparatus, the top of the recess may be disposed at a position higher than a mounting surface of the oil pan with the crankcase.

Further, in the above oil pan apparatus, the concave portion may be formed in an inverted V shape in a sectional view.

In the oil pan apparatus according to the present disclosure, it is possible to reduce the amount of residual oil in the oil pan when the engine oil is discharged.

FIG. 1 is a schematic diagram illustrating a bottom surface side of an oil pan apparatus according to an embodiment of the present disclosure. 2 is a cross-sectional view taken along the line II-II in FIG. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 4A is a diagram illustrating a residual oil level according to an embodiment of the present disclosure. FIG. 4B is a diagram showing a residual oil level when a drain bolt is installed upright in a recess having no inclined portion.

Hereinafter, an oil pan apparatus according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. In an embodiment described later, the oil pan device is mounted on a vehicle engine (not shown), and the vertical direction is based on the vertical direction of the vehicle.

FIG. 1 shows a bottom surface side of an oil pan apparatus 1 according to an embodiment of the present disclosure. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a sectional view taken along the line III-III in FIG.

2 and 3, the symbol R indicates the road surface. Moreover, in FIG. 3, the dashed-dotted line L shows the lowest end position of the head 52 of the drain bolt 50, and the dashed-two dotted line X shows the lowest ground clearance of a vehicle. In the present embodiment, the engine is disposed so as to be inclined so that the cylinder shaft is slightly inclined with respect to the vertical direction when mounted on the vehicle. Therefore, in FIGS. 2 and 3, the oil surface of the engine oil O and the road surface R are shown to be inclined with respect to the horizontal direction in the drawings.

In these drawings, the front / rear / left / right direction of the oil pan apparatus 1 is irrelevant to the front / rear / left / right direction of the vehicle, and is merely determined for convenience of explanation. In the present embodiment, the forward direction of the oil pan 10 coincides with the forward direction of the vehicle.

1-3, the oil pan apparatus 1 includes an oil pan 10 attached to a lower end 5a of an engine crankcase 5 and a drain bolt 50.

The oil pan 10 is made of a metal material or a heat-resistant resin material, and includes a side wall 20 constituting a side surface and a bottom plate 30 constituting a bottom surface. Inside the oil pan 10, engine oil O for lubricating a lubricated member such as a crankshaft (not shown) is stored. In the present embodiment, the oil pan 10 is a thin (shallow dish) oil pan whose side wall 20 has a short vertical length.

The flange part 21 attached to the lower end 5a of the crankcase 5 via a gasket (not shown) is provided at the upper end part of the side wall 20. The flange portion 21 is detachably attached to the lower end 5a of the crankcase 5 with a bolt 22 or the like.

The bottom plate 30 includes a flat plate portion 31 formed in a flat plate shape and a concave portion 33 in which a bottom surface portion 32 (lower surface portion) is recessed upward. The recess 33 is formed at the front half of the left half of the bottom plate 30.

Particularly in the present embodiment, the recess 33 has a top 33T at a position higher than a mounting surface F (upper surface of the flange portion 21) with the crankcase 5 (lower end 5a) of the oil pan 10. Further, as shown in FIG. 3, the recess 33 is formed in an inverted V shape in a cross-sectional view.

More specifically, the concave portion 33 is formed by denting the bottom surface portion 32 into a partial cylindrical shape. The portion 33 having a columnar shape corresponding to the concave portion includes a first inclined portion 34 formed in the shape of the circumferential surface of the column and a planar second inclined portion 35 formed in the shape of the end surface of the column. In the present embodiment, a bolt hole 36 is provided perpendicular to the second inclined portion 35.

The bolt hole 36 has a through hole 36a penetrating the second inclined portion 35, and a nut portion 36b disposed in the oil pan 10 and provided coaxially with the through hole 36a. A flange 36c is formed at the end of the nut portion 36b on the second inclined portion 35 side, and the flange 36c is fixed to the second inclined portion 35 by welding or the like.

Further, a lateral hole 36d is formed in the bolt hole 36 at the boundary position between the nut portion 36b and the flange 36c. The lateral hole 36d is inclined with respect to the axis of the bolt hole 36, and penetrates substantially horizontally from the lowest end position of the through hole 36a toward the boundary position.

The drain bolt 50 is detachably attached to the bolt hole 36 from the outside of the oil pan 10. Specifically, the drain bolt 50 has a screw part 51 and a head part 52, and the screw part 51 is screwed into the bolt hole 36 and screwed together. An O-ring 53 for sealing a gap with the inner peripheral surface of the through hole 36 a is attached to the root portion of the screw portion 51.

The oil pan apparatus 1 of the present embodiment is configured to accommodate the head 52 in the recess 33 when the drain bolt 50 is attached to the bolt hole 36. And the height position L of the lowermost end of the oil pan apparatus 1 (here, the head 52 of the drain bolt 50) is positioned above a predetermined lower limit height of the vehicle, in this embodiment, the lowest ground height X. ing.

Next, the effect of the oil pan apparatus 1 of this embodiment is demonstrated based on FIG. 3, FIG. 4A and FIG. 4B. FIG. 4A shows the residual oil level when the drain bolt 50 is removed from the bolt hole 36 and the engine oil O is discharged in the oil pan apparatus 1 of the present embodiment shown in FIG. FIG. 4B shows a residual oil level in a configuration in which a drain bolt is installed upright in the recess in the oil pan apparatus 1 ′ of the comparative example having no inclined portion.

In this embodiment, as shown in FIG. 4A, when the drain bolt 50 is removed from the bolt hole 36, the engine oil O is also discharged to the outside from the side hole 36d. Therefore, the lower end position (the height position indicated by the alternate long and short dash line Z1) of the horizontal hole 36d of the bolt hole 36 is the residual oil level.

On the other hand, as shown in FIG. 4B, in the oil pan device 1 ′ of the comparative example, the lower end position of the opening in the oil pan 10 ′ in the horizontal hole 36d ′ of the bolt hole 36 ′ (the height position indicated by the alternate long and short dash line Z2). Becomes the residual oil level. The residual oil level (Z2) of this comparative example is higher than the residual oil level (Z1) of this embodiment.

Therefore, in this embodiment, by providing the bolt hole 36 in the second inclined portion 35, the amount of residual oil can be reduced by an amount corresponding to (Z2-Z1).

Further, in the present embodiment, as shown in FIG. 3, a concave portion 33 in which the bottom surface portion 32 is recessed upward is provided, and the head portion 52 of the drain bolt 50 is accommodated in the concave portion 33. As a result, it is possible to prevent the head 52 from protruding from the bottom surface portion 32 toward the road surface R, which is advantageous for lowering the engine mounting position.

Further, the concave portion 33 of the present embodiment has the top portion 33T disposed at a position higher than the mounting surface F of the oil pan 10 with the crankcase 5. Therefore, even when a thin oil pan is used in order to comply with the minimum ground clearance X that is the lower limit level, a sufficient storage space for the head 52 can be secured.

In the present embodiment, the bolt hole 36 is provided in the second inclined portion 35, so that the drain bolt 50 can be easily attached (removed) using a long spanner or a spectacle wrench that is easier to apply force. I can.

It should be noted that the present disclosure is not limited to the above-described embodiment, and can be appropriately modified and implemented without departing from the spirit of the present disclosure.

For example, in the present embodiment, the concave portion is formed by being recessed into a partial cylindrical shape, but the shape of the concave portion is also conceivable, and may be formed in, for example, a substantially hemispherical shape.

This application is based on a Japanese patent application (Japanese Patent Application No. 2015-222131) filed on November 12, 2015, the contents of which are incorporated herein by reference.

The oil pan apparatus according to the present disclosure can reduce the amount of residual oil in the oil pan when the engine oil is discharged.

DESCRIPTION OF SYMBOLS 1 Oil pan apparatus 5 Engine crankcase 10 Oil pan 32 Bottom face part 33 Recessed part 35 (2nd) Inclined part 36 Bolt hole 50 Drain bolt 52 Head

Claims

An oil pan attached to the lower end of the crankcase of the engine, and a drain bolt,
The oil pan is
A recess formed by recessing the bottom part upward;
An inclined portion defining the recess;
A bolt hole provided in the inclined portion,
An oil pan apparatus in which a head of the drain bolt is accommodated in the recess when the drain bolt is attached to the bolt hole.
The oil pan apparatus according to claim 1, wherein a top portion of the recess is disposed at a position higher than a mounting surface of the oil pan with the crankcase.
The oil pan apparatus according to claim 1, wherein the concave portion is formed in an inverted V shape in a cross-sectional view.
The oil pan apparatus according to claim 2, wherein the concave portion is formed in an inverted V shape in a cross-sectional view.