WO2022202438A1

WO2022202438A1 - Oil storage structure and baffle plate

Info

Publication number: WO2022202438A1
Application number: PCT/JP2022/011296
Authority: WO
Inventors: 秀樹今峰; 俊裕大沼
Original assignee: いすゞ自動車株式会社
Priority date: 2021-03-20
Filing date: 2022-03-14
Publication date: 2022-09-29
Also published as: JP7310845B2; JP2022145345A

Abstract

This oil storage structure comprises: a case formed into the form of a bottomed box and having a first bottom section 11A on one-end side in a longitudinal direction and a second bottom section 11B on the other-end side in the longitudinal direction; an oil pan 20 that is provided so as to close an opening 12 in the second bottom section 11B from below and that stores oil; an oil strainer 22 immersed in oil in the oil pan 20; and a baffle plate 30 that extends upward from a position between the first bottom section 11A and the second bottom section 11B, extends in a width direction orthogonal to the longitudinal direction, and partitions the space inside the case into a first bottom section 11A side and a second bottom section 11B side.

Description

Oil storage structure and baffle plate

The present disclosure relates to an oil storage structure and a baffle plate, and particularly to technology suitable for storing engine oil.

Generally, an oil pan that stores engine oil is provided at the bottom of the engine. The engine oil in the oil pan is pumped up by the oil pump, supplied to each lubricating element, and then returned to the oil pan. In this manner, the engine oil is circulated (see Patent Documents 1 and 2, for example).

JP 2011-185121 A JP 2011-179482 A

An oil strainer is immersed in the engine oil in the oil pan as a filter to remove foreign matter from the engine oil pumped up by the oil pump. When the engine oil around the oil strainer moves forward from the oil pan during braking of the vehicle or the like, the intake port of the oil strainer is exposed to the air. In this case, the oil strainer may suck air from the suction port.

The technology of the present disclosure has been made in view of the above circumstances, and aims to prevent air from being sucked from the oil strainer by effectively holding the oil around the oil strainer in the oil pan. .

The oil storage structure of the present invention is formed in the shape of a box with a bottom, and has a first bottom on one longitudinal end and a second bottom on the other longitudinal end. an oil pan provided to block the opening from below and storing oil; an oil strainer immersed in the oil in the oil pan; and upward from a position between the first bottom and the second bottom. a baffle plate that extends in a width direction orthogonal to the longitudinal direction and divides the space in the case into the first bottom side and the second bottom side.

A bent portion bent from the upper end toward the oil strainer may be formed at the upper end of the baffle plate.

The second bottom portion is formed longer in the width direction than the first bottom portion, and a flange portion is provided at an end portion of the baffle plate in the width direction. and the side wall of the portion of the side wall of the case where the second bottom protrudes in the width direction beyond the first bottom so as to form a predetermined gap therebetween. A crank may be formed between the flange portion and the side wall.

The flange portion and a side wall facing the flange portion both extend in the width direction, and the crank is formed between the flange portion and the side wall and extends in the width direction. may include

The second bottom portion is formed lower than the first bottom portion, and both ends of the baffle plate in the width direction are provided with inclined portions that obliquely protrude toward the second bottom portion. The inclined portion may be provided with a flap closing a gap between a lower end of the inclined portion and the first bottom portion.

According to the technology of the present disclosure, by effectively retaining oil around the oil strainer in the oil pan, it is possible to prevent air from being sucked in from the oil strainer.

1 is a schematic longitudinal sectional view showing a lower structure of an engine having an oil storage structure according to this embodiment; FIG. FIG. 2 is a schematic plan view of the oil storage structure according to the present embodiment viewed from above; 1 is a schematic perspective view showing an oil storage structure according to this embodiment; FIG.

The oil storage structure and baffle plate according to this embodiment will be described below based on the accompanying drawings. The same parts are given the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[overall structure]
FIG. 1 is a schematic longitudinal sectional view showing the lower structure of an engine 10 having an oil storage structure according to this embodiment.

As shown in FIG. 1, the lower structure of the engine 10 mainly has a crankcase 11 (the case of the present disclosure) and an oil pan 20. A cylinder block (not shown) is provided on the upper portion of the crankcase 11 . A cylinder head (not shown) is provided above the cylinder block.

In this embodiment, the engine 10 is configured such that one longitudinal end of the crankcase 11 (left side in FIG. 1) is the front side, and the other longitudinal end side of the crankcase 11 (right side in FIG. 1) is the rear side. mounted on the vehicle. In the following description, the direction perpendicular to the longitudinal direction of the crankcase 11 is simply referred to as the width direction.

The crankcase 11 is formed so that the first bottom portion 11A on one end side is higher than the second bottom portion 11B on the other end side. In other words, the crankcase 11 is formed such that the second bottom portion 11B is lower than the first bottom portion 11A. A step surface portion 11C is provided between the

bottom portions

11A and 11B. A substantially rectangular opening 12 is provided in the second bottom portion 11B of the crankcase 11 .

The oil pan 20 is formed in the shape of a container with a concave cross-section that opens upward. The oil pan 20 is attached with bolts (not shown) or the like so as to block the opening 12 provided in the second bottom portion 11B of the crankcase 11 from below. Engine oil is stored in the oil pan 20 . An oil strainer 22 is immersed in the engine oil for removing foreign matter from the engine oil pumped up by an oil pump (not shown).

In this embodiment, a baffle plate 30 is provided between the first bottom portion 11A and the second bottom portion 11B of the crankcase 11 . The baffle plate 30 partitions the space inside the crankcase 11 into the first bottom portion 11A side and the second bottom portion 11B side. This baffle plate 30 is designed to restrict engine oil in the oil pan 20 from moving from the second bottom portion 11B side (oil pan 20 side) to the first bottom portion 11A side (front side) when the vehicle suddenly brakes. function. Details of the baffle plate 30 will be described below.

[Baffle plate]
FIG. 2 is a schematic plan view of the oil storage structure according to this embodiment viewed from above. FIG. 3 is a schematic perspective view showing the oil storage structure according to this embodiment. In FIG. 3, the crankcase 11 and the oil pan 20 are shown in a partially notched state, and the illustration of the oil strainer 22 is omitted.

As shown in FIGS. 2 and 3, the second bottom portion 11B of the crankcase 11 is formed longer in the width direction than the first bottom portion 11A. A pair of side

wall surface portions

11D and 11E extending in the width direction from each end portion of the stepped surface portion 11C are provided between them.

The baffle plate 30 extends upward from the upper edge of the step surface portion 11C. The baffle plate 30 also includes a main plate portion 31 extending in the width direction of the crankcase 11 and a pair of inclined plate portions obliquely extending from the width direction end portions of the main plate portion 31 so as to protrude toward the second bottom portion 11B. 32, 33. That is, about half of the circumference of the oil strainer 22 facing the stepped surface portion 11</b>C is surrounded by the main plate portion 31 and the

inclined plate portions

32 and 33 of the baffle plate 30 .

In this way, approximately half the area on the front side of the oil strainer 22 is surrounded by the main plate portion 31 and the

inclined plate portions

32 and 33 . As a result, engine oil around the oil strainer 22 can be effectively prevented from moving from the second bottom portion 11B side to the first bottom portion 11A side when the vehicle is braked or the like.

A bent portion 34 is provided at the upper end of the main plate portion 31 and the upper end of each inclined plate portion 32 . The bent portion 34 is a portion where the upper end of the main plate portion 31 and the upper ends of the inclined plate portions 32 are bent toward the second bottom portion 11B where the oil strainer 22 is located. By providing such a bent portion 34, the upward flow of engine oil from the oil pan 20 side along the side surfaces of the stepped surface portion 11C and the baffle plate 30 is blocked when the vehicle is suddenly braked. As a result, it is possible to reliably prevent engine oil from moving toward the first bottom portion 11A.

A pair of flaps 36, 37 (shown only in FIG. 2) extending toward the upper end of the stepped surface portion 11C are provided at the lower ends of the

inclined plate portions

32, 33. The

flaps

36, 37 block the gap between the lower ends of the

inclined plate portions

32, 33 and the upper end of the step surface portion 11C. The

flaps

36 and 37 are formed in a substantially triangular shape when viewed from above. The

flaps

36, 37 extend horizontally as an example. By providing

such flaps

36 and 37 at both ends of the baffle plate 30, the upward engine oil from the oil pan 20 can flow out to the first bottom portion 11A side of the crankcase 11 through the gaps at both ends of the baffle plate 30. can be effectively prevented.

A pair of

flange portions

38 and 39 extending in the width direction from the ends of the

inclined plate portions

32 and 33 are respectively provided at the ends of the

inclined plate portions

32 and 33 . Of the

flange portions

38 and 39, the flange portion 38 extends in the width direction. The flange portion 38 faces the side wall surface portion 11D of the crankcase 11 with a predetermined gap therebetween. Thereby, a crank is formed between the flange portion 38 and the side wall portion 11D. By providing such a crank, the engine oil returned from each lubricating element of the engine 10 to the first bottom portion 11A of the crankcase 11 is rectified along the side surfaces of the

inclined plate portions

32 and 33, and flows through the oil pan 20. back to the side. By providing the crank, the engine oil in the oil pan 20 can be effectively prevented from flowing out to the first bottom portion 11A side. In addition, in the illustrated example, the flange portion 39 is folded backward. However, the orientation of each of the

flange portions

38 and 39 can be appropriately set according to the peripheral layout.

Specifically, the crank has a first passage formed between the flange portion 38 and the side wall portion 11D, and a second passage formed between the inclined plate portion 32 and the inner wall surface of the first bottom portion 11A. It is formed with The first passage extends, for example, in the width direction of the crankcase 11 (vertical direction in FIG. 2). A portion of the first passage, which serves as an inlet for the engine oil in the oil pan 20 , faces the crankcase 11 not in the longitudinal direction but in the width direction. With such a configuration, even if the engine oil in the oil pan 20 moves toward the baffle plate 30 during sudden braking of the vehicle, it is difficult for the oil to flow into the first passage. Therefore, it is possible to effectively prevent movement of the engine oil from the oil pan 20 side to the first bottom portion 11A side.

Here, the position of the baffle plate 30 in the crankcase 11 may be appropriately set according to the specific specifications of the engine 10 and the like.

For example, if the baffle plate 30 is too close to the oil strainer 22, the oil storage space S defined by the baffle plate 30 and the oil pan 20 (see FIGS. 1 and 2) becomes narrow. As a result, the amount of engine oil retained around the oil strainer 22 is reduced. During sudden braking of the vehicle, engine oil is less likely to flow from the first bottom portion 11A side of the crankcase 11 to the second bottom portion 11B (oil pan 20) side. If the baffle plate 30 is configured too close to the oil strainer 22, under such circumstances, if engine oil continues to be supplied to each lubricating element by the oil pump, there is a possibility that the engine oil around the oil strainer 22 will be extremely reduced. be. Then, the oil strainer 22 may suck air.

On the other hand, if the baffle plate 30 is moved too far from the oil strainer 22, the oil storage space S defined by the baffle plate 30 and the oil pan 20 becomes wider. If the oil storage space S is wide, it becomes difficult to store a sufficient amount of engine oil around the oil strainer 22, and as a result, the oil strainer 22 may suck in air.

From this point of view, the baffle plate 30 is preferably located at a position where the oil reservoir space S defined by the baffle plate 30 and the oil pan 20 can always hold an appropriate amount of engine oil. Specifically, it is preferable to set a position where the engine oil can be reliably held and stored around the oil strainer 22 over a period from braking of the vehicle to stopping of the vehicle.

According to the present embodiment described in detail above, the space inside the crankcase 11 is divided into the first bottom portion 11A side and the second bottom portion 11B side between the first bottom portion 11A and the second bottom portion 11B of the crankcase 11. A baffle plate 30 is provided. Therefore, the engine oil is effectively prevented from moving forward from around the oil strainer 22 arranged on the second bottom portion 11B side when the vehicle is suddenly braked. As a result, the engine oil can be effectively retained around the oil strainer 22, and air intake from the oil strainer 22 can be reliably prevented.

Also, the configuration of this embodiment is a simple configuration in which the baffle plate 30 is attached to the crankcase 11 . Therefore, the oil storage space S defined by the baffle plate 30 and the oil pan 20 can be appropriately set according to various specifications of the engine, the specific shape of the crankcase 11, and the like. Such a configuration can effectively cope with design changes and specification changes.

[others]
It should be noted that the present disclosure is not limited to the above-described embodiments, and can be modified and implemented as appropriate without departing from the gist of the present disclosure.

For example, in the above embodiment, the oil storage structure is described as an engine oil storage structure, but it can be widely applied to other oil storage structures such as transmissions, clutch devices, and differential gear devices. .

DESCRIPTION OF SYMBOLS 10... Engine, 11... Crankcase (case), 11A... 1st bottom part, 11B... 2nd bottom part, 12... Opening, 20... Oil pan, 22... Oil Strainer 30 Baffle plate 31

Main plate portion

32, 33 Inclined plate portion 34

Bent portion

36, 37

Flap

38, 39 Flange portion

Claims

a case formed in the shape of a box with a bottom and having a first bottom on one end in the longitudinal direction and a second bottom on the other end in the longitudinal direction;
an oil pan provided to block an opening provided in the second bottom from below and storing oil;
an oil strainer immersed in the oil in the oil pan;
Extending upward from a position between the first bottom portion and the second bottom portion and extending in a width direction perpendicular to the longitudinal direction, the space inside the case is divided into the first bottom portion side and the second bottom portion side. A baffle plate that partitions,
an oil reservoir structure.
The upper end of the baffle plate is provided with a bent portion bent from the upper end toward the oil strainer,
The oil storage structure according to claim 1.
The second bottom is formed longer in the width direction than the first bottom,
A flange portion is provided at an end portion of the baffle plate in the width direction,
The flange portion is configured such that a predetermined gap is formed between the flange portion and a portion of the side wall of the case where the second bottom portion protrudes in the width direction beyond the first bottom portion. so that a crank is formed between the flange portion and the side wall.
The oil storage structure according to claim 1 or 2.
Both the flange portion and a side wall facing the flange portion extend in the width direction,
The crank includes a first passage formed between the flange portion and the side wall and extending in the width direction,
The oil storage structure according to claim 3.
The second bottom is formed lower than the first bottom,
Both ends of the baffle plate in the width direction are provided with inclined portions projecting obliquely toward the second bottom portion,
The inclined portion is provided with a flap that closes a gap between the lower end of the inclined portion and the first bottom,
The oil storage structure according to any one of claims 1 to 4.
The baffle plate according to any one of claims 1 to 5.