JPH09195745A - Oil strainer for engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent air from being inconveniently sucked into an oil pump at low level of oil, in an oil strainer forming a filter face on the opening part of a cover body, by arranging the opening part along the front side wall of the deepest part of the oil pan, so as to open oppositely to the front side wall. SOLUTION: The deepest part 2 of an oil pan 1 is provided on the rear lower side of an engine, and an oil strainer 4 is arranged here. This oil strainer 4 is provided with a filter face 7 on the opening part 6 of a cover body 5. and an oil suction pipe 8 is connected to a little lower part of the cover body 5. In this case, the opening part 6 is arranged so as to open in the direction opposed to the front side wall 9 of the deepest part 9. Hereby, when a vehicle is suddenly braked during running and deceleration is applied in the front direction F, even if lubricating oil 3 flows along the front side wall and oil surface 10 is largely inclined forward up, the opening part 6 is arranged so as not to be exposed from the oil surface 10, and hence air suction of an oil pump is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil strainer used for filtering lubricating oil in an oil pan of an engine and sending it to an oil pump.

[0002]

2. Description of the Related Art A conventional oil strainer 31 is provided with a cover body 32 facing directly below, as disclosed in Japanese Utility Model Publication No. 57-178108 and Japanese Utility Model Publication No. 57-78712. The filter surface 33 formed in the opening of the cover body 32 is generally configured to be substantially horizontal (FIG. 3).

[0003]

However, according to such a conventional example, when the amount of the lubricating oil accumulated in the oil pan 34 is relatively small, the vehicle is suddenly braked while the vehicle is traveling, When a large deceleration is applied to
Lubricating oil is caused to flow to the front part in the oil pan due to its inertial force, and the oil surface is greatly inclined forward and upward. for that reason,
A part of the filtering surface 33, which is installed substantially horizontally with the cover body 32 facing downward, may be exposed to the space from the oil surface, and the air is sucked into the oil pump together with the lubricating oil through the oil suction pipe 35, and There is a problem that inconvenience occurs due to aeration in the system. In addition, when the engine is mounted on the vehicle, if the area of the deepest part of the oil pan 34 cannot be set large, the problem that the filtration surface 33 of the oil strainer 31 cannot be arranged occurs.

[0004]

In order to solve the above problems, the present invention provides an engine oil in which a cover body is provided at the tip of the oil suction pipe, and a filter surface is formed in the opening of the cover body. In the strainer, the opening is arranged along the deepest front wall of the oil pan, and is opened in a direction facing the front wall.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples. FIG. 1 is a vertical side view of an embodiment of the present invention, and FIG. 2 is an explanatory view showing the flow of lubricating oil when a deceleration acts on the oil pan in the same direction. The engine of this embodiment is mounted in the front-rear direction of the vehicle, and the deepest portion 2 of the oil pan 1 is provided on the lower rear side of the engine. Further, the oil strainer 4 of the engine lubricating oil 3 has a filter surface 7 formed of a wire mesh in the opening 6 of the frustum-shaped cover body 5, and the cover body 5
The tip end of the oil suction pipe 8 is connected to the lower portion of the above, and the other end communicates with an oil pump (not shown). The opening 6 is opened so as to face the front side wall 9 of the deepest portion 2 of the oil pan 1, and the filtering surface 7 is arranged closely along the front side wall 9. The oil strainer 4 having the above configuration is arranged so that the cover body 5 and the filtering surface 7 thereof are immersed in the lubricating oil 3 of the oil pan 1. When the engine is operating, the lubricating oil 3 is filtered by the filtering surface 7 and enters the cover body 5, and then is sucked by the oil pump through the oil suction pipe 8.

Under such a situation, when the vehicle is suddenly braked while running and a large deceleration is applied in the forward direction F, as shown in FIG. 1 flows along the front side wall 9 to the front part of
Although 0 is greatly inclined forward and upward, the opening 6 is opened in a direction facing the front side wall 9 of the deepest portion 2 of the oil pan 1,
Since the filtering surface 7 is disposed closely along the front side wall 9, the opening 6 is not exposed from the oil surface 10 to the space 11, and air is not sucked into the oil pump. When the vehicle is accelerated in the forward direction F such as when the vehicle starts, the opening of the oil strainer is not exposed to the space because it is smaller than the acceleration during the sudden braking described above.

[0007]

According to the above construction, the opening is opened in a direction facing the front side wall at the deepest part of the oil pan, and the filtering surface formed on the opening is arranged along the front side wall. , Even when the vehicle is suddenly braked while running and a large forward deceleration is applied, the lubricating oil in the oil pan is pushed toward the front side wall by its inertial force, and from below along the front side wall. Since the oil flows upward, the lubricating oil always exists between the front side wall and the filtering surface, the filtering surface is not exposed from the oil surface to the space, and air is not sucked into the oil pump. Therefore, it is possible to prevent the occurrence of defects in the lubrication system due to aeration. Further, since the filtering surface is arranged along the front side wall, there is an advantage that it can be arranged even in the oil pan having the smallest deepest area.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the flow of lubricating oil in the vicinity of the oil strainer according to the embodiment of this invention.

FIG. 3 is a longitudinal sectional side view of a conventional example.

[Explanation of symbols]

 1 Oil Pan 2 Deepest Part 4 Oil Strainer 5 Cover 6 Opening 7 Filtering Surface 8 Oil Suction Pipe 9 Front Side Wall

Claims (1)

[Claims] 1. A cover body is provided at the tip of the oil suction pipe,
In an oil strainer for an engine in which a filter surface is formed in the opening of the cover body, the opening is disposed along the deepest front side wall of the oil pan, and is opened in a direction facing the front side wall. An oil strainer for the engine.