JPH0619781Y2 - Engine oil intake structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement of an oil intake structure of an engine such as an engine having an oil pan in a lower portion.

[Prior art]

The engine is equipped with an oil pan that collects oil at the bottom of the engine case, pumps the oil, pressurizes it, supplies it to each part of the engine, and collects the lubricated oil in the oil pan for reuse. There is.

FIG. 3 is a cross-sectional view showing an example of an oil intake portion of an engine, in which an outer rotor 3 is driven by an inner rotor 2 fixed to a drive shaft 1 of an oil pump P, and an intake pipe 5 attached to a casing 4. The oil O is sucked in further and is sent to each part of the engine through the discharge port 6.

A strainer 7 is attached to the tip of the suction pipe 5, and the strainer 7 is composed of a plate 8 and a hemispherical filter body 9 (mesh) provided below the plate 8.

[Problems to be solved by the device]

However, since the hemispherical filter body 9 faces downward in the oil intake portion of the engine having the above-described structure, when the oil O largely undulates like W as shown in FIG. There is a possibility that the liquid surface of the oil O will come off from the suction port 5a and the air A will be sucked. In this way, the air A from the suction port 5a
When it is sucked, it enters the flow path of the oil O of the engine and the like, obstructs the flow of oil and causes poor lubrication, which hinders the operation of the engine.

As other known techniques, Japanese Utility Model Publication No. 58-81305 and Japanese Utility Model Publication No. 57-3
No. 811 and Japanese Utility Model Publication No. 52-47770 are proposed.

The device of Japanese Utility Model Laid-Open No. 58-81305 is provided with an opening on the lower surface of a strainer, and a U-shaped or U-shaped cover plate is hung below the opening so that the front side is opened. Oil is blocked by the cover plate and the oil in the cover plate is sucked.

This device is configured so that air bubbles will not be contained in the oil when the vehicle leans, and it is possible to expect its effect when the viscosity of the oil is considerably low, The device of this construction has an inherent drawback when starting the engine when the engine temperature is low.

Oil is sucked in through the opening provided on the bottom surface of the strainer, but when the engine temperature is low, the oil viscosity is low, and the oil level is low, the internal pressure of the strainer is negative. Becomes higher, and the oil forms a parabolic surface having this opening as a bottom surface, and the liquid surface near the opening rapidly decreases. In this state, a large amount of air bubbles are sucked together with the oil, and the oil supply becomes insufficient, which causes engine trouble.

The device disclosed in Japanese Utility Model Laid-Open No. 57-3811 is a device in which a flat strainer body is box-shaped and a plurality of suction ports are formed in the upper plate of the body, and the oil pan resonates due to the pulsation of the oil pump. It is intended to prevent the generation of low frequency noise.

Since the oil intake of this device is limited to the upper plate of the main body, the upper plate is easy when the oil level drops below this upper plate or while the vehicle is operating. It is exposed to the air and sucks air from the intake port, which causes the engine trouble as described above.

Japanese Utility Model Publication No. 52-47770 is a device for a lubricating oil filter of a hermetic electric compressor, in which an oil inlet is provided around the upper part of the oil filter provided below the oil suction port for lubrication. It is designed to suck the oil in the upper layer portion of the oil, and it does not solve the problem of sucking bubbles when the oil surface is considerably lowered and the vehicle leans.

[Purpose of device]

The present invention has been made to solve the problems of the conventional oil intake part of an engine, and it is possible to reduce the liquid level of oil considerably even if the liquid level is inclined depending on the running condition of the vehicle. (EN) Provided is a device that does not suck air into a strainer.

[Summary of the Invention] An engine oil intake portion structure according to the present invention for achieving the above object has an opening at an upper portion and a small hole 13 at a lower portion.
A strainer (10) consisting of a liquid reservoir 12 consisting of a hemispherical shell having and a filter body (11) provided to cover the opening,
The lower end of the suction pipe (5) of the oil pump is provided so as to pass through the central portion of the filter body 11, and the liquid reservoir 12 is arranged so as to face a recess formed in the bottom of the oil pan 16 of the engine. Is configured.

That is, the strainer 10 has a liquid reservoir 12 made of a hemispherical shell with an opening upward, so that oil is supplied through a filter 11 such as a mesh provided in the opening. Has become. In addition, a small hole 13 is opened in the lower part of the liquid reservoir 12, and oil can be sucked from this small hole 13 as well.

Therefore, when the oil pan 16 has sufficient oil, the oil filtered by the filter 11 is smoothly sucked by the oil pump from the suction pipe 5.

And even when the oil level is considerably lowered, when the liquid level of the oil is moving due to the movement of the vehicle, the oil is supplied into the liquid reservoir 12 that opens upward and is sucked by the oil pump, Always have spare oil.

Further, since the small hole 13 is opened in the lower part of the liquid reservoir 12, the oil is supplied from the small hole 13 into the liquid reservoir 12.

Therefore, even if the liquid surface of the oil is greatly shaken when the vehicle is braked and the strainer 10 is exposed from this liquid surface, the oil is sucked in the oil pump because the oil is stored in the liquid reservoir 12. No air is sucked from the tube 5.

Furthermore, when the engine is started with the oil level lowered, the oil is supplied through the small holes 13 on the bottom surface of the liquid reservoir 12, so it is possible to prevent the oil from containing a large amount of bubbles. It is possible to prevent the occurrence of engine trouble due to poor oil supply.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing an essential part of an oil intake portion structure of an engine of the present invention, in which a strainer 10 is provided below a suction pipe 5 connected to an oil pump P. This strainer 10 has a liquid reservoir 12 formed by a hemispherical shell according to the present invention.
And is mounted so that the opening is located above.

A filter body 11 is provided so as to close the opening, the suction pipe 5 is fixed to the center of the filter body 11, and a small hole 13 is opened in the center of the bottom of the liquid reservoir 12. There is.

This small hole 13 serves not only as an oil suction port but also as a discharge port for dust and the like, and when the liquid level of the oil is significantly lowered, the small hole 13 can suck oil. .

The strainer 10 is fixed by tightening a fixing band 15 by squeezing the center portion of a filter body 11 made of a mesh to match the outer diameter of the suction pipe 5.

The strainer 10 is located in a recess formed in the bottom of the oil pan 16 and is mounted at a position slightly elevated from the bottom surface, and is immersed in oil under normal engine operating conditions. Therefore, the oil is filtered 11
Of the suction pipe 5 after being filtered from above and supplied to the liquid reservoir 12.
It is further sucked and pressurized in the rotor part, and the discharge port 6
Is supplied to each part of the engine.

If the strainer 10 is exposed above the liquid level W due to a large undulation of the oil depending on the running condition, for example, when the vehicle brakes, when the oil is consumed considerably, Although the oil is not supplied, in this case, since the oil is stored in the liquid reservoir 12, the air A is not sucked through the suction port 5a of the suction pipe 5.

Further, it is rare that the liquid level drops below the upper surface of the liquid reservoir 12 when the engine is stopped due to the decrease in the oil level. At such a time, oil is supplied through the small hole 13 opened at the bottom of the liquid reservoir 12 provided so as to face the recess formed in the oil pan 16.

If the liquid reservoir 12 is sealed, a negative pressure will be generated in the liquid reservoir 12 when the engine is started.However, in the present invention, a small hole 13 is opened at the bottom of the liquid reservoir 12. Therefore, oil will be sucked in from this, so engine trouble will not occur. In addition, this liquid reservoir 12
When dust enters inside, it is discharged through this small hole 13.

FIG. 2 shows another embodiment, in which the filter body 11 is formed of a perforated plate, the central portion of which is formed into a pipe shape, and the nut portion is formed, and the bolt 15 is screwed into this. It is fixed.

[Effect of device]

A structure of an oil intake portion of an engine according to the present invention includes a liquid reservoir 12 having a hemispherical shell having an opening at an upper portion and a small hole 13 at a lower portion, and a filter body covering the opening. A strainer 10 composed of 11 and 11 is provided such that the lower end of the suction pipe 5 of the oil pump is inserted through the central portion of the filter body 11, and the liquid reservoir 12 is formed in the bottom of the oil pan 16 of the engine. It is configured to face inside. Therefore, the present invention can bring about the following effects.

1) The main body formed of a semicircular shell, that is, the liquid reservoir 12 is installed so as to face the recess formed in the bottom surface of the oil pan 16, so that the oil level is sufficiently lowered even if the liquid level is considerably lowered. Can be sucked into the pump P.

2) Even when the upper surface of the strainer 10 is slightly exposed from the liquid surface of the oil, the movement of this liquid surface, especially the wave generated on the liquid surface due to the running of the vehicle causes Therefore, the oil is always stored in the liquid reservoir 12 though a small amount. Therefore, the lower end portion of the oil suction pipe 5 is not exposed to the air, and it is possible to prevent the occurrence of engine trouble caused by sucking air and causing poor lubrication.

3) Even when the liquid level of the oil drops below the liquid reservoir 12, since the small hole 13 is opened at the bottom of the liquid reservoir 12, the oil is supplied from this, especially in the engine. When the engine is started when the temperature is low, the engine trouble due to sucking a large amount of bubbles does not occur.

[Brief description of drawings]

FIG. 1 is a sectional view showing an essential part of an oil intake portion structure of an engine according to the present invention, FIG. 2 is a sectional view of a similar portion according to a second embodiment, and FIG. 3 is composed of an oil pump and a strainer. It is sectional drawing which shows the oil suction part structure. P ... Oil pump, O ... Oil, W ... Liquid level, 1 ... Drive shaft, 2 ... Inner rotor, 3 ... Outer rotor, 4 ... Casing, 5 ... Suction pipe, 5a ... Suction port, 7, 10 ... Strainer, 8 ... Plate, 9, 11 ... Filter body, 12 ... Liquid reservoir, 13 ...
Small hole, 14… fixing band, 15… bolt, 16 oil pan.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Hiroshi Minami 8 Fujisawa, Kanagawa Pref. Tsunatan, Isuzu Motors Co., Ltd. Fujisawa Plant (72) Yutaka Matsushima 8s Kanagawa, Fujisawa, Co. Ltd. Isuzu Motors Co., Ltd. Fujisawa Plant (72) 72) Inventor Masaki Kitagawa 8 Tsutana, Fujisawa City, Kanagawa Prefecture Inside the Isawa Motor Co., Ltd. Fujisawa Plant (72) Inventor, Sake Ko Keimei 3-22-5 Chuorinkan, Yamato City, Kanagawa Prefecture

Claims (1)

[Scope of utility model registration request] 1. A liquid reservoir (12) consisting of a hemispherical shell having an opening at the top and a small hole (13) at the bottom, and a filter body (11) provided covering the opening. Strainer (10) consisting of
The lower end of the suction pipe (5) of the oil pump is provided so as to pass through the center of the filter body (11), and the liquid reservoir (12) is further formed in the bottom of the oil pan (16) of the engine. The oil intake structure of the engine that is placed facing inside.