JPS6318736Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> This invention relates to an oil cooler with a bypass valve.

<<Prior Art>> As shown in FIG. 1, a lubricating oil supply method for an automobile engine is to supply lubricating oil stored in an oil pan 2 at the bottom of an engine 1 to an oil pump 3.
The lubricating oil is supplied to each part of the engine 1 through an oil cooler 4 and an oil filter 5 arranged in series therewith. However, when starting the engine or in cold weather, the lubricating oil is at a low temperature and has a high viscosity, so the lubricating oil not only does not need to pass through the oil cooler 4, but instead passes through the oil cooler 4. Since the flow resistance becomes large and the load on the oil pump 3 becomes large, a bypass flow path is conventionally provided between the inlet of the oil cooler 4 and the oil filter 5, and a thermo valve, a relief valve, etc. are installed in this bypass flow path. A bypass valve mechanism 6 was installed.

Specific configurations of the bypass valve mechanism 6 include, for example, as disclosed in Japanese Utility Model Application No. 54-152829, bypass piping is provided separately from the oil cooler and the valve mechanism is disposed there; Alternatively, there are two types in which a bypass passage is provided above and below a plurality of partition plates for exchanging oil and water heat constituting the oil cooler, and a valve mechanism is provided within this passage.

However, the oil cooler having such a structure has the following problems.

<<Problems to be solved by the invention>> In other words, in the former case, piping and assembly are troublesome and the configuration is complicated. On the other hand, the latter has the advantage of simplifying piping and assembly because the mechanism is integrated into the oil cooler, but has the disadvantage of increasing the overall height because bypass passages are provided above and below the partition plate. It was hot.

This invention was made in view of the above-mentioned drawbacks of the conventional technology, and when the above-mentioned bypass valve mechanism is incorporated into an oil cooler, it is possible to secure a sufficient bypass flow path without increasing the overall height of the oil cooler. Moreover, the purpose is to enable easy installation of a bypass valve mechanism.

<Means for Solving the Problems> In order to achieve the above object, this invention provides an oil cooler in which cooling water and lubricating oil exchange heat through a large number of partition plates arranged in the thickness direction. Located on the outer periphery of the partition plate, one end communicates with a lubricating oil supply path formed on one side in the thickness direction of the partition plate, and the other end communicates with a lubricant supply path formed on the other side in the thickness direction of the partition plate. A bypass flow path communicating with the oil discharge side path is formed by a cover plate extending on the same plane as the end plate of the oil cooler, and a pair of plates provided above and below the partition plate are connected to the bypass flow path. extending within, and
A bypass valve mechanism was installed between the upper and lower plates.

<Operation> According to the oil cooler with a bypass valve configured as described above, a bypass flow path is provided on one side of the partition plate in the thickness direction by a cover plate extending on the same plane as the end plate, and the bypass flow path is provided above and below the partition plate. Since the bypass valve mechanism is disposed between the plates, the thickness for incorporating the valve mechanism is ensured, and the bypass valve mechanism can be easily incorporated without increasing the height of the oil cooler.

<<Example>> Hereinafter, an example of this invention will be described in detail using the drawings.

FIG. 2 shows an oil cooler according to this invention.

This oil cooler includes upper and lower end plates 10, 12 that are open at the center, and a plurality of partition plates 14, 14 that are also open at the center and arranged in a stacked manner between the end plates 10, 12.
It basically consists of.

A pipe 16 for an inlet port of cooling water is integrated into one side of the lower end plate 12, and a pipe 18 for an outlet port is also integrated into one side of the upper end plate 10.
The cooling water supplied from 6 is discharged from a pipe 18 while meandering inside the partition plate 14 in a maze-like manner.

Further, concave portions 20 and 22 are formed in the central periphery of each end plate 10 and 12, and a plurality of oil circulation holes 2 are formed in the inner circumferential portion of the concave portions 20 and 22, respectively.
4, 24... are formed.

The recess 20 on the lower end plate 12 side communicates with an oil circulation mounting base (not shown) connected to the oil pump side, and the recess 22 on the upper end plate 10 side communicates with the base of an oil filter (also not shown). The oil cooler is attached to the mounting base together with the oil filter by screws passing through the central openings of the end plates 10, 12 and the partition plate 14.

The lubricating oil supplied from the mounting base passes through the hole 24 inside the partition plate 14, separate from the cooling water, and meandering in a maze-like manner as shown by the arrow, passing through the hole in the upper end plate 10 and passing through the oil filter. Discharge to the side.

In the oil cooler configured as above, a pair of cover plates 26, 26 are extended on the same plane at appropriate peripheral edges of each end plate 10, 12, and the peripheral edge of each cover plate 26 is flange-coupled. The interior is a liquid-tight space, and bypass holes 28, 28 are opened at the periphery of each end plate 10, 12 to communicate with this space, and lubricating oil is directly supplied from the supply side through this space. Enables passage to the discharge side,
In other words, it constitutes a bypass flow path.

In the space, each end plate 10,
12 and the partition plate 14, a pair of plates 30,
30 is arranged, and the space is connected to the lower end plate 12 side, the center part and the upper end plate 10 side.
It is divided into three small spaces on the side.

In the center of each plate 30, a third
As shown in the enlarged view, communication holes 32, 32 are formed as openings, and boss portions 34, 34 are formed by punching or the like toward the lower side at the peripheral edge of each communication hole.

A valve body 36 is disposed on the upper edge of the lower side communication hole 32, and the opening peripheral edge of this valve element 36 is arranged as a valve seat surface. A coil spring 38 supported on the periphery of the boss portion of 32 constantly urges the valve body 36 in the valve closing direction, and these constitute a relief valve mechanism.

Therefore, in the valve closed state shown in the figure, lubricating oil is discharged through the partition plate 14.

In this state, as mentioned above, the lubricating oil is kept at a high temperature, the oil viscosity is low, and therefore the oil path resistance is small, and the temperature is lowered appropriately by cooling water.
Supplied to the engine at the correct temperature.

Furthermore, when the engine is started when it is cold, the lubricating oil is at a low temperature, has a high viscosity, and has a large oil path resistance. On the other hand, since the cooling water is circulating, the oil passage resistance within the partition plate 14 increases, but due to the pressure increase accompanying this increase, the valve element 36 is pressed against the spring 3.
The flow hole 32 is opened against the spring pressure of 8, and as a result, the lubricating oil is bypassed and discharged to the space side.

<<Effects of the invention>> As explained in detail using the embodiments above, in the oil cooler with a bypass valve according to the invention, the oil cooler is Since the bypass flow path is formed on one side of the valve, a sufficient thickness for incorporating the valve mechanism can be secured without increasing the height. Furthermore, since the valve mechanism is arranged between a pair of plates provided above and below the partition plate, assembly is easy and the mechanism can be simplified.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a lubricating oil supply system for an automobile engine, FIG. 2 is an explanatory longitudinal cross-sectional diagram of an oil cooler with a bypass filter according to this invention, and FIG. 3 is an enlarged sectional view of section A in FIG. 2. 10, 12... End plate, 14... Partition plate, 16, 18... Pipe, 20, 22... Recess, 24... Hole, 26... Cover plate, 28
... bypass hole, 30 ... plate, 32 ... circulation hole, 34 ... boss section, 36 ... valve body, 38 ...
coil spring.

Claims (1)

[Scope of utility model registration request] In an oil cooler in which cooling water and lubricating oil exchange heat through a large number of partition plates arranged in the thickness direction, an oil cooler is provided on the outer periphery of the partition plate, and one end is formed on one side of the partition plate in the thickness direction. A bypass channel is provided on the same plane as the end plate of the oil cooler. A pair of plates provided above and below the partition plate extend into the bypass flow path, and a bypass valve mechanism is disposed between the plates. Oil cooler with bypass valve.