JPS6140885Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a blow-by gas reducing device, and more particularly to a blow-by gas reducing device having a structure in which an engine crankcase and an air cleaner communicate with each other.

Blowby gas contains a lot of acidic components and moisture, and to prevent oil deterioration and rust formation, the crankcase needs to be ventilated. Therefore, the crankcase is generally ventilated using a blow-by gas reduction device, which includes a shield system that connects the air cleaner and the engine crankcase with a hose, and a shield system that seals the rest Positive
There are oven systems and closed systems that use Crankcase Ventilation (Crankcase Ventilation) valves. By the way, in the above-mentioned shield system as well as in the above-mentioned closed system, the crankcase and the air cleaner are communicated through a hose, and in order to purify the air flowing into the hose, the air cleaner shown in Fig. 1 is used. An element 3 made of felt, spongy material, etc. is provided on the air cleaner 2 side of the hose 1. Note that this element 3 is connected to the air cleaner 2 as shown in FIG.
It is housed in a case 4 that is fixed to the inside by spot welding or the like.

However, in such a conventional blow-by gas reduction device, the element 3 is fully housed in the space inside the case 4, and the lower end of the element 3 is in contact with the bottom surface 4a of the case 4. Therefore, when oil in the crankcase rises in the two directions of the air cleaner together with blow-by gas (for example, in a sealed system, oil buildup occurs constantly while the engine is running, and in a closed system, the PCV valve is blocked). (Oil build-up occurs during high loads), and the above-mentioned oil permeates into the element 3, resulting in an increase in resistance and shortening of the life of the element 3.

In view of these conventional problems, the present invention creates a space below the element, stores oil in this space, and returns the collected oil to the crankcase to improve the resistance of the element. The purpose of this invention is to increase the amount of blow-by gas passing through by reducing the amount of blow-by gas, and to improve durability.

In order to achieve this purpose, the present invention has a structure in which the engine crankcase and the air cleaner are communicated via a hose, and the air cleaner side of the hose has a structure for purifying the air flowing into the hose. In a blow-by gas reduction device equipped with a case for storing an element, an oil reservoir is formed in a lower part of the case with a space between it and the lower end of the element, and
The hose connector is formed so as to be horizontally or smoothly inclined downward from the oil reservoir toward the hose.

Therefore, in the blow-by gas reduction device of the present invention, the oil that rises through the hose once permeates into the element, but this permeated oil condenses and drips into the oil reservoir. Since the oil is returned to the crankcase from the oil reservoir via the hose, it has the excellent effect of significantly reducing the resistance to passage of the element and extending the life of the element, thereby improving durability. play.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. Incidentally, in describing this embodiment, the same parts as those in the conventional structure will be given the same reference numerals.

That is, FIG. 3 is a sectional view of a main part showing an embodiment of the present invention, in which a case 4' is provided inside the air cleaner 2. This case 4' is integrally molded with synthetic resin, and has a storage section 4'b that stores the element 3.
, an oil reservoir section 4'c formed with a step S below this storage section 4'b, and a hose connector 4' extending approximately horizontally from the bottom surface 4'd of this oil reservoir section 4'c. e is formed. This hose connector 4'e projects outward from the opening of the air cleaner 2, and a crankcase (not shown) is communicated with the inside of the cylinder head cover via the hose 1. Furthermore, a clip 5 is integrally formed and projected from the case 4, so that the case 4 can be attached to the mounting opening 2a of the air cleaner 2 with one touch via the clip 5.

Incidentally, when the element 3 is stored in the storage portion 4'b, the lower end of the element 3 is locked to the upper surface of the step S.

With the above configuration, the atomized oil in the crankcase that rises together with the blow-by gas through the hose 1 adheres to the element 3. When this attached oil reaches a certain amount, it condenses with each other and drips into the oil reservoir 4'c.
From the oil reservoir 4'c, the oil is returned to the crankcase via the hose 1 along the hose connector 4'e. Therefore, oil does not penetrate into the element 3 to the extent that it can prevent blow-by gas from passing through, and a substantially constant amount of blow-by gas passing can always be obtained. Furthermore, since the amount of oil that permeates into the element 3 is small, deterioration of the element 3 due to oil is reduced and durability is improved.

By slanting the hose connector 4'e downward smoothly, the oil accumulated in the oil reservoir 4'c can be smoothly discharged.

FIG. 4 shows another embodiment in which the case 4'' is formed of a metal plate. Even in this case, an oil reservoir 4'c is formed, and a hose connector 4 is provided in this oil reservoir 4'c. By forming 'e, it is possible to obtain effects such as reducing the resistance of the element 3 and improving durability, similar to the embodiment shown in FIG. 3.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the main parts of a conventional blow-by gas reduction device, Fig. 2 is a perspective view of the part shown in Fig. 1, and Fig. 3 is a main part of a blow-by gas reduction device which is an embodiment of the present invention. FIG. 4 is a cross-sectional view of a main part showing another embodiment of the present invention. 1...Hose, 2...Air cleaner, 3...Element, 4, 4', 4''...Case, 4'c...
Oil reservoir, 4'e...Hose connector, 5...
…Clip.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) It has a structure in which the engine crankcase and the air cleaner are communicated via a hose, and the air cleaner side of the hose has a structure for purifying the air flowing into the hose. In a blow-by gas return device equipped with a case that houses an element, an oil reservoir is formed in the lower part of the case with a space provided between the lower end of the element and a hose connector is connected from the oil reservoir. A blow-by gas reducing device characterized in that the blow-by gas reducing device is formed so as to be horizontally or smoothly inclined downward toward the hose. (2) The blow-by gas reducing device according to claim 1, wherein a clip is protruded from the case, and the case is attached to the air cleaner with a single touch via the clip.