Gas separation – Plural serial basically diverse separating media – Plural stages in unitary casing
Patent
1990-12-26
1991-08-13
Hart, Charles
Gas separation
Plural serial basically diverse separating media
Plural stages in unitary casing
55323, 55487, 55489, 55527, B01D 4600
Patent
active
050393235
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to the engine manufacture and, more specifically, to automobile and tractor internal-combustion engines and, more particularly, to air cleaners.
BACKGROUND OF THE INVENTION
Known in the art is an air cleaner (V. E. Maev, N. N. Ponomarev. "Air-Cleaners for Automobile and Tractor Engines", 1971, "Machinostrojenie" Publishing House, (Moscow), p. 76-77) comprising a cylindrical housing positioned vertically, wherein en air-supply pipe is positioned coaxially therewith with the formation of an annular clearance between the outside surface of the tube and the inside surface of the housing. In the clearance there is provided a filtering member such as Kapron fibres placed into a rigid ring-shaped perforated cassette. The cassette height is less than the length of the air-supply pipe in the housing. In the direction of the air movement after the cassette an air-vent pipe is positioned which is directly connected to the inlet pipe of internal-combustion engines. The lower part of the housing which is its bottom is filled with an oil so that the outlet opening of the pipe is positioned above the level of the oil.
On the bottom of the housing coaxially with the pipe in the nulk of the oil a cup-like bath also filled with the oil is mounted. A jet of dusted air coming out of the air-supply pipe passes into the bath and displaces a layer of the oil therefrom by way of a dynamic head, and atomizes it. Drops of the atomized oil are intermixed with the air jet and wet the lower layers of the filtering member. The dusted air comes in contact with the oil which envelopes the dust particles and agglomerates them. Heavy particles of the dust with the excess of the oil get drained from the surface of the filtering member back into the lower part of the housing. The remaining dust particles with the air current penetrate into the lower oil-impregnated layers of the filtering member and get deposited on the fibres of the latter.
However, the dripping of the oil over the surface is non-uniform. In operation of an automobile or a tractor with such an air-cleaner under conditions of a rugged terrain there can take place inclinations of the air-cleaner which result in the situations where the oil excessively wets some regions of the filtering member and leaves other regions practically unwetted. The fibres of the filtering member only slightly wetted with the oil render a lower resistance to dust particle which, eventually, pass through the filtering member into the engine causing an early wear thereof. The excess of the oil from the abundantly wetted fibres also passsed into the engine with the dust, thus impairing its operation and causing wear too.
Also known is an air-clearer (FR, A 1536325) comprising a cylindrical housing, wherein substantially coaxially therewith an air-supply pipe is provided with the formation of a clearance between the outside surface of the tube and the inside surface of the housing and with a main filtering member positioned in said clearance. After the main filtering member along the direction of the air current an air-vent pipe is located communicating with the cavity of an internal-combustion engine and close to the lower end face of the housing on the side of the outlet opening of the pipe an additional filtering member is positioned. In the lower part of the housing between the end face and the additional filtering member oil is provided. The additional filtering member has a through opening coaxial with the air-supply pipe but with the size thereof considerably inferior to the air-supply pipe diameter.
In the engine operation a portion of the current of atmospheric air passing via the air-supply pipe penetrates into the through opening of the additional filtering member and, passing therethrough, contacts with the layer of an oil positioned under the additional filtering member in the lower part of the housing. The head of the dusted air is rather strong and pores of the additional filtering member constitute 1/2 of its volume, wherefore the oil dro
REFERENCES:
patent: 3791105 (1974-02-01), Rhodes
patent: 3923480 (1975-12-01), Visch
patent: 4673423 (1987-06-01), Yumlu
Andreev Vladimir V.
Glushkov Jury I.
Ulitsky Alexandr D.
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