Exhaust gas particle filter for internal combustion engines

Details Exhaust gas particle filter for internal combustion engines Exhaust gas particle filter for internal combustion engines

1985-11-20

1987-04-21

Hart, Charles

Gas separation

Plural serial basically diverse separating media

Plural stages in unitary casing

55487, 55488, 55489, 55DIG30, 55512, 60311, B01D 3920

Patent

active

046593489

ABSTRACT:
The exhaust gas particle filter has a parabola shaped recess in the core ensuring that the inlet flow of the exhaust gases is directed towards the central filter part. The latter has a lower degree of separation relative to the outer filter part--caused by increased filter porosity and smaller mass--so that the exhaust gases flow through the central filter part in the initial phase. Its larger filter porosity and the small mass cause the temperature reduction of the exhaust gas flowing through to remain small so that a downstream supercharger can respond rapidly. Since the separation of soot particles initially occurs primarily in the central filter part, rapid deposition occurs--despite its low degree of separation--so that the resistance during the operation following the acceleration phase becomes similar to that of the surrounding outer filter part. The latter then offers the capacity of separating soot particles over a longer period without regeneration.

REFERENCES:
patent: 3365864 (1968-01-01), Iizima
patent: 3853484 (1974-12-01), Sudar et al.
patent: 3898063 (1975-08-01), Gazan
patent: 4264344 (1981-04-01), Ludecke et al.
patent: 4343149 (1982-08-01), Abthoff et al.
patent: 4419113 (1983-12-01), Smith
patent: 4436538 (1984-03-01), Tomita et al.

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