Method and apparatus for filtering engine exhaust

Details Method and apparatus for filtering engine exhaust Method and apparatus for filtering engine exhaust

1994-12-27

1995-11-28

Kamen, Noah P.

Power plants

Internal combustion engine with treatment or handling of...

By sorber or mechanical separator

F01N 302

Patent

active

054697026

ABSTRACT:
A filtering apparatus (12) includes a filter cartridge (28) which may be replaced or cleaned and re-used. The filter apparatus also includes a heat exchanger (62) which receives cooling air to cool the exhaust prior to filtering. The cooled exhaust does not pose combustion problems for soot or the filter material in the cartridge (28). In addition to cooling the exhaust, a temperature-sensitive valve (36) opens and closes to prevent excessively hot exhaust gas from reaching the filter cartridge (28). The valve (36) includes bi-metal discs (52) which bow outward when the temperature increases and flatten when the temperature decreases. The discs engage a cover to an orifice and slide axially to open and close the valve (36). The apparatus also may include a back pressure valve (72) which will open when the exhaust flow is backed up to prevent damage to the engine.

REFERENCES:
patent: 3100146 (1963-08-01), Huntington
patent: 3153579 (1964-10-01), Levey et al.
patent: 3222140 (1965-12-01), Scivally et al.
patent: 3666422 (1972-05-01), Rossel
patent: 3738089 (1973-06-01), Brill
patent: 3831377 (1974-08-01), Morin
patent: 3967445 (1976-07-01), Manfredi
patent: 4319453 (1982-03-01), Mann
patent: 4732678 (1988-03-01), Humbert

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