Incineration-cleanable composite diesel exhaust filter and vehic

Details Incineration-cleanable composite diesel exhaust filter and vehic Incineration-cleanable composite diesel exhaust filter and vehic

1980-05-07

1982-08-31

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By sorber or mechanical separator

55482, 55486, 55523, 55DIG30, F01N 302, B01D 4104, B01D 5000

Patent

active

043465579

ABSTRACT:
A composite exhaust filter particularly for use in diesel engine powered vehicles includes first and second filter sections disposed in series. The first filter section is a high-temperature depth-type filter material capable of collecting exhaust particulates with moderate efficiency while the second filter section is a high-temperature ceramic wall-flow monolith capable of collecting exhaust particulates on an extended gas porous surface with high efficiency. The vehicle system is provided with means such as an inlet throttle for increasing exhaust gas temperature to the ignition point of the collected particulates. Combustion initiated in the depth type first filter section generates a substantial amount of added heat which is carried to the second filter section, raising the surface temperature to a point where the particulates in the latter section are also incinerated.

REFERENCES:
patent: 1781254 (1930-11-01), Stelzner
patent: 3252270 (1966-05-01), Pall
patent: 3290870 (1966-12-01), Jensen
patent: 3937015 (1976-02-01), Akado
patent: 4211075 (1980-07-01), Ludecke
patent: 4276071 (1981-06-01), Outland

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