Method and apparatus of purifying exhaust gas from internal comb

Details Method and apparatus of purifying exhaust gas from internal comb Method and apparatus of purifying exhaust gas from internal comb

1992-04-14

1993-06-15

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60299, 60301, 422172, 422180, F01N 328

Patent

active

052188175

ABSTRACT:
A catalyst body having carried in a carrier a three way conversion catalyst is disposed inside an exhaust pipe near an exit to the atmosphere. An internal combustion engine is operated in a rich range of air/fuel ratio. Reducing reaction of the exhaust gas takes place in a front portion of the catalyst body. Oxidizing reaction takes place in a rear portion of the catalyst body by intermittently introducing atmospheric air into the catalyst body through pulsations of the exhaust gas.

REFERENCES:
patent: 3809743 (1974-05-01), Unland
patent: 3852041 (1974-12-01), Moore et al.
patent: 4209493 (1980-06-01), Olson
patent: 4237099 (1980-12-01), Alley et al.
patent: 5052178 (1991-10-01), Clerc

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