Exhaust gas purification device in variable combination of absor

Details Exhaust gas purification device in variable combination of absor Exhaust gas purification device in variable combination of absor

1990-10-25

1992-08-25

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60288, 422169, 4232137, F01N 328

Patent

active

051408112

ABSTRACT:
An exhaust gas purification device for purifying exhaust gas of an engine, having an absorbent trapper absorptive of hydrocarbons in the exhaust gas up to a first gas temperature such as 200.degree. C. while releasing the absorbed hydrocarbons in the exhaust gas above a second gas temperature such as 400.degree. C., and a passage system responsive to the gas temperature for conducting the exhaust gas from the engine to pass through the absorbent trapper until the gas temperature rises up to the first gas temperate, to bypass the absorbent trapper when the gas temperature exceeds the first gas temperature, and to pass through the absorbent trapper and the catalytic converter in this order when the gas temperature exceeds the second gas temperature.

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patent: 4425143 (1984-01-01), Nishizawa et al.
patent: 4934142 (1990-06-01), Hayashi
patent: 4985210 (1991-01-01), Minami
patent: 5051244 (1991-09-01), Dunne

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