Temperature actuated zeolite in-line adsorber system

Details Temperature actuated zeolite in-line adsorber system Temperature actuated zeolite in-line adsorber system

1994-04-28

1996-12-10

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

60288, 60297, F01N 328

Patent

active

055820034

ABSTRACT:
A engine exhaust system is disclosed for reducing the amount of hydrocarbons emitted during engine start-up (cold-start), before the catalytic converter has attained its effective operating temperature. The system includes a flow control device, in particular a bi-metallic flap, occupying a first position at the first temperature to direct substantially all of the engine exhaust through a molecular sieve structure to adsorb the hydrocarbons, and a second position at the second temperature, to direct the engine exhaust stream directly from the light-off catalyst to the burnoff catalyst, bypassing the molecular sieve structure.

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patent: 5315824 (1994-05-01), Takeshima
patent: 5373696 (1994-12-01), Adamczyk

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