Spark ignition engine exhaust system

Details Spark ignition engine exhaust system Spark ignition engine exhaust system

1994-02-14

1995-03-14

Lazarus, Ira S.

Power plants

Internal combustion engine with treatment or handling of...

Methods

60287, 60297, 60300, 60311, F01N 320

Patent

active

053967640

ABSTRACT:
An exhaust system for a spark ignition engine on an automotive vehicle including an exhaust filter disposed downstream of a spark ignition engine for condensing hydrocarbons in exhaust gases from the engine during a first time period after start of the engine, a bypass structure for bypassing at least a portion of exhaust gases around the exhaust-filter to heat the exhaust filter during a second time period after the first time period and evaporate the condensed hydrocarbons, and a catalytic converter disposed downstream of the exhaust filter to oxidize the evaporated hydrocarbons and reduce NO.sub.x in exhaust gases passing therethrough. A method is also provided.

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patent: 4519820 (1985-05-01), Oyobe et al.
patent: 4669261 (1987-06-01), Worner et al.
patent: 5089237 (1992-02-01), Schuster et al.
patent: 5138836 (1992-08-01), Pfister

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