F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
F01N 3/30 (2006.01) F01N 3/08 (2006.01) F01N 3/28 (2006.01) F01N 3/32 (2006.01) F01N 13/02 (2010.01) F01N 13/04 (2010.01) F01N 7/02 (2006.01) F01N 7/04 (2006.01)
Patent
CA 2161842
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 diverter, in particular a secondary air jet adapted to direct substantially all of the engine exhaust through a molecular sieve structure during cold-start, and to direct the engine exhaust stream directly from the light-off catalyst to the burnoff catalyst, bypassing the molecular sieve structure after light-off.
Guile Donald Lloyd
Ketcham Thomas Dale
Corning Incorporated
Gowling Lafleur Henderson Llp
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