F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
F01N 3/035 (2006.01) F01N 13/04 (2010.01) B01D 53/94 (2006.01) F01N 3/023 (2006.01) F01N 3/08 (2006.01) F01N 3/20 (2006.01) F01N 9/00 (2006.01)
Patent
CA 2309309
An exhaust gas purification system for an internal combustion engine including two integrated NO x trap-particulate filters arranged in parallel in the exhaust path. Each of the filters is used in the alternative to reduce NO x. Thus, one filter can be regenerated while the other is in use. A valve is used to direct the flow of exhaust gas to the respective exhaust filters. A nozzle for introducing reducing agents into each of the exhaust filters is provided in the exhaust path of each of the respective filters. An engine control module is also provided for monitoring the levels of absorbed NO x and particulate matter in each of the filters and generating control signals for the nozzles and the valve as a function of the absorbed NO x and particulate matter in each filter. In addition, an oxidation catalyst is located upstream of each of the respective exhaust filters.
Hammerle Robert
Hepburn Jeffrey
Ford Global Technologies Inc.
Sim & Mcburney
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