An exhaust gas purifying apparatus of an internal combustion engine is provided which includes: exhaust gas purifying means, provided in an exhaust passage of the engine, for adsorbing NOx in an exhaust gas when the air-fuel ratio of the exhaust gas is lean. The exhaust gas apparatus releases or reduces...http://www.google.fr/patents/US7127883?utm_source=gb-gplus-shareBrevet US7127883 - Exhaust gas purifying apparatus of internal combustion engine
Exhaust gas purifying apparatus of internal combustion engine
