The exhaust gas purifying system (1) for the internal combustion engine, comprising the first exhaust gas purifying device (31) provided with the NOx occlusion reduction type catalyst arranged in the exhaust gas passage (30) of the internal combustion engine (10), and also comprising the respective oxygen...http://www.google.fr/patents/US20040154285?utm_source=gb-gplus-shareBrevet US20040154285 - Exhaust gas purifying system for internal combustion engine
Exhaust gas purifying system for internal combustion engine
