Invention Grant
US08640447B2 Exhaust emission control device for internal combustion engine 有权
内燃机废气排放控制装置

Exhaust emission control device for internal combustion engine
Abstract:
An exhaust emission control device includes a catalytic converter arranged in an exhaust passage of the internal combustion engine. The catalytic converter includes an upstream catalytic converter and a downstream catalytic converter arranged on a downstream side of the upstream catalytic converter. The upstream catalytic converter includes a first support and a first catalyst supported on the first support. The first catalyst includes a first lower layer catalyst and a first upper layer catalyst. Pd in the first lower layer catalyst is supported only on the oxygen storage component contained in the first catalyst. The first upper layer catalyst is provided on the first lower layer catalyst, Pd in the first upper layer catalyst being supported on each of the oxygen storage component and Al2O3 contained in the first catalyst.
Public/Granted literature
Information query
Patent Agency Ranking
0/0