Invention Grant
- Patent Title: Exhaust emission control device for internal combustion engine
- Patent Title (中): 内燃机废气排放控制装置
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Application No.: US13397678Application Date: 2012-02-16
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Publication No.: US08640447B2Publication Date: 2014-02-04
- Inventor: Tomohiro Nishi , Kei Kuroki , Norihiko Suzuki , Kenji Katayama
- Applicant: Tomohiro Nishi , Kei Kuroki , Norihiko Suzuki , Kenji Katayama
- Applicant Address: JP Tokyo
- Assignee: Honda Motor Co., Ltd.
- Current Assignee: Honda Motor Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Ditthavong Mori & Steiner, P.C.
- Priority: JP2011-040266 20110225
- Main IPC: F01N3/00
- IPC: F01N3/00 ; F01N3/02 ; F01N3/20

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
- US20120216512A1 EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE Public/Granted day:2012-08-30
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