Saddle-riding type vehicle

A saddle-riding type vehicle (100) according to the present invention includes: an internal combustion engine (1) causing combustion at an air/fuel ratio smaller than a stoichiometric air/fuel ratio, a first catalyst (2A) provided in an exhaust path to which combustion gas is discharged from the int...

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Bibliographic Details
Main Authors ITOU, YUTAKA, MOROZUMI, NAOHIRO
Format Patent
LanguageEnglish
French
German
Published 10.11.2010
Subjects
BLASTING
ENGINE PLANTS IN GENERAL
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
STEAM ENGINES
TRANSPORTING
WEAPONS
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Summary:A saddle-riding type vehicle (100) according to the present invention includes: an internal combustion engine (1) causing combustion at an air/fuel ratio smaller than a stoichiometric air/fuel ratio, a first catalyst (2A) provided in an exhaust path to which combustion gas is discharged from the internal combustion engine (1); a second catalyst (2B) which is provided in the exhaust path downstream with respect to the first catalyst (2A); and a secondary air introduction device (3A) for introducing secondary air to a portion of the exhaust path, the portion (7a') being between the first catalyst (2A) and the second catalyst (2B). The first catalyst (2A) and the second catalyst (2B) each contain a precious metal component containing at least one of Pt, Rh, Pd, and Au. The first catalyst (2A) further contains a zeolite carrier and Co or Fe being carried on the zeolite carrier in an amount which is greater than an ion-exchangeable amount thereof.
Bibliography:Application Number: EP20090176627