Patent ID: 6729129
Filing Date: 2004-05-04
Classification: F01N,Y02T

Abstract:
An exhaust gas purifying system for purifying gas exhausted from an engine, comprising:a gas passage for the gas exhausted from the engine; a first three-way catalyst arranged on the gas passage; a first HC-trap-catalyst arranged downstream of the first three-way catalyst on the gas passage; a second HC-trap-catalyst arranged downstream of the first HC-trap-catalyst on the gas passage; and a heat capacitor arranged between the first HC-trap-catalyst and the second HC-trap-catalyst on the gas passage, wherein each of the heat capacitor and the second HC-trap-catalyst has a honeycomb carrier, and a ratio Gt/Gh2 of a geometric surface area Gt of the honeycomb carrier of the heat capacitor to a geometric surface area Gh2 of the honeycomb carrier of the second HC-trap-catalyst ranges from 1 to 5.