Honda Motor Co., Ltd.
EXHAUST GAS PURIFICATION CATALYST

Abstract:

In an exhaust gas purifying catalyst according to the present invention, a substrate includes inflow-side cells, outflow-side cells, and porous partition walls, each partition wall separating the inflow-side cell from the outflow-side cell. Catalyst portions include: first catalyst portions, each first catalyst portion being provided on a surface of the partition wall that faces the inflow-side cell on an upstream side in an exhaust gas flow direction, and second catalyst portions, each second catalyst portion being provided on a surface of the partition wall that faces the outflow-side cell on a downstream side, and the exhaust gas purifying catalyst satisfies the following expressions: I.sub.B1/I.sub.A.times.100.gtoreq.60%, I.sub.B2/I.sub.A.times.100.gtoreq.60%, I.sub.C1/I.sub.A.times.100.gtoreq.3%, and I.sub.C2/I.sub.A.times.100.gtoreq.3%, where I.sub.A, I.sub.B1, I.sub.B2, I.sub.C1, and I.sub.C2 represent pore volumes, definitions of which can be found in the specification.