Patent ID: 7048895

Claim:
An exhaust gas purifying apparatus comprising an exhaust pipe for forming an exhaust way communicated with an exhaust port of an engine, and a catalyst disposed in said exhaust way for purifying an exhaust gas; the improvement comprising: said exhaust way of said exhaust pipe having a first mounting position and a second mounting position disposed at the downstream side with respect to said first mounting position; and said catalyst having a first honeycomb catalyst portion placed at said first mounting position of said exhaust way and a second honeycomb catalyst portion placed at said second mounting position of said exhaust way, said first honeycomb catalyst portion having an outer circumferential surface for forming a blowing passage with an inwall surface of said exhaust pipe and including a metallic first carrier with a plurality of holes being along a length direction of said exhaust way of said exhaust pipe, said second honeycomb catalyst portion including a metallic second carrier with a plurality of holes being along a length direction of said exhaust way of said exhaust pipe; wherein the radial cross sectional area in a catalyst region of said first honeycomb catalyst portion is set in the 1/5–2/3 range with respect to the radial cross sectional area of a flowing way defined by said inwall surface of said first mounting position of said exhaust way with said first honeycomb catalyst portion being removed.