| 摘要 |
Electricity is suppressed from flowing through a case (5) of an electrically heated catalyst (1). For this purpose, the case (5) for accommodating a heat generating element (3) includes a tubular portion (53) which is formed in parallel to a central axis, an inlet portion (51) which is provided on the upstream side from the tubular portion (53) and which has an inner diameter smaller than that of the tubular portion (53), an inclined portion (52) which connects the tubular portion (53) and the inlet portion (51), and an introducing portion (54) which extends from a connected portion between the inlet portion (51) and the inclined portion (52) toward inside of the case (5) and which is curved so that a center of curvature is positioned at the outside; and an inner tube (4) interposed by a mat (6) for supporting the heat generating element (3) includes a tubular portion (42) which is formed in parallel to a central axis, and an inclined portion (41) which is provided on the upstream side from the tubular portion (42), which has inner diameters that are decreased on the more upstream side, and which is curved. |
