| 摘要 |
<p>This electrically heated catalyst keeps electricity from flowing in the case (5) of the electrically heated catalyst (1). To that effect, the case (5), which houses a heating element (3), is provided with a tubular portion (53) formed parallel to a central axis, an entrance portion (51) provided further upstream than the tubular portion (53) and having an inner diameter smaller than that of the tubular portion (53), an inclined portion (52) which connects the tubular portion (53) and the entrance portion (51), and an introduction portion (54) which extends to inside the case (5) from where the entrance portion (51) and the inclined portion (52) connect and which is curved such that the center of curvature is positioned outside of the case (5). An inner cylinder (4), which is held from both sides by a mat (6) supporting the heating element (3), is provided with a cylindrical portion (42) formed parallel to the central axis, and an inclined portion (41) which is provided further upstream than the cylindrical portion (42), has an inner diameter that becomes smaller in the upstream direction and is curved.</p> |
