| 摘要 |
The present invention is intended to suppress a decrease in insulation resistance between electrodes and a case in an electrically heated catalyst (EHC). The EHC (1) according to the present invention is provided with a heat generation element (3) that is electrically energized to generate heat thereby to heat a catalyst, a case (4) that receives a heat generation element therein, an insulating member (5) that is arranged between the heat generation element (3) and the case (4) for insulating electricity, electrodes (7) that are connected to the heat generation element (3) through an electrode chamber (9) which is a space located between an inner wall surface of the case (4) and an outer peripheral surface of the heat generation element (3), and a communication passage (10) that makes communication between a portion of an exhaust system of the internal combustion engine, which is other than a portion thereof in which the electrically heated catalyst is arranged, and the electrode chamber. |
