Patent ID: 7356986
Filing Date: 2008-04-15
Classification: F01N

Abstract:
1. An exhaust gas purification device comprising: first and second catalyst carriers interposed in an exhaust passage of an engine, which purify an exhaust gas; a case provided in the exhaust passage, which houses the first and second catalyst carriers in series in an exhaust gas flow direction; an annular carrier holder interposed between the first and second catalyst carriers, which holds the first and second catalyst carriers via a buffering member and has a first opening which connects an inner peripheral side and an outer peripheral side; a first sensor which detects a state of the exhaust gas flowing through the interior of the case; and a first sensor attachment portion provided in the case, which connects the interior and exterior of the case in an orientation that is substantially orthogonal to the exhaust gas flow direction, wherein the first sensor attachment portion is provided in a position corresponding to the first opening when the carrier holder is housed in the case, wherein the carrier holder comprises: a substantially C-shaped annular support member having a notch portion in a circumference thereof when seen from the exhaust gas flow direction; and a bridge which bridges the notch portion, and the bridge forms the first opening.