Patent ID: 8245503

Claim:
An exhaust emission control device comprising: a particulate filter incorporated in an exhaust pipe for capturing particulates in exhaust gas; a selective reduction catalyst downstream of said particulate filter and capable of reacting NOx with ammonia even in the presence of oxygen; and urea water as a reducing agent being adapted to be added between said selective reduction catalyst and said particulate filter, wherein said particulate filter and said selective reduction catalyst are arranged in parallel with each other as separate and distinct bodies, wherein a rear end of said particulate filter is connected to a front end of the selective reduction catalyst through an S-shaped communication passage such that, the exhaust gas from the rear end of the particulate filter is introduced into the front end of the adjacent selective reduction catalyst in a forward folded manner, wherein a straight intermediate portion of the communication passage extending linearly is arranged along an axis of the particulate filter and an axis of the selective reduction catalyst, the particulate filter and the selective reduction catalyst are configured to be pivotable about an axis of the straight intermediate portion to change mounted angles of the particulate filter and of the selective reduction catalyst about the straight portion, and wherein urea water addition means for addition of urea water are arranged midway of said communication passage.