BigPatents India

To provide an exhaust emission control device for an engine, in which a cylindrical catalyst case for holding a catalyst support is disposed in a casing including a taper portion having a small-diameter end connected to a connection pipe connected to an exhaust pipe for introducing an exhaust gas from an engine and a cylindrical portion connected to a large-diameter end of the taper portion; the catalyst case is supported by the cylindrical portion via a supporting member; the catalyst support has a circular outer surface having a diameter larger than the outside diameter of the connection pipe; and the upstream end of the catalyst support is opposed to the downstream end of the connection pipe, characterized in that the device is capable of raising the temperature of a catalyst at an early stage while avoiding a reduction in output torque of the engine in a low speed rotational range of the engine, and also preventing deterioration of the ventilation resistance of a catalyst support upon high load operation of the engine, and is also capable of supporting a catalyst case by a cylindrical portion of a casing while preventing a catalyst from being affected by an external temperature. Drawing: 5 Sheets. Total Pages: 41 Fig. 3 & 5