| 摘要 |
Unit for reduction of exhaust gases for IC engine, comprising cylindrical housing having gas inlet opening, gas outlet opening and injector for reducing substance; helicoid coaxially arranged inside the housing; channel aimed at conveying the exhaust gases and having substantially quadrangular cross-section, said channel helicoidally developing inside the unit; wherein the helix generated by the intersection between the inner surface of the housing and the helicoid has an inclination angle relative to the planes perpendicular to the generatrices of the cylindrical housing ranging from 0° to 30°, the unit comprising a coaxial sleeve for stiffening and stabilization, located at the center of the helicoid, passing axially throughout the helicoid, axially extending over a length at least equal to the axial length of the helicoid, said sleeve cooperating with the inner surface of the housing and the opposite surfaces of the helicoid in order to define the helicoidal channel. |
