Gm Global Technolgoy Operations, Inc.

Ivan Flaminio Cozza

Claudio Ciaravino

Andrea Arnone

An exhaust gas flow after-treatment (AT) system includes first and second AT devices. The first AT device includes cone with an inlet defined by a surface area having a first geometric center and an outlet defined by a surface area having a second geometric center. The AT system also includes an exhaust passage for carrying the exhaust gas flow from the first AT device cone outlet to the second AT device, and includes an injector for introducing a reductant into the exhaust gas flow within the exhaust passage. The first geometric center is arranged at a predetermined distance from the second geometric center and the inlet surface area is greater than the outlet surface area by a predetermined ratio. The predetermined distance and the predetermined ratio are together configured to induce swirl in and mix the reductant with the exhaust gas flow within the exhaust passage.

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Turin, Italy

Ivan Flaminio Cozza