公开(公告)号：US20170314443A1

公开(公告)日：2017-11-02

申请号：US15144386

申请日：2016-05-02

Applicant: Caterpillar Inc.

Inventor： Stefan Fejer Simon ,  Yong Yi

IPC: F01N3/28 ,  F01N3/20

CPC classification number: F01N3/2892 ,  B01F3/04049 ,  B01F5/0451 ,  B01F5/0618 ,  B01F2005/0628 ,  B01F2005/0638 ,  F01N3/2066 ,  F01N2610/02

Abstract: A swirl mixer for mixing a reducing agent with exhaust gas in a selective catalytic reduction (SCR) aftertreatment system is described. The swirl mixer may comprise a base permitting a flow of the reducing agent and the exhaust gas therethrough, and three arrays of fins projecting from the base in a direction of flow of the exhaust gas. The three arrays of fins may be arranged in a triangular configuration about a center of the mixer to induce a swirl motion to the reducing agent and the exhaust gas flowing through the mixer. The fins in each of the arrays may be oriented in a common direction that is rotated by about 60° from the common direction of the fins in an adjacent array.