公开(公告)号：WO2020190475A1

公开(公告)日：2020-09-24

申请号：PCT/US2020/020253

申请日：2020-02-28

Applicant: CATERPILLAR INC.

Inventor： CHENOWETH, Kurtis ,  PAN, Jianping ,  DAOUD, Mohamed ,  VELU, Srinivasa, Perumal ,  JUJARE, Arvind ,  BUI, Y. T.

IPC: F01N3/20 ,  F01N3/28

Abstract: A selective catalytic reduction (SCR) system is disclosed. The SCR system may include a mixing tube with a mixing tube inlet; a diesel exhaust fluid (DEF) injector proximate to the mixing tube inlet; and a flow control device proximate to the mixing tube inlet, wherein the flow control device is positioned within the mixing tube or affixed to the mixing tube inlet, and wherein the flow control device includes a plurality of vanes arranged around a center of the flow control device.

公开(公告)号：WO2020190447A1

公开(公告)日：2020-09-24

申请号：PCT/US2020/019190

申请日：2020-02-21

Applicant: CATERPILLAR INC.

Inventor： CHENOWETH, Kurtis ,  PAN, Jianping ,  DAOUD, Mohamed ,  BUI, Y. T. ,  HUDGENS, Jason ,  AGUIRRE, Ian

IPC: F01N3/20 ,  F01N3/28 ,  F01N13/00 ,  F01N13/08

Abstract: An exhaust gas aftertreatment system is disclosed. The system may include an inlet to receive an exhaust gas produced by an engine and a first section to receive the exhaust gas from the inlet. The system may include a mixing tube to receive the exhaust gas from the first section and a reductant injector to inject a reductant into the mixing tube. The system may include a second section to receive the exhaust gas from the mixing tube and to facilitate mixing of the reductant and the exhaust gas after the exhaust gas exits the mixing tube and a diffuser to receive the exhaust gas from the second section. The system may include a plurality of catalysts to receive the exhaust gas from the diffuser and at least one outlet to receive the exhaust gas from the plurality of catalysts.