公开(公告)号：US20200300146A1

公开(公告)日：2020-09-24

申请号：US16359885

申请日：2019-03-20

Applicant: Caterpillar Inc.

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

IPC: F01N3/28 ,  B01F11/00 ,  F01N3/20

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：US20200300137A1

公开(公告)日：2020-09-24

申请号：US16359726

申请日：2019-03-20

Applicant: Caterpillar Inc.

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

IPC: F01N3/00 ,  F01N3/10 ,  F01N3/28

Abstract: An aftertreatment module is disclosed. The aftertreatment module may include a housing and a mounting plate within the housing that forms an inlet chamber and an outlet chamber. The aftertreatment module may include an inlet for exhaust gas from a combustion engine to flow into the inlet chamber and an outlet through a top plate of the housing for the exhaust gas to flow from the outlet chamber, wherein the outlet comprises a plurality of perforations. The aftertreatment module may include an outlet sensor mounted on the outlet to obtain information relating to the exhaust gas as the exhaust gas flows from the outlet chamber and a set of catalysts mounted to the mounting plate to treat the exhaust gas as the exhaust gas flows from the inlet chamber to the outlet chamber. The aftertreatment module may include a drain port through a side plate of the housing.

公开(公告)号：US20200300145A1

公开(公告)日：2020-09-24

申请号：US16359678

申请日：2019-03-20

Applicant: Caterpillar Inc.

Inventor： Kurtis CHENOWETH ,  Mohamed DAOUD

IPC: F01N3/28 ,  F01N13/08 ,  F01N11/00 ,  F01N3/20 ,  B01D53/94

Abstract: An aftertreatment module is disclosed. The aftertreatment module may include a housing. The aftertreatment module may include a mounting plate within the housing that forms an inlet chamber and an outlet chamber. The aftertreatment module may include an inlet for exhaust gas from a combustion engine to flow into to the inlet chamber. The aftertreatment module may include an outlet through a top plate of the housing. The inlet and the outlet may be located on opposite sides of the housing and at opposite ends of the housing from each other. The aftertreatment module may include a set of catalysts mounted to the mounting plate. The aftertreatment module may include a diffuser plate within the inlet chamber that forms a lower portion of the inlet chamber and an upper portion of the inlet chamber. The diffuser plate may diffuse the exhaust gas through the lower portion.

公开(公告)号：US20200300143A1

公开(公告)日：2020-09-24

申请号：US16359882

申请日：2019-03-20

Applicant: Caterpillar Inc.

Inventor： Kurtis CHENOWETH ,  Jason HUDGENS ,  Xiaohui GONG ,  Shivsinh PARMAR

IPC: F01N3/20 ,  F01N3/28

Abstract: A diesel exhaust fluid (DEF) system and a method of controlling the DEF system are disclosed. The method may include determining that a shutdown condition of the DEF system is satisfied; providing a control signal to open a valve of a buffer tank of the DEF system based on determining that the shutdown condition of the DEF system is satisfied; determining that a level of DEF remaining in the buffer tank satisfies a threshold; and closing the valve of the buffer tank based on the level of DEF remaining in the buffer tank satisfying the threshold.