公开(公告)号：US20180321138A1

公开(公告)日：2018-11-08

申请号：US15973155

申请日：2018-05-07

Applicant: Cummins Inc.

Inventor： Shu Li ,  Alok A. Joshi ,  Matthew L. Schneider ,  John P. Coates

IPC: G01N21/25 ,  G01N21/27 ,  G01N21/15 ,  G01M15/10

CPC classification number: G01N21/255 ,  G01M15/108 ,  G01N21/15 ,  G01N21/27 ,  G01N2201/0636 ,  G01N2201/0873

Abstract: An exhaust gas detection assembly, comprising a sensing system comprising a wide-band light source and a detector, a probe configured for mounting in a port of a component of an engine exhaust system, and a fiber optic bundle connected between the sensing system and the probe to carry source light from the light source to the probe and reflected light from the probe to the detector, wherein the detector comprises a filter that passes reflected light received from the probe in a wavelength range corresponding to a wavelength range affected by the presence of a type of gas molecules in the probe.