Cummins Emission Solutions Inc.

Cummins Inc.

Anand Srinivasan

John K Heichelbech

Aleksey Yezerets

Neal W Currier

Ashok Kumar

Di Wang

Saurabh Yashwant Joshi

Yadan Tang

Tyler A Rash

An aftertreatment system includes: a first exhaust gas path comprising a heater; a second exhaust gas path comprising a first decomposition chamber configured to receive reductant and a first selective catalytic reduction catalyst downstream of the first decomposition chamber; a combined exhaust gas path downstream of the first exhaust gas path and the second exhaust gas path, the combined exhaust gas path configured to receive exhaust gas from both the first exhaust gas path and the second exhaust gas path; a selector valve configured to divert the exhaust gas between the first exhaust gas path and the second exhaust gas path based on a temperature of the exhaust gas; and a controller programmed to control the selector valve.

Valve arrangement for split-flow close-coupled catalyst

An aftertreatment system includes a first exhaust gas path, a second exhaust gas path, and a selector valve configured to divert exhaust gas between the first exhaust gas path and the second exhaust gas path based on a temperature of the exhaust gas. The aftertreatment system also includes a controller programmed to control the selector valve such that the selector valve diverts at least a portion of the exhaust gas to the first exhaust gas path when the temperature of the exhaust gas is equal to or less than a predetermined temperature threshold and the selector valve diverts the exhaust gas to the second exhaust gas path when the temperature of the exhaust gas is greater than the predetermined temperature threshold. The first exhaust gas path includes a heater configured to heat the exhaust gas received in the first exhaust gas path.

A diagnostic system () is provided and includes a sensor () disposed downstream from an exhaust gas aftertreatment system. Also included in the diagnostic system () is a central diagnostic unit () configured to diagnose a condensation condition associated with the sensor () for mitigating a sensor failure due to water condensation on the sensor (), the central diagnostic unit () performing the diagnosis on the condensation condition based on water storage and release information related to a component of the exhaust gas aftertreatment system. The sensor () is activated based on the water storage and release information.

System and method to mitigate sensor failures due to water condensation

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Greenwood, IN, United States of America

Anand Srinivasan