Cummins Inc.

Feng Liu

Mert Geveci

Andrew W Osburn

Vivek Anand Sujan

Kenneth M Follen

Michael Haas

Arun Prakash Thunga Gopal

Archit N Koti

Pinak Jayant Tulpule

Apurva Arvind Chunodkar

A vehicle comprises an aftertreatment system configured to reduce constituents of an exhaust gas. The vehicle also includes a controller configured to determine a predicted load on the vehicle during a route, and adjust at least one of a temperature of the aftertreatment system or an amount of a reductant inserted into the aftertreatment system based on the predicted load.

Systems and methods for managing aftertreatment systems

A system includes an internal combustion engine providing exhaust gases to an exhaust conduit, an aftertreatment system having an SCR catalyst component and disposed in the exhaust conduit. The system further includes a first NHsensing element preferentially sensitive to NHand a second NHsensing element preferentially sensitive to NOin the exhaust conduit. Both NHsensing elements are positioned downstream of the SCR catalyst component. The system includes a controller having a test conditions module that determines whether an NOconcentration downstream of the SCR catalyst component is below a threshold value, an NHdiagnostic module that provides a detection comparison value in response to the NOconcentration, a first signal from the first NHsensing element, and a second signal from the second NHsensing element. The controller includes a sensor condition module that provides an NHsensor condition value in response to the detection comparison value.

Method and algorithm for diagnosing an NH3 sensor in an SCR system using measurements from two channels of the sensor

An example method includes interpreting an NHcomposition value at a position upstream of a selective reduction catalyst (SCR) element fluidly disposed in the exhaust conduit of an engine, interpreting a NOcomposition value at a position downstream of the SCR element, and determining an NHsensor rationality threshold in response to the upstream NHcomposition value. The method further includes determining an NHsensor health value as indicating a sensor failure in response to the downstream NOcomposition value exceeding the NHsensor rationality threshold.

Method and algorithm for performing an NH3 sensor rationality diagnostic

One illustrative embodiment is a method comprising operating an engine and an aftertreatment system by controlling a plurality of charge constituents provided the engine, iteratively perturbating one or more combustion inputs effective to vary operation of the engine, and determining fuel consumption and emissions information at the operating points effective to seek a weighted optimization of multiple parameters including fuel consumption and reductant consumption while also meeting a predetermined NOx emissions criterion. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the description and figures.

Controls for performance optimization of internal combustion engine systems

A system and method are disclosed for a selective catalytic reductant (SCR) catalyst with an NHsensor operationally coupled mid-catalyst of the SCR catalyst and a controller in electronic communication with the NHsensor configured to interpret a diagnostic enablement condition of the NHsensor. The controller is configured to control a reductant injector to inject varying reductant amounts over a range of ANR values in response to the enablement condition being satisfied. The controller also is configured to determine a lower bound of estimates of the NHamount at the mid-bed catalyst position for the reductant amounts, and determine an NHsensor fault condition in response to actual sensor outputs and the NHlower bound value.

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Greenwood, IN, United States of America

Feng Liu