Cummins Inc.

Cummins Ip, Inc.

Joan M Wills

Phanindra V Garimella

John N Chi

Travis Alva Anderson

Paul Daniel Borisuk

J Steve Wills

Rajkumar Subramanian

Vaibhav Daramwar

Pagalavan Mathari Bakthavatsalam

Aleksey Yezerets

Neal W Currier

Abdul R Ofoli

Timothy R Frazier

Patrick J Shook

Weiwen Wang

Lisa Farrell

Joe V Hill

Michael J Cunningham

Andrew W Osburn

Michael J Ruth

Thomas Dollmeyer

Ross C Berryhill

Sriram Satya Srinivas Popuri

Andy Osburn

Yue-Yun Wang

Thomas M Yonushonis

Samuel C Geckler

Michael Haas

J Stephen Wills

Yue Yun Wang

Lyle E Kocher

Hasan Mohammed

Zheng Liu

Dean H Dringenburg

Brian P Liimatta

Jer-Sheng J Chen

Thanigasalam Chettiyar

Pranati Yadav

Daniel R Hashbarger

A method includes: receiving an inlet temperature of a selective catalytic reduction system; comparing the inlet temperature to a temperature setpoint; and adjusting at least one of a first exhaust manifold pressure setpoint for a first cylinder bank of an engine or a second exhaust manifold pressure setpoint for a second cylinder bank of the engine, based on the comparison.

Increase aftertreatment temperature during light load operation

A method includes: determining that at least one cylinder of a first cylinder bank of an engine is active; determining that at least one cylinder of a second cylinder bank of the engine is inactive; receiving an inlet temperature of a selective catalytic reduction system; comparing the inlet temperature to a temperature setpoint; and adjusting at least one of a first exhaust manifold pressure setpoint for the first cylinder bank or a second exhaust manifold pressure setpoint for the second cylinder bank based on the comparison.

Systems, methods, and apparatuses are provided for increasing exhaust gas temperature. A system includes a valve and a controller coupled to the valve. The controller is structured to determine that a plurality of cylinders of an engine are active; compare an exhaust aftertreatment temperature to an exhaust aftertreatment temperature setpoint; and in response to the comparison, adjust an effective flow area for exhaust gas from the plurality of cylinders of the engine to increase an exhaust gas temperature.

Various embodiments disclosed herein relate to the access, management, and targeted display of one or more asset display profiles to a person of interest (e.g., an associated asset creator, a customer, etc.). A method includes interpreting an asset display profile corresponding to a creative asset description and an associated asset creator; determining an asset display context; and in response to the asset display profile and the asset display context, providing an asset display description to an output device.

System, method, and apparatus for individual innovator marketing and recognition

Systems, methods, and apparatuses are provided for increasing exhaust gas temperature. A system includes a valve and a controller coupled to the valve. The controller is structured to determine that an exhaust manifold pressure does not meet an exhaust manifold pressure setpoint and in response, cause an adjustment of an effective flow area of exhaust gas from an engine. The adjustment of the effective flow area is structured to increase an exhaust gas temperature.

A method for increasing the exhaust temperature of an exhaust system. The method includes receiving an inlet temperature of a selective catalytic reduction system; determining whether the inlet temperature meets a temperature setpoint; adjusting an exhaust manifold pressure setpoint based on the determination of the inlet temperature; determining whether the exhaust manifold pressure of at least one of first or second bank meet the exhaust manifold pressure setpoint; and causing an adjustment of an effective flow area of at least one of the first bank or second bank based on the exhaust manifold pressure, the adjustment of the effective flow area structured to increase exhaust temperature during light load operation.

A system includes an internal combustion engine producing an exhaust stream, a particulate filtering device that treats the exhaust stream, a particulate sensor operatively coupled to the exhaust stream at a position downstream of the particulate filtering device, and a temperature sensor operatively coupled to the exhaust stream. The system includes a controller that interprets a particulate sensor particulate stability condition, interprets a particulate sensor input value and a particulate sensor temperature, compensates the particulate sensor input value in response to the particulate sensor temperature, and filters the compensated particulate sensor input value. The controller determines a soot accumulation value in response to the filtered compensated particulate sensor input value, interprets a diagnostic enable condition, and determines a particulate filter diagnostic value in response to the active diagnostic enable condition and the soot accumulation value. The controller provides the particulate filter diagnostic value to an output device.

Particulate filter diagnostics

One embodiment is a method including operating an SCR system at a plurality of commanded ammonia to NOx input ratios, providing a plurality of data indicating NOx output from the SCR system for the plurality of commanded ammonia to NOx input ratios, and evaluating the plurality of data to diagnose the SCR system. Additional embodiment are methods, systems, and apparatuses including SCR diagnostics. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.

Methods, systems, and apparatuses of SCR diagnostics

Various embodiments of an apparatus, system, and method are disclosed for controlling NOconversion in a selective catalytic reduction (SCR) system. According to one representative embodiment, an apparatus includes a duty cycle factor module and a NOconversion mode selection module. The duty cycle factor module is configured to determine a duty cycle factor of an internal combustion engine where the duty cycle factor represents predicted driving conditions of a vehicle in which the internal combustion engine is housed. The NOconversion mode selection module is configured to command NOconversion in the SCR system according to a first NOconversion mode if the duty cycle factor is within a duty cycle factor range and according to a second NOconversion mode if the duty cycle factor is not within the duty cycle factor range.

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According to one representative embodiment, an apparatus for reducing NOemissions in an engine exhaust gas stream of an engine system having a selective catalytic reduction (SCR) system with an SCR catalyst positioned downstream of a reductant injector includes a NOreduction target module and a reductant module. The NOreduction target module is configured to determine a NOreduction requirement, which includes an amount of NOin the exhaust gas stream to be reduced on the SCR catalyst. The reductant module is configured to determine the amount of reductant added to the exhaust gas stream to achieve the NOreduction requirement. The amount of reductant added to the exhaust gas stream is a function of at least one ammonia storage characteristic of the SCR catalyst, at least one reductant-to-ammonia conversion characteristic, and a conversion capability of an AMOX catalyst in exhaust receiving communication with the SCR catalyst.

According to one exemplary embodiment, an apparatus is disclosed for estimating an NOconversion efficiency of an SCR catalyst. The apparatus includes a catalyst degradation module for determining an SCR catalyst degradation factor and a NOconcentration module for determining an SCR catalyst inlet NOconcentration based on an interpretation of at least one NOdetector signal. Additionally, the apparatus includes an NHconcentration module for determining an SCR catalyst inlet NHconcentration, a temperature module for determining an SCR catalyst bed temperature of the at least one SCR catalyst, and a space velocity (SV) module for determining an exhaust gas SV for the SCR catalyst. A NOconversion efficiency module calculates a NOconversion efficiency value based at least partially on the SCR catalyst degradation factor, the SCR catalyst inlet NOconcentration, the SCR catalyst inlet NHconcentration, the exhaust gas SV, and the SCR catalyst bed temperature.

Apparatus, system, and method for estimating an NOx conversion efficiency of a selective catalytic reduction catalyst

Various embodiments of an apparatus, system, and method are disclosed for reducing NOemissions using ammonia storage on an SCR catalyst. For example, according to one representative embodiment, an apparatus for reducing NOemissions in an engine exhaust includes a NOreduction target module that is configured to determine a NOreduction requirement. The apparatus also includes an ammonia storage module that is configured to determine an ammonia storage modifier. An ammonia target module of the apparatus is configured to determine an ammonia addition requirement. The ammonia target module is communicable in data receiving communication with the ammonia storage module to receive the ammonia storage modifier, which is added to the ammonia addition requirement. The apparatus also includes a reductant target module that is configured to determine a reductant injection requirement that includes an amount of reductant added to the exhaust gas stream to achieve the ammonia addition requirement.

Various embodiments of an apparatus, system, and method are disclosed for reducing NOemissions on an SCR catalyst. For example, according to one representative embodiment, an apparatus for reducing NOemissions in an engine exhaust includes a NOreduction target module that is configured to determine a NOreduction requirement that includes an amount of NOin the exhaust gas stream to be reduced on a selective catalytic reduction (SCR) catalyst. The apparatus also includes an ammonia target module that is configured to determine an ammonia addition requirement that includes an amount of ammonia added to the exhaust gas stream to achieve the NOreduction requirement. The apparatus also includes a reductant target module that is configured to determine a reductant injection requirement that includes an amount of reductant added to the exhaust gas stream to achieve the ammonia addition requirement. The apparatus further includes a reductant limiting module that is configured to determine whether at least one reductant limiting condition is met and to limit the amount of reductant added in response to the at least one reductant limiting condition if the at least one reductant limiting condition has been met.

According to one representative embodiment, an apparatus for determining the degradation of a selective catalytic reduction (SCR) catalyst of an engine exhaust aftertreatment system includes a system properties module configured to store at least one system dynamics property value of the exhaust system at a first time and receive the at least one system dynamics property value of the exhaust aftertreatment system at a second time subsequent to the first time. The apparatus also includes a system dynamics module configured to determine a storage capacity of the SCR catalyst based on a comparison between the at least one system dynamic property value at the first time and the at least one system dynamic property value at the second time. Additionally, the apparatus includes an SCR catalyst degradation factor module configured to determine an SCR catalyst degradation factor based at least partially on the storage capacity of the SCR catalyst.

Apparatus, system, and method for determining the degradation of an SCR catalyst

Various embodiments of an apparatus, system, and method are disclosed for reducing NOemissions on an SCR catalyst. For example, according to one representative embodiment, an apparatus for reducing NOemissions in an engine exhaust includes a NOreduction target module that is configured to determine a NOreduction requirement that includes an amount of NOin the exhaust gas stream to be reduced on a selective catalytic reduction (SCR) catalyst. The apparatus also includes an ammonia target module that is configured to determine an ammonia addition requirement that includes an amount of ammonia added to the exhaust gas stream to achieve the NOreduction requirement. The apparatus also includes a reductant target module that is configured to determine a reductant injection requirement that includes an amount of reductant added to the exhaust gas stream to achieve the ammonia addition requirement. The apparatus further includes a reductant limiting module that is configured to determine at least one reductant limiting condition and to limit the amount of reductant added in response to the reductant limiting condition.

Growing community of inventors

Nashville, IN, United States of America

Joan M Wills