Cummins Inc.

Frederick H Lindner

John M Janssen

Jacob Y Wong

Matthew L Schneider

Tim Frazier

Eric Andrews

A method includes providing an exhaust stream for an internal combustion engine, where the exhaust stream is fluidly coupled to an aftertreatment component. The method includes optically determining an amount of an exhaust gas constituent in the exhaust stream. The method further includes modifying a model stored on a computer readable medium in response to the amount of the exhaust gas constituent. The model is an engine NOgeneration model, a catalyst NOstorage model, a catalyst NOconversion model, a catalyst NO to NOconversion model, a catalyst conversion efficiency model, an engine soot generation model, and/or a urea hydrolysis model.

Apparatus, system, and method for aftertreatment control and diagnostics

A system for detecting engine fluid constituents includes an engine having a sample channel having a conduit for a working engine fluid. The system includes an electromagnetic (EM) source that emits EM radiation through a first metal tube, where the EM radiation is EM energy at a wavelength of interest. The system further includes an EM detector that receives a remainder radiation through a second metal tube, the remainder radiation including the remaining EM radiation after passing through the sample channel. The system includes a controller that determines a composition indicator signal representative of an amount of a constituent in the working engine fluid in response to a strength of the remainder radiation, and determines a concentration of a component of interest according to the composition indicator signal.

Apparatus, system, and method for detecting engine fluid constituents

A system capable of flowing gases including combustion byproducts past an exposed face of an optical element in an engine fluid conduit, and depositing debris on the exposed face of the optical element. The debris may be soot, unburned hydrocarbons, sulfates, and/or a reductant precipitate. The system is further capable of passing electromagnetic (EM) radiation through the optical element and the flowing gases and interrogating the EM radiation after passing through the optical element and the flowing gases to determine an amount of debris accumulated on the exposed face of the optical element. The system is further capable of heating an electric heating element thermally coupled to the optical element sufficiently to remove accumulated debris from the exposed face in response to the amount of debris exceeding a threshold.

Optical sensing in an adverse environment

The present invention provides an internal combustion engine system that includes an internal combustion engine system includes an internal combustion engine having an intake manifold fluidly coupled to a compressor adapted to receive ambient air through an air conduit of the engine, a first sensor positioned at least one of inside and outside the air conduit and configured to measure a first water content in the ambient air, and a second sensor positioned at least one of inside the intake manifold and upstream of the intake manifold and configured to measure a second water content in the intake manifold.

Closed loop EGR control method and system using water content measurement

An apparatus, system, and method are disclosed for minimizing NOin exhaust gasses. The apparatus includes an ionization module configured to at least partially ionize an exhaust gas of an engine. A characterization module is configured to identify NOions present in the ionized exhaust gas, and an engine control module is configured to communicate with the characterization module and modify engine parameters in response to identified NOlevels. The system includes an internal combustion engine having an intake manifold configured to deliver an air-fuel mixture to at least one combustion chamber, an exhaust manifold configured to receive exhaust gasses from the combustion chamber, and the apparatus. The method includes controlling an ionization module configured to at least partially ionize an exhaust gas of an engine, identifying NOions present in the ionized exhaust gas, and modifying one or more selected engine parameters in response to identified NOlevels.

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Aesch, Switzerland

Frederick H Lindner