Ford Global Technolgoies, LLC

Dean Pennala

Frank M Korpics

Michiel Jacques Van Nieuwstadt

Brien Lloyd Fulton

David Robert Nader

Paul Martin Niessen

Jason Ronald Smith

David Curtis Ives

Gopal Krishna Chamarthi

Jeff Reich

Devesh Upadhyay

William Goodwin

Peter Mitchell Lyon

Timothy Webb

Jim Bromham

Justin Trzeciak

Hao Wu

Chris Riffle

David Wynn Philion

James Campbell

Brett Gayney

Methods and systems are provided for a NOsensor. In one example, a method includes heating a NOsensor during a vehicle off in response to a cumulative heat energy applied to the NO.

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Methods and systems for operating an engine that includes a controller and a NOx sensor are described. In one example, output of the NOx sensor is selectively made available to software modules within the controller when an offset in NOx sensor output is not expected. If the offset in NOx sensor output is expected, the NOx sensor output may not be made available to the software modules.

System and method for predicting validity of NOsensor output

A method for operating a turbocharged engine is disclosed. In one example, during a first condition an engine operation is adjusted in response to a turbocharger expansion ratio exceeding a first limit and during a second condition an engine operation is adjusted in response to the turbocharger expansion ratio exceeding a second limit that differs from the first limit. Degradation of the engine may be reduced under some engine operating conditions by adjusting engine operation in response to the turbocharger expansion ratio.

Method and system for limiting output of a boosted engine

Systems and methods for detecting ammonia slip in an exhaust system based upon transient NOx sensor responses are described. In one example method, an exhaust system allocates tailpipe NOx sensor output to NOx and NHlevels responsive to the transient sensors using a segment length method that processes the transient signals based on the total segment lengths calculated within a window. A ratio of segment lengths relative to a threshold is determined for a measured and expected NOx rate of change downstream of an SCR that is further used to determine a probability of NOx and NHbased on the measured sensor activities, and a controller is included to adjust one or more parameters based on the allocation and changes of sensor output.

Enhanced real-time ammonia slip detection

The systems and method described above in the present disclosure allow for regeneration of a diesel particulate filter while a vehicle is in stationary power take-off mode. Described is a method of: during select power take-off conditions, reducing an EGR rate responsive to an indication to regenerate a diesel particulate filter.

Diesel particulate filter passive regeneration during stationary power take-off

A method for controlling combustion in an engine is provided. The method comprises under a first condition, adjusting an EGR amount of a total cylinder charge in response to engine out NOx levels being below a first threshold. In this way, NOx levels may be used as feedback to control combustion stability.

NOx feedback for combustion control

A method for operating a turbocharged engine is disclosed. In one example, an engine operation is adjusted in response to a turbocharger expansion ratio. Degradation of the engine may be reduced under some engine operating conditions by adjusting engine operation in response to the turbocharger expansion ratio.

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Howell, MI, United States of America

Dean Pennala