Gm Global Technolgoy Operations, Inc.

Robert J Sutschek

Janean Kowalkowski

Steven J Andrasko

Igor Anilovich

Yun Xiao

John Coppola

Christopher J Kalebjian

Thomas L Bahensky

Jeffrey F Loo

A dosing control system for an exhaust system includes: a reductant fluid tank operable to contain a reductant solution comprising urea; an injector disposed in operable communication between a reductant tank and an SCR apparatus, the injector being operable to inject the reductant solution from the reductant tank into a flow of exhaust upstream of the SCR apparatus; a urea quality sensor (UQS) configured and disposed to sense a concentration of the urea in the reductant solution; and, a control module disposed in signal communication with the UQS and in operable communication with the injector, the control module being operable to adjust a dosing of the reductant solution injected by the injector based on a concentration of the urea in the reductant solution.

Exhaust fluid dosing control system and method

An exhaust gas treatment system for an internal combustion engine is provided having an exhaust gas conduit, a diesel exhaust fluid ('DEF') source, a selective catalytic reduction ('SCR') device, a NOsensor, and a control module. The DEF source supplies a DEF having a quality factor. The NOsensor is in fluid communication with the exhaust gas conduit. The NOsensor is located downstream of the SCR device and is configured for detecting a NOconcentration value. The control module is in communication with the DEF source and the NOsensor. The control module stores a diagnostic adaptation factor and an expected NOvalue. The control module includes a dosing module for determining a controls adaptation factor that is based on a deviation between the NOconcentration value and the expected NOvalue. The diagnostic adaptation factor is selectively updated with the controls adaptation factor.

System for indicating quality of a diesel exhaust fluid ('DEF')

An engine control module includes a power module and a turbine temperature module. The power module controls engine power output based on a turbine temperature. The turbine temperature module determines the turbine temperature based on a turbine inlet temperature. The power module decreases the engine power output when the turbine temperature is greater than or equal to a predetermined threshold temperature.

Thermal-protection based engine performance enhancement

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South Lyon, MI, United States of America

Robert J Sutschek