Cummins Inc.

Lk Hwang

Neal W Currier

Timothy R Frazier

Linsong Guo

Ryan Edgecomb

Robert Kern

A system is described for producing an elevated exhaust temperature and reduced NOoutput for an engine. The system includes an internal combustion engine having a common rail fuel system, an exhaust pressure modulation device for the internal combustion engine, and a controller structured to functionally execute operations for elevating the exhaust temperature and reducing the NOoutput. The controller determines a desired engine outlet exhaust temperature, an engine speed, and an engine load. In response to the desired engine outlet exhaust gas temperature, the engine speed, and the engine load, the controller determines an exhaust pressure increase command and a fuel injection command including at least one post-injection event. The common rail fuel system is responsive to the fuel injection command, and the exhaust pressure modulation device is responsive to the exhaust pressure increase command.

Techniques for optimizing engine operations during aftertreatment regeneration

A system is provided for enhancing aftertreatment regeneration capability. The system includes an internal combustion engine producing an exhaust gas stream and an aftertreatment component that treats the exhaust gas stream, where the aftertreatment component includes a desired inlet exhaust gas temperature. The system includes an exhaust gas pressure device that modulates an exhaust pressure value, and a fuel injection system that provides a post-injection event. The system includes a controller that provides an exhaust pressure command and a fuel injection command in response to determining that a temperature of the exhaust gas stream is lower than the desired inlet exhaust gas temperature. The exhaust gas pressure device is responsive to the exhaust pressure command and the fuel injection system is responsive to the fuel injection command.

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Columbus, IN, United States of America

Lk Hwang