Cummins Inc.

Wole C Akinyemi

Samuel C Geckler

Yue Wang

Michael J Cunningham

Paul R Miller

Yue Yun Wang

Bradlee J Stroia

Lyle E Kocher

One embodiment is a system including a controller operable to control fuel injection events. The system is operable in a base mode, and at least one of a deNOx mode, a deSOx mode, and a deSoot mode. The base mode includes a pilot injection pulse, a main injection pulse, a post injection pulse, and a second post injection pulse. The deNOx mode includes a pilot injection pulse, a main injection pulse, and a post injection pulse. The deSOx mode includes a pilot injection pulse, a main injection pulse, a post injection pulse, a second post injection pulse, and a third post injection pulse. The deSoot mode includes a pilot injection pulse, a main injection pulse, a post injection pulse, a second post injection pulse, and a third post injection pulse. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.

Flexible fuel injection for multiple modes of diesel engine exhaust aftertreatment

One embodiment is a method including maintaining a count based upon an engine operating condition, determining a soot level based upon a characteristic of a diesel particulate filter, and requesting deSoot based upon the count meeting or exceeding a threshold, or the soot level meeting or exceeding a threshold, or both. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.

Soot filter regeneration software, methods and systems

A system and method for controlling soot regeneration in a catalyst soot filter ('CSF') of an exhaust system for a diesel engine by measuring the inlet temperature of a diesel oxidation catalyst ('DOC') coupled to the CSF, determining a target light off temperature for the DOC, injecting a first fuel amount into a cylinder of the engine to cause the DOC inlet temperature to approach the target light off temperature, measuring the CSF inlet temperature and pressure across the CSF, determining a target CSF inlet temperature for regeneration, injecting a second fuel amount for combustion in the DOC to cause the CSF inlet temperature to approach the target CSF inlet temperature.

Method and apparatus for soot filter catalyst temperature control with oxygen flow constraint

Growing community of inventors

Columbus, IN, United States of America

Wole C Akinyemi