Cummins Emission Solutions Inc.

Matthew W Hormann

Nathan Charles Schattke

A system includes: an exhaust aftertreatment system that includes a particulate matter sensor that includes a heating element configured to selectively provide heat to the particulate matter sensor; and a controller programmed to: receive particulate matter data indicating a state of the particulate matter sensor; determine that the particulate matter sensor is in a full state based on the particulate matter data; and activate the heating element to: (i) a first temperature for a first period of time, the first temperature being sufficient to burn off water or ammonia; (ii) a second temperature for a second period of time immediately after the first period of time, the second temperature being greater than the first temperature and being sufficient to burn off urea, biuret, or melamine; and (iii) a third temperature for a third period of time immediately after the second period of time, the third temperature being greater than the second temperature and being sufficient to burn off carbon.

System and method of sensor reconditioning in an exhaust aftertreatment system

The present disclosure relates to a system, apparatus, and method for reconditioning a particulate matter sensor in an exhaust aftertreatment system that will resist poisoning. The system and method includes receiving particulate matter data indicating a state of the particulate matter sensor; determining that the particulate matter sensor is in a full state based on the particulate matter data; activating a heating element of the particulate matter sensor to a multiple of intermittent temperatures that clean the sensor pre-patory to the next measurement. By this manner, many reactive chemicals are removed before they can react with and poison the sensor materials.

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Columbus, IN, United States of America

Matthew W Hormann