Caterpillar Inc.

Vadiraj Prakash Kulkarni

Matthew Edward Leustek

Sylvain Joseph Charbonnel

Glenn Brian Cox

Jason Kenneth Bloms

Andrew Alfred Knitt

Michael Andrew Snopko

Rajesh Narayanan Nair

Tyler V Richards

David Kapparos

Rajiv Nanjundareddy

Matt Leustek

Sara K Michels

An after-treatment device that includes a diesel particulate filter (DPF) requiring periodic regeneration includes a sensor providing a signal indicative of a soot accumulation and at least one device providing an operating parameter indicative of a work mode of the machine. A controller determines a soot level and a readiness level based on the work mode of the machine, and further classifies the soot level relative to a desired range for initiating a regeneration event and initiates the regeneration event when the soot level falls within the desired range.

Diesel particulate filter regeneration control and method

Detecting ash in a diesel particulate filter includes receiving data indicative of signal attenuation for ash-responsive and ash-insensitive RF signals transmitted through a diesel particulate filter containing trapped soot and ash. A difference between the RF signals, such as a difference in signal attenuation, may be leveraged to detect a relative ash loading state or a change in relative ash loading state of the diesel particulate filter, and responsively indicate that filter cleaning is needed.

Ash detection in diesel particulate filter

A method of regenerating a particulate filter of an exhaust system of an engine system is disclosed. The method may include determining a condition indicative of an accumulation of hydrocarbons in the particulate filter, and monitoring the particulate filter to determine when to initiate regeneration of the particulate filter. The method may also include selecting a regeneration profile for regeneration of the particulate filter based on the determined condition, and regenerating the particulate filter in accordance with the regeneration profile.

Regeneration strategy for engine exhaust

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Dunlap, IL, United States of America

Vadiraj Prakash Kulkarni