Caterpillar Inc.

Michael J Readey

Robert L Meyer

Brett M Bailey

Michael James Pollard

Craig F Habeger

Kent A Koshkarian

Christopher Joseph Rynders, Jr

Clifford E Cotton

Seung K Lee

An exhaust particulate filter for an engine system includes an array of filter cartridges positioned within a shell, each of the cartridges having an electrically powered heating element coupled therewith. Exhaust gases may be distributed among the cartridges according to a single distribution pattern, and the filter can be regenerated without diverting, dividing or bypassing exhaust gases from the filter. The filter cartridges may be cylindrical or wedge-shaped, or of a variety of other configurations. Regeneration may take place according to a non-axial regeneration propagation profile. Other aspects include feedback control and feedforward control of regeneration based on sensing an electrical resistance property of each of the electrically powered heating elements.

Electrically regenerated exhaust particulate filter having non-axial regeneration flame propagation

An exhaust particulate filter for an engine system includes an array of filter cartridges positioned within a shell, each of the cartridges having an electrically powered heating element coupled therewith. Exhaust gases are distributed among the cartridges according to a single distribution pattern, and the filter can be regenerated without diverting, dividing or bypassing exhaust gases from the filter. Other aspects include feedback control and feedforward control of regeneration based on sensing an electrical resistance property of each of the electrically powered heating elements.

Electrically regenerated exhaust particulate filter for an engine system and operating strategy therefor

A low cost process for self-forming a uniformly adherent protective rare earth silicate coating on a silicon-based ceramic component for protecting the component against corrosive/erosive environments. The coating is self-formed by an oxidation process of a silicon-based ceramic associated with a reaction between a silica (SiO ) film layer on the surface of silicon-based ceramic and the rare earth oxide existing inside of silicon-based ceramic component.

Method for forming a rare earth silicate coating on a silicon based ceramic component by controlled oxidation for improved corrosion resistance

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Boulder, CO, United States of America

Michael J Readey