Compression ignition engine system with improved regeneration via controlled ash deposits

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United States of America Patent

PATENT NO 9863298
SERIAL NO

14531404

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An engine system includes an electronically controlled compression ignition engine configured to burn diesel fuel and a high ash oil to produce an exhaust with a temperature and NOx to soot ratio as well as a controlled level of ash deposits on the particulate filter of the system. An aftertreatment system is fluidly connected to the engine and includes a diesel oxidation catalyst, a reductant supply, and a diesel particulate filter coated with a NOx reduction catalyst. The soot load density on the diesel particulate filter can be stabilized by oxidizing soot at about a same rate as the compression ignition engine is supplying soot to the aftertreatment system.

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Patent Owner(s)

  • CATERPILLAR INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Shull, Brandon Peoria, US 3 6
Silver, Ronald Peoria, US 29 289

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