US 11,867,112 B1
Logic for improved delta pressure based soot estimation on low restriction particulate filters
Paul Boon Charintranond, Palatine, IL (US); and Navtej Singh, Arlington Heights, IL (US)
Assigned to International Engine Intellectual Property Company, LLC, Lisle, IL (US)
Filed by International Engine Intellectual Property Company, LLC, Lisle, IL (US)
Filed on Mar. 7, 2023, as Appl. No. 18/118,287.
Int. Cl. F01N 9/00 (2006.01); F01N 3/023 (2006.01); F01N 3/08 (2006.01); F01N 3/025 (2006.01); F01N 3/36 (2006.01); B60K 13/04 (2006.01); F01N 13/00 (2010.01); F01N 3/035 (2006.01); F01N 3/20 (2006.01); F01N 11/00 (2006.01)
CPC F01N 9/002 (2013.01) [B60K 13/04 (2013.01); F01N 3/0232 (2013.01); F01N 3/0253 (2013.01); F01N 3/035 (2013.01); F01N 3/0821 (2013.01); F01N 3/36 (2013.01); F01N 13/0097 (2014.06); F01N 3/023 (2013.01); F01N 3/025 (2013.01); F01N 3/0233 (2013.01); F01N 3/2093 (2013.01); F01N 9/005 (2013.01); F01N 11/002 (2013.01); F01N 11/005 (2013.01); F01N 2250/02 (2013.01); F01N 2250/14 (2013.01); F01N 2410/04 (2013.01); F01N 2430/06 (2013.01); F01N 2430/08 (2013.01); F01N 2560/05 (2013.01); F01N 2560/07 (2013.01); F01N 2610/03 (2013.01); F01N 2610/148 (2013.01); F01N 2900/04 (2013.01); F01N 2900/0402 (2013.01); F01N 2900/0408 (2013.01); F01N 2900/0601 (2013.01); F01N 2900/10 (2013.01); F01N 2900/1406 (2013.01); F01N 2900/1411 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1606 (2013.01); F01N 2900/1611 (2013.01); F01N 2900/1808 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A vehicle having an exhaust system implementing delta pressure based estimation of accumulated soot within a diesel particulate filter, comprising:
an engine connected to an exhaust system, the exhaust system having therein a diesel oxidation catalyst and a diesel particulate filter;
a fuel injector device connected to the exhaust system upstream from the diesel oxidation catalyst and the diesel particulate filter;
a delta exhaust pressure sensor arrangement configured to measure a difference in exhaust pressure at an inlet to the diesel particulate filter and at an outlet to the diesel particulate filter; and
at least one controller connected to the fuel injector and to the delta exhaust pressure sensor arrangement, and being configured to:
1.) determine when to conduct an active regeneration of the diesel particulate filter based on an estimated amount of soot accumulated therein;
2.) in a first regeneration mode, cause the fuel injector device to inject fuel at a first rate into the exhaust stream, and re-evaluate amount of soot accumulated within the diesel particulate filter under increased volumetric flow of the exhaust stream; and
3.) in a second regeneration mode, cause the fuel injector device to inject fuel at a second rate into the exhaust stream in order to combust soot trapped in the diesel particulate filter.