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 |
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.
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