Patent ID: 11867112
Assignee: INTERNATIONAL ENGINE INTELLECTUAL PROPERTY COMPANY, LLC
Field: Environmental technology (Chemistry)
Classification: CPC F  B  Y | IPC B  F

Claim 0:
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.