Systems And Methods For Determining A Particulate Load In A Particulate Filter
First Claim
Patent Images
1. A method for regenerating a particulate filter, comprising:
- calculating a soot layer state correction factor based on a rate of regeneration and a rate of particulate loading in the particulate filter;
calculating an estimated soot load in the particulate filter based on a pressure drop of an exhaust gas flowing through the particulate filter and the calculated soot layer state correction factor; and
causing regeneration of the particulate filter when the estimated soot load is greater than or equal to a threshold value.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for regenerating a particulate filter may comprise calculating a soot layer state correction factor based on a rate of regeneration and a rate of particulate loading in the particulate filter and calculating an estimated soot load in the particulate filter based on a pressure drop of an exhaust gas flowing through the particulate filter and the calculated soot layer state correction factor. The method for regenerating the particulate filter may further comprise causing regeneration of the particulate filter when the estimated soot load is greater than or equal to a threshold value.
-
Citations
32 Claims
-
1. A method for regenerating a particulate filter, comprising:
-
calculating a soot layer state correction factor based on a rate of regeneration and a rate of particulate loading in the particulate filter; calculating an estimated soot load in the particulate filter based on a pressure drop of an exhaust gas flowing through the particulate filter and the calculated soot layer state correction factor; and causing regeneration of the particulate filter when the estimated soot load is greater than or equal to a threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A method for regenerating a particulate filter, the method comprising:
-
determining an engine NOx emission, an engine particulate matter emission and a temperature, a flow rate, and a pressure drop of an exhaust gas flowing through the particulate filter; determining a soot layer state parameter based on at least the engine NOx emission and the engine particulate matter emission; calculating a soot load estimate based on the pressure drop and the soot layer state parameter; and causing regeneration of the particulate filter when the soot load estimate is greater than or equal to a threshold value. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
-
-
28. A system for estimating soot load in a particulate filter, comprising:
-
a temperature sensor, a pressure drop sensor, and at least one engine sensor; and at least one controller configured to receive signals from the temperature sensor, the pressure drop sensor, and the at least one engine sensor, and dynamically estimate a soot layer state correction factor and a pressure drop based soot load based on the signals, wherein the controller is configured to estimate the soot layer state correction factor based on a rate of regeneration and a rate of particulate loading in the particulate filter and control regeneration of the particulate filter based on the pressure drop based soot load. - View Dependent Claims (29, 30, 31, 32)
-
Specification