| Patent application number | Description | Published |
|---|
| 20090071124 | ELEVATED EXHAUST TEMPERATURE, ZONED, ELECTRICALLY-HEATED PARTICULATE MATTER FILTER - A system comprises an electrical heater and a particulate matter (PM) filter that is arranged one of adjacent to and in contact with the electrical heater. A control module selectively increases an exhaust gas temperature of an engine to a first temperature and that initiates regeneration of the PM filter using the electrical heater while the exhaust gas temperature is above the first temperature. The first temperature is greater than a maximum exhaust gas temperature at the PM filter during non-regeneration operation and is less than an oxidation temperature of the PM. | 03-19-2009 |
| 20090071126 | HIGH EXHAUST TEMPERATURE, ZONED, ELECTRICALLY-HEATED PARTICULATE MATTER FILTER - A system comprises a particulate matter (PM) filter including an upstream end for receiving exhaust gas and a downstream end. A zoned electric heater is arranged one of spaced from and in contact with the upstream end. A control module increases an exhaust temperature above a soot oxidation temperature before activating said electric heater to regenerate downstream portions of the PM filter. | 03-19-2009 |
| 20090071127 | FACE CRACK REDUCTION STRATEGY FOR PARTICULATE FILTERS - A system comprises a particulate matter (PM) filter that comprises an upstream end for receiving exhaust gas, a downstream end and at least one portion. A control module initiates combustion of PM in the PM filter using a heater and selectively adjusts oxygen levels of the exhaust gas to adjust a temperature of combustion adjacent to the at least one portion of the PM filter. A method comprises providing a particulate matter (PM) filter that comprises an upstream end for receiving exhaust gas, a downstream end and at least one portion; initiating combustion of PM in the PM filter using a heater; selectively adjusting oxygen levels of the exhaust gas to adjust a temperature of combustion adjacent to the at least one portion of the PM filter. | 03-19-2009 |
| 20090071128 | LOW EXHAUST TEMPERATURE ELECTRICALLY HEATED PARTICULATE MATTER FILTER SYSTEM - A system includes a particulate matter (PM) filter, a sensor, a heating element, and a control module. The PM filter includes with an upstream end that receives exhaust gas, a downstream end and multiple zones. The sensor detects a temperature of the exhaust gas. The control module controls current to the heating element to convection heat one of the zones and initiate a regeneration process. The control module selectively increases current to the heating element relative to a reference regeneration current level when the temperature is less than a predetermined temperature. | 03-19-2009 |
| 20090071129 | ELECTRICALLY HEATED PARTICULATE MATTER FILTER SOOT CONTROL SYSTEM - A regeneration system includes a particulate matter (PM) filter with an upstream end for receiving exhaust gas and a downstream end. A control module determines a current soot loading level of the PM filter and compares the current soot loading level to a predetermined soot loading level. The control module permits regeneration of the PM filter when the current soot loading level is less than the predetermined soot loading level. | 03-19-2009 |
| 20090113883 | VARIABLE POWER DISTRIBUTION FOR ZONED REGENERATION OF AN ELECTRICALLY HEATED PARTICULATE FILTER - A system includes a particulate matter (PM) filter with multiple zones, an electric heater and a control module. The electrical heater includes heater segments, which each correspond with a respective one of the zones. The electrical heater is arranged upstream from and is proximate with the PM filter. The control module selectively applies a first energy level to a first one of the zones via a first one of the heater segments to initiate regeneration in the first zone. The control module also selectively applies a second energy level that is less than the first energy level to a second one of the zones via a second one of the heater segments to initiate regeneration in the second zone. | 05-07-2009 |
| 20100192549 | METHOD AND SYSTEM FOR CONTROLLING AN ELECTRICALLY HEATED PARTICULATE FILTER - A method and system for controlling a diesel particulate filter includes a particulate matter load determination module determining a particulate matter load in a diesel particulate filter (DPF), a desired oxygen level determination module determining a desired exhaust gas oxygen level based on the particulate matter load, an oxygen comparison module comparing the desired exhaust gas oxygen level and a measured exhaust gas oxygen level and generating a comparison signal and an electric DPF control module controlling an electrically heated catalyst in response to the comparison signal. | 08-05-2010 |
| 20100319315 | DETECTING PARTICULATE MATTER LOAD DENSITY WITHIN A PARTICULATE FILTER - A control system includes a heater control module and a particulate matter (PM) load module. The heater control module selectively activates an electric heater to initiate regeneration in a zone of a particulate filter and deactivates the electric heater after the regeneration is initiated. The regeneration continues along a length of the particulate filter after the electric heater is deactivated. The PM load module determines a PM load based on an outlet temperature of the particulate filter after the regeneration is initiated. | 12-23-2010 |
| 20110030554 | ELECTRIC HEATER AND CONTROL SYSTEM AND METHOD FOR ELECTRICALLY HEATED PARTICULATE FILTERS - An exhaust treatment system comprises a particulate matter filter, a first heater element, and a second heater element. The particulate matter (PM) filter filters PM from exhaust gas and includes N zones. Each of the N zones includes an inlet area that receives a portion of the exhaust gas. N is an integer greater than one. The first heater element includes a contact area that heats exhaust gas input to an inlet area of a first one of the N zones. The second heater element includes a second contact area that heats exhaust gas input to an inlet area of a second one of the N zones. A ratio of the contact area of the first heater element to the inlet area of the first zone is greater than a ratio of the contact area of the second heater element to the inlet area of the second zone. | 02-10-2011 |
