Particulate matter detection system and method
AssigneeDelphi Technologies IP Limited
InventorsGerard W. Malaczynski, Gregory T. Roth
Life of this patent
Estimating the term…
Abstract
A method of quantifying a particulate matter in an exhaust stream includes the steps of accumulating a particulate matter on a sensor. The sensor provides a signal that varies based upon an amount of the particulate on the sensor. The sensor includes a measurement cycle that includes a deadband zone, followed by an active zone, which is followed by a regeneration zone. The particulate matter is calculated after an end of the deadband zone is reached and prior to an end of the measurement cycle.
Claims16
A method of quantifying a particulate matter in an exhaust stream comprising the steps of:
- accumulating a particulate matter on a sensor, wherein the sensor provides a signal that varies based upon an amount of the particulate on the sensor, wherein the sensor includes a measurement cycle that includes a deadband zone, followed by an active zone, which is followed by a regeneration zone;
- and
- calculating the particulate matter after an end of the deadband zone is reached and prior to an end of the measurement cycle;
- wherein the particulate matter calculating step includes determining at least one of a particulate matter mass, a particulate matter flux, and a particulate matter concentration;
- wherein the particulate matter calculating step includes determining at least one of an average amount and an instantaneous amount of the at least one of the particulate matter mass, the particulate matter flux, and the particulate matter concentration;
- and
- wherein the instantaneous amount of the at least one of the particulate matter mass, the particulate matter flux, and the particulate matter concentration is calculated using a second differential of conductance from the signal.
A method of quantifying a particulate matter in an exhaust stream comprising the steps of:
- accumulating a particulate matter on a sensor, wherein the sensor provides a signal that varies based upon an amount of the particulate on the sensor, wherein the sensor includes a measurement cycle that includes a deadband zone, followed by an active zone, which is followed by a regeneration zone;
- and
- calculating the particulate matter after an end of the deadband zone is reached and prior to an end of the measurement cycle;
- calculating a particulate matter in the deadband zone based upon the signal reaching a threshold resistance and a deadband zone total time at which the threshold resistance is reached from an end of the regeneration zone, and the step of summing a particulate matter from the deadband zone and the active zone to determine a total accumulated particulate matter during the measurement cycle.
A method of quantifying a particulate matter in an exhaust stream comprising the steps of:
- accumulating a particulate matter on a sensor, wherein the sensor provides a signal that varies based upon an amount of the particulate on the sensor, wherein the sensor includes a measurement cycle that includes a deadband zone, followed by an active zone, which is followed by a regeneration zone;
- and
- calculating the particulate matter in the deadband zone based upon the signal reaching a threshold resistance and a deadband zone total time at which the threshold resistance is reached from an end of the regeneration zone.
A system comprising:
- an exhaust system fluidly configured to define an exhaust stream;
- a sensor arranged in the exhaust system and configured to be exposed to the exhaust stream and accumulate a particulate matter on the sensor, wherein the sensor provides a signal that varies based upon an amount of the particulate matter on the sensor, wherein the sensor is configured to provide a measurement cycle that includes a deadband zone, followed by an active zone, which is followed by a regeneration zone;
- and
- a control system in communication with sensor, control system includes a controller configured to calculate at least one of:
- the particulate matter after an end of the deadband zone is reached and prior to an end of the measurement cycle;
- and
- the particulate matter in the deadband zone based upon the signal reaching a threshold resistance and a deadband zone total time at which the threshold resistance is reached from an end of the regeneration zone.
Dependencies are inferred from the claim text.