Method and system for controlling filter operation

摘要

A particulate filter control system and method for controlling the same is disclosed. The particulate filter load monitoring system may transmit radio frequency signals through the resonant cavity and filter medium across a frequency range sufficient to generate more than one resonant mode. The system may contain additional sensors for monitoring additional exhaust characteristics and parameters. Further, a control unit may be configured to determine the amount of material accumulated in the particulate filter, detect failures and malfunctions of the exhaust after-treatment system and its associated components, and initiate an action based on the amount of material accumulated in the particulate filter, the determination of a system failure or malfunction, or input from one or more exhaust sensors.

主权项

1. A method of controlling filter operation, comprising:
providing a filter element configured to remove contaminant matter from a flow contained in a filter housing forming a radio frequency resonant cavity, and a filter load monitoring system, comprising at least one probe configured to transmit radio frequency signals through the resonant cavity and filter medium, at least one probe configured to receive radio frequency signals transmitted through the resonant cavity and filter medium, at least one sensor configured to monitor flow characteristics, and a control unit; transmitting radio frequency signals through said resonant cavity and filter medium across a frequency range sufficient to generate at least one resonant mode, where said at least one resonant mode corresponds to a spatial distribution of material in said filter; receiving radio frequency signals transmitted through said resonant cavity and filter medium across a frequency range sufficient to generate at least one resonant mode; monitoring at least one additional flow characteristic; determining, based on the radio frequency resonant curves, the amount of material in said filter; and initiating an action based on the amount of material in said filter, or input from one or more exhaust sensors.