# US 2013/0152518 A1 · Pulsed plasma regeneration of a particular filter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0152518 A1 - Document ID: US20130152518A1 - Status: Published application - Kind: A1 - Application number: 13/330,872 - Filed: 2011-12-20 - Published: 2013-06-20 - Earliest claimed: 2011-12-20 - Assignees: Caterpillar Inc. - Inventors: Sergey KORENEV - Web page: https://patentgrep.com/patent/US20130152518A1 ## CPC - F01N 9/002: {of filter regeneration} - B01D 46/50: Means for discharging electrostatic potential - B01D 46/785: {by electrical means, e.g. for the generation of electrostatic forces in order to reject particles} - B08B 7/02: by distortion, beating, or vibration of the surface to be cleaned {(B08B7/0007 takes precedence)} - F01N 3/021: by means of filters - F01N 3/0232: {removing incombustible material from a particle filter, e.g. ash} - F01N 3/0275: {using electric discharge means} - F01N 2240/28: a plasma reactor - Y02T 10/40: Engine management systems - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A method for removing matter from a filter is disclosed. The method may include measuring loading conditions of a filter media. The method may also include applying at least one voltage pulse between an electrode external to the filter media and a housing of the filter media to induce a plurality of shock waves directed toward the filter media, based on the loading conditions. ## Claims ### Claim 1 A method for removing matter from a filter, comprising: measuring loading conditions of a filter media; and based on the loading conditions, applying at least one voltage pulse between an electrode external to the filter media and a housing of the filter media to induce a plurality of shock waves directed toward the filter media. ### Claim 2 (depends on 1) The method of claim 1, wherein the at least one voltage pulse creates a non-thermal plasma that induces the plurality of shock waves. ### Claim 3 (depends on 1) The method of claim 1, wherein the at least one voltage pulse is negative. ### Claim 4 (depends on 2) The method of claim 2, wherein the at least one voltage pulse includes a plurality of voltage pulses. ### Claim 5 (depends on 4) The method of claim 4, further including: making a determination based on the loading conditions that regeneration is complete; and cease applying the plurality of voltage pulses between the electrode and the filter housing based on the determination. ### Claim 6 (depends on 4) The method of claim 4, wherein applying the plurality of voltage pulses includes applying the plurality of voltage pulses for a fixed period of time. ### Claim 7 (depends on 4) The method of claim 4, further including: acquiring pressure data from within the filter; determining a frequency between shock wave sets based on the pressure data; and adjusting a frequency of the plurality of voltage pulses based on the frequency of shock wave sets. ### Claim 8 (depends on 4) The method of claim 4, further including: acquiring pressure data from within the filter; determining a shock wave frequency spectrum for a first shock wave set based on the pressure data; and adjusting a rise time of the plurality of voltage pulses based on the shock wave frequency spectrum. ### Claim 9 (depends on 1) The method of claim 1, further including activating a filter servicing system to evacuate particulate matter dislodged from the filter by the shock waves. ### Claim 10 (depends on 9) The method of claim 9, wherein activating the filter servicing system includes: creating a pressure differential across the filter media to blow dislodged material from the filter media; and collecting the dislodged material. ### Claim 11 (depends on 10) The method of claim 10, wherein activating the filter servicing system further includes vibrating the filter media to remove loose matter. ### Claim 12 A regeneration system comprising: a filter media configured to collect matter from an exhaust flow; a conductive housing enclosing the filter media; a diagnostic device configured to monitor loading conditions of the filter media; an electrode disposed within the conductive housing separate from the filter media and electrically insulated from the conductive housing; a pulse generator configured to apply a voltage pulse between the electrode and the conductive housing such that a plurality of shock waves are created within the conductive housing; and a regeneration controller in communication with the pulse generator and the diagnostic device, and being configured to activate the pulse generator based on the loading conditions. ### Claim 13 (depends on 12) The system of claim 12, wherein the pulse generator is configured to apply a plurality of voltage pulses to the electrode. ### Claim 14 (depends on 12) The system of claim 12, wherein the voltage pulse is negative. ### Claim 15 (depends on 12) The system of claim 12, wherein the electrode is a carbon fiber electrode that is disk shaped. ### Claim 16 (depends on 12) The system of claim 12, wherein the electrode is coupled to the conductive housing, such that the shock waves propagate through the filter media away from the electrode, reflect off the conductive housing, and propagate back through the filter media toward the electrode. ### Claim 17 (depends on 13) The system of claim 13, further including a pressure sensor, wherein the regeneration controller is further configured to: acquire data from the pressure sensor; and adjust a frequency of the plurality of voltage pulses based on the data. ### Claim 18 (depends on 13) The system of claim 13, further including a pressure sensor, wherein the regeneration controller is further configured to: acquire data from the pressure sensor; adjust a rise time of the plurality of voltage pulses based on the data. ### Claim 19 (depends on 12) The system of claim 12, further including: a vacuum storage device configured to create a negative pressure on a side of the filter media; a gas storage device configured to discharge a pressurized gas at an opposite side of the filter media; and a receptacle configured to collect particulate matter dislodged from the filter media, wherein the regeneration controller is configured to activate the vacuum storage device and the gas storage device when regeneration of the filter media is complete. ### Claim 20 A power system, comprising: an engine configured to generate a flow of exhaust gas; a passage configured to direct the exhaust gas to the atmosphere; a conductive housing disposed in fluid communication with the passage; a filter media located within the conductive housing and configured to collect matter from the flow of exhaust gas; a diagnostic device configured to monitor loading conditions of the filter media; a disk-shaped electrode disposed within the conductive housing, and electrically insulated from the conductive housing, and located at one side of the filter media; a pulse generator configured to apply a voltage pulse between the electrode and the conductive housing such that a plurality of shock waves are created within the conductive housing; a service system configured to collect matter dislodged from the filter media by the plurality of shock waves; and a regeneration controller in communication the pulse generator, and the diagnostic device, and being configured to activate the pulse generator and the service system based on the loading conditions.