Patent application number | Description | Published |
20080223019 | SCR COLD START HEATING SYSTEM FOR A DIESEL EXHAUST - An exhaust system includes a heating element that is disposed downstream from an engine and that introduces thermal energy into an exhaust of the engine. A selective catalyst reduction (SCR) unit is disposed downstream from the heating element and filters nitrogen oxides (NOx) within the exhaust. A control module is in communication with and energizes the heating element based on temperature of the SCR unit. | 09-18-2008 |
20080230038 | VAPOR ASSISTED COLD START ARCHITECTURE UTILIZING TANK GRADE VENT VALVES - A vapor fuel recovery system for fuel tanks is provided. The vapor recovery system comprises: a canister that captures vapor fuel expelled from the fuel tank; a vent valve that controls ventilation of vapor fuel from the fuel tank to the canister; and a vent bypass disposed between the canister and the vent valve that controls the flow of vapor fuel from the fuel tank to the on-board recovery canister when a fuel level in the fuel tank is full. The bypass includes a bypass valve and at least one orifice. | 09-25-2008 |
20080282671 | Electrically heated particulate filter propagation support methods and systems - A control system that controls regeneration of a particulate filter is provided. The system generally includes a regeneration module that controls current to the particulate filter to initiate combustion of particulate matter in the particulate filter. A propagation module estimates a propagation status of the combustion of the particulate matter based on a combustion temperature. A temperature adjustment module controls the combustion temperature by selectively increasing a temperature of exhaust that passes through the particulate filter. | 11-20-2008 |
20080282673 | Hybrid cold start strategy using electrically heated catalyst - A method of operating an engine control system includes generating an engine start signal, determining whether a cold start condition exists, energizing an electrically heated catalyst based on the cold start condition, determining the temperature of the electrically heated catalyst and selectively starting an engine based on the engine start signal and the electrically heated catalyst temperature. | 11-20-2008 |
20080282674 | Electrically heated particulate filter regeneration methods and systems for hybrid vehicles - A control system for controlling regeneration of a particulate filter for a hybrid vehicle is provided. The system generally includes a regeneration module that controls current to the particulate filter to initiate regeneration. An engine control module controls operation of an engine of the hybrid vehicle based on the control of the current to the particulate filter. | 11-20-2008 |
20080282677 | Electially heated particulate filter preparation methods and systems - A control system that controls regeneration of a particulate filter is provided. The system generally includes a fuel control module that controls injection of fuel into exhaust that passes through the particulate filter. A regeneration module controls current to the particulate filter to initiate regeneration after the fuel has been injected into the exhaust. | 11-20-2008 |
20080282678 | Electrically heated particulate filter restart strategy - A control system that controls regeneration of a particulate filter is provided. The system generally includes a propagation module that estimates a propagation status of combustion of particulate matter in the particulate filter. A regeneration module controls current to the particulate filter to re-initiate regeneration based on the propagation status. | 11-20-2008 |
20080282686 | Hybrid HC absorber/EHC PZEV exhaust architecture - A system may include a hydrocarbon (HC) absorber positioned in an exhaust flow path and an electrically heated catalyst (EHC) positioned in the exhaust flow path downstream of the HC absorber. | 11-20-2008 |
20080295482 | Electrically heated DPF/SCR 2-way system - An exhaust system may include a canister that is disposed downstream from an engine. A particulate filter (PF) is disposed within the canister and filters particulates within an exhaust from the engine. A reducing catalyst is disposed within the canister, is on the PF, and promotes reaction of a liquid reductant in the exhaust after reception by the PF. A heating element is disposed within the canister and heats particulate matter in the PF. | 12-04-2008 |
20080302086 | Electrically heated particulate filter diagnostic systems and methods - A system that diagnoses regeneration of an electrically heated particulate filter is provided. The system generally includes a grid module that diagnoses a fault of the grid based on at least one of a current signal and a voltage signal. A diagnostic module at least one of sets a fault status and generates a warning signal based on the fault of the grid. | 12-11-2008 |
20080307774 | SELECTIVE CATALYST REDUCTION LIGHT-OFF STRATEGY - An emissions control system comprises a temperature determination module and an emissions control module. The temperature determination module determines a first temperature of a heater element of a diesel particulate filter (DPF) assembly in an exhaust system and determines a second temperature of a catalyst of the DPF assembly. The emissions control module selectively activates the heater element, selectively initiates a predefined combustion process in an engine based upon the first temperature, and selectively starts a reductant injection process based upon the second temperature. | 12-18-2008 |
20080307775 | ELECTRICALLY HEATED PARTICULATE FILTER EMBEDDED HEATER DESIGN - An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine and wherein an upstream surface of the particulate filter includes machined grooves. A grid of electrically resistive material is inserted into the machined grooves of the exterior upstream surface of the PF and selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF. | 12-18-2008 |
20080307776 | ELECTRICALLY HEATED PARTICULATE FILTER REGENERATION USING HYDROCARBON ADSORBENTS - An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine. A grid of electrically resistive material selectively heats exhaust passing through the upstream end to initiate combustion of particulates within the PF. A hydrocarbon adsorbent coating applied to the PF releases hydrocarbons into the exhaust to increase a temperature of the combustion of the particulates within the PF. | 12-18-2008 |
20080307781 | ELECTRICALLY HEATED PARTICULATE FILTER USING CATALYST STRIPING - An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine. A grid of electrically resistive material is applied to an exterior upstream surface of the PF and selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF. A catalyst coating is applied to the PF that increases a temperature of the combustion of the particulates within the PF. | 12-18-2008 |
20090000284 | Ash reduction system using electrically heated particulate matter filter - A control system for reducing ash comprises a temperature estimator module that estimates a temperature of an electrically heated particulate matter (PM) filter. A temperature and position estimator module estimates a position and temperature of an oxidation wave within the electrically heated PM filter. An ash reduction control module adjusts at least one of exhaust flow, fuel and oxygen levels in the electrically heated PM filter to adjust a position of the oxidation wave within the electrically heated PM filter based on the oxidation wave temperature and position. | 01-01-2009 |
20090038295 | Electrically heated DPF start-up strategy - An exhaust system that processes exhaust generated by an engine has a diesel particulate filter (DPF) that is disposed downstream of the engine and that filters particulates in the exhaust. An electrical heater is disposed upstream of the DPF and selectively heats the exhaust to initiate combustion of the particulates. Heat generated by combustion of particulates in the heater induces combustion of particulates within the DPF. A control module selectively enables current flow to the electrical heater for an initial period of a DPF regeneration cycle, and limits exhaust flow while the electrical heater is heating to a predetermined soot combustion temperature. | 02-12-2009 |
20090071110 | MICROWAVE MODE SHIFTING ANTENNA SYSTEM FOR REGENERATING PARTICULATE FILTERS - A regeneration system comprises a particulate matter (PM) filter including a microwave energy absorbing surface, and an antenna system comprising N antennas and an antenna driver module that sequentially drives the antenna system in a plurality of transverse modes of the antenna system to heat selected portions of the microwave absorbing surface to regenerate the PM filter, where N is an integer greater than one. The transverse modes may include transverse electric (TE) and/or transverse magnetic (TM) modes. | 03-19-2009 |
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 |
20090071338 | OVERLAP ZONED ELECTRICALLY HEATED PARTICULATE FILTER - A system includes a particulate matter (PM) filter that includes an upstream end for receiving exhaust gas and a downstream end. A zoned heater is arranged spaced from the upstream end and comprises N zones, where N is an integer greater than one, wherein each of the N zones comprises M sub-zones, where M is an integer greater than or equal to one, and wherein the N zones and the M sub-zones are arranged in P layers, where P is an integer greater than one. A control module selectively activates at least a selected one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones and deactivates non-selected ones of the N zones. | 03-19-2009 |
20090074630 | INDUCTIVELY HEATED PARTICULATE MATTER FILTER REGENERATION CONTROL SYSTEM - A system includes a particulate matter (PM) filter with an upstream end for receiving exhaust gas, a downstream end and zones. The system also includes a heating element. A control module selectively activates the heating element to inductively heat one of the zones. | 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 |
20090183501 | DIESEL PARTICULATE FILTER WITH ZONED RESISTIVE HEATER - A diesel particulate filter assembly comprises a diesel particulate filter (DPF) and a heater assembly. The DPF filters a particulate from exhaust produced by an engine. The heater assembly has a first metallic layer that is applied to the DPF, a resistive layer that is applied to the first metallic layer, and a second metallic layer that is applied to the resistive layer. The second metallic layer is etched to form a plurality of zones. | 07-23-2009 |
20090217818 | WIRELESS ZONED PARTICULATE MATTER FILTER REGENERATION CONTROL SYSTEM - An assembly includes a particulate matter (PM) filter that comprises an upstream end for receiving exhaust gas, a downstream end and multiple zones. An absorbing layer absorbs microwave energy in one of N frequency ranges and is arranged with the upstream end. N is an integer. A frequency selective filter has M frequency selective segments and receives microwave energy in the N frequency ranges. M is an integer. One of the M frequency selective segments permits passage of the microwave energy in one of the N frequency ranges and does not permit passage of microwave energy in the other of the N frequency ranges. | 09-03-2009 |
20090293450 | COLD-START CONTROL SYSTEMS FOR INTERNAL COMBUSTION ENGINES - A cold-start control system includes an air pump control module that controls an air pump and an engine starting module that starts an engine. The air pump control module activates the air pump to supply oxygen to a catalytic converter based on a temperature of the catalytic converter. The engine starting module starts the engine based on the temperature of the catalytic converter. | 12-03-2009 |
20100095652 | EMISSION REDUCTION SYSTEM FOR TURBO CHARGED ENGINE - An emissions reduction system includes an emissions control module that selectively controls fuel injection at a lean A/F ratio based on a first temperature of a catalytic converter and that selectively turns on an electrically heated catalyst (EHC) based on the first temperature. A fuel injection module selectively injects fuel into an engine cylinder during an expansion stroke based on a second temperature of the EHC. | 04-22-2010 |
20100095655 | ZONED ELECTRICAL HEATER ARRANGED IN SPACED RELATIONSHIP FROM PARTICULATE FILTER - A system comprises a particulate matter (PM) filter that comprises an upstream end for receiving exhaust gas and a downstream end. A zoned heater is arranged spaced from the upstream end and comprises N zones, where N is an integer greater than one, wherein each of the N zones comprises M sub-zones, where M is an integer greater than one. A control module selectively activates at least a selected one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones and deactivates non-selected ones of the N zones. | 04-22-2010 |
20100095657 | ELECTRICALLY HEATED DIESEL PARTICULATE FILTER (DPF) - A diesel particulate filter assembly includes a diesel particulate filter (DPF) and an electric heater that is integrally formed at an upstream end of the DPF. The electric heater includes a heating substrate and a resistive heating element. The heating substrate includes a central region and a boundary region around the central region. The resistive heating element includes a plurality of conductive portions. Adjacent ones of the conductive portions in the central region form a first spacing. Adjacent ones of the conductive portions in the boundary region form a second spacing. The second spacing is smaller than the first spacing. | 04-22-2010 |
20100115921 | CATALYTIC COMBUSTOR STRATEGY USING HC ADSORBER - A vehicle system includes a hydrocarbon adsorber, a catalyst, a control module, and a heater. The hydrocarbon adsorber receives first exhaust gases, adsorbs hydrocarbons from the first exhaust gases, and outputs second exhaust gases. The catalyst receives the second exhaust gases. The control module controls a heater and fuel injectors. The heater heats a portion of the catalyst to a predetermined temperature. The control module controls the fuel injectors to generate a fuel-rich air/fuel mixture when the portion of the catalyst is heated to the predetermined temperature. | 05-13-2010 |
20100180577 | APPARATUS AND METHOD FOR ONBOARD PERFORMANCE MONITORING OF EXHAUST GAS PARTICULATE FILTER - The present invention is directed to a gas particulate treatment system and may include a gas filter and a gas filter performance monitor downstream of the gas filter. The gas filter performance monitor includes a particulate trap operable to collect particulates passing through the gas filter, and a sensing apparatus associated with the gas filter performance monitor that operates to sense particulate collection in the gas filter performance monitor. | 07-22-2010 |
20100186384 | INTEGRATED EXHAUST AND ELECTRICALLY HEATED PARTICULATE FILTER REGENERATION SYSTEMS - A system includes a particulate matter (PM) filter that includes multiple zones. An electrical heater includes heater segments that are associated with respective ones of the zones. The electrical heater is arranged upstream from and proximate with the PM filter. A post-fuel injection system injects fuel into at least one of a cylinder of an engine and an exhaust system. A control module is configured to operate in a first mode that includes activating the electrical heater to heat exhaust of the engine. The control module is also configured to operate in a second mode that includes activating the post-injection system to heat the exhaust. The control module selectively operates in at least one of the first mode and the second mode. | 07-29-2010 |
20100186385 | ELECTRICALLY HEATED PARTICULATE FILTER WITH ZONED EXHAUST FLOW CONTROL - A system includes a particulate matter (PM) filter that includes X zones. An electrical heater includes Y heater segments that are associated with respective ones of the X zones. The electrical heater is arranged upstream from and proximate with the PM filter. A valve assembly includes Z sections that are associated with respective ones of the X zones. A control module adjusts flow through each of the Z sections during regeneration of the PM filter via control of the valve assembly. X, Y and Z are integers. | 07-29-2010 |
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 |
20100205943 | ELECTRICALLY HEATED PARTICULATE FILTER ZONE-BASED POST FUEL INJECTION SYSTEM - A system includes a particulate matter (PM) filter with multiple zones. An electrical heater includes heater segments that are associated with respective ones of the zones. The electrical heater is arranged upstream from and proximate with the PM filter. A post fuel injection system injects fuel into at least one of a cylinder of an engine and an exhaust system. A control module selects one of the zones, adjusts post fuel injection based on the selected one of the zones, and electrically heats the one of the zones via a respective one of the heater segments. | 08-19-2010 |
20100212981 | SYSTEM AND METHOD FOR CONTROLLING AN ELECTRICALLY HEATED CATALYST FOR A HYBRID VEHICLE - A system and control module for controlling an electrically heated catalyst includes a remote start module generating a remote start signal, a catalyst control module controlling the electrically heated catalyst based on the remote start signal and an engine control module starting the engine after preheating and/or when required by the vehicle to honor a request as defined in this document. | 08-26-2010 |
20100276223 | HYBRID VEHICLE EXHAUST CONTROL STRATEGY - A hybrid vehicle emission control method may include operating the hybrid vehicle in a first mode during which a combustion engine is off and an electric motor propels the hybrid vehicle. An electrically heated selective catalytic reduction catalyst (EHSCR) may be energized during the first mode. The vehicle may be operated in a second mode after the first mode during which the engine propels the hybrid vehicle. | 11-04-2010 |
20100287912 | PREDICTING ASH LOADING USING AN ELECTRICALLY HEATED PARTICULATE FILTER - A control system includes a heater control module, a measured duration module, and a regeneration volume module. The heater control module selectively initiates a regeneration in a zone of a particulate filter in an exhaust system. The measured duration module measures a duration of the regeneration. The regeneration volume module determines an available volume within the particulate filter to regenerate particulate based on the measured duration of the regeneration. | 11-18-2010 |
20100300075 | ELECTICALLY HEATED PARTICULATE FILTER INCOMPLETE REGENERATION IDENTIFICATION SYSTEM AND METHOD - A system comprises a regeneration module and a diagnostic module. The regeneration module controls an electric heater to heat exhaust gas produced by an engine. The regeneration module determines when a regeneration cycle of a particulate matter (PM) filter begins by comparing a temperature of the exhaust gas input to the PM filter and a first temperature threshold. The diagnostic module determines a regeneration status by comparing a temperature of the exhaust gas output by the PM filter and a second temperature threshold during a predetermined period after the regeneration cycle begins. | 12-02-2010 |
20100305830 | CONTROL SYSTEMS AND METHODS FOR FUEL AND SECONDARY AIR INJECTION - An engine control system comprises an actuator control module and a tertiary injection module. The actuator control module provides secondary air to an exhaust system when a catalyst light-off mode is enabled and provides first and second injections of fuel to a cylinder during each engine cycle while the catalyst light-off mode is enabled. The tertiary injection module selectively provides a third injection of fuel to the cylinder during an exhaust phase of each engine cycle while the catalyst light-off mode is enabled. The first, second, and third injections are each separated by a period of time. | 12-02-2010 |
20100313547 | APPARATUS AND METHOD FOR REGENERATING AN EXHAUST FILTER - An exhaust gas particulate filter system for an internal combustion engine comprises an exhaust gas conduit in fluid communication with, and configured to receive exhaust gas from, the internal combustion engine. A hydrocarbon supply is connected to the exhaust gas conduit and is in fluid communication with the exhaust gas for delivery of hydrocarbon thereto. A particulate filter assembly is located downstream of the hydrocarbon injector for receipt of the exhaust gas and hydrocarbon mixture. The particulate filter assembly comprises an exhaust gas filter disposed therein for removal of particulates from the exhaust gas and an electrically heated catalyst device disposed therein, upstream of the exhaust gas filter, and heatable to induce oxidation of the exhaust gas and hydrocarbon mixture and to heat the exhaust gas filter and burn particulates collected therein. | 12-16-2010 |
20100318281 | FUEL CONTROL STRATEGY FOR HEATING A CATALYST - A control system for an engine having N cylinders in first and second banks includes a catalyst heat module and a fuel control module. N is an integer greater than two. The catalyst heat module selectively operates the engine in a catalyst heat mode to heat a catalyst. The fuel control module, throughout a fuel injection sequence for each of the N cylinders, adjusts a first air/fuel (A/F) ratio for the first bank to a rich value and adjusts a second A/F ratio for the second bank to a lean value. | 12-16-2010 |
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 |
20100326403 | ELECTRICALLY HEATED PARTICULATE FILTER REGENERATION DURING ENGINE START/STOP OPERATION - A control system comprises a combustion control module and a regeneration control module. The combustion control module controls operation of a vehicle in a first mode during which a combustion engine is off and in a second mode during which the combustion engine is on. The regeneration control module is in communication with the combustion control module and activates an electric heater during the first mode to heat an inlet of a particulate matter (PM) filter. Exhaust gas produced by the combustion engine enters the inlet and initiates a regeneration cycle of the PM filter in the second mode. | 12-30-2010 |
20110000194 | SELECTIVE CATALYTIC REDUCTION SYSTEM USING ELECTRICALLY HEATED CATALYST - An exhaust system includes N heating elements and a particulate matter (PM) filter. The N heating elements heat N portions of an exhaust gas. At least one of the N heating elements is coated with a first selective catalytic reduction (SCR) catalyst. The PM filter has an inlet that receives the N portions of the exhaust gas heated by the N heating elements. Each of the N portions of the exhaust gas heats a corresponding region of the inlet. N is an integer greater than 1. | 01-06-2011 |
20110000195 | REDUCED VOLUME ELECTRICALLY HEATED PARTICULATE FILTER - A control system comprises an exhaust treatment system, an electric heating module, and an exhaust heating module. The exhaust treatment system comprises a particulate matter (PM) filter and an electric heater. The PM filter includes M zones that receive exhaust gas of an engine and filter PM from the exhaust gas. The electric heater heats exhaust gas input to N of the M zones, wherein M is an integer greater than one and N is an integer less than M. The electric heating module activates the electric heater to heat exhaust gas input to the N zones to regenerate the N zones. The exhaust heating module heats exhaust gas input to the M zones by controlling an air-fuel ratio of the exhaust gas after the N zones regenerate. | 01-06-2011 |
20110004391 | ELECTRICALLY HEATED PARTICULATE FILTER - A control system comprises a particulate matter (PM) filter, an electric heater, a first heating module, and a second heating module. The PM filter includes M zones that filter PM from exhaust gas. The electric heater includes M segments corresponding to the M zones that heat exhaust gas input to selected ones of the M zones when activated. The first heating module activates N of the M segments to heat exhaust gas input to N of the M zones to regenerate the N zones. The second heating module operates in one of a first mode and a second mode to regenerate other ones of the M zones after the N zones are regenerated. The first mode includes adjusting an air-fuel ratio of the exhaust gas. The second mode includes activating other ones of the M segments to heat exhaust gas input to other ones of the M zones. | 01-06-2011 |
20110030344 | RADIANT HEATING SYSTEMS AND METHODS FOR CATALYSTS OF EXHAUST TREATMENT SYSTEMS - An exhaust treatment system comprises M three-way catalysts and N electrically heated catalysts (EHCs). The M three-way catalysts are arranged to receive exhaust gas output by an engine of a hybrid vehicle. M is an integer greater than one. The N EHCs are arranged to receive the exhaust gas and provide radiant heat to the M three-way catalysts when the N EHCs are powered. N is an integer greater than one. | 02-10-2011 |
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 |
20110047980 | ENGINE CONTROL SYSTEMS AND METHODS FOR MINIMIZING FUEL CONSUMPTION - An engine control system comprises a temperature control module and an engine disabling module. The temperature control module regulates a first temperature of an electrically heated catalyst (EHC) based on a first predetermined light-off temperature while an engine is shut down. The engine disabling module selectively disables start up of the engine when a second temperature of a passive catalyst is less than a second predetermined light-off temperature while a maximum torque output of an electric motor is greater than a desired torque output. | 03-03-2011 |
20110047981 | CATALYST TEMPERATURE CONTROL SYSTEMS AND METHODS FOR HYBRID VEHICLES - A catalyst temperature control system of the present disclosure includes a vehicle start anticipation module and an electrically heated catalyst (EHC) control module. The vehicle start anticipation module determines whether a vehicle start is anticipated based on at least one of a plurality of vehicle conditions before an ignition switch is turned on. The EHC control module activates an EHC based on the determination. | 03-03-2011 |
20110067386 | Oxidizing Particulate Filter - A particulate filter assembly for application to an exhaust system of an internal combustion engine comprises an exhaust gas particulate filter configured to receive and filter exhaust gas from an exhaust system. An oxidation catalyst compound is disposed on an outer radial region of the exhaust gas particulate filter and is configured to induce oxidation of carbon monoxide from the combustion of carbon and particulates, to thereby maintain temperatures in the radially outer portion at a level sufficient to maintain the combustion of carbon and particulates therein. | 03-24-2011 |
20110078999 | STATE OF CHARGE CATALYST HEATING STRATEGY - A control system includes a state of charge module and a control module. The state of charge module receives a parameter associated with a battery in a vehicle and determines a state of charge of the battery based on the parameter. The control module activates a heater in a catalytic converter in an exhaust system of the vehicle based on the state of charge. | 04-07-2011 |
20110214414 | ELECTRICALLY HEATED PARTICULATE FILTER ENHANCED IGNITION STRATEGY - An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine. A grid of electrically resistive material is applied to an exterior upstream surface of the PF and selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF. A catalyst coating applied to at least one of the PF and the grid. A control module estimates a temperature of the grid and controls the engine to produce a desired exhaust product to increase the temperature of the grid. | 09-08-2011 |
20110214569 | Radiant Zone Heated Particulate Filter - A system includes a particulate matter (PM) filter including an upstream end for receiving exhaust gas and a downstream end. A radiant zoned heater includes N zones, where N is an integer greater than one, wherein each of the N zones includes M sub-zones, where M is an integer greater than or equal to one. A control module selectively activates at least a selected one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones, restricts exhaust gas flow in a portion of the PM filter that corresponds to the selected one of the N zones, and deactivates non-selected ones of the N zones. | 09-08-2011 |
20110219752 | TARGETED PARTICULAR MATTER FILTER REGENERATION SYSTEM - A regeneration system includes a particulate matter (PM) filter. The PM filter has an upstream end that receives an exhaust gas from an engine. An air pump circuit directs ambient air to a first exhaust conduit upstream from the PM filter. A control module determines a current soot loading level of the PM filter. The control module also at least one of operates the engine in a rich mode and activates an air pump of the air pump circuit when the current soot loading level is greater than a predetermined soot loading level. | 09-15-2011 |
20110258984 | START-STOP HYBRID EXOTHERMIC CATALYST HEATING SYSTEM - A catalyst heating system includes a first monitoring module, a mode selection module and an electrically heated catalyst (EHC) control module. The first monitoring module monitors at least one of (i) a first temperature of a first catalyst of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the catalyst assembly. The mode selection module is configured to select an EHC heating mode and at least one of a fuel enrichment mode and a secondary air injection mode based on the at least one of the first temperature and the active catalyst volume. The EHC control module controls current to one of the first catalyst and a second catalyst of the catalyst assembly based on the mode signal. | 10-27-2011 |
20110258985 | Electrically Heated Filter Regeneration Methods and Systems - A method of regenerating a particulate filter is provided. The method includes estimating a stress level of the particulate filter; and selectively controlling current to a heater of the particulate filter based on the stress level. | 10-27-2011 |
20110258992 | Ammonia Slip Catalyst Diagnostic Methods and Systems - A method of diagnosing an ammonia slip catalyst device is provided. The method includes: computing a delta between a first temperature and a second temperature; evaluating the delta based on an efficiency threshold; and generating a fault notification based on the evaluating. | 10-27-2011 |
20110259190 | Electrically Heated Particulate Filter Heater Insulation - A system includes a particulate matter (PM) filter that includes an upstream end for receiving exhaust gas and a downstream end. A zoned resistive heater is arranged spaced from said upstream end and includes N zones, where N is an integer greater than one, wherein each of the N zones includes M sub-zones, where M is an integer greater than or equal to one, and wherein the zoned heater includes an electrically insulating material. A control module selectively activates at least a selected one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones and deactivates non-selected ones of the N zones. | 10-27-2011 |
20110271660 | EXHAUST TREATMENT METHODS AND SYSTEMS - A method of controlling an exhaust treatment system, comprising: selectively determining a first control state from a plurality of control states based on an exhaust temperature and a plurality of activation temperatures; estimating a reductant dose based on the control state; and controlling an injection of a reductant to the exhaust treatment system based on the reductant dose. | 11-10-2011 |
20110277449 | HYBRID CATALYST RADIANT PREHEATING SYSTEM - A catalyst heating system includes a monitoring module, a mode selection module and an electrically heated catalyst (EHC) control module. The monitoring module monitors at least one of (i) a first active volume of a catalyst assembly in an exhaust system of an engine and (ii) a first temperature of a non-EHC of the catalyst assembly. The mode selection module is configured to select a non-EHC radiant heating mode and generate a mode signal based on the at least one of the first active catalyst volume and the first temperature. An EHC control module increases temperature of the EHC to an elevated temperature that is greater than a stabilization temperature based on the mode signal. The stabilization temperature is greater than a catalyst light off temperature. | 11-17-2011 |
20110283675 | HYBRID CATALYST CONVECTIVE PREHEATING SYSTEM - A catalyst heating system includes a monitoring module, a mode selection module and an electrically heated catalyst (EHC) control module. The monitoring module monitors at least one of (i) a first temperature of a non-EHC of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the catalyst assembly. The mode selection module is configured to select an EHC heating mode and generate a mode signal based on the at least one of the first temperature and the active catalyst volume. The EHC control module controls current to an EHC of the catalyst assembly based on the mode signal. | 11-24-2011 |
20110320103 | Exhaust Treatment Methods and Systems - A method of evaluating a particulate filter of an exhaust treatment system is provided. The method includes: selectively enabling at least one of data collection and resistance evaluation based on a particulate matter level in the particulate filter; when data collection is enabled, computing a particulate filter resistance based on a linear regression model; and when resistance evaluation is enabled, evaluating an efficiency of the particulate filter based on the particulate filter resistance. | 12-29-2011 |
20120000180 | SYSTEM AND METHOD FOR PARTICULATE MATTER FILTER REGENERATION USING A CATALYTIC CONVERTER AS A COMBUSTOR - A control system for an engine includes an exhaust module and a combustion module. The exhaust module supplies a first MAF to exhaust produced by the engine upstream of a catalytic converter during regeneration of a PM filter located downstream of the catalytic converter. The combustion module, during the regeneration, supplies a first amount of fuel to a cylinder during an intake stroke based on the first MAF and a second MAF to the cylinder during the intake stroke. The combustion module, during the regeneration, further supplies a second amount of fuel to the cylinder during a subsequent intake stroke based on a first A/F ratio of the cylinder and an oxygen content of the exhaust downstream of the catalytic converter. A method for controlling an engine during regeneration of the PM filter is also provided. | 01-05-2012 |
20120000182 | HYDROCARBON ADSORBER REGENERATION SYSTEM - A regeneration system includes a first module, a mode selection module and an adsorber regeneration control (ARC) module. The first module monitors at least one of (i) a temperature of a first catalyst of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the first catalyst. The mode selection module is configured to select an adsorber regeneration mode and generates a mode signal based on the at least one of the temperature and the active catalyst volume. The ARC module at least one of activates an air pump and cranks the engine to regenerate an adsorber of the catalyst assembly while the engine is deactivated based on the mode signal. | 01-05-2012 |
20120023911 | DETECTION OF EXHAUST PARTICULATE FILTER SUBSTRATE FAILURE - A method of detecting failure of a substrate in a particulate filter includes comparing an absolute value of a difference between a theoretical temperature difference and an actual temperature difference between an upstream end and a downstream end of the particulate filter to a temperature differential threshold, and comparing an absolute value of a difference between a theoretical pressure difference and an actual pressure difference between the upstream end and the downstream end of the particulate filter to a pressure differential threshold. Failure of the substrate is indicated by one or both of the temperature difference and the pressure difference being greater than the temperature differential threshold and the pressure differential threshold respectively. | 02-02-2012 |
20120031072 | Target Particulate Matter Filter Regeneration and Temperature Control System - A regeneration system includes a particulate matter (PM) filter loading module that determines a current soot loading level of a PM filter. A PM filter temperature module determines a temperature of the PM filter. An exhaust flow rate module determines an exhaust flow rate of the PM filter. A control module deactivates an air pump of an air pump circuit and operates an engine within a predetermined range of stoichiometry based on the current soot loading, the temperature and the exhaust flow rate. | 02-09-2012 |
20120060471 | EXHAUST GAS AFTERTREATEMENT SYSTEM AND METHOD OF OPERATION - An exhaust gas after treatment system for an internal combustion engine comprises an oxidation catalyst device having a first substrate, a heater, and a second substrate disposed serially between the inlet and the outlet. A hydrocarbon supply is connected to and is in fluid communication with the exhaust system upstream of the oxidation catalyst device for delivery of a hydrocarbon thereto. The heater is configured to oxidize the hydrocarbon therein and to raise the temperature of the second substrate and exhaust gas passing therethrough. | 03-15-2012 |
20120060482 | PARTICULATE FILTER AND HYDROCARBON ADSORBER BYPASS SYSTEMS - A regeneration system includes a first comparison module that at least one of (i) compares a first temperature of an adsorber to an adsorber release temperature and (ii) compares a second temperature of an engine to a predetermined temperature, and generates a first comparison signal. A second comparison module that compares a particulate matter output of the engine with a predetermined output and generates a second comparison signal. A mode selection module that selects a mode and generates a mode signal based on the first comparison signal and the second comparison signal. A bypass valve control module that adjusts position of a bypass valve to bypass at least one of a particulate matter (PM) filter and the adsorber based on the mode signal. | 03-15-2012 |
20120067026 | Exhaust Gas Treatment System for an Internal Combustion Engine - An exhaust gas treatment system for an internal combustion engine comprises an oxidation catalyst device configured to oxidize the hydrocarbon and carbon monoxide in the exhaust gas. A first temperature sensor is located downstream of the oxidation catalyst device and has a temperature probe that is in fluid communication with the exhaust gas flow exiting the oxidation catalyst device. A second temperature sensor is located downstream of the oxidation catalyst device and has a temperature probe that is in fluid communication with the exhaust gas flow exiting the oxidation catalyst device. The temperature probe includes a catalyst compound coating disposed thereon and is operable to catalyze the oxidation of CO and HC, or a combination thereof, that exits the oxidation catalyst device. A controller is in signal communication with temperature sensors and is configured to monitor signals from temperature sensors to determine if the temperature differential exceeds a predetermined threshold. | 03-22-2012 |
20120117946 | CONTROL METHOD AND APPARATUS FOR REGENERATING A PARTICULATE FILTER - Control methods for regenerating particulate filter and an apparatus that includes an internal combustion engine, an exhaust gas conduit in fluid communication with and configured to receive exhaust gas from the internal combustion engine, and a particulate filter assembly in fluid communication with the exhaust gas conduit and configured to receive exhaust gas flowing therethrough. The particulate filter assembly includes a particulate filter to remove particulates from the exhaust gas, a heater device disposed near a front face of the particulate filter, to supply heat for regeneration of the particulate filter after shut-off of the internal combustion engine, and an air pump to input air into the particulate filter to transfer the supplied heat from the heater device to the particulate filter. | 05-17-2012 |
20120117947 | NOx ADSORBER REGENERATION SYSTEM AND METHOD - An exhaust gas after treatment system for an engine comprises an oxidation catalyst NOx adsorber wherein an oxidation catalyst compound and a NO | 05-17-2012 |
20120192717 | ELECTRICALLY HEATED PARTICULATE FILTER WITH REDUCED STRESS - A system comprises a particulate matter (PM) filter comprising an inlet for receiving exhaust gas. A zoned heater is arranged in the inlet and comprises a resistive heater comprising N zones, where N is an integer greater than one. Each of the N zones comprises M sub-zones, where M is an integer greater than one. A control module selectively activates one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones and deactivates others of the N zones. | 08-02-2012 |
20120204536 | CATALYTIC CONVERTER COMBUSTION STRATEGY FOR A HYBRID VEHICLE - A method of operating a hybrid vehicle when an internal combustion engine is not running includes heating a flow of air flowing through an exhaust gas treatment system of the internal combustion engine that is supplied by an air pump with a heating module and a hydrocarbon injector. The heating module heats an electrically heated catalyst of the exhaust gas treatment system in preparation for starting the internal combustion engine. Additionally, thermal energy is recovered from the flow of air downstream of the electrically heated catalyst and transferred to at least one other vehicle system to provide thermal energy to the vehicle system, such as an engine coolant for a cabin heating system or a transmission fluid for a drivetrain transmission system. | 08-16-2012 |
20120204539 | HYBRID VEHICLE THERMAL MANAGEMENT USING A BYPASS PATH IN A CATALYTIC CONVERTER UNIT - A hybrid vehicle includes an exhaust gas treatment system having a bypass valve for directing a flow of air or exhaust gas through a bypass path or through a primary catalyst. The hybrid vehicle includes an internal combustion engine and an electric motor, each selectively engageable with a transmission to provide a drive torque. The electric motor spins the internal combustion engine when engaged to provide the drive torque, thereby creating a flow of unheated air from the internal combustion engine that flows through the exhaust gas treatment system. The bypass valve directs the flow of air through the bypass path when the engine is spinning and not fueled to prevent cooling of the primary catalyst. The bypass valve directs the flow of exhaust gas through the primary catalyst when the internal combustion engine is spinning and is being fueled, i.e., running, to treat the flow of exhaust gas. | 08-16-2012 |
20120204540 | POWER SYSTEM AND METHOD FOR ENERGIZING AN ELECTRICALLY HEATED CATALYST - A power system and a method for energizing an electrically heated catalyst are provided. The system includes a first battery outputting a first voltage, and a second battery outputting a second voltage. The system further includes a switching device having a first operational state where the first and second batteries are coupled in series to one another, and a second operational state where the first and second batteries are coupled in parallel to one another. The system further includes a generator coupled to the first battery, and when the switching device is in the second operational state the generator supplies a third voltage to the first battery to charge the first and second batteries, and to the electrically heated catalyst such that the catalyst heats exhaust gases upstream of an oxidation catalyst. | 08-16-2012 |
20120222408 | Thermal Management Systems For Efficient Lean Operating Engines - A thermal management system includes a catalytic converter module that determines whether a catalytic converter is active. A selective catalytic reduction (SCR) catalyst module determines whether a SCR catalyst is active. An engine control module adjusts an air and fuel ratio of an engine to operate at a stoichiometric ratio and retards spark of the engine when the catalytic converter is not active. The engine control module at least one of performs post fuel injection and directly injects fuel into an exhaust system of the engine when the catalytic converter is active and the SCR catalyst is not active. | 09-06-2012 |
20120225752 | FUEL TYPE BASED START-STOP CATALYST HEATING SYSTEMS - A start-stop system includes a fuel type module that determines a fuel type of a fuel supplied to an engine. A threshold module determines a first threshold based on the fuel type. A temperature module estimates a temperature of a catalyst of an exhaust system of the engine. A comparison module compares the temperature to the first threshold and generates a comparison signal. A power module adjusts power to a heating circuit based on the comparison signal. The heating circuit is configured to increase temperature of the catalyst. The power module adjusts the power to the heating circuit to increase the temperature of the catalyst when the engine is shutdown. An engine control module shuts down and restarts the engine to reduce idling time of the engine. | 09-06-2012 |
20120247086 | EXHAUST METHANE CONTROL SYSTEMS AND METHODS - A system for a vehicle, includes a conversion temperature determination module and a heating control module. The conversion temperature determination module generates a methane conversion temperature corresponding to a predetermined methane conversion efficiency. The heating control module selectively applies power to a substrate of an electrically heated catalyst (EHC) based on a temperature of the EHC and the methane conversion temperature. The EHC includes at least one catalyst that reacts with methane in exhaust output from an engine. | 10-04-2012 |
20120255285 | ELECTRONICALLY HEATED SELECTIVE CATALYTIC REDUCTION (SCR) DEVICE - An exhaust gas treatment system is provided having an internal combustion engine, an exhaust gas conduit, a passive selective catalyst reduction (SCR) device, a heated SCR device, and a control module. The exhaust gas conduit is in fluid communication with and is configured to receive an exhaust gas from the internal combustion engine. The passive SCR device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The passive SCR includes a passive SCR temperature profile. The heated SCR device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The heated SCR device is located upstream of the passive SCR. The heated SCR is selectively activated to produce heat. The control module is in communication with the heated SCR and the engine and includes a control logic for determining the passive SCR temperature profile. | 10-11-2012 |
20120277973 | POWER SYSTEM AND METHOD FOR ENERGIZING AN ELECTRICALLY HEATED CATALYST - A power system and a method for energizing an electrically heated catalyst are provided. The system includes a battery outputting a first voltage, and a generator outputting a second voltage greater than the first voltage in response to a first signal. The system further includes a controller that generates a second signal to set a first switching device to a first operational state to apply the second voltage to the electrically heated catalyst to increase a temperature of the catalyst, if a first temperature level of the catalyst is less than a first threshold temperature level. The controller generates a third signal to induce the generator to output a third voltage, and generates a fourth signal to set a second switching device to a second operational state to apply the first voltage to the catalyst, if the first temperature level is greater than the first threshold temperature level. | 11-01-2012 |
20120304627 | ELECTRONICALLY HEATED HYDROCARBON (HC) ADSORBER - An exhaust gas treatment system is provided, having an internal combustion engine, an exhaust gas conduit, an electrically heated catalyst (“EHC”) device, an oxidization catalyst (“OC”) device, an OC temperature sensor, a hydrocarbon (“HC”) adsorber, and a control module. The hydrocarbon supply is selectively activated for delivery of a hydrocarbon and formation of an exhaust gas and hydrocarbon mixture therein. The EHC device is selectively activated to produce heat and induce oxidization. The OC device is in fluid communication with the exhaust gas conduit and located downstream of the EHC device. The OC temperature sensor is in fluid communication with the exhaust gas conduit and located downstream of the OC device. The HC adsorber is located downstream of the EHC device. The control module is in communication with the hydrocarbon supply, the EHC device, the OC device, the OC temperature sensor, and the HC adsorber. | 12-06-2012 |
20120324868 | METHOD FOR CONVERTING CONSTITUENT GASES IN AN INTERNAL COMBUSTION ENGINE EXHAUST GAS MIXTURE AND A VEHICLE INCORPORATING THE SAME - A vehicle includes an internal combustion engine operatively disposed therein. The engine generates exhaust gases. The vehicle further includes an alternator operatively connected to the engine. The alternator produces DC power. An ultracapacitor is operatively connected to the alternator to receive electrical energy therefrom. The vehicle still further includes an exhaust gas treatment system operatively connected to the engine to receive exhaust gases therefrom. The exhaust gas treatment system includes an electrically heated catalyst (EHC) device electrically connected to the ultracapacitor to selectively heat a catalytic exhaust system component. The ultracapacitor stores energy converted by the alternator from vehicle kinetic energy and releases the stored energy to heat the EHC. | 12-27-2012 |
20130031889 | METHOD OF TREATING EMISSIONS OF A HYBRID VEHICLE WITH A HYDROCARBON ABSORBER AND A CATALYST BYPASS SYSTEM - A method of treating emissions from an internal combustion engine of a hybrid vehicle includes directing a flow of air created by the internal combustion engine when the internal combustion engine is spinning but not being fueled through a hydrocarbon absorber to collect hydrocarbons within the flow of air. When the hydrocarbon absorber is full and unable to collect additional hydrocarbons, the flow of air is directed through an electrically heated catalyst to treat the flow of air and remove the hydrocarbons. When the hydrocarbon absorber is not full and able to collect additional hydrocarbons, the flow of air is directed through a bypass path that bypasses the electrically heated catalyst to conserve the thermal energy stored within the electrically heated catalyst. | 02-07-2013 |
20130042597 | PASSIVE SCR CONTROL SYSTEM AND METHOD - A thermal management system includes an enable module, a status module and a temperature control module. The enable module enables generation of ammonia for use in selective catalytic reduction (SCR) catalysts of an exhaust system during a passive SCR mode. The status module determines whether the exhaust system is operating in a passive SCR mode and generates a passive SCR active signal. The passive SCR mode includes operating an engine with rich air/fuel ratios. The temperature control module activates electrical heating of an oxidation catalyst based on the passive SCR active signal and a temperature of the oxidation catalyst. | 02-21-2013 |
20130047582 | CONTROL APPARATUS FOR TEMPERATURE EXCURSIONS WITHIN AN EXHAUST GAS TREATMENT SYSTEM - An exhaust gas treatment system for an internal combustion engine comprises a particulate filter assembly configured to receive exhaust gas from the engine. The particulate filter assembly comprises an electrically heated catalyst, a particulate filter disposed downstream of the electrically heated catalyst, a hydrocarbon injector, in fluid communication with the exhaust gas, upstream of the electrically heated catalyst and configured to inject excess hydrocarbon into the exhaust gas, an air pump in fluid communication with the exhaust gas upstream of the electrically heated catalyst and configured to deliver air to the exhaust gas to increase the volumetric gas flow rate through, and to decrease the heat residence time in, the particulate filter and a controller configured to operate the hydrocarbon injector, the electrically heated catalyst and the air pump based on predetermined exhaust gas flow rates, temperature thresholds and particulate loadings within the particulate filter. | 02-28-2013 |
20130061576 | SELECTIVE CATALYTIC REDUCTION (SCR) DEVICE CONTROL SYSTEM - An exhaust gas treatment system for an internal combustion engine is provided, including an exhaust gas conduit, an oxidation catalyst (“OC”) device, an electrically heated catalyst (“EHC”) device, a selective catalytic reduction (“SCR”) device, and a control module. The OC device is in fluid communication with the exhaust gas conduit. The OC device adsorbs hydrocarbons and is selectively activated to induce oxidation of the hydrocarbons in the exhaust gas. The EHC device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The EHC device is located within the OC device and is selectively activated to produce heat and induce further oxidation of the exhaust gas. The EHC device has an oxidation catalyst compound disposed thereon for converting nitrogen oxide (“NO”) to nitrogen dioxide (“NO | 03-14-2013 |
20130074474 | ENGINE OFF NH3 BASED SELECTIVE CATALYTIC REDUCTION NOX ADSORBER - An exhaust treatment system for an engine includes a selective catalyst reduction (SCR) treatment module that controls a valve and an air pump to deliver air to an SCR catalyst in response to the engine turning off. An SCR loading module controls the valve and the air pump to deliver air to an exhaust manifold and controls a dosing system to deliver a dosing agent upstream of the SCR catalyst when a temperature of the SCR catalyst is less than a temperature threshold and the SCR catalyst is not saturated with ammonia. | 03-28-2013 |
20130086886 | ELECTRICALLY HEATED OXIDATION CATALYST PARTICULATE MATTER PROTECTION - A control method for a heating device of an oxidation catalyst is provided. The control method includes: estimating an accumulation of particulate matter on the heating device; and selectively controlling a switching device in electrical communication with the heating device based on the estimated accumulation. | 04-11-2013 |
20130091826 | COLD START NO2 GENERATION SYSTEM - A cold start NO | 04-18-2013 |
20130099012 | SYSTEM AND METHOD FOR HEATING A VEHICLE CABIN - A method of heating a cabin of a motor vehicle that includes an internal combustion engine operatively connected to an exhaust system having a catalyst, and a heating, ventilation, and air conditioning (HVAC) system is provided. The method includes detecting a request to increase temperature inside the cabin, supplying fuel and air to the engine, and motoring the engine to pump the fuel and air into the exhaust system. The method also includes heating the catalyst to combust the fuel and air inside the catalyst such that a stream of post-combustion exhaust gas is generated. The method additionally includes channeling the generated stream of post-combustion exhaust gas to the HVAC system such that a temperature of a coolant circulated through the HVAC system is increased to heat the cabin. A system configured to perform the above method is also disclosed. | 04-25-2013 |
20130111886 | Electronically Heated NOx Adsorber Catalyst - An exhaust gas treatment system for an internal combustion engine is provided, and includes an exhaust gas conduit, an upstream selective catalytic reduction (“SCR”) device, an electrically heated catalyst (“EHC”) device, an oxidation catalyst (“OC”) device, a downstream SCR device, and a control module. The EHC device is in fluid communication with the exhaust gas conduit and is configured to receive the exhaust gas. The EHC device is located downstream of the upstream SCR device and is selectively activated to produce heat. The OC device is in fluid communication with the exhaust gas conduit, and is selectively heated by the EHC device. At least one of the EHC device and the OC device have a NO | 05-09-2013 |
20130118150 | EXHAUST SYSTEM FOR INTERNAL COMBUSTION ENGINE - In an exemplary embodiment of the invention an exhaust gas after treatment system for an internal combustion engine comprises an exhaust gas conduit configured to transport exhaust gas from the internal combustion engine to exhaust treatment devices of the exhaust gas treatment system. A controller in signal communication with the exhaust gas aftertreatment system is configured to monitor the temperature of a selective catalytic reduction device, wherein the controller is operable to move a valve assembly to an open position when the selective catalytic reduction device is at or above an operating temperature and to move the valve assembly to a closed position when the selective catalytic reduction device is below the operating temperature for entrainment of NOx constituents from the exhaust gas. | 05-16-2013 |
20130125530 | BYPASS HC - NOX ADSORBER STRATEGY - A bypass HC-NO | 05-23-2013 |
20130125534 | ELECTRICALLY HEATED PARTICULATE FILTER RESTRIKE METHODS AND SYSTEMS - A method of regenerating a particulate filter that includes an electric heater is provided. The method includes determining a location of particulate matter that remains within at least one region of the particulate filter based on a regeneration event being extinguished; and selectively controlling current to a zone of a plurality of zones of the electric heater to initiate a restrike of the regeneration event based on the location of particulate matter. | 05-23-2013 |
20130133307 | POWER SYSTEM AND METHOD FOR ENERGIZING AN ELECTRICALLY HEATED CATALYST - A power system and a method for energizing an electrically heated catalyst are provided. The system includes a controller that generates a first control signal to set a switching device to a first operational state if the first temperature level downstream of the catalyst is less than a threshold temperature level and the engine is being decelerated. The controller further generates a second control signal to induce a generator to output a second voltage if the first temperature level is less than the threshold temperature level and the engine is being decelerated, such that the second voltage is applied through the switching device in the first operational state to the catalyst to increase a temperature of the catalyst. | 05-30-2013 |
20130138291 | REGENERATION DIAGNOSTIC METHODS AND SYSTEMS - A method of monitoring an exhaust treatment system of a vehicle is provided. The method includes: determining a modeled resistance of exhaust flow in the exhaust treatment system; determining a measured resistance of exhaust flow in the exhaust treatment system; evaluating the modeled resistance and the measured resistance to determine a fault status; and generating at least one of a warning signal and a message based on the fault status. | 05-30-2013 |
20130152553 | Selective Catalytic Reduction (SCR) System For NOx Storage - An exhaust gas treatment system for an internal combustion engine is provided, including an exhaust gas conduit, a flow-through container of absorbent particles, an electrically heated catalyst (“EHC”) device, a selective catalytic reduction (“SCR”) device, and a control module. The exhaust gas conduit is in fluid communication with, and is configured to receive an exhaust gas from the internal combustion engine. The exhaust gas contains oxides of nitrogen (“NO | 06-20-2013 |
20130239552 | CONTROL SYSTEM FOR REDUCING NITROUS OXIDE ("N2O") AFTER SELECTIVE CATALYTIC REDUCTION ("SCR") DEVICE LIGHT-OFF - An exhaust gas treatment system for an internal combustion engine is provided having an exhaust gas conduit, an oxidation catalyst (“OC”) device, a selective catalytic reduction (“SCR”) device, and a control module. The internal combustion engine has at least one operating parameter. The exhaust gas conduit is in fluid communication with, and is configured to receive an exhaust gas from the internal combustion engine. The exhaust gas contains oxides of nitrogen (“NO | 09-19-2013 |
20130239554 | EXHAUST GAS TREATMENT SYSTEM HAVING A SOLID AMMONIA GAS PRODUCING MATERIAL - An exhaust gas treatment system for an internal combustion engine is provided, including an exhaust gas conduit, a pressurized vessel, a selective catalytic reduction (“SCR”) device, and a control module. The internal combustion engine has a plurality of pistons and an engine off condition that indicates that the pistons are generally stationary. The exhaust gas conduit is in fluid communication with, and configured to receive an exhaust gas from the internal combustion engine. The pressurized vessel stores a solid ammonia gas producing material. The pressurized vessel is selectively activated to heat the solid ammonia gas producing material into an ammonia gas. The ammonia gas is released into the exhaust gas conduit. The SCR device is in fluid communication with the exhaust gas conduit and is configured to receive the ammonia gas. | 09-19-2013 |
20130255227 | SYSTEM AND METHOD FOR HYDROCARBON ADSORBER REGENERATION IN A HYBRID VEHICLE - A control system for a hybrid vehicle is presented. The control system can include an air/fuel ratio control module that selectively commands a rich air/fuel ratio upon starting an engine based on a temperature of an electrically heated catalyst (EHC) in an exhaust system of the engine, wherein the EHC includes a hydrocarbon (HC) adsorber. The control system can include an air pump control module that selectively activates an air pump supplying air into the exhaust system upstream from the EHC based on whether the engine is on and at least one of whether the HC adsorber is full and whether the EHC is saturated with oxygen. The control system can also include an electric heater control module that selectively activates an electric heater of the EHC based on whether the engine is on and the temperature of the EHC, as well as whether the HC adsorber is full. | 10-03-2013 |
20130291515 | Engine Off Particulate Filter ("PF") Regeneration Using a Plurality of Secondary Energy Storage Devices - An exhaust gas treatment system for an internal combustion engine is provided. The internal combustion engine has an engine off condition. The exhaust gas treatment system includes particulate filter (“PF”) device in fluid communication with an exhaust gas conduit, an electric heater, a primary energy storage device, a plurality of secondary energy storage devices, and a control module. The PF device has a filter structure for removal of particulates in the exhaust gas, and is selectively regenerated based on an amount of particulates trapped within the filter structure of the PF device. The electric heater is disposed upstream of the filter structure and is selectively energized to provide heat for regeneration of the PF device. The plurality of secondary energy storage devices are selectively connected to the primary energy storage device. The secondary energy storage devices selectively energize the electric heater. | 11-07-2013 |
20130291526 | Engine Off Particulate Filter ("PF") Regeneration Using a Single Secondary Energy Storage Device - An exhaust gas treatment system for an internal combustion engine is provided. The internal combustion engine has an engine off condition. The exhaust gas treatment system includes particulate filter (“PF”) device in fluid communication with an exhaust gas conduit, an electric heater, a primary energy storage device, a single secondary energy storage device, and a control module. The PF device has a filter structure for removal of particulates in the exhaust gas, and is selectively regenerated based on an amount of particulates trapped within the filter structure of the PF device. The electric heater is disposed upstream of the filter structure and is selectively energized to provide heat for regeneration of the PF device. The single secondary energy storage device is selectively connected to the primary energy storage device. The single secondary energy storage device selectively energizes the electric heater. | 11-07-2013 |
20130313243 | GENERATOR POWERED ELECTRICALLY HEATED DIESEL PARTICULATE FILTER - A control circuit for a vehicle powertrain includes a switch that selectivity interrupts current flow between a first terminal and a second terminal. A first power source provides power to the first terminal and a second power source provides power to the second terminal and to a heater of a heated diesel particulate filter (DPF). The switch is opened during a DPF regeneration cycle to prevent the first power source from being loaded by the heater while the heater is energized. | 11-28-2013 |
20140026544 | SYSTEM FOR PROVIDING POWER TO AN ELECTRICALLY HEATED CATALYST - An exhaust gas treatment system for an internal combustion engine is provided. The exhaust gas system includes an exhaust gas conduit, a generator, a vehicle electrical system, a primary energy storage device, a rechargeable secondary energy storage device, an electrically heated catalyst (“EHC”) device, and a control module. The primary energy storage device is selectively connected to the generator. The primary energy storage device has a threshold state of charge (“SOC”). The rechargeable secondary energy storage device is selectively connected to the generator and the vehicle electrical system. The EHC device is in fluid communication with the exhaust gas conduit. The EHC device has an electric heater that is selectively connected the generator for receiving energy and a selectively activated catalyst that is heated to a respective light-off temperature. | 01-30-2014 |
20140060014 | ELECTRICALLY HEATED CATALYST DEVICE HAVING A VARIABLE RESISTANCE MONOLITH - An exhaust gas treatment system for an internal combustion engine is provided and includes an exhaust gas conduit, a generator, an electrically heated catalyst (“EHC”) device, and a control module. The exhaust gas conduit is in fluid communication with, and is configured to receive an exhaust gas from the internal combustion engine. The generator operates at a generator speed to produce electrical power. The EHC device is in fluid communication with the exhaust gas conduit. The EHC device includes a monolith structure that is divided into a plurality of segments that define discrete resistive paths. The resistive paths are selectively connected to the generator for receiving electrical power. The control module is in communication with the EHC device, the generator, and the internal combustion engine. The control module includes control logic for determining the generator speed. | 03-06-2014 |
20140060044 | SYSTEM AND METHOD FOR CONTROLLING FLUID FLOW INTO AND/OR OUT OF A CATALYTIC HEAT EXCHANGER BASED ON A CATALYST TEMPERATURE - A system includes a heat exchanger and a fluid flow control module. The heat exchanger includes a substrate, a catalyst applied to the substrate, and fluid passages. Exhaust gas from an engine flows through the heat exchanger and a working fluid in the fluid passages absorbs heat from the exhaust gas. The fluid flow control module controls fluid flow from the heat exchanger based on a temperature of the catalyst. | 03-06-2014 |
20140072477 | ELECTRICALLY HEATED CATALYST WITH WASTE HEAT RECOVERY - A catalytic converter includes an inlet end, an outlet end and a catalyst body. The inlet end is configured to receive an exhaust gas from an engine. An outlet end is configured to output the exhaust gas. A catalyst body includes partitioning members disposed between the inlet end and the outlet end. The catalyst body includes exhaust channels and fluid channels. The exhaust channels are configured to guide the exhaust gas from the inlet end to the outlet end. The fluid channels are configured to receive a fluid from and return the fluid to a waste heat recovery circuit. Each of the exhaust channels and each of the fluid channels includes a respective ones of the partitioning members. | 03-13-2014 |
20140130665 | REGENERATION OF A PARTICULATE FILTER BASED ON A PARTICULATE MATTER OXIDATION RATE - An exhaust gas treatment system for an internal combustion engine is provided comprising an exhaust gas conduit, a particulate filter (“PF”) device, a hydrocarbon source and an electronic control module including operative logic which when implemented. The PF has a filter structure for removal of particulates in the exhaust gas and is selectively regenerated based on an amount of particulates trapped within the filter structure of the PF device. The control module is in communication with the internal combustion engine and the hydrocarbon source, and receives a regeneration signal indicating the amount of particulates trapped within the filter structure of the PF device. The electronic control module includes control logic for monitoring the internal combustion engine prior to a regeneration event. The electronic control module includes control logic for determining a plurality operating parameters of the internal combustion engine based on the monitoring. | 05-15-2014 |
20140136075 | ENERGY CONTROL SYSTEMS AND METHODS FOR A POWERTRAIN OF A VEHICLE - A system includes a mode module and an energy module. The mode module generates a mode signal based on a temperature of an engine and at least one of a deceleration signal and a regenerative braking signal. The energy module, based on the mode signal, increases cooling of a coolant of the engine during at least one of a deceleration event of a vehicle and a regenerative braking event. The energy module, while increasing the cooling of the coolant, supplies an overvoltage to a cooling pump of the engine. | 05-15-2014 |
20140157982 | PARTICULATE FILTER REGENERATION MANAGEMENT - A method for implementing particulate filter regeneration management is provided. The method includes determining a presumptive deviation between a particulate model and actual particulate level conditions of the particulate filter. The presumptive deviation is determined from identification of an occurrence of extended parking, a passive regeneration, residual particulates, and a pressure signal. Each of the extended parking, passive regeneration, residual particulate, and pressure signal is specified by a respective particulate model deviation type. The method also includes selectively controlling current to at least one zone of a plurality of zones of an electric heater to initiate a regeneration event based on the presumptive deviation, and estimating the particulate level in the particulate filter once the regeneration event is complete. | 06-12-2014 |
20140165535 | SYSTEM AND METHOD FOR CONTROLLING REGENERATION WITHIN AN AFTER-TREATMENT COMPONENT OF A COMPRESSION-IGNITION ENGINE - A method for controlling regeneration within an after-treatment component of an engine comprises receiving a signal indicative of whether the engine is in an operating state or a non-operating state and detecting, based on the signal, when the engine has departed an operating state and entered a non-operating state. When the engine has departed an operating state and entered a non-operating state, a regeneration event is initiated. The regeneration event comprises causing a stream of air to flow through the after-treatment component and initiating a flow of fuel into the stream of air. | 06-19-2014 |
20140190147 | HYBRID ELECTRIC VEHICLE PARTICULATE REGENERATION METHOD AND SYSTEM - A method is applied to regenerate particulate matter in a particulate filter of a hybrid electric vehicle having a combination of a combustion engine and an electric motor for propelling the vehicle, the hybrid electric vehicle having an electrically heated catalyst disposed in flow communication with the particulate filter in an exhaust system of the vehicle. The method determines whether the combustion engine is or is not combusting fuel, and under a condition where the combustion engine is not combusting fuel, the catalyst is electrically heated until it has reached a temperature suitable to cause ignition of the particulate matter. The electric motor is used to facilitate rotation of the combustion engine at a rotational speed suitable to draw air into and be exhausted out of the combustion engine into the exhaust system, across the catalyst, and into the particulate filter to facilitate ignition of the particulate in the filter. | 07-10-2014 |
20140230408 | SYSTEM AND METHOD FOR EXHAUST GAS AFTERTREATMENT - In one embodiment, a method for controlling nitrogen oxides in an exhaust gas received by an exhaust system, the exhaust system including a first selective catalytic reduction device, an exhaust gas heat recovery device and a second selective catalytic reduction device is provided. The method includes flowing the exhaust gas from an internal combustion engine into the first selective catalytic reduction device, receiving the exhaust gas from the first selective catalytic reduction device into the exhaust gas heat recovery device and directing the exhaust gas to a heat exchanger in the exhaust gas heat recovery device based on a temperature of the internal combustion engine proximate moving engine components. The method includes adsorbing nitrogen oxides from the exhaust gas via a nitrogen oxide adsorbing catalyst disposed in the heat exchanger and flowing the exhaust gas from the exhaust gas heat recovery device into the second selective catalytic reduction device. | 08-21-2014 |
20140257676 | SYSTEM AND METHOD FOR CONTROLLING A COOLING SYSTEM OF AN ENGINE EQUIPPED WITH A START-STOP SYSTEM - A system according to the principles of the present disclosure includes a start-stop module, a pre-ignition risk module, and a cooling control module. The start-stop module stops and restarts an engine independent from an input received from an ignition system. The pre-ignition risk module monitors a risk of pre-ignition when the engine is restarted and generates a signal based on the risk of pre-ignition. The cooling control module controls a cooling system to circulate coolant through the engine when the engine is stopped in response to the risk of pre-ignition. | 09-11-2014 |
20140261254 | COOLANT CONTROL SYSTEMS AND METHODS FOR WARMING ENGINE OIL AND TRANSMISSION FLUID - A coolant control system of a vehicle includes a target pressure module and a thermostat valve control module. The target pressure module determines a target pressure of coolant in a coolant path between a thermostat valve and at least one of an engine oil heat exchanger and a transmission fluid heat exchanger. The thermostat valve control module closes the thermostat valve and blocks coolant flow out of an engine when a temperature of coolant within the engine is less than a predetermined temperature. When the temperature is greater than the predetermined temperature, the thermostat valve control module controls opening of the thermostat valve to the coolant path based on the target pressure. | 09-18-2014 |
20140278003 | REJUVENATION CONTROL OF PALLADIUM-ONLY DIESEL OXIDATION CATALYST - A method is disclosed for assessing and maintaining the use of a palladium-only (i.e., platinum free) oxidation catalyst body to oxidize carbon monoxide and hydrocarbons in the exhaust stream of a diesel engine powered vehicle, which is operated at a fuel-lean air-to-fuel ratio (A/F) for much of the time it powers a vehicle. Periodically, a recent history of the temperatures of the exhaust gas at the inlet to the palladium oxidation catalyst body is prepared in a computer control module. And a recent history of the A/F of the operating engine is considered. These temperature and A/F values are then used in determining whether the engine should be temporarily operated in a fuel-rich or stoichiometric A/F mode to provide an exhaust gas composition suitable for rejuvenation of the palladium by reducing its oxide formed during lean operation of the engine. | 09-18-2014 |
20140311122 | FLOW CONTROLLED ELECTRICALLY ASSISTED DPF REGENERATION - A particulate filter assembly, an exhaust gas treatment system having a particulate filter assembly, and a control method for flow controlled zoned regeneration of the particulate filter assembly are provided. The particulate filter assembly is configured to receive an exhaust gas stream from an internal combustion engine and includes an inlet end configured to receive the exhaust gas stream, a filter configured to remove particulates from the exhaust gas stream, a heating device positioned upstream from the filter having a plurality of zones, each zone of the plurality of zones independently operable to heat a corresponding region of the filter and an exhaust flow valve positioned downstream from the filter configured to selectively restrict flow of the exhaust gas stream through the filter. | 10-23-2014 |
20140311123 | ELECTRICALLY HEATED DOC USING HCSCR COLD START NOX CONTROLS - An exhaust gas treatment system for an internal combustion engine is provided. The system includes an exhaust gas conduit extending from the engine configured to receive an exhaust gas stream from the engine, a first injector in fluid communication with the exhaust gas conduit configured to selectively inject fuel containing unburned hydrocarbon (HC) into the exhaust gas conduit and an oxidation catalyst disposed in the exhaust gas conduit downstream from the first injector. The system further includes a hydrocarbon selective catalyst reduction (HCSCR) catalyst applied on the oxidation catalyst, a heating device positioned at an upstream side of the oxidation catalyst configured to heat the oxidation catalyst and HCSCR catalyst, a selective catalyst reduction (SCR) device disposed within the exhaust gas conduit downstream from the oxidation catalyst, and a particulate filter positioned downstream from the selective catalyst reduction device. | 10-23-2014 |
20140352279 | EXHAUST GAS TREATMENT SYSTEM WITH EMISSION CONTROL DURING FILTER REGENERATION - An exhaust gas treatment system for an engine includes an exhaust gas inlet tube configured to receive an exhaust gas from the engine. A particulate filter, a heat exchange system and first and second selective catalytic reduction (SCR) devices are in fluid communication with the exhaust gas inlet tube. The particulate filter is configured to undergo thermal regeneration when the exhaust gas in the particulate filter is heated above a regeneration temperature. The controller is configured to control a temperature difference, between a present temperature of the second SCR device and a predefined optimal second SCR temperature, to be within a predefined threshold during the thermal regeneration of the particulate filter. The controller may be configured to direct an injector to inject a reductant into the first SCR device when the temperature difference is below the predefined threshold, thereby controlling a NOx emission in the exhaust gas. | 12-04-2014 |
20140352303 | WASTE HEAT RECOVERY SYSTEM WITH INTEGRATED HYDROCARBON ADSORBER, AND METHOD THEREOF - A waste heat recovery system with an integrated hydrocarbon adsorber for a vehicle having an internal combustion engine that generates exhaust gas containing hydrocarbons, and a catalytic converter, includes an exhaust gas conduit, an exhaust gas heat exchanger, a heat exchanger bypass valve, a coolant circuit with a coolant bypass and a coolant bypass valve, and a controller. The exhaust gas heat exchanger includes at least one channel through which the exhaust gas is flowable, the channel having an interior surface coated with a hydrocarbon adsorbing material configured to adsorb hydrocarbons. The heat exchanger and coolant bypass valves are configured to selectively direct at least a portion of the exhaust gas and the coolant, respectively, to the exhaust gas heat exchanger or to bypass it. They are controlled by the controller such that the hydrocarbons in the exhaust gas are selectively adsorbable by and desorbable from the coating. | 12-04-2014 |
20140360162 | VOLTAGE CONTROL SYSTEM FOR HEATING A SELECTIVE CATALYST REDUCTION DEVICE - An exhaust gas treatment system for an internal combustion engine is provided. The exhaust gas treatment system includes an electrically heated catalyst (“EHC”) device in fluid communication with an exhaust gas conduit, a generator, a selective catalytic reduction (“SCR”) device, and a control module. The EHC device includes an electric heater and an EHC catalyst that is heated to an EHC light-off temperature. The generator is selectively operable in a target voltage mode to supply a target voltage to the electric heater. The target voltage represents a voltage required by the electric heater in order to maintain the EHC catalyst at a catalyst temperature. The SCR device is in fluid communication with the exhaust gas conduit. The SCR device is located downstream of the EHC device and includes an SCR catalyst that is selectively heated by the EHC device to a SCR light-off temperature. | 12-11-2014 |
20140372008 | COOLANT CONTROL SYSTEMS AND METHODS FOR TRANSMISSION TEMPERATURE REGULATION - A coolant control system of a vehicle includes a pump control module and a coolant valve control module. The pump control module selectively activates a coolant pump. The coolant pump pumps coolant into coolant channels formed in an integrated exhaust manifold (IEM) of an engine. The coolant valve control module selectively actuates a coolant valve that controls coolant flow from the coolant channels formed in the IEM to a transmission heat exchanger based on a first temperature of a transmission and a second temperature of coolant within the integrated exhaust manifold of the engine. | 12-18-2014 |