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| Number | Title | Issue Date |
| 8186151 | Method to monitor HC-SCR catalyst NOx reduction performance for lean exhaust applications A method for initiating a regeneration mode in selective catalytic reduction device utilizing hydrocarbons as a reductant includes monitoring a temperature within the aftertreatment system, monitoring a fuel dosing rate to the selective catalytic reduction device, m... | 05/29/2012 |
| 8181452 | Particulate filter regeneration during engine shutdown Various systems and method are described for controlling an engine having an exhaust system which includes a particulate filter. One example method comprises, after shutting down the engine and spinning down the engine to rest, operating a vacuum pump to draw fresh ... | 05/22/2012 |
| 8181450 | Apparatus, system, and method for reducing NOemissions on an SCR catalyst using ammonia storage and slip control Various embodiments of an apparatus, system, and method are disclosed for reducing NOx emissions using ammonia storage on an SCR catalyst. For example, according to one representative embodiment, an apparatus for reducing NOx emissions in an en... | 05/22/2012 |
| 8181451 | Method of controlling the operation of a selective catalytic reduction plant A method of controlling the feeding of a reducing agent, such as urea or ammonia, to a selective catalytic reduction reactor, which is operative for removing NOx from a process gas of a process plant, comprising the steps of estimating a present value of at least on... | 05/22/2012 |
| 8181449 | Control method of exhaust gas purification system and exhaust gas purification system An exhaust gas purification system has an exhaust gas purification device for purifying components in exhaust gas from an internal combustion engine. In order to recover a purification ability of the device, and in order to prevent oil dilution occurring when post i... | 05/22/2012 |
| 8176730 | Exhaust gas purification device of internal combustion engine An SCR catalyst is provided in an exhaust pipe of an engine and a urea solution addition valve is provided upstream of the SCR catalyst in the exhaust pipe. An ECU calculates ammonia adsorption quantity of the SCR catalyst and controls urea solution addition quantit... | 05/15/2012 |
| 8171725 | Method of controlling exhaust gas purification system, and exhaust gas purification system In an exhaust gas temperature raising control for recovering purification ability of an exhaust gas purification device of an internal combustion engine, the exhaust gas temperature is efficiently raised to a target level without producing white smoke. In recovery c... | 05/08/2012 |
| 8171726 | Software, methods and systems including soot loading metrics One embodiment is a method including a unique soot loading metric. The method includes treating exhaust with a soot filter, sensing information including a pressure differential of the soot filter, a temperature of the soot filter, an ambient pressure, an air flow, ... | 05/08/2012 |
| 8171724 | Vehicle-based strategy for removing urea deposits from an SCR catalyst A method is provided for controlling regeneration of an SCR catalyst. The method includes coordinating the regeneration duration and temperature (e.g., longer/shorter regenerations and/or lower/higher temperatures) to the urea deposit loading. In this way, improved ... | 05/08/2012 |
| 8161737 | Apparatus for and method of purifying exhaust gas An exhaust gas pressure P, exhaust gas temperatures TU and TD on upstream and downstream of a DPF, a rotation speed Ne, a load Q, and an intake flow rate F as various operating conditions are read, and an amount of PM generated for short time Î... | 04/24/2012 |
| 8161735 | Clogging determining device for reducing agent passage and clogging determining method for reducing agent passage There are provided a clogging determining device for a reducing agent passage and a clogging determining method for a reducing agent passage, which can accurately detect clogging and estimate a clogged place when clogging occurs in any place of a supply line or a re... | 04/24/2012 |
| 8161736 | Exhaust gas cleaning system for engineering vehicle An exhaust gas cleaning system for an engineering vehicle, such as a hydraulic excavator, is capable of performing manual regeneration control of a regeneration fuel injector 40 that is started only under the following conditions: a manual regeneration starti... | 04/24/2012 |
| 8161734 | Exhaust gas purification device An exhaust gas purification device includes an exhaust pipe defining an exhaust passage, a first SOX adsorption portion having a first SOX adsorption material provided in the exhaust passage, a second SOX adsorption portion having a ... | 04/24/2012 |
| 8156736 | Exhaust hydrocarbon injection control system and method A system comprises an injection control module and a fuel film module. The injection control module controls a flow rate of fuel injected into an exhaust system to adjust a temperature of exhaust gas. The fuel film module determines an accumulation rate of fuel on a... | 04/17/2012 |
| 8156735 | Method for controlling a facility for treating exhaust gases from an internal combustion engine A facility for treating exhaust gases from an internal combustion engine (1) comprises catalytic oxidation means (3), a particle filter (4) placed downstream from the catalytic oxidation means (3), a reformer (5) to produce reforma... | 04/17/2012 |
| 8151558 | Exhaust system implementing SCR and EGR An exhaust system for use with an engine is disclosed. The exhaust system may have an exhaust passageway, a reduction catalyst located within the exhaust passageway, and a particulate filter located within the exhaust passageway upstream of the reduction catalyst. T... | 04/10/2012 |
| 8151559 | Exhaust purification device An exhaust purification device increases temperature of a particulate filter by at least one of a first temperature increase device and a second temperature increase device to combust and remove particulate matters deposited in a particulate filter. The second tempe... | 04/10/2012 |
| 8151557 | 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 t... | 04/10/2012 |
| 8146350 | 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... | 04/03/2012 |
| 8146351 | Regeneration systems and methods for particulate filters using virtual brick temperature sensors An exhaust control system includes a temperature sensor, a temperature estimation module, and an exhaust condition adjustment module. The temperature sensor measures an outlet temperature of an exhaust gas downstream from an emission reduction device. The temperatur... | 04/03/2012 |
| 8146349 | Exhaust system implementing temperature-constraining regeneration strategy An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passage, a particulate filter located within the exhaust passage, and a heating device located to selectively heat matter collected within the particulate filter.... | 04/03/2012 |
| 8136348 | Exhaust purification apparatus for engine An exhaust purification apparatus comprises an ammonia selective reduction-type NOx catalyst that selectively reduces NOx within exhaust gas by using ammonia as a reducing agent, a urea-water supply device that supplies urea-water into the exhaust gas existing upstr... | 03/20/2012 |
| 8127536 | Exhaust gas cleaning apparatus An exhaust gas cleaning apparatus is provided with an exhaust gas particulate filter, an oxidation catalytic converter and a regeneration control component. The exhaust gas particulate filter is arranged in an exhaust passage of an internal combustion engine for cap... | 03/06/2012 |
| 8117833 | Method and system using a reduction catalyst to reduce nitrate oxide A method of controlling a system having an internal combustion engine, a filter in an exhaust passage, a reduction catalyst downstream of said filter capable of reducing nitrate oxide contained in the exhaust gas with reductant supplied thereto is provided. The meth... | 02/21/2012 |
| 8117832 | Exhaust treatment device with electric regeneration system The present disclosure relates to a diesel exhaust treatment device including a catalytic converter positioned upstream from a diesel particulate filter. An electric heater is positioned between the catalytic converter and the diesel particulate filter. A shore stat... | 02/21/2012 |
| 8112988 | System and method for desulfating a NOtrap A method is described for controlling an engine with a NOx trap. The method may include adjusting timing of subsequent desulfation based upon a delay between initiating the desulfation process and a temperature increase in the NOx trap. ... | 02/14/2012 |
| 8109082 | System and method for assisting regeneration of a diesel engine particulate filter The invention concerns a system for assisting regeneration of a particulate filter (6) arranged in an exhaust line (3) of a diesel engine (1) associated with a oxidizing catalyst (7), the engine (1) being equipped with feeding mean... | 02/07/2012 |
| 8104271 | Exhaust purification device and exhaust purification method of internal combustion engine An SOX trap catalyst (11) in which at least one of an alkali metal and alkali earth metal is carried diffused is arranged in an exhaust passage of an internal combustion engine. By holding the temperature of the SOX trap catalyst (11 | 01/31/2012 |
| 8104270 | Electrically 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 th... | 01/31/2012 |
| 8096111 | Reduction of NOx trap at engine shutoff The reduction of a NOx trap upon engine shutdown is disclosed. One disclosed embodiment comprises adjusting a timing of creating a reductive environment in the exhaust conduit upstream of the lean NOx trap based upon the determined engine stop position. The creation... | 01/17/2012 |
| 8096112 | Exhaust after-treatment system having a secondary tank An exhaust after-treatment system having a main tank configured to retain and supply a reductant is disclosed. The exhaust after-treatment system includes a main heat source disposed in the main tank and configured to thaw the reductant. The exhaust after-treatment ... | 01/17/2012 |
| 8096113 | Exhaust purification system for internal combustion engine The exhaust purification system for an internal combustion engine according to the present invention includes fuel supply means for supplying fuel to the NOx storage-reduction catalyst from the upstream side thereof, and SOx poisoning recovery control executing mean... | 01/17/2012 |
| 8091346 | Method for modifying air provided for regeneration A method for regenerating a filtering device is disclosed. The method may include creating a flow of exhaust with a power source and providing air to a combustion device configured to heat the flow of exhaust. The method may also include determining if a parameter i... | 01/10/2012 |
| 8087238 | Method and device for the counterpressure-safe separation out and elimination of particles from fluid streams A method for operating a filter includes forcibly passing a stream of a fluid through a filter wall of the filter from a raw gas side to a clean gas side of the filter so as to separate out particles and particle constituents from the stream, wherein the particles a... | 01/03/2012 |
| 8082731 | Method and device for operating an internal combustion engine An internal combustion engine has a NOX storage catalyst. A storage capacity (NOX_STC) of the NOX storage catalyst is determined for the purpose of operating the internal combustion engine. The temperature (TEMP) of the NOX storage catalyst is increased if the stora... | 12/27/2011 |
| 8082730 | Engine system having particulate reduction device and method An internal combustion engine system includes an engine having an engine housing. The engine system further includes an exhaust system, and a turbine disposed within the exhaust system. A particulate reduction device is disposed in the exhaust system upstream of the... | 12/27/2011 |
| 8079212 | Exhaust purifying apparatus and exhaust purifying method for internal combustion engine In an exhaust purifying apparatus for an internal combustion engine on a vehicle, heating control is executed for supplying fuel to exhaust purification catalysts, thereby increasing the catalyst bed temperature. The heating control is suspended when the vehicle is ... | 12/20/2011 |
| 8079213 | Exhaust gas purification system for internal combustion engine An object of the invention is to provide a technique for improving the efficiency of performance regeneration process that is executed on NOx storage reduction catalysts provided in a plurality of branch passages branching from the exhaust passage and reduce emissio... | 12/20/2011 |
| 8074447 | Procedure to determine the sulfur removal of NOstorage catalytic converter The invention concerns a procedure to determine the sulfur removal of a NOx storage catalytic converter in an exhaust gas aftertreatment system of an internal combustion engine, whereby conditions, in which a surplus of the reducing agent is generated in ... | 12/13/2011 |
| 8069657 | Diesel particulate filter regeneration system A diesel combustion engine comprises multiple particulate filters and corresponding exhaust piping and valving in the exhaust manifold and/or exhaust line, configured to enable regeneration to occur in one of the DPF filters through heating the exhaust from a single... | 12/06/2011 |
