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| Number | Title | Issue Date |
| 8181447 | Exhaust gas purification device An ECU corrects a fuel addition interval, based on an amount of change between an exhaust gas temperature at present and a basic exhaust gas temperature obtained when a basic addition interval is set, to reduce the fuel addition interval with an increase in the amou... | 05/22/2012 |
| 8181445 | Device and method for exhaust gas aftertreatment The exhaust gas aftertreatment device according to the invention having a reforming unit for generating hydrogen by steam reforming, partial oxidation of hydrocarbons and/or mixed forms thereof is distinguished by the fact that the reforming unit is arranged directl... | 05/22/2012 |
| 8181448 | System for controlling urea injection quantity of vehicle and method thereof A system for controlling urea injection quantity of a vehicle, may include an SCR device, the SCR device purifying NOx, a pump configured to supply the SCR device with a urea solution of a urea tank through a urea supply line, a dosing injector disposed on the exhau... | 05/22/2012 |
| 8181446 | Exhaust emission purification apparatus for engine A reduction catalyst is disposed in an exhaust passage of an engine. A reducing agent added to the exhaust gas is urged to react with NOx in the exhaust gas, catalyzed by the reduction catalyst. A member for distributing the exhaust gas to which the reducing agent h... | 05/22/2012 |
| 8176729 | Perturbation control strategy for low-temperature urea SCR NOx reduction An emissions control method may include injecting a fuel into an engine exhaust gas provided to a diesel oxidation catalyst (DOC) when a DOC operating temperature is greater than a first limit, terminating the injecting when a temperature of a catalyst in communicat... | 05/15/2012 |
| 8171722 | Fluid delivery system A fluid delivery system for supplying fluid to an exhaust stream of a power source is disclosed. The fluid delivery system includes a supply manifold and a plurality of supply exit orifices fluidly linked to the supply manifold to allow the fluid to exit the manifol... | 05/08/2012 |
| 8171721 | Closed loop control of exhaust system fluid dosing An exhaust line fuel injection system and associated methods of operation and control are disclosed. The fuel passes through a regulating valve connected to a pressurized fuel source and an outlet connected to an exhaust system fuel supply line. The exhaust system f... | 05/08/2012 |
| 8171723 | Abnormality detection system and abnormality detection method for internal combustion engine When the NOx SCR catalyst (15) deteriorates, the NOx removal efficiency increases with an increase in the catalyst temperature as indicated by the curves B1 and B2. When there is an irregularity in the amount or quality of aqueous urea solution ... | 05/08/2012 |
| 8161731 | Selective catalytic reduction using controlled catalytic deactivation An exhaust treatment control system includes a controller configured to determine a value representative of a NO2 concentration associated with an exhaust gas upstream of a selective catalytic reduction (SCR) catalyst, and determine a value representative... | 04/24/2012 |
| 8161730 | Apparatus, system, and method for reducing NOemissions on an SCR catalyst Various embodiments of an apparatus, system, and method are disclosed for reducing NOx emissions on an SCR catalyst. For example, according to one representative embodiment, an apparatus for reducing NOx emissions in an engine exhaust includes ... | 04/24/2012 |
| 8156732 | Apparatus, system, and method for regenerating an exhaust gas treatment device An apparatus, system, and method are disclosed for regenerating an exhaust gas treatment device. A controller module directs an injector to provide reductant to an exhaust gas treatment device over a plurality of rich intervals during a regeneration cycle. In additi... | 04/17/2012 |
| 8156733 | Method of operating an internal combustion engine to heat up a selective catalyst reducer In one embodiment, the present invention relates to a method to operate an internal combustion engine equipped with an Electronic Control Unit (ECU) with memory, an exhaust system including a Diesel Oxidation Catalyst (DOC), a Diesel Particulate Filter (DPF), upstre... | 04/17/2012 |
| 8156734 | Method for operating a reagent metering valve and apparatus for carrying out the method The invention relates to a method for operating a metering valve arranged in an exhaust gas region of an internal combustion engine for metering a reagent or a precursor of a reagent, comprising a cooling device to prevent excess temperatures. The invention further ... | 04/17/2012 |
| 8151556 | Internal combustion engine exhaust after-treatment system and method Embodiments described herein relate to internal combustion engine exhaust after-treatment systems and to methods of treating exhaust of an internal combustion engine. ... | 04/10/2012 |
| 8151554 | Exhaust gas purification system for an internal combustion engine An object of the present invention is to perform removal of NOx in an exhaust gas purification system for an internal combustion engine equipped with an NOx catalyst while suppressing the consumption amount of reducing agent used for NOx removal even when the NOx ca... | 04/10/2012 |
| 8151555 | Power source system of internal combustion engine Provided is a technology enabling a temperature of an exhaust gas purifying device to rise more surely by operating an electric heater for a catalyst attached with the electric heater more steadily without exerting an excessive load on a battery. Included are the ba... | 04/10/2012 |
| 8146348 | Exhaust emission control device An exhaust emission control device reduces nitrogen oxide in exhaust air from an engine. The device includes an exhaust pipe, a catalyst, a supply device, a NOx detecting device, and a control device. The pipe defines a passage for the exhaust air. The catalyst is d... | 04/03/2012 |
| 8141349 | Exhaust emission control device and method for internal combustion engine, and engine control unit An exhaust emission control device for an internal combustion engine, which is capable of supplying a just enough amount of reducing agent to the NOx catalyst even when a catalyst is provided on an upstream side of the NOx catalyst. A catalyst and a NOx catalyst are... | 03/27/2012 |
| 8141350 | Electrically 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 b... | 03/27/2012 |
| 8141346 | System and method for monitoring reductant quality A method of operating an internal combustion engine having a reductant delivery and storage system in an emission control system, comprising of correlating a change in a monitored operating condition with a refill event to determine whether a reductant-diluting subs... | 03/27/2012 |
| 8141347 | Reductant storage sensing system and method A catalyst supported on a substrate includes a heater embedded in a sub-region of the substrate to heat a local region of the catalyst. The amount of ammonia stored on the catalyst may be determined and controlled through conductivity measurements in the the locally... | 03/27/2012 |
| 8141348 | Engine after-treatment controls using dosing below catalyst light-off temperature A method of controlling dosing of a hydrocarbon fuel into the exhaust gas of a combustion engine upstream of a particulate filter when the exhaust gas temperature into an oxidation catalyst upstream of a particulate filter has dropped below the light-off temperature... | 03/27/2012 |
| 8136346 | Internal combustion engine A post-treatment system comprised of an SOx trapping catalyst (11), a particulate filter (13) carrying an NOx storing and reducing catalyst, and an NOx storing and reducing catalyst (15) and a fuel feed valve ( | 03/20/2012 |
| 8136345 | Internal combustion engine exhaust treatment having a single valve directing exhaust to dual NOx traps A single valve (23, 50) directs engine exhaust (11, 12) toward alternative NOx traps (19, 20) which are adjacent to either diesel particulate filters (40, 41) or low temperature water gas shift catalysts (63, 64). Syngas is either ... | 03/20/2012 |
| 8132403 | Method of estimating quantity of NO produced in ammonia oxidation catalyst and exhaust gas purification system for internal combustion engine An object of the invention is to estimate the quantity of N2O produced in an ammonia oxidation catalyst in a case where the ammonia oxidation catalyst is provided in an exhaust passage of an internal combustion engine. In a case where an ammonia oxidation... | 03/13/2012 |
| 8132404 | Ammonia vapor storage and purge system and method A method is provided for managing vapor generation in a reductant storage and delivery system. In one example, urea vapors generated from liquid in a storage device are temporarily stored and later purged to the exhaust system of the engine. ... | 03/13/2012 |
| 8132401 | Exhaust purification device of internal combustion engine An internal combustion engine wherein an SOx trap catalyst (12), an NOx storage catalyst (14), and a fuel addition valve (15) are arranged in an engine exhaust passage. When making the air-fuel ratio of the exhaust gas flow... | 03/13/2012 |
| 8132402 | Exhaust purification device of internal combustion engine In an internal combustion engine, an NOx selective reduction catalyst is arranged in the engine exhaust passage, and a urea aqueous solution feed valve is arranged in the engine exhaust passage upstream of the NOx selective reduction catalyst. ... | 03/13/2012 |
| 8127535 | Method and system for purification of exhaust gas from diesel engines The invention provides a method and system for purification of a carbon monoxide, nitrogen oxides, incompletely combusted hydrocarbons and soot containing exhaust gas from a combustion engine comprising the steps of catalytically oxidizing the carbon monoxide in the... | 03/06/2012 |
| 8122709 | Device for delivering a reducing agent to an exhaust system of an internal combustion engine The invention relates to a device for supplying a reducing agent into an exhaust system of an internal combustion engine. The device includes a delivery pump for delivering the reducing agent from a storage tank into an exhaust tube of the exhaust system. A metering... | 02/28/2012 |
| 8122707 | Injection anti-coking system for particulate filters A system comprising an injector for injecting fuel directly into the exhaust system. A control module supplies fuel using the injector to burn particulate matter in the particulate filter when the control module determines that regeneration is needed. The control mo... | 02/28/2012 |
| 8122710 | Thermal management of urea dosing components in an engine exhaust after-treatment system Dosing components (22, 24, 32) in an engine exhaust after-treatment system (18) that includes an SCR catalyst (20) are thermally managed by flowing engine coolant through a coolant passage in a urea injector (22) that injects aqueous urea... | 02/28/2012 |
| 8122708 | Exhaust gas purification device An exhaust gas purification device having a DPF provided in an exhaust system of an internal combustion engine. The device has one or more sound pressure measurement means for measuring exhaust sound pressure and calculation means for calculating the amount of PM ac... | 02/28/2012 |
| 8117830 | Exhaust purification device for engine An agitating device for agitating the exhaust gas of an engine includes a base plate having a plurality of through holes that are defined by radially extending spoke portions and a ring-like rim portion and are arranged in a circular pattern in a circumferential dir... | 02/21/2012 |
| 8112987 | Process for reducing NOx emissions from engine exhaust using LNT and SCR components A method of reducing NOx in a vehicle exhaust operating by alternating exhaust flow between two lean NOx traps and directing the emerging exhaust to a downstream SCR catalyst system. While exhaust predominantly flows through one of the lean NOx traps, a reductant is... | 02/14/2012 |
| 8109078 | Method of operating a syngas generator A method of operating a syngas generator within a desired temperature range, despite a need for intermittent syngas output, involves switching between operating the syngas generator in a rich mode and a lean mode. Operation of the syngas generator in both the rich m... | 02/07/2012 |
| 8109079 | Apparatus, system, and method for controlling ammonia slip from an SCR catalyst Various embodiments of an apparatus, system, and method are disclosed for reducing NOx emissions on an SCR catalyst. For example, according to one representative embodiment, an apparatus for reducing NOx emissions in an engine exhaust includes ... | 02/07/2012 |
| 8109077 | Dual injector system for diesel emissions control The present invention provides methods and apparatus for injecting fluid, such as an aqueous urea solution, into an exhaust stream in order to reduce oxides of nitrogen (NOx) emissions from diesel engine exhaust. More particularly, the present invention provides a d... | 02/07/2012 |
| 8109080 | Method of controlling NOx purification system and NOx purification system In a NOx purification system 1 provided with a NOx occlusion reduction catalyst 20 and a control unit 30 which executes a NOx regeneration control and a sulfur poisoning regeneration control, a binary λ sensor 26 and a reducing agent con... | 02/07/2012 |
| 8109081 | Hydrocarbon selective catalytic reduction for NOx control with gasoline-fueled spark ignition engines using engine-out hydrocarbons A method for controlling hydrocarbon delivery to a hydrocarbon selective catalytic reduction device configured to receive an exhaust gas flow from an internal combustion engine includes monitoring measurable variable terms including factors affecting a conversion ef... | 02/07/2012 |
