Patent
Exhaust emission purifying apparatus for engine
TLDR
In this paper, an exhaust emission purifying apparatus is provided with an electro-generative-heat carrier provided on an upstream side of an injection nozzle that supplies the reducing agent into the exhaust emission on upstream of a reduction catalyst in an exhaust pipe.Abstract:
In order to suppress deposition of constituent of a reducing agent (dissolved matter) in an exhaust passage of an engine enhancing an elimination rate of NOx even when temperature of an exhaust emission from the engine is low, an exhaust emission purifying apparatus is provided with an electro-generative-heat carrier provided on an upstream side of an injection nozzle that supplies the reducing agent into the exhaust emission on upstream side of a reduction catalyst in an exhaust pipe, the exhaust emission being heated to a temperature equal to or higher than a melting point of the dissolved matter whereby deposition of the dissolved matter on an inner wall surface of the exhaust pipe is suppressed to effectively use the supplied reducing agent for catalytic reduction reaction, even when the exhaust emission temperature is lower than the melting point of the dissolved matter of the reducing agent.read more
Citations
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Patent
Exhaust purification system of internal combustion engine
TL;DR: In this article, the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (13) is made a second target air fuel ratio which is smaller than the first target rich airfuel ratio by switching from the second NOX removal method to the first NO X removal method.
Patent
Exhaust emission control device
TL;DR: In this article, an exhaust emission control device which eliminates the use of a heat-retention structure using heat-insulating material such as glass wool so as to attain substantial lessening in production cost is presented.
Patent
Integrated scr and amox catalyst systems
TL;DR: In this article, a method for preparing a catalyst system includes: first coating one end of a substrate along at least 5% of its length with an undercoat washcoat layer containing a material composition effective to catalyze the removal of ammonia; second coating with an overcoat layer consisting of an additional material composition that catalyzes the conversion of a mixture of NOx and NH3 to N2.
Patent
Exhaust Emission Purifying Apparatus for Engine
TL;DR: In this article, a dosing flow rate of the liquid reducing agent according to engine operating conditions is computed, and the dosing of the LSA is controlled based on the computed dosing rate, and also, it is judged whether or not a supply system of the LISA is failed, based on a ratio between an integrated amount obtained by sequentially integrating the DSA flow rate and a consumed amount of LSA.
Patent
Mixing device in an exhaust gas pipe
Michel Vanvolsem,Julien Ampere +1 more
TL;DR: In this paper, a mixing device has a first portion located on the injection inlet side of the pipe and a second portion located opposite the injector side of pipe, the portions being designed so that the fluid velocity is higher downstream from the mixing device second portion than downstream from mixing device first portion.
References
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Patent
Exhaust gas aftertreatment systems
TL;DR: In this paper, a method for estimating an amount of ammonia stored in a urea-based SCR catalyst based on a dynamic model of the catalyst is presented, and the estimated ammonia storage amount is then used to control the amount of reductant injected into the catalyst to maintain desired ammonia storage amounts such that maximum NOx conversion efficiency and minimum ammonia slip are achieved.
Patent
Method and device for introducing liquid into an exhaust-gas purification system
TL;DR: In this paper, a method and a device for introducing liquid into an exhaust-gas purification system according to the invention avoids frost damage to sections of the system during shutdown times and permits operation at temperatures below the freezing point of the reducing agent solution being used.
Patent
NOx emission-control system using a virtual sensor
TL;DR: In this paper, a method and system may be provided to perform a process for controlling NO x emissions of an target engine, which may include determining predicted NO x values based on a model reflecting a predetermined relationship between control parameters and NOx emissions, wherein the control parameters include ambient humidity, manifold pressure, manifold temperature, fuel rate, and engine speed associated with the engine.
Patent
Diesel aftertreatment systems
TL;DR: In this paper, an accurate thermodynamic model of an active lean NOx (ALNC) Catalyst is presented, which takes into account hydrocarbon storage and release mechanisms of ALNC, as well as the degradation in the ALNC hydrocarbon conversion efficiency due to ageing, and thus provides a more accurate estimate of an exotherm generated by hydrocarbon combustion.
Patent
Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines
TL;DR: In this article, a diesel engine aftertreatment exhaust system uses catalyzed soot filters for particulate matter reduction and urea SCR catalysts for NOx reduction on diesel engines in a combined system to lower particulate matters and NOx at the same time.
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