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9145817 Reducing agent injection valve abnormality detection unit and reducing agent supply apparatus  
[Problem] To provide a reducing agent injection valve abnormality detection unit capable of precisely determining whether or not a reducing agent injection valve is abnormally stuck, and a...
9038370 Method for operating an exhaust emission control system having a SCR-catalyst and an upstream oxidation catalyst exhaust emission control component  
A method for operating an exhaust emission control system of a motor vehicle internal combustion engine, in the exhaust gas line of which an oxidation-catalytically active exhaust emission control...
9038369 Systems and methods for aftertreatment system diagnostics  
Methods and systems for diagnosing inadequate performance and/or degradation of one or more components of an aftertreatment system are disclosed, the components including at least an oxidation...
9032711 Exhaust purification system of internal combustion engine  
In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve and an exhaust purification catalyst are arranged. On the exhaust purification catalyst, platinum Pt...
9032719 Particulate filter performance monitoring  
A method for particulate filter performance monitoring in an exhaust gas treatment system is provided. The method includes monitoring a current received from a soot sensor in the exhaust gas...
9027539 Control apparatus for internal combustion engine  
The present invention intends to perform control for detecting a change in air-fuel ratio with high accuracy by an exhaust gas sensor in an internal combustion engine having a turbocharger with a...
9021791 Method for diagnosing a metering valve and device for carrying out the method  
A method for diagnosing a metering valve for metering a reagent into the exhaust gas region of an internal combustion engine. The metering valve is actuated by a pulse-width-modulated metering...
9016043 Exhaust treatment system with urea temperature rationality diagnostic  
A method for monitoring an exhaust after-treatment system that doses an exhaust treatment fluid held from a tank into an exhaust stream. The method includes determining a first temperature of the...
9010087 Method and system for NOx sensor degradation  
Various systems and method for detecting exhaust NOx sensor degradation are disclosed. In one example, degradation of the NOx sensor is indicated responsive to reductant injection in an exhaust...
9005558 Method and apparatus for exhaust gas control of an internal combustion engine  
An exhaust gas control apparatus for an internal combustion engine includes: a NOx purification catalyst arranged in an exhaust passage of the internal combustion engine; a degradation degree...
8997467 System and method for post-shutdown temperature management and purge  
A machine includes an engine having a coolant system, an electrical system, and an exhaust system. A diesel exhaust fluid (DEF) injector provides DEF into the exhaust system. The DEF injector...
8984861 Catalyst deterioration diagnosis method, method for purification of exhaust gas using the diagnosis method, catalyst deterioration diagnosis apparatus, and apparatus for purification of exhaust gas using the diagnosis apparatus  
A catalyst deterioration diagnosis method for diagnosing deterioration of a catalyst for purification of exhaust gas by using a test catalyst disposed in an exhaust gas flow path through which the...
8984868 Exhaust system having multiple dosers  
An exhaust system for a machine is disclosed. The exhaust system may have a diffuser configured to receive exhaust from an engine. The exhaust system may further have a plurality of dosers...
8978357 System and method for determining an exhaust system condition  
In one embodiment of the invention, a method for determining an exhaust system condition includes determining if a reaction in an oxidation catalyst is performing acceptably based on a determined...
8966882 Differential pressure-based enablement of a particulate filter diagnostic  
A vehicle includes an engine, an exhaust system having a particulate filter which removes soot from the exhaust stream, a sensor, and a controller. The sensor measures instantaneous differential...
8959892 Exhaust system having sensor placement detection  
An exhaust control system for use with a combustion engine is disclosed. The system may have an exhaust passage, an exhaust sensor located within the exhaust passage and configured to generate a...
8959891 Selective catalytic reduction system  
A selective catalytic reduction (SCR) system that can detect whether or not a float is stuck even where a water level sensor that detects a liquid level in a stepwise manner is used, including: an...
8959890 SCR thawing control system  
A selective catalytic reduction thawing control system that can distinguish between a thawing failure and a malfunction and can prevent a malfunction of a supply module (“SM”) pump. The thawing...
8955307 Exhaust gas purifying system for internal combustion engine  
In an ordinary mode, when an abnormality diagnosis of a PM sensor attached to a downstream opening downstream of a filter is performed, the PM sensor is moved to a first upstream opening upstream...
8943800 Air-fuel ratio control apparatus  
When an internal combustion engine (1) is determined to be in a low-temperature start state (an affirmative determination is made in S120), an air-fuel ratio control apparatus (10) controls the...
8943814 Warm-up system for exhaust system of internal combustion engine  
A warm-up system for an exhaust system of an internal combustion engine includes an electronic control unit that performs warm-up control for warming up an exhaust system component upon start-up...
8943799 Control device for internal combustion engine  
In a control device for an internal combustion engine including an air-fuel ratio sensor that includes a catalyst layer that covers an exhaust gas-side electrode, an oxygen storage capacity of the...
8938947 Catalyst degradation detection apparatus  
A catalyst degradation detection apparatus includes: calculation means for calculating, as an oxygen storage amount of a catalyst, an amount of oxygen stored into or desorbed from the catalyst...
8931264 Exhaust gas processing device for diesel engine  
An exhaust gas processing device for a diesel engine includes a DPF, a PM deposition amount estimating unit for PM deposited in the DPF, a DPF regenerating unit, a DPF regeneration control unit, a...
8932871 Ozone conversion sensors for an automobile  
A system for a vehicle includes a first ozone sensor that generates a first sensor signal indicating a first amount of ozone in air flowing into a radiator. A second ozone sensor generates a...
8925301 Vehicle and method for controlling catalyst device in temperature  
A vehicle includes: an engine; an EHC (electrically heated catalyst) electrically heated for purifying exhaust gas of the engine; a temperature sensor for sensing the temperature of the EHC; and...
8930121 Offset and slow response diagnostic methods for NOx sensors in vehicle exhaust treatment applications  
A method that includes in-vehicle systems and practices for determining whether a NOx sensor in an exhaust stream is performing properly.
8925299 Arrangement and method for operating an exhaust gas post-treatment device  
The invention relates to an arrangement (1) for operating an exhaust gas post-treatment device, particularly of a motor vehicle, wherein the arrangement (1) comprises a plurality of consumers...
8925300 Zero ceria washcoat catalyst monitor  
A catalyst degradation detection method for use with a zero ceria catalyst. The method uses techniques to measure transient responses to engine control events of upstream and downstream sensors to...
8919098 System and method for regenerating the particulate filter in a diesel engine  
In a diesel engine equipped with a system for automatic regeneration of a particulate filter, an automatic regeneration mode is inhibited in the case where there is recorded a number higher than a...
8915063 Method and device for estimating NOx emissions in combustion engines  
The present invention provides for a system for controlling NOx emissions based on the calculation of an error given by the difference between a first measured value obtained from a NOx sensor (7)...
8915062 Method and apparatus for monitoring a reductant injection system in an exhaust aftertreatment system  
An internal combustion engine operating at a lean air/fuel ratio includes a reductant injection system configured to dispense reductant into an exhaust gas feedstream upstream of a selective...
8918267 Control apparatus for internal combustion engine  
A control apparatus for an internal combustion engine is provided, the control apparatus being capable of effectively suppressing the inflow of fresh air into a catalyst due to an operational...
8904757 System and method for controlling regeneration within an after-treatment component of a compression-ignition engine  
Method for controlling regeneration within an after-treatment component of an engine comprises receiving an upstream temperature signal, receiving a downstream temperature signal, and calculating...
8904768 Adaptive desulfation and regeneration methods for lean NOx trap  
An adaptive method is used for LNT desulfation and regeneration. The desulfation method involves adapting the amount of sulfur loading to trigger a desulfation event in accordance with the current...
8904756 Exhaust emission control system of internal combustion engine  
An exhaust emission control system of an internal combustion engine includes: a bypass passage (22) provided in an exhaust passage (14) of the engine and arranged to bypass a main passage (16) as...
8899028 Particulate matter processing apparatus  
Aggregation of particulate matter is facilitated. Provision is made for an electrode that is arranged in an exhaust passage of an internal combustion engine with a voltage to be applied thereto...
8899015 Catalyst degradation detection device  
A catalyst degradation detection device, determines whether a three-way catalyst has degraded on the basis of the maximum value of the amount of oxygen stored by the catalyst. When determining...
8893482 System for determining sulfur storage of aftertreatment devices  
An exhaust gas treatment system for an internal combustion engine for determining a total amount of sulfur that is stored on at least one aftertreatment device is provided. The exhaust gas...
8893477 Exhaust emission purifying apparatus and liquid level measuring device  
The present invention provides an exhaust emission purifying apparatus having a liquid level measuring device in which, when a liquid level (measured liquid level) measured by a liquid level...
8893476 SCR closed loop control system  
A method for an exhaust after treatment system of an engine including at least one selective catalyst reaction (SCR), at least one clean up catalyst downstream from the SCR, a urea injector...
8893470 Method for preventing clogging of urea injection nozzle of SCR system  
In a method for preventing clogging of a urea injection nozzle in an after-run operation of a selective catalytic reduction (SCR) system which supplies urea stored in a urea tank through a supply...
8887492 Exhaust gas purification apparatus of an internal combustion engine  
In an exhaust gas purification apparatus of an internal combustion engine, there is provided a technique capable of suppressing a reduction in exhaust gas purification performance. The apparatus...
8875487 Exhaust purifying system for hybrid vehicle and control method therefor  
An exhaust purifying system includes: a catalytic device supplied with electric power from a power supply unit; a first connecting unit connecting one end of the catalytic device to a negative...
8869753 Effects of biodiesel fuel on fuel dilution of engine oil  
An engine and related control system determine an amount of fuel diluting the engine oil in the oil pan. Such information can be used to recommend an oil change and to estimate a fraction of...
8869515 Method for controlling pollutant emissions from a combustion engine  
The invention relates to a method for controlling a system for treating NOx in an exhaust line of an internal combustion engine, said system comprising means for introducing a reducing agent into...
8863504 System, method, and apparatus for determining aftertreatment fluid quality  
A method includes determining a first NOx conversion efficiency (η) value and determining that a diesel exhaust fluid (DEF) level has increased a threshold amount. Further, the method includes...
8863499 System for indicating quality of a diesel exhaust fluid (“DEF”)  
An exhaust gas treatment system for an internal combustion engine is provided having an exhaust gas conduit, a diesel exhaust fluid (“DEF”) source, a selective catalytic reduction (“SCR”) device,...
8863503 Exhaust purification system for internal combustion engine  
An exhaust purification system is provided that can appropriately grasp the NOx concentration or NH3 concentration on a downstream side of a selective reduction catalyst. A separation filter of...
8857161 Exhaust gas purification apparatus and exhaust gas purification method for an internal combustion engine  
A detection unit that is arranged in an exhaust passage of an internal combustion engine configured to detect a state of the exhaust gas, addition unit configured to add the additive agent into...