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7673444 Exhaust gas purification apparatus  
An exhaust gas purification apparatus includes an NOx reduction catalytic converter disposed in an engine exhaust passage to reductively purify NOx in exhaust gas using ammonia or its precursor as...
7673446 Dual path exhaust emission control system  
An exhaust emission control system for an internal combustion engine is disclosed. The exhaust emission control system has a first passageway and a second passageway disposed to receive exhaust in...
7673443 Method and a device for providing lambda control in an internal combustion engine  
Method for lambda control in an internal combustion engine with a catalytic converter in an exhaust tract and at least one lambda probe mounted inside the catalytic converter. With this arrangement...
7661264 Air-fuel ratio control apparatus for internal combustion engine  
An air-fuel ratio control apparatus for an internal combustion engine, including fuel cut state detection means for detecting the state of fuel cut in which the feed of fuel into the internal...
7658064 Exhaust gas purifying apparatus  
An exhaust gas purifying apparatus includes a primary diesel particulate filter provided in an exhaust line of a diesel engine, a secondary exhaust line branched from the exhaust line at an...
7654076 System for controlling absorber regeneration  
A system, method, and software for controlling regeneration and desulfurization of a NO x adsorber is disclosed. An electronic control unit is connected with an engine for selectively controlling...
7654077 Method for controlling an operation of a heatable exhaust-gas sensor of a motor vehicle  
A method is for controlling the operation of an exhaust-gas sensor disposed in an exhaust duct of a motor vehicle and equipped with an internal or external sensor heating device, the motor vehicle...
7644576 Sensor control device  
A sensor control device is connected with a plurality of exhaust sensors including an NOx sensor to be disposed around a catalyst, and is constructed such that a plurality of drive control circuits...
7640729 Method for operating a particulate filter situated in the exhaust gas area of an internal combustion engine and device for carrying out the method  
A method for operating a particulate filter situated in an exhaust gas area of an internal combustion engine and a device for carrying out the method are described. A measure of the particulate...
7634905 Method for operating an internal combustion engine and device for implementing the method  
A method for operating an internal combustion engine and a device for implementing the method, in which a diagnosis is performed of an adjusting device situated in the exhaust duct of the internal...
7635593 In-line localized monitoring of catalyst activity in selective catalytic NOx reduction systems  
Localized catalyst activity in an SCR unit for controlling emissions from a boiler, power plant, or any facility that generates NO x -containing flue gases is monitored by one or more modules that...
7628007 Onboard diagnostics for anomalous cylinder behavior  
Method and system of onboard diagnostics in engine emissions monitoring, particularly for detecting anomalous cylinder behavior. In some embodiments, at least one sensor in the exhaust path...
7618255 Apparatus and method for catalytic combustion  
A catalytic combustion apparatus is equipped with a reactor for catalytically burning a gas to be treated containing a combustible organic compound, which further comprises a condensate forming...
7618605 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 a NOx catalyst, thereby reducing exhaust emission and...
7614392 Diagnostic method and control apparatus for gas sensor  
A gas sensor diagnostic method includes: a fuel supply detecting step of detecting an interruption of a fuel supply to the internal combustion engine, and a restart of the fuel supply after the...
7610753 Exhaust gas purification apparatus for internal combustion engine and method thereof  
According to the present invention, there is disposed in an exhaust passage of an internal combustion engine a filter that traps particulate matter In an exhaust gas, and a catalyst with a...
7610748 Mounting structure for an air-fuel ratio sensor in a motorcycle, and exhaust subassembly including same  
A mounting structure is provided for an air-fuel ratio sensor on an exhaust pipe in a motorcycle in which a concentration of oxygen in an exhaust gas can be detected efficiently and accurately by...
7603845 Method and device for managing the operation of a nitrogen oxide trap, and diagnosing its ageing condition  
The invention concerns a method which consists in arranging a oxygen probe ( 21 ) of an exhaust pipe and observing that substantial unique increase of said representative signal towards a threshold...
7603846 Method for operating an internal combustion engine and a device for carrying out the method  
A method for operating an internal combustion engine whose exhaust area has at least one SCR catalytic converter and a device for carrying out the method are described. The SCR catalytic converter...
7603847 Device and method for internal combustion engine control  
A system for an engine is shown that includes an upstream emission control device and a downstream emission control device. The upstream device has a washcoat having a predetermined amount of...
7596941 Air-fuel ratio control device for internal combustion engine  
An air-fuel ratio control device for an internal combustion engine can detect the deteriorated purification state of a catalyst without delay after completion of rich or lean control, and can...
7594392 System for controlling adsorber regeneration  
A system, method, and software for regenerating an adsorber connected with a flow of exhaust from an engine. An open-loop control module for ramping up and maintaining a temperature value of an...
7591986 Exhaust emission control device and method for internal combustion engine, and engine control unit  
An exhaust emission control device which is capable of supplying a just enough amount of reducing agent to a NOx catalyst while causing the amount of reducing agent consumed in an upstream catalyst...
7591132 Apparatus and method to inject a reductant into an exhaust gas feedstream  
An exhaust aftertreatment system for an internal combustion engine is provided including an apparatus and method to inject a reductant into the exhaust gas feedstream. Included is a fuel metering...
7587891 Method for regenerating NOx absorbing catalyst  
A method for regenerating a NOx absorbing catalyst includes: detecting a NOx value by a NOx sensor and determining whether to perform a regeneration mode or not based on a comparison of the sensed...
7587892 Apparatus, system, and method for adapting a filter regeneration profile  
An apparatus, system, and method are disclosed for adapting a regeneration profile for a particulate filter. A controller's input module receives inputs relating to conditions of the filter or...
7581390 Method and system for improving sensor accuracy  
A method and system for improving sensor accuracy of diesel emissions is disclosed. The method and system comprises changing the sensor reading as a function of sensor age to provide a more...
7581535 Method of estimating the fuel/air ratio in a cylinder of an internal-combustion engine by means of an extended Kalman filter  
The present invention relates to a method of estimating the fuel/air ratio in each cylinder of an injection internal-combustion engine comprising an exhaust circuit on which a detector measures the...
7571601 Method and apparatus for controlling regeneration of simultaneous NOx-PM reduction device  
The present invention provides a method for controlling regeneration of the simultaneous NOx-PM reduction apparatus having a lean NOx trap (LNT) for removing nitrogen oxide (NOx) an engine and a...
7568337 Device for detecting state of thermal degradation of exhaust purifying catalyst  
An electronic controller integrates a rate of progress dK of thermal degradation of exhaust purifying catalyst at every predetermined time period, to calculate degree of thermal degradation K of...
7565799 Controlling lean NOx trap (LNT) catalyst performance  
A method of using a lean NOx trap (LNT) catalyst to control vehicle engine emissions. While catalyst temperature is within a low range, the catalyst is allowed to store NOx until the catalyst is...
7559193 Control apparatus and method for internal combustion engine  
A control apparatus for an internal combustion engine has an oxygen storage volume computing unit for computing an oxygen storage volume of a catalyst by using a real air/fuel ratio detected by an...
7559194 Method and device for controlling the injection of reducing agent  
The invention relates to a method and device ( 10 ) for controlling the injection of reducing agent upstream from a catalyst ( 4 ) in an exhaust line ( 2 ) from a combustion engine. According to...
7555895 Exhaust gas purifying apparatus and method for internal combustion engine  
In exhaust gas purifying apparatus and method for an internal combustion engine, an abnormality determination of an NOx (Nitrogen Oxides) removing catalyst is executed on the basis of output values...
7552586 Marine exhaust system with a downstream oxygen sensor located away from a water reversion liquid trajectory path  
A marine engine exhaust system has an oxygen sensor located within a catalyst housing structure and downstream from a catalyst device. The oxygen sensor is located away from a reversion liquid...
7549283 Engine system with mixed exhaust gas oxygen sensor types  
In one example, a system for a vehicle traveling on the road is described. The system includes a first cylinder; a second cylinder; a linear exhaust gas sensor coupled exclusively to said first...
7543443 Method for determining NOx reduction ratio in exhaust emission control device  
When urea water U is injected by an addition nozzle 7 upstream of NO x reduction catalyst 6 incorporated in an exhaust passage 5 of a diesel engine 1 so as to reduce and purify NO x in...
7536851 Catalyst condition monitor based on differential area under the oxygen sensors curve algorithm  
A control system and method of monitoring a condition of a catalyst in a catalytic converter includes commanding a first air/fuel ratio. A first signal is monitored from a first oxygen sensor and a...
7533519 Three sensor comparison rationality test  
Testing of temperature sensors ( 28, 30, 32 ) in an emission control system, such as in an exhaust system ( 10 ) of a diesel engine, serves to condition further component and/or system testing by...
7530220 Control strategy for reducing fuel consumption penalty due to NOx adsorber regeneration  
A method for enabling initiation of regeneration of a NOx adsorber catalyst. While the engine is operating to propel the vehicle, data indicative of NOx adsorption efficiency of the NOx adsorber...
7526914 Heater control device for gas sensor  
An oxygen concentration sensor including the sensor element for detecting oxygen concentration in the exhaust gas and the heater for heating the sensor element is installed at the location...
7520274 Air fuel ratio sensor deterioration determination system for compression ignition internal combustion engine  
In a compression ignition internal combustion engine provided with an NOx storage-reduction catalyst on an exhaust system, when the air fuel ratio of the exhaust gas being in a lean state is...
7513105 Exhaust gas purifying system and abnormality determining method therefor  
An exhaust gas purifying system includes a catalyst arranged on an exhaust pipe of an internal combustion engine; a sensor detecting a state of the exhaust gas passed through the catalyst; and an...
7500358 Apparatus, system, and method for enhancing soot filter protection  
An apparatus, system, and method are disclosed for enhancing protection of a soot filter. The method enhances soot filter protection by interpreting a baseline regeneration scheme, estimating...
7499789 Deterioration signal generation device for gas sensor  
A deterioration signal generation device for a gas sensor for simulating a deterioration signal output by a gas sensor in a deteriorated state, the gas sensor detecting the fuel-air ratio of...
7490463 Process and system for removing soot from particulate filters of vehicle exhaust systems  
A motor vehicle exhaust aftertreatment system includes an exhaust conduit that includes a NO x adsorber, a particulate filter, a reformer for generating reformate containing hydrogen and carbon...
7478528 Oxygen based particulate filter regeneration strategy  
A particulate filter regeneration method for an internal combustion engine system is provided. The method includes: receiving an outlet temperature signal corresponding to a temperature at an...
7475536 Exhaust gas purifying apparatus for internal combustion engine  
An exhaust gas purifying apparatus for an internal combustion engine having an exhaust system. The apparatus includes a NOx purifying device provided in the exhaust system. This device removes NOx...
7474956 Air-fuel ratio control system of internal combustion engine  
An air-fuel ratio control system maintaining constant an oxygen storage amount or oxygen release amount per unit time with respect to an exhaust purification catalyst having an oxygen storage...
7472697 Air-fuel ratio control apparatus  
An air-fuel ratio control apparatus is applied to an internal combustion engine including a variable lift mechanism which changes a lift amount of an intake valve. An oxygen sensor, which outputs a...