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US20050252197 Diesel aftertreatment systems  
An accurate thermodynamic model of an Active Lean NOx (ALNC) Catalyst is presented. The model takes into account hydrocarbon storage and release mechanisms of the ALNC, as well as the degradation...
US20070266697 Exhaust emission purifying apparatus for engine  
A technology for purifying an exhaust emission from an engine is provided, in which a misjudgment caused by a time lag between the abnormality detection and an abnormality judgment is avoided, in...
US20050262827 Electronic engine control device, vehicle equipped with electronic engine control device, and electronic engine control method  
On the premise that a target torque of an engine is equal to 0, that observed catalyst temperature is in a specified temperature range causing deterioration of the catalyst, and that the engine...
US20050039446 Apparatus for purifying exhaust gas of internal combustion engine  
In an apparatus for purifying exhaust gas of an engine, both upstream and downstream catalysts are disposed in an exhaust pipe in series. The upstream catalyst is divided into upstream and...
US20050060986 Evaluating method for no eliminating catalyst, an evaluating apparatus therefor, and an efficiency controlling method therefor  
In order to prevent a catalyst for an internal combustion engine from decreasing efficiency by deterioration after long time use of the catalyst, the decreased efficiency of the catalyst is...
US20080282682 Integrated DPF loading and failure sensor  
An integrated DPF loading and failure sensor with two particulate matter sensors one located upstream of the filter and the other located downstream of the filter. The sensors are integrated into...
US20060059895 Method for operating an internal combustion engine  
A method for operating an internal combustion engine includes the step of measuring emission values of at least two pollutant components of an exhaust gas of an internal combustion engine. A value...
US20100101214 DIAGNOSTIC METHODS FOR SELECTIVE CATALYTIC REDUCTION (SCR) EXHAUST TREATMENT SYSTEM  
In an internal combustion engine system having an exhaust aftertreatment system including a selective catalytic reduction (SCR) catalyst, diagnostic methods involve the intrusive perturbation of a...
US20070289287 Abnormality diagnosing device for internal combustion engine and abnormality diagnosing method therefor  
A temperature of a catalyst disposed in an exhaust system is raised to a target bed temperature by supplying an unburned fuel component to the catalyst. A learned value is updated based upon a...
US20090199543 CATALYST MONITORING SYSTEM AND MONITORING METHOD  
A catalyst monitoring system diagnoses deterioration of an NOX catalyst (18) which is arranged in an exhaust passage (12) of an internal combustion engine (10). An NOX sensor (25) is arranged...
US20090044515 SYSTEM AND METHOD FOR REMOVING PARTICULATE MATTER FROM A DIESEL PARTICULATE FILTER  
A system is provided for removing particulate matter from a diesel particulate filter. The diesel particulate filter includes at least one diesel particulate filter unit to filter particulate...
US20070234708 Method of on-board diagnostic catalyst monitoring  
A method of on-board diagnostic (OBD) catalyst monitoring. Vehicle OBD exhaust systems often include a catalyst, a pre-catalyst exhaust gas oxygen sensor, and a post-catalyst exhaust gas oxygen...
US20140250865 EXHAUST GAS AFTERTREATMENT BYPASS SYSTEM AND METHODS  
A method for protecting an exhaust aftertreatment system of an internal combustion engine from deterioration by selectively diverting exhaust gasses from the engine away from a component of the...
US20130283767 OXIDATION CATALYST MONITORING  
A control method for monitoring an oxidation catalyst of an exhaust system is provided. The control method includes determining an open loop factor based on an aging factor and an efficiency...
US20120023910 Particulate Filter Regeneration Control System and Method  
Systems and methods for controlling regeneration of a diesel particulate filter in a vehicle engine exhaust include detecting a distance of an object from the exhaust and controlling a...
US20060101808 Engine self-diagnosis system  
An engine self-diagnosis system capable of performing diagnosis of the light-off performance of a catalyst at a low cost and high accuracy without requiring addition or improvement of a sensor,...
US20110061368 PARTICULATE MATTER SENSOR AND EXHAUST GAS PURIFYING APPARATUS  
A particulate matter sensor includes a detection filter, a differential pressure detecting unit, an on-off valve, and a valve control unit. The detection filter is installed in an exhaust passage...
US20100031632 CATALYST DETERIORATION DETERMINATION DEVICE AND METHOD, AND ENGINE CONTROL UNIT  
A catalyst deterioration determination device capable of determining whether or not fuel is high-sulfur fuel containing much sulfur content, and properly determining whether a catalyst is...
US20090301062 EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE  
An exhaust emission control device for an internal combustion engine includes a capturing device that is disposed in an exhaust passage of the engine and that captures particulate matter in...
US20090266054 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...
US20090145111 PROBLEM DETECTION APPARATUS AND METHOD IN EXHAUST PURIFYING APPARATUS  
An exhaust purifying apparatus is provided with a filter located in an exhaust path of an internal combustion engine and configured to collect particulates in exhaust gas. The exhaust purifying...
US20060218895 Method for operating an internal combustion engine and device for executing the method  
A method for operating an internal combustion engine and a device for executing the method provide for diagnostics of the exhaust system in which an exhaust-gas treatment device for converting at...
US20090139210 Gas concentration sensor drift and failure detection system  
A system for detecting when a gas concentration sensor has drifted or failed is disclosed. The system has a first gas concentration sensor configured to detect a first gas concentration and...
US20130318948 SOOT SENSOR FUNCTIONAL CAPABILITY MONITORING  
A method of monitoring functional capability of a soot sensor that is responsive to deposition of soot from an exhaust gas stream on a sensor surface comprises acquiring a measurement signal of...
US20090139212 DIAGNOSTIC DEVICE FOR NOx SENSOR  
The ECU performs an on-board diagnosis for a NOx sensor. The diagnosis is carried out when an exhaust system of an engine is fully cooled after shut-down of the engine. The diagnosis is carried...
US20080173008 Catalyst deterioration detecting system and catalyst deterioration detecting method of internal combustion engine  
A catalyst deterioration detecting system of an internal combustion engine includes a measuring unit that measures the oxygen storage capacity of a catalyst, a detector that detects or estimates...
US20050210868 Method for sensing exhaust gas for OBD  
All of NOx, PM, HC and CO concentrations necessary for realization of OBD are determined by utilization of an in-vehicle existing NOx sensor. A NOx sensor arranged in an exhaust pipe detects the...
US20110000193 SYSTEM AND METHOD FOR DETECTING DIESEL PARTICULATE FILTER CONDITIONS BASED ON THERMAL RESPONSE THEREOF  
Systems and methods to determine conditions of a diesel particulate filter (DPF) based on correlation between predicted and actual thermal data of the fluid exiting a DPF are provided. Soot...
US20110225954 SENSOR FOR EXHAUST GAS PURIFYING APPARATUS  
A sensor for an exhaust gas purifying apparatus includes an examining filter and a holding member. The examining filter is provided in a secondary exhaust line diverging from a primary exhaust...
US20090145109 Catalyst degradation diagnosis device and diagnosis method for internal combustion engine  
The oxygen storage capacity preceding a previous oxygen storage capacity and the previous oxygen storage capacity of each of an upstream catalyst and a downstream catalyst are measured, and a...
US20130055700 SELECTIVE CATALYTIC REDUCTION SYSTEM  
A selective catalytic reduction system includes a urea aqueous solution tank to retain a urea aqueous solution to be injected into an exhaust pipe of an engine, a level sensor to detect a solution...
US20100031634 DETERIORATION DETERMINATION DEVICE AND METHOD FOR EXHAUST EMISSION REDUCTION DEVICE, AND ENGINE CONTROL UNIT  
A deterioration determination device for an exhaust emission reduction device which is capable of accurately and rapidly determining deterioration of a NOx purifying catalyst. The deterioration...
US20070220862 Deterioration detecting apparatus for catalyst  
A deterioration detecting method for a catalyst in an exhaust system of an internal combustion engine for purifying exhaust gases. The system includes a first oxygen concentration sensor and a...
US20090288391 CATALYST DETERIORATION DETECTION DEVICE  
The present invention detects the deterioration of a catalyst. In accordance with an output from an oxygen sensor, a catalyst deterioration detection device for the catalyst positioned in an...
US20100175370 DEVICE AND METHOD FOR REGENERATING PARTICULATE FILTERS, USE OF A MEDIUM FOR REGENERATING PARTICULATE FILTERS, AND REFILL PACK COMPRISING SAID WITH THE MEDIUM  
The invention relates to the use of a combustion fuel that differs from diesel or diesel cleavage products, in particular monoethylene glycol and/or methanol, for enriching exhaust gas in front of...
US20080264037 Apparatus for deterioration diagnosis of an oxidizing catalyst  
An unburned fuel supply section performs temperature rise control to supply fuel to an oxidizing catalyst disposed upstream of an exhaust purification device to cause temperature rise of the...
US20100083635 CATALYST MONITORING SYSTEM AND CATALYST MONITORING METHOD  
The concentration of a portion of components in the hydrocarbon in exhaust gas flowing into a catalyst is detected or estimated, and the concentration of the portion of components in the...
US20060218896 Motor vehicle and control method of motor vehicle  
In a hybrid vehicle of the invention, in the event of specification that an exhaust treatment catalyst is in a preset adequate state at step S112, combustion control of an engine starts after a...
US20110035136 CONTROL DEVICE AND CONTROL METHOD FOR VEHICLE  
An engine ECU executes a program including: a step of estimating the occluded amount of NOx if an engine is self-rotating and a catalyst temperature is equal to or higher than a predetermined...
US20090133385 EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE, AND CONTROL METHOD THEREOF  
An exhaust purification device includes a particulate filter (10), an air flow meter (7) that detects the amount of fresh air flowing in an intake passageway (3), and an EGR device (30) that...
US20070017212 Catalyst diagnosis apparatus for internal combustion engine  
A catalyst diagnosis apparatus comprises a reaction rate calculation unit for calculating a reaction rate of chemical reaction in a three-way catalyst based on an output of an oxygen sensor, and...
US20100199638 APPARATUS FOR DIAGNOSING DETERIORATION OF NOX ABSORPTION-REDUCTION CATALYST  
An apparatus for diagnosing deterioration of a NOx absorption-reduction catalyst provided at an exhaust path of an engine includes a sensor disposed upstream of the catalyst to sense a NOx...
US20160084184 EXHAUST SYSTEM HAVING AFTERTREATMENT REGENERATION CYCLE CONTROL  
An exhaust system for an engine is provided that may have an exhaust passage configured to direct exhaust from the engine to the atmosphere. The exhaust system may also have an aftertreatment...
US20150020504 EXHAUST FLOW ESTIMATION  
The present technology provides systems for monitoring particulate matter buildup on a filter installed in the engine exhaust stream of a vehicle. A filter differential pressure sensor monitors a...
US20100242443 EXHAUST AFTERTREATMENT DEVICE  
When an estimated value (A value) of an accumulation amount in a filter for trapping particulate matter reaches a prescribed value A1 corresponding to a prescribed accumulation amount Qm of the...
US20120204537 Adaptive diesel particulate filter regeneration control and method  
An after-treatment device that includes a diesel particulate filter (DPF) requiring periodic regeneration includes a sensor providing a signal indicative of a soot accumulation and at least one...
US20120023911 DETECTION OF EXHAUST PARTICULATE FILTER SUBSTRATE FAILURE  
A method of detecting failure of a substrate in a particulate filter includes comparing an absolute value of a difference between a theoretical temperature difference and an actual temperature...
US20090205318 FAULT DETECTION SYSTEM FOR PM TRAPPER  
An object of the present invention is to provide a technology that enables to detect a fault of a PM trapper with improved accuracy. According to the present invention, a plurality of temperature...
US20090151437 Exhaust gas oxygen sensor monitoring  
An internal combustion engine includes an exhaust system, an oxygen sensor in the exhaust system and a sensor malfunction monitor. The sensor malfunction monitor measures a rate of change of a...
US20120210700 METHOD TO MONITOR PRESSURE DROP ACROSS A SELECTIVE CATALYST REDUCER FOR ENGINE AND EXHAUST AIRFLOW DIAGNOSTICS  
A method to diagnose exhaust system malfunction in an electronically controlled internal combustion engine having an exhaust system and including a Selective Catalyst Reducer (SCR) is disclosed....

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