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Power Plants > Internal Combustion Engine With Treatment Or Handling Of Exhaust Gas > Having Sensor Or Indicator Of Malfunction, Unsafeness, Or Disarray Of Treater (e.g., Fusible Link, Etc.) Having Sensor Or Indicator Of Malfunction, Unsafeness, Or Disarray Of Treater (e.g., Fusible Link, Etc.)Having Sensor Or Indicator Of Malfunction, Unsafeness, Or Disarray Of Treater (e.g., Fusible Link, Etc.) patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.11/22/07 - 20070266697 - 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 the case where a plurality of abnormalities is judged on the aqueous solution of a reducing agent or ... 11/15/07 - 20070261390 - Deterioration diagnostic system of exhaust gas purifying catalyst A deterioration diagnostic system of an exhaust gas purifying catalyst includes: an upstream side switching frequency calculator calculating the number of times of switching on the upstream side; a reference value calculator calculating a downstream side rich/lean determination level having a first width; a downstream side rich/lean determination level adjuster ... 11/01/07 - 20070251214 - Apparatus for detecting a state of a particulate filter A particulate filter is provided in an exhaust system of the engine. Parameter values correlated with a flow amount of exhaust gas of the engine are determined, and differential pressure between upstream and downstream sides of the particulate filter is determined. The ratio of a variation rate of the parameter ... 11/01/07 - 20070251213 - Scheme for detecting deterioration of a catalyst in an engine Deterioration of a catalyst provided in an exhaust system of the engine is determined. Air-fuel ratio sensors are provided in the upstream side and the downstream side of the catalyst. Air-fuel ratio is changed. Based on the sensor outputs in the upstream die and the downstream side of the catalyst, ... 10/25/07 - 20070245715 - Efficiency improving device for a gasoline engine An efficiency improving device includes a phase compensating circuit, a filter circuit, a first diode in a forward direction, and a second diode in a reverse direction; the phase compensating circuit includes two wires, and several parallel capacitors connected to the wires; the wires are connected to the battery of ... 07/26/07 - 20070169466 - Regenaration controller for exhaust purification apparatus of internal combustion engine A regeneration controller for preventing a large amount of particulate matter from being suddenly burned without increasing the frequency a heating process is performed. The regeneration controller includes an ECU(70) for heating an exhaust purification apparatus to eliminate the particulate matter accumulated in the exhaust purification apparatus when an estimated ... 07/19/07 - 20070163233 - Apparatus for sensing particulates in a gas flow stream A particulate sensor for sensing the presence of particulates in a gas flow stream is disclosed. The particulate sensor includes a housing having a flow divider to provide a first flow path and a second flow path. A heater is disposed and configured to provide uniform heating of the two ... 06/28/07 - 20070144146 - Exhaust gas purification device of internal combustion engine An ECU performs exhaust temperature control based on output values of multiple exhaust temperature sensors provided upstream and downstream of a particulate filter provided in an exhaust passage of an engine. The ECU calculates a change speed deviation value by subtracting change speed of outlet side exhaust temperature, which is ... 06/28/07 - 20070144145 - Diagnostic apparatus and diagnostic method for an internal combustion engine A diagnostic apparatus for an internal combustion engine is disclosed herein. In one embodiment, the diagnostic apparatus comprises a catalytic converter and a controller. The catalytic converter is disposed in an exhaust passage of an engine and treats an exhaust gas component in the exhaust gas. The controller is adapted ... 06/28/07 - 20070144144 - Exhaust gas purifying system for internal combustion engine An ECU controls a rich purge in the internal combustion engine by temporarily changing an air/fuel ratio of the exhaust gas into a rich range to deoxidize and remove absorbed NOx, which is absorbed by an NOx storage and reduction catalyst of an NOx catalytic converter. The ECU changes a ... 06/28/07 - 20070144143 - Exhaust gas purification apparatus, exhaust gas purification method, and sulfur component trapping agent for internal combustion engine An exhaust gas purification apparatus for an internal combustion engine, which comprises an exhaust gas passage for an internal combustion engine into which exhaust gas of lean air fuel ratio and rich or stoichiometric air fuel ratio flows, a NOx trapping catalyst that functions to trap NOx in the exhaust ... 06/21/07 - 20070137178 - Procedure to measure the oxygen storage capability of an emission control system The invention concerns a procedure to determine the oxygen storage capability of an emission control system with an exhaust gas sensor with discrete-level ability disposed in front of the emission control system. If in a period of time before the determination of the oxygen storage capability, the control intervention of ... 06/21/07 - 20070137177 - 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 measures electric charge that is indicative of particulate matter. In some embodiments, at least one sensor measures oxides of nitrogen. The indications of ... 06/07/07 - 20070125067 - Exhaust system An exhaust gas passageway of an internal combustion engine is basically provided with a main exhaust passageway, a bypass exhaust passageway, a bypass catalytic converter provided in the bypass exhaust passageway, a bypass control valve, an upstream air-fuel ratio sensor and a downstream air-fuel ratio sensor. The bypass exhaust passageway ... 05/10/07 - 20070101697 - Exhaust emission control device for internal combustion engine A method is disclosed for estimating an amount of deposited particulates (PM) in a collector of an internal combustion engine. The method includes estimating the amount of inflow of PM into the collector and estimating a basic amount of decreased PM that flows into the collector and is burned and ... 05/03/07 - 20070095051 - 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 air/fuel ratio sensor installed on the upstream side of a catalyst, a center air/fuel ratio representing a ... 05/03/07 - 20070095050 - Apparatus and method for diagnosing deterioration of catalyst, and catalytic converter apparatus for exhaust emission of engine An apparatus for diagnosing deterioration of a catalyst for an internal combustion engine, having a first catalyst and a second catalyst and provided with sensors for detecting a particular exhaust component before and after the first catalyst, wherein a relationship between a deterioration property involved in clarification of an exhaust ... 04/26/07 - 20070089398 - Method and device for detecting deterioration of catalyst During deterioration detection of a catalyst, exhaust gas of a lean air/fuel ratio and exhaust gas of a rich air/fuel ratio are alternately supplied to the catalyst, and decrease of the O2 storage function is detected by obtaining the oxygen occlusion amount in the catalyst, based upon the timing at ... 04/12/07 - 20070079597 - System and method for monitoring operation of an exhaust gas treatment system A system and a method for monitoring operation of an exhaust gas treatment system using an exhaust gas sensor in accordance with an exemplary embodiment is provided. The exhaust gas treatment system has an exhaust pipe configured to receive exhaust gases. The exhaust gas treatment system has an SCR catalyst ... 03/29/07 - 20070068140 - System and method for monitoring the efficiency of a catalyst treating engine exhaust A method for monitoring the efficiency of a catalyst includes providing an oxygen sensor between an engine and the catalyst to generate an output signal indicative of oxygen content. The output signal is sampled to provide a first value indicative of the oxygen content of untreated exhaust. The exhaust is ... 03/29/07 - 20070068139 - Exhaust treatment system diagnostic via ammonium nitrite decomposition A method of monitoring operation of an exhaust treatment system of a diesel engine includes injecting a dosing agent into an exhaust and monitoring the operating conditions of an engine during normal driving conditions. A control module monitors inlet and outlet temperatures of a catalyst and compares the inlet temperature ... 03/22/07 - 20070062177 - Apparatus for evaluating deterioration condition of catalyst of internal combustion engine To provide an apparatus for evaluating the deterioration condition of a catalyst of an internal combustion engine that can improve the accuracy of an evaluation of the deterioration condition of a catalyst and can suppress a worsening of emissions. The apparatus forcedly sets the air/fuel ratio upstream of a catalyst ... 03/15/07 - 20070056265 - System for providing assistance in regenerating depollution means integrated in an exhaust line of a vehicle diesel engine This system, in which the depollution means (1) are associated with oxidation catalyst-forming means (2), and the engine (4) is associated with common rail means (7) for feeding it with fuel and adapted to implement a regeneration strategy using at least one post-injection of fuel into the cylinders, is characterized ... 03/08/07 - 20070051094 - Hc adsorbing material and device for judging deterioration of the hc adsorbing material A HC adsorbing material whose deterioration can be judged with high accuracy and reliability. The HC adsorbing material contains a zeolite having cation adsorption sites (Al sites) to which are bonded ions of an element (Ce+) that exhibits oxygen storage capacity (OSC) in a nonionic state (when present as an ... 03/08/07 - 20070051093 - Control apparatus and control method for internal combustion engine provided with secondary air supply An ECU executes a program including a step (S102) of limiting the maximum opening amount of a throttle valve to TH (1) when failure has occurred in a pressure sensor (“YES” in step S100); a step (S202) of limiting the maximum opening amount to TH (2) when open failure has ... 02/22/07 - 20070039313 - Secondary airflow system for engine exhaust emission diagnostics In one example, a system for an engine having an intake system and an exhaust system is described. The system comprises: an airflow sensor coupled to the intake system; an air pump having at least an inlet side and an outlet side, said inlet side having a first coupling to ... 02/22/07 - 20070039312 - Secondary air supply system and abnormality detection method for secondary air supply system During secondary air supply control, a secondary air supply system which supplies secondary air to an upstream side of an exhaust gas control apparatus obtains a secondary air flow rate supplied to an exhaust passage provided independently for each of a plurality of cylinder groups, and detects an abnormality in ... 02/08/07 - 20070028596 - Diagnostic equipment for an exhaust gas cleaning apparatus A diagnostic equipment for an exhaust gas cleaning apparatus installed for an engine, comprising a misfire detector which detects the misfire of the engine, and a secondary-air-system failure detector which detects the failure of a secondary air system. An index corrector corrects a deterioration index calculated by a deterioration-index calculator, ... 01/25/07 - 20070017212 - 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 an OSC indicator calculation unit for calculating an OSC indicator indicating an oxygen storage capacity (OSC) of the three-way ... 01/11/07 - 20070006570 - Method of operating a system comprising a diesel engine and catalyst for exhaust gas purification The invention relates to a method and an apparatus of operating a drive system comprising an engine and an exhaust gas purification unit containing a catalyst, where the engine emits an exhaust gas having an exhaust gas temperature and the catalyst has a catalytic activity for the purification of the ... 11/16/06 - 20060254257 - Apparatus and method for determining catalyst degradation A target air-fuel ratio of exhaust gas is changed back and forth between rich and lean in short periods, and it is determined that the catalyst is degraded when the air-fuel ratio of exhaust gas is lean by the time a predetermined period of time has passed from the time ... 11/02/06 - 20060242945 - Method and apparatus for diagnosing exhaust gas aftertreatment component degradation A system is provided for diagnosing operation of an exhaust gas aftertreatment component for an internal combustion engine. The system includes a NOx sensor producing a NOx signal indicative of NOx content of exhaust gas exiting the aftertreatment component, and a control circuit configured to estimate as a function of ... 10/26/06 - 20060236678 - Degradation estimating apparatus for unburned component adsorption catalyst The present invention relates to a degradation estimating apparatus for an unburned fuel component adsorption catalyst, which is connected with an internal combustion engine and has an unburned fuel component adsorbent and an oxygen storage component. The apparatus includes a degradation estimating unit for making estimation for a degradation of ... 10/05/06 - 20060218896 - 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 decrease of an intake pipe pressure P to a preset reference negative pressure Pref and reduction ... 10/05/06 - 20060218895 - 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 least one undesirable exhaust gas component is situated. A measure for the conversion is determined from the exhaust gas ... 10/05/06 - 20060218894 - Vehicular control device An engine ECU executes a program including the steps of: if it is necessary to take an anti catalytic odor approach and the engine should be warmed up, resetting an engine warm up request flag to cut fuel for the approach; cutting the fuel and determining whether the approach has ... 09/07/06 - 20060196167 - Exhaust gas purifying apparatus for internal combustion engine An exhaust gas purifying apparatus for an internal combustion engine including a first filter and a second filter. The first filter traps particulates in exhaust gases from said engine. The second filter is provided for failure detection and disposed downstream of the first filter. The trapping state of the second ... 08/03/06 - 20060168943 - 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 may allow a catalytic converter diagnosis with a high degree of accuracy. At least one catalytic converter is positioned in the exhaust-gas region of the internal combustion engine, and a lambda sensor, which is configured ... 06/29/06 - 20060137326 - Control device for an internal combustion engine Prior to failure determination of a three-way catalyst, which is carried out on the basis of a reverse frequency ratio of upstream and downstream O2 sensors, deterioration determination is performed at the point when the reverse frequency ratio of the O2 sensors starts to increase, and low NOx control is ... 06/15/06 - 20060123768 - Catalytic converter degradation A catalytic converter degradation determining system is configured to accurately determine if a NOx trapping catalytic converter is degraded. The system is configured to detect or estimate the temperature of a NOx trapping catalytic converter and sets a pre-degradation adsorption efficiency and a post-degradation adsorption efficiency based on the catalytic ... 05/18/06 - 20060101808 - 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, etc. The engine self-diagnosis system comprises a unit for directly or indirectly detecting performance A of an exhaust cleaning catalyst ... 05/04/06 - 20060090455 - Abnormality diagnosis apparatus for secondary air supply system of engine An abnormality diagnosis apparatus is used for a secondary air supply system for an internal combustion engine. The system includes an air pump for supplying secondary air into an upstream of a catalyst in an exhaust gas passage of the internal combustion engine. A secondary air detecting means detects secondary ... 03/30/06 - 20060064965 - Diagnostic apparatus for internal combustion engine A diagnostic apparatus for an internal combustion engine. An exhaust purification section includes an exhaust purifier disposed in an exhaust passage of the internal combustion engine, for purifying an exhaust emission, and a purifier activation section configured to control engine operating parameters of the internal combustion engine to promote activation ... 12/08/05 - 20050268597 - Exhaust emission control device for internal combustion engine A DPF is used in an internal combustion engine for trapping PM discharged from an engine body. Presence and absence of an abnormality in the DPF is evaluated using differential pressure, which is between the front and the rear of the DPF. The differential pressure considerably decreases or considerably increases ... 12/08/05 - 20050268596 - Electric heated catalyst failure diagnostic device It is an object to provide an electric heated catalyst failure diagnostic device that is compact, lightweight, inexpensive, and can accurately detect a disconnection of the heater and an abnormality in a circuit from the power supply to the heater with a simple configuration. When an ECU orders to apply ... 12/01/05 - 20050262828 - Diagnostic device and method of engine exhaust purifying system A diagnostic device and method of an engine exhaust purifying system, which perform active control of an air-fuel ratio and can make diagnosis of air-fuel ratio sensors, catalysts, etc. in the engine exhaust purifying system with high accuracy and reliability while avoiding a worsening of exhaust emissions, an increase of ... 12/01/05 - 20050262827 - 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 runs idle without a fuel cut regardless of fulfillment of preset fuel cut conditions, the control procedure ... 11/17/05 - 20050252197 - 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 in the ALNC hydrocarbon conversion efficiency due to ageing, and thus provides a more accurate estimate of an exotherm ... 11/17/05 - 20050252196 - Method for adjusting a defined oxygen concentration by means of binary lambda regulation in order to diagnose an exhaust gas catalyst The invention relates to a method for diagnosing a regulated exhaust gas catalyst, according to which regulating the catalyst results in control cycles, catalyst diagnosis being performed at a predetermined oxygen concentration per control cycle. A fuel mixture can be adjusted fat or lean according to a specific lambda control ... 10/06/05 - 20050217244 - Catalyst degradation determining method A catalyst degradation determining method includes the steps of: controlling an upstream-of-catalyst air-fuel ratio occurring upstream of a first catalyst to an air-fuel ratio that is rich of a stoichiometric air-fuel ratio so that first and second catalysts store oxygen up to a maximum storage amount of oxygen. The method ... 10/06/05 - 20050217243 - Catalyst degradation determining method A catalyst degradation determining method includes the steps of: controlling an upstream-of-catalyst air-fuel ratio occurring upstream of a first catalyst to an air-fuel ratio that is rich of a stoichiometric air-fuel ratio so that first and second catalysts store oxygen up to a maximum storage amount of oxygen. The method ... 10/06/05 - 20050217242 - Catalyst degradation determining method A catalyst degradation determining method includes the steps of: controlling an upstream-of-catalyst air-fuel ratio occurring upstream of a first catalyst to an air-fuel ratio that is rich of a stoichiometric air-fuel ratio so that first and second catalysts store oxygen up to a maximum storage amount of oxygen. The method ... 09/29/05 - 20050210868 - 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 NOx concentration in the exhaust gas. On the basis of O2 concentration detected in a course of ... 09/29/05 - 20050210867 - 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 combustion engine, which distributes the exhaust gas between a first and at least one second exhaust gas ... 09/29/05 - 20050210866 - Drive device for a secondary air injection system In a secondary air injection system, MOSFETs control supply of electric current to an air pump and to a motor for driving an electromagnetic valve and to an electromagnetic coil to introduce secondary air into an exhaust gas passage upstream of a catalyst for purifying the exhaust gas of an ... 09/22/05 - 20050204725 - Diagnosing an aftertreatment system with a nonthermal plasma discharge device coupled to a lean burn engine The invention is a method for diagnosing operation of a nonthermal plasma discharge device and a lean NOx trap disposed in the exhaust of an internal combustion engine. The method further includes reducing power to the nonthermal plasma discharge device and determining that the nonthermal plasma discharge device is operating ... 09/01/05 - 20050188681 - Deterioration diagnosis of diesel particulate filter A filter (14) traps particulate matter contained in the exhaust gas of a diesel engine (1). The filter (14) is regenerated by burning the trapped particulate matter through an operation to raise the exhaust gas temperature. An oxidation catalyst which promotes combustion of the particulate matter is coated onto the ... 09/01/05 - 20050188680 - Deterioration diagnosing device and diagnosing method for exhaust gas purification catalyst To determine whether an exhaust gas purification catalyst (42) of an engine (1) has deteriorated, first deterioration of the catalyst (42) is determined on the basis of an excess air ratio difference, which is a value expressing a difference in the oxygen concentration on the upstream side and downstream side ... 09/01/05 - 20050188679 - Deterioration diagnosing device and diagnosing method for exhaust gas purification catalyst To determine whether an exhaust gas purification catalyst (42) of an engine (1) has deteriorated, a characteristic of exhaust gas on an upstream side of the catalyst (42) is detected, a characteristic of the exhaust gas on a downstream side of the catalyst (42) is detected, and when the engine ... 08/18/05 - 20050178108 - Method for operating an electro motor-driven secondary air pump A method for operating an electro motor-driven secondary air pump which is provided for injecting secondary air into the exhaust system of an internal combustion engine. The secondary air pump is operated in a clocked manner. The induced voltage at the electro motor of the secondary air pump, measurable during ... 07/14/05 - 20050150209 - Method for diagnosing a secondary-air system of an internal combustion engine A method for diagnosing a secondary-air system of an internal combustion engine. The secondary-air system introduces secondary air into the exhaust-gas region of the internal combustion engine, the secondary air exothermically reacting together with combustible exhaust-gas components, and a thermoreactor being formed in the reaction region. The method provides for ... 07/14/05 - 20050150208 - Apparatus for and method of detecting deterioration of catalyst in internal combustion engine An apparatus for detecting deterioration of a catalyst in an internal combustion engine initially biases an air/fuel ratio of an air-fuel mixture supplied to the internal combustion engine to a rich amount so that an amount of oxygen stored in the catalyst is substantially zero. Then, the apparatus detects deterioration ... 07/07/05 - 20050144933 - Method of deciding on catalyst deterioration and means for deciding on catalyst deterioration in nox purging system The present invention provides a method of deciding on catalyst deterioration in an exhaust gas decontamination system, which method enables making an accurate decision on the state of deterioration of catalyst caused by sulfur poisoning in a NOx purging system using a direct reduction type NOx catalyst in the purging ... 06/30/05 - 20050138917 - Deterioration diagnostic device for an exhaust gas purifier The invention provides a deterioration diagnostic device for diagnosing a degradation condition of an exhaust gas purifier disposed in an exhaust passage in an engine based on a sensor value of an exhaust gas sensor that is disposed downstream of the purifier. The device includes detecting-signal generating unit for generating ... 06/16/05 - 20050126161 - Regeneration control of diesel particulate filter A diesel particulate filter (41) which traps particulate matter contained in the exhaust gas of a diesel engine (1) comprises an oxidation catalyst (41A) which exhibits a temperature-raising effect during regeneration of the filter (41). A controller (31) calculates the amount of particulate matter trapped in the filter (41) at ... 06/09/05 - 20050120706 - Air-fuel ratio control apparatus of internal combustion engine An air-fuel ratio control apparatus of an internal combustion engine includes: an exhaust gas purifying catalyst disposed in an exhaust passage of the internal combustion engine; fuel cutting means for cutting fuel to be supplied to the internal combustion engine at the time of deceleration of the internal combustion engine; ... ### FreshPatents.com Support |