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| Number | Title | Issue Date |
| 8186146 | After-treatment component detection system An after-treatment component detection system may include an exhaust system configured to include an after-treatment component configured to remove one or more constituents of the exhaust gases. The detection system may include an upstream temperature sensor configu... | 05/29/2012 |
| 8186147 | Catalyst deterioration-determination device and method and engine control unit A catalyst deterioration-determining device capable of properly performing deterioration determination, while compensating for differences in output characteristics of oxygen concentration parameter sensors disposed upstream and downstream of the catalyst, respectiv... | 05/29/2012 |
| 8176726 | Method for introducing a reagent medium into an exhaust gas conduit of an internal combustion engine, and apparatus for carrying out the method A method for introducing a reagent medium into an exhaust gas conduit of an internal combustion engine, and an apparatus for carrying out the method. Provision is made for a diagnosis of the pressure sensor. In at least one first time interval in which a steady pres... | 05/15/2012 |
| 8171720 | System and methods to detect non-urea reductant filled in a urea tank A method for indicating a non-urea reductant fault in a powertrain including an internal combustion engine and an aftertreatment system having an aftertreatment device utilizing a catalyst to convert NOx includes monitoring a NOx content exiting the aftertreatment s... | 05/08/2012 |
| 8166749 | Exhaust treatment diagnostic system and method A method and system for monitoring operation of an exhaust treatment system of a diesel engine includes a dosing system for injecting an injection fluid and a temperature sensor generating temperature signals corresponding to exhaust temperatures. A control module d... | 05/01/2012 |
| 8161729 | Exhaust purification system for internal combustion engine and control method of the exhaust purification system An exhaust purification system for an internal combustion engine has a hydrogen concentration sensor (2) disposed upstream of a catalytic converter (1) in the engine exhaust system to detect a hydrogen concentration in the exhaust gas. An optimum combu... | 04/24/2012 |
| 8156728 | Method, device and computer program product for diagnosing of at least one exhaust emission control unit A method, device and computer program product are provided for diagnosing of a NOx-reducing catalyzer that can be regenerated and/or of a three-way valve for directing the flow of exhaust gases into a bypass pipe, and/or of a clean-up catalyzer. All the components c... | 04/17/2012 |
| 8156729 | Variable engine out emission control roadmap A method for operating an internal combustion engine for variable engine out NOx control talking into account the age of the SCR. ... | 04/17/2012 |
| 8151552 | Deterioration determination device and method for exhaust emission reduction device, and engine control unit A deterioration determining device for an exhaust emission reduction device which is capable of improving the accuracy of determination of deterioration of a catalyst as a target, when another catalyst is disposed upstream of the target. The deterioration determinin... | 04/10/2012 |
| 8146345 | Normalizing oxygen storage capacity(OSC) for catalyst monitoring An oxygen storage capacity (OSC) monitoring system for a vehicle having a catalytic converter includes a control module that determines a measured OSC based on an inlet sensor signal (ISS) that is responsive to an oxygen content of exhaust flowing into the catalytic... | 04/03/2012 |
| 8146346 | NOtrapping catalytic converter diagnostic apparatus A NOx trapping catalytic converter diagnostic apparatus basically has a particulate matter accumulation estimating component, a particulate matter accumulation detecting component and a deterioration determining component. The particulate matter accumulation estimat... | 04/03/2012 |
| 8146344 | Exhaust heat recovery system abnormality detection device An ECU executes a program including the steps of: when a switching valve is controlled to be closed, comparing exhaust gas's temperature, as detected, with a map value; if the exhaust gas's temperature is larger than the map value, determining that the switching val... | 04/03/2012 |
| 8141340 | Apparatus, system, and method for determining the degradation of an SCR catalyst According to one representative embodiment, an apparatus for determining the degradation of a selective catalytic reduction (SCR) catalyst of an engine exhaust aftertreatment system includes a system properties module configured to store at least one system dynamics... | 03/27/2012 |
| 8141341 | Vehicle and control method of vehicle The catalyst smell reducing control in which the fuel cutoff is performed is not executed regardless of the catalyst smelling flag Fs1 equal to ‘1’ (step S140) when the vehicle speed V becomes less than the preset vehicle speed Vref (step S130 | 03/27/2012 |
| 8117829 | 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 while causing the consumption amount of reducing agent dependent on the degradation degree of an upstream cata... | 02/21/2012 |
| 8112984 | Method and device for the diagnosis of the effectiveness of a catalytic converter In a method and a device for the diagnosis of the effectiveness of a catalytic converter in the exhaust gas line when using a very late afterinjection or secondary injection, in order to provide a sensitive and yet robust diagnostic method while saving costs for add... | 02/14/2012 |
| 8109076 | Method and device for purging an injector in a fuel injector system of use in the regeneration of a particulate filter A method and a device for purging an injector in a fuel injector system of use in regeneration of a particle filter. The aging of fuel is determined and compared with a fuel aging threshold value, and a purge request is activated if the threshold value is exceeded. ... | 02/07/2012 |
| 8099947 | Control and diagnostic approach for emission control device A system and method for engine control and diagnostics are described. In one example, a catalyst is modeled as a non-linear integrator. The method may improve engine air-fuel diagnostics. ... | 01/24/2012 |
| 8099946 | Method, device and computer program product for diagnosing an oxidation catalyst A method, a device and a computer program product for the diagnosis of an oxidation catalyst for the oxidation of NO into NO2 in a motor vehicle is provided. An exhaust gas aftertreatment system includes at least the aforementioned oxidation catalyst and ... | 01/24/2012 |
| 8087231 | Deterioration-determination apparatus for exhaust gas purifying system A main feedback control based on an output of an upstream sensor, and a sub-feedback control based on an output of a downstream sensor are executed. A specified fuel disturbance is inputted and an output of the downstream sensor is measured to derive a characteristi... | 01/03/2012 |
| 8079209 | Urea-SCR system and control method thereof A method for controlling an urea-SCR system may include a first step for calculating a target urea injection amount, a second step that uses urea injection pressure and urea injection time to calculate a real urea injection amount, a third step that calculates a dif... | 12/20/2011 |
| 8074442 | Method of determining abnormality in particulate filter An object of the invention is to realize a method of determining an abnormality in a particulate filter (5) capable of trapping and oxidizing particulate matter contained in exhaust gas in which even a minor abnormality in which small quantity of particulate ... | 12/13/2011 |
| 8074441 | 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 ... | 12/13/2011 |
| 8069649 | Exhaust emission purifying apparatus for engine When a concentration measured by a sensor is lower than a predetermined threshold, it is judged that a liquid is any different type of aqueous solution, and also, it is judged whether or not the different type discrimination is adequate. When the discrimination is a... | 12/06/2011 |
| 8065869 | Method for determining the conversion performance of an oxygen storage-capable catalytic converter of an internal combustion engine In a method for determining the conversion performance of an oxygen storage-capable catalytic converter of an internal combustion engine, it is proposed that the catalytic converter be supplied with a stoichiometric exhaust gas composition, a known emission change i... | 11/29/2011 |
| 8037672 | Method and apparatus for detecting a non-operational status of a catalyst in an engine exhaust conduit A quantity of unburned fuel is provided through a combustion chamber of an engine and an exhaust conduit to a catalytic converter. The catalyst in the converter is determined to be non-operational if a post-catalyst temperature sensor does not indicate a sufficient ... | 10/18/2011 |
| 8033096 | Exhaust gas purifying apparatus for engine A temperature-sensitive type urea sensor 74 is adopted for use in an engine exhaust gas purifying apparatus. The magnitude of convection of urea aqueous solution generated in a storage tank 41 is determined based on temperature information detected by ... | 10/11/2011 |
| 8015800 | Internal combustion engine An engine exhaust passage has an SOx trapping catalyst (11), a particulate filter (13) holding an NOx storing/reducing catalyst, and an NOx storing/reducing catalyst (15) forming a post-treatment system and a fue... | 09/13/2011 |
| 8011174 | Apparatus for diagnosing exhaust gas purifying device In an apparatus for diagnosing an exhaust gas purifying device, a catalyst deterioration level detector 104 detects the deterioration level of a catalyst from a relationship between a catalyst-upstream air-fuel-ratio detector 101 and a catalyst-downstr... | 09/06/2011 |
| 8001766 | Method for checking the friction capability of an exhaust gas catalytic converter In a process for monitoring the function capability of an exhaust-gas catalytic converter 5 located in the exhaust line 3 of an internal combustion engine 1, based on the measured or computed signals of a first lambda probe 6a loca... | 08/23/2011 |
| 7997064 | Method and device for determining an oxygen storage capacity of a catalytic converter of an internal combustion engine and method and device for determining a dynamic time duration for exhaust probes of an internal combustion engine An exhaust gas catalytic converter is laden with oxygen until it is saturated at least upstream of an exhaust gas probe. A predefined first rich air/fuel ration is set in a combustion chamber of a cylinder. A first oxygen storage capacity value is determined as a fu... | 08/16/2011 |
| 7997065 | Device for estimating the load state of a NO storage catalytic converter A device for estimating the loading state of a NOx storage catalytic converter. The device includes a module for determining the oxygen concentration difference between an oxygen concentration present in the exhaust gas upstream of the NOX storage catalyt... | 08/16/2011 |
| 7997066 | Method for monitoring the functionality of the heating of a catalytic converter situated in an exhaust system of an internal combustion engine The diagnosis of the heating of a catalytic converter situated in an exhaust system of an internal combustion engine is described. The system includes monitoring the actual ignition angle intervention. A current ignition angle is acquired over a specified time and c... | 08/16/2011 |
| 7987661 | Method for determining malfunction of nitrogen oxide sensor and selective catalytic reduction system operating the same A method for determining malfunction of a nitrogen oxide sensor compares a nitrogen oxide amount detected by the sensor with a predetermined value of nitrogen oxide. If the difference between the predetermined value and the amount detected by the sensor is within a ... | 08/02/2011 |
| 7980059 | Exhaust gas purification system for internal combustion engine An object is to estimate the degree of deterioration of an NOx catalyst with improved accuracy in an exhaust gas purification system having the NOx catalyst provided in an exhaust passage. According to the present invention, an NOx sensor is provided downstream of a... | 07/19/2011 |
| 7980060 | Filter clogging determination apparatus for diesel engine A clogging determination apparatus determines clogging of a DPF (Diesel Particulate Filter) such that exhaust pressure is estimated using a sensor deigned for regular control of an engine, without using exhaust pressure sensor. The apparatus includes: the DPF dispos... | 07/19/2011 |
| 7975470 | Apparatus for judging condition of injection of reducing agent incorporated in exhaust gas purification system In relation to an exhaust gas purification system that mixes a liquid reducing agent with air and injection-supplies this mixture into an exhaust gas flowing on an upstream side of a reduction catalyst (20) to thereby effect reduction purification of NOx in e... | 07/12/2011 |
| 7971426 | Reductant injection system diagnostics A method is described for controlling operation of a reductant injection system. In one example, a pump of the reductant injection system is operated at a pressure to inject reductant into an exhaust system based on voltage supplied to the pump. The method can allow... | 07/05/2011 |
| 7934369 | Exhaust gas purifying apparatus for internal combustion engine An exhaust gas purifying apparatus for an internal combustion engine is provided. The apparatus includes a recoverable type exhaust gas purifying device provided in an exhaust passage, a reducing agent addition device for adding a reducing agent into the exhaust pas... | 05/03/2011 |
| 7930876 | Method and device for monitoring a particle filter in the exhaust line of an internal combustion engine A device for monitoring an operating mode of an element used for aftertreatment of exhaust gases from an internal combustion engine and to an associated method. The device includes a controller configured to receive a signal that represents a characteristic magnitud... | 04/26/2011 |
