Patents by Inventor Ognyan N. Yanakiev
Ognyan N. Yanakiev has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20130192214Abstract: A control method for monitoring a soot sensor of an exhaust treatment system is provided. The control method includes: determining when regeneration has completed; comparing soot sensor data to an estimated soot data based on the determining; and generating a message based on the comparing.Type: ApplicationFiled: January 31, 2012Publication date: August 1, 2013Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Ognyan N. Yanakiev, David E. Winn, Eric M. Hall, Christopher P. Musienko
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Patent number: 8265852Abstract: A control system includes a first module, a fuel determination module, a temperature error correction module, and a hydrocarbon injection control module. The first module determines a temperature difference between a desired inlet temperature of a particulate filter (PF) and an outlet temperature of a first catalyst. The fuel determination module determines an uncorrected desired fuel value based on the temperature difference, an ambient temperature, and a mass flow of exhaust gas. The temperature error correction module generates a desired fuel value based on the uncorrected desired fuel value. The hydrocarbon injection control module controls a hydrocarbon injector based on the desired fuel value.Type: GrantFiled: May 13, 2009Date of Patent: September 11, 2012Inventors: Ognyan N. Yanakiev, Charles E. Solbrig
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Patent number: 8245567Abstract: A method for indicating a malfunctioning catalyst in a powertrain including an internal combustion engine and an aftertreatment system including an aftertreatment device utilizing a catalyst to convert NOx includes monitoring a NOx content entering the aftertreatment system, monitoring a NOx content exiting the aftertreatment system, determining an actual conversion efficiency based upon the NOx content entering the aftertreatment system and the NOx content exiting the aftertreatment system, monitoring factors affecting conversion efficiency within the aftertreatment device, determining a malfunction conversion efficiency indicative of the malfunctioning catalyst based upon the factors affecting conversion efficiency within the aftertreatment device, and indicating the malfunctioning catalyst based upon comparing the actual conversion efficiency to the malfunction conversion efficiency.Type: GrantFiled: August 7, 2009Date of Patent: August 21, 2012Assignee: GM Global Technology Operations LLCInventors: Yue-Yun Wang, Charles E. Solbrig, Ognyan N. Yanakiev
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Patent number: 8201444Abstract: A powertrain includes an internal combustion engine and an aftertreatment system having an aftertreatment device utilizing a catalyst to convert NOx. A method for indicating a malfunctioning catalyst includes monitoring an actual NOx content exiting the aftertreatment system, monitoring factors affecting conversion efficiency of the aftertreatment device, determining a predicted threshold NOx content exiting the aftertreatment system for an exemplary malfunctioning catalyst based upon the factors affecting conversion efficiency, comparing the actual NOx content exiting the aftertreatment system to the predicted threshold NOx content exiting the aftertreatment system, and indicating a malfunctioning catalyst based upon the comparing.Type: GrantFiled: August 7, 2009Date of Patent: June 19, 2012Assignee: GM Global Technology Operations LLCInventors: Yue-Yun Wang, Ognyan N. Yanakiev, Charles E. Solbrig
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Patent number: 8171720Abstract: 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 system subsequent to a powertrain start-up event through a test span, monitoring a measure of NOx content entering the aftertreatment system subsequent to a powertrain start-up event through the test span, and determining a measure of NOx conversion accomplished in the aftertreatment device based upon the NOx content exiting the aftertreatment system and the measure of NOx content entering the aftertreatment system. The method includes, through the test span, comparing the measure of NOx conversion determined at a start of the test span to the measure of NOx conversion at a later time within the test span.Type: GrantFiled: October 6, 2008Date of Patent: May 8, 2012Assignee: GM Global Technology Operations LLCInventors: Yue-Yun Wang, Ognyan N. Yanakiev, Man-Feng Chang
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Patent number: 8091416Abstract: A method for controlling a malfunction catalyst diagnostic test that determines a malfunction status of a catalyst within a selective catalytic reduction device includes monitoring an exhaust gas flow within an aftertreatment system, estimating an effect of the exhaust gas flow on an estimated reductant storage on a catalyst within the selective catalytic reduction device, and selectively disabling the malfunction catalyst diagnostic test based upon the estimating the effect of the exhaust gas flow on the estimated reductant storage.Type: GrantFiled: January 16, 2009Date of Patent: January 10, 2012Assignee: GM Global Technology Operations LLCInventors: Yue-Yun Wang, Ognyan N. Yanakiev, Charles E. Solbrig
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Publication number: 20110146243Abstract: An exhaust gas aftertreatment system for a diesel engine is provided. The system includes a controller operably coupled to the engine that induces the engine to combust a rich air/fuel mixture in at least one cylinder at a predetermined time interval after startup of the engine to output exhaust gases including elevated levels of CO, and a percentage increase in HC that is less than a minimal threshold percentage relative to combusting a lean air/fuel mixture. The system further includes a diesel oxidation catalyst that receives the exhaust gases and oxidizes the CO to obtain an exothermic reaction that increases a temperature of the exhaust gases flowing through the oxidation catalyst to greater than a threshold temperature level. The system further includes an SCR catalyst which receives the exhaust gases and reduces NOx in the exhaust gases.Type: ApplicationFiled: December 18, 2009Publication date: June 23, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Ognyan N. Yanakiev, Charles E. Solbrig
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Publication number: 20100228463Abstract: An engine control system includes an engine calibration module that sets fuel injection timing based on one of N cetane number (CN) values, wherein N is an integer greater than one. A combustion noise module generates a combustion noise signal based on cylinder pressure in a compression ignition (CI) engine during combustion. A fuel quality determination module compares the combustion noise signal to N predetermined combustion noise levels corresponding to the N CN values, and that selects the one of the N CN values based on the comparison.Type: ApplicationFiled: March 9, 2009Publication date: September 9, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Chol-Bum M. Kweon, Frederic Anton Matekunas, Ibrahim Haskara, Yue-Yun Wang, Ognyan N. Yanakiev, Donald Terry French, Paul Anthony Battiston
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Publication number: 20100223908Abstract: A control system comprising an upstream nitrogen oxide (NOx) control module that increases an upstream NOx level based on an initial upstream NOx level in an exhaust system, and an ammonia (NH3) storage condition detection module that detects a NH3 storage condition based on a difference in a downstream NOx level before and after the upstream NOx level is increased. A method comprising increasing an upstream NOx level based on an initial upstream NOx level in an exhaust system, and detecting an NH3 storage condition based on a difference in a downstream NOx level before and after the upstream NOx level is increased.Type: ApplicationFiled: March 9, 2009Publication date: September 9, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Charles E. Solbrig, Ognyan N. Yanakiev
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Publication number: 20100218487Abstract: Methods and systems for detecting faults with nitrogen oxides sensors used to detect the presence of nitrogen oxides in an exhaust effluent gas stream emitted from a combustion engine during its operation include providing a virtual nitrogen oxides sensor measurement compared with actual nitrogen oxides content measured by nitrogen oxides sensors.Type: ApplicationFiled: March 2, 2009Publication date: September 2, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Yue-Yun Wang, Ognyan N. Yanakiev, Ibrahim Haskara
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Publication number: 20100180576Abstract: A method for controlling a malfunction catalyst diagnostic test that determines a malfunction status of a catalyst within a selective catalytic reduction device includes monitoring an exhaust gas flow within an aftertreatment system, estimating an effect of the exhaust gas flow on an estimated reductant storage on a catalyst within the selective catalytic reduction device, and selectively disabling the malfunction catalyst diagnostic test based upon the estimating the effect of the exhaust gas flow on the estimated reductant storage.Type: ApplicationFiled: January 16, 2009Publication date: July 22, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Yue-Yun Wang, Ognyan N. Yanakiev, Charles E. Solbrig
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Patent number: 7735320Abstract: A control system for a dual stage turbo includes a control module, a variable geometry turbine (VGT) module, and a bypass valve module. The control module generates a turbo control signal based on an manifold absolute pressure (MAP) and a desired MAP. The VGT module generates a VGT control signal to actuate vanes in a VGT based on the turbo control signal. The bypass valve module generates a bypass control signal based on the turbo control signal and the VGT control signal. The bypass control signal actuates a valve to bypass the VGT.Type: GrantFiled: August 29, 2006Date of Patent: June 15, 2010Assignee: GM Global Technology Operations, Inc.Inventor: Ognyan N. Yanakiev
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Publication number: 20100083636Abstract: 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 system subsequent to a powertrain start-up event through a test span, monitoring a measure of NOx content entering the aftertreatment system subsequent to a powertrain start-up event through the test span, and determining a measure of NOx conversion accomplished in the aftertreatment device based upon the NOx content exiting the aftertreatment system and the measure of NOx content entering the aftertreatment system. The method includes, through the test span, comparing the measure of NOx conversion determined at a start of the test span to the measure of NOx conversion at a later time within the test span.Type: ApplicationFiled: October 6, 2008Publication date: April 8, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Yue-Yun Wang, Ognyan N. Yanakiev, Man-Feng Chang
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Publication number: 20100076666Abstract: A control system includes a first module, a fuel determination module, a temperature error correction module, and a hydrocarbon injection control module. The first module determines a temperature difference between a desired inlet temperature of a particulate filter (PF) and an outlet temperature of a first catalyst. The fuel determination module determines an uncorrected desired fuel value based on the temperature difference, an ambient temperature, and a mass flow of exhaust gas. The temperature error correction module generates a desired fuel value based on the uncorrected desired fuel value. The hydrocarbon injection control module controls a hydrocarbon injector based on the desired fuel value.Type: ApplicationFiled: May 13, 2009Publication date: March 25, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Ognyan N. Yanakiev, Charles E. Solbrig
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Publication number: 20100043400Abstract: A powertrain includes an internal combustion engine and an aftertreatment system having an aftertreatment device utilizing a catalyst to convert NOx. A method for indicating a malfunctioning catalyst includes monitoring an actual NOx content exiting the aftertreatment system, monitoring factors affecting conversion efficiency of the aftertreatment device, determining a predicted threshold NOx content exiting the aftertreatment system for an exemplary malfunctioning catalyst based upon the factors affecting conversion efficiency, comparing the actual NOx content exiting the aftertreatment system to the predicted threshold NOx content exiting the aftertreatment system, and indicating a malfunctioning catalyst based upon the comparing.Type: ApplicationFiled: August 7, 2009Publication date: February 25, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Yue-Yun Wang, Ognyan N. Yanakiev, Charles E. Solbrig
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Publication number: 20100043397Abstract: A method for indicating a malfunctioning catalyst in a powertrain including an internal combustion engine and an aftertreatment system including an aftertreatment device utilizing a catalyst to convert NOx includes monitoring a NOx content entering the aftertreatment system, monitoring a NOx content exiting the aftertreatment system, determining an actual conversion efficiency based upon the NOx content entering the aftertreatment system and the NOx content exiting the aftertreatment system, monitoring factors affecting conversion efficiency within the aftertreatment device, determining a malfunction conversion efficiency indicative of the malfunctioning catalyst based upon the factors affecting conversion efficiency within the aftertreatment device, and indicating the malfunctioning catalyst based upon comparing the actual conversion efficiency to the malfunction conversion efficiency.Type: ApplicationFiled: August 7, 2009Publication date: February 25, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Yue-Yun Wang, Charles E. Solbrig, Ognyan N. Yanakiev
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Patent number: 7493896Abstract: A control system and method for an exhaust gas recirculation (EGR) system of an engine includes a first sensor that senses fresh mass air flow, a second sensor that senses charge air flow, where the charge air flow is based on the fresh mass air flow and EGR exhaust flow, and a calculation module that determines a difference between the fresh mass airflow and the charge air flow and generates an EGR valve control signal based on the difference.Type: GrantFiled: December 27, 2006Date of Patent: February 24, 2009Assignee: GM Global Technology Operations, Inc.Inventors: Sherif H. El Tahry, Ognyan N. Yanakiev
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Publication number: 20080156302Abstract: A control system and method for an exhaust gas recirculation (EGR) system of an engine includes a first sensor that senses fresh mass air flow, a second sensor that senses charge air flow, where the charge air flow is based on the fresh mass air flow and EGR exhaust flow, and a calculation module that determines a difference between the fresh mass airflow and the charge air flow and generates an EGR valve control signal based on the difference.Type: ApplicationFiled: December 27, 2006Publication date: July 3, 2008Inventors: Sherif H. El Tahry, Ognyan N. Yanakiev
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Publication number: 20080053088Abstract: A control system for a dual stage turbo includes a control module, a variable geometry turbine (VGT) module, and a bypass valve module. The control module generates a turbo control signal based on an manifold absolute pressure (MAP) and a desired MAP. The VGT module generates a VGT control signal to actuate vanes in a VGT based on the turbo control signal. The bypass valve module generates a bypass control signal based on the turbo control signal and the VGT control signal. The bypass control signal actuates a valve to bypass the VGT.Type: ApplicationFiled: August 29, 2006Publication date: March 6, 2008Inventor: Ognyan N. Yanakiev
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Patent number: 7321820Abstract: An engine control system that having an exhaust gas recirculation (EGR) valve includes a first module that determines an EGR error and a second module that calculates a fuel injection timing based on the EGR error. Operation of an engine is regulated based on the fuel injection timing to reduce emissions during transient operation of the engine.Type: GrantFiled: January 30, 2006Date of Patent: January 22, 2008Assignee: GM Global Technology Operations, Inc.Inventors: Ognyan N. Yanakiev, Chan-Chiao Lin, Sherif H. El Tahry