Having Means Analyzing Composition Of Exhaust Gas Patents (Class 60/276)
  • Patent number: 11015510
    Abstract: A catalyst deterioration diagnosis system includes an air-fuel ratio detection element and a NOx detection element on a downstream side with respect to a catalyst, and a control element. The control element causes an engine to perform diagnosis operation performed with an exhaust gas temperature being kept at 600° C. or higher, such that at a timing when a downstream air-fuel ratio in a lean operation state reaches a threshold value, the engine is transitioned to a rich operation state, and at a timing that is a predetermined period after a downstream air-fuel ratio in a rich operation state reaches a threshold value, the engine is transitioned to a lean operation state. The diagnosis element compares NOx concentration during the rich operation state to a diagnosis threshold value, thereby to diagnose a degree of deterioration of NOx reduction capability of the catalyst.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: May 25, 2021
    Assignee: NGK INSULATORS, LTD.
    Inventors: Taku Okamoto, Osamu Nakasone
  • Patent number: 11008922
    Abstract: Diagnostics for inadequate performance and/or degradation of an exhaust aftertreatment system are disclosed. A performance degradation analysis of the exhaust aftertreatment system includes a determination of a long term brake specific NOx value over a time period and a comparison of the long term brake specific NOx value to a threshold value.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: May 18, 2021
    Assignee: Cummins Inc.
    Inventors: Thomas A. Grana, Girish Chandramouli, Sergio M. Hernandez-Gonzalez, Ravindra Kakade
  • Patent number: 11002203
    Abstract: Methods and apparatuses for calibration and control of various engine subsystems using a target value approach. Under the target value approach, the control of each engine subsystem is separated or decoupled to include a set of target values, or a reference value set. A subsystem has a corresponding target determiner, which provides a target value set, or reference value set, in response to a basis variable set and optionally an overall subsystem target. The basis variable set includes parameters selected to robustly characterize the variables that affect the operation of the particular subsystem. The target determiner is optionally calibrated to provide a reference value set within specifications of the subsystem. A physical subsystem controller operates in response to the reference value set.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: May 11, 2021
    Assignee: Cummins Inc.
    Inventors: Phanindra V. Garimella, Paul V. Moonjelly, Edmund P. Hodzen, Ming-feng Hsieh, Gayatri Adi, Gokul Vishwanathan
  • Patent number: 10995645
    Abstract: An exhaust aftertreatment system for an internal combustion engine has an exhaust system having at least one three-way catalyst near the engine, wherein a particulate filter is arranged downstream from the three-way catalyst, preferably in an underbody installation in a motor vehicle. A heated catalyst, which has at least one heating stage that can be heated by means of an electric heating element, is provided upstream from the at least one three-way catalyst and downstream from the particulate filter. The at least one electrically heatable heating stage is supplied with electric power directly from a generator that is operatively connected to the internal combustion engine, so that heating of the heated catalyst takes place essentially independently of the charge status of the vehicle battery.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: May 4, 2021
    Assignee: Volkswagen Aktiengesellschaft
    Inventors: Stefan Paukner, Falk-Christian Baron Von Ceumern-Lindenstjerna, Michael Manz
  • Patent number: 10976254
    Abstract: A fire detection system includes: a transmitter to output a first optical signal including a wavelength absorbed by a first gas generated in an early stage of a fire and a second optical signal including a wavelength absorbed by a second gas having an amount of generation being increased as the fire progresses; and a receiver including a detector to receive the first optical signal and the second optical signal propagating through a measuring target space, a first gas concentration calculator to calculate a concentration of the first gas, a second gas concentration calculator to calculate a concentration of the second gas, a smoke concentration calculator to calculate a smoke concentration, and a determination unit to determine progress of the fire, based on the concentration of the first gas, the concentration of the second gas, the smoke concentration, and an environmental temperature.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: April 13, 2021
    Assignee: NEC CORPORATION
    Inventor: Akihiro Tanaka
  • Patent number: 10975753
    Abstract: A method for operating an exhaust gas recirculation system using rationality diagnostics for an automobile vehicle includes: estimating an oxygen storage content (OSC) of a catalytic converter of a vehicle; comparing an amount of oxygen stored in the catalytic converter to an OSC threshold; initiating a closed oxygen storage control (COSC) event for a predetermined one of multiple cylinders of an engine of a vehicle if the OSC threshold is met or exceeded, the COSC event targeting a rich air-fuel equivalence ratio (EQR) for the predetermined one of the multiple cylinders; and directing a fuel injector communicating with the predetermined one of the multiple cylinders to operate the predetermined one of the multiple cylinders at the rich EQR.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: April 13, 2021
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Michael A. Smith, Martino A. Casetti, Michael Kaczmar, Scott R. Jeffrey
  • Patent number: 10962446
    Abstract: A housing connection element (10) for a housing of an exhaust gas treatment assembly unit of an exhaust system, especially for an internal combustion engine, includes a first housing part (16) with an essentially cylindrical first connection area (18) for connection to a circumferential wall (14) of a housing (12) of an exhaust gas treatment assembly unit. A tapered area (20) is adjacent to the first connection area (18). An annular, second housing part (40) is connected to the tapered area (20). A second connection area (46) is provided for connection to an exhaust gas-carrying component of an exhaust system. At least one sensor sleeve (48, 50) is in a sleeve receiving area (24) of the first housing part (16). The sleeve receiving area (24) is formed in the tapered area (20).
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: March 30, 2021
    Assignee: Eberspächer Exhaust Technology GmbH & Co. KG
    Inventors: Matthias Scheer, Christoph Buckermann
  • Patent number: 10920645
    Abstract: Methods and systems are provided for monitoring a NOx storage capacity of a passive NOx adsorption catalyst (PNA) included in an exhaust gas after-treatment system of an engine. In one example, a method may include, after an engine cold start and prior to an exhaust gas temperature reaching an upper threshold temperature, indicating degradation of the PNA based on an amount of NOx measured downstream of the PNA during a fuel cut event and while the exhaust gas temperature is between a lower threshold temperature and the upper threshold temperature. In this way, degradation of the NOx storage capacity may be inferred based on an amount of NOx released from the PNA and independent of a NOx storage measurement.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: February 16, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: In Kwang Yoo, Michiel Van Nieuwstadt, Douglas Allen Dobson, Christine Lambert
  • Patent number: 10907520
    Abstract: An exhaust system includes an exhaust duct having an internal surface defining an exhaust gas passage extending along an axis. At least one sensor opening is in the exhaust duct and is configured to receive an exhaust gas sensor. A wall is positioned within the exhaust gas passage to extend at least partially around the at least one sensor opening. The wall has an inner wall surface defining an internal volume. A plurality of inlet pipes are in fluid communication with the internal volume, and each inlet pipe extends from a first end open to the internal volume to a second end that is distal from the first end. Each inlet pipe includes a plurality of inlet apertures.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: February 2, 2021
    Assignee: Faurecia Emissions Control Technologies, USA, LLC
    Inventors: Eric Ker, Philip Dimpelfeld
  • Patent number: 10907559
    Abstract: A control device to be applied to an internal combustion engine having a fuel reformation cylinder and an output cylinder, wherein the compression end gas temperature of the fuel reformation cylinder is adjusted by changing an EGR gas amount, an effective compression ratio, or a polytropic number according to an equivalence ratio in the fuel reformation cylinder so as to achieve a target concentration of a specific gas component in reformed fuel generated in the fuel reformation cylinder. The target concentration is defined according to a required engine power.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: February 2, 2021
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventors: Go Asai, Hideyuki Ogawa, Gen Shibata, Kenji Yamazaki
  • Patent number: 10907554
    Abstract: An internal combustion engine in which when the gas temperature of a fuel reformation chamber when a piston in a fuel reformation cylinder reaches the compression top dead point is estimated to be equal to or higher than a soot generation lower limit temperature set according to an equivalence ratio of the fuel reformation chamber, a reaction gas temperature adjusting operation for suppressing or reducing an increase in the reaction gas temperature in the fuel reformation chamber is executed. Further, a closing timing of an air-intake valve is changed to reduce an effective compression ratio of the fuel reformation chamber.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: February 2, 2021
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventor: Go Asai
  • Patent number: 10837395
    Abstract: Methods and systems are provided for adjusting amount of directly injected fuel scavenged via a second exhaust manifold of a split exhaust engine system. In one example, a method may include adjusting a start of injection of a fuel direct injection into an engine cylinder, the cylinder including a first exhaust valve coupled to a first exhaust manifold and a second exhaust valve coupled to a second exhaust manifold, the second exhaust manifold coupled to an intake of the engine, based on a closing timing of the second exhaust valve and dependent on an operating condition, and adjusting a position of a bypass valve of the second exhaust manifold based on the adjusted start of injection. In this way, the amount of scavenged fuel may be increased or decreased based on the operating condition.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: November 17, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Mohannad Hakeem, Ashley Peter Wiese, Daniel Madison, Brad Boyer, Dushyant Karthikeyan, William Cary Cole, Joseph Norman Ulrey
  • Patent number: 10815859
    Abstract: A catalyst abnormality diagnostic device is configured to diagnose an abnormality of a first purification catalyst having an oxygen storage capacity and a second purification catalyst having the oxygen storage capacity and a function of a particulate filter provided on an exhaust passage on a downstream side of the first purification catalyst. The catalyst abnormality diagnostic device adjusts a fuel injection amount so that an air-fuel ratio of an exhaust gas is repeatedly in a rich state and a lean state, obtains a first determination value indicating a catalytic performance of the first purification catalyst, obtains a second determination value indicating a catalytic performance of the second purification catalyst, and determines whether there is an abnormality in one or both of the first purification catalyst and the second purification catalyst on the basis of the first determination value, the second determination value, and a predetermined determination reference value.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: October 27, 2020
    Assignee: SUBARU CORPORATION
    Inventor: Takashi Sakai
  • Patent number: 10808672
    Abstract: Methods, devices, controllers, and algorithms are described for operating an internal combustion engine wherein at least some firing opportunities utilize low temperature gasoline combustion (LTGC). Other firing opportunities may be skipped or utilize some other type of combustion, such as spark ignition. The nature of any particular firing opportunity is dynamically determined during engine operation, often on a firing opportunity by firing opportunity basis. Firings that utilize LTGC produce little, if any, nitrous oxides in the exhaust stream and thus, in some implementations, may require no aftertreatment system to remove them from the exhaust stream.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: October 20, 2020
    Assignee: Tula Technology, Inc.
    Inventors: Elliott A. Ortiz-Soto, Matthew A. Younkins
  • Patent number: 10794249
    Abstract: An amount of deposition of intramural PM in a particulate filter is estimated with a high degree of accuracy. A controller obtains, as a correlation between a reference value of an intramural PM deposition amount and an oxygen storage capacity of the catalyst, a change over time of an oxygen storage capacity of the catalyst according to a change of a filter PM deposition amount in a period of time from a point in time at which the filter PM deposition amount is substantially zero to a point in time at which the oxygen storage capacity of the catalyst, which becomes larger according to an increase of the filter PM deposition amount, reaches a maximum value. Further, the controller estimates a current intramural PM deposition amount based on a current oxygen storage capacity of the catalyst and the correlation.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: October 6, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Naoya Kaneko, Hiromasa Hashimoto
  • Patent number: 10794811
    Abstract: An apparatus which detects particulate matter is provided. This apparatus estimates a volume of water inside an exhaust passage using estimation sections. When an estimated volume of water is larger than a water drainage threshold, an element portion is heated using a heater by the first temperature range controller, in a temperature range which resists water-induced cracking independent of a volume of water droplets. If the estimated volume of water is less than a water drainage threshold, the water drainage determination section determines that the water drainage of the exhaust passage is completed. Additionally, if it is estimated that the water drainage is completed, the element portion is heated by a second temperature controller at temperature lower than a starting temperature of combustion of particulate matter and in order to repel water adhered onto the element portion in a water-repellent temperature range for a predetermined period.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: October 6, 2020
    Assignee: DENSO CORPORATION
    Inventors: Go Miyagawa, Masayuki Tamura, Masahiro Yamamoto, Takashi Araki, Toshihiro Sakawa, Masato Katsuno, Manabu Yoshidome
  • Patent number: 10781740
    Abstract: An exhaust system, especially for an internal combustion engine in a vehicle, includes at least one sensor carrier unit (20) carried on an exhaust gas-carrying element (14). The sensor carrier unit (20) includes a sensor carrier element (22) fixed to the exhaust gas-carrying element (14). A plurality of sensor pipe connections (24, 26, 28), that are fitted or can be fitted with sensors, are provided on the sensor carrier element (22). The plurality of sensor pipe connections (24, 26, 28) each have at least one respective sensor-mounting/measuring opening (30) formed therein.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: September 22, 2020
    Assignee: Eberspächer Exhaust Technology GmbH & Co. KG
    Inventors: Benjamin Röhr, Roland Schwarz, Wolfgang Herbst, Frank Berkemer, Tadeusz-Jozef Juroszek, Peter Gorke
  • Patent number: 10774778
    Abstract: A system for control of an internal combustion system having subsystems, each with different response times. Subsystems may include a fuel system, an air handling system, and an aftertreatment system, each being operated in response to a set of reference values generated by a respective target determiner. Calibration of each subsystem may be performed independently. The fuel system is controlled at a first time constant. The air handling system is controlled on the order of a second time constant slower than the first time constant. The aftertreatment system is controlled on the order of a third time constant slower than the second time constant. A subsystem manager is optionally in operative communication with each target determiner to coordinate control. Generally, dynamic parameters from slower subsystems are treated as static parameters when determining reference values for controlling a faster subsystem.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: September 15, 2020
    Assignee: Cummins Inc.
    Inventors: Phanindra V. Garimella, Paul V. Moonjelly, Edmund P. Hodzen, Ming-feng Hsieh, Gayatri Adi, Gokul Vishwanathan
  • Patent number: 10760538
    Abstract: A multi-stage reconfigurable air intake and exhaust system for a piston engine having first and second rows of cylinders forming a V configuration. The system includes plural stage packages having inter-related components that can be connected and changed to form different air intake and exhaust gas configurations. There is particularly provided a Stage 1 package with first and second exhaust manifolds adapted to be respectively secured to the first and second rows of cylinders, and a Stage 2 package with a turbo exhaust manifold adapted for mounting a turbocharger, and also adapted to be secured to the first row of cylinders in lieu of the first exhaust manifold, and a crossover pipe assembly adapted for coupling the turbo exhaust manifold to the second exhaust manifold.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: September 1, 2020
    Assignee: 500 Group, Inc.
    Inventors: Paolo Tiramani, Kyle Denman
  • Patent number: 10760520
    Abstract: Methods and systems are described for controlling fuel injection in an engine equipped with a dual injector system including a port injector and a direct injector. A ratio of port injected fuel to direct injected fuel is adjusted based at least on intake valve temperature. The proportion of fuel port injected into a cylinder is increased as the intake valve temperature for the given cylinder increases to improve fuel vaporization in the intake port.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: September 1, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Gopichandra Surnilla, Eric Krengel, Joseph Lyle Thomas, Todd Anthony Rumpsa, Michael Howard Shelby
  • Patent number: 10753263
    Abstract: An exhaust device of a turbocharger vehicle includes: a catalyst converter diagonally arranged in a vertical direction toward the ground as being connected with an outlet of a streamlined exhaust connecting pipe which is bent at 95° or more, wherein the streamlined exhaust connecting pipe is connected between an outlet of a turbocharger and the catalytic converter.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: August 25, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Chun Soon Jang
  • Patent number: 10731531
    Abstract: An internal combustion engine 1 is provided, in an exhaust passage thereof with an electrochemical reactor including: an ion conductive solid electrolyte layer; an anode layer arranged on a surface of the solid electrolyte layer; and a cathode layer arranged on a surface of the solid electrolyte layer and able to hold NOX. The engine includes a current control device for controlling the current supplied to the electrochemical reactor so as to flow from the anode layer through the solid electrolyte layer to the cathode layer. The current control device is configured so as to supply current to the electrochemical reactor at least temporarily while that internal combustion engine is stopped.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: August 4, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keishi Takada, Tetsuya Sakuma, Hiromasa Nishioka, Hiroshi Otsuki, Hirohito Hirata, Yoshiyuki Sakamoto, Tsuyoshi Hamaguchi, Chika Kato, Yuji Sakakibara, Takashi Kuzuya
  • Patent number: 10725921
    Abstract: The present invention provides a method and system for caching time series data. A computer system for caching time series data is disclosed. The computer system comprises one or more processors, at least one cache, and a computer readable storage medium. The computer readable storage medium contains instructions that, when executed by the one or more processors, causes the one or more processors to perform a set of steps comprising fetching the time series data from a time series data source, calculating one or more expiry timestamps, grouping the plurality of time series datum in to one or more time data chunks based on the one or more expiry timestamps, and storing a copy of the time series data and the one or more expiry timestamps in the at least one cache.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: July 28, 2020
    Assignee: InMobi PTE Ltd.
    Inventor: Arvind Jayaprakash
  • Patent number: 10712323
    Abstract: An electronic central unit is configured to control a voltage application device to execute applied voltage sweep and obtain an output current that flows between a first electrode and a second electrode of an electrochemical cell. The electronic control unit is configured to detect either one of presence or absence of sulfur oxides in a specified concentration or higher in exhaust gas and a concentration of sulfur oxides in the exhaust gas based on the output current. The electronic control unit is configured to execute one of a specified determination and a specified detection based on a specified parameter. Accordingly, it is possible to accurately determine the presence or the absence of sulfur oxides in the specified concentration or higher that are contained in exhaust gas or detect the concentration of sulfur oxides in the exhaust gas.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: July 14, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keiichiro Aoki, Keigo Mizutani, Kazuhiro Wakao, Kazuhisa Matsuda
  • Patent number: 10690078
    Abstract: A system and method is provided for estimating engine exhaust nitrogen oxide sensor signal instability in transient conditions, for example when rapid changes occur in driver demanded torque, and for eliminating fluctuations in EONOx sensor signal status, in order to have more robust on-board diagnostics monitoring and exhaust nitrogen oxide control. The system and method predicts EONOx sensor signal instability by comparing a calculated pedal based driver demand torque delta to calculated instability thresholds and instability threshold hysteresis margins, and generates instability flags. The system and method further validates any predicted EONOx sensor signal instability by observation. Upon validation of the predicted EONOx sensor signal instability, the system and method latches the EONOx sensor signal status to a stable value.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: June 23, 2020
    Assignee: International Engine Intellectual Property Company, LLC
    Inventors: Askin Minaz, Robert Manoni
  • Patent number: 10683822
    Abstract: In certain embodiments, a method and an apparatus which can be implemented with a simplified and inexpensive configuration without causing a misfire in a combustion state. In a fuel-Cetane-number estimation method according to embodiments, a map which specifies a relationship between the Cetane number and a control parameter at which NOx concentration of exhaust gas reaches a predetermined value is prepared in advance. Then, the control parameter is controlled variably to detect transition of the NOx concentration of the exhaust gas of the internal combustion engine, and thereby the control parameter of the internal combustion engine at which the NOx concentration has reached the predetermined value is obtained, and the Cetane number which corresponds to the obtained control parameter is estimated on the basis of the map.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: June 16, 2020
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventor: Takayuki Yamamoto
  • Patent number: 10677128
    Abstract: Provided is an exhaust purification system including: an NOx occlusion reduction type catalyst that is provided in an exhaust system of an internal combustion engine, and occludes NOx when an exhaust gas is in a lean state, and reduces the NOx when the exhaust gas is in a rich state; a regeneration control unit that executes a regeneration process of bringing the exhaust gas into a rich state to reduce the NOx occluded in the NOx occlusion reduction type catalyst; a storing unit that stores an exhaust lambda prediction value in advance when the regeneration process is executed; a reduction amount estimating unit that estimates an NOx reduction amount when the regeneration process is executed; and a prohibition unit that prohibits the execution of the regeneration process by the regeneration control unit when the estimated NOx reduction amount is less than a predetermined lower limit threshold.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: June 9, 2020
    Assignee: ISUZU MOTORS LIMITED
    Inventors: Teruo Nakada, Takayuki Sakamoto, Daiji Nagaoka, Hiroyuki Yuza
  • Patent number: 10669916
    Abstract: In a construction in which a turbine and an exhaust gas purification catalyst are arranged close to each other, and in which an exhaust gas sensor is arranged in an exhaust passage between the turbine and the exhaust gas purification catalyst, the exhaust gas sensor is suppressed from getting wet with condensed water. In an exhaust system for an internal combustion engine, an exhaust gas sensor is arranged in a circumferential direction of a specific exhaust passage in a position except a range which is reached by a bypass exhaust gas carried away by a turbine swirling flow.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: June 2, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Koichi Kimura, Yasuyuki Irisawa, Takashi Tsunooka
  • Patent number: 10669961
    Abstract: An exhaust purification system of an internal combustion engine comprises an air-fuel ratio control device controlling an air-fuel ratio of the inflowing exhaust gas to a target air-fuel ratio. If a first judged condition wherein an estimated amount of change of an oxygen storage amount of the catalyst when the target air-fuel ratio is maintained at the first set air-fuel ratio is equal to or greater than a first reference amount, and a second judged condition wherein a difference of an air-fuel ratio detected by the upstream side air-fuel ratio sensor and a stoichiometric air-fuel ratio is equal to or greater than a difference of a second judged air-fuel ratio and a stoichiometric air-fuel ratio are satisfied, the air-fuel ratio control device switches the target air-fuel ratio from the first set air-fuel ratio to the second set air-fuel ratio when the first judged condition and second judged condition are satisfied.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: June 2, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenji Inoshita, Shogo Tanaka, Norihisa Nakagawa
  • Patent number: 10663444
    Abstract: Evaluation method of exhaust gas simulation capable of simply and appropriately evaluating the validity of the simulation is provided. In analysis data, an analysis amplitude curve is calculated in which a change in the concentration of virtual exhaust gas at the observation point in the converged pipe portion is plotted, and an analysis time interval between the zero point and the reference point in the analysis amplitude curve is plotted. In actual measurement data, an actual amplitude curve is provided in which a change in the specific gas component at an observation point is measured with time, and an actual time interval is provided in which a time interval from a zero point to a reference point in the actual amplitude curve. The analysis data is determined as valid when a difference between the analysis time interval and the actual time interval is within a predetermined correlation range.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: May 26, 2020
    Assignee: DENSO CORPORATION
    Inventor: Naohiro Hayashi
  • Patent number: 10626815
    Abstract: The internal combustion engine comprises an exhaust purification catalyst and downstream side air-fuel ratio sensor. The control system performs feedback control so that the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst becomes a target air-fuel ratio and performs learning control which corrects the control center air-fuel ratio based on the output air-fuel ratio of the downstream side air-fuel ratio sensor. The target air-fuel ratio is switched between the lean air-fuel ratio and the rich air-fuel ratio. In the learning control, when the target air-fuel ratio is set to the rich air-fuel ratio and the output air-fuel ratio of the downstream side air-fuel ratio sensor is maintained in an air-fuel ratio region in proximity to the stoichiometric air-fuel ratio for the stoichiometric air-fuel ratio judgment time or more, stoichiometric air-fuel ratio stuck learning is performed, changing air-fuel ratio of the exhaust gas to the rich side.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: April 21, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shuntaro Okazaki, Norihisa Nakagawa, Yuji Yamaguchi
  • Patent number: 10598073
    Abstract: An exhaust system includes a turbine housing and an air-fuel ratio sensor. The turbine housing includes a first collecting exhaust pipe including a first passage, a second collecting exhaust pipe including a second passage, and a junction exhaust pipe including a junction passage. The first passage and the second passage are arranged in parallel. When an inner wall forming the junction passage is defined into a first continuous inner wall and a second continuous inner wall, the air-fuel ratio sensor is provided in the first continuous inner wall so as to protrude toward the center of the junction passage. A guide portion that protrudes toward the center of the junction passage is provided in the first continuous inner wall on the upstream side of the air-fuel ratio sensor.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: March 24, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Minoru Hideshima, Noritaka Yamamoto
  • Patent number: 10591386
    Abstract: An emission control system, such as an emission control system for a diesel engine, which includes both a NOx sensor and an electrostatic Particulate Matter (ePM) sensor, and uses the signal from the ePM sensor to determine when it is safe to activate and heat up the NOx sensor after engine ignition. This is performed as soon as moisture clears the exhaust, without having to wait any additional time as a safety factor to maximize the reliability of the NOx sensor against damage from water thermal shock. It also allows for a higher degree of application flexibility for a specific engine and aftertreatment combination to be used in a variety of vehicle applications, environmental conditions, and vehicle operating profiles.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: March 17, 2020
    Assignee: Continental Automotive Systems, Inc.
    Inventor: John Patrick Schuster
  • Patent number: 10578038
    Abstract: Methods and systems are provided for controlling and coordinating control of a post-catalyst exhaust back pressure valve and secondary air injection to expedite catalyst heating. By adjusting the exhaust back pressure valve to increase the exhaust backpressure and injecting secondary air into an exhaust passage upstream of the catalyst during cold start conditions, exhaust catalyst activation may be expedited.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: March 3, 2020
    Assignee: Ford Global Technologies, LLC
    Inventor: Thomas G. Leone
  • Patent number: 10578039
    Abstract: A proactive heating system for a vehicle, which is used to increase the temperature of an exhaust catalyst prior to ignition of an engine to reduce emissions. The proactive heating system is part of an exhaust system for a vehicle, and includes an electrically heated catalyst and an air pump, which are activated prior to engine ignition, to increase the temperature of a three-way catalyst such that the three-way catalyst is at the desired target threshold temperature, or light-off temperature, prior to engine ignition, eliminating the delay in emissions treatment after cold-start of the engine. The proactive heating system addresses the high level of untreated emissions emitted from an internal combustion engine before the catalytic emissions system reaches the light-off temperature. The proactive heating system provides heating of a catalyst to light-off temperature without combusting hydrocarbon fuel, which leads to engine out emissions.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: March 3, 2020
    Assignee: Continental Automotive Systems, Inc.
    Inventors: Brian McKay, Ben Bargman
  • Patent number: 10578044
    Abstract: Disclosed is a method for diagnosis of an oxygen probe for a combustion engine, with the steps: When an engine's fuel injection is inactive, measuring the output electric voltage from the oxygen probe; If the measured output electrical voltage of the oxygen probe is greater than a predetermined minimum voltage threshold, measuring a pressure prevailing in an intake distributor of the engine; If the measured pressure in the intake distributor is less than a predetermined minimum pressure threshold, increasing the pressure to a value greater than the predetermined minimum pressure threshold; Determining the time period between the time when the output electrical voltage of the probe falls below a second predetermined voltage threshold and the time when the output electrical voltage of the probe falls below a third predetermined voltage threshold; and diagnosing the oxygen probe depending on elapsed the time period.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: March 3, 2020
    Assignee: CONTINENTAL AUTOMOTIVE FRANCE S.A.S.
    Inventors: Bastien Elmerich, Frèdèric Cousin, Thomas Mauge, Alexandre Jhean
  • Patent number: 10563596
    Abstract: An internal combustion engine-based system includes an internal combustion engine. The internal combustion engine-based system includes an engine interrupt connected to the engine. The engine interrupt is configured to selectively stop the operation of the engine. The internal combustion engine-based system includes a controller in communication with the engine interrupt. The internal combustion engine-based system includes a carbon monoxide detector in communication with the controller. The controller uses the engine interrupt to stop the operation of the engine when the carbon monoxide detector provides the controller with signals that are representative of a carbon monoxide level proximate the internal combustion engine that together form a trend of building carbon monoxide amounts over a set time interval.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: February 18, 2020
    Assignee: Generac Power Systems, Inc.
    Inventors: Gregory A. Wischstadt, Adam M. Schroeder, Mitchell L. Horn, Brandon Schmidt, Kevin Cole, Tod R. Tesch
  • Patent number: 10539058
    Abstract: An aftertreatment system comprises a SCR system including at least one catalyst. A NOx sensor is positioned downstream of the SCR system. A controller is configured to determine an estimated engine NOx amount in the exhaust gas produced by an engine fluidly coupled to the aftertreatment system. The controller interprets an output value indicative of a first amount of oxygen in the exhaust gas downstream of the SCR system. The controller determines an adjusted engine NOx amount in response to the output value. A NOx sensor is positioned downstream of the selective catalytic reduction system and communicatively coupled to the controller. The NOx sensor is structured to provide the output value.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: January 21, 2020
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Sriram Srinivasan, Nassim Khaled, Priya Naik
  • Patent number: 10519840
    Abstract: An object of the disclosure is to provide a technology that enables abnormality diagnosis of an NOx trap catalyst to make the diagnosis that the NOx trap catalyst is abnormal even if the degree of deterioration of the NOx trap catalyst is relatively small yet. When performing abnormality diagnosis of an NOx trap catalyst, a system according to the disclosure performs a lean temperature raising process, which is the process of raising the temperature of the NOx trap catalyst to or above a predetermined temperature while keeping the air-fuel ratio of the exhaust gas flowing into the NOx trap catalyst at a lean air-fuel ratio. The system diagnoses abnormality of the NOx trap catalyst on the basis of the NOx storage efficiency of the NOx trap catalyst or a parameter correlating with that NOx storage efficiency after the completion of the lean temperature raise process.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: December 31, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuya Takaoka, Toru Kidokoro
  • Patent number: 10480368
    Abstract: Methods and systems are provided for differentiating an exhaust air leak from a catalyst monitor sensor degraded with a slow-response. In one example, a pressure proximate an exhaust system particulate filter less than a threshold pressure may indicate an exhaust air leak and responsive to the indication of the exhaust air leak, the thresholds for monitoring the catalyst monitor sensor response may be adjusted. In this way, the impact of an exhaust air leak on catalyst monitor output may be accounted for so that subsequent monitoring for threshold catalyst may continue to be performed accurately in the presence of an exhaust air leak.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: November 19, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Mario Anthony Santillo, Michael James Uhrich, Joseph Norman Ulrey, Andrew Bagnasco, Michael Casedy
  • Patent number: 10464550
    Abstract: A control device executes abnormality detection processing for detecting an abnormality of a current sensor. The abnormality detection processing includes first processing which is executed in a case where, during reception of electric power from a power supply, a state of charge of a power storage device is equal to or greater than a predetermined amount and electric power is supplied to an electrically heated catalyst device. The first processing includes processing for detecting an abnormality of the current sensor by estimating a current supplied to the electrically heated catalyst device using a detection value of a charging current sensor and comparing the estimated value with a detection value of the current sensor.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: November 5, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keita Hashimoto, Takahiro Suzuki
  • Patent number: 10443577
    Abstract: A wind power generation system includes one or both of a memory or storage device storing one or more processor-executable executable routines, and one or more processors configured to execute the one or more executable routines which, when executed, cause acts to be performed. The acts include receiving weather data, wind turbine system data, or a combination thereof; transforming the weather data, the wind turbine system data, or the combination thereof, into a data subset, wherein the data subset comprises a first time period data; selecting one or more wind power system models from a plurality of models; transforming the one or more wind power system models into one or more trained models at least partially based on the data subset; and executing the one or more trained models to derive a forecast, wherein the forecast comprises a predicted electrical power production for the wind power system.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: October 15, 2019
    Assignee: General Electric Company
    Inventors: Krishna Kumar Swaminathan, Deepak Raj Sagi, Pritesh Jain, Sridhar Dasaratha, Nitika Bhaskar, Rahul Kumar Srivastava, Milesh Shrichandra Gogad
  • Patent number: 10443470
    Abstract: Nitrogen oxide multiplexing systems are provided. Various embodiments provide for systems comprising an aftertreatment component configured to treat exhaust exiting an engine, a sensor, a conduit, and a switching device. The sensor is configured to detect nitrogen oxide in the exhaust from both upstream of and downstream of an aftertreatment component. The conduit has a first end positioned upstream of the aftertreatment component and a second end communicable with the sensor positioned downstream of the aftertreatment component. The conduit receives a sample of the exhaust flowing from upstream of the aftertreatment component through the first end and delivers the sample of the exhaust to the sensor through the second end. The switching device is connected to the conduit and configurable to selectively prevent the flow of exhaust upstream of the aftertreatment component from reaching the sensor.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: October 15, 2019
    Assignee: Cummins Emission Solutions, Inc.
    Inventor: Dale G. Gibby
  • Patent number: 10436142
    Abstract: Methods and systems for evaluating whether or not a fuel amount that is greater than a threshold has been release to an engine via fuel injectors when the fuel injectors are commanded off are presented. In one example, an oxygen sensor is activated and engine cranking is prevented until a pumping current of the oxygen sensor is proportionate to a concentration of oxygen sensed via the oxygen sensor so that released fuel may be observed during engine starting.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: October 8, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Joseph Ulrey, Michael Uhrich, Ross Pursifull, Steven Schwochert
  • Patent number: 10428715
    Abstract: Disclosed is an exhaust gas analyzing system which includes a main flow passage provided with a PM collection filter, a diluted exhaust gas sampling flow passage connected upstream of the PM collection filter of the main flow passage for sampling a part of diluted exhaust gas, a diluted exhaust gas flow rate adjusting mechanism connected downstream of the PM collection filter of the main flow passage, and control equipment altering a setting flow rate of the diluted exhaust gas flow rate adjusting mechanism depending on a flow rate of sampling diluted exhaust gas flowing through the diluted exhaust gas sampling flow passage.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: October 1, 2019
    Assignee: HORIBA, LTD.
    Inventor: Yoshinori Otsuki
  • Patent number: 10422265
    Abstract: An exhaust gas purifying system includes a differential pressure detector that detects a differential pressure between an inlet/outlet of a filter, a flow rate detector that detects a flow rate of exhaust gas in the filter, a differential based-deposition-amount calculator that calculates a differential-based deposition amount of particulate matters in the filter based on detection results of the differential pressure detector and the flow rate detector, a regeneration temperature setting unit that sets a regeneration processing temperature of the filter based on the calculated differential-based deposition amount, and a regeneration processing unit that performs a regeneration processing of the filter based on the set regeneration processing temperature.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: September 24, 2019
    Assignee: Komatsu Ltd.
    Inventors: Nobuaki Motegi, Yuta Okubo, Satoshi Nakazawa, Shinichi Saitou
  • Patent number: 10401273
    Abstract: A particle detection system (1) includes a particle sensor (10) having a detection section (11) exposed to a gas under measurement EG. The particle sensor (10) includes an insulating member (121, 100), and a heater section (150, 105) for heating at least a portion of the gas contact surface (121s, 101s) of the insulating member (121, 100). The particle detection system (1) includes adhesive restraining energization means (225, 223, S4, S10) for heating the gas contact surface (121s, 101s) to an adhesion restraining temperature Td at which adhesion of the particles S to the gas contact surface (121s, 101s) is restrained as compared with the case where the heater section is not energized, wherein adhering particles SA which are particles adhering to the gas contact surface (121s, 101s) burn at the particle burning temperature Tb.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: September 3, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Takeshi Sugiyama, Masayuki Motomura, Norimasa Osawa, Hirokazu Murase
  • Patent number: 10393000
    Abstract: A failure determination apparatus for an oxygen concentration sensor disposed downstream of a catalyst provided in an exhaust system is provided for detecting a failure in the oxygen concentration sensor. The failure determination apparatus comprises: a failure determination device for determining a failure in the oxygen concentration sensor based on the length of a period when the output of the oxygen concentration sensor passes through a predetermined output section during enrichment control after a fuel cut mode of the internal combustion engine is released; a rich fuel supply amount calculation device for calculating the time average of an enriching fuel supply amount, relative to a fuel supply amount necessary for stoichiometric combustion, based on an actual fuel supply amount during the enrichment control; and a failure determination restriction device for restricting failure determination of the failure determination device based on the time average of the enriching fuel supply amount.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: August 27, 2019
    Assignee: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
    Inventors: Kenta Imaoka, Junya Kitada, Hideo Matsunaga
  • Patent number: 10376871
    Abstract: A device for purifying exhaust gas provided to purify exhaust gas in an engine, may include an exhaust line through which exhaust gas discharged from the engine passes, a NOx storage catalyst that is installed in the exhaust line to absorb a nitrogen oxide discharged from the exhaust gas, and detach an absorbed nitrogen oxide when a temperature of a catalyst is higher than a predetermined value, and a three way catalyst (TWC) arranged in rear of the NOx storage catalyst for reducing the nitrogen oxide detached from the NOx storage catalyst, wherein the NOx storage catalyst includes an LTA zeolite catalyst.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: August 13, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Yoon Sang Nam, Hyokyung Lee
  • Patent number: 10371038
    Abstract: A connection piece assembly unit, especially for an exhaust gas treatment device of an exhaust system of an internal combustion engine, includes a connection piece (30) with a base area (32) for fixing the connection piece (30) to a carrier assembly unit. A covering element (40) projects over an outside (42) of the connection piece (30).
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: August 6, 2019
    Assignee: EBERSPÄCHER EXHAUST TECHNOLOGY GMBH & CO. KG
    Inventors: Dan Liu, Peter Kast