Patents Examined by Matthew T Largi
  • Patent number: 11384676
    Abstract: A method for the onboard diagnosis in a vehicle having a catalytic convertor and a lambda-controlled internal combustion engine in the running operation of the vehicle, includes determining the currently maximum possible oxygen storage capacity of the catalytic convertor as well as a measured temporal duration between the lean spike of the pre-catalyst lambda probe and the post-catalyst lambda probe takes place by means of an OSC diagnosis. The method also includes determining a theoretical residual oxygen content and determining a theoretical temporal duration. When the quotient between the measured temporal duration (?t) and the theoretical temporal duration (?ttheo) lies within a predefined range delimited by a first and a second threshold value (SW1; SW2), thus: SW ? ? 1 ? ? ? ? t ? ? ? t theo ? SW ? ? 2 , it is determined that the pre-catalyst lambda probe and the post-catalyst lambda probe operate without flaw.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: July 12, 2022
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Sebastian Grasreiner
  • Patent number: 11384674
    Abstract: A reuse evaluation system is a system that performs an evaluation to reuse a catalyst in a state where the catalyst that purifies an exhaust gas of an engine of a vehicle 1 is mounted on the vehicle. The reuse evaluation system includes a deterioration estimator that estimates a degree of deterioration of the catalyst based on an operating state of the vehicle, a reuse setting unit that sets a range of the degree of deterioration of the catalyst as a reuse range of the catalyst according to a usage of reuse of the catalyst, and a reuse determining unit that determines that the catalyst is reusable in the reuse usages when the degree of deterioration of the catalyst estimated by the deterioration estimator is within the reuse range set by the reuse setting unit.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: July 12, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tsuyoshi Okada, Masaru Kakinohana, Fukutaroh Mori, Shogo Shirakawa, Yuriko Takahashi, Masashi Nose
  • Patent number: 11384677
    Abstract: A state estimation apparatus includes: a rate calculating configured to calculate, based on both a flow rate and an air-fuel ratio of exhaust gas flowing into an oxygen storage catalyst, a rate of change in an oxygen storage amount in the oxygen storage catalyst; a limit calculating unit configured to calculate a limit rate which is a limit value for the rate of change; and a storage-amount updating unit configured to update, based on the rate of change and the limit rate, an estimated value of the oxygen storage amount. Moreover, the storage-amount updating unit is further configured to: update, when the rate of change does not exceed the limit rate, the estimated value based on the rate of change; and update, when the rate of change exceeds the limit rate, the estimated value based on the limit rate.
    Type: Grant
    Filed: June 11, 2021
    Date of Patent: July 12, 2022
    Assignee: DENSO CORPORATION
    Inventors: Hiroshi Suzuki, Yasuhiro Kawakatsu
  • Patent number: 11377992
    Abstract: The invention relates to a method for regenerating a particulate filter in the exhaust gas channel of an internal combustion engine. Here, the particulate filter is divided into several zones for determining the loading state, and, at the same time, a temperature distribution over the cross section of the particulate filter is determined. In order to prevent the soot retained in the edge zones of in the particulate filter from being insufficiently oxidized, when it is ascertained that the edge zones have been sufficiently loaded, the exhaust gas temperature is raised to a temperature which, in spite of the heat losses in the edge areas, lies above the temperature at which oxidation of the soot particles can take place. The invention further relates to an internal combustion engine having an exhaust gas channel and a particulate filter arranged in the exhaust gas channel, said internal combustion engine being configured to carry out such a method.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: July 5, 2022
    Assignee: VOLKSWAGEN AKTIENGESELLSCHAFT
    Inventors: Stefan Paukner, Falk-Christian Baron Von Ceumern-Lindenstjerna
  • Patent number: 11365659
    Abstract: An ECU 10 for controlling execution of forced regeneration that removes PM deposited on a DPF by increasing a temperature of the DPF in an exhaust gas treatment device of a diesel engine including a DOC disposed in an exhaust passage and the DPF disposed downstream of the DOC includes: a determination unit 102 for determining whether an injection start condition corresponding to a remaining SOF deposition amount on the DOC is satisfied after the forced regeneration starts and after an upstream temperature of the DOC reaches a predetermined temperature; and an injection execution unit 104 for starting late-post injection of fuel to the DOC when the injection start condition is satisfied.
    Type: Grant
    Filed: August 14, 2019
    Date of Patent: June 21, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Kazuki Nishizawa, Daisuke Sato
  • Patent number: 11359527
    Abstract: Disclosed is a method for control of an activation of a fluid sensitive sensor of an exhaust treatment system arranged for treating an exhaust stream, which includes: determining an exhaust temperature and an exhaust mass flow for the exhaust stream; determining if there is liquid fluid present in the exhaust stream at the fluid sensitive sensor, respectively, based on: 1) an elimination time function, wherein the elimination time function is based on the determined exhaust temperature and the determined exhaust mass flow; and 2) a corresponding lengths of a time period needed to eliminate a predetermined amount of liquid fluid from the exhaust stream; and controlling an activation of said fluid sensitive sensor based on the determination of if there is liquid fluid present in the exhaust treatment system at the fluid sensitive sensor.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: June 14, 2022
    Assignee: Scania CV AB
    Inventors: Robin Van Trigt, Gilfredo Remon
  • Patent number: 11359529
    Abstract: A system and method for controlling an aftertreatment assembly includes a diesel oxidation catalyst (DOC) device configured to receive an exhaust gas. One or more sensors are configured to obtain respective sensor data relative to the exhaust gas and DOC device. A controller is in communication with the sensors and configured to obtain respective sensor data relative to the exhaust gas. The controller is configured to determine if one or more enabling conditions are met, including reaching a predefined temperature range in the DOC device. A rich event is induced targeting a predetermined range of a lambda value for a predefined maximum time duration. When the rich event has ended, an exotherm index is obtained for an observation window immediately after the rich event. The controller is configured to control operation of the aftertreatment assembly based at least partially on the exotherm index.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: June 14, 2022
    Assignee: GM Global Technology Operations LLC
    Inventors: Marco Sculto, Claudio Ciaravino, Luisa Cusanno
  • Patent number: 11359532
    Abstract: An exhaust aftertreatment system includes a catalyst, an exhaust conduit system, a first sensor, a second sensor, a reductant pump, a dosing module, and a reductant delivery system controller. The exhaust conduit system is coupled to the catalyst. The first sensor is coupled to the exhaust conduit system upstream of the catalyst and configured to obtain a current first measurement upstream of the catalyst. The second sensor is coupled to the exhaust conduit system downstream of the catalyst and configured to obtain a current second measurement downstream of the catalyst. The reductant pump is configured to draw reductant from a reductant source. The dosing module is fluidly coupled to the reductant pump and configured to selectively provide the reductant from the reductant pump into the exhaust conduit system upstream of the catalyst. The reductant delivery system controller is communicable with the first sensor, the second sensor, the reductant pump, and the dosing module.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: June 14, 2022
    Assignee: CUMMINS EMISSION SOLUTIONS INC.
    Inventors: Jinqian Gong, Arun Kumar Dasari, Gautam Sharma
  • Patent number: 11352941
    Abstract: A rotary engine that starts and operates on compression-ignition of a heavy fuel without a secondary ignition source. The rotary engine includes a rotor housing that forms an epitrochoidal-shaped chamber having linear side portions extending between rounded end portions. A three-flanked rotor is disposed in the chamber to rotate and operate in a manner similar to that of a common Wankel-style rotary engine. The rotor and chamber are configured to provide a compression ratio sufficient to produce compression-ignition of a heavy fuel. The rotor includes apex seal and side seal mounting blocks formed from hardened materials and that are simply removable from the rotor for replacing apex and side seals. The apex seals may include multiple non-parallel seal members at each apex and the apex seals and the side seals may overlap or intersect a corner seal to increase sealing under high compression loads produced by the rotor/chamber configuration.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: June 7, 2022
    Assignee: Rotary Research Group LLC
    Inventors: P. Tyson Garvin, Timothy C. Stamps
  • Patent number: 11352923
    Abstract: A diagnostic system (10) is provided and includes a sensor (24) disposed downstream from an exhaust gas aftertreatment system. Also included in the diagnostic system (10) is a central diagnostic unit (35) configured to diagnose a condensation condition associated with the sensor (24) for mitigating a sensor failure due to water condensation on the sensor (24), the central diagnostic unit (35) performing the diagnosis on the condensation condition based on water storage and release information related to a component of the exhaust gas aftertreatment system. The sensor (24) is activated based on the water storage and release information.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: June 7, 2022
    Assignee: CUMMINS INC.
    Inventors: Saurabh Y. Joshi, Neal W. Currier, Aleksey Yezerets, Ashok Kumar, Tyler A. Rash, Anand Srinivasan, Di Wang, Yadan Tang
  • Patent number: 11346294
    Abstract: In a method for operating an internal combustion engine of a motor vehicle, exhaust gas from the internal combustion engine is fed to a particulate filter of the motor vehicle. Until a predetermined filtration rate of the particulate filter is reached, a temporary interruption of a fuel supply to the internal combustion engine is prevented in an overrun mode of the motor vehicle if a temperature of the exhaust gas in the particulate filter is greater than a predetermined threshold value of the temperature. An arrangement of the particulate filter in an exhaust system of the motor vehicle is also described.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: May 31, 2022
    Assignee: Daimler AG
    Inventors: Julius Schwaab, Peter Lanzerath
  • Patent number: 11339695
    Abstract: The exhaust purification system of an internal combustion engine comprises a catalyst 20 arranged in an exhaust passage and able to store oxygen, and an air-fuel ratio control device configured to control an air-fuel ratio of inflowing exhaust gas flowing into the catalyst. The catalyst has a precious metal and the precious metal has a property of a vapor pressure at a predetermined temperature becoming lower when oxidized. If a temperature of the catalyst is equal to or greater than a threshold temperature or if predicting a rise in temperature of the catalyst, the air-fuel ratio control device is configured to make the air-fuel ratio of the inflowing exhaust gas leaner than a stoichiometric air-fuel ratio so that an oxygen storage amount of the catalyst becomes equal to or greater than an upper side reference amount.
    Type: Grant
    Filed: November 16, 2020
    Date of Patent: May 24, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroyoshi Ueda, Kazuhiro Umemoto
  • Patent number: 11333091
    Abstract: A method of raising exhaust gas temperatures of a two-cycle uniflow scavenged engine at lower loads. At lower loads, the exhaust valves are activated with a frequency that is less frequent than every engine cycle. This exhaust valve deactivation may be combined with additional engine operating strategies, such as by using fewer than all cylinders as combusting cylinders, adjusting fueling to combusting cylinders, and reducing compressor output.
    Type: Grant
    Filed: October 12, 2020
    Date of Patent: May 17, 2022
    Assignee: Yelir, Inc.
    Inventors: Michael B. Riley, John Craig Hedrick, Steven Gerard Fritz
  • Patent number: 11333053
    Abstract: A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller includes an aftertreatment system monitor and a firing timing determination unit. The aftertreatment monitor obtains data relating to a temperature of one or more aftertreatment elements, such as a catalytic converter. Based at least partly on this data, the firing timing determination unit generates a firing sequence for operating the engine in a skip fire manner such that the temperature of the aftertreatment element is controlled within its effective operating range.
    Type: Grant
    Filed: June 14, 2021
    Date of Patent: May 17, 2022
    Assignee: Tula Technology, Inc.
    Inventors: Matthew A. Younkins, Shikui Kevin Chen, Mark A. Wilcutts
  • Patent number: 11326496
    Abstract: An ECU stores and holds in a memory unit NOx information which is information concerning NOx in an exhaust gas flowing through an exhaust system of an onboard engine of a vehicle or NOx purification by a catalyst placed in the exhaust system. The ECU includes a parameter acquisition unit that acquires an NOx parameter, which is an outflow quantity of NOx flowing out to a downstream side of the catalyst or a correlation value correlating to the outflow quantity of NOx, according to a working state of the engine, an integrated value computation unit that computes a parameter integrated value by integrating NOx parameters acquired by the parameter acquisition unit, and a storage processing unit that stores in the memory unit the parameter integrated value as the NOx information.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: May 10, 2022
    Assignee: DENSO CORPORATION
    Inventor: Satoru Osaki
  • Patent number: 11319853
    Abstract: An exhaust aftertreatment system for use with over-the-road vehicle is disclosed. The exhaust aftertreatment system includes a reducing agent mixer with a mixing can and a doser configured to inject heated and pressurized reducing agent into the mixing can for distribution throughout exhaust gases passed through the mixing can.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: May 3, 2022
    Assignee: Faurecia Emissions Control Technologies, USA, LLC
    Inventors: Edward C. Kinnaird, John Rohde, Tony Parrish, Atul Shinde, Madhuri Gandikota
  • Patent number: 11313267
    Abstract: A particulate matter sensor includes a sensor element that includes a measurement member and a heater. An anomaly determiner performs determination that there is a break fault in a signal path of the measurement signal in response to both: (1) A first determiner, which determines whether a first measurement value of the measurement signal is higher than or equal to a predetermined normal determination threshold while the measurement voltage is applied between the measurement electrodes and the temperature of the measurement member is controlled at a first determination temperature, making a negative determination; and (2) A second determiner, which performs negative determination while the measurement voltage is applied between the measurement electrodes and the temperature of the measurement member is controlled within a predetermined temperature range that is higher than the first determination temperature and lower than a second determination temperature, making a negative determination.
    Type: Grant
    Filed: August 3, 2021
    Date of Patent: April 26, 2022
    Assignee: DENSO CORPORATION
    Inventors: Mikiyasu Matsuoka, Tomoo Kawase, Toshiyuki Ishii
  • Patent number: 11300026
    Abstract: A skip fire engine controller and method of control is described wherein during transitions from a first firing density to a second firing density, a firing density and a pumping density are separately set so as to balance the conflicting demands of (a) torque control, (b) Noise, Vibration and Harshness (NVH), (c) air flow through the engine and (d) air-fuel ratio.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: April 12, 2022
    Assignee: Tula Technology, Inc.
    Inventors: Shikui Kevin Chen, Matthew A. Younkins, Louis J. Serrano
  • Patent number: 11300065
    Abstract: A control unit (8) calculates a temperature difference (?Tg). The temperature difference (?Tg) is a value obtained by subtracting the temperature (Tg) of a GPF (22) from a target GPF temperature (Tgt). If the temperature difference (?Tg) is less than or equal to zero, the control unit (8) implements a fuel economy-oriented conventional control. If the temperature difference (?Tg) is greater than zero, the control unit (8) implements a filter temperature-increasing control. The filter temperature-increasing control causes the exhaust temperature to be increased so that the temperature (Tg) of the GPF (22) becomes greater than or equal to the target GPF temperature (Tgt).
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: April 12, 2022
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Tomohiro Sakata, Futoshi Yoshimura, Yoshihiko Iwabuchi
  • Patent number: 11293320
    Abstract: Provided is a control device configured to be able to execute a forced regeneration process in an engine which includes a DOC and DPF disposed in an exhaust passage of the engine, and a temperature increase unit including an exhaust throttle valve, for increasing a temperature of each of the DOC and the DPF. The forced regeneration process includes a first temperature increase process of controlling the temperature increase unit such that the temperature of the DOC is increased to a first temperature, and a second temperature increase process of controlling the temperature increase unit such that the temperature of the DPF is increased to a second temperature which is higher than the first temperature after completion of the first temperature increase process.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: April 5, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Daisuke Sato, Mizuki Kanai, Kazuki Nishizawa