Automatic Or Timed Reactor Purge Or Heat-up In Engine Starting Operation Patents (Class 60/284)
  • Patent number: 9863349
    Abstract: In an exhaust gas control system for an internal combustion engine operable at a lean air-fuel ratio, after a request to stop the internal combustion engine has been issued, the internal combustion engine is operated at a stoichiometric air-fuel ratio or lower until an air-fuel ratio in an SCR catalyst becomes lower than or equal to the stoichiometric air-fuel ratio, and then supply of fuel to the internal combustion engine is stopped.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: January 9, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takayoshi Tanaka, Yoshihisa Shinoda
  • Patent number: 9850793
    Abstract: An automatic regeneration controller for a particular filter comprises an engine controller, a unit controller, and a load application cancellation switch. With filter regeneration being started by determination of particulate accumulation and with an idling or light-load operation being conducted, load request to a work unit is outputted from the engine controller to the unit controller. Then, when load application is not possible or the load application cancellation switch is on and, in addition, exhaust temperature is not maintainable with no load application, a regeneration stop signal is outputted from the unit controller to the engine controller and a regeneration stop signal reception process is conducted in the engine controller, and with no forced load application to a hydraulic unit, fuel addition is stopped to stop automatic regeneration control.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: December 26, 2017
    Assignee: HINO MOTORS, LTD.
    Inventors: Kenji Miyoshi, Akihito Roppongi, Masaru Hironaka
  • Patent number: 9850840
    Abstract: An electronic control unit (ECU) of an internal combustion engine, which includes an air-fuel ratio sensor arranged at a downstream side of an exhaust purification catalyst, is configured to judge if a state of the air-fuel ratio sensor is normal or abnormal based on the first characteristic of change of air-fuel ratio and, if a judgment cannot be made based on the first characteristic, the ECU is configured to judge if the state of the air-fuel ratio sensor is normal or abnormal based on a second characteristic of change of air-fuel ratio. As a result, it is possible to suppress the effects of the change of state of the exhaust purification catalyst while accurately diagnosing the abnormality of deterioration of response of a downstream side air-fuel ratio sensor.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: December 26, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroshi Miyamoto, Yuji Miyoshi, Yasushi Iwazaki, Toru Kidokoro, Keiichiro Aoki
  • Patent number: 9810131
    Abstract: Regarding a work vehicle configured to include an engine mounted on a travelling machine body and an exhaust gas purification device arranged in an exhaust gas path of the engine, it is an object to prevent the regeneration control of the exhaust gas purification device from being executed against an operator's will. The work vehicle of the present invention includes a regeneration switch 329 configured to cause the regeneration control of an exhaust gas purification device 50 to be executed. First, when a cumulative drive time of an engine 5 has passed in a prescribed time or longer, a regeneration control request warning is displayed on a meter panel 246. Then, only when a regeneration switch 329 is manually operated by an operator after the display of the regeneration control request warning on the meter panel 246, the regeneration control of the exhaust gas purification device 50 is started.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: November 7, 2017
    Assignee: Yanmar Co., Ltd.
    Inventors: Akimichi Iwata, Kazuhisa Yokoyama, Yuusuke Koike
  • Patent number: 9777654
    Abstract: A method for controlling a vehicle including an exhaust aftertreatment system for purifying exhaust gases from a compression-ignition engine includes monitoring vehicle operating parameters, determining whether the vehicle is stopped, determining whether the engine is commanded off, and determining whether the exhaust aftertreatment device is at a predetermined operating temperature. When the vehicle is stopped, the engine is commanded off and the exhaust aftertreatment device is at the predetermined operating temperature the engine is controlled in a run-on state for a predetermined period of time. The run-on state includes operating the engine in a throttled and fueled state.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: October 3, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Gongshin Qi, Eric D. Thomas, Charles E. Solbrig
  • Patent number: 9726094
    Abstract: Various methods and arrangements for controlling catalytic converter temperature are described. In one aspect, an engine controller includes a catalytic monitor and a firing timing determination unit. The catalytic monitor obtains data relating to a temperature of 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. Another aspect of the invention relates to an engine exhaust system that can help expedite the heating of a catalytic converter.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: August 8, 2017
    Assignee: Tula Technology, Inc.
    Inventors: Matthew A. Younkins, Ram Subramanian, Leo Breton
  • Patent number: 9660889
    Abstract: Embodiments provide a schema for representing data usage plans and data usage statistics. The data usage plan describes threshold values associated with network connections of computing devices of the user. A web service dynamically generates data usage statistics for the computing devices to represent data consumed by the computing devices under the data usage plan. The schema is updated with the data usage statistics and distributed to the computing devices for presentation to the user.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: May 23, 2017
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Gil Zalmanovitch, Gregory James Scott, Shai Guday, Alec Garvin Kwok, Yue Jiang, Kenneth Vincent Ma
  • Patent number: 9644558
    Abstract: A work apparatus has an internal combustion engine and a starter device for starting the engine. Within a housing of the work apparatus, a first electrical component is arranged at a first location and a second electrical component is arranged at a second location. A control unit is provided which is connected to the first electrical component and to the second electrical component. The control unit detects a first temperature-dependent value of the first electrical component at the first location, and a second temperature-dependent value of the second electrical component at the second location, and identifies the starting conditions as a function of these values. The first electrical component is a first actuator and the second electrical component is a second actuator or a sensor.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: May 9, 2017
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Manuel Dangelmaier, Tim Gegg, Clemens Klatt
  • Patent number: 9631570
    Abstract: An engine operation control apparatus and engine operation control method of a vehicle are provided. The engine operation control apparatus includes a coolant temperature sensor that detects a coolant temperature of a coolant line which passes through an engine. Further, the apparatus includes first and second maps in which corresponding engine operating points are mapped to a vehicle speed, a gear stage, a driver requesting torque, and an electric field load amount of the vehicle. A controller determines a candidate operating point using any one of the first and second maps based on a comparison between the coolant temperature and a predetermined threshold value and determines an optimal operating point of the engine using the candidate operating point.
    Type: Grant
    Filed: October 24, 2015
    Date of Patent: April 25, 2017
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Yong Kak Choi, Hyungseuk Ohn, Minseok Song, Dong Jun Shin
  • Patent number: 9624855
    Abstract: Embodiments for controlling an exhaust back-pressure valve are provided. In one example, a method for operating an engine comprises closing an exhaust back-pressure valve in response to a component temperature, adjusting intake and/or exhaust valve operation in response to closing the exhaust back-pressure valve to reduce cylinder internal exhaust gas recirculation (EGR), and while the exhaust back-pressure valve is closing, indicating degradation of an exhaust back-pressure system if a designated engine operating parameter remains constant. In this way, degradation of the exhaust back-pressure system may be diagnosed while maintaining combustion stability.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: April 18, 2017
    Assignee: Ford Global Technologies, LLC
    Inventors: Thomas G. Leone, Peter C. Moilanen
  • Patent number: 9587573
    Abstract: A system includes a catalyst light-off module that selectively generates a first signal based on an engine coolant temperature and an estimated exhaust enthalpy, a setpoint module that selectively initiates a catalyst light-off period in response to receiving the first signal and that generates a desired exhaust enthalpy, and a first model predictive control (MPC) module that generates predicted parameters based on a model of an engine and a set of possible target values, generates a cost for the set of possible target values based on the predicted parameters and the desired exhaust enthalpy, and selects the set of possible target values from multiple sets of possible target values based on the cost. The system also includes an engine actuator module that adjusts an actuator of the engine based on at least one of the target values.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: March 7, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Robert J. Genslak, Gary Robert Cygan, Jr.
  • Patent number: 9551261
    Abstract: An object is to suppress the occurrence of a failure in supply of urea water as much as possible in filling control of urea water in a pump share-type urea water supply system with two supply valves. In the pump share-type urea water supply system with a first supply valve and a second supply valve, a urea water tank is connected with the respective supply valves by a urea water supply path. The urea water supply path includes a first supply path for the first supply valve and a second supply path for the second supply valve. The second supply path has a larger capacity than the capacity of the first supply path by a predetermined volume.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: January 24, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Junichi Matsuo, Nobumoto Ohashi, Akira Mikami, Keishi Takada, Shigeki Nakayama
  • Patent number: 9517760
    Abstract: A hybrid vehicle according to one embodiment of the present invention has: an internal combustion engine including an in-cylinder fuel injection valve and a crank ventilation system; a motor; a power transmission mechanism connecting a drive shaft of the vehicle and the engine to allow torque transmission therebetween and connecting the drive shaft and the motor to allow torque transmission therebetween; and a control device. The control device controls output torques of the engine and the motor so as to exert an equal torque to a user requiring torque on the drive shaft. Furthermore, the control device stops the engine when an engine stop condition that included a condition that a coolant water temperature is equal to or higher than an intermittency allowance temperature, and start the engine when an engine start condition is satisfied.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: December 13, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Daigo Ando
  • Patent number: 9482129
    Abstract: In a vehicle including an engine, an electrically heatable catalyst device (EHC), and a first motor generator that generates electric power in accordance with the engine's motive power with the vehicle in a substantially stopped state with a vehicular speed lower than a threshold vehicular speed, an ECU determines, based on an amount A by which an accelerator pedal is operated and a vehicular speed V, whether a large accelerator operation has been performed with the vehicle in the substantially stopped state. If the ECU determines that the large accelerator operation has been performed with the vehicle in the substantially stopped state, the ECU activates an energization timer, and before the energization timer reaches a reference energization period of time ?, the ECU energizes the EHC, and once the energization timer has reached the reference energization period of time ?, the ECU ceases energizing the EHC.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: November 1, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Hiroshi Katsuta
  • Patent number: 9469293
    Abstract: In a vehicle capable of performing regenerative braking by a motor, when regenerative power is supplied to both of a battery and an electric heating catalyst device (EHC), and it is predicted that the battery is overcharged at the time of turning-off of EHC (a supply of power to the EHC is stopped), ECU temporarily delays turning-off of EHC. ECU determines whether or not a condition for turning off the EHC is met during the EHC turning-off delay. When the condition for turning off the EHC is met, the regenerative brake torque is lowered so that the regenerative power becomes less than the battery acceptable power, and the hydraulic brake torque is increased depending on lowering of the regenerative brake torque, and thereafter the EHC turning-off delay is cancelled.
    Type: Grant
    Filed: November 24, 2011
    Date of Patent: October 18, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hiroshi Katsuta
  • Patent number: 9422883
    Abstract: A method is provided for generating rapid light-off for a diesel oxidation catalyst (DOC) close-coupled to a compression-ignition engine. The engine includes an intake passage in fluid communication with a combustion chamber, a throttle for controlling a flow of intake air through the intake passage, and an exhaust passage configured to channel an exhaust gas from the combustion chamber to the DOC. The method includes starting the engine to commence a warm-up thereof and regulating the throttle to restrict supply of the intake airflow to the combustion chamber. The method additionally includes injecting a predetermined amount of fuel into the combustion chamber during the engine's exhaust cycle such that the injected fuel is carried by the exhaust gas and burned in the exhaust passage. Regulating the throttle and injecting fuel during the warm-up of the engine together increase temperature of the exhaust gas for rapid light-off of the close-coupled DOC.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: August 23, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Ping Ge, Ryu Hariyoshi
  • Patent number: 9388722
    Abstract: An exhaust gas treatment system for an internal combustion engine is provided. The exhaust gas treatment system includes an electrically heated catalyst (“EHC”) device in fluid communication with an exhaust gas conduit, a generator, a selective catalytic reduction (“SCR”) device, and a control module. The EHC device includes an electric heater and an EHC catalyst that is heated to an EHC light-off temperature. The generator is selectively operable in a target voltage mode to supply a target voltage to the electric heater. The target voltage represents a voltage required by the electric heater in order to maintain the EHC catalyst at a catalyst temperature. The SCR device is in fluid communication with the exhaust gas conduit. The SCR device is located downstream of the EHC device and includes an SCR catalyst that is selectively heated by the EHC device to a SCR light-off temperature.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: July 12, 2016
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Eugene V. Gonze, Michael J. Paratore, Jr., Chandra S. Namuduri
  • Patent number: 9366215
    Abstract: Disclosed are methods, systems, and computer-readable mediums for predicting a driving intention of a driver of a vehicle. A sequence comprising a plurality of indicators is detected, where each indicator suggests intent to drive a vehicle. A separation time between each of the indicators of the sequence is determined. The sequence and determined separation times are compared to historical data, where the historical data comprises data related to previously stored separation times of the sequence. Based on the comparison, a confidence level that an engine of the vehicle will be started is determined. Based on the confidence level, a feature of the vehicle is activated.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: June 14, 2016
    Assignee: Cummins, Inc.
    Inventors: Michael J. Cunningham, Govindarajan Kothandaraman, Nassim Khaled, Yu Liu, Aniket Gupta
  • Patent number: 9303577
    Abstract: Methods and systems are provided for controlling exhaust emissions by adjusting an injection profile for fuel injected into an engine cylinder from a plurality of fuel injectors during engine start and crank. By splitting injection of fuel during start so that a portion of fuel is port injected and a remaining portion is direct injected as one or multiple injections, the soot load of the engine can be reduced and fuel economy can be improved.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: April 5, 2016
    Assignee: Ford Global Technologies, LLC
    Inventors: Gopichandra Surnilla, Steven Schwochert, Peter C. Moilanen, Eric Krengel
  • Patent number: 9279354
    Abstract: A heating-controller controls an electric power supply from a battery to a urea-water heater based on a voltage of the battery detected by a voltage detector and an engine-state of an internal combustion engine obtained by an engine-state detector. When a voltage of the battery is low or when the internal combustion engine stops, the heating-controller prohibits the electric power supply from the battery to the urea-water heater. A urea-water adding device can avoid an excess decrease of a battery power by intermittently energizing the urea-water heater according to the engine-state of an internal combustion engine and the battery voltage VB.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: March 8, 2016
    Assignee: DENSO CORPORATION
    Inventors: Takanori Yoshida, Masakazu Toukairin
  • Patent number: 9238199
    Abstract: A combined flow mixing, tempering and noise suppressing apparatus for a selective catalytic reduction system, and method of use thereof is provided. The suppressing apparatus is positioned downstream of a gas input duct of the selective catalytic reduction system in order to provide improved flow uniformity and reduced noise at the entrance to the SCR system with minimal pressure loss. The combined flow mixing, tempering and noise suppressing apparatus includes lobe depressions that extend toward a centerline axis of a gas input duct of the selective catalytic reduction system and alternating lobe protrusions leading away from the centerline axis. The combined flow mixing, tempering and noise suppressing apparatus can include a means for introducing a secondary stream, such as an air manifold or an air bustle in fluid communication with the selective catalytic reduction system.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 19, 2016
    Assignee: HONEYWELL INTERNATIONAL, INC.
    Inventors: Matthew Martin, Kurt Kraus, Christopher Ferguson, Brian Duck, Richard Martin
  • Patent number: 9236623
    Abstract: An object of the present invention is to provide a fuel cell system suited for changing a drive operating point of a fuel cell at the time of low-efficiency power generation. The fuel cell system in accordance with the present invention includes a fuel cell which generates electric power by supplied reactant gases, an air compressor which adjusts the flow rate of a reactant gas supplied to the fuel cell, and a controller which controls an output current of the fuel cell by controlling the air compressor to change a drive operating point of the fuel cell. The controller sets a restriction on at least one of a current change amount and a voltage change amount per unit time when changing the drive operating point of the fuel cell in a range of low-efficiency power generation in which a power loss is larger than that in normal power generation.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: January 12, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Tomoya Ogawa
  • Patent number: 9228464
    Abstract: Embodiments for heating a catalyst are provided. In one example, a method for controlling an internal combustion engine having an exhaust-gas aftertreatment device during a cold-start phase comprises adjusting a temperature of cooling water to a setpoint operating temperature as a function of a degree of aging of the exhaust-gas aftertreatment device of the internal combustion engine, wherein the temperature of the cooling water is increased more quickly as a present degree of aging of the exhaust-gas aftertreatment device increases.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: January 5, 2016
    Assignee: Ford Global Technologies, LLC
    Inventor: Yasser Mohamed sayed Yacoub
  • Patent number: 9217381
    Abstract: A hybrid vehicle includes an engine, a motor generator configured to control the revolution speed of the engine, and an ECU configured to control ignition timing of the engine. The ECU modifies, in the case where the revolution speed of the engine is not controlled by the motor generator, the ignition timing for startup of the engine to a further timing retarding side, as compared to the case where the revolution speed of the engine is controlled by the motor generator.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: December 22, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi Matsumoto, Daigo Ando
  • Patent number: 9200552
    Abstract: In an apparatus for controlling supply power to a conductive porous carrier of a catalyst converter for cleaning an emission, a moisture determiner determines whether moisture is contained in and/or on the conductive porous carrier. A power controller controls supply power to the conductive porous carrier for energization of the conductive porous carrier such that a value of the supply power to the conductive porous carrier when it is determined that the moisture is contained in and/or on the conductive porous carrier is lower than a value of the supply power to the conductive porous carrier when it is determined that the moisture is not contained in and/or on the conductive porous carrier.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: December 1, 2015
    Assignee: DENSO CORPORATION
    Inventors: Taro Hirai, Noriaki Ikemoto, Takeshi Harada, Naoyuki Kamiya, Hisashi Iida
  • Patent number: 9163545
    Abstract: A heat exchanger (9), of e.g. an exhaust gas system (5) for an internal combustion engine (1), includes a thermoelectric generator (12) having a hot side (13) and a cold side (14) and including a heating tube (15) on a hot side of a heating device (10), and a cooling tube (16) on a cold side of a cooling device (11). The heating tube and the cooling tube are stacked on one another and form a tube stack (18), with the heating tube and the cooling tube extending parallel to one another in a longitudinal direction (19) of the tube stack. For energy efficiency, a housing (21) of the heat exchanger has a jacket (23) with an integral re-tensioning section (25) that is resiliently adjustable between a relaxed state and a tensioned state. The pre-tensioning section generates a pre-tensioning force (26) pressing the tube stack in a stacking direction (17).
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: October 20, 2015
    Assignee: Eberspächer Exhaust Technology GmbH & Co. KG
    Inventors: Andreas Resch, Sebastian Leicht, Jörg Oesterle
  • Patent number: 9062582
    Abstract: An exhaust post-treatment device (2) for a vehicle (4) for reducing nitrogen oxides present in the exhaust gases (20) of the vehicle (4) by supply of liquid reducing agent (18) to the exhaust gases (20) in an exhaust pipe (32). The device (2) locally warms a surface (31) within the exhaust pipe (32) by a Peltier element (6) by using thermal energy from the exhaust gases (20) to vaporize liquid reducing agent (18) which reaches the surface (31), thereby avoiding the formation of deposits of reducing agent within the exhaust pipe (32). Also a method for post-treatment of exhaust gases from vehicles with an exhaust post-treatment device (2) including a Peltier element (6).
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: June 23, 2015
    Assignee: SCANIA CV AB
    Inventors: Peter Loman, Ola Hall, Daniel Ryrfeldt
  • Patent number: 9065101
    Abstract: A fuel injection system and method for injecting hydrocarbon fuel into a fuel reformer for generating hydrogen rich gas from hydrocarbon fuel are provided. The hydrocarbon fuel is injected into the fuel reformer as spray having a pulsating pressure.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: June 23, 2015
    Assignee: POWERCELL SWEDEN AB
    Inventor: Peter Forsberg
  • Publication number: 20150128573
    Abstract: A diesel engine fluid reservoir system having a reservoir of diesel exhaust fluid in thermal communication with a heating element, a first conduit for the flow of engine coolant fluid to the heating element, a temperature sensor disposed to sense ambient temperature and/or a temperature of the diesel exhaust fluid, a controller communicatively coupled to the temperature sensor and communicatively coupled to a sprung gate valve included in the first conduit. The gate valve has a no-flow position and a flow position for control of the flow of engine coolant and includes an endless elastic band sandwiched between a first gate member and a second gate member each defining an opening therethrough alignable with the first conduit in the flow position. In response to a sensed temperature at which the diesel exhaust fluid is frozen, the controller signals the gate valve to be in the flow position.
    Type: Application
    Filed: November 12, 2014
    Publication date: May 14, 2015
    Applicants: TLX TECHNOLOGIES, LLC, DAYCO IP HOLDINGS, LLC
    Inventors: Dave Fletcher, Brian M. Graichen, Matt Gilmer, James H. Miller, Jeff Rogala
  • Publication number: 20150128572
    Abstract: An exhaust gas control apparatus for an internal combustion engine, controls an exhaust operation of the internal combustion engine (200) provided with an exhaust gas purification catalyst (216) in an exhaust passage (215). The exhaust gas control apparatus for the internal combustion engine is provided with a warming-up device configured to warm up the exhaust gas purification catalyst; and an oxygen supplying device (220, 221) configured to supply oxygen to the exhaust gas purification catalyst after the end of the warm-up. This makes it possible to preferably desorb sulfur adsorbed to the exhaust gas purification catalyst during warm-up. It is therefore possible to suppress a reduction in purification ability of the exhaust gas purification catalyst due to sulfur coating.
    Type: Application
    Filed: December 27, 2011
    Publication date: May 14, 2015
    Inventors: Takahiro Fujiwara, Norihisa Nakagawa, Kouichi Kimura, Shuntaro Okazaki, Keisuke Nagasaka, Ichiro Kitamura, Satoshi Kamitani, Koji Morita
  • Publication number: 20150128570
    Abstract: An exhaust gas purification apparatus includes: a reduction catalyst converter that reduces and purifies nitrogen oxides in exhaust gas; a tank that stores a liquid reducing agent or precursor thereof; and an injection nozzle that injects the liquid reducing agent or precursor thereof stored in the tank on an exhaust gas upstream side of the reduction catalyst converter. Some of the exhaust gas flowing through an exhaust pipe is diverted to the tank by a bypass pipe, to cause an exchange of heat between the diverted exhaust gas and the liquid reducing agent or precursor thereof stored in the tank, thereby thawing the liquid reducing agent or precursor thereof frozen in the tank.
    Type: Application
    Filed: January 21, 2015
    Publication date: May 14, 2015
    Inventor: Yasuyoshi TOMITA
  • Patent number: 9027325
    Abstract: An ambient NOx adsorption catalyst that can adsorb NOx contained in an exhaust gas in the presence of CO under standard conditions is placed in an engine exhaust gas passage, in an internal combustion engine. Until an engine post-initiation catalyst is activated, the amounts of a high-boiling-point hydrocarbon and an unsaturated hydrocarbon that are contained in the exhaust gas flowing into the catalyst are reduced so that the NOx-adsorbing activity cannot be deteriorated by the adhesion activity of the hydrocarbons while maintaining the CO concentration in the exhaust gas flowing into the catalyst at a level higher than the concentration required for the adsorption of NOx.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: May 12, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yusuke Nakayama, Yukihiro Sonoda, Takaaki Itou, Takaaki Kanazawa
  • Publication number: 20150113955
    Abstract: A method for reducing the pollutant emissions in the exhaust gas in a start/catalytic converter heating phase of an internal combustion engine featuring externally supplied ignition and having at least one catalytic converter in an exhaust gas tract of the internal combustion engine, and for adapting a catalytic converter heating strategy to suitable state variables of the internal combustion engine and the catalytic converter as well as to the fuel quantity, the aging state and ambient conditions. The internal combustion engine is operated in a first phase of the start/catalytic converter heating phase using a lean air-fuel mixture in a range between a lambda value of 1.05 and at a lean misfire limit of the internal combustion engine that lies at a higher lambda value, and/or in a second phase of the start/catalytic converter heating phase, initially using a rich air-fuel mixture.
    Type: Application
    Filed: October 23, 2014
    Publication date: April 30, 2015
    Inventors: Jochen HOFSTAETTER, Volker Ricken
  • Patent number: 9016044
    Abstract: A method is provided for operating an internal combustion engine of a motor vehicle. The method includes, but is not limited to storing exhaust gas while the engine is working, and supplying the stored exhaust gas into at least an engine cylinder during a subsequent start phase of the engine.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: April 28, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Giovanni Mafrici, Lorenzo Magro
  • Publication number: 20150107230
    Abstract: In an exhaust gas purification apparatus for an internal combustion engine which is provided with an NOx catalyst arranged in an exhaust passage of the internal combustion engine, the present invention has for its problem to be solved to suppress an increase in exhaust emissions, which results from processing for raising the temperature of the NOx catalyst, to a small level. In order to solve the above-mentioned problem, the exhaust gas purification apparatus for an internal combustion engine of the invention is constructed such that when an amount of increase in the NOX removal rate becomes smaller with respect to an amount of rise in the temperature of the NOx catalyst, the execution of temperature raising processing is deferred, and processing to make small the flow rate of exhaust gas discharged from the internal combustion engine and processing to make small the amount of smoke discharged from the internal combustion engine are executed.
    Type: Application
    Filed: June 1, 2012
    Publication date: April 23, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Katsuhiro Ito
  • Patent number: 9010088
    Abstract: A load application means, which applies a load to an engine such that a temperature of exhaust gas is raised to a temperature required to burn particulate matter, is comprised of an electric load application means for applying the load to the engine to raise the temperature of the exhaust gas by operating an electric assist motor to generate electric power and a hydraulic load application means for applying the load to the engine to raise the temperature of the exhaust gas by increasing a delivery pressure of a variable displacement hydraulic pump, and a selection control unit is provided for performing control processing to selectively actuate the electric load application means and/or the hydraulic load application means.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: April 21, 2015
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Kouji Ishikawa, Hidetoshi Satake, Shinji Nishikawa, Takatoshi Ooki
  • Publication number: 20150101312
    Abstract: An O2 purge control method for two type catalysts may include, performing, by a WCC O2 purge of a warm up catalytic converter (WCC), a sensor based WCC O2 purge logic to which a voltage of a WCC O2 sensor is applied immediately after a fuel-cut; and when the sensor based WCC O2 purge logic is completed, applying an O2ucc learning history and an O2uccReset of an O2ucc (oxygen quantity adsorbed into UCC) for an under floor catalytic converter (UCC) and performing, by any one of a factor based UCC O2 purge logic to which an engine RPM and an Fpurge of a purge oxygen suction quantity [mg] are applied and a sensor based UCC O2 purge logic to which a voltage value of an UCC O2 rear sensor is applied, an UCC O2 purge of the UCC.
    Type: Application
    Filed: August 19, 2014
    Publication date: April 16, 2015
    Applicant: Hyundai Motor Company
    Inventor: Muyoung CHOI
  • Patent number: 8997457
    Abstract: Embodiments for controlling an exhaust back-pressure valve are provided. In one example, a method for operating an engine comprises closing an exhaust back-pressure valve in response to a component temperature, and adjusting intake and/or exhaust valve operation in response to closing the exhaust back-pressure valve to reduce cylinder internal exhaust gas recirculation (EGR). In this way, combustion stability may be maintained while the exhaust back-pressure valve is closed.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: April 7, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Thomas G. Leone, Peter C. Moilanen
  • Patent number: 8997456
    Abstract: An electronically controlled compression ignition engine includes an electronic engine controller in control communication with fuel injectors, a high pressure exhaust recirculation system and a variable geometry turbocharger. The controller is configured to execute a low load rapid warm up algorithm that generates control signals to reduce turbine efficiency, set an air fuel ratio in a predetermined range, set the exhaust gas recirculation in a predetermine range and supply fuel in a split injection in each engine cycle that includes a main injection initiated before top dead center and a post injection initiated after top dead center. These settings allow for rapid warm up to the aftertreatment inlet in excess of 300° C.
    Type: Grant
    Filed: June 12, 2012
    Date of Patent: April 7, 2015
    Assignee: Caterpillar Inc.
    Inventors: Matthew Wolk, Gurudutt Nayak
  • Patent number: 8943800
    Abstract: When an internal combustion engine (1) is determined to be in a low-temperature start state (an affirmative determination is made in S120), an air-fuel ratio control apparatus (10) controls the temperature of a downstream detection element (17) of a downstream gas sensor (15) to a downstream target temperature by driving a downstream heater (16) of the downstream gas sensor (15) (S170), and feedback-controls the air-fuel ratio of exhaust gas based on the output of the downstream gas sensor (15) (S190). When the engine (1) is determined not to be in the low-temperature start state (a negative determination is made in S120), the air-fuel ratio control apparatus (10) drives an upstream heater (25) of an upstream gas sensor (22) and feedback-controls the air-fuel ratio of exhaust gas based on the output of the upstream gas sensor (22) (S270).
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: February 3, 2015
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Kenichiro Umemoto, Shuichi Hanai, Koji Nagura
  • Patent number: 8943814
    Abstract: A warm-up system for an exhaust system of an internal combustion engine includes an electronic control unit that performs warm-up control for warming up an exhaust system component upon start-up of the internal combustion engine and a failure diagnosis performing module of the electronic control unit that performs failure diagnosis for the exhaust system component after the completion of warm-up of the exhaust system component. If the internal combustion engine repeatedly stops before completion of the failure diagnosis for a predetermined period of time, then the electronic control unit changes the warm-up control performed upon start-up of the internal combustion engine to a control that raises the temperature of the exhaust system component more quickly than the warm-up control performed during the predetermined period.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: February 3, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Daisuke Shibata, Toru Kidokoro, Hiroshi Sawada, Kazuya Takaoka
  • Patent number: 8904767
    Abstract: The present invention relates to a method for achieving reduced emissions at cold start of an internal combustion engine having an exhaust gas after treatment system comprising at least one Diesel Oxygen Catalyst (DOC), at least one Diesel Particulate Filter (DPF) and a Selective Catalytic Reduction (SCR) unit, comprising the steps of: heating the DOC prior to cold starting said internal combustion engine, starting and controlling the internal combustion engine towards low NOx emission when said DOC has reached a predetermined temperature, optimizing the fuel consumption at a given total emission level when said DPF and SCR has reached a predetermined temperature.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: December 9, 2014
    Assignee: Volvo Lastvagnar AB
    Inventors: Lennart Andersson, Bert-Inge Bertilsson
  • Patent number: 8904755
    Abstract: A heater control device of an oxygen concentration sensor is provided in which even in a case where an internal combustion engine is automatically stopped by idle stop control after cold start-up, it is possible to start energization of a heater at an appropriate time.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: December 9, 2014
    Assignee: Bosch Corporation
    Inventors: Keiichi Takeda, Ken Noguchi
  • Patent number: 8881504
    Abstract: An exhaust gas treatment system for an internal combustion engine is provided. The exhaust gas system includes an exhaust gas conduit, a generator, a vehicle electrical system, a primary energy storage device, a rechargeable secondary energy storage device, an electrically heated catalyst (“EHC”) device, and a control module. The primary energy storage device is selectively connected to the generator. The primary energy storage device has a threshold state of charge (“SOC”). The rechargeable secondary energy storage device is selectively connected to the generator and the vehicle electrical system. The EHC device is in fluid communication with the exhaust gas conduit. The EHC device has an electric heater that is selectively connected the generator for receiving energy and a selectively activated catalyst that is heated to a respective light-off temperature.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: November 11, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Eugene V. Gonze, Michael J. Paratore, Jr., Charles E. Solbrig, Chang H. Kim
  • Patent number: 8875487
    Abstract: An exhaust purifying system includes: a catalytic device supplied with electric power from a power supply unit; a first connecting unit connecting one end of the catalytic device to a negative electrode node of the power supply unit; a second connecting unit connecting the other end of the catalytic device to a positive electrode node of the power supply unit; a leak detecting unit detecting leak from the power supply unit; and a control unit controlling opening and closing of each of the first and second connecting units. When leak is not detected by the leak detecting unit in a leak check state where one of the first and second connecting units is closed and the other is opened, the control unit closes the other and applies current through the catalytic device, and when leak is detected in the leak check state, the control unit does not apply the current through the catalytic device.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: November 4, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Hiroshi Katsuta
  • Patent number: 8863506
    Abstract: A method of sizing a light-off core supporting a fixed quantity of a light-off catalyst for an exhaust gas treatment system having an electric heater upstream of the light-off catalyst for heating the exhaust gas includes measuring the cumulative hydrocarbon or carbon monoxide emissions leaving the exhaust gas treatment system for multiple volumetric sizes of the light-off core in accordance with a heating strategy. Alternatively, a model of the treatment system may be used to predict the cumulative hydrocarbon or carbon monoxide emissions. The method further includes selecting the volumetric size of the light-off core that is associated with the lowest cumulative hydrocarbon or carbon monoxide emissions level from the measured or predicted hydrocarbon or carbon monoxide emissions when the exhaust gas is heated in accordance with the heating strategy. The heating strategy may include pre-crank heating, post-crank heating, or a combination of pre-crank heating and post crank heating.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: October 21, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Karthik Ramanathan, Se H. Oh
  • Patent number: 8857152
    Abstract: A method unloads hydrocarbon emissions deposited by an exhaust gas on an after-treatment device that is employed in an exhaust system for an internal combustion engine. The method includes determining whether the engine has been operating at a preset idle speed for a predetermined amount of time. The method also includes increasing the preset idle speed by a predetermined value if the engine has been operating at a preset idle speed for a predetermined amount of time. The increasing of the engine idle speed increases a flow rate of the exhaust gas to the after-treatment device and unloads the deposited hydrocarbon emissions. A system for unloading hydrocarbon emissions deposited on an after-treatment device and a vehicle employing such a system are also disclosed.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: October 14, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Christopher Whitt, Rebecca J. Darr, Thomas Larose, Jr., Sarah Funk
  • Patent number: 8833058
    Abstract: Embodiments for routing exhaust in an engine are provided. In one example, an engine method comprises, during a first condition, firing a subset of cylinders and routing all exhaust from the subset of cylinders through a first exhaust manifold coupled directly to a catalyst and not a turbocharger, and during a second condition, firing all cylinders, routing a first portion of exhaust through a second exhaust manifold coupled to the turbocharger, and routing a second portion of exhaust through the first exhaust manifold. In this way, exhaust can be directly routed to a catalyst under some conditions.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: September 16, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: James Douglas Ervin, Kim Hwe Ku, Gregory Patrick McConville, Brad Alan Boyer
  • Patent number: 8820049
    Abstract: A method to control valves in a cylinder operating in a multi-stroke cylinder mode. Valves are controlled to improve engine emissions as operating conditions vary.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: September 2, 2014
    Assignee: Ford Global Technologies, LLC
    Inventor: Donald J. Lewis
  • Patent number: 8776495
    Abstract: An exhaust gas after treatment system for an internal combustion engine comprises an oxidation catalyst device having a first substrate, a heater, and a second substrate disposed serially between the inlet and the outlet. A hydrocarbon supply is connected to and is in fluid communication with the exhaust system upstream of the oxidation catalyst device for delivery of a hydrocarbon thereto. The heater is configured to oxidize the hydrocarbon therein and to raise the temperature of the second substrate and exhaust gas passing therethrough.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: July 15, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Eugene V. Gonze, Michael J. Paratore, Jr.