Patents Examined by Audrey Klasterka
  • Patent number: 8056326
    Abstract: A regeneration device for use in an exhaust treatment system is disclosed. The regeneration device has a first housing with a plurality of passages configured to receive coolant and injection fluid. A second housing is secured to the first housing and configured to receive coolant and injection fluid. The second housing has at least one cooling recess annularly disposed within the second housing to receive and circulate coolant in proximity to a tip end of the second housing.
    Type: Grant
    Filed: August 27, 2007
    Date of Patent: November 15, 2011
    Assignee: Caterpillar Inc.
    Inventors: Glenn B. Cox, Thomas R. McClure, Robert L. Miller, Stephen M. Wiley
  • Patent number: 8056324
    Abstract: An regeneration system for use in a power system is disclosed. The regeneration system may include a source of intake air, an engine brake configured to reduce the speed of an engine by compression and release of the intake air, and a valve configured to divert a portion of the intake air to an auxiliary device. The regeneration system may further include a controller in communication with the engine brake and the valve. The controller may be configured to move the valve to reduce the portion of intake air diverted to the auxiliary device when the engine brake is active.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: November 15, 2011
    Assignee: Caterpillar Inc.
    Inventors: Stephen M. Wiley, Robert L. Miller
  • Patent number: 8033097
    Abstract: An exhaust control device for an internal combustion engine, comprises: a NOx purifying catalyst disposed in an exhaust system; and a rich control means for calculating a fuel injection amount based on a difference between a target exhaust air fuel ratio and an actual exhaust air fuel ratio to feedback-control the actual exhaust air fuel ratio so that a reducing atmosphere is created in the exhaust system to thereby reduce NOx trapped by the NOx purifying catalyst, wherein the rich control means includes a learning means for calculating and updating a control correction value of the fuel injection amount based on an actual control value of the fuel injection amount during the feedback control, and wherein the fuel injection amount is calculated during the feedback control by using the control correction value.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: October 11, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Katsuji Wada, Norio Suzuki, Tomoko Morita
  • Patent number: 8033105
    Abstract: An internal combustion engine includes an exhaust-gas system with n>1 exhaust-gas flow configurations, wherein n is an integer. The exhaust-gas flow configurations are at least partly separated from one another and each of the exhaust-gas flow configurations includes at least one catalytic converter. The internal combustion engine includes a secondary air supply system with at least one secondary air pump and at least one secondary air valve. The at least one secondary air pump is connected, via the at least one secondary air valve, to at most n?1 of the exhaust-gas flow configurations upstream of the at least one catalytic converter of the at most n?1 of the exhaust-gas flow configurations. The remaining ones of the exhaust-gas flow configurations are separated from the secondary air supply system.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: October 11, 2011
    Assignee: Volkswagen Aktiengesellschaft
    Inventors: Klaus Uphoff, Kai Bohnstedt, Mathias Dehmke
  • Patent number: 8033103
    Abstract: An exhaust purification device has a NOx catalyst that occludes NOx contained in exhaust gas at a lean air fuel ratio and that purifies (reduces) and discharges the occluded NOx at a rich air fuel ratio. The device performs full purge for discharging substantially an entirety of the occluded NOx at once based on establishment of an execution condition of the full purge to recover exhaust purification performance of the NOx catalyst. The device has a program for performing partial purge for discharging only part of the occluded NOx before the execution of the full purge. The device consecutively and repeatedly performs the partial purge except for the period in which the full purge is performed.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: October 11, 2011
    Assignee: Denso Corporation
    Inventors: Jyun Kawamura, Masakuni Yokoyama
  • Patent number: 8024919
    Abstract: A method of operating an internal combustion engine system includes passing exhaust gases from an engine to an aftertreatment device such as a particulate filter at an exhaust temperature less than a target temperature, and increasing a temperature of exhaust gases passing through the aftertreatment device to the target temperature by controllably restricting exhaust flow upstream the filter. The method still further includes generating a signal indicative of exhaust back pressure and reducing exhaust pressure by selectively reducing airflow to the engine responsive to the signal. An internal combustion engine system and associated control system includes an electronic control unit configured to selectively increase a temperature of exhaust gases passing through a particulate filter to a regeneration temperature via a variable flow restriction device.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: September 27, 2011
    Assignee: Caterpillar Inc.
    Inventors: Eric Fluga, Donald W. Heston, Richard Kruiswyk, Daniel W. Crosby, Brian Hoff
  • Patent number: 8020369
    Abstract: In a method and device for mixture control for an internal combustion engine having at least one catalytic converter disposed in an exhaust system of the internal combustion engine and a ?-closed-loop control, a value being ascertained for the loading of the catalytic converter with oxygen and the mixture being changed as a function of the ascertained value, a first mixture change is made in the direction of rich exhaust gas when the ascertained value of the oxygen loading has increased by more than a first predefined measure within a predetermined time span and/or after throughput of a predetermined quantity of exhaust-gas mass; and/or a second mixture change is made in the direction of lean exhaust gas when the ascertained value of the oxygen loading has dropped by more than a second predefined measure within a predetermined time span and/or after throughput of a predetermined quantity of exhaust-gas mass.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: September 20, 2011
    Assignee: Volkswagen AG
    Inventor: Hermann Hahn
  • Patent number: 8015804
    Abstract: An ECU executes (300) a program including a step (S202) of opening an electromagnetic ASV (232) while a vacuum pressure ASV (1) and a vacuum pressure ASV (2) are controlled so as to be closed, and an air pump (200) is controlled so as to be stopped in a case where an air amount GA that is an amount of air introduced into an engine (100) is equal to or larger than a predetermined air amount GA (0), and a coolant temperature TW at the starting time of the engine is equal to or higher than a predetermined coolant temperature TW (0) (“YES” in step S200); a step (S204) of detecting a pressure; a step (S206) of closing the electromagnetic ASV; and a step (S402) of determining that failure has occurred in at least one of the vacuum pressure ASV (1) and the vacuum pressure ASV (2), that is, one of the vacuum pressure ASV (1) and the vacuum pressure ASV (2) remains in an opened state and cannot be closed when there is a pulsation of the pressure that is detected while the electromagnetic ASV is opened (“YES” in step S
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: September 13, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tomokazu Muraguchi
  • Patent number: 8011181
    Abstract: The invention makes use of an exhaust gas catalyst, comprising an active component comprising at least one type of metal from noble metals and transition metals; NOx-absorbing material for absorbing and releasing nitrogen oxides according to the surrounding nitrogen oxide concentration; and compounds represented by A2O2SO4 and/or A2O2S (A is a rare earth element).
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: September 6, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Hirohito Hirata
  • Patent number: 8001774
    Abstract: At regeneration control while a vehicle mounting an internal combustion engine (10) is parked, both an exhaust throttle valve (13) and an exhaust brake valve (18) are used and if a catalyst temperature index temperature (Tg2) is lower than a predetermined first determining temperature (Tc1), first exhaust gas temperature rise control is conducted that the exhaust brake valve (18) is set to a fully closed side and multiple injection is carried out in in-cylinder fuel injection control, while if a catalyst temperature index temperature (Tg2) is equal to the predetermined first determining temperature (Tc1) or above, second exhaust gas temperature rise control is conducted that the exhaust brake valve (18) is set to an open side, the exhaust throttle valve (13) is set to the fully closed side, and post injection is carried out in the in-cylinder fuel injection control.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: August 23, 2011
    Assignee: Isuzu Motors Limited
    Inventors: Takao Onodera, Takashi Haseyama, Yoshinobu Watanabe, Takuro Iwashita, Kenji Hagio, Tatsuo Mashiko
  • Patent number: 8001768
    Abstract: The disclosure sets forth operating a spark-ignition, direct-fuel injection internal combustion engine equipped with an exhaust aftertreatment system including a lean-NOx reduction catalyst upstream of a second converter element. The engine preferentially operates in one of a homogeneous charge combustion mode and a stratified charge combustion mode based upon temperature of the lean-NOx reduction catalyst. Exhaust gas flow is selectively diverted to the second converter element.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: August 23, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: David J. Cleary, Calvin K. Koch, Wei Li
  • Patent number: 8001765
    Abstract: A system operable to control an exhaust gas emission of an engine, includes a catalytic converter; a fuel cutter, a change executor, a correlation value provider, an adjuster, and a controller. The change executor is operable to execute changing of an air-fuel ratio of the engine to a rich air-fuel ratio after the fuel supply is once stopped by the fuel cutter and then resumed. The correlation value provider is operable to provide a correlation value correlated to a change amount of the air-fuel ratio caused by the change executor based on a driving condition of the engine. The adjuster is operable to adjust the correlation value based on a parameter indicative of a capability of the catalytic converter. The controller is operable to cause the change executor to execute the changing based on the adjusted correlation value.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: August 23, 2011
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Koji Kawakita, Katsunori Ueda, Toshiyuki Miyata
  • Patent number: 7997066
    Abstract: The diagnosis of the heating of a catalytic converter situated in an exhaust system of an internal combustion engine is described. The system includes monitoring the actual ignition angle intervention. A current ignition angle is acquired over a specified time and converted into a torque model used for catalytic converter heating. Using the torque model, a degree of fulfillment of executed catalytic converter heating measures is obtained and an error signal is generated by comparing the obtained degree of fulfillment to a limiting value.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: August 16, 2011
    Assignee: Bayerische Motoren Werke Aktiengesellshaft
    Inventors: Gerd Kraemer, Stefan Uhl, Wolf Kiefer, Gerhard Schulz
  • Patent number: 7987667
    Abstract: A system for removing particulates from the exhaust gas of a vehicle internal combustion engine, particularly during those times that the emission of such particulates into the atmosphere would be of greatest danger to persons in the vicinity of the vehicle, includes a valve connected to the vehicle exhaust manifold for normally directing exhaust to the atmosphere, when in the non-activated condition. The valve directs exhaust to a particulate filter, when in the activated condition. Starting of the engine activates the valve for a predetermined period of time. The valve optionally is GPS-controlled and can be disabled manually or automatically by a switch, which detects the backpressure in the exhaust system. An exhaust pressure sensor monitors the exhaust backpressure, and a circuit device responsive to the exhaust pressure maintains the valve continuously in the non-activated condition, when the exhaust backpressure reaches a predetermined level for a predetermined period of time.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: August 2, 2011
    Assignee: Meier Diesel Filters, Inc.
    Inventors: John Meier, Cris Pasto
  • Patent number: 7987665
    Abstract: An apparatus for evacuating exhaust from an exhaust pipe of a vehicle having an external turbine and an internal turbine connected to the external turbine such that when the external turbine rotates the internal turbine rotates.
    Type: Grant
    Filed: September 8, 2008
    Date of Patent: August 2, 2011
    Inventor: Jafar Salamat
  • Patent number: 7980066
    Abstract: A method to operate an electronically controlled internal combustion engine that recognizes when thermal management mode of operation is being applied to an engine but is not attaining desired exhaust temperature for aftertreatment. When the Engine Control System (ECS) recognizes that the engine in operating in thermal management mode in a futile effort, the ECS aborts thermal management mode and returns to normal operating mode.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: July 19, 2011
    Assignee: Detroit Diesel Corporation
    Inventors: Matthew Thomas Baird, Amr Mohamed Radwan, Kevin Dean Sisken, Bryant Chan Pham
  • Patent number: 7980064
    Abstract: A lean NOx trap is a diesel exhaust aftertreatment system is selectively denitrated based on a measure relating to the state and/or the performance of the exhaust aftertreatment system, or a portion thereof comprising the lean NOx trap, reaching a critical value. The critical value is varied according to the demands currently being place on the exhaust aftertreatment system. In one embodiment, the critical value is set based on engine speed-load information. The method regenerates more frequently when exhaust aftertreatment demands are high and less frequently when demands are low. The method improves aftertreatment performance while reducing aftertreatment fuel penalty.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: July 19, 2011
    Assignee: Eaton Corporation
    Inventors: Dmitry Arie Shamis, James Edward McCarthy, Jr., Johannes Walter Reuter, Karen Evelyn Bevan, Christian Thomas Chimner
  • Patent number: 7980062
    Abstract: A method for cold start white smoke protection of a hydrocarbon after treatment device, and method of engine operation to effect the same. The method comprises a) determining the temperature of the hydrocarbon after-treatment device during cold start conditions; b) determining hydrocarbon emissions in the hydrocarbon after-treatment device; and c) modifying engine operating conditions to raise the hydrocarbon after-treatment temperature at a pre-determined rate to a temperature sufficient to permit controlled oxidation of the hydrocarbons in the hydrocarbon after treatment device.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: July 19, 2011
    Assignee: Detroit Diesel Corporation
    Inventors: Jason Thomas Barton, Matthew Thomas Baird
  • Patent number: 7980067
    Abstract: A method to detect drive cycles of a vehicle and modify engine operation according to the detected drive cycles to effect regeneration of exhaust components, particularly the Diesel Particulate Filter.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: July 19, 2011
    Assignee: Detroit Diesel Corporation
    Inventors: Jason Thomas Barton, James Erik Plastow, Justin Adam Shetney, Matthew Thomas Baird, Mark Allen Zurawski, Bryant Chan Pham
  • Patent number: 7980065
    Abstract: A method for regenerating a diesel particulate filter includes elevating a temperature of a gas stream flowing into an inlet of the diesel particulate filter to greater than or equal to 450° of the inlet of the diesel particulate filter, wherein the gas stream at the inlet of the diesel particulate filter contains an amount of NOx of equal to or greater than 300 ppm, and an amount of O2 of equal to or greater than 5% volume, thereby burning the soot within the diesel particulate filter. The method also includes elevating a temperature of the gas stream flowing into the inlet of the diesel particulate filter to less than or equal to 550° C. at the inlet of the diesel particulate filter, wherein a burn rate of soot from porous watts of the diesel particulate filter is greater than or equal to 3.8 grams/liter/hour.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: July 19, 2011
    Assignee: Corning Incorporated
    Inventors: Achim Karl-Erich Heibel, Joshua Adam Jamison, Paul Michael Schelling