Exhaust Gas Diverted From Reactor Or Treating Agent Mixer Patents (Class 60/288)
  • Patent number: 7802421
    Abstract: A means capable of supplying exhaust gas sufficiently imitating exhaust gas from actual diesel engines is provided. A PM generating apparatus has a constitution in which combustion air supplied to the space between a chassis and an outer casing via an air inlet is introduced into the space between the outer casing and an inner casing via through-holes of the outer casing, and a fuel injected by an fuel-injection means into the space between the chassis and the outer casing is introduced into the space between the outer casing and the inner casing via the through-holes of the outer casing, wherein the fuel is combusted to generate PM.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: September 28, 2010
    Assignee: NGK Insulators, Ltd.
    Inventors: Toshihiko Hijikata, Satoru Yamada, Yukio Miyairi
  • Patent number: 7802419
    Abstract: Exhaust gas post treatment system for nitrogen oxide reduction of internal combustion engines operated with excess air. A partial exhaust gas stream is branched off upstream of an SCR catalytic converter for reducing nitrogen oxides. A metering device delivers to the partial exhaust gas stream reduction agent, which is ammonia or a material that releases ammonia downstream of the supply location as a result of the hot exhaust gas. The partial exhaust gas stream is returned to the exhaust gas stream downstream of the supply location and upstream of the SCR catalytic converter, which reduces the 1J nitrogen oxides in the exhaust gas stream with the aid of the ammonia or released ammonia, by selective catalytic reduction, to nitrogen and water vapor.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: September 28, 2010
    Assignee: MAN Nutzfahrzeuge
    Inventor: Andreas Döring
  • Publication number: 20100205939
    Abstract: A main exhaust passage 42 and a first bypass passage 46 bypassing the main exhaust passage 42 are provided. An absorbent 52 having a function of absorbing HC components and NOx components contained in exhaust gas is provided in the first bypass passage 46. An underfloor catalyst 56 including a catalyst with an electric heater (EHC) 58 is provided in a main exhaust passage 42 on a downstream side of a downstream connecting portion 48b in a first bypass passage 46. A second bypass passage 62 that provides communication between the main exhaust passage 42 downstream of the underfloor catalyst 56 and the first bypass passage 46 upstream of the absorbent 52 is provided. A first exhaust switching valve 50 is provided in an upstream connecting portion 48a, and a second exhaust switching valve 68 is provided in a main exhaust passage side connecting portion 64a. A pump 66 is provided in the middle of the second bypass passage 62.
    Type: Application
    Filed: April 28, 2008
    Publication date: August 19, 2010
    Inventors: Keisuke Sano, Takaaki Itou, Kimikazu Yoda, Kazuhiro Wakao
  • Publication number: 20100199634
    Abstract: An exhaust treatment system for use with a power system is disclosed. The exhaust treatment system may have an SCR device (32), and an oxidation device (26) located upstream of the SCR device (32) to convert NO to NO2. The exhaust treatment system may also have an exhaust passageway (14) extending from an exhaust source (10) to the oxidation device (26), and a bypass passageway (24) extending from the exhaust passageway at a location upstream of the oxidation device to the exhaust passageway at a location downstream of the oxidation device (26). The exhaust treatment system may further have a valve element (20) configured to selectively direct exhaust from the exhaust source (10) through the oxidation device (26) and through the bypass passageway (24), at least one sensor configured to sense operating parameters of the exhaust source (10), and a controller (36) in communication with the valve element (20).
    Type: Application
    Filed: May 2, 2007
    Publication date: August 12, 2010
    Inventor: David Mark Heaton
  • Publication number: 20100186378
    Abstract: An apparatus including an exhaust passage that forks at a separating portion and joins at a joining portion, exhaust gas purification catalysts between the separating portion and the joining portion, a filter downstream of the joining portion, reducing agent supply units supplying reducing agent to the respective exhaust passages at positions upstream of the exhaust gas purification catalysts, and control units controlling quantity of the exhaust gas passing through the exhaust gas purification catalysts. When regenerating the filter, the reducing agent is supplied by one reducing agent supply unit, and the quantity of exhaust gas passing through the exhaust gas purification catalyst provided in the exhaust passage to which the reducing agent is supplied is made smaller.
    Type: Application
    Filed: June 13, 2008
    Publication date: July 29, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanori Ueda, Shinya Hirota
  • Patent number: 7763214
    Abstract: A reforming device includes a reforming part that subjects a hydrocarbon-based raw material to be reformed to a reforming reaction to form a reducing agent to be supplied to a reducing catalyst for reducing nitrogen oxide selectively. The reforming part has a reforming reaction region through which the raw material to be reformed passes and is reacted with supplied hydrogen atoms supplied so as to be reformed to the reducing agent. For example, a hydrogen permeable membrane having a first surface and a second surface may be provided in the reforming part to permeate hydrogen atoms from the first surface to the second surface and to produce the hydrogen atoms on the second surface. The reforming device can be suitably used for an exhaust gas control system for cleaning exhaust gas, for example.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: July 27, 2010
    Assignee: Denso Corporation
    Inventors: Katsunori Iwase, Tetsuo Toyama, Shigeru Ooyanagi, Yoshiaki Nishijima, Masahiro Okajima
  • Patent number: 7748213
    Abstract: An exhaust gas passageway of an internal combustion engine is basically provided with a main exhaust passageway, a bypass exhaust passageway, a bypass catalytic converter provided in the bypass exhaust passageway, a bypass control valve, an upstream air-fuel ratio sensor and a downstream air-fuel ratio sensor. The bypass exhaust passageway bypasses a portion of the main exhaust passageway between an upstream junction and a downstream junction. The bypass control valve opens or closes a portion of the main exhaust passageway. The upstream air-fuel ratio sensor is disposed upstream of the bypass catalytic converter to sense air-fuel ratio of an exhaust gas flowing into the bypass catalytic converter. The downstream air-fuel ratio sensor is disposed downstream of the bypass catalytic converter to sense air-fuel ratio of the exhaust gas flowing out of the bypass catalytic converter.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: July 6, 2010
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Suki I, Kenichi Sato, Kimiyoshi Nishizawa
  • Patent number: 7743606
    Abstract: A catalyst system that may regenerate while removing pollutants from an exhaust gas of an engine. The system may have a converter with multiple segments of chambers. At least one of the chambers may be regenerated while the remaining chambers are removing pollutants from the exhaust. The chambers may be rotated in turn for one-at-a-time regeneration. More than one chamber may be regenerated at a time to remove collected pollutants. The system may have plumbing and valves, and possibly mechanical movement of the chambers, within the system to effect the changing of a chamber for regeneration. The chambers connected to the exhaust may be in series or parallel. A particulate matter filter may be connected to the system, and it also may be regenerated to remove collected matter.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: June 29, 2010
    Assignee: Honeywell International Inc.
    Inventors: Vladimir Havlena, Joseph Z. Lu, Syed M. Shahed, Michael L. Rhodes, Tariq Samad
  • Patent number: 7743604
    Abstract: A system for providing heat to the dump body of a dump truck is disclosed. The disclosed system is suitable for use with truck equipped with a diesel particulate filter. When enabled, the system controls the exit path of exhaust gas such that it is routed to the dump body during normal operating conditions. In one embodiment, when the diesel particulate filter enters a regeneration cycle, high heat is produced. The system then routes the exhaust gas as to bypass the dump body to avoid heat damage from the higher temperature exhaust gas.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: June 29, 2010
    Inventor: Daniel Albanesi
  • Patent number: 7735314
    Abstract: A diesel engine exhaust treatment system has both a NOx reduction device and a diesel particulate filter. The system is designed to ensure that the NOx reduction device operates within its optimal temperature conditions. Using exhaust flow control valves, the exhaust flow can be directed into either the NOx reduction device first or into the diesel particulate filter first, and then into the other device, before exiting out the tailpipe.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: June 15, 2010
    Assignee: Southwest Research Institute
    Inventors: Qilong Lu, Yiqun Huang
  • Publication number: 20100139246
    Abstract: The invention relates to a system and a control method for an exhaust aftertreatment system (10) of an engine (12) in which one or more constituents of the exhaust gas are oxidized in an oxidation catalyst (20) and one or more constituents of the exhaust gas are deoxidized in a selective-catalytic-reduction catalyst (70), wherein the exhaust gas flows from the oxidation catalyst (20) to the selective-catalytic-reduction catalyst (70). It is.
    Type: Application
    Filed: February 21, 2008
    Publication date: June 10, 2010
    Applicant: VOLVO LASTVAGNAR AB
    Inventors: Lennart Andersson, Lennart Cider
  • Publication number: 20100132340
    Abstract: An object of the present invention is to provide an exhaust gas purifying apparatus for an internal combustion engine which can properly purge at least NOx of unpurified components contained in exhaust gas while considering characteristics of NOx desorbed from an adsorbent. A bypass passage 18 bypassing a main exhaust passage 12 of the internal combustion engine 10 is provided. A HC/NOx adsorbent 22 having a function of adsorbing HC and NOx is provided in the bypass passage 18. A second underfloor catalyst 30 is provided downstream of the adsorbent 22. A purge passage 26 branching off from the bypass passage 18 while connecting to an intake passage is provided. An exhaust switching valve 20 and a purge control valve 28 are provided as a flow path switching means that is capable of switching a flow target into which the exhaust gas flows between the main exhaust passage 12 and the bypass passage 18. If the purging operations are executed, the intake purging operation is first executed.
    Type: Application
    Filed: March 10, 2008
    Publication date: June 3, 2010
    Inventors: Keisuke Sano, Takaaki Itou, Mimikazu Yoda, Kazuhiro Wakao
  • Patent number: 7726119
    Abstract: A plurality of upstream main exhaust passages extend from cylinders of an engine. A downstream main exhaust passage is connected to the upstream main exhaust passages. A main catalytic converter is mounted in the downstream main exhaust passage. A plurality of upstream bypass exhaust passages extend from the upstream main exhaust passages. Each upstream bypass exhaust passage has a sectional area smaller than that of the corresponding upstream main exhaust passage. A downstream bypass exhaust passage is connected to the upstream bypass exhaust passages and has a downstream end connected to the downstream main exhaust passage at a position upstream of the main catalytic converter. An auxiliary catalytic converter is mounted in the downstream bypass exhaust passage. A gas flow switching device is provided which is capable of forcing the exhaust gas from the cylinders of the engine to flow toward the upstream bypass exhaust passages when assuming a given operation position.
    Type: Grant
    Filed: June 7, 2005
    Date of Patent: June 1, 2010
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Sungi I, Takao Inoue, Kimiyoshi Nishizawa, Shunichi Mitsuishi
  • Patent number: 7721529
    Abstract: An exhaust system for a combustion source is disclosed. The exhaust system may have a passageway connected to receive an exhaust flow from the combustion source, and a sensor disposed within the passageway. The sensor may generate a signal indicative of the concentration of a constituent in the exhaust flow. The exhaust system may also have a controller in communication with the sensor to receive the signal. The controller may be configured to selectively communicate a flow of calibration gas with the sensor during operation of the combustion source, and compare the signal received during the selective communication with a reference value. The controller may be further configured to adjust the sensor output in response to the comparison.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: May 25, 2010
    Assignee: Caterpillar Inc.
    Inventors: Mary Louise Kesse, Paul Adam Gamble, James Joshua Driscoll, Michael Paul Withrow
  • Patent number: 7712307
    Abstract: In an exhaust gas system for an internal combustion engine, particularly of a motor vehicle, wherein the exhaust gas system comprises a nitrogen oxide reducing converter arranged in an exhaust gas line of the internal combustion engine, an exhaust gas cleaning device arranged upstream of the nitrogen oxide reducing converter and a reducing agent feed device for feeding a reducing agent into the exhaust gas of the internal combustion engine upstream of the nitrogen oxide reducing converter, a bypass line is provided which branches off from the exhaust gas line upstream of the exhaust gas cleaning device and rejoins the exhaust gas line at an entry point downstream of the exhaust gas cleaning device and upstream of the nitrogen oxide reducing converter.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: May 11, 2010
    Assignee: Daimler AG
    Inventors: Tillman Braun, Detlef Scharr
  • Publication number: 20100107611
    Abstract: A method and system for managing an exhaust gas feedstream from an internal combustion engine operative lean of stoichiometry includes steps and apparatus for diverting exhaust around a three-way catalytic converter during NOx adsorber regeneration thereby increasing reductants available in the NOx adsorber to react with the adsorbed NOx.
    Type: Application
    Filed: November 6, 2008
    Publication date: May 6, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: David J. Cleary, Wei Li
  • Publication number: 20100077736
    Abstract: In a treatment for regenerating the purification capability of an exhaust emission control system, a technique for improving exhaust emission more positively is provided by supplying a reducing agent to the exhaust emission control system and allowing part of exhaust to bypass the exhaust emission control system. When an addition synchronous bypass control is carried out in which an reducing agent is added when an NSR is subject to NOx reduction treatment and the volume of exhaust passing through a bypass pipe out of exhaust passing an exhaust pipe is increased to thereby decrease the volume of exhaust passing through the NSR, a judgment is made (S106) as to which is larger a reduction in volume of Nox exhausted (S105) due to an increase in conversion efficiency of the NSR as the result of the addition synchronous bypass control carried out or an increase in volume of Nox exhausted (S103) due to an increase in exhaust passing through the bypass pipe.
    Type: Application
    Filed: January 21, 2008
    Publication date: April 1, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akinori Morishima, Mikio Inoue
  • Patent number: 7673447
    Abstract: The present invention relates to an exhaust system for an internal combustion engine, in particular in a motor vehicle, with an exhaust line in which an oxidation catalyst is provided for treatment of the exhaust gases coming from the internal combustion engine. To be able to heat the oxidation catalyst more rapidly in a cold start of the internal combustion engine, a pre-oxidation unit may be provided in the exhaust line upstream from the oxidation catalyst and connected to a secondary fuel supply and adapted so that it partially oxidizes the secondary fuel supplied in combination with an oxidizer in a catalyst heating operation and the partially oxidized intermediate products are supplied to the oxidation catalyst for complete oxidation.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: March 9, 2010
    Assignee: J. Eberspaecher GmbH & Co. KG
    Inventor: Gerd Gaiser
  • Patent number: 7673446
    Abstract: An exhaust emission control system for an internal combustion engine is disclosed. The exhaust emission control system has a first passageway and a second passageway disposed to receive exhaust in parallel. The exhaust emission control system also has a valve arrangement configured to regulate the flow of exhaust to the first and second passageways, and at least one sensor configured to sense a parameter indicative of a constituent of the exhaust. The at least one sensor generates a signal corresponding to the sensed parameter. The exhaust emission control system also has a controller in communication with the valve and the at least one sensor. The controller is configured to affect operation of the valve in response to the signal.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: March 9, 2010
    Assignee: Caterpillar Inc.
    Inventors: Svetlana Mikhailovna Zemskova, Julie Marie Faas, Christie Susan Ragle, Matthew Owen Stefanick, Ronald Graham Silver
  • Patent number: 7662197
    Abstract: In a method for operating an exhaust-gas cleaning unit of a diesel engine including a particle filter and a nitrogen oxide storage device arranged upstream of the particle filter, wherein sulfur regeneration of the nitrogen oxide storage device is performed periodically at raised exhaust gas temperatures and, in certain phases, with a rich exhaust gas composition, and also soot regeneration of the particle filter is performed at raised exhaust gas temperatures with a lean exhaust gas composition, at least some of the sulfur regeneration and the soot regeneration phases are performed in a combined soot and sulfur regeneration phase, and for the sulfur regeneration, at least temporarily, a rich exhaust-gas composition with a temperature higher than the temperature of the lean exhaust gas composition is provided for the soot regeneration of the particle filter.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: February 16, 2010
    Assignee: Daimler AG
    Inventors: Frank Duvinags, Stefan Kurze, Thomas Liebscher, Arno Nolte, Markus Paule, Norbert Ruzicka, Joachim Schommers
  • Publication number: 20100024396
    Abstract: Method and systems are provided for operating an engine having a hydrocarbon retaining system coupled to an engine exhaust and an engine intake. One example method comprises, during an engine cold start, routing exhaust gas to the hydrocarbon retaining system to store hydrocarbons in the hydrocarbon retaining system. The method further comprises, during a first purging condition where the exhaust gas is at a first temperature, purging the hydrocarbon retaining system with at least exhaust gas, and during a second purging condition where the exhaust gas is at a second temperature, said second temperature being higher than said first temperature, mixing the exhaust gas with an amount of fresh air to form a purging gas mixture, and purging the hydrocarbon retaining system with said purging gas mixture.
    Type: Application
    Filed: July 30, 2008
    Publication date: February 4, 2010
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Jason Aaron Lupescu, Shane Elwart, James Michael Kerns, Michael James Uhrich, Harendra S. Gandhi
  • Patent number: 7647766
    Abstract: Various systems and methods are disclosed for carrying out combustion in a fuel-cut operation in some or all of the engine cylinders of a vehicle. Further, various subsystems are considered, such as fuel vapor purging, air-fuel ratio control, engine torque control, catalyst design, and exhaust system design.
    Type: Grant
    Filed: October 15, 2007
    Date of Patent: January 19, 2010
    Assignee: Ford Global Technologies, LLC
    Inventors: Gopichandra Surnilla, Christian T. Goralski, Jr., Stephen B. Smith
  • Patent number: 7640728
    Abstract: In an exhaust gas purification apparatus for an internal combustion engine (1) equipped with independent exhaust passages (2a, 2b) provided one for each cylinder group (1a, 1b) with a catalyst (3a, 3b) having a NOx trapping ability being arranged in each exhaust passage, the present invention is intended to provide a technique that can independently control the flow rates of exhaust gases flowing into the respective catalysts.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: January 5, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kouji Yoshizaki, Makoto Ogiso
  • Patent number: 7640731
    Abstract: A reconfigurable exhaust system provides selective positioning of exhaust gas treatment devices either near, or spaced from, the exhaust gas outlet port of a turbine of a turbocharged Diesel engine. In some embodiments, auxiliary air or a heat exchanger are arranged to cool the exhaust gas when required.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: January 5, 2010
    Assignee: Southwest Research Institute
    Inventor: Yiqun Huang
  • Patent number: 7634905
    Abstract: A method for operating an internal combustion engine and a device for implementing the method, in which a diagnosis is performed of an adjusting device situated in the exhaust duct of the internal combustion engine, which distributes the exhaust gas between a first and at least one second exhaust gas path. A transit time from a change of a characteristic quantity of the exhaust gas in front of the adjusting device until the appearance behind the adjusting device detected by a sensor is compared to a specified transit time threshold value. The transit time threshold value is specified as a function of a setpoint position of the adjusting device. In the event of a deviation from or exceedance of the threshold value, a fault signal is provided.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: December 22, 2009
    Assignee: Robert Bosch GmbH
    Inventors: Axel Heinstein, Klaus Ries-Mueller
  • Publication number: 20090301065
    Abstract: An exhaust system for an internal combustion engine includes an upstream segment and a downstream segment connecting with the upstream segment. The downstream segment is a NOx reducing segment having an exhaust gas outlet and a reductant inlet disposed between the exhaust gas outlet and an exhaust gas inlet for the downstream segment. The upstream segment further includes a coating having a catalyst configured to increase a ratio of NO2 to NO in exhaust gases passing through the upstream segment. The coating includes a catalyst distribution, which may be a catalyst coating length, which is linked to a target ratio of NO2 to NO for reducing NOx in the downstream segment. The catalyst distribution in the upstream segment is adapted to increase the ratio of NO2 to NO, while limiting the ratio of NO2 to NO to a ratio optimized for reduction of NOx in the downstream segment.
    Type: Application
    Filed: June 6, 2008
    Publication date: December 10, 2009
    Inventor: Zhiyong Wei
  • Patent number: 7614218
    Abstract: A particulate filter 8 is disposed in an exhaust passage 7 of an internal combustion engine 1, and a reduction catalyst 9 is disposed downstream of the particulate filter 8. A bypass passage 12 for bypassing the reduction catalyst 9 and a flow path switching valve 13 which switches a flow path for the exhaust gas which has passed through the particulate filter 8 between the exhaust passage 7 and the bypass passage 12 are disposed. A control unit 301 controls the flow path switching valve 13 in association with a temperature Texh of the exhaust gas which has passed through the particulate filter 8.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: November 10, 2009
    Assignee: Nissan Diesel Motor Co., Ltd.
    Inventor: Hisashi Akagawa
  • Patent number: 7607291
    Abstract: An engine system includes first and second combustion chamber groups that supply exhaust to respective first and second exhaust passages. NOx in the exhaust of the first combustion group is converted to ammonia, such as by enriching the exhaust with fuel and then passing the mixture over an appropriate catalyst. Particles are trapped and continuously oxidized through appropriate placement of one or more particle traps coated with an appropriate oxidizing catalyst. NOx in the second passage from the second combustion group is combined with ammonia produced in the first passage and converted to nitrogen and water in a merged passage before being vented to atmosphere. This conversion is accomplished by passing the merged exhaust over an appropriate selective catalytic reduction catalyst.
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: October 27, 2009
    Assignee: Caterpillar Inc.
    Inventors: Josh Driscoll, Wade J. Robel
  • Patent number: 7600372
    Abstract: A bypass passage is provided, which connects a portion upstream of a turbine of a supercharger in an exhaust passage to a portion close to a front end surface of exhaust gas purification in the exhaust passage, and through which at least part of exhaust gas discharged from an internal combustion engine flows. The exhaust gas discharged from the bypass passage is blown to the front end surface of the exhaust gas purification means in a lateral direction of the front end surface, whereby particulate matter deposited in the front end surface of the exhaust gas purification means is blown off.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: October 13, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Ryoji Nishiumi
  • Patent number: 7594391
    Abstract: An exhaust system for an internal-combustion engine comprises an exhaust bypass in parallel with an upstream portion of a main exhaust path having a main catalytic converter in a downstream portion thereof; an exhaust bypass catalytic converter provided in the exhaust bypass; and a flow path switching valve for blocking the main exhaust path at the upstream portion thereof. The exhaust system includes an ignition timing adjustment mechanism for adjusting ignition timing to delay sparking when the flow path switching valve is switched from the closed condition to the open condition thereof. A control method for the exhaust system is also disclosed.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: September 29, 2009
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Sunki I, Takao Inoue, Kouichi Mori
  • Patent number: 7584605
    Abstract: An exhaust-gas purification system and method are provided for an internal combustion engine having an NOx storage catalytic converter and a downstream SCR catalytic converter. The NOx storage catalytic converter can be supplied in a first operating mode with an oxidizing exhaust gas and in a second operating mode with a reducing exhaust gas. A third operating mode is provided between the first operating mode and the second operating mode, in which an exhaust gas which has a lower content of oxidizing constituents than the first operating mode and a lower content of reducing constituents than the second operating mode can be supplied to the NOx storage catalytic converter to improve NH3 production at the start of converter regeneration.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: September 8, 2009
    Assignee: Daimler AG
    Inventors: Thomas Beckmann, Alexander Massner
  • Publication number: 20090183498
    Abstract: An exhaust emission control device includes an adsorbent trapper having an adsorbent for adsorbing and desorbing hydrocarbon in exhaust gas, a catalytic converter, a main exhaust gas passage with a first valve, a bypass exhaust gas passage with a second valve and a control unit. The bypass exhaust gas passage bypassing the first valve is connected with the adsorbent. The control unit controls the first and second valves to desorb the hydrocarbon from the adsorbent when a condition is satisfied. The condition is that the catalyst converter is in active, an oxygen adsorption amount of the catalyst converter is not less than a first predetermined amount and an exhaust gas amount is not more than a second predetermined amount. The first valve is opened and the second valve is closed when the condition is not satisfied during desorption of the hydrocarbon from the adsorbent.
    Type: Application
    Filed: January 21, 2009
    Publication date: July 23, 2009
    Inventors: Kazuya Uchida, Kimiyoshi Nishizawa, Ken Oouchi, Kunikazu Ban
  • Patent number: 7559196
    Abstract: An exhaust system of the internal combustion engine comprises upstream main paths for cylinders that are attached to a side of a cylinder head and extend towards a side of the engine, and are connected to the respective cylinders; a downstream main path in which the upstream main paths join so as to become one flow path; a main catalytic converter provided on the downstream main path; bypasses that are split from the upstream main paths or the downstream main path; a bypass catalytic converter that is provided on the bypass; and flow path switching valves that open and close the upstream main paths so that exhaust discharged from the cylinders flows into the bypass. The bypass catalytic converter is provided below the upstream main paths.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: July 14, 2009
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takao Inoue, Sunki I, Motoharu Akaba, Kimiyoshi Nishizawa
  • Publication number: 20090126352
    Abstract: A system comprising an engine having a first and second bank of cylinders, said first bank having a first and second group of cylinders, said second bank having a third and fourth group of cylinders; a first emission control device coupled to said first and second group for treating gasses from said first and second group separately; a second emission control device coupled to said third and fourth group for treating gasses from said third and fourth group separately; and a controller for operating said first and third group about stoichiometry and said second and fourth group to pump air without injected fuel.
    Type: Application
    Filed: December 17, 2008
    Publication date: May 21, 2009
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Gopichandra Surnilla, Christian T. Goralski, JR., Stephen B. Smith, James P. O'Neill, Garry Zawacki
  • Publication number: 20090120076
    Abstract: An exhaust system for treating an exhaust gas composition having NO2 in a first NO2 concentration. The exhaust system includes a first catalyst that contacts a first portion of the exhaust gas composition converting it into a first oxidized exhaust mixture that includes NO2 in a second NO2 concentration that is greater than the first NO2 concentration. The system further includes a bypass that receives a second portion of the exhaust gas composition and a recombination section positioned downstream of the first catalyst. The first oxidized exhaust mixture is combined with the second portion of the exhaust gas composition to produce a first combined exhaust gas mixture. A second catalyst converts the first combined exhaust gas mixture to a second combined exhaust gas mixture having a third NO2 concentration that is less than the second NO2 concentration. The method used by the exhaust system is also provided.
    Type: Application
    Filed: November 14, 2007
    Publication date: May 14, 2009
    Applicant: UMICORE AUTOCAT USA INC.
    Inventors: Owen Herman Bailey, Robert Reginald Loucks, Christopher Simon Owens
  • Patent number: 7530222
    Abstract: A hydraulic assembly and method for use with an vehicle engine exhaust flow control valve for controlling flow to at least one intake supply. The assembly has an actuator, such as a spring return piston cylinder, for positioning the control valve. An inlet passage, communicating with the cylinder, is arranged for supplying hydraulic fluid to a side of the actuator and a drain is arranged for draining the hydraulic fluid from the side of the actuator. An on-off type hydraulic valve, communicating with the drain, is operably coupled to the cylinder for controlling communication of the hydraulic fluid from the cylinder side to the drain. When the hydraulic assembly is in use, the pressure of hydraulic fluid acting on the actuator is adjustable by operation of the on-off type valve thereby to control movement of the actuator and, in turn, movement of the control valve.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: May 12, 2009
    Assignee: Honeywell International, Inc.
    Inventors: David G. Parker, Alfred J. Babineau, Michael J. Burkett
  • Patent number: 7509800
    Abstract: An exhaust system of an internal combustion engine having at least one cylinder comprises a main exhaust passage connected to the cylinder; a main catalytic converter disposed in the main exhaust passage; a bypass exhaust passage that diverges from the main exhaust passage, the bypass exhaust passage having a gas flow resistance larger than that of the main exhaust passage and having a downstream end connected to the main exhaust passage at a position upstream of the main catalytic converter; an auxiliary catalytic converter disposed in the bypass exhaust passage; and a gas flow switching device that is capable of forcing exhaust gas from the cylinder of the engine to flow toward the bypass exhaust passage when assuming a given operation position.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: March 31, 2009
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Sungi I, Takao Inoue, Kimiyoshi Nishizawa
  • Patent number: 7509799
    Abstract: To provide an engine exhaust gas treatment system that can efficiently reduce and remove NOx using easy-to-handle urea as the reducing agent, regardless of the engine operating conditions. An exhaust gas denitration system in which an exhaust gas is introduced into the denitration catalyst reactor 5 provided in the exhaust gas flue 3, where NOx is reduced and removed in the presence of the denitrati on catalyst, wherein a diversion means provided in the exhaust gas flue 3 introduces part or all of the exhaust gas into a urea solution injection evaporator having a heating means by the heater 30, and the heat from the exhaust gas and the heat from the heater serve to generate ammonia that is then circled and mixed with the exhaust gas and introduced into the denitration catalyst reactor 4.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: March 31, 2009
    Assignees: Hitachi High-Technologies Corporation, Babcock-Hitachi K.K.
    Inventors: Kiyoshi Amou, Makoto Yamakado, Hiroshi Kusumoto, Masami Nagano, Ikuhisa Hamada, Toshifumi Mukai, Hiroshi Yokota
  • Patent number: 7503170
    Abstract: The invention concerns a structure (11) comprising a filtering member (21) comprising intake conduits (35) for the gases to be filtered, and conduits (37) for extracting the filtered gases, separated from the intake conduits (35) by porous filtering walls (43). The intake conduits (35) emerge into openings (49) for discharging respective residues, provided downstream of the respective intake openings (47). The openings discharging residues (49) of the intake conduits (35) open into a common manifold (25) for receiving solid filtering residues, forming counter-pressure means for the intake conduits (35). Said manifold (25) is isolated from the extracting conduits (37). The invention is applicable to particulate filters for exhaust gases of a motor vehicle diesel engine.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: March 17, 2009
    Assignee: Saint-Gobain Centre de Recherches et d'Etudes Europeen
    Inventors: Dominique Dubots, Nicolas Bonnail
  • Patent number: 7503168
    Abstract: An apparatus, system, and method are disclosed for particulate filter regeneration. The apparatus includes a bypass exhaust channel configured to conduct exhaust gasses away from a main exhaust channel and reintroduce the exhaust gasses into the main exhaust channel upstream from a particulate filter, a burner, and a regeneration module configured to monitor exhaust gas variables and divert a portion of the exhaust gasses through the bypass exhaust channel in response to the exhaust gas variables. The system includes a vehicle having an internal combustion engine coupled to a transmission, and the apparatus. The method includes conducting exhaust gasses away from a main exhaust channel and reintroducing the exhaust gasses into the main exhaust channel, raising the temperature of the exhaust gasses, and monitoring exhaust gas variables and selectively diverting a portion of the exhaust gasses through a bypass exhaust channel in response to the exhaust gas variables.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: March 17, 2009
    Assignee: Cumming Filtration IP, Inc
    Inventors: James C. Clerc, Bruce A. Watson
  • Publication number: 20090056317
    Abstract: The invention relates to an exhaust gas line for exhaust gas from at least one cylinder of an internal combustion engine, having at least one collecting housing (1) with a connection to an exhaust gas recirculation system (2). The collecting housing (1) is designed as a section of the exhaust gas line for the internal combustion engine.
    Type: Application
    Filed: July 18, 2008
    Publication date: March 5, 2009
    Inventor: Hans Sudmanns
  • Publication number: 20080295499
    Abstract: An exhaust treatment system is provided having a first exhaust passageway fluidly connected to an engine. A particulate filter and a selective catalytic reduction catalyst are situated within the first exhaust passageway. In addition, the system has a first oxidation catalyst located within the first exhaust passageway upstream of the particulate filter and the selective catalytic reduction catalyst. The system also has a second exhaust passageway fluidly connected to the first exhaust passageway upstream and downstream of the first oxidation catalyst. The exhaust treatment system further has a sensor configured to sense a parameter indicative of an exhaust gas temperature. Furthermore, the system has a controller configured to direct exhaust gas through the first oxidation catalyst when the exhaust gas temperature is below a threshold temperature and direct the exhaust gas through the second exhaust passageway when the exhaust gas temperature is above the threshold temperature.
    Type: Application
    Filed: May 31, 2007
    Publication date: December 4, 2008
    Inventors: James Joshua Driscoll, Cho Ying Liang, Ronald Silver, Corey Marie Shannon, Zhiyong Wei
  • Patent number: 7458207
    Abstract: The aftertreatment apparatus and method of the invention concentrate diesel exhaust under low engine load conditions in a motor vehicle, such as idling, before filtering the diesel exhaust. The apparatus has a housing which is in fluid communication with a filter and other components of the diesel exhaust system. The apparatus has an exhaust concentrator to concentrate the low load diesel exhaust. The concentrated exhaust is directed a limited part of the filter and/or the catalytic device, such as the center. The exhaust concentrator is at least partially disposed within the housing.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: December 2, 2008
    Assignee: International Truck Intellectual Property Company, LLC
    Inventor: Mark S. Ehlers
  • Publication number: 20080271439
    Abstract: The invention relates to an exhaust line (10) for a heat engine, comprising a nitrogen oxide trap (28) which is installed on a filter section (24) between an exhaust inlet (12) and an exhaust outlet (14). The invention also comprises: a bypass section (26) which is disposed between the nitrogen oxide trap (28) and the exhaust inlet (12) in order to divert the exhaust gas away from the nitrogen oxide trap (28), and exhaust gas switching means (32, 24) which enable the gases to flow through the filter section (24) or the bypass section (26).
    Type: Application
    Filed: May 29, 2006
    Publication date: November 6, 2008
    Applicant: FAURECIA SYSTEMES D'ECHAPPEMENT
    Inventor: Stephane Londos
  • Patent number: 7444803
    Abstract: An exhaust gas control apparatus for an engine and a method for producing the same are provided. The exhaust gas control apparatus includes a valve portion, an absorption portion, and a catalyst portion. The valve portion includes a valve that opens/closes a main exhaust passage. The absorption portion includes a hydrocarbon-absorbent that absorbs hydrocarbons. The catalyst portion includes a three-way catalyst that purifies exhaust gas. The valve portion, absorption portion, and the catalyst portion are independent of each other. The valve portion, the absorption portion, and the catalyst portion are connected to each other in series. With this configuration, any individual component can be replaced with another corresponding component that achieves a required level of performance while minimizing the number of other components.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: November 4, 2008
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yasunori Iwamoto, Masaharu Kuroda, Yasuhiro Nobata, Toshio Murata
  • Patent number: 7430857
    Abstract: A cost-effective solution to remove particulates from diesel, especially light-duty diesel engines incorporates an oxidation catalyst (2) effective to convert NO in the exhaust from the engine to NO2 and a particulate trap (4) which traps no more than 85% by weight of the particulate, optionally by permitting gas to by-pass the trap.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: October 7, 2008
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Guy Richard Chandler, Martyn Vincent Twigg
  • Patent number: 7421839
    Abstract: Attained is a heat generative exhaust emission control device with less electric power consumption and with no harmful gas discharged to atmosphere. A porous filter body 7 for capturing particulates in exhaust gas 2 through passing of the exhaust gas 2 is provided with an electric heater 9 so as to heat the filter body 7; thus, a heat regenerative particulate filter 10 is provided. The heat regenerative particulate filters 10 are accommodated in filter casings 11 and 12 within an exhaust pipe 3, and oxidation catalysts 13 and 14 are arranged upstream and downstream of and adjacent to the heat regenerative particulate filter 10 so as to obtain thermo-keeping or heat insulation effect to the heat regenerative particulate filter 10.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: September 9, 2008
    Assignee: Hino Motors, Ltd.
    Inventor: Tatsuki Igarashi
  • Publication number: 20080209889
    Abstract: An internal combustion engine with exhaust gas aftertreatment and method for the operation thereof are provided. The internal combustion engine includes at least one first and one second group of one or more combustion chambers, in which the one or more combustion chambers of the first group may be supplied with fuel independently of the one or more combustion chambers of the second group, an exhaust system having a first exhaust branch line which leads away from the first combustion chamber group, and a second exhaust branch line which leads away from the second combustion chamber group, and at least one exhaust gas aftertreatment unit which, at the inlet side, is connected to the first and second exhaust branch lines. Also, a bypass line, which leads away from the second exhaust branch line, for bypassing the exhaust gas aftertreatment unit is provided.
    Type: Application
    Filed: July 1, 2005
    Publication date: September 4, 2008
    Applicant: Daimlerchrysler AG
    Inventor: Helmut Scheinert
  • Publication number: 20080184699
    Abstract: An exhaust gas cleaning apparatus is provided that has a main exhaust passage, a main catalytic converter disposed in the main exhaust passage, a bypass exhaust passage, a bypass catalytic converter disposed in the bypass exhaust passage, a selector valve and a controller. The controller controls the internal combustion engine to a rich combustion state with a rich air fuel ratio while the controller controls the selector valve to block the flow of the exhaust gas through the main exhaust passage, and then, afterwards, controls the selector valve to direct the flow of the exhaust gas through the main exhaust passage such that residual air remaining in the main exhaust passage mixes with rich exhaust gas from the bypass exhaust passage.
    Type: Application
    Filed: February 6, 2008
    Publication date: August 7, 2008
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Motoharu AKABA, Suki I, Takao INOUE, Kimiyoshi NISHIZAWA
  • Publication number: 20080178579
    Abstract: An exhaust emission control system for an internal combustion engine is disclosed. The exhaust emission control system has a first passageway and a second passageway disposed to receive exhaust in parallel. The exhaust emission control system also has a valve arrangement configured to regulate the flow of exhaust to the first and second passageways, and at least one sensor configured to sense a parameter indicative of a constituent of the exhaust. The at least one sensor generates a signal corresponding to the sensed parameter. The exhaust emission control system also has a controller in communication with the valve and the at least one sensor. The controller is configured to affect operation of the valve in response to the signal.
    Type: Application
    Filed: January 29, 2007
    Publication date: July 31, 2008
    Inventors: Svetlana Mikhailovna Zemskova, Julie Marie Faas, Christie Susan Ragle, Matthew Owen Stefanick, Ronald Graham Silver