With Exhaust Gas Recirculation Patents (Class 60/605.2)
  • Publication number: 20140298805
    Abstract: The present invention relates to a control unit of an internal combustion engine capable of performing a coordinate control of an exhaust gas recirculation (hereinafter abbreviated as “EGR”) gas supply amount by an EGR apparatus and a supercharging amount by a supercharger provided with a variable flow mechanism. The control unit comprises: a state quantity estimation section for calculating an in-cylinder oxygen excess ratio based on an operating state of the internal combustion engine; and a switching part for switching the respective opening degree commands for the EGR valve and the variable flow mechanism of the supercharger so that the opening degree of the EGR valve and the opening degree of the variable flow mechanism become smaller than in a normal state when the internal combustion engine is determined to be in the transient state based on the calculated in-cylinder oxygen excess ratio.
    Type: Application
    Filed: September 27, 2012
    Publication date: October 9, 2014
    Inventor: Ko Takayanagi
  • Patent number: 8844285
    Abstract: A two-stage supercharging exhaust turbocharger includes: a high-pressure-stage supercharger having a high-pressure turbine driven by exhaust gas discharged from an exhaust manifold of an engine; a low-pressure-stage supercharger having a low-pressure turbine driven by the exhaust gas used to drive the high-pressure-stage supercharger, the high-pressure-stage supercharger and the low-pressure-stage supercharger being arranged in series in an exhaust gas passageway; and an exhaust gas control valve configured to selectively change flow rates of the exhaust gas passageways of the high-pressure-stage supercharger and the low-pressure-stage supercharger, wherein an exhaust manifold incorporating casing is configured by integrally forming the exhaust manifold, a high-pressure turbine housing of the high-pressure-stage supercharger, and a valve casing accommodating the exhaust gas control valve.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: September 30, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventor: Byeongil An
  • Patent number: 8844286
    Abstract: An air cleaner includes a case in which an inner cylindrical filter and an outer cylindrical filter are housed, the case having a case body that defines an opening end surface closed by a cover member. The case includes an air inlet provided to an outer circumference of the case body for supplying outside air and an exhaust outlet provided to a bottom of the case body at a downstream side in an air-flowing direction for discharging the air supplied through the air inlet and filtered through the inner cylindrical filter and the outer cylindrical filter. A mass flow rate sensor is provided in the exhaust outlet to measure the flow rate of the air. A flow straightening grid is provided at the upstream side of the mass flow rate sensor to straighten the flow of the air.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: September 30, 2014
    Assignee: Komatsu Ltd.
    Inventors: Kanji Namimatsu, Tomohiro Shimazu, Tadashi Iijima
  • Patent number: 8844284
    Abstract: The invention relates to an internal combustion engine system (1), particularly in a motor vehicle, comprising an internal combustion engine (2), a fresh gas system (3) for supplying fresh gas to the internal combustion engine (2), an exhaust gas system (4) for discharging exhaust gas from the internal combustion engine (2), and an exhaust gas recirculation system (5) for removing exhaust gas from the exhaust gas system (4) at a removal point (11) and introducing the removed exhaust gas into the fresh gas system (3) at an introduction point (12). In order to improve exhaust gas recirculation, the exhaust gas system (4) is equipped with an exhaust gas valve (14) downstream of the removal point (11) in order to control the penetrable cross-section of the exhaust gas system (4).
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: September 30, 2014
    Assignee: Mahle International GmbH
    Inventors: Alfred Elsässer, Patric Genieser, Achim Gommel, Mike Lau, Boris Lerch, Adam Loch, Kristijan Mudroh
  • Patent number: 8844282
    Abstract: An exhaust-gas turbocharger has a turbine housing and a waste-gate valve of a ball-cock configuration which is arranged therein. The actuating crank of the waste-gate valve has a crank arm, to which the closing element is fastened, and a crank spindle which is connected integrally to the crank arm and is mounted in the turbine-housing wall. A stop shoulder for sealing the crank-spindle bearing and a flexural-stress relief pocket are provided in the transition region between the crank spindle and the crank arm, as a result of which the sealing action of the crank-spindle bearing and a more uniform distribution of flexural stresses in the transition region between the crank arm and the crank spindle are brought about and therefore an increased service life of the actuating crank is ensured with a simultaneously economical configuration.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: September 30, 2014
    Assignee: Continental Automotive GmbH
    Inventors: Alexander Jaegle, Roland Herfurth
  • Patent number: 8844505
    Abstract: The invention relates to a method for managing an exhaust gas recirculation circuit of a petrol thermal engine, the engine including at least one combustion chamber connected to an inlet line and an exhaust line between which extends said recirculation circuit, the recirculation circuit including a flow-rate adjustment valve, wherein said method comprises the step of adjusting flow-rate adjustment valve based on a flow-rate setpoint, said method further comprising the steps of: detecting an operation parameter representative of a pressure difference between an upstream pressure and a downstream pressure relative to the flow-rate adjustment valve, and, after comparing the parameter with a threshold corresponding to a minimum pressure difference, adjusting the flow-rate in at least one of the lines in order to increase the pressure difference.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: September 30, 2014
    Assignee: Valeo Systemes de Controle Moteur
    Inventors: Nicolas Vitiello, Sebastien Potteau, Frederic Cousin, Loic Violette, Damien Fournigault
  • Publication number: 20140283514
    Abstract: An object of the invention is to satisfy various constraints associated with supercharging pressure control even during transitional operation in a turbocharged diesel engine of which a supercharging pressure is actively controllable through operation of an actuator. The control device calculates a steady target value that is a target value of the supercharging pressure during steady operation on the basis of an engine rotation speed and a fuel injection amount, and operates the actuator through feedback control such that an actual supercharging pressure calculated from a signal of a supercharging pressure sensor is brought close to the steady target value. However, when any condition of a plurality of different conditions, which can be satisfied during transitional operation, is satisfied, a transitional target value of the supercharging pressure, suitable for the satisfied condition is calculated in accordance with a calculation rule prepared for each condition.
    Type: Application
    Filed: November 4, 2011
    Publication date: September 25, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Taku Ibuki
  • Publication number: 20140260243
    Abstract: An exhaust system, comprising a LP-EGR system that couples an exhaust system to an intake system and an exhaust pipe within the exhaust system with a turn greater 90 degrees and less than 270 degrees between front and rear tires and upstream of a LP-EGR exhaust inlet; and a muffler positioned in the exhaust system downstream of the LP-EGR exhaust inlet and forward of the front tires. By shortening the LP-EGR path, back pressure to sustain EGR flow can be maintained without the use of a back pressure valve.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventor: Xiaogang Zhang
  • Patent number: 8833075
    Abstract: A method for adjusting an exhaust heat recovery valve is presented. In one embodiment, the method may control an amount of boost provided by a turbocharger to an engine.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: September 16, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Ross Dykstra Pursifull, Joseph Norman Ulrey
  • Patent number: 8813490
    Abstract: An exhaust emission control device for an internal combustion engine is provided that can suppress the adherence of HC to an EGR path and the like accompanying enrichment of the exhaust air/fuel ratio.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: August 26, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventor: Katsuji Wada
  • Publication number: 20140230434
    Abstract: Various methods and systems are provided for cooling exhaust system components. In one example, a method comprises directing compressed air onto an exterior of an engine exhaust passage valve.
    Type: Application
    Filed: February 15, 2013
    Publication date: August 21, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Chirag Bipinchandra Parikh, Jayesh Jain, Eric David Peters
  • Publication number: 20140223903
    Abstract: An engine assembly includes an intake assembly, an internal combustion engine defining a plurality of cylinders and configured to combust a fuel and produce exhaust gas, and an exhaust assembly in fluid communication with a first subset of the plurality of cylinders. Each of the plurality of cylinders are provided in fluid communication with the intake assembly. The exhaust assembly is provided in fluid communication with a first subset of the plurality of cylinders, and a dedicated exhaust gas recirculation system in fluid communication with both a second subset of the plurality of cylinders and with the intake assembly. The dedicated exhaust gas recirculation system is configured to route all of the exhaust gas from the second subset of the plurality of cylinders to the intake assembly. Finally, the engine assembly includes a turbocharger having a variable geometry turbine in fluid communication with the exhaust assembly.
    Type: Application
    Filed: April 24, 2013
    Publication date: August 14, 2014
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventor: Edward J. Keating
  • Publication number: 20140216030
    Abstract: An exhaust system for treating exhaust gas from an internal combustion engine is disclosed. The system comprises a three-way catalyst (TWC), a fuel reformer catalyst located downstream of the TWC, and a fuel supply means located upstream of the fuel reformer catalyst. The exhaust gas is split into two portions. The first portion of the exhaust gas bypasses the TWC and contacts the fuel reformer catalyst in the presence of fuel added from the fuel supply means, and is then recycled back to the engine intake. The second portion of the exhaust gas is contacted with the TWC and is then utilized to heat the fuel reformer catalyst before being expelled to atmosphere. The exhaust system allows for maximum heat exchange from the exhaust gas.
    Type: Application
    Filed: February 4, 2014
    Publication date: August 7, 2014
    Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANY
    Inventors: KIRSTY ELLEN COCKLE, PAUL JAMES MILLINGTON, EDWARD JAMES RICHARD MOSS, JOHN FREDERICK PIGNON
  • Patent number: 8794219
    Abstract: An EGR control apparatus for an internal combustion engine, which is capable of properly controlling an inert gas amount of two types of EGR gas supplied to cylinders of the engine via two paths different from each other, thereby making it possible to ensure a stable combustion state, reduced exhaust emissions, and improve operability. The EGR control apparatus includes low-pressure and high-pressure EGR devices, and an ECU. The ECU controls the low-pressure and high-pressure EGR gas amounts according to engine speed and demanded torque, and when a combination of engine speed and demanded torque is in a predetermined region, the low-pressure and high-pressure EGR gas amounts are controlled such that inert gas in low-pressure EGR gas exceeds in amount inert gas in high-pressure EGR gas, and the former more exceeds the latter as engine speed is higher or demanded torque is larger.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: August 5, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuji Yasui, Eiji Hashimoto, Hisao Haga, Koichi Nakajima
  • Patent number: 8793997
    Abstract: In an internal combustion engine and a method of operation the internal combustion engine which includes a high pressure and a low pressure turbocharger having exhaust gas turbines arranged in series in an engine exhaust line provided with a high pressure exhaust gas recirculation line and a low pressure exhaust gas recirculation line via which exhaust gas can be conducted to an inlet line of the engine, the arrangement is switchable depending on the engine speed between an exhaust gas recirculation by way of the high pressure line and an exhaust gas recirculation by way of both, the high pressure and the low pressure line, to achieve low emissions and low fuel consumption.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: August 5, 2014
    Assignee: Daimler, AG
    Inventors: Heiko Beil, Florian Wegenast
  • Patent number: 8793996
    Abstract: An internal combustion engine has a turbocharger system and an exhaust gas recirculation (EGR) path. The turbocharger system comprises an inlet, an outlet and at least one turbocharger. The exhaust gas recirculation path recirculates a flow of exhaust gas to the air intake path. An EGR turbocharger has a turbine with an inlet in fluid communication with a first location in the exhaust gas path and an outlet in fluid communication with a second location in the exhaust gas path. The first and second locations being disposed such that, in use, the pressure difference of the gas between the inlet and outlet of the EGR turbine is less than the pressure difference of the gas between the inlet and outlet of the turbocharger system. The expansion ratio across the EGR turbine is therefore less than that across the turbocharger system and the EGR turbocharger is able to operate with greater efficiency.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: August 5, 2014
    Assignee: Cummins Turbo Technologies Limited
    Inventor: Pierre Bernard French
  • Publication number: 20140208744
    Abstract: A mixing device of an EGR apparatus has a double pipe structure being composed of a first cylindrical member and a second cylindrical member, wherein the first and second cylindrical members are coaxially arranged with each other. Cyclone blades are provided between the first and second cylindrical members, so that EGR gas introduced from an inlet portion into an inside of the first cylindrical member flows along an cylindrical inner wall of the first cylindrical member. A swirl flow is generated in the EGR gas passing through the cyclone blades, so that the EGR gas spirally flows in a downstream side to remove foreign material, such as flocculated water from the EGR gas.
    Type: Application
    Filed: April 3, 2014
    Publication date: July 31, 2014
    Applicant: DENSO CORPORATION
    Inventor: Kiyoshi OOSHIMA
  • Publication number: 20140208743
    Abstract: In response to activation of a compression release brake when a motor vehicle having a turbocharged internal combustion engine is operating at some elevation above sea level and a turbocharger compressor is operating in a region of an operating map which is creating boost air in an engine intake manifold which would cause the compression release brake to decelerate the vehicle more slowly at that elevation than it would at sea level for the same operating conditions of the vehicle and engine other than altitude, the compression release brake decelerates the vehicle less slowly by causing an exhaust gas recirculation system to reduce at least one of a) mass of exhaust diverted to an intake system of the engine and b) cooling of the diverted exhaust.
    Type: Application
    Filed: August 25, 2011
    Publication date: July 31, 2014
    Applicant: International Engine Intellectual Property Company
    Inventors: Luis Carlos Cattani, John Zagone, Bashar Y. Melhem, Paul Gottemoller, Michael D. Bartkowicz
  • Patent number: 8789370
    Abstract: A device for utilizing the waste heat of an internal combustion includes a single-stage or multi-stage supercharging device, which is designed as an exhaust-gas turbocharger in particular. The single-stage or multi-stage supercharging device is assigned an additional supercharging device including an expansion machine acted upon by an auxiliary circuit, in particular a steam circuit.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: July 29, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Juergen Stegmaier, Martin Cichon, Manfred Schmitt, Bernd Banzhaf, Achim Schmidt
  • Publication number: 20140202150
    Abstract: The reciprocating piston of an exhaust pressure wave charger for a combustion engine has an integrated hydraulic piston and an air piston transferring exhaust gas energy into mechanical power and provides exhaust gas for the combustion chamber. The fluid communication between hydraulic piston and hydraulic circuit is controlled by valves to extract the exhaust energy during the expansion stroke and advance the charger piston back into top end position. The hydraulic piston has two faces for adapting the hydraulic piston force more closely to the exhaust gas forces. Exhaust gas recirculation (EGR) is provided by an air piston and valves controlling the flow of exhaust gas into the combustion chamber.
    Type: Application
    Filed: January 24, 2013
    Publication date: July 24, 2014
    Inventor: Ingo Valentin
  • Patent number: 8783029
    Abstract: A supercharged internal combustion engine is provided. The engine comprises a cylinder, an intake line in an intake system, for supplying charge air to the cylinder, an exhaust line for discharging exhaust gases, an exhaust-gas turbocharger including a turbine arranged in the exhaust line and a compressor arranged in the intake line, an exhaust-gas recirculation arrangement including a recirculation line which branches off from the exhaust line downstream of the turbine and opens into the intake line upstream of the compressor, and a sensor for detecting the concentration Ci,intake of a component i of the charge air in the intake system provided downstream of the opening of the recirculation line into the intake line. In this way, the exhaust-gas recirculation may be regulated based on feedback from the sensor to control emissions.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: July 22, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Christian Winge Vigild, Andreas Kuske, Daniel Roettger, Juergen Karl Stief
  • Patent number: 8783028
    Abstract: An engine system includes an exhaust gas recirculation conduit having an inlet in fluid communication with an exhaust conduit and an outlet in fluid communication with an intake air conduit. An exhaust gas recirculation performance balancing restrictor has an uninstalled position wherein the exhaust conduit defines a first backpressure at the inlet of the exhaust gas recirculation conduit. The exhaust gas recirculation performance balancing restrictor also has an installed position in which the exhaust gas recirculation performance balancing restrictor is removably disposed within the exhaust conduit downstream from the inlet of the exhaust gas recirculation conduit. In the installed position, the exhaust gas recirculation performance balancing restrictor provides a fixed flow restriction through the exhaust conduit to generate a second backpressure at the inlet of the exhaust gas recirculation conduit that is greater than the first backpressure.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: July 22, 2014
    Assignee: Caterpillar Inc.
    Inventors: Eric J. Charles, Matthew F. Fahrenkrug, David E. Gorisek
  • Patent number: 8783030
    Abstract: A system and method are provided for controlling an air handling system for an internal combustion engine including a turbocharger having a variable geometry turbine and a compressor having a fresh air inlet fluidly coupled to ambient and to an air outlet of an electric air pump. An air pump enable value as determined a function of target engine speed and total fuel target values and an air flow target is determined as a function of a target fresh air flow value. Operation of the electric air pump is activated to supply supplemental air flow to the fresh air inlet of the compressor if the air pump enable value is greater than a threshold air pump enable value and the air flow target does not exceed a maximum flow value.
    Type: Grant
    Filed: September 25, 2011
    Date of Patent: July 22, 2014
    Assignee: Cummins Inc.
    Inventors: John N Chi, John M Mulloy, Sriram S Popuri, Timothy R Frazier, Martin T Books, Divakar Rajamohan, Indranil Brahma
  • Patent number: 8783031
    Abstract: Systems and methods for supplying air to an engine are disclosed. In one example, an air inlet throttle is at least partially closed in response to a change in engine torque request. In another example, the air inlet throttle is adjusted in conjunction with adjusting an engine throttle. The approach can reduce compressor noise and may reduce the possibility of compressor surge.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: July 22, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Joseph Norman Ulrey, Jeffrey Allen Doering, Ross Dykstra Pursifull, Donald J. Lewis
  • Publication number: 20140196454
    Abstract: Methods and systems are provided for controlling and coordinating control of a post-catalyst exhaust throttle and an EGR valve to expedite catalyst heating. By closing both valves during an engine cold start, an elevated exhaust backpressure and increased heat rejection at an EGR cooler can be synergistically used to warm each of an engine and an exhaust catalyst. The valves may also be controlled to vary an amount of exhaust flowing through an exhaust venturi so as to meet engine vacuum needs while providing a desired amount of engine EGR.
    Type: Application
    Filed: January 16, 2013
    Publication date: July 17, 2014
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Joseph Norman Ulrey, William Charles Ruona, Thomas G. Leone, Gopichandra Surnilla
  • Patent number: 8776517
    Abstract: The disclosure provides a system including a Rankine power cycle cooling subsystem providing emissions-critical charge cooling of an input charge flow. The system includes a boiler fluidly coupled to the input charge flow, an energy conversion device fluidly coupled to the boiler, a condenser fluidly coupled to the energy conversion device, a pump fluidly coupled to the condenser and the boiler, an adjuster that adjusts at least one parameter of the Rankine power cycle subsystem to change a temperature of the input charge exiting the boiler, and a sensor adapted to sense a temperature characteristic of the vaporized input charge. The system includes a controller that can determine a target temperature of the input charge sufficient to meet or exceed predetermined target emissions and cause the adjuster to adjust at least one parameter of the Rankine power cycle to achieve the predetermined target emissions.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: July 15, 2014
    Assignee: Cummins Intellectual Properties, Inc.
    Inventors: Timothy C. Ernst, Christopher R. Nelson
  • Publication number: 20140190163
    Abstract: The present invention is relative to a control method of a turbo-compound engine apparatus wherein said apparatus comprises a low pressure compressor connected to the high pressure turbine and a low pressure turbine connected to a high pressure compressor by means of a coupling unit. The apparatus also comprises first bypassing means of said high pressure compressor. The method according to the invention comprises the step of deactivating said first bypassing means when at least a specific condition occurs.
    Type: Application
    Filed: May 30, 2012
    Publication date: July 10, 2014
    Applicant: FPT Motorenforschung AG
    Inventor: Christian Maier
  • Patent number: 8769927
    Abstract: A method and system for controlling recirculated exhaust gas composition and quantity provided to an internal combustion engine, which has one or more separately controllable combustion cylinders, a main exhaust line and an exhaust gas recirculation (EGR) loop. A first exhaust valve is connected to the main exhaust line, and a second exhaust valve is connected to the EGR loop. The operation of the exhaust valves is controlled such that exhaust does not flow through both exhaust valves at the same time. Control of the exhaust valves is coordinated with the main fueling event used to control the exhaust composition exiting each valve for every cylinder on every cycle. During each engine cycle, a post-combustion fuel injection event is also used to add fuel to the exhaust in-cylinder, which flows only through the second (EGR) exhaust valve.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: July 8, 2014
    Assignee: Southwest Research Institute
    Inventors: Terrence F. Alger, II, Jess W. Gingrich
  • Patent number: 8769950
    Abstract: A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: July 8, 2014
    Assignee: Honeywell International Inc.
    Inventors: Jeffrey A. Lotterman, Vaclav Kares
  • Patent number: 8763394
    Abstract: A method includes detecting a presence of a fouling layer in an exhaust gas recirculation cooler of an internal combustion engine. The flow of a coolant through the exhaust gas recirculation cooler is stopped for a predetermined period of time while the engine exhaust gas flows through the exhaust gas recirculation cooler. The flow of an engine exhaust gas exiting from the exhaust gas recirculation cooler is diverted to at least one of a turbine of a turbocharger, and an exhaust pipe of the internal combustion engine. The fouling layer from the exhaust gas recirculation cooler is expelled along with the engine exhaust gas exiting the exhaust gas recirculation cooler.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: July 1, 2014
    Assignee: General Electric Company
    Inventor: Sebastian Walter Freund
  • Publication number: 20140174078
    Abstract: A fluid valve is disclosed for use in an exhaust system of an engine. The fluid valve may have a body and an inlet formed within the body. The inlet may have a curved first end surface with a raised convex first opening. Opposite the inlet, the fluid valve may also have an outlet formed within the body. The outlet may have a second end surface with a second opening. The fluid valve may also have a restriction formed between the first end surface and the second end surface, which connects the first and second openings.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 26, 2014
    Applicant: CATERPILLAR INC.
    Inventors: Deep Bandyopadhyay, Michael Goetzke
  • Publication number: 20140165557
    Abstract: One embodiment is a method including determining whether an ammonia storage device has a stored quantity of ammonia, predicting an impending ammonia release from the ammonia storage device, determining a NOx increase amount in response to the impending ammonia release, and increasing an amount of NOx provided by an engine based on the NOx increase amount. In certain embodiments, determining the NOx increase amount in response to the impending ammonia release comprises determining a NOx increase schedule based on the stored quantity of ammonia. In certain embodiments, the NOx increase schedule comprises a specified NOx increase time period, and in certain further embodiments, the method further includes decrementing the specified NOx increase time period based on an estimated catalyst degradation value.
    Type: Application
    Filed: February 19, 2014
    Publication date: June 19, 2014
    Applicant: Cummins Inc.
    Inventors: Hasan Mohammed, Joseph M. Brault
  • Publication number: 20140165560
    Abstract: An internal combustion engine system includes an internal combustion engine generating an exhaust gas stream and an air intake system coupled to the internal combustion engine. The engine system also includes a turbocharger that includes a turbine in exhaust gas receiving communication with the exhaust gas stream and a compressor in air receiving communication with the air intake line. Further, the engine system includes an exhaust system in exhaust gas receiving communication with the internal combustion engine. The exhaust system has a main exhaust line and a low pressure (LP) exhaust gas recirculation (EGR) line through which at least a portion of the exhaust gas in the main exhaust line downstream of the turbine is flowable into the air intake system. The exhaust system further includes an ammonia oxidation catalyst positioned within the LP EGR line.
    Type: Application
    Filed: December 18, 2012
    Publication date: June 19, 2014
    Applicant: CUMMINS IP, INC.
    Inventors: Cary A. Henry, Michael J. Ruth
  • Patent number: 8752532
    Abstract: This invention relates to an internal combustion engine and a control device for the internal combustion engine and has an object to provide an internal combustion engine and a control device therefore that can suppress occurrence of knocking if an EGR rate is increased. An EGR gas can be made to flow separately through one path via one EGR passage and an other path via another EGR passage. The EGR gas flow through the other path can be cooled by an intercooler. Since the intercooler usually has a capacity larger than that of an EGR cooler, its cooling capability is high, and the EGR gas can be made to flow into a surge tank in a state where heat of the EGR gas has been sufficiently emitted.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: June 17, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shingo Korenaga, Shigeki Miyashita, Hiroki Ito, Yusuke Saitou, Kouhei Kiyota
  • Patent number: 8739527
    Abstract: A method for improving operation of a turbocharged engine is presented. In one embodiment, the method may reduce engine emissions and improve engine efficiency during an engine start.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: June 3, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Joseph Norman Ulrey, Ross Dykstra Pursifull
  • Patent number: 8733328
    Abstract: In a method for controlling operation of an engine in which an EGR system is incorporated therein, when the engine is in a pressure-accumulable operational state in which EGR gas can be pressure-accumulated in an EGR passage between an EGR control valve and an on-off valve, these valves are brought into a full closed state, respectively. In addition, when an intake pressure transmitted from an air intake passage to the engine becomes more than or equal to a target value of the intake pressure set based on an operational state of the engine, the on-off valve is switched to a full open state, and then the on-off valve is switched to the full closed state again after elapse of a predetermined time, and high-pressure EGR gas of a low oxygen concentration is temporarily stored in the EGR passage.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: May 27, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Naruto Yamane
  • Patent number: 8733102
    Abstract: A method for operation of a high pressure exhaust-gas recirculation (EGR) system is provided. The method includes transferring heat from an exhaust flow through an EGR cooler to an engine coolant, the EGR cooler coupled to an EGR line fluidly coupled in parallel with a turbine and directing a controlled portion of the exhaust flow from the EGR cooler to an engine intake. The method further includes directing another controlled portion of the exhaust flow from the EGR cooler to the surrounding atmosphere.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: May 27, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Hans Guenter Quix, Christian Winge Vigild
  • Patent number: 8726656
    Abstract: A power assembly includes an internal combustion engine including an air intake line and an exhaust gas line having at least one heat exchanger. The power assembly further includes a Brayton cycle system capable of providing additional power to the main internal combustion engine and that includes a gas compressor, a fuel burning heater and a turbine linked to the compressor so that air is drawn into the compressor where it is pressurized, the pressurized air is further heated by flowing through at least one heat exchanger where it exchanges heat with exhaust gases from the main internal combustion engine, the heated and pressurized air is further heated by the fuel burning heater and is thereafter expanded through the turbine where a first fraction of the work extracted by the turbine is used to drive the compressor and a second fraction of the work extracted by the turbine is used to bring additional energy.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: May 20, 2014
    Assignee: Renault Trucks
    Inventor: Marc Lejeune
  • Patent number: 8726658
    Abstract: Methods and systems are provided for an engine including a first turbocharger having a first compressor and a second turbocharger having a second compressor. An EGR differential between the first compressor and the second compressor may be increased under a condensation condition, and decreased under a surge condition. The EGR differential may also be decreased when a compressor outlet temperature exceeds an outlet temperature threshold.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: May 20, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Daniel Joseph Styles, Brad Alan Boyer, Satheesh Makkapati
  • Patent number: 8726657
    Abstract: A power plant includes an engine configured to receive charge air and produce exhaust. A first turbo machine is configured to be driven by the exhaust and drive a compressor that receives air. The compressor is configured to produce the charge air. A second turbo machine is configured to receive the charge air and rotationally drive a pump in response thereto. The pump is configured to receive an EGR from the exhaust and introduce the pumped EGR to the charge air. The power plant also includes an exhaust gas recirculation passage. The second turbo machine includes a turbine rotationally coupled to the pump. The turbine has an expanded air passage, and the pump is arranged in the exhaust gas recirculation passage. A pre-cooler is arranged in the expanded air passage and in the exhaust gas recirculation passage upstream from the pump.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: May 20, 2014
    Assignee: AVL Powertrain Engineering, Inc.
    Inventor: Gary Hunter
  • Patent number: 8726660
    Abstract: A supercharger compressor includes a plurality of rotors rotatably mounted in a housing, a first inlet for air, a second inlet for recirculated exhaust gas, and a flow separator. The flow separator is arranged interior the housing and configured to form a slideable seal with at least one rotor of the plurality of rotors, the slideable seal fluidically isolating the first inlet from the second inlet, at least in part, and retarding pressure equalization therebetween.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: May 20, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Brad Alan Boyer, Eric Warren Curtis
  • Publication number: 20140130493
    Abstract: A turbocharged motor vehicle engine system includes an engine having an intake manifold, an exhaust manifold, and a crankcase ventilation outlet. A turbocharger includes a turbine having an inlet fluidly connected to the exhaust manifold through an exhaust conduit and a turbo compressor having an outlet fluidly connected to the intake manifold through an inlet conduit. The turbo compressor also includes an inlet. A crankcase gas conditioning member includes an inlet section fluidly connected to the crankcase ventilation outlet and an outlet section fluidly connected to the turbo compressor inlet. An idle bypass conduit includes an inlet portion fluidly connected to the outlet section of the crankcase gas conditioning member and an outlet portion fluidly connected to the inlet conduit. The idle bypass conduit is configured and disposed to selectively bypass the turbo charger while the engine is operating at an idle.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 15, 2014
    Applicant: GM Global Technology Operations LLC
    Inventors: Thomas A. Spix, Neil G. Klueber
  • Publication number: 20140130494
    Abstract: In a air compressing device of an engine, a supercharger interposed in an EGR pipe diverging from a portion of an exhaust pipe of the engine on the downstream side of a turbine of a turbocharger, pressurizing an EGR gas introduced into an EGR pipe by a compressor driven by rotation of the engine and supplying the pressurized EGR gas to an intake manifold of the engine, and control structure for adjusting an opening of a throttle valve arranged in a portion of the EGR pipe on the downstream side of the compressor of the supercharger and controlling a supply amount of the EGR gas supplied from the compressor to the intake manifold.
    Type: Application
    Filed: October 30, 2013
    Publication date: May 15, 2014
    Inventors: Hiroyuki HASEGAWA, Kinpei ASAZUMA
  • Publication number: 20140130495
    Abstract: The invention relates to a method for operating an internal combustion engine, a turbine of an exhaust gas turbocharger situated in an exhaust system of the internal combustion engine being driven by exhaust gas from the internal combustion engine, and a compressor of the exhaust gas turbocharger powered by the turbine and situated in a combustion air system of the internal combustion engine compressing combustion air, exhaust gas being diverted in a high pressure exhaust gas recirculation loop upstream from the turbine and mixed with the combustion air downstream from the compressor, exhaust gas being diverted in a low pressure exhaust gas recirculation loop downstream from the turbine and mixed with the combustion air upstream from the compressor, exhaust gas being purified by a low pressure exhaust gas recirculation filter in the LP-EGR loop, a predetermined value for a total exhaust gas recirculation flow.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 15, 2014
    Applicant: Volkswagen Aktiengesellschaft
    Inventors: Ekkehard POTT, Bernd Hahne
  • Patent number: 8720202
    Abstract: An internal combustion engine having an exhaust gas recirculation device for recirculating exhaust gas of the internal combustion engine to a fresh-air side of the internal combustion engine. For this purpose, it is provided that the exhaust gas recirculation device has at least one compressor for compressing the exhaust gas supplied to the fresh-air side of the internal combustion engine.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: May 13, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Juergen Stegmaier, Martin Cichon, Manfred Schmitt, Bernd Banzhaf, Achim Schmidt
  • Patent number: 8713936
    Abstract: One embodiment includes a housing (12) and a valve (10) to be used in an internal combustion engine exhaust breathing system (14). The housing (12) may define one or more inlet passages that receive fluid-flow, and may also define one or more outlet passages that deliver fluid-flow. The valve (10) regulates fluid-flow through the housing (12) and between the passages.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: May 6, 2014
    Assignee: BorgWarner Inc.
    Inventor: Volker Joergl
  • Patent number: 8713937
    Abstract: Methods and systems are provided for a boosted engine having a split intake system coupled to a split exhaust system. Aircharges of differing composition, pressure, and temperature may be delivered to the engine through the split intake system at different points of an engine cycle. In this way, boost and EGR benefits may be extended.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: May 6, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Ross Dykstra Pursifull, Joseph Norman Ulrey
  • Publication number: 20140116374
    Abstract: Disclosed is a turbocharged internal combustion piston engine system that includes a waste-heat recovery system. The waste-heat recovery system involves injecting heated water into the cylinders during combustion to increase engine power and efficiency and to reduce emissions. The engine can be a spark or compression ignition type of engine, and can utilize fuels including but not limited to diesel, natural gas, gasoline, and ethanol. The engine also includes a turbocharger that utilizes a turbine in the exhaust gas flow to provide power to a compressor in the intake air flow to pressurize the intake air and provide additional charge flow to the engine to increase engine output.
    Type: Application
    Filed: October 31, 2013
    Publication date: May 1, 2014
    Inventor: Jared William Brown
  • Publication number: 20140109571
    Abstract: A method includes combusting air within a plurality of cylinders of an internal combustion engine by injecting a fuel into the plurality of cylinders. The method further includes expanding a first portion of an exhaust gas generated from the plurality of combustion cylinders via a turbine. The method further includes controlling at least one of feeding a second portion of the exhaust gas via an exhaust channel bypassing the turbine; and recirculating a third portion of the exhaust gas to the plurality of combustion cylinders via a recirculation channel, as a function of an intake manifold air temperature and pressure at which the engine is operated.
    Type: Application
    Filed: October 19, 2012
    Publication date: April 24, 2014
    Applicant: General Electric Company
    Inventors: Roy James Primus, Omowoleola Chukwuemeka Akinyemi, Thomas Michael Lavertu, James Robert Mischler, Venu Gopal Gummadavelli
  • Publication number: 20140109884
    Abstract: Engine coolant heating systems and methods that improve waste heat recovery. The systems and methods include a piped connection between the outlet of an exhaust gas recirculation cooler and the main exhaust pipe leading to the vehicle's tailpipe. The systems and methods also include at least one additional valve in the exhaust stream for directing the flow of exhaust appropriately given specific driving conditions.
    Type: Application
    Filed: October 23, 2012
    Publication date: April 24, 2014
    Inventors: Daniel E Hornback, Kevin J Laboe, Gregg T Black