With Exhaust Gas Recirculation Patents (Class 60/605.2)
  • Patent number: 9145851
    Abstract: A method and device for diagnosing a low pressure exhaust gas recirculation system (LPEGRS) of an internal combustion engine having an intake area for supplying fresh air which includes in succession in the flow direction a first section having a low pressure in which an air mass flow sensor is situated, a compressor and a second section having a high pressure, the engine exhaust area including a second section having a low exhaust gas pressure, and the LPEGRS which has an adjustable LPEGR valve recirculating at least a portion of the exhaust gas in the second section of the exhaust area to the first section of the intake area.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: September 29, 2015
    Assignee: ROBERT BOSCH GMBH
    Inventors: Thomas Bossmeyer, Stefan Motz, Jens Pawlak
  • Patent number: 9140168
    Abstract: An exhaust system for an engine comprises an exhaust heat recovery apparatus configured to receive exhaust gas from the engine and comprises a first flow passage in fluid communication with the exhaust gas and a second flow passage in fluid communication with the exhaust gas. A heat exchanger/energy recovery unit is disposed in the second flow passage and has a working fluid circulating therethrough for exchange of heat from the exhaust gas to the working fluid. A control valve is disposed downstream of the first and the second flow passages in a low temperature region of the exhaust heat recovery apparatus to direct exhaust gas through the first flow passage or the second flow passage.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: September 22, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Michael G. Reynolds
  • Patent number: 9140216
    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: Grant
    Filed: May 30, 2012
    Date of Patent: September 22, 2015
    Assignee: FPT Motorenforschung AG
    Inventor: Christian Maier
  • Patent number: 9133793
    Abstract: According to one embodiment of the invention, a compressor housing includes a compressor inlet in fluid communication with a compressor volute configured to house a compressor wheel, the compressor inlet configured to provide a first air flow to the compressor wheel and a compressor outlet in fluid communication with the compressor volute, the compressor outlet configured to direct a compressed gas to an intake manifold. The compressor housing further includes an exhaust gas recirculation inlet port in fluid communication with the compressor volute, the exhaust gas recirculation inlet port being configured to combine an exhaust gas flow with the air flow to the compressor wheel.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: September 15, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Ko-Jen Wu
  • Patent number: 9121330
    Abstract: A porting system for a turbo-charged loop scavenged two-stroke engine includes a cylinder including a cylinder wall and a cylinder head. At least one inlet port is provided in the cylinder wall. The at least one inlet port is arranged a first distance from the cylinder head and fluidically connected to a compressor portion of a turbo-charger. A first exhaust port is provided in the cylinder wall. The first exhaust port is arranged a second distance from the cylinder head and is fluidically connected to a turbine portion of the turbo-charger through first exhaust passage. A second exhaust port is provided in the cylinder wall. The second exhaust port is arranged a third distance from the cylinder head that is greater than the second distance and the second exhaust passage is fluidically connected to a second exhaust passage bypassing the turbine portion.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: September 1, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Robert D. Straub
  • Patent number: 9080536
    Abstract: An engine system includes a first cylinder group, a second cylinder group, an inlet manifold coupled to the first cylinder group and the second cylinder group, an inlet passage coupled to the inlet manifold to provide inlet air to the inlet manifold, a first exhaust manifold coupled to the first cylinder group, a second exhaust manifold coupled to the second cylinder group, and a mixer pipe positioned within the second exhaust manifold and/or the intake passage to mix exhaust gas recirculation (EGR) gases exhausted by the second cylinder group that are delivered through the second exhaust manifold with inlet air. The mixer pipe forms an inlet end that is coupled to the second exhaust manifold and an outlet end that is located upstream of the cylinders in the first cylinder group and the cylinders in the second cylinder group.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: July 14, 2015
    Assignee: General Electric Company
    Inventors: Paul Lloyd Flynn, Eric David Peters, Michael Allen Easter
  • Patent number: 9080523
    Abstract: Methods and systems are provided for a boosted engine having a split exhaust system. One method includes reducing knock by flowing a combination of exhaust from towards the end of an exhaust stroke and blowthrough air to the intake of a compressor via a compressor inlet valve.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: July 14, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Joseph Norman Ulrey, Brad Alan Boyer
  • Patent number: 9074560
    Abstract: An exhaust gas recirculation control apparatus includes: an EGR valve adjusting a flow rate of EGR gas recirculated from an exhaust manifold to an intake manifold; a manifold absolute pressure (MAP) sensor measuring pressure inside the intake manifold; a throttle valve controlling the amount of inflow air; an igniter spraying fuel; an acceleration pedal angular position sensor; a crank position sensor measuring engine RPM; a vehicle speed sensor measuring a speed of a vehicle; and a control portion receiving a pressure signal from the MAP sensor, calculating a ratio of the EGR gas for a total volume of the intake manifold by using pressure variance inside the intake manifold, calculating pressure of the EGR gas by multiplying the pressure of the intake manifold and the ratio of the EGR gas, and converting the pressure of the EGR gas to a flow rate of the EGR gas.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: July 7, 2015
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Seungbum Kim, Jeong Nam Park
  • Patent number: 9062635
    Abstract: A system and method are provided for estimating an operating parameter of an exhaust manifold of an engine. In the system, a flow value is determined that corresponds to a flow rate of exhaust gas through an EGR conduit fluidly coupled between the exhaust manifold and the intake manifold. The EGR conduit includes an exhaust gas cooler disposed in-line with the EGR conduit and a property of the exhaust gas exiting an exhaust gas outlet of the cooler is measured. The operating parameter of the exhaust manifold is estimated as a function of at least the flow value and the property of the exhaust gas exiting the exhaust gas outlet of the cooler. Illustratively, the operating parameter of the exhaust manifold may be exhaust manifold pressure and/or temperature.
    Type: Grant
    Filed: September 25, 2011
    Date of Patent: June 23, 2015
    Assignee: Cummins Inc.
    Inventors: John N. Chi, Indranil Brahma
  • Patent number: 9057331
    Abstract: A control device for an internal combustion engine is mounted on a vehicle, and includes an engine, a catalyst and a control unit. The engine is a bifuel engine using gas fuel and liquid fuel as its fuel source. The control unit makes an air fuel ratio rich and increases a proportion of the gas fuel if a temperature of the catalyst is higher than a predetermined upper limit value at a time when the liquid fuel is used.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: June 16, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Koichi Hoshi, Takashi Watanabe, Yoshihisa Shinoda
  • Patent number: 9052259
    Abstract: Embodiments of a particle sensor are provided. In one example, a particle sensor for an exhaust system comprises at least two inlet openings for an exhaust-gas flow of the exhaust system, wherein the inlet openings are of different sizes, and at least two sensor elements, wherein in each case one sensor element is arranged downstream of one inlet opening. In this way, the relative proportion of different-sized particles within the exhaust-gas flow may be determined.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: June 9, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Yasser Mohamed Sayed Yacoub, Matthew Allen Schneider
  • Patent number: 9038611
    Abstract: A method for controlling combustion in an engine is provided. The method comprises under a first condition, adjusting an EGR amount of a total cylinder charge in response to engine out NOx levels being below a first threshold. In this way, NOx levels may be used as feedback to control combustion stability.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: May 26, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Peter Mitchell Lyon, Chris Riffle, Michiel J. Van Nieuwstadt, Frank M. Korpics, Jeff Reich, Dean Pennala
  • Publication number: 20150128587
    Abstract: A method includes operating a spark ignition engine and flowing low pressure exhaust gas recirculation (EGR) from an exhaust to an inlet of the spark ignition engine. The method includes interpreting a parameter affecting an operation of the spark ignition engine, and determining a knock index value in response to the parameter. The method further includes reducing a likelihood of engine knock in response to the knock index value exceeding a knock threshold value.
    Type: Application
    Filed: January 26, 2015
    Publication date: May 14, 2015
    Inventors: Marten H. Dane, Steven J. Kolhouse, Thomas M. Yonushonis, J. Stephen Wills, Samuel C. Geckler
  • Publication number: 20150121864
    Abstract: Methods and systems are provided for estimating a positive crankcase ventilation (PCV) flow based on outputs of an intake manifold oxygen sensor. For example, during engine operation when exhaust gas recirculation (EGR) and fuel canister purge are disabled, PCV flow may be estimated based on a difference between a first output of the sensor with boost enabled and a second output of the sensor with boost disabled. Then, during subsequent operation wherein EGR is enabled, PCV flow is enabled, and purge is disabled, a third output of the sensor may be adjusted based on the estimated PCV flow.
    Type: Application
    Filed: November 6, 2013
    Publication date: May 7, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Gopichandra Surnilla, James Alfred Hilditch, Matthew John Gerhart, Lynn Aimee Chesney, Stephen B. Smith
  • Patent number: 9021808
    Abstract: A Rankine cycle waste heat recovery system associated with an internal combustion engine is in a configuration that enables handling of exhaust gas recirculation (EGR) gas by using the energy recovered from a Rankine cycle waste heat recovery system. The system includes a control module for regulating various function of the internal combustion engine and its associated systems along with the Rankine cycle waste heat recovery system.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: May 5, 2015
    Assignee: Cummins Intellectual Property, Inc.
    Inventors: Christopher R. Nelson, Timothy C. Ernst
  • Patent number: 9021805
    Abstract: Methods and systems are disclosed for controlling an exhaust gas recirculation valve in an engine by determining errors in exhaust backpressure estimates and adapting EGR flow estimations based on these errors to meet target EGR dilutions in the engine. In one example approach, a method comprises adjusting valve position based on desired EGR flow and estimated EGR flow, where the estimated flow is based on estimated exhaust backpressure, and the estimated exhaust backpressure is updated based on errors between actual and desired intake oxygen concentration.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: May 5, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Imad Hassan Makki, Timothy Joseph Clark
  • Patent number: 9021804
    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: Grant
    Filed: March 14, 2013
    Date of Patent: May 5, 2015
    Assignee: Ford Global Technologies, LLC
    Inventor: Xiaogang Zhang
  • Publication number: 20150114366
    Abstract: Systems and method for extracting energy from a gas are disclosed herein. In particular, systems and methods for implementing a series of thermodynamic transformations by means of which it is possible to extract useful work from a gas carrying thermal energy due its thermodynamic state are disclosed. An example system for extracting energy from a cycle gas can include an expander for expanding the cycle gas, a heat exchanger in fluid connection with the expander for cooling the expanded cycle gas while maintaining the expanded cycle gas at an approximately constant pressure, and a compressor in fluid connection with the heat exchanger for compressing the cooled cycle gas.
    Type: Application
    Filed: March 15, 2013
    Publication date: April 30, 2015
    Inventors: Codrin-Gruie Cantemir, Fabio Chiara, Marcello Canova
  • Publication number: 20150113985
    Abstract: The present invention discloses an exhaust gas purification system for an internal combustion engine, which is provided with: a low pressure EGR mechanism that is equipped with a low pressure EGR passage and a low pressure EGR valve; a selective reduction type catalyst that is arranged in a portion of the exhaust passage downstream; a supply device which serves to supply an ammonia derived compound to said selective reduction type catalyst; and a control unit that causes said supply device to supply the ammonia derived compound when said low pressure EGR valve is in a valve open state, makes the amount of the ammonia derived compound supplied from said supply device larger in cases where an amount of the low pressure EGR gas flowing through said low pressure EGR passage is large, in comparison with the case where it is small.
    Type: Application
    Filed: December 12, 2014
    Publication date: April 30, 2015
    Inventors: Bungo KAWAGUCHI, Tomihisa ODA, Tomomi ONISHI, Masaaki SATO, Satoshi KOBAYAKAWA, Takeru SHIRASAWA
  • Patent number: 9010112
    Abstract: Various systems and methods are described for a charge air cooler coupled to an engine. One example method comprises collecting condensate discharged from the cooler in a condensation trap coupled to an outside surface of a bend in an outlet duct of the cooler; during a first condition, temporarily storing the condensate in a reservoir of the condensation trap; and, during first and second conditions, releasing the condensate to the outlet duct in a direction of airflow via a tube.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: April 21, 2015
    Assignee: Ford Global Technologies, LLC
    Inventor: James Raymond Palm
  • Patent number: 9010113
    Abstract: A control apparatus judges an abnormality of an internal combustion engine. The engine has an external EGR apparatus, including an exhaust gas recirculation passage that connects an exhaust passage with an intake passage, and an EGR valve that can increase and decrease an outside EGR flow quantity that flows back into the intake passage from said exhaust passage through the exhaust gas recirculation passage by being adjusted in its opening angle. The control apparatus acquires an output value of the engine and determines occurrence of abnormality in the external EGR apparatus according to a predetermined criterion based on a difference between an output of the engine in which a first EGR flow quantity is flown back and an output of the engine in which a second EGR flow quantity is flown back.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: April 21, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Kenji Harima
  • Publication number: 20150101328
    Abstract: Methods and systems are provided for accurately learning the zero point of an intake gas oxygen sensor in varying ambient humidity conditions. The learned zero point is corrected based on an estimated ambient humidity to calibrate the reading for dry air conditions or standard humidity conditions. EGR control is performed by comparing the output of an intake oxygen sensor during EGR conditions relative to the humidity-corrected zero point.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 16, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Gopichandra Surnilla, Timothy Joseph Clark, Richard E. Soltis, Jacobus Hendrik Visser, Christopher House
  • Publication number: 20150101327
    Abstract: Methods and systems are provided for accurately learning the zero point of an intake gas oxygen sensor during selected engine no-fueling conditions. The learned zero point is used to infer EGR flow and accordingly adjust EGR valve control. In addition, EGR valve leakage is diagnosed based on the zero point learned during a DFSO adaptation relative to a zero point learned during an idle adaptation.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 16, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Timothy Joseph Clark, Gopichandra Surnilla, Matthew John Gerhart, Daniel Joseph Styles
  • Publication number: 20150101326
    Abstract: Methods and systems are provided for accurately learning the zero point of an intake gas oxygen sensor during selected idling conditions. The learned zero point is used to infer EGR flow and accordingly adjust EGR valve control. In addition, EGR valve leakage is diagnosed based on the zero point learned during an idle adaptation relative to a zero point learned during a DFSO adaptation.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 16, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Gopichandra Surnilla, Richard E. Soltis, James Alfred Hilditch, Timothy Joseph Clark, Matthew John Gerhart, Todd Anthony Rumpsa
  • Patent number: 9008951
    Abstract: A fuel admission control unit controls a diesel engine and ensures compatibility between exhaust gas performance and engine speed response performance by considering residual oxygen in EGR gas. The control unit includes an estimation excess air ratio ?s computing unit that is an arithmetic section to compute an estimation excess air ratio ?s, from the quantity of the fuel injected by a fuel injection valve into a cylinder, the intake air flow rate, and the flow rate of the residual oxygen in the EGR gas that returns back into the intake air system. The control unit also includes a fuel admission control unit that controls the fuel flow rate under hard acceleration, based on the estimation excess air ratio ?s that is computed by the estimation excess air ratio ?s computing unit.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: April 14, 2015
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kazunari Ide, Satoshi Iwasaki
  • Patent number: 9003792
    Abstract: In an exemplary embodiment, an internal combustion engine includes an oxidation catalyst configured to receive an exhaust gas flow from the internal combustion engine, a urea injector positioned downstream of the oxidation catalyst to inject a urea flow into the exhaust gas flow and a mixer positioned downstream of the urea injector to mix the exhaust gas flow and the urea flow to form a mixed exhaust gas and urea flow. The engine also includes a particulate filter and catalytic reduction assembly positioned downstream of the mixer to receive the mixed exhaust and urea flow from the mixer to form a treated exhaust gas flow and an exhaust gas recirculation system coupled to the particulate filter to receive a portion of the treated exhaust gas flow and recirculate the portion of the exhaust gas flow to be mixed with a fresh air flow for the internal combustion engine.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: April 14, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Manuel Angel Gonzalez Delgado, Julian C. Tan, Joshua Clifford Bedford, Yong Miao, Naser I. Hineiti, Steven M. Yocum
  • Publication number: 20150089941
    Abstract: An exhaust gas recirculation control device of an engine is provided. The device includes: an exhaust turbocharger having a turbine disposed in an exhaust passage and a compressor disposed in an intake passage; an intercooler disposed in the intake passage downstream of the compressor; a low-pressure EGR passage connecting the exhaust passage downstream of the turbine to the intake passage upstream of the compressor; a low-pressure EGR valve disposed in the low-pressure EGR passage and for changing a cross-sectional area thereof; a high-pressure EGR passage connecting the exhaust passage upstream of the turbine to the intake passage downstream of the intercooler; a high-pressure EGR valve disposed in the high-pressure EGR passage and for changing a cross-sectional area thereof; a valve control device for controlling openings of the low-pressure and high-pressure EGR valves; and a gear range detector for detecting a gear range of a transmission.
    Type: Application
    Filed: August 27, 2014
    Publication date: April 2, 2015
    Inventors: Kota Maekawa, Kenji Tanimura, Eiji Nakai, Motoshi Kataoka, Masanobu Kanno
  • Publication number: 20150089942
    Abstract: An exhaust gas recirculation control device of an engine includes an exhaust turbocharger having a turbine disposed in an exhaust passage and a compressor disposed in an intake passage, low-pressure and high-pressure EGR passages connecting the exhaust passage downstream of the turbine to the intake passage upstream of the compressor and connecting the exhaust passage upstream of the turbine with the intake passage downstream of the compressor, respectively, low-pressure and high-pressure EGR valves disposed in the low-pressure and high-pressure EGR passages and for changing cross-sectional areas thereof, respectively, a valve control device for controlling openings of the low-pressure and high-pressure EGR valves, a total intake gas amount detector for detecting a total intake gas amount, a fresh air amount detector for detecting a fresh air amount, and a pressure difference detector for detecting a pressure difference between the exhaust and intake passage sides of the high-pressure EGR valve.
    Type: Application
    Filed: August 27, 2014
    Publication date: April 2, 2015
    Inventors: Tomoyuki Kihara, Daishi Ikeda, Yosuke Honda, Takashi Hatano
  • Publication number: 20150082790
    Abstract: A low-pressure-loop EGR apparatus of an engine includes an EGR passage to allow part of exhaust gas discharged from a combustion chamber to return as EGR gas to the combustion chamber, and an EGR valve to regulate a flow of EGR gas in the EGR passage. This passage has an inlet connected to an exhaust passage downstream of a turbine and an outlet connected to an intake passage upstream of a compressor. In the intake passage, an intake bypass passage is provided to connect an upstream portion and a downstream part from the compressor. An ABV is provided in the passage. To remove EGR gas remaining in the ABV, one end of a residual gas removal passage is connected to the intake passage downstream of a throttle valve and the other end of the same passage is connected to the ABV.
    Type: Application
    Filed: August 28, 2014
    Publication date: March 26, 2015
    Inventors: Mamoru YOSHIOKA, Takehide NAKAMURA
  • Patent number: 8984878
    Abstract: An internal combustion engine has a cylinder head having at least one cylinder. A cover is connected to the cylinder head and covers the cylinder and related valve train components. An exhaust gas turbocharger powered by the engine's exhaust system delivers compressed gasses to the intake system. An exhaust gas recirculation system branches off from the exhaust system downstream of the turbocharger and feeds into the intake system upstream of the turbocharger. A coolant-fed charge air cooler is disposed between the cylinder head and the cover, and at a point that is a geodetically highest point in the intake system when the internal combustion engine is in an installed position. This configuration prevents any liquid that has condensed out of the charge air during cooling from collecting in the cooler and/or in the intake system between the cooler and the at least one cylinder.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: March 24, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Hans-Guenter Grosch, Andreas Kuske, Christian Winge Vigild
  • Patent number: 8985088
    Abstract: Various systems and method for controlling exhaust gas recirculation (EGR) in an internal combustion engine are provided. In one embodiment, a method includes injecting fuel to a subset of cylinders that includes less than all cylinders of a first cylinder group to obtain a target EGR rate. The first cylinder group provides exhaust gas through an exhaust gas recirculation (EGR) passage structure fluidly coupled between the first cylinder group and an intake passage structure. The method further includes injecting fuel to at least one cylinder of a second cylinder group. The second cylinder group provides substantially no exhaust gas through the EGR passage structure.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: March 24, 2015
    Assignee: General Electric Company
    Inventors: Neil Xavier Blythe, Shawn Michael Gallagher, James Robert Mischler, Luke Henry
  • Publication number: 20150075159
    Abstract: A supercharged internal combustion engine, comprising a high-pressure turbine connected to a channel of a low-pressure turbine and a bypass line, branching from upstream the high-pressure turbine, connectable to the channels of the low-pressure turbine via a control element positioned within the bypass line, is provided. Adjusting the control element fluidly connects each of the channels of the low-pressure turbine to the bypass line responsive to the exhaust-gas flow rate to optimize the performance of the engine.
    Type: Application
    Filed: August 26, 2014
    Publication date: March 19, 2015
    Inventors: Joerg Kemmerling, Franz Arnd Sommerhoff, Vanco Smiljanovski, Helmut Matthias Kindl, Andreas Kuske
  • Publication number: 20150075162
    Abstract: In an engine provided with a supercharger and a low pressure loop EGR apparatus, an ECU controls an EGR valve to fully close when a detected operating condition is a predetermined operating condition. An outlet of an EGR passage is located at a higher position than an inlet in a vertical direction to allow condensed water to flow downward from downstream to upstream of the EGR valve and flow downward through the EGR passage to an exhaust passage. When the EGR valve has to be controlled to fully close, the ECU forcibly opens the EGR valve when a predetermined discharge condition is established to discharge the condensed water from a downstream side of the EGR valve.
    Type: Application
    Filed: July 24, 2014
    Publication date: March 19, 2015
    Inventors: Mamoru YOSHIOKA, Takehide NAKAMURA
  • Publication number: 20150068204
    Abstract: An engine system may include a main intake line, a supplementary intake line branched from the main intake line and joined to the main intake line, an intake bypass valve mounted to the main intake line, a main exhaust line mounted to an exhaust manifold, a supplementary exhaust line branched from the exhaust manifold and joined to the main exhaust line, an exhaust bypass valve mounted to the main exhaust line and selectively opening the main exhaust line, a turbocharger disposed adjacent to the supplementary exhaust line and operated by exhaust gas passing through the supplementary exhaust line, and a control unit for controlling the intake bypass valve and the exhaust bypass valve depending on an operation condition, wherein the exhaust gas is re-circulated from an upstream side of the exhaust bypass valve to the main intake line passing through an EGR (Exhaust Gas Recirculation) cooler and an EGR valve.
    Type: Application
    Filed: December 20, 2013
    Publication date: March 12, 2015
    Applicant: Hyundai Motor Company
    Inventors: Dong Hee Han, Seung Kook Han, Hyeon Ho Kim, Il Joong Hwang, Dong Ho Chu, Jong Il Park, Yoon Joo Kim, Hyuk Im, Hyun Jun Lim
  • Publication number: 20150052891
    Abstract: A turbocharging device of an engine for a vehicle is provided. The turbocharging device includes a turbocharger for turbocharging intake air, an introduction passage connected to an introducing section of a compressor of the turbocharger, a discharge passage connected to a discharging section of the compressor of the turbocharger, a bypass passage connecting the introduction passage to the discharge passage and bypassing the compressor, and a bypass valve for opening and closing the bypass passage. A throttle part throttling a flow passage area of the introduction passage is formed in an inner circumferential surface of a part of the introduction passage, upstream of a connection part of the introduction passage with the bypass passage.
    Type: Application
    Filed: August 18, 2014
    Publication date: February 26, 2015
    Inventors: Yoshiyuki Uehane, Junji Umemura, Atsuhiro Hatabu
  • Patent number: 8960168
    Abstract: An arrangement for cooling of recirculating exhaust gases of a combustion engine (2) in a vehicle (1). The arrangement comprises a first EGR cooler (14), a driving means (15, 31) adapted to driving air through the first EGR cooler (14) in order to cool the exhaust gases in a return line (11) which are subjected to a first step of cooling in the first EGR cooler (14), and at least one second EGR cooler (19, 20) in which the exhaust gases in the return line (11) are intended to undergo a second step of cooling. The arrangement comprises an air line (16) which extends at least from the first EGR cooler (14) to the exhaust pipe (4) at a location between the turbine (5) and the exhaust-treating component (18a, 18b), which air line (16) is adapted to leading warm air from the first EGR cooler (14) into the exhaust line (4) at said location.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: February 24, 2015
    Assignee: Scania CB AB
    Inventors: Zoltan Kardos, Erik Söderberg, Rolf Dybdal
  • Publication number: 20150047347
    Abstract: Methods and systems are provided for managing a compressor temperature using EGR to address surge and condensation. A variable mixture of cooled compressor recirculation flow and hot EGR is provided to a compressor inlet. A composition of the mixture is adjusted to maintain a compressor inlet temperature sufficiently warm so as to reduce ingestion of condensation, and a compressor outlet temperature sufficiently cold to be within component temperature limits with flow above the surge limit.
    Type: Application
    Filed: August 13, 2013
    Publication date: February 19, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Joseph Norman Ulrey, Julia Helen Buckland
  • Publication number: 20150047348
    Abstract: An exhaust gas purification device to elevate the exhaust gas temperature on an inlet side of a diesel particulate filter. An oxidation catalyst and the diesel particulate filter are arranged in an exhaust path between exhaust ports of an engine and a turbocharger. The device also includes a urea spraying nozzle on an upstream side of the diesel particulate filter, and a selective catalytic reduction unit in an exhaust pipe on a downstream side of the turbocharger.
    Type: Application
    Filed: March 13, 2013
    Publication date: February 19, 2015
    Applicant: ISUZU MOTORS LIMITED
    Inventor: Kazuo Osumi
  • Publication number: 20150047346
    Abstract: Methods and systems are provided for varying a proportion of compressed air recirculated to a compressor inlet from a location downstream of the compressor and upstream of a charge air cooler and a location downstream of the charge air cooler. A temperature-controlled compressor recirculation flow is used to reduce condensation from EGR being ingested into the compressor. The temperature-controlled compressor recirculation flow is also used to address compressor surge.
    Type: Application
    Filed: August 13, 2013
    Publication date: February 19, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Daniel Joseph Styles, Julia Helen Buckland, Joseph Norman Ulrey, James Leiby, Gregory Patrick McConville
  • Patent number: 8955317
    Abstract: In a method for operating a supercharged internal combustion engine of a motor vehicle, at the same time an internal exhaust gas recirculation and an external exhaust gas recirculation are carried out in an engine operating range with lean burn operation modes, wherein the exhaust gas recirculation rate of the internal and the external exhaust gas recirculation is increased with increasing load and/or speed of the internal combustion engine in the lean engine operating range and, at high engine speeds and loads, a homogenous mixture operation is carried out. The invention also reside in an internal combustion engine for performing the method.
    Type: Grant
    Filed: December 16, 2012
    Date of Patent: February 17, 2015
    Assignee: Daimler AG
    Inventors: Markus Schilling, Frank Otto, Klaus Roessler
  • Patent number: 8950182
    Abstract: A method of adjusting an external exhaust gas recirculation mixture in response to engine knock of a spark-ignition turbocharged engine, and related products.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: February 10, 2015
    Assignee: BorgWarner Inc.
    Inventor: David B. Roth
  • Publication number: 20150033735
    Abstract: Methods and systems are disclosed for controlling an exhaust gas recirculation valve in an engine by determining errors in exhaust backpressure estimates and adapting EGR flow estimations based on these errors to meet target EGR dilutions in the engine. In one example approach, a method comprises adjusting valve position based on desired EGR flow and estimated EGR flow, where the estimated flow is based on estimated exhaust backpressure, and the estimated exhaust backpressure is updated based on errors between actual and desired intake oxygen concentration.
    Type: Application
    Filed: July 31, 2013
    Publication date: February 5, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Imad Hassan Makki, Timothy Joseph Clark
  • Publication number: 20150033736
    Abstract: Exhaust temperature management strategies for an opposed-piston, two-stroke engine with EGR are based on control of a ratio of the mass of fresh air and external EGR delivered to a cylinder to the mass of the trapped charge (density of the delivered charge multiplied by the trapped volume at port closing).
    Type: Application
    Filed: February 19, 2013
    Publication date: February 5, 2015
    Inventors: Christopher J. Kalebjian, Suramya D. Naik, Fabien G. Redon
  • Patent number: 8944034
    Abstract: The present disclosure relates to methods, apparatuses and systems to manage exhaust gas expelled from cylinders of an internal combustion engine. An exemplary system may comprise at least one cylinder of the engine configured to operate as a dedicated exhaust gas recirculation (EGR) cylinder, and wherein substantially all exhaust gas expelled from the dedicated EGR cylinder is recirculated to an intake system of the engine. In one embodiment, the system may include a flow restrictor configured and arranged to restrict a flow of the recirculated exhaust gas to the dedicated EGR cylinder without restricting a flow of the recirculated exhaust gas to the remaining cylinders of the engine. In another embodiment, exhaust gas may be expelled from the dedicated EGR cylinder in pulsations, and the intake system may be configured to reduce an amplitude of the pulsations of the exhaust gas expelled from the dedicated EGR cylinder.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: February 3, 2015
    Assignee: Southwest Research Institute
    Inventors: Jess W. Gingrich, Barrett W. Mangold, Steven H. Almaraz
  • Patent number: 8943823
    Abstract: A fluid handling system for a use with an engine is provided. The fluid-handling system may have a first turbine connected to receive a portion of an exhaust flow from the engine, a first compressor driven by the first turbine to pressurize an airflow, and a heat exchanger configured to receive a remaining portion of the exhaust flow from the engine and the airflow from the first compressor. The fluid-handling system may also have a second turbine connected to receive the airflow from the heat exchanger, and a generator driven by the second turbine to generate power.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: February 3, 2015
    Assignee: Caterpillar Inc.
    Inventor: Scott B. Fiveland
  • Patent number: 8938964
    Abstract: A Rankine circuit (40) includes, as a plurality of heat exchangers, an EGR cooler (36) of an EGR circuit and an exhaust gas heat exchanger (41) associated with an exhaust passage. The EGR cooler and the exhaust gas heat exchanger are arranged such that the EGR cooler is located upstream of the exhaust gas heat exchanger as viewed in the flowing direction of a working fluid in the Rankine circuit. The amount of heat transferred from EGR gas to the working fluid in the EGR cooler is controlled by a control unit (60) so that the temperature of the EGR gas detected by an EGR gas temperature detector (39) may fall within a predetermined temperature range (e.g., 150° C. to 200° C.).
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: January 27, 2015
    Assignee: Sanden Corporation
    Inventors: Yasuaki Kanou, Junichiro Kasuya
  • Patent number: 8938962
    Abstract: An exhaust system for an engine includes a first exhaust manifold configured to receive exhaust from the engine, a second exhaust manifold configured to receive exhaust from the engine in parallel with the first exhaust manifold, and at least two turbochargers configured to receive exhaust from the first and second exhaust manifolds. The system also includes a first turbocharger valve fluidly connected to one of the at least two turbochargers. The first turbocharger valve is configured to selectively fluidly connect the one of the at least two turbochargers to the first and second exhaust manifolds. The system further includes a recirculation circuit in fluid communication with the first exhaust manifold. The recirculation circuit includes a first recirculation valve configured to regulate passage of exhaust through the recirculation circuit.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: January 27, 2015
    Assignee: Caterpillar Inc.
    Inventor: David Andrew Pierpont
  • Patent number: 8938961
    Abstract: A disclosed method of operating an engine may include discharging exhaust gas from at least one combustion chamber of the engine. The method may also include recirculating at least a portion of the exhaust gas to the at least one combustion chamber through an EGR system, including directing at least a portion of the exhaust gas through an EGR duct. Additionally, the method may include sensing pressure in a portion of the EGR duct by directing the pressure to a first pressure sensor via a first sensor passage having a first end connected to a portion of the EGR duct and a second end connected to the first pressure sensor, while maintaining a temperature of gas in the first sensor passage adjacent the second end at a bulk temperature of at least about 75 percent of a bulk temperature of gas in the first sensor passage at the first end.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: January 27, 2015
    Assignee: Caterpillar Inc.
    Inventors: Matthew Edward Leustek, Justin Werner McMenamy, Jeffrey S. Morris, Matthew John Liening, Joseph John Stabnik, William Lyle Schell
  • Patent number: 8936070
    Abstract: A device for cooling a gas flow of an internal combustion engine includes a housing, an inlet and an outlet for a gas of the internal combustion engine, which is to be cooled, an inlet and an outlet for a liquid coolant, a heat exchanger for heat transfer between the gas and the coolant, a first wall section of the housing, wherein the first wall section is arranged between the coolant and the gas flow, and a second wall section of the housing, wherein the second wall section is arranged between the coolant and the atmosphere, wherein the first wall section and the second wall section are integrally formed in one piece.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: January 20, 2015
    Assignee: Behr GmbH & Co.KG
    Inventors: Peter Geskes, Bernd Grünenwald, Wolfgang Knödler
  • Patent number: 8936011
    Abstract: A method of imposing a variable load upon the internal combustion engine as it is typically used in the performance of degassing operations includes coupling a crankshaft of the internal combustion engine to a secondary internal combustion engine.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: January 20, 2015
    Assignee: BRB/Sherline, Inc.
    Inventor: Bernhardt R. Bruns