Having Means For Regenerating, Replacing, Or Feeding Liquid Or Solid Reagent Or Catalyst Patents (Class 60/295)
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Patent number: 8881511Abstract: The invention relates to a method for controlling a system for reducing the amount of NOx in the exhaust gases of a motor vehicle. The system comprises a storage chamber (8) which contains a pollutant-removing agent and which is arranged such that the temperature thereof is controlled by a heating device (9). The system further comprises a supply module (6) arranged so as to inject the pollutant-removing agent into the exhaust gases, the supply module (6) comprising a device for measuring the pressure (6a) or the temperature inside the storage chamber (8), as well as a device (6b) for proportioning the pollutant-removing agent.Type: GrantFiled: July 18, 2011Date of Patent: November 11, 2014Assignee: Aaqius & Aaqius S.A.Inventor: Arnaud Audouin
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Patent number: 8881507Abstract: A dosing system for delivering reductant to an exhaust gas treatment system of an internal combustion engine using air driven hydraulic pumps for closed-loop controlling reductant pressure and a two-stage PWM control method for controlling dosing rate. Reductant residue in the dosing systems is purged by using compressed air after a dosing process completes, and when the air driven hydraulic pumps are positioned inside a reductant tank, dedicated heating means for the pumps is not necessary. The air driven hydraulic pumps can also use low pressure compressed air, and the closed-loop pressure control together with the two-stage PWM control allow dosing accuracy insensitive to pressure variations in compressed air. These new features enable the dosing system use a variety of compressed air sources, including an engine turbo.Type: GrantFiled: August 22, 2012Date of Patent: November 11, 2014Inventors: Mi Yan, Baohua Qi
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Patent number: 8881509Abstract: A system for purifying an exhaust gas and an exhaust system having the same while preventing degradation of a selective reduction catalyst may include an exhaust pipe connected to an engine, the exhaust gas generated at the engine passing through the exhaust pipe, a particulate filter mounted on the exhaust pipe, coated with a selective reduction catalyst adapted to reduce nitrogen oxides contained in the exhaust gas by an injection of a reducing agent, and adapted to trap particulate matters contained in the exhaust gas, and one or more injectors adapted to inject the reducing agent and/or oxygen storage capacity material together or separately into the exhaust gas passing through the exhaust pipe.Type: GrantFiled: November 30, 2011Date of Patent: November 11, 2014Assignees: Hyundai Motor Company, Kia Mototrs CorporationInventor: Jin Ha Lee
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Patent number: 8881510Abstract: A control apparatus for an internal combustion engine detects an amount of particulate matter contained in an exhaust gas in an exhaust passage, according to an electrical property across electrodes of a particulate matter sensor disposed in the exhaust passage of the internal combustion engine. The term “electrical property” here refers to a property that changes with the amount of particulate matter deposited, for example, a current value of when a predetermined voltage is applied. After the internal combustion engine is started and detection of the amount of the particulate matter is completed, an element section of the particulate matter sensor is set to a predetermined temperature range. The particulate matter deposited on the element section is thereby burned and removed. The control apparatus maintains the element section in the predetermined temperature range after burning and removing the particulate matter until the internal combustion engine stops.Type: GrantFiled: March 15, 2011Date of Patent: November 11, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Keiichiro Aoki, Hiroki Nishijima
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Patent number: 8881505Abstract: According to one embodiment, an apparatus includes an electronic controller (15) for an internal combustion engine (12) of a motor vehicle. The electronic controller includes a location detection module (32) configured to identify a location of the motor vehicle by a global positioning system (GPS) device (18). Also, the electronic controller includes a driving condition prediction module (34) configured to determine a direction of travel and access geographic information data for a path to be traveled by the motor vehicle. The electronic controller also has a simulation module (36) configured to simulate engine performance including effects from parasitic loads. Still further, the electronic controller includes a parasitic load control module (38) configured to adjust the timing for one or more of a regeneration process for an exhaust filter and at least one other parasitic load in order to maintain engine performance at or above a predetermined threshold.Type: GrantFiled: August 13, 2010Date of Patent: November 11, 2014Assignee: Cummins IP, Inc.Inventor: Timothy R. Frazier
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Publication number: 20140325964Abstract: A system and method for delivering a reductant into an engine exhaust stream for use in the reduction of NOx is disclosed. The system includes a cartridge having an interior space for storing the reductant containing material, a fluid supply line fluidly connected to the cartridge for receiving the reductant, a pressure boosting device for boosting the flow of reductant, a flow management device, and, an injector for injecting the reductant into an after-treatment system for combining with the exhaust stream. The reductant may include ammonia. Use of the pressure boosting device increases the reductant pressure into the aftertreatment system, providing for a reduction in the time to inject the reductant into the exhaust stream, while improving the distribution of reductant into the exhaust stream.Type: ApplicationFiled: January 18, 2012Publication date: November 6, 2014Applicant: International Engine Intellectual Property Company LLCInventors: Ryan Andrew Wacker, Gregory A. Griffin
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Patent number: 8875502Abstract: An SCR exhaust gas aftertreatment device in which a urea-water solution is injected into an exhaust gas line is provided. At least one component of the device (e.g., a filter element) lies in an area of an internal space, and is bounded by an elastomer membrane that is embedded in a frost equalization foam. This prevents freezing damage even over a very long period of time and a large number of freezing cycles.Type: GrantFiled: December 12, 2011Date of Patent: November 4, 2014Assignee: Cummins Ltd.Inventors: Tobias Fuchs, Andreas Lannig, Ralf Rohrmueller, Sebastian Weidner, Friedrich Zapf
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Patent number: 8875504Abstract: A mixing device includes: a cylindrical portion having a blade provided inside thereof for mixing exhaust gas that flows inside of an exhaust pipe of an internal combustion engine, with an additive sprayed into the exhaust pipe by an adding valve; a flange having an insertion hole, into which the cylindrical portion is inserted, and extending outward in a radial direction of the cylindrical portion from an outer peripheral surface of the cylindrical portion; and a plurality of supporting portions that are provided on the flange and that support the cylindrical portion, wherein each of the supporting portions includes an extending piece that extends in a circumferential direction of the cylindrical portion from a base end portion connected to the flange.Type: GrantFiled: February 5, 2013Date of Patent: November 4, 2014Assignees: Toyota Jidosha Kabushiki Kaisha, Kabushiki Kaisha Toyota JidoshokkiInventors: Tomihisa Tsuchiya, Shoichi Maeda
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Patent number: 8875493Abstract: A reactant delivery system for engine exhaust gas treatment may include a tank in which a reactant is received, a pumping device, a pressure relief device, and a reactant distribution device. The pumping device may have an inlet disposed within the interior of the tank to receive the reactant, and an outlet through which the reactant is discharged. The pressure relief device may have an inlet in fluid communication with the outlet of the pumping device, a primary outlet to discharge the reactant under pressure to a downstream location, and a bypass outlet through which at least some of the reactant discharged from the pumping device is selectively discharged. And the reactant distribution device may be in fluid communication with the bypass outlet of the pressure relief device and have a plurality of outlets to distribute the reactant to at least two different locations within the tank.Type: GrantFiled: December 20, 2012Date of Patent: November 4, 2014Assignee: TI Group Automotive Systems, L.L.C.Inventors: Thaddeus A. Chmielewski, Antonio J. DaSilva, David H. Ford, Eric J. Grant, Peter P. Kuperus, Glenn A. Moss, Joseph M. Ross
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Patent number: 8875491Abstract: An exhaust gas aftertreatment system and method are provided. The system comprises a controller, a pump, and a volume quantity dispensing unit. The volume quantity dispensing unit comprises a pressure transducer comprising an electric pressure sensor, at least one fine atomizing nozzle for apportioning the aqueous solution directly into an exhaust gas flow, and at least one means for changing a pressure value. The means changes the pressure value in such a way that a pressure output signal from the pressure transducer to the controller is modified from an actual pressure value sensed by the pressure sensor. A first signal provided by the controller to the pump and a second signal provided by the controller to the volume quantity dispensing unit are adapted based on the output signal from the pressure transducer and a further signal indicative of an operating state of the internal combustion engine.Type: GrantFiled: August 17, 2012Date of Patent: November 4, 2014Assignee: Cummins Ltd.Inventors: Friedrich Zapf, Thorsten Pelz, Heico Stegmann
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Patent number: 8875490Abstract: A method includes determining a current mid-bed NH3 amount by operating an NH3 sensor positioned at a mid-bed location for an engine aftertreatment system having two SCR catalyst beds. The method further includes operating a NOx sensor positioned at the mid-bed location, and interpreting a current mid-bed ammonia to NOx ratio (ANR) and a current mid-bed NOx in response to the mid-bed NH3 amount and the operating the NOx sensor. The method further includes correcting an output value of the NOx sensor for cross-sensitivity to NH3. The method includes determining a mid-bed ANR constraint, determining a feedforward mid-bed NOx target, and providing a reductant injector command in response to the current mid-bed ANR, the current mid-bed NOx, the ANR constraint, and the feedforward mid-bed NOx target.Type: GrantFiled: March 19, 2012Date of Patent: November 4, 2014Assignee: Cummins Inc.Inventors: Mert Geveci, Andrew Osburn
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Patent number: 8875499Abstract: A urea solution reformer and an exhaust gas purifier is configured to heat a carrier gas supplied from a carrier gas source by a carrier gas heating unit, to inject the carrier gas heated by the carrier gas heating unit from a carrier gas injecting nozzle, and to cause a urea solution to be supplied by a first urea solution supply nozzle to a tip end of the carrier gas injecting nozzle so that the urea solution is atomized by the carrier gas injected from the carrier gas injecting nozzle. Provided to face toward the carrier gas injecting nozzle is a catalyst unit for decomposing the atomized urea solution to reform it into an ammonia gas. An ammonia gas supply nozzle is attached to an exhaust pipe of an engine so as to supply the ammonia gas discharged from an outlet of the catalyst unit into the exhaust pipe.Type: GrantFiled: March 14, 2012Date of Patent: November 4, 2014Assignees: Hino Motors Ltd., HKT CorporationInventors: Yoshihiro Kawada, Shinya Sato, Mitsuru Hosoya, Kazunori Takahashi, Hiroshi Inoue
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Patent number: 8875495Abstract: A tank assembly includes a tank defining a chamber that is configured to store a selectively variable volume of liquid. A positive temperature coefficient heater is disposed within the chamber. A source of electrical energy is in selective electrical communication with the heater and is configured to transfer electrical current to the heater. A controller is operatively connected to the heater and is configured to monitor the amount of electrical current to the heater. The controller is programmed to determine the volume of liquid in the chamber based on the amount of current transferred to the heater.Type: GrantFiled: August 6, 2010Date of Patent: November 4, 2014Assignee: GM Global Technology Operations LLCInventor: James M. Perrin
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Patent number: 8875494Abstract: A system for filtering and oxidizing particulate matter produced by a gasoline direct injection engine is disclosed. In one embodiment, engine cylinder air-fuel is adjusted to allow soot to oxidize at an upstream particulate filter while exhaust gases are efficiently processed in a downstream catalyst.Type: GrantFiled: December 15, 2009Date of Patent: November 4, 2014Assignee: Ford Global Technologies, LLCInventors: Carolyn Parks Hubbard, Robert Walter McCabe, Eva Thanasiu, Jeffrey Scott Hepburn, Helmut Hans Ruhland, Moritz Klaus Springer, Thomas Lorenz, Georg Louven, David Karl Bidner
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Patent number: 8875489Abstract: A method for controlling emissions from an engine includes reducing trapped nitrogen oxides to ammonia on an LNT catalyst while concurrently oxidizing soot accumulated on the LNT catalyst, and, flowing the ammonia so formed to an SCR catalyst.Type: GrantFiled: July 2, 2012Date of Patent: November 4, 2014Assignee: Ford Global Technologies, LLCInventors: Karen Marie Adams, Yisun Cheng, Giovanni Cavataio
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Patent number: 8875496Abstract: A regeneration control system for an exhaust filter in an internal combustion engine system includes a first sensing mechanism for monitoring an exhaust flow resistance of the exhaust filter, and a second sensing mechanism for monitoring an attenuation of electromagnetic energy transmitted through the exhaust filter. The regeneration control system further includes an electronic controller coupled with the sensing mechanisms and configured to output a filter regeneration command responsive to an amount of particulate matter trapped within the exhaust filter. The electronic controller is further configured to weight data from the first and second sensing mechanisms in determining the amount of particulate matter. Weighting of the data may be responsive to an operating state of the internal combustion engine system. Related methodology is also disclosed.Type: GrantFiled: June 29, 2011Date of Patent: November 4, 2014Assignee: Caterpillar Inc.Inventors: Rajesh N. Nair, Michael A. Snopko
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Patent number: 8875498Abstract: A pump system that includes a pump, an injector and a regulator with a calculation unit. The regulator controls the pump to pump a liquid through a hose to the injector which opens and closes in response to an injector control signal, the time for an opening and closing cycle being called injector cycle and designated Ts, and the injector's open period being designated ?. The injector has a pressure sensor to measure the pressure of the liquid in the injector and to deliver to the calculation unit a pressure sensor signal representing the pressure amplitude in the injector. The calculation unit calculates the hose's rigidity B as a function of measured pressured amplitudes A in the injector, the injector cycle Ts and the injector's open period ?, and the regulator determines the basis of B the control signal to the pump.Type: GrantFiled: April 1, 2011Date of Patent: November 4, 2014Assignee: Scania CV ABInventors: Ottmar Raeymaeckers, Anders Larsson, Eva Geijer, Leif Lundin
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Patent number: 8875497Abstract: An exhaust purification system for an internal combustion engine is provided that can steadily maintain a NOx purification rate of a selective reduction catalyst to be high without allowing the fuel economy or marketability to deteriorate. The exhaust purification system includes a NO2—NOx ratio adjustment mechanism that causes a NO2—NOx ratio to change; and a NO2—NOx ratio perturbation controller that executes NO2—NOx ratio perturbation control so that a NO2 balance of the selective reduction catalyst in a predetermined time period, with NO2 adsorption being positive and NO2 release being negative, is 0. Herein, NO2—NOx ratio perturbation control is defined as control that alternately executes NO2 increase control to cause the NO2—NOx ratio to be greater than a reference value near 0.5, and NO2 decrease control to cause the NO2—NOx ratio to be less than the reference value.Type: GrantFiled: April 4, 2012Date of Patent: November 4, 2014Assignee: Honda Motor Co., Ltd.Inventors: Hideki Matsunaga, Yuji Yasui, Eiji Hashimoto, Hisao Haga, Naohiro Sato, Masafumi Sakota
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Patent number: 8869514Abstract: A method for controlled dosing of a gas with fluctuating supply pressure (PSupply). Dosing of the gas through a valve (6) is performed while a valve (5) is closed, and the decrease in control-volume pressure (PCV) is recorded. The control-volume pressure (PCV) is raised by closing dosing valve (6) and opening the valve (5). The amount of the dosed gas is calculated based on the known volume (VCV) of the control volume (4) and at least one of the change in control-volume pressure (PCV) and control-volume temperature (TCV) in the period where valve (5) is closed. The amount of dosed gas is compared with a target or set-point to adjust or regulate the subsequent dosing period or dosing event.Type: GrantFiled: November 3, 2010Date of Patent: October 28, 2014Assignee: Amminex Emissions Technology A/SInventors: Jan Pietraszek, Tue Johannessen
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Patent number: 8869513Abstract: An exhaust diagnostic control system comprises a test enabling module, an exhaust gas temperature management module, and an exhaust diagnostic control system. The test enabling module is configured for executing a process for depleting a reductant load and subsequently establishing a known concentration of reductant on an after-treatment component following an occurrence of one or more trigger events. The exhaust gas temperature management module is configured for selectively adjusting a temperature of the after-treatment component to a predetermined temperature range using intrusive exhaust gas temperature management. The component management module is configured for executing a NOx reduction efficiency test following completion of the process for depleting a reductant load and subsequently establishing a known concentration of reductant on the after-treatment component. The NOx reduction efficiency test comprises determining a NOx reduction efficiency associated with the after-treatment component.Type: GrantFiled: April 19, 2012Date of Patent: October 28, 2014Assignee: GM Global Technology Operations LLCInventors: Stephen Paul Levijoki, Justin A. Shetney
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Patent number: 8869516Abstract: A machine includes an internal combustion engine disposed within an engine compartment and supported on a machine frame. An exhaust stack has an inlet fluidly connected to an exhaust manifold of the internal combustion engine and an outlet in fluid communication with ambient air. A diesel particulate filter is disposed along the exhaust stack. A cooling package includes at least one heat exchanger and a blower fan. The blower fan is configured to blow cooling air from the engine compartment sequentially through the at least one heat exchanger and an outlet of the cooling package. Exhaust gas exiting the exhaust stack outlet is mixed with the cooling air exiting the cooling package outlet in a high temperature zone surrounding the exhaust stack outlet to form a fluid mixture, and a temperature of the fluid mixture at a perimeter of the high temperature zone is below 200 degrees Celsius.Type: GrantFiled: November 3, 2010Date of Patent: October 28, 2014Assignee: Caterpillar SARLInventors: Sage Frederick Smith, John Edward Preble, Jr., Terry Marlin Smith, Jr.
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Patent number: 8869515Abstract: The invention relates to a method for controlling a system for treating NOx in an exhaust line of an internal combustion engine, said system comprising means for introducing a reducing agent into the exhaust line upstream of an NOx reduction catalyst. The invention is characterized in that it consists in estimating the efficiency of the treatment in relation to a maximum conversion potential obtained if the ratio between the quantity of injected reducer and the quantity of NOx in the gas complies with a given set value and if the mass of reducing agent stored in the catalyst complies with a given storage set value.Type: GrantFiled: October 18, 2010Date of Patent: October 28, 2014Assignee: Peugeot Citroen Automobiles SAInventors: Christophe Charial, Clement Grise
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Publication number: 20140311123Abstract: An exhaust gas treatment system for an internal combustion engine is provided. The system includes an exhaust gas conduit extending from the engine configured to receive an exhaust gas stream from the engine, a first injector in fluid communication with the exhaust gas conduit configured to selectively inject fuel containing unburned hydrocarbon (HC) into the exhaust gas conduit and an oxidation catalyst disposed in the exhaust gas conduit downstream from the first injector. The system further includes a hydrocarbon selective catalyst reduction (HCSCR) catalyst applied on the oxidation catalyst, a heating device positioned at an upstream side of the oxidation catalyst configured to heat the oxidation catalyst and HCSCR catalyst, a selective catalyst reduction (SCR) device disposed within the exhaust gas conduit downstream from the oxidation catalyst, and a particulate filter positioned downstream from the selective catalyst reduction device.Type: ApplicationFiled: April 19, 2013Publication date: October 23, 2014Applicant: GM Global Technology Operations LLCInventors: Eugene V. Gonze, Charles Gough
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Publication number: 20140311122Abstract: A particulate filter assembly, an exhaust gas treatment system having a particulate filter assembly, and a control method for flow controlled zoned regeneration of the particulate filter assembly are provided. The particulate filter assembly is configured to receive an exhaust gas stream from an internal combustion engine and includes an inlet end configured to receive the exhaust gas stream, a filter configured to remove particulates from the exhaust gas stream, a heating device positioned upstream from the filter having a plurality of zones, each zone of the plurality of zones independently operable to heat a corresponding region of the filter and an exhaust flow valve positioned downstream from the filter configured to selectively restrict flow of the exhaust gas stream through the filter.Type: ApplicationFiled: April 17, 2013Publication date: October 23, 2014Applicant: GM Global Technology Operations LLCInventors: Eugene V. Gonze, Robert D. Straub, Michael J. Paratore, JR.
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Patent number: 8863502Abstract: The present invention relates to a metering module (15) for a liquid reducing agent, in particular a urea-water solution, for mixing the reducing agent with a gas, in particular air, for further introduction into an exhaust pipe (5) of an internal combustion engine (1). The metering module (15) comprises a metering valve (31) having a conduit (33), a compressed air duct (49) and a mixing chamber (35). An outlet opening of the conduit (33) for the reducing agent is arranged in the mixing chamber (35) at a distance from the mid-axis of the metering module (36).Type: GrantFiled: July 29, 2010Date of Patent: October 21, 2014Assignee: Robert Bosch GmbHInventors: Bernhard Feistritzer, Markus Foetschl, Werner Pape
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Patent number: 8863499Abstract: An exhaust gas treatment system for an internal combustion engine is provided having an exhaust gas conduit, a diesel exhaust fluid (“DEF”) source, a selective catalytic reduction (“SCR”) device, a NOx sensor, and a control module. The DEF source supplies a DEF having a quality factor. The NOx sensor is in fluid communication with the exhaust gas conduit. The NOx sensor is located downstream of the SCR device and is configured for detecting a NOx concentration value. The control module is in communication with the DEF source and the NOx sensor. The control module stores a diagnostic adaptation factor and an expected NOx value. The control module includes a dosing module for determining a controls adaptation factor that is based on a deviation between the NOx concentration value and the expected NOx value. The diagnostic adaptation factor is selectively updated with the controls adaptation factor.Type: GrantFiled: May 10, 2012Date of Patent: October 21, 2014Assignee: GM Global Technology Operations LLCInventors: Janean E. Kowalkowski, Robert J. Sutschek, John Coppola
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Patent number: 8868266Abstract: Methods and systems for distributing engine output among rail vehicles of a consist are disclosed. One method comprises, adjusting redistribution of engine output from at least a first engine to at least a second engine based on a particulate filter regeneration of a filter coupled to the second engine.Type: GrantFiled: August 19, 2011Date of Patent: October 21, 2014Assignee: General Electric CompanyInventors: Shawn Michael Gallagher, Michael Easter, Eric David Peters
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Patent number: 8863497Abstract: A controlling method for adjusting concentrations of, for example, individual cylinder's exhaust gas constituents to provide engine functions such as catalytic converter diagnosis, increased overall catalytic converter efficiency and rapid catalyst heating, before and/or after initiating closed loop fuel injection control, using a selected temperature sensor location within a low thermal mass catalytic converter design.Type: GrantFiled: February 14, 2011Date of Patent: October 21, 2014Inventor: Joseph E. Legare
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Patent number: 8863500Abstract: A method for operating an electromagnetically actuated metering valve, which is loaded with a pulse-width modulated metering signal, which stipulates the dosage of a reagent or a precursor of the reagent introduced into the exhaust gas region of an internal combustion engine and an apparatus for implementing the method are proposed. A clock signal is provided, whose cycle duration is smaller than the cycle duration of the pulse-width modulated metering signal. The cycle duration of the pulse-width modulated metering signal is set as a function of a metering request signal to multiples of the cycle durations of the clock signal. The procedural approach according to the invention allows for a rapid adaptation of the dosage to the metering demands.Type: GrantFiled: September 17, 2008Date of Patent: October 21, 2014Assignee: Robert Bosch GmbHInventors: Jens Reinhold, Marc Chaineux
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Patent number: 8863503Abstract: An exhaust purification system is provided that can appropriately grasp the NOx concentration or NH3 concentration on a downstream side of a selective reduction catalyst. A separation filter of the system models a downstream NOx estimated value (NOx_DW_hat) of the catalyst with a value obtained by multiplying a coefficient (Kscr) by an output (NOx_UP) of an upstream-side NOx sensor. The separation filter includes transient extraction filters that block a stationary component and allow a frequency band corresponding to an increase-decrease request of drive power from the driver to pass from the downstream NOx sensor output (Ynox) and upstream NOx sensor output (NOx_UP), and calculate filter values (Ynox_f, NOx_UP_f) of each; and an identifier that identifies the coefficient (Kscr) so that error (eid) between the filter value (Ynox_f) and a value (NOx_DW_hat_f) obtained by multiplying the purification coefficient (Kscr) by the filter value (NOx_UP_f) becomes a minimum.Type: GrantFiled: April 2, 2013Date of Patent: October 21, 2014Assignee: Honda Motor Co., Ltd.Inventor: Yuji Yasui
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Patent number: 8863501Abstract: The invention relates to an injection system for injecting a fluid into a filter provided in an exhaust system, comprising at least two modules and at least one pressure compensation volume (44, 46, 48, 54, 56, 58), which is designed for feeding fluid to at least one of the modules and hydraulically connects at least two of the modules. Each module comprises at least one injection unit (40, 50, 60) designed for injecting fluid into the exhaust system.Type: GrantFiled: April 26, 2010Date of Patent: October 21, 2014Assignee: Robert Bosch GmbHInventors: Volker Reusing, Chris Weirauch, Stefan Stein
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Patent number: 8863496Abstract: A particulate matter control system includes: an electrode that is provided in an exhaust pipe of an internal combustion engine; a power supply that is connected to the electrode and that applies voltage; a particle number detecting unit that detects the particle number of particulate matter on a downstream side of the electrode; a calculation unit that calculates a reduction rate of the particle number at the time when voltage is applied on the basis of the particle number detected by the particle number detecting unit at the time when voltage is applied and the particle number detected by the particle number detecting unit at the time when no voltage is applied; and a determination unit that determines that there is a failure when the reduction rate of the particle number, calculated by the calculation unit, is smaller than a threshold.Type: GrantFiled: April 4, 2012Date of Patent: October 21, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shinichi Mitani, Hiroshi Nomura, Eiji Murase
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Publication number: 20140305100Abstract: In a method for preventing clogging of a urea injection nozzle in an after-run operation of a selective catalytic reduction (SCR) system which supplies urea stored in a urea tank through a supply module, a urea injection nozzle and a urea line connecting the supply module and the urea injection nozzle, the method may include an emptying step where the urea is withdrawn into the urea tank by creating negative pressure in the supply module and a pressure equilibrium step where the pressure in the supply module is recovered by stopping creation of negative pressure in the supply module, wherein in the pressure equilibrium step, whether to forcibly inject the urea is controlled on the basis of pressure after a predetermined time has passed since the pressure equilibrium step began.Type: ApplicationFiled: December 26, 2013Publication date: October 16, 2014Applicants: Kia Motors Corporation, Hyundai Motor CompanyInventor: Jaeseok SHIN
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Publication number: 20140305104Abstract: The invention relates to a device for cooling a metering module (10), in particular a module for metering an operating agent/auxiliary agent such as a reducing agent into the exhaust gas system of an internal combustion engine. A cooling device comprising a cooling member (17, 20, 24, 28, 29) through which a cooling liquid flows is associated with the metering module (10). The cooling member (17, 20, 24, 28, 29) acts as a housing (12) for the metering module (10). A first group of parts (17, 20, 28) forms an air gap insulation (38; 54, 56, 58) on an electric contact (16, 36), while cooling fluid flows through a second group of parts (28, 29, 40).Type: ApplicationFiled: November 19, 2012Publication date: October 16, 2014Inventors: Achim Knittel, Stephan Pohl, Martin Kiontke
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Patent number: 8857160Abstract: The invention relates to a dosing system (10) for introducing a reducing agent (18), especially urea or an aqueous urea solution, into an exhaust gas system of an internal combustion engine. The dosing system (10) comprises a reservoir (12, 14) for accommodating a stock in the reducing agent (18), a delivery unit (32), a level sensor (50) and a dosing module (38). The reservoir (40) is a standard reservoir integrated into a vehicle-specific component (60), especially a fuel tank (68).Type: GrantFiled: November 16, 2009Date of Patent: October 14, 2014Assignee: Robert Bosch GmbHInventor: Rainer Haeberer
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Patent number: 8857161Abstract: A detection unit that is arranged in an exhaust passage of an internal combustion engine configured to detect a state of the exhaust gas, addition unit configured to add the additive agent into the exhaust passage, a catalyst that is arranged at the downstream side of the detection unit and the addition unit so as to receive a supply of the additive agent from the addition unit, determination unit configured to determine whether detection accuracy of the detection unit drops due to the additive agent to be added from the addition unit, and stop unit configured to stop detection of the state of the exhaust gas by the detection unit in cases where it is determined by the determination unit that the detection accuracy of the detection unit drops.Type: GrantFiled: September 16, 2009Date of Patent: October 14, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventor: Kazuhiro Itoh
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Publication number: 20140298775Abstract: A regeneration control system for an exhaust filter in an internal combustion engine system includes a first sensing mechanism for monitoring an exhaust flow resistance of the exhaust filter, and a second sensing mechanism for monitoring an attenuation of electromagnetic energy transmitted through the exhaust filter. The regeneration control system further includes an electronic controller coupled with the sensing mechanisms and configured to output a filter regeneration command responsive to an amount of particulate matter trapped within the exhaust filter. The electronic controller is further configured to weight data from the first and second sensing mechanisms in determining the amount of particulate matter. Weighting of the data may be responsive to an operating state of the internal combustion engine system. Related methodology is also disclosed.Type: ApplicationFiled: June 19, 2014Publication date: October 9, 2014Inventors: Michael A. Snopko, Rajesh N. Nair
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Patent number: 8850800Abstract: An exhaust treatment system for machine is disclosed that includes a burner body having an inlet for receiving a flow of exhaust, an outlet for the exhaust flow to exit, an opening and a receiving mount disposed around the opening. A fuel injector head is mounted over the opening in any one of a plurality of angular positions relative to the body. The burner body includes a plurality of mounting pads extending at least partially and circumferentially around the burner body for coupling a support bracket to the burner body in any one of a plurality of positions relative to the burner body. The support bracket may be used to couple the burner to a fixture device such as a cradle for supporting other exhaust treatment system components.Type: GrantFiled: October 17, 2012Date of Patent: October 7, 2014Assignee: Caterpillar Inc.Inventors: Eric J. Charles, Jack A. Merchant, David L. Demeny, Govind S. Madaiah, Naseer A. Niaz, Eric J. Blankenship, Thomas R. McClure
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Patent number: 8850797Abstract: System for storing an internal combustion engine exhaust gas liquid additive, the system comprising a tank for storing the additive and an “immersed” baseplate positioned through an opening made in the bottom wall of the tank, the baseplate comprising at least one orifice through which a system for injecting the additive into the exhaust gases can be fed, and also incorporating at least one other active component of the storage system and/or of the injection system.Type: GrantFiled: June 7, 2007Date of Patent: October 7, 2014Assignee: Inergy Automotive Systems Research S.A.Inventors: Francois Dougnier, Joel Op De Beeck
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Patent number: 8850802Abstract: A system for NOx reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of NO to NO2, particulate filter, a source of reductant such as NH3 and an SCR catalyst. Considerable improvements in NOx conversion are observed.Type: GrantFiled: March 15, 2013Date of Patent: October 7, 2014Assignees: Daimler AG, HJS Emission Technology GmbH & Co. KG, Johnson Matthey Public Ltd. Co.Inventors: Anders Andreasson, Guy Richard Chandler, Claus Fnednch Goersman, James Patrick Warren, Georg Huethwohl
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Patent number: 8850801Abstract: A catalytic converter and muffler including a housing having an inlet disposed between a first end and a second end of the housing to introduce exhaust gases into an inlet chamber. A plurality of first exhaust treatment banks disposed between the inlet and the first end of the housing to allow the exhaust gases flow towards the first end from the inlet chamber into an end chamber. A mixing tube to direct the exhaust gases towards the second end from the end chamber into a flow distributor and a plurality of second exhaust aftertreatment banks and flow into an outlet chamber. At least one resonator chamber defined within the housing to attenuate noise in the exhaust gases.Type: GrantFiled: January 25, 2013Date of Patent: October 7, 2014Assignee: Caterpillar Inc.Inventors: Mirza P. Baig, Kevin J. Weiss, Raymond U. Isada, Stephan D. Roozenboom
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Patent number: 8850799Abstract: Based on a fuel supplying amount in accordance with an engine operating condition, a discharge amount of a predetermined fuel component contained in exhaust gas to be discharge per unit time is estimated, and integrated by an accumulation amount of the fuel component accumulated in an exhaust purification element. Furthermore, according to an exhaust gas temperature that flows into the element, an amount of the fuel component to be removed from the element per unit time is estimated, and the amount is subtracted from the accumulation amount. When the accumulation amount is equal to or greater than a predetermined value, a determination is made that a timing to forcefully remove the fuel component accumulated in the element has arrived. Then, an alarming lamp is lightened, and a forceful removing processing is performed by raising a temperature of the exhaust gas above a temperature at which the fuel component is removed.Type: GrantFiled: October 5, 2012Date of Patent: October 7, 2014Assignee: UD Trucks CorporationInventors: Masakazu Yano, Tomofumi Nakashima, Tomoyuki Takeda, Takafumi Amano
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Patent number: 8850803Abstract: A system includes a main engine operating on gaseous fuel from a tank. An auxiliary engine operates using gaseous fuel vented from the tank. A first exhaust passage receives a first stream of exhaust gas from the main engine. A second exhaust passage receives exhaust gas from the auxiliary engine, which passes through an ammonia-producing catalyst. A third exhaust passage is fluidly connected to the first and second exhaust passages and routes exhaust gas through a NOx reducing catalyst. The system operates such that a mass flow of ammonia generated by the ammonia-producing catalyst substantially matches a total mass flow of NOx gas in the third exhaust passage that is treated within the ammonia-producing catalyst.Type: GrantFiled: December 10, 2012Date of Patent: October 7, 2014Assignee: Caterpillar Inc.Inventor: Cory A. Brown
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Patent number: 8850798Abstract: A regeneration system for a filter that filters exhaust gas of an engine includes a soot loading determination module that determines soot accumulation in the filter. A regeneration control module receives the determined soot accumulation from the soot loading determination module, compares the soot accumulation to a first soot accumulation threshold, and selectively increases oxidation levels in the exhaust gas in response to the comparison between the soot accumulation and the first soot accumulation threshold to initiate regeneration in the filter.Type: GrantFiled: May 11, 2011Date of Patent: October 7, 2014Inventors: David B. Brown, Stuart R. Smith
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Publication number: 20140290224Abstract: A wheel loader includes an engine, a selective catalyst reduction device, and an injection device accommodated in an engine room defined by a vehicle body cover. The wheel loader further includes a partition plate, a reducing agent tank, a reducing agent pump, and a reducing agent pipe. The selective catalyst reduction device is for treating exhaust gas from the engine. The injection device is for injecting reducing agent into the exhaust gas fed from the engine toward the selective catalyst reduction device. The partition plate is disposed between the selective catalyst reduction device and the vehicle body cover. The reducing agent tank stores reducing agent. The reducing agent pump supplies the reducing agent from the reducing agent tank to the injection device. The reducing agent pipe connects the reducing agent pump and the injection device, and extends between the vehicle body cover and the partition plate inside the engine room.Type: ApplicationFiled: March 26, 2013Publication date: October 2, 2014Inventor: Shirou Kanamori
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Patent number: 8844269Abstract: There is disclosed a method and system for pressurizing a reductant solution from a reductant storage device and superheating the pressurized reductant solution. The superheated pressurized reductant solution at least partially decomposes in the heat exchanger and/or a decomposition chamber before it is released into an exhaust system. The at least partially decomposed reductant solution is delivered to the exhaust system upstream of the SCR catalyst.Type: GrantFiled: March 16, 2012Date of Patent: September 30, 2014Assignee: Cummins Inc.Inventors: Cary Henry, Aleksey Yezerets, Neal Currier, Krishna Kamasamudram, Andrew Osburn
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Patent number: 8844268Abstract: It is determined quickly whether there is a shortage in reducing agent supplied to an NOx selective reduction catalyst. After it is determined that a quantity of reducing agent equal to or larger than a predetermined quantity is absorbed in the NOx selective reduction catalyst on the assumption that there is no abnormality in reducing agent supply unit, the supply of a quantity of reducing agent needed to reduce a quantity of NOx flowing into the NOx selective reduction catalyst is started. A determination of an abnormality in the reducing agent supply unit is made based on the NOx removal rate after the lapse of a predetermined period of time since the start of the supply of reducing agent. The NOx removal rate becomes lower when there is an abnormality in the reducing agent supply unit.Type: GrantFiled: January 19, 2009Date of Patent: September 30, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Daisuke Shibata, Satoshi Endo, Taiga Hagimoto, Hiroshi Sawada
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Patent number: 8844270Abstract: The present disclosure relates to a diesel exhaust treatment device including a catalytic converter positioned upstream from a diesel particulate filter. An electric heater is positioned between the catalytic converter and the diesel particulate filter. A shore station can be used to provide power and combustion air to the diesel exhaust treatment device during regeneration of the diesel particulate filter.Type: GrantFiled: January 19, 2010Date of Patent: September 30, 2014Assignee: Donaldson Company, Inc.Inventors: John T. Herman, Mary J. Lorenzen, Wenzhong Zhang, Joanne Wagner
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Patent number: 8844275Abstract: An exhaust-gas aftertreatment system, having a catalytic converter and/or particle filter which are/is assigned a burner arranged upstream in an exhaust line, to which burner fuel can be supplied via a fuel nozzle device and also combustion air can be supplied, and wherein the combustion air and the fuel emerging from the fuel nozzle device are mixed in a downstream air swirl vaporizer nozzle. An exhaust-gas aftertreatment system having a burner which operates reliably with a compact design and in which the supplied energy for operating the burner is reduced in relation to known systems. The fuel nozzle device has a nozzle body which extends at least from an inlet to an outlet and which has arranged therein a support body, which nozzle body and support body together produce a film-forming fuel supply duct.Type: GrantFiled: May 8, 2009Date of Patent: September 30, 2014Assignee: Deutz AktiengesellschaftInventors: Rolf Miebach, Peter Broll, Stephan Schraml
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Patent number: 8844274Abstract: A diesel engine exhaust treatment system and method is provided which utilizes a diesel particulate filter positioned in the exhaust gas stream of a vehicle which includes an SCR catalyst, an ammonia oxidation catalyst, and/or a diesel oxidation catalyst. The system is capable of performing multiple functions including converting NOx to N2, converting HC and CO to H2O and CO2, trapping particulates, and minimizing ammonia emissions. The system is more compact and efficient than prior systems utilizing separate catalyst units, and minimizes backpressure while maximizing catalyst performance.Type: GrantFiled: January 9, 2009Date of Patent: September 30, 2014Assignee: Ford Global Technologies, LLCInventors: Christine Kay Lambert, Yinyan Huang, Douglas A. Dobson, Harendra S. Gandhi