Anti-pollution Patents (Class 60/274)
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Patent number: 11441511Abstract: An engine controller controlling an engine including an occlusion reduction catalyst in an exhaust device includes a fuel injection controller that controls a fuel injection amount of an injector, an EGR controller that controls an EGR device, a sulfur purge determiner that determines whether sulfur purging of the catalyst is to be performed, and a sulfur purge controller that executes sulfur purge control if the sulfur purging is performed. The sulfur purge control involves performing a fuel injection to achieve a rich air-fuel ratio at an inlet of the catalyst and prohibiting the exhaust-gas introduction. The sulfur purge controller executes sulfur-purge standby control when a sulfur-purge standby condition is satisfied, and resumes the sulfur purge control when the condition becomes non-satisfied after starting the sulfur-purge standby control.Type: GrantFiled: October 13, 2021Date of Patent: September 13, 2022Assignee: SUBARU CORPORATIONInventors: Hiroki Kasuya, Shotaro Harimoto, Masaaki Watanabe
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Patent number: 11441460Abstract: An exhaust system for an internal combustion engine includes an exhaust pipe, and a vane mixer attached to an upstream pipe end of the exhaust pipe and including a fluid injector mount, and a fluid injection side port in the injector mount and fluidly connected to an exhaust passage in the vane mixer. The vane mixer further includes a vane extending across the exhaust passage and dividing the exhaust passage into a major flow area and a minor flow area. The minor flow area is in overlapping angular alignment, circumferentially around a longitudinal exhaust passage axis, with the fluid injection side port.Type: GrantFiled: October 26, 2020Date of Patent: September 13, 2022Assignee: Caterpillar Inc.Inventors: Khaja Mohiuddin, Yong Yi, Tejashree Nanasaheb Shirke, Vikas Bhupendra Sheth
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Patent number: 11441466Abstract: A system for determining an exhaust flow rate of an exhaust gas produced by an engine comprises a first sensor configured to measure an amount of NOx gases in the exhaust gas. A controller is communicatively coupled to the first sensor. The controller is configured to receive a first sensor signal from the first sensor. The controller is also configured to receive a fuel rate signal corresponding to a rate of fuel consumption by the engine. The controller is configured to determine an air-fuel ratio from the first sensor signal and determine a fuel rate from the fuel rate signal. Furthermore, the controller is configured to determine the exhaust flow rate from the air-fuel ratio and the fuel rate.Type: GrantFiled: February 15, 2018Date of Patent: September 13, 2022Assignee: Cummins Emission Solutions Inc.Inventor: Tarek Elharis
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Patent number: 11435332Abstract: A method for reducing sensor noise in an automobile vehicle NOx sensor offset diagnostic includes: connecting an exhaust system to an engine of an automobile vehicle; sensing a condition of the exhaust system using at least one NOx sensor; identifying when the at least one NOx sensor is at a low noise condition; and running a diagnostic to identify conditions of the at least one NOx sensor. The method further includes selecting one of the low noise condition as the engine in an after-run condition or as the engine in an engine idle condition.Type: GrantFiled: September 25, 2020Date of Patent: September 6, 2022Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: David P. Quigley, Sarah Funk, Kevin J. McKay, Scott R. Zechiel, Ruggiero Chiariello
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Patent number: 11434186Abstract: Methods for producing alcohols by deriving carbon dioxide from air or another dilute source, and supplying water, which is converted to hydrogen and oxygen, with subsequent conversion of the carbon dioxide and hydrogen into alcohols is disclosed. The method includes, but is not limited to including, a direct air capture system carbon dioxide, a water electrolysis unit powered by electricity, a hydrogenation reactor to convert carbon dioxide and hydrogen gases into alcohols, and a distillation system to separate alcohols or a single constituent alcohol from other hydrogenation products. Optionally, these methods may include systems capture water from air, if water or hydrogen is not available on-site, and the distillation system may use propylene glycol as an extraction solvent. This process can be used for on-site production of feedstock alcohols such as ethanol at high purity, and many other applications.Type: GrantFiled: June 29, 2018Date of Patent: September 6, 2022Assignee: Air Company Holdings, Inc.Inventor: Stafford W. Sheehan
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Patent number: 11434800Abstract: Embodiments are directed towards controlling uncontrolled release of ammonia from an engine of a vehicle. An estimated status of the engine is determined prior to an event, such as an estimated load on the engine prior to the vehicle going up a hill. A predictive model of uncontrolled ammonia release is generated for the estimated status. At least one engine-related countermeasure is selected based on the predictive model. If the predictive model of uncontrolled ammonia release with the selected countermeasures satisfies a threshold condition, then the selected engine-related countermeasure is employed.Type: GrantFiled: January 4, 2021Date of Patent: September 6, 2022Assignee: PACCAR INCInventors: Jorge Rafael Lozada Ramirez, Carl Anders Hergart, Cynthia Chaffin Webb, Christopher S. Balton
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Patent number: 11428143Abstract: Methods comprising: arranging a binary lambda sensor and a second sensor downstream of a catalytic converter; when the engine is run for the first time, using an initial lambda setpoint for closed-loop control; measuring the NH3 value in the exhaust gas; simultaneously measuring the signal from the binary lambda sensor; if the NH3 value lies above a first threshold value, reducing the lambda setpoint value of the binary lambda signal until the NH3 value lies below the first threshold value or the binary sensor signal lies below a second threshold value; recording the corresponding binary sensor signal when the NH3 value passes the first threshold value, for binary sensor signal setpoint value adaptation, as Vbinary-left; and calculating the real lambda setpoint value.Type: GrantFiled: April 8, 2019Date of Patent: August 30, 2022Assignee: VITESCO TECHNOLOGIES GMBHInventor: Hong Zhang
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Patent number: 11421576Abstract: An exhaust gas system for an internal combustion engine of a single-track vehicle can be arranged on an exhaust gas outlet of a cylinder head. A first lambda probe close to the cylinder head is provided in the exhaust gas system and is arranged before an exhaust gas cleaning system in the flow direction of an exhaust gas. A second lambda probe is provided in the exhaust gas system after the exhaust gas cleaning system in the flow direction of the exhaust gas. The second lambda probe is arranged at a maximum distance away from the exhaust gas cleaning system equal to four times the diameter of the exhaust gas cleaning system. As a result of the design, the lambda probe is arranged in the non-visible region of the single-track vehicle, while simultaneously examining the quality of the exhaust gas cleaning.Type: GrantFiled: October 21, 2019Date of Patent: August 23, 2022Assignee: Bayerische Motoren Werke AktiengesellschaftInventors: Uli Bluemelhuber, Carina Hoefler
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Patent number: 11421573Abstract: A DEF system for use with an internal combustion engine, the DEF system including a primary flowpath extending between a first inlet and a first outlet, where the first inlet is open to and configured to receive exhaust gasses from the internal combustion engine. The DEF system also includes a secondary flowpath including a second inlet open to the primary flowpath downstream of the first inlet and upstream of the first outlet, a second outlet open to the primary flowpath downstream of the secondary inlet and upstream of the first outlet, and an injector assembly configured to inject DEF into the secondary flowpath.Type: GrantFiled: February 17, 2021Date of Patent: August 23, 2022Assignee: DEERE & COMPANYInventors: Shyan-Cherng Huang, Kiran Shekarappa
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Patent number: 11415482Abstract: A water intrusion cover for a sensor probe in an exhaust system is provided. The water intrusion cover includes a main body portion having a substantially cylindrical shape, an inlet opening, and an outlet opening. The inlet opening and outlet opening are formed in a sidewall of the main body portion and are fluidly coupled to form a continuous flow path defined by a surface that, in a cross-section perpendicular to an axis of the main body portion, curves from the inlet opening to the outlet opening. The water intrusion cover further includes a shoulder portion having a substantially cylindrical shape. The main body portion and the shoulder portion collectively define a central passage for the sensor probe.Type: GrantFiled: August 25, 2020Date of Patent: August 16, 2022Assignee: Cummins Emission Solutions Inc.Inventors: Advait Sunil Vaishampayan, Samantha Stang, Sachin Sharma, Srinivasan Balu, Tushar Ravindra Dhinge
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Patent number: 11391190Abstract: A dosing composition and method for treatment of reductant urea solutions utilizing organometallic catalyst precursors in combination with one or more surfactants to promote decomposition of relatively high molecular weight deposits which deposits may otherwise reduce selective catalytic reduction efficiency.Type: GrantFiled: March 20, 2020Date of Patent: July 19, 2022Assignee: SOUTHWEST RESEARCH INSTITUTEInventor: Ryan Christian Hartley
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Patent number: 11384677Abstract: A state estimation apparatus includes: a rate calculating configured to calculate, based on both a flow rate and an air-fuel ratio of exhaust gas flowing into an oxygen storage catalyst, a rate of change in an oxygen storage amount in the oxygen storage catalyst; a limit calculating unit configured to calculate a limit rate which is a limit value for the rate of change; and a storage-amount updating unit configured to update, based on the rate of change and the limit rate, an estimated value of the oxygen storage amount. Moreover, the storage-amount updating unit is further configured to: update, when the rate of change does not exceed the limit rate, the estimated value based on the rate of change; and update, when the rate of change exceeds the limit rate, the estimated value based on the limit rate.Type: GrantFiled: June 11, 2021Date of Patent: July 12, 2022Assignee: DENSO CORPORATIONInventors: Hiroshi Suzuki, Yasuhiro Kawakatsu
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Patent number: 11384674Abstract: A reuse evaluation system is a system that performs an evaluation to reuse a catalyst in a state where the catalyst that purifies an exhaust gas of an engine of a vehicle 1 is mounted on the vehicle. The reuse evaluation system includes a deterioration estimator that estimates a degree of deterioration of the catalyst based on an operating state of the vehicle, a reuse setting unit that sets a range of the degree of deterioration of the catalyst as a reuse range of the catalyst according to a usage of reuse of the catalyst, and a reuse determining unit that determines that the catalyst is reusable in the reuse usages when the degree of deterioration of the catalyst estimated by the deterioration estimator is within the reuse range set by the reuse setting unit.Type: GrantFiled: March 19, 2021Date of Patent: July 12, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tsuyoshi Okada, Masaru Kakinohana, Fukutaroh Mori, Shogo Shirakawa, Yuriko Takahashi, Masashi Nose
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Patent number: 11383693Abstract: A hybrid vehicle with an engine and a rotary machine each coupled to a drive wheel in a power transmittable manner, comprises: an electronic control device that makes the rotary machine output a starting-time compensation torque to compensate a drop in a drive torque caused in a starting process of the engine in addition to a running torque when the engine is started while the vehicle is in a running state in which the drive torque is generated by the rotary machine and the engine is in a stopped state. The electronic control device starts the engine such that a starting-time inertia torque that is generated according to starting of the engine and causes the drop in the drive torque is made smaller when a torque margin of the rotary machine which is applied to the starting-time compensation torque is relatively small than when the torque margin is relatively large.Type: GrantFiled: April 2, 2019Date of Patent: July 12, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Kitahata, Tooru Matsubara, Kazuyuki Shiiba, Koichi Okuda, Atsushi Tabata
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Patent number: 11376550Abstract: The present invention relates to a catalyst which comprises a carrier substrate of length L, which extends between a first end face a and a second end face b, and catalytically active material zones A, B and C of different composition, wherein—material zone A comprises palladium or palladium and platinum with a weight ratio of Pd:Pt>1, and cerium oxide, —material zone B comprises platinum or platinum and palladium with a weight ratio of Pt:Pd>1, and cerium oxide and/or cerium/zirconium mixed oxide, and—material zone C comprises platinum or platinum and palladium with a weight ratio of Pt:Pd>1, and a carrier oxide, and wherein—material zone B is arranged above material zone A, and—material zone C is arranged above material zone B, and, starting from the second end face b of the carrier substrate, extends over a length of up to 60% of the length L. The invention also relates to a catalyst arrangement containing said catalyst.Type: GrantFiled: August 22, 2019Date of Patent: July 5, 2022Assignee: UMICORE AG & CO. KGInventors: Anke Woerz, Ruediger Hoyer, Benjamin Betz
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Patent number: 11378048Abstract: A prime mover for a lightweight vehicle comprising an internal combustion engine, a starter motor integrally integrated with the internal combustion engine, and a housing for the prime mover. The prime mover additionally comprises a Hall Effect sensor and an prime mover control module structured and operable to communicate with the Hall Effect sensor, determine when operation of the internal combustion engine should cease, and upon the determination that operation of the internal combustion engine should cease, utilize the communication from the Hall Effect sensor to stop the internal combustion engine such that a piston of the internal combustion engine is positioned at between 15° and 25° after bottom-dead-center.Type: GrantFiled: May 1, 2020Date of Patent: July 5, 2022Assignee: Textron Inc.Inventors: Zekarias W. Yohannes, Matthew Wilcox, David Smith, Brian Moebs, Matthew D. Wilson, Russell William King
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Patent number: 11365911Abstract: A gas heat pump system is disclosed. The gas heat pump system includes an air conditioning module including a compressor, an outdoor heat exchanger, an expansion device, an indoor heat exchanger and a refrigerant pipe, an engine module including an engine configured to burn a mixture of fuel and air and provide power for operation of the compressor, a cooling module including a cooling water pump configured to generate flow of cooling water for cooling the engine and a cooling water pipe connected to the cooling water pump to guide flow of cooling water. The engine module includes a mixer configured to discharge the mixture of air and fuel to the engine, a supercharger disposed between the mixer and the engine to compress the mixture discharged from the mixer and discharge the mixture to the engine, and an adjuster disposed between the supercharger and the engine to adjust an amount of compressed mixture supplied to the engine.Type: GrantFiled: November 13, 2018Date of Patent: June 21, 2022Assignee: LG ELECTRONICS INC.Inventors: Minho Chung, Kwangho Shin, Kijung Ryu, Song Choi
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Patent number: 11359527Abstract: Disclosed is a method for control of an activation of a fluid sensitive sensor of an exhaust treatment system arranged for treating an exhaust stream, which includes: determining an exhaust temperature and an exhaust mass flow for the exhaust stream; determining if there is liquid fluid present in the exhaust stream at the fluid sensitive sensor, respectively, based on: 1) an elimination time function, wherein the elimination time function is based on the determined exhaust temperature and the determined exhaust mass flow; and 2) a corresponding lengths of a time period needed to eliminate a predetermined amount of liquid fluid from the exhaust stream; and controlling an activation of said fluid sensitive sensor based on the determination of if there is liquid fluid present in the exhaust treatment system at the fluid sensitive sensor.Type: GrantFiled: April 18, 2019Date of Patent: June 14, 2022Assignee: Scania CV ABInventors: Robin Van Trigt, Gilfredo Remon
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Patent number: 11352931Abstract: A method, system, and apparatus relating to operating an internal combustion engine include steps or features for determining a performance threshold of a particulate filter disposed in an exhaust gas flow of the engine having a set time interval between regeneration events of the particulate filter; determining a rate at which the particulate filter is reaching the performance threshold; and controlling an exhaust gas characteristic to control the rate so that the performance threshold is reached at or just before an end of the time interval. In an embodiment, there are steps or features for interpreting a filter condition of the particulate filter; determining a particulate matter load rate of the filter as a function of the condition; determining a limit of an exhaust gas characteristic based on the load rate; and controlling engine operation to control the exhaust gas characteristic to satisfy the limit.Type: GrantFiled: May 17, 2021Date of Patent: June 7, 2022Assignee: Cummins Inc.Inventors: Jeffrey David Selwyn Diwakar Abraham, Ananth Vemuri, Michael Haas, Adam W. Kidd
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Patent number: 11352923Abstract: A diagnostic system (10) is provided and includes a sensor (24) disposed downstream from an exhaust gas aftertreatment system. Also included in the diagnostic system (10) is a central diagnostic unit (35) configured to diagnose a condensation condition associated with the sensor (24) for mitigating a sensor failure due to water condensation on the sensor (24), the central diagnostic unit (35) performing the diagnosis on the condensation condition based on water storage and release information related to a component of the exhaust gas aftertreatment system. The sensor (24) is activated based on the water storage and release information.Type: GrantFiled: October 10, 2017Date of Patent: June 7, 2022Assignee: CUMMINS INC.Inventors: Saurabh Y. Joshi, Neal W. Currier, Aleksey Yezerets, Ashok Kumar, Tyler A. Rash, Anand Srinivasan, Di Wang, Yadan Tang
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Patent number: 11346265Abstract: Methods and systems are provided for an engine of a vehicle. In one example, a method includes activating a heater in response to an engine start request when a catalyst temperature is less than a threshold temperature.Type: GrantFiled: October 30, 2020Date of Patent: May 31, 2022Assignee: Ford Global Technologies, LLCInventor: Xiaogang Zhang
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Patent number: 11326499Abstract: The invention concerns a method for controlling regeneration of an exhaust gas aftertreatment system (7, 8) of an internal combustion engine (4) arranged on a vehicle (1), wherein the vehicle (1) is provided with a control system configured to control the regeneration in at least a first regeneration strategy mode comprising a first set of predetermined actions to be taken for controlling initialization and performance of regeneration processes.Type: GrantFiled: May 16, 2018Date of Patent: May 10, 2022Assignee: Volvo Truck CorporationInventors: Martin Wilhelmsson, Mattias Johansson
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Patent number: 11326492Abstract: The present disclosure relates to a hydrocarbon dosing system to control dosing of diesel fuel into an exhaust upstream of a vehicle's oxidation catalyst (VOC). The system 100 includes separate inlets (102,104) to allow inflow of a first fluid and the second fluid into the system, and an outlet 116. The first fluid configured to facilitate purging of the second fluid into the VOC through the outlet 116. The system 100 incorporates multiple valves (106, 108, 112) and pressure sensor 114 to control dosing and purging of the fluids. The system 100 provides an intrinsic non-return valve mechanism to restrict the flow of the first fluid into a fluid path of the second fluid, and vice versa. The system 100 provides intrinsic pressure relief mechanism for controlled release of pressure from system 100. The system 100 includes additional optional check valves 208 and filter screens 206 for redundancy purposes.Type: GrantFiled: November 8, 2019Date of Patent: May 10, 2022Assignee: ROTEX AUTOMATION LIMITEDInventor: Nirav Shah
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Patent number: 11326501Abstract: A cross-pipe exhaust assembly includes: a first inlet collector splitting into an upper outlet and a lower outlet; a second inlet collector splitting into an upper outlet and a lower outlet; a first outlet collector joining an upper inlet and a lower inlet into a single outlet of the first outlet collector; a second outlet collector joining an upper inlet and a lower inlet into a single outlet of the second outlet collector; a first inline conduit located between the first inlet collector and the first outlet collector; a second inline conduit located between the second inlet collector and the second outlet collector; a first crossover conduit extending between the first inlet collector and the second outlet collector; and a second crossover conduit extending between the second inlet collector and the first outlet collector.Type: GrantFiled: October 28, 2019Date of Patent: May 10, 2022Inventor: David Akiba Borla
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Patent number: 11319860Abstract: An exhaust manifold comprises a plurality of exhaust intake conduits structured to be fluidly coupled to an engine and receive exhaust gas from a corresponding cylinder of the engine. At least one exhaust intake conduit provides a reduction in an exhaust intake conduit cross-sectional area from an inlet to an outlet. A plurality of bends are each defined by a respective one of the exhaust intake conduit outlets. An exhaust intake manifold is fluidly coupled to the exhaust intake manifold and defines an exhaust intake manifold flow axis. Each of the plurality of bends is shaped so as to define n angle of approach of exhaust gas flowing therethrough. A first angle of approach of the first bend relative to the exhaust intake manifold flow axis is smaller than a second angle of approach of an inner second bend.Type: GrantFiled: June 1, 2020Date of Patent: May 3, 2022Assignee: Cummins Inc.Inventors: Daniel J. Mohr, Bogdan V. Pavlov, Nikhil J. Ajotikar, Yi-cheng Chen, David Eckroth
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Patent number: 11319887Abstract: Methods and systems are provided for monitoring a change in exhaust particulate filter (PF) soot load during an engine non-combusting condition. In one example, a method may include, responsive to a higher than threshold PF temperature immediately prior to an engine shutdown, estimating a rate of soot burn when the engine is no longer combusting, and estimating a soot load on the PF during and at an onset of immediately subsequent engine start based in part on the rate of soot burn.Type: GrantFiled: November 22, 2019Date of Patent: May 3, 2022Assignee: Ford Global Technologies, LLCInventors: Nikodem Suchta, Jacqueline A. Lymburner
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Patent number: 11319857Abstract: The present invention relates to a method for diagnosing aftertreatment of exhaust gases resulting from combustion, wherein at least a first substance resulting from said combustion is reduced by supplying additive to an exhaust gas stream resulting from said combustion and use of a first reduction catalytic converter. The method includes: estimating an accumulated expected reduction of said first substance during a first period of time, determining an accumulated actual reduction of said first substance during a period of time at least substantially overlapping said first period of time, and generating a signal indicating a fault in said reduction of said first substance when said accumulated actual reduction differs from said accumulated expected reduction by a predetermined difference in occurrence of said first substance. The invention also relates to a corresponding system.Type: GrantFiled: July 6, 2017Date of Patent: May 3, 2022Assignee: Scania CV ABInventors: Mikael Lundström, Sebastian Zamani, Carl Wahlström
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Patent number: 11319851Abstract: An exhaust gas treatment system to be fitted on a chassis of an automotive vehicle. The system includes a selective catalytic reduction device and a gaseous fluid supplying device. The gaseous fluid supplying device includes a tank containing a material which is capable of retaining gaseous fluid by absorption and/or adsorption and/or formation of chemical complexes, and of releasing previously retained gaseous fluid. The gaseous fluid supplying device further includes a gaseous fluid delivery system capable of causing the release of gaseous fluid by the material and an injection system for injecting gaseous fluid upstream from the selective catalytic reduction device. Additionally the system may include a particulate filtering device. The particulate filtering device, the selective catalytic reduction device and the gaseous fluid supplying device are arranged within a same frame which includes fastening means for fastening the frame to the vehicle chassis.Type: GrantFiled: December 19, 2013Date of Patent: May 3, 2022Assignee: VOLVO TRUCK CORPORATIONInventors: Yasuyoshi Tomita, Ayman Mokdad
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Patent number: 11313268Abstract: A method of monitoring an SCR catalyst in which an area factor (a) of the SCR catalyst is ascertained by means of an observer. It is concluded that there is a fault in the SCR catalyst when a comparison shows that the area factor (a) has gone below a threshold value (S).Type: GrantFiled: May 11, 2020Date of Patent: April 26, 2022Assignee: Robert Bosch GmbHInventors: Arthur Bastoreala, Tobias Pfister
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Patent number: 11313301Abstract: Methods of improving SCR performance in heavy duty vehicles may use multiple interdependent control techniques to increase engine exhaust temperatures in a fuel efficient manner. One method combines cylinder deactivation and mechanical loading of an engine by an electrical generator used to input energy into an exhaust stream to manipulate the exhaust temperature through the combined effect of modified air-to-fuel ratio and supplemental energy input. In particular, cylinder deactivation may be used to modify the engine air flowrate and the electric generator may be used to apply mechanical load on the engine to manipulate the engine fuel flow rate to control the engine air-to-fuel ratio and thereby increase exhaust temperatures. The exhaust temperatures may be further increased by using the electrical generator to add the energy generated as input energy to the exhaust stream.Type: GrantFiled: March 12, 2020Date of Patent: April 26, 2022Assignee: PACCAR INCInventors: Cynthia Chaffin Webb, Michael Douglas Gerty, Uday Vadlamani, Kimberly Denise McKinnon, Constantin Emil Nedelcu, Maarten Meijer, Charles Wayne Reinhardt Swart
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Patent number: 11300023Abstract: An exhaust gas purification system for an internal combustion engine includes a particulate filter (also referred to as GPF) to collect particulate matter (PM) in exhaust gas, an automatic transmission including a torque converter with a lock-up clutch, and a controller that controls the internal combustion engine to perform fuel cut when the internal combustion engine is decelerating and a temperature correlation value of lubricating oil (ATF) is higher than a determination value, and controls the automatic transmission to engage the lock-up clutch during execution of the fuel cut. The controller is configured to estimate a deposit amount of PM deposited on the GPF, and change the determination value to a smaller value than before the deposit amount exceeds a first deposit amount when the deposit amount exceeds a predetermined first deposit amount.Type: GrantFiled: March 11, 2021Date of Patent: April 12, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoya Kaneko, Hirofumi Kubota
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Patent number: 11293324Abstract: A short cyclic thermal treatment process in an engine aftertreatment system of a diesel engine in a vehicle, which may be able to recover and/or retain NOx conversion performance of an engine aftertreatment system by keeping the system clean from unintended pollution like accumulated urea deposits. The thermal treatment process is controlled by a process controller, arranged to carry out a long cyclic cleaning process at a first time interval, at a first exhaust gas temperature higher than the operational temperature in regeneration mode; combined with a short cyclic thermal treatment process at a second time interval, at a second exhaust gas temperature higher than the operational temperature in non-regeneration mode; wherein the second elevated exhaust gas temperature is lower than the first temperature.Type: GrantFiled: April 9, 2019Date of Patent: April 5, 2022Assignee: DAF Trucks N.V.Inventors: Kevin Arnold Maria Bisschops, Christiaan Kurvers, Geert Odulphus Martinus Van Kollenburg
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Patent number: 11286834Abstract: The present invention relates to a method for calibrating a UWS quality sensor arranged in a motor vehicle. In the method, the calibration of the UWS quality sensor takes place in an installed situation of the UWS quality sensor in the UWS tank.Type: GrantFiled: June 14, 2019Date of Patent: March 29, 2022Assignee: Robert Bosch GmbHInventor: Sascha Rademann
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Patent number: 11280280Abstract: Systems and methods for operating an engine that includes dual throttles are disclosed. In one example, positions of the dual throttles may be adjusted to limit flow of hydrocarbons from a hydrocarbon trap during cold engine starting so that an amount of hydrocarbons that reach atmosphere may be reduced. Each of the dual throttles may be positioned in a separate engine air intake passage.Type: GrantFiled: March 22, 2021Date of Patent: March 22, 2022Assignee: Ford Global Technologies, LLCInventors: Aed Dudar, Keith Weston
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Patent number: 11278850Abstract: A mixer is provided for mixing exhaust gas (A) flowing in an exhaust gas-carrying duct (14) of an internal combustion engine with reactant injected into the exhaust gas-carrying duct (14). The mixer includes a mixing body (22) with a reactant-receiving duct (34), an exhaust gas inlet opening device (54) with a plurality of exhaust gas inlet openings (56) leading to the reactant-receiving duct (34), and at least one releasing duct (40, 42) leading away from the reactant-receiving duct (34) with a releasing duct opening (48, 50) for releasing a reactant/exhaust gas mixture from the mixer body (22). An electrically energizable heater (68) is provided at the mixer body (22).Type: GrantFiled: June 18, 2019Date of Patent: March 22, 2022Assignee: PUREM GMBHInventors: Enver Kurpejovic, Fatih Uysal, Florian Friedrich, Oleksandr Semenov, Krishna Kumar Vempati
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Patent number: 11274589Abstract: A method for timing of a regeneration process of an exhaust gas system of a vehicle engine includes collecting, during operation of the vehicle, data on an exhaust gas regeneration capability as a function of time, establishing, from the collected data, a statistical probability function for the exhaust gas regeneration capability as a function of time, and identifying, from the probability function, one or several time periods that statistically are suitable and/or unsuitable for carrying out a regeneration process. A method for regeneration of an exhaust gas system of a vehicle engine is also provided.Type: GrantFiled: May 27, 2013Date of Patent: March 15, 2022Assignee: VOLVO TRUCK CORPORATIONInventors: Andreas Hamsten, Johan Dahl
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Patent number: 11268421Abstract: The invention relates to a regeneration air system for an exhaust aftertreatment system of an internal combustion engine and to such an exhaust aftertreatment system. The regeneration air system comprises a regeneration air delivery element, a regeneration air duct, and a regeneration air valve. A sensor system is provided in the regeneration air duct with which a regeneration air mass flow {dot over (m)}SL can be determined exactly. The exhaust aftertreatment system comprises an exhaust system with an exhaust duct in which, in the direction of flow of an exhaust gas through the exhaust duct, a three-way catalytic converter is arranged underhood and a four-way catalytic converter is arranged downstream. A provision is made that an intake point for the regeneration air from the regeneration air system is formed on the exhaust duct downstream from the underhood three-way catalytic converter and upstream from the four-way catalytic converter.Type: GrantFiled: January 14, 2020Date of Patent: March 8, 2022Assignee: VOLKSWAGEN AKTIENGESELLSCHAFTInventors: Martin Williges, Lars Stratmann, Rene Fink
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Patent number: 11268415Abstract: The invention relates to a method for controlling the temperature of an NOx controlling component in an exhaust after treatment system of an internal combustion engine. The NOx controlling component has inner surface portions defining an interior component space through which exhaust gases are arranged to flow in order to be NOx controlled, and has outer surface portions facing away from the interior component space. The method comprises the step of: controlling the temperature of at least a portion of the NOx controlling component by a heat transfer medium arranged outside of the outer surface portions. The invention also relates to an exhaust after treatment system and a vehicle with such a system.Type: GrantFiled: June 2, 2017Date of Patent: March 8, 2022Assignee: VOLVO TRUCK CORPORATIONInventors: Soran Shwan, Lars Carlhammar, Fredrik Blomgren
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Patent number: 11248554Abstract: Methods and systems are provided for increasing engine power via partial engine enrichment and exhaust gas recirculation. In one example, a method may include enriching a first set of engine cylinders and enleaning a second, remaining set of the engine cylinders, exhaust gas from the first set and the second set producing a stoichiometric mixture at a downstream emission control device, and providing exhaust gas recirculation (EGR) to an intake passage of the engine from the first set of cylinders and not from the second set. In this way, cooling effects from the partial enrichment and the EGR enable engine air flow, and thus engine power, to be increased while an efficiency of the emission control device is maintained, thereby decreasing vehicle emissions.Type: GrantFiled: September 3, 2019Date of Patent: February 15, 2022Assignee: Ford Global Technologies, LLCInventor: Aakash Puntambekar
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Patent number: 11242772Abstract: Embodiments of the present disclosure can include a system for generating steam. The system can include a direct steam generator configured to generate saturated steam and combustion exhaust constituents. A close coupled heat exchanger can be fluidly coupled to the direct steam generator, the close coupled heat exchanger can be configured to route the saturated or superheated steam and combustion exhaust constituents through an exhaust constituent removal system. The system can include an energy recovery system that reclaims the energy from the exhaust constituents.Type: GrantFiled: February 19, 2018Date of Patent: February 8, 2022Assignee: XDI Holdings, LLCInventors: James Charles Juranitch, Raymond C. Skinner, Thomas Raymond Juranitch, Alan C. Reynolds
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Patent number: 11242788Abstract: A vehicle exhaust system includes a mixer assembly for a vehicle exhaust system. The mixer assembly includes a mixer housing that defines an internal cavity and which includes at least one injection opening. A manifold is positioned within the internal cavity at the injection opening. A primary injector is configured to inject fluid through the injection opening and into the internal cavity, and at least one secondary injector, which is separate from the primary injector, is configured to inject fluid into the internal cavity when operating temperatures fall below a predetermined level.Type: GrantFiled: January 9, 2018Date of Patent: February 8, 2022Assignee: Faurecia Emissions Control Technologies, USA, LLCInventor: Edward Kinnaird
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Patent number: 11236658Abstract: A control device includes a first exhaust temperature calculation part calculating a temperature of exhaust flowing into a PM trapping device as a first exhaust temperature, a second exhaust temperature calculation part calculating a temperature of exhaust flowing out from the PM trapping device as a second exhaust temperature, a rate of change over time calculation part calculating a rate of change over time of the first exhaust temperature and a rate of change over time of the second exhaust temperature, and a judgment part judging if the PM trapping device is in a removed state removed from the exhaust passage based on a difference between the rate of change over time of the first exhaust temperature and the rate of change over time of the second exhaust temperature.Type: GrantFiled: August 13, 2020Date of Patent: February 1, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kazumasa Katoh, Takahiko Fujiwara, Kenji Igawa, Kentaro Mineo
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Patent number: 11220943Abstract: The present invention relates to an internal combustion engine arrangement (100) comprising a first (102) and a second (104) expansion cylinder, and an interconnection conduit (106) between an outlet (108) of the first expansion cylinder (102) and an outlet (110) of the second expansion cylinder (104), wherein the outlet of the first expansion cylinder is further arranged in fluid communication with an exhaust gas recirculation (EGR) conduit (112) for delivery of a flow of combusted exhaust gas to an intake passage of the internal combustion engine arrangement, and wherein the second expansion cylinder comprises a reducing agent injection device (114) for controllably delivery of a reducing agent into the second expansion cylinder.Type: GrantFiled: April 16, 2018Date of Patent: January 11, 2022Assignee: VOLVO TRUCK CORPORATIONInventors: Lennart Andersson, Arne Andersson
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Patent number: 11220947Abstract: A method for detecting the icing of a particulate filter, especially of a gasoline particulate filter, includes determining the temperature of the exhaust gas flow flowing through the particulate filter, whereby icing of the particulate filter is detected on the basis of the determined temperature of the exhaust gas flow. The method is improved in that the temperature of the exhaust gas flow upstream from the particulate filter and the temperature of the exhaust gas flow downstream from the particulate filter are determined, whereby on the basis of the measured temperature difference, the heat input into the particulate filter and the quantity of water present in the particulate filter are determined, whereby the aggregates states of the water present in the particulate filter are calculated by drawing up a balance of the heat quantity.Type: GrantFiled: May 16, 2019Date of Patent: January 11, 2022Assignee: VOLKSWAGEN AKTIENGESELLSCHAFTInventors: Chris Frehse, Christoph Nee, Sebastian Heinken, Hagen Müller
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Patent number: 11220944Abstract: A method of recovering selective catalytic reduction catalysts relates to metal-Zeolite based catalysts. A selective catalytic reduction catalyst service event where a metal-Zeolite based selective catalytic reduction catalyst of an exhaust aftertreatment system may perform below a threshold level of performance is determined. The selective catalytic reduction catalyst then exposed to a recovery fluid selected to facilitate movement of metal ions.Type: GrantFiled: December 27, 2016Date of Patent: January 11, 2022Assignee: Cummins Inc.Inventors: Jinyong Luo, Ashok Kumar, Krishna Kamasamudram, Neal W. Currier, Aleksey Yezerets, Yadan Tang, Michael J. Cunningham, Di Wang
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Patent number: 11208937Abstract: A method for diagnosing a diesel oxidation catalyst fault includes: obtaining an standard molar enthalpy of formation-revolution speed-load table; obtaining a revolution speed, a load, a temperature difference of front and rear exhaust pipes, and a casing temperature, obtaining an standard molar enthalpy of formation corresponding to the revolution speed and the load from the standard molar enthalpy of formation-revolution speed-load table, and calculating an actual formation enthalpy corresponding to the temperature difference of front and rear exhaust pipes and the casing temperature from the temperature difference of front and rear exhaust pipes and the casing temperature; calculating a standard reaction enthalpy from the standard molar enthalpy of formation and standard conversion efficiency; and diagnosing a diesel oxidation catalyst fault by comparing the actual formation enthalpy with the standard reaction enthalpy.Type: GrantFiled: June 23, 2021Date of Patent: December 28, 2021Assignee: TONGJI UNIVERSITYInventors: Piqiang Tan, Chaojie Yao, Deyuan Wang, Zhiyuan Hu, Diming Lou, Yunhua Zhang, Liang Fang
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Patent number: 11208938Abstract: An exhaust tail trim for a vehicle capable of being manufactured in various colors and having advantages of improving aesthetic sense, improving sense of integrated design and improving merchantability of a vehicle may include a heat pipe assembly disposed at an outside of an exhaust pipe through which exhaust gas is discharged; and a trim cover disposed at an end portion of the exhaust pipe and located at an outside of the heat pipe assembly, where the trim cover is made of synthetic resin.Type: GrantFiled: March 4, 2019Date of Patent: December 28, 2021Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventor: Dae Gil Hwang
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Patent number: 11193408Abstract: The present disclosure relates to a control unit (8) for controlling reactivation of a lean NOx trap (LNT) disposed in an exhaust system (3) connected to an internal combustion engine (2), the control unit (8). The control unit (8) has at least one processor (11) configured to generate a reactivate flag (RF) for the LNT (6). A memory device (12) having instructions stored therein is coupled to the at least one processor (11). The at least one processor (11) is configured to generate the reactivate flag (RF) when the exhaust gas supplied to the LNT (6) is lean and an LNT temperature (TLNT) is greater than or equal to a predefined LNT temperature threshold (T1). The present disclosure also relates to a method of controlling reactivation of the LNT (6). The present disclosure also relates to a vehicle comprising reactivation control apparatus.Type: GrantFiled: June 2, 2017Date of Patent: December 7, 2021Assignee: JAGUAR LAND ROVER LIMITEDInventors: Robert Bending, Michael Davies
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Patent number: 11193409Abstract: A method is provided for managing the light-off of a 3-way catalytic converter that is located in an exhaust line of a petrol engine having a plurality of cylinders with each cylinder having at least one exhaust valve. The method includes calculating a value of enthalpy of exhaust gases to make it possible to determine a quantity of heat supplied to the three-way catalyst, determining a threshold enthalpy value signaling the light-off of the catalyst, and stopping of activation of the three-way catalyst upon determining the value of the enthalpy that was calculated has reached the threshold enthalpy value.Type: GrantFiled: May 28, 2019Date of Patent: December 7, 2021Assignee: Nissan Motor Co., Ltd.Inventors: Thomas Leone, Guillaume Saucereau
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Patent number: 11187168Abstract: Methods and systems are provided for increasing engine power while reducing vehicle emissions and engine system degradation. In one example, a method may include, responsive to an engine load reaching a threshold load, increasing engine torque by increasing an amount of boost without providing exhaust gas recirculation (EGR), and, responsive to the engine torque reaching a first threshold torque, increasing the engine torque by increasing an EGR rate over a plurality of engine cycles while further increasing the amount of boost. In this way, cooling effects from the EGR enable engine air flow, and thus engine power, to be increased while engine vibrations and heat-related exhaust component degradation are decreased.Type: GrantFiled: September 3, 2019Date of Patent: November 30, 2021Assignee: Ford Global Technologies, LLCInventors: Aakash Puntambekar, Stephen George Russ