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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 15007. Отображено 100.
12-01-2012 дата публикации

Device for determining deterioration of catalyst and method for determining deterioration of catalyst

Номер: US20120006002A1
Автор: Daisuke Shibata, Taiga Hagimoto
Принадлежит: Toyota Motor Corp

The degree of deterioration of a catalyst is obtained accurately in cases where a plurality of catalysts is disposed at an exhaust passage of an internal combustion engine. Under the assumption that the degree of deterioration of a catalyst which is disposed at a location upstream of an NO x selective reduction catalyst and has an oxidizing ability is at a predetermined value, the ratio of NO 2 in the NO x which inflows into the NO x selective reduction catalyst is estimated; the NO x removal rate of the NO x selective reduction catalyst is calculated a plurality of times at least until a local maximum value is obtained; and the degree of deterioration of the catalyst having an oxidizing ability is determined by comparison between the ratio of NO 2 observed when the NO x removal rate of the NO x selective reduction catalyst reaches the local maximum value and a reference value of the ratio.

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Номер записи: 1
19-01-2012 дата публикации

Catalyst overheat prevention apparatus

Номер: US20120014410A1
Автор: Masahiro Kachi, Shinya Kondo
Принадлежит: Toyota Motor Corp

A catalyst overheat prevention apparatus has a temperature obtaining portion that estimates a convergence temperature of a catalyst provided in the exhaust system of an internal combustion engine and the present temperature of the catalyst. The catalyst overheat prevention apparatus also has a fuel increment calculation portion, a comparison portion, a correction portion, and a fuel increment setting portion, which are used to execute OT fuel increase control when the convergence temperature and present catalyst temperature obtained by the temperature obtaining portion are equal to or higher than an OT determination temperature. The catalyst overheat prevention apparatus also has a present temperature correction portion that corrects the present catalyst temperature to be equal to the OT determination temperature when the present catalyst temperature is equal to or higher than the OT determination temperature and the convergence temperature is equal to the OT determination temperature.

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Номер записи: 2
02-02-2012 дата публикации

Catalyst abnormality diagnosis apparatus

Номер: US20120023913A1
Автор: Mamoru Yoshioka, Ryota Onoe, Takahiko Fujiwara
Принадлежит: Toyota Motor Corp

The air-fuel ratio of exhaust gas supplied to a catalyst is alternately and actively switched between a rich state value and a lean state value. In conjunction with the performance of this active air-fuel ratio control, the oxygen storage capacity of the catalyst is measured. Whether the catalyst is normal or abnormal is determined by comparing the measured value of the oxygen storage capacity with a predetermined determination value. The temperature of the catalyst is acquired, and the determination value is set based on the acquired catalyst temperature. The determination value is set so as to decreases with increasing catalyst temperature when the catalyst temperature is equal to or higher than a predetermined temperature.

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Номер записи: 3
02-02-2012 дата публикации

Calibration scheme for an exhaust gas sensor

Номер: US20120029793A1
Автор: Chuan He, Dave Charles Weber, David John Kubinski, Michiel J. Van Nieuwstadt
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Various systems and methods are described for controlling an engine in a vehicle in response to an equilibrium value of an exhaust gas constituent generated from an exhaust gas sensor. One example method comprises during engine fueling below a threshold amount where at least one intake valve and one exhaust valve of the engine are operating: generating an equilibrium value of an exhaust gas constituent reading of the exhaust gas sensor, the equilibrium value based on a trajectory of the exhaust gas constituent reading, and under selected engine combusting conditions, adjusting the sensor signal based on the equilibrium value.

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Номер записи: 4
08-03-2012 дата публикации

Methods for engine exhaust nox control using no oxidation in the engine

Номер: US20120055138A1
Автор: David J. Cleary, David R. Monroe, Kevin L. Perry, Michael B. Viola, Thompson M. Sloane, Wei Li
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A powertrain includes an internal combustion engine having a combustion chamber and an aftertreatment system. A method for reducing NOx emissions in the powertrain includes monitoring an actual exhaust gas feedstream ratio of NO 2 to NO, monitoring a desired exhaust gas feedstream ratio of NO 2 to NO, comparing the actual and the desired exhaust gas feedstream ratios of NO 2 to NO, and selectively initiating a NO 2 generation cycle based upon the comparison of the actual and the desired exhaust gas feedstream ratios of NO 2 to NO comprising injecting fuel mass into the combustion chamber after a primary combustion event.

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Номер записи: 5
29-03-2012 дата публикации

Particulate matter sensor

Номер: US20120073267A1
Автор: James D. Cook, Steven J. Magee
Принадлежит: Honeywell International Inc

A particulate matter sensor includes a ceramic rod, a first metal layer deposited on the ceramic rod, a ceramic layer deposited on the first metal layer, and a second metal layer deposited on the ceramic layer. The first metal layer serves as a source electrode, and the second metal layer serves as a detection electrode. In another embodiment, a particulate matter sensor includes a metal rod, a ceramic sheet deposited or wrapped around the ceramic rod, and a metal layer deposited on the ceramic layer or sheet. The metal rod serves as a source electrode, and the second metal layer serves as a detection electrode.

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Номер записи: 6
05-04-2012 дата публикации

Filtration arrangement for an exhaust aftertreatment system for a locomotive two-stroke diesel engine

Номер: US20120079818A1
Автор: Gary R. Svihla
Принадлежит: Individual

A diesel locomotive filter arrangement for maintaining elements used to filter particulate matter generated by diesel engines. Servicing the filters is accomplished in a modular fashion through either the complete aftertreatment system and/or the individual elements in-situ. As to the in-situ arrangement, modularity is accomplished without structural liability to the system and with minimum system joint breakage. As to the complete system arrangement, modularity is accomplished via residing the entirety of the aftertreatment system on a support tray which is removable with minimum connection separation.

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Номер записи: 7
05-04-2012 дата публикации

Particulate filter ash loading prediction method and vehicle using same

Номер: US20120083967A1
Автор: Antonio Triana, Danan Dou, Ryan Nevin, Taner Tuken
Принадлежит: Deere and Co

A particulate filter ash loading prediction method including the steps of determining a service age for the particulate filter; calculating an ash accumulation rate in the particulate filter; determining a maximum service age for the particulate filter dependent upon the ash accumulation rate; and comparing the service age to the maximum service age. If the service age exceeds the maximum service age then indicating that a service and/or replacement of the particulate filter is needed due to ash loading.

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Номер записи: 8
05-04-2012 дата публикации

Particulate filter ash loading prediction method and vehicle using same

Номер: US20120083990A1
Автор: Antonio Triana, Danan Dou, Ryan Nevin, Taner Tuken
Принадлежит: Deere and Co

A particulate filter ash loading prediction method including the steps of determining a maximum average time for the filter; performing a calculation of a running average of time between regenerations of the filter; calculating an end-of-service life ratio of the filter dependent upon the maximum average time and the running average. The method further includes the steps of determining a delta pressure adjustment factor to compensate for ash loading of the filter depending upon the end-of-service life ratio; and comparing the delta pressure adjustment factor to a predetermined maximum delta pressure value, and, if the delta pressure adjustment factor exceeds the predetermined maximum normalized delta pressure adjustment factor, then indicating that a service or replacement of the filter is needed due to the ash loading.

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Номер записи: 9
03-05-2012 дата публикации

Method and device for detecting particulate matter contained in a gas to be measured

Номер: US20120103059A1
Автор: Mikiyasu Matsuoka, Takehito Kimata
Принадлежит: Denso Corp

A particulate matter detection element includes a capacitance component disposed in parallel with a detected resistance R SEN . A direct current-power source that supplies a direct current (I DC ) for particulate matter detection, and an alternating-current power source that supplies an alternating current (I AC ) for disconnection detection are provided.

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Номер записи: 10
24-05-2012 дата публикации

Particulate filter diagnostics

Номер: US20120125081A1
Автор: Daniel R. Hashbarger, Dean H. Dringenburg, Joan M. Wills, Phanindra Garimella, Pranati Yadav, Ross C. Berryhill
Принадлежит: Cummins Inc

A system includes an internal combustion engine producing an exhaust stream, a particulate filtering device that treats the exhaust stream, a particulate sensor operatively coupled to the exhaust stream at a position downstream of the particulate filtering device, and a temperature sensor operatively coupled to the exhaust stream. The system includes a controller that interprets a particulate sensor particulate stability condition, interprets a particulate sensor input value and a particulate sensor temperature, compensates the particulate sensor input value in response to the particulate sensor temperature, and filters the compensated particulate sensor input value. The controller determines a soot accumulation value in response to the filtered compensated particulate sensor input value, interprets a diagnostic enable condition, and determines a particulate filter diagnostic value in response to the active diagnostic enable condition and the soot accumulation value. The controller provides the particulate filter diagnostic value to an output device.

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Номер записи: 11
24-05-2012 дата публикации

Method for diagnosing a fault of an scr system

Номер: US20120126989A1
Автор: Ignazio Dentici, Roberto Vernassa
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A method is provided for diagnosing a fault in a selective catalytic reduction system having an electric driven transportation device that provide a mass flow of a Diesel Exhaust Fluid into the selective catalytic reduction system. The method includes, but is not limited to applying an electric signal to the transportation device for establishing the mass flow, monitoring a parameter value of the electric signal, monitoring the mass flow provided into the selective catalytic reduction system caused by the transportation device when it is driven with the signal, determining, for the monitored mass flow, the difference between the corresponding parameter value, and a corresponding parameter value stored in a data map.

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Номер записи: 12
02-08-2012 дата публикации

Exhaust gas pressure loss calculation device for engine

Номер: US20120192635A1
Автор: Kazuki Nishizawa, Kazunari Ide, Satoshi Yamada, Tomohide Yamada
Принадлежит: Mitsubishi Heavy Industries Ltd

An object of the present invention is to provide a corrected exhaust gas pressure loss calculation device which corrects an exhaust gas pressure loss that varies from moment to moment in accordance with engine operating conditions to a corrected exhaust gas pressure loss that can be used directly in control. The present invention converts an exhaust gas pressure into the corrected exhaust gas pressure loss, which is an exhaust gas pressure loss under a reference condition, from a relationship between an exhaust gas mass flow rate and an exhaust gas mass flow rate under the reference condition, a relationship between an exhaust gas temperature and an exhaust gas temperature under the reference condition, a relationship between the exhaust gas pressure and an exhaust gas pressure under the reference condition, and a relationship between an exhaust gas viscosity coefficient under a condition of the exhaust gas temperature and a viscosity coefficient of a viscous gas under the reference condition.

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Номер записи: 13
13-09-2012 дата публикации

Particulate filter regeneration process diagnostic

Номер: US20120227381A1
Автор: Paul Jasinkiewicz, Rebecca A. Oemke
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A system for the treatment of exhaust gases includes an engine, an exhaust system, and a controller. The exhaust aftertreatment system is configured to accept exhaust gas from the engine and includes a particulate filter configured to filter particulate matter from the exhaust gas. A controller is configured to determine an actual temperature of the particulate filter during a regeneration process and analyze the actual temperature relative to a temperature deviation threshold. The controller is configured to adjust the temperature deviation threshold in real time based, at least in part, on an operating condition of the engine and a mass flow of the exhaust gas.

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Номер записи: 14
18-10-2012 дата публикации

Abnormality determination device for particulate matter detection sensor

Номер: US20120260636A1
Автор: Hiroki NISHIJIMA, Tatsuhiro Hashida
Принадлежит: Toyota Motor Corp

Disclosed is an abnormality determination device capable of checking for abnormal particulate matter detection by a particulate matter detection sensor. The particulate matter detection sensor 10 includes a sensor element section 12 , which comes into contact with particulate matter in exhaust gas in an exhaust pipe 6 of an internal combustion engine 2 , and changes its output in accordance with the amount of particulate matter attached to the sensor element section 12 . A heater for the particulate matter detection sensor 10 is capable of heating the sensor element section 12 to a particulate matter elimination temperature (T 3 ) at which the particulate matter attached to the sensor element section 12 is eliminated from the sensor element section 12 . An ECU 50 determines, in accordance with output changes (S 1 to S 4 ) occurring in the particulate matter detection sensor 10 during heater control, whether or not the particulate matter detection sensor 10 is abnormal.

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Номер записи: 15
15-11-2012 дата публикации

Urea injector diagnostics using spectral analysis for scr nox reduction system

Номер: US20120286063A1
Автор: Stephen Paul Levijoki, Yue-Yun Wang
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A method to indicate an injector fault in a urea dosing module in an aftertreatment system includes monitoring a control command for the urea dosing module, determining a carry frequency for the control command, monitoring a delivery line pressure for the delivery line, evaluating the delivery line pressure at the carry frequency, and indicating the injector fault based upon the evaluating.

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Номер записи: 16
22-11-2012 дата публикации

Methods And System For Ash Detection In Exhaust Particulate Filter

Номер: US20120291419A1
Автор: Anthony C. Rodman, Michael A. Snopko, Rajesh N. Nair
Принадлежит: Caterpillar Inc

A method of detecting ash in an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy through an exhaust particulate filter containing soot and ash, and sensing a strength of the transmitted electromagnetic energy after having been attenuated in response to the soot. The method further includes electronically storing a filter monitoring history responsive to a difference between the transmitted strength and the sensed strength of the electromagnetic energy, and detecting an amount of the ash based at least in part upon a pattern of electromagnetic energy attenuation defined by the stored filter monitoring history. An exhaust particulate filter system for implementing related methodology includes a microprocessor configured to determine a value indicative of an amount of ash contained within an exhaust particulate filter responsive to a pattern of electromagnetic energy attenuation defined by a stored filter monitoring history.

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Номер записи: 17
22-11-2012 дата публикации

Exhaust treatment methods and systems

Номер: US20120291421A1
Автор: Matthew King, Paul Jasinkiewicz, Rebecca J. Darr
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A control method for an exhaust treatment system is provided. The method includes: selectively determining a fluid state from a plurality of fluid states based on a temperature of a fluid supply source; estimating an average consumption rate based on the fluid state; and evaluating a fluid supply within the fluid supply source based on the average consumption rate.

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Номер записи: 18
22-11-2012 дата публикации

Diagnostic apparatus for catalyst in fuel-property reforming system

Номер: US20120291424A1
Автор: Hiroyuki Inuzuka, Makoto Miwa
Принадлежит: Denso Corp

A diagnostic apparatus for a catalyst in a fuel-property reforming system includes an inlet-side temperature sensor disposed upstream of the fuel-reforming catalyst and an outlet-side temperature sensor disposed downstream of the fuel-reforming catalyst. In a reforming driving mode, while the EGR valve is opened to recirculate a part of exhaust gas into the intake pipe, a reforming-fuel injector injects a reforming fuel into the EGR gas. A fuel-reforming catalyst reforms the fuel into a fuel having high-combustibility. A differential temperature between a temperature detected by the inlet-side temperature sensor and a temperature detected by the outlet-side temperature sensor is compared with a deterioration-determination threshold, whereby a computer determines whether the fuel-reforming catalyst is deteriorated.

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Номер записи: 19
06-12-2012 дата публикации

Method, particle sensor and particle sensor system for measuring particles

Номер: US20120304736A1
Автор: Henrik Schittenhelm, Ralf Schmidt
Принадлежит: Individual

A method and a particle sensor ( 5 ) are provided for measuring particles, especially soot particles. The particles to be detected accumulate in a measuring region ( 10 ) of the particle sensor ( 5 ). The particles located in the gas stream ( 55 ) or the particles already accumulated in the measuring region ( 10 ) are burned by a combustion device ( 15 ), the combustion being controlled via a control signal from a control unit ( 20 ), which is electrically connected to a measuring device ( 25 ), in such a way that the quantity of the particles adhering in the measuring region ( 10 ) remains constant. The physical variable of the combustion device ( 15 ), which leads to the controlled combustion of the particles, is drawn upon as the signal amplitude of the particle sensor ( 5 ).

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Номер записи: 20
03-01-2013 дата публикации

Gas monitoring method implementing soot concentration detection

Номер: US20130000280A1
Автор: Sergey Korenev
Принадлежит: Caterpillar Inc

A method for detecting soot in a gas is disclosed. The method may include applying a voltage pulse to electrodes exposed to the gas, wherein the voltage pulse has a higher voltage amplitude than a breakdown voltage of the gas. The method may also include detecting breakdown of the gas, and determining a time to breakdown of the gas since application of the voltage pulse. The method may additionally include determining a concentration of particulate matter entrained in the gas based on the time to breakdown.

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Номер записи: 21
14-02-2013 дата публикации

Catalyst anomaly diagnostic system

Номер: US20130036808A1
Автор: Koichi Kitaura, Ryota Onoe, Takahiko Fujiwara, Yuuji Miyoshi
Принадлежит: Toyota Motor Corp

Active air-fuel ratio control is performed to alternately control an air-fuel ratio in an area located upstream of a catalyst between a lean side and a rich side. Switching is carried out between lean control and rich control at the same time when an output from a post-catalyst sensor reaches a threshold. Whether the catalyst is normal or abnormal is determined based on the rate of a change in the output from the post-catalyst sensor between a first point of time when a pre-catalyst air-fuel ratio reaches stoichiometry after the output from the post-catalyst sensor reaches the threshold and a second point of time when the output from the post-catalyst sensor reaches the threshold next time.

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Номер записи: 22
21-03-2013 дата публикации

METHOD AND DEVICE FOR DIAGNOSING AN ERROR IN AN EXHAUST GAS RECIRCULATION SYSTEM

Номер: US20130067893A1
Автор: Kuhn Daniel, MONTVAY Andras
Принадлежит:

In a method for determining a faulty exhaust gas recirculation line in an exhaust gas recirculation system of an internal combustion engine having multiple exhaust gas recirculation lines, a quantity of gas indicated by a specified exhaust gas recirculation rate is provided proportionately via the exhaust gas recirculation lines in accordance with an exhaust gas recirculation apportioning ratio, and the method further includes: testing in order to recognize an error in the exhaust gas recirculation system; when the error is recognized, performing a modification of the exhaust gas recirculation apportioning ratio and renewed testing of the exhaust gas recirculation system; and determination of the faulty exhaust gas recirculation line as a function of a result of the renewed testing. 1. A method for determining a faulty exhaust gas recirculation line in an exhaust gas recirculation system of an internal combustion engine having a plurality of exhaust gas recirculation lines , wherein a quantity of gas indicated by a specified exhaust gas recirculation rate is provided proportionately via the exhaust gas recirculation line in accordance with an exhaust gas recirculation apportioning ratio , the method comprising:testing the exhaust gas recirculation system in order to recognize an error in the exhaust gas recirculation system;when the error is recognized, performing (i) a modification of the exhaust gas recirculation apportioning ratio and (ii) a renewed testing of the exhaust gas recirculation system; anddetermining a faulty exhaust gas recirculation line as a function of a result of the renewed testing of the exhaust gas recirculation system.2. The method as recited in claim 1 , wherein claim 1 , when the error is recognized claim 1 , the exhaust gas recirculation apportioning ratio is modified in such a way that the quantity of exhaust gas to be recirculated is recirculated completely through only one of the exhaust gas recirculation lines.3. The method as recited ...

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Номер записи: 23
21-03-2013 дата публикации

Exhaust gas purification system of working machine

Номер: US20130067895A1
Автор: Yasuo Noma
Принадлежит: Individual

An exhaust gas purification device arranged in an exhaust system of an engine, and includes a renewing device for burning and removing a particulate matter within the exhaust gas purification device. The renewing device is operable in the case that a clogged state of the exhaust gas purification device is equal to or more than a prescribed level, wherein the exhaust gas purification system includes renewal admittance input means which allows an actuation of the renewing device, and rotating speed holding input means for holding a rotating speed of the engine to a predetermined rotating speed, and in the case that a turn-on operation of the rotating speed holding input means is carried out in a state in which an allowing operation of the renewal admittance input means is carried out, the rotating speed holding motion of the engine is executed in preference to an actuation of the renewing device.

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Номер записи: 24
28-03-2013 дата публикации

Engine catalyst diagnostics

Номер: US20130078725A1
Автор: Adam Banker, Imad Hassan Makki, James Michael Kerns, Michael James Uhrich, Pankaj Kumar, Stephen B. Smith
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Embodiments for predicting catalyst function are disclosed. One example embodiment includes applying a set of parameter readings for a given sample to a support vector machine to generate a classification output, recording a plurality of classification outputs for a plurality of successive samples over a first duration, and indicating catalyst degradation if a threshold percentage of the classification outputs indicates degraded catalyst performance. In this way, catalyst degradation may be indicated using a simplified model that does not require extensive calibration.

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Номер записи: 25
11-04-2013 дата публикации

Exhaust gas processing device

Номер: US20130086888A1
Автор: Ji Ho Cho, Jin Ha Lee
Принадлежит: Hyundai Motor Co, Kia Motors Corp

An exhaust gas treatment method having a particulate matter (PM) sensor on which a part of PM exhausted from a diesel particulate filter (DPF) may be attached and that generates a signal, may include determining a sensor trap PM model amount that may be trapped on the PM sensor in a condition that the diesel particulate filter may be operated normal according to an engine driving condition and a variation thereof, determining a sensor trap PM real amount that may be attached on the PM sensor by using the signal that may be generated from the PM sensor, and determining a condition of the diesel particulate filter by comparing the sensor trap PM model amount and the sensor trap PM real amount.

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Номер записи: 26
18-04-2013 дата публикации

METHOD AND DEVICE PERTAINING TO LIMITING THE TEMPERATURE OF A DOSING UNIT IN A SCR SYSTEM

Номер: US20130091829A1
Автор: Bremberg Per, Liljestrand Andreas
Принадлежит:

A method pertaining to an SCR system for cleaning of exhaust gases from an engine (). A dosing unit () is in thermal contact with the engine's exhaust system and supplies a reducing agent to an exhaust duct () of the exhaust system. Determining (s) whether there is an undesired temperature level of the dosing unit (). If yes, limit (s) the temperature of the exhaust duct () by controlling operation of the engine. Also, a computer programme product containing programme code (P) for implementing the method. Also a device and a motor vehicle () which is equipped with the device are disclosed. 1. A method pertaining to an SCR system for cleaning of exhaust gases from an engine , the engine generating an exhaust flow when operating , and ceasing generating an exhaust flow when operation halts;the system comprising a reducing agent dosing unit situated in thermal contact with an exhaust system of the engine for supplying a reducing agent to an exhaust duct of the exhaust system;the method comprising the steps of;determining whether there is an undesired temperature level of said dosing unit; andif said undesired temperature level is found, limiting the temperature of said exhaust duct by control of the operation of said engine.2. A method according to claim 1 , wherein said engine has an output shaft claim 1 , and said limitation of the temperature is achieved by reducing a maximum available torque of the output shaft of the engine.3. A method according to claim 1 , wherein said limitation of the temperature is achieved by influencing an EGR content of the engine.4. A method according to claim 1 , wherein said limitation of the temperature is achieved by influencing fuel injection times of at least one cylinder of the engine or by influencing ignition times of at least one cylinder of the engine.5. A method according to claim 1 , wherein said undesired temperature level is set based on characteristics of said reducing agent.6. A method according to claim 1 , wherein ...

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Номер записи: 27
02-05-2013 дата публикации

Exhaust treatment methods and systems

Номер: US20130104637A1
Автор: Janean E. Kowalkowski, John Coppola
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A control method for monitoring a selective catalytic reduction (“SCR”) device is provided. A control method includes adjusting an existing efficiency threshold based on a dosing adaptation value to determine an efficiency threshold. The dosing adaptation value represents an adjusted value of a supply of reductant based on a determined deviation of a downstream NOx concentration value to an expected NOx concentration. The control method includes comparing the efficiency threshold with a determined efficiency of the SCR device. The control method includes generating a message based on comparing the efficiency threshold with the determined efficiency of the SCR device.

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Номер записи: 28
09-05-2013 дата публикации

Over temperature / pressure safety device for diesel particulate filters

Номер: US20130111879A1
Автор: Kenneth J. Boshart
Принадлежит: Boshart Automotive Testing Services Inc

A safety device for an exhaust gas aftertreatment system provides an alternative exhaust route in case of high temperatures or pressures within the regenerating particulate filter of the exhaust gas aftertreatment system that may cause damage to the particulate filter. The safety device comprises a valve that redirects the flow of exhaust gas from the regenerating particulate filter when specified temperature or pressure thresholds are met or exceeded.

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Номер записи: 29
16-05-2013 дата публикации

ADVANCED EXHAUST-GAS SAMPLER FOR EXHAUST SENSOR

Номер: US20130118148A1
Автор: Zhang Xiaogang
Принадлежит: FORD GLOBAL TECHNOLOGIES, LLC

An exhaust-gas sampler is adapted to couple into an exhaust conduit and to sample a constituent of an engine exhaust flowing therein. The sampler comprises an envelope having upstream and downstream surfaces joined by a curved side surface. The upstream and downstream surfaces are each tangent to a plane substantially normal to a central axis of the exhaust conduit. A series of inlets are formed in the upstream surface, and an outlet is formed in the curved side surface. A sensor responsive to a level of the constituent in the exhaust is coupled in the envelope, at the peripheral region of the conduit. 121-. (canceled)22. An exhaust-gas sampler couplable into an exhaust conduit and to sample exhaust flowing therein , comprising:an envelope having upstream and downstream surfaces, each tangent to a plane normal to an exhaust conduit central axis, joined by a curved side surface with an outlet formed therein, and a series of inlets formed in the upstream surface including a first inlet and a second, larger, inlet arranged a greater distance from the outlet than the first inlet.23. The sampler of claim 22 , wherein the curved side surface guides the exhaust around the envelope claim 22 , inducing a pressure minimum at the outlet.24. The sampler of claim 22 , wherein an area of each inlet is proportional to the distance between that inlet and the outlet.25. The sampler of further comprising a sensor coupled in the envelope claim 22 , at a peripheral region of the conduit claim 22 , wherein the sensor is responsive to a level of a constituent in the exhaust.26. The sampler of claim 25 , wherein a first exhaust flow is admitted through the series of inlets and released through the outlet claim 25 , and wherein the sensor is arranged in the first exhaust flow fluidically between the inlets and the outlet.27. The sampler of claim 25 , wherein the envelope comprises a tube extending into the conduit along a first direction claim 25 , wherein the tube has a first end exterior ...

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Номер записи: 30
23-05-2013 дата публикации

SAMPLING TUBE FOR IMPROVED EXHAUST GAS FLOW TO EXHAUST SENSOR

Номер: US20130125533A1
Автор: Laga William L., Lewis Richard L., McKackin Mark E., Payton Charles S., Sullivan Raymond J.
Принадлежит:

An exhaust assembly for a vehicle includes an exhaust pipe through which an exhaust gas flows substantially in a first direction. The exhaust pipe includes a central region. The assembly also includes a sensor in fluid communication with the exhaust pipe and an elongated tube extending from a first end toward a second end and disposed at least partially within the exhaust pipe. The first end of the tube receives at least a portion of the sensor. The tube includes an inlet opening and an outlet opening. The inlet opening generally faces the exhaust gas flowing within the central region in the first direction so that some of the exhaust gas flowing in the central region enters the inlet opening. The tube directs the exhaust gas within the tube toward the sensor, and the exhaust gas within the tube flows out of the tube through the outlet opening. 1. An exhaust assembly for a vehicle , comprising:an exhaust pipe having an interior through which an exhaust gas flows substantially in a first direction, the interior having a central region;a sensor in fluid communication with the interior of the exhaust pipe; anda tube extending from a first end toward a second end and disposed at least partially within the interior of the exhaust pipe, the first end of the tube receiving at least a portion of the sensor and the second end of the tube being spaced from the sensor, the tube including an inlet opening, an outlet opening and a chamber between the inlet opening and outlet opening, the inlet opening being spaced from the sensor and open to the interior of the exhaust pipe so that some of the exhaust gas flowing within the exhaust pipe enters the chamber, at least a portion of the sensor being located between the inlet opening and the outlet opening and in fluid communication with the chamber so that gas that enters the chamber through the inlet opening flows through the chamber, is directed by the tube toward the sensor, and then flows out of the tube through the outlet ...

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Номер записи: 31
30-05-2013 дата публикации

Methods for an exhaust fluid sensor

Номер: US20130133309A1
Автор: Bret Alan Zimmerman, John Paul Bogema, Michiel J. Van Nieuwstadt, Timothy L. Jenkins
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Various methods are provided for diagnosing an exhaust fluid sensor disposed in an exhaust fluid passage. By monitoring the sensor during conditions when it is in contact with the exhaust fluid and when it is not in contact with the exhaust fluid, an expected change in the sensor output can be monitored to identify whether the sensor is generating sufficiently accurate readings.

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Номер записи: 32
06-06-2013 дата публикации

METHOD AND ALGORITHM FOR DIAGNOSING AN NH3 SENSOR IN AN SCR SYSTEM USING MEASUREMENTS FROM TWO CHANNELS OF THE SENSOR

Номер: US20130139489A1
Автор: Geveci Mert, Liu Feng
Принадлежит: Cummins Inc.

A system includes an internal combustion engine providing exhaust gases to an exhaust conduit, an aftertreatment system having an SCR catalyst component and disposed in the exhaust conduit. The system further includes a first NHsensing element preferentially sensitive to NHand a second NHsensing element preferentially sensitive to NOin the exhaust conduit. Both NHsensing elements are positioned downstream of the SCR catalyst component. The system includes a controller having a test conditions module that determines whether an NOconcentration downstream of the SCR catalyst component is below a threshold value, an NHdiagnostic module that provides a detection comparison value in response to the NOconcentration, a first signal from the first NHsensing element, and a second signal from the second NHsensing element. The controller includes a sensor condition module that provides an NHsensor condition value in response to the detection comparison value. 1. A system , comprising:an internal combustion engine providing exhaust gases to an exhaust conduit;an aftertreatment system disposed in the exhaust conduit, the aftertreatment system comprising a selective catalytic reduction (SCR) catalyst component;{'sub': 3', '3', '3, 'a first NHsensing element operationally coupled to the exhaust conduit at a position downstream of the SCR catalyst component, the first NHsensing element preferentially sensitive to NH;'}{'sub': 3', '3', '2, 'a second NHsensing element operationally coupled to the exhaust conduit at the position downstream of the SCR catalyst component, the second NHsensing element preferentially sensitive to NO;'} [{'sub': '2', 'a test conditions module structured to determine whether an NOconcentration at the position downstream of the SCR catalyst component is below a threshold value;'}, {'sub': 3', '2', '3', '3, 'an NHdiagnostic module structured to provide a detection comparison value in response to the NOconcentration being below the threshold value and further ...

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Номер записи: 33
13-06-2013 дата публикации

METHOD AND SYSTEM FOR EXHAUST CLEANING

Номер: US20130145822A1
Автор: Karlsson Carl-Johan, Telborn Klas
Принадлежит:

A method and a system for estimation of a soot load in a particle filter in an exhaust cleaning system, which estimation involves using a pressure drop across said particle filter in order to determine the soot load. Measurement of the pressure drop across the particle filter and therefore the estimation have to take place at a time when an exhaust mass flow of the exhaust cleaning system exceeds a flow threshold value, the particle filter is substantially free from water and a temperature of the particle filter exceeds a first threshold value. The result is a robust estimate of the soot load in the particle filter. 1. A method for estimation of a soot load in a particle filter in an exhaust cleaning system , comprising:measuring a pressure drop across said particle filter to determine said soot load in said filter, wherein said estimation is based on said measuring of said pressure drop at a specific time when an exhaust mass flow of said exhaust cleaning system exceeds a flow threshold value;determining whether said particle filter has for a sufficient period of time maintained a temperature above a second temperature threshold value which is high enough and for a sufficient period of time to remove water from said particle filter, so that said filter is substantially free from water; anddetermining whether a temperature of said particle filter exceeds a first threshold value which is higher than a temperature at which water in exhaust gases in said exhaust cleaning system can condense.2. A method according to claim 1 , determining a magnitude of said exhaust mass flow based on an exhaust mass flow of said exhaust cleaning system claim 1 , a pressure upstream of said exhaust mass from said particle filter and a temperature of said particle filter.3. A method according to claim 2 , further comprising:determining said pressure by means of a pressure sensor situated upstream in said exhaust mass flow from said particle filter; andsetting said flow threshold value at ...

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Номер записи: 34
13-06-2013 дата публикации

METHOD AND SYSTEM FOR EXHAUST CLEANING

Номер: US20130145930A1
Автор: Karlsson Carl-Johan, Telborn Klas
Принадлежит:

A method pertaining to regeneration of a particle filter () pertaining to a combustion process, which filter is arranged to treat exhaust gases arising from combustion in a combustion engine (). When at least one measure for raising the temperature of the particle filter () is activated, determining a temperature for the particle filter (), comparing the temperature determined with a first temperature and discontinuing the measure for raising the temperature of the particle filter () when the temperature determined is below the first temperature. 1. A method pertaining to regeneration of a particle filter pertaining to a combustion process , wherein the filter is arranged to treat exhaust gases arising from combustion in a combustion engine , the method comprising:(a) a first activating of at least one step for raising the temperature of said particle filter;{'sub': 'filter', '(b) determining a temperature Tof said particle filter;'}{'sub': filter', 'limit1, '(c) comparing said determined temperature Twith a first temperature T;'}{'sub': filter', 'limit1, 'd) when said determined temperature Tis below said first temperature T, discontinuing said step for raising the temperature of said particle filter, and when said measure for raising the temperature of said particle filter has been discontinued; and'}{'sub': filter', 'limit2', 'limit1, '(e) a second activating of at least one step for raising the temperature of said particle filter when said temperature Tof said filter exceeds a second temperature limit Twhich is higher than said first temperature T.'}2. A method according to claim 1 , wherein before (b) said determining of said temperature Tof said particle filter claim 1 ,{'sub': t', {'sub2': '—'}, 'lim1, '(f) waiting for a first period of time Tafter (a) said at least one temperature-raising step has been activated.'}3. A method according to claim 1 , wherein the method is performed for regenerating a particle filter of a vehicle and when said step for raising ...

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Номер записи: 35
04-07-2013 дата публикации

SYSTEM AND METHOD FOR REGENERATING THE PARTICULATE FILTER IN A DIESEL ENGINE

Номер: US20130167507A1
Автор: AIMAR Bruno, BARATTA Paola, BARUCCHI Enrico, CERCIELLO Giovanni, GAROMBO Danilo
Принадлежит:

In a diesel engine equipped with a system for automatic regeneration of a particulate filter, an automatic regeneration mode is inhibited in the case where there is recorded a number higher than a pre-set threshold of unfavorable event. When the automatic regeneration mode is inhibited, an on-demand regeneration mode is simultaneously enabled, which can be activated manually by the driver. If an on-demand regeneration is not performed before the vehicle has covered a certain mileage since the automatic regeneration mode was inhibited, the vehicle is set in a condition of limited performance. 1. A diesel engine , comprising:a particulate filter set in an exhaust line of the engine, and an electronic control unit for controlling the fuel injectors associated to the cylinders of the engine, which is programmed for activating—when an amount of particulate accumulated in said filter higher than a threshold value is detected or estimated—a modality of control of the injectors that determines automatic regeneration of the filter by an increase in a temperature of the exhaust gases sent to the filter sufficient for burning the particulate in the filter, exceeding of a pre-set threshold value of a number of unfavorable events; and', 'detection of a value lower than a pre-set threshold of a parameter identifying the quality of engine lubricating oil, and, 'the electronic control unit programmed for activating an alarm condition and inhibiting the automatic regeneration mode and enabling simultaneously an on-demand regeneration mode activatable manually by the driver when said electronic control unit detects the presence of at least one of the following two conditionssaid engine provided with manual control means for activation of the on-demand regeneration mode.2. The engine according to claim 1 , wherein said electronic control unit is programmed in such a way that claim 1 , in the case of detection of a number of unfavorable events higher than the threshold value claim 1 , ...

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Номер записи: 36
18-07-2013 дата публикации

CATALYST ABNORMALITY DIAGNOSIS APPARATUS

Номер: US20130180322A1
Автор: Kitaura Koichi
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

Active air-fuel ratio control is performed to alternately control an air-fuel ratio in an area located upstream of a catalyst between a lean side and a rich side. The amount of oxygen absorbed and released by the catalyst during lean control and rich control of the air-fuel ratio is measured. When an output from the post-catalyst sensor reaches a predetermined threshold, switching is carried out between the lean control and the rich control, and the measurement of the amount of oxygen is ended. The threshold is set to be reached before the output from the post-catalyst sensor reaches a predetermined reference value. Whether the catalyst is normal or abnormal is determined based on the amount of oxygen measured until the output from the post-catalyst sensor reaches the threshold and behavior of the output from the post-catalyst sensor observed after the output from the post-catalyst sensor reaches the threshold. 1. A catalyst abnormality diagnosis apparatus that diagnoses abnormality of a catalyst arranged in an exhaust passage in an internal combustion engine comprising:a post-catalyst sensor that detects an exhaust air-fuel ratio in an area located downstream of the catalyst;active air-fuel ratio control unit for alternately controlling an air-fuel ratio in an area located upstream of the catalyst between a lean side and a rich side;measurement unit for measuring an amount of oxygen absorbed and released by the catalyst during lean control and rich control of the air-fuel ratio; anddetermination unit for determining whether the catalyst is normal or abnormal,wherein when an output from the post-catalyst sensor reaches a predetermined threshold, the active air-fuel ratio control unit simultaneously switches between the lean control and the rich control, and the measurement unit ends measuring the amount of oxygen,the threshold includes a lean threshold that defines a timing for switching from the lean control to the rich control and a rich threshold that defines a ...

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Номер записи: 37
25-07-2013 дата публикации

RECOVERY CONTROL SYSTEM

Номер: US20130186073A1
Автор: Iwashita Takuro, Minezawa Masanobu, Onodera Takao
Принадлежит:

A recovery control system that allows a dosing valve to recover from a malfunction to a normal state, or a liquid feed line through which urea solution is fed to recover from clogging to a normal state. An abnormality detector detects an abnormality of the dosing valve and a recovery controller controls a supply module to feed urea solution in the dosing valve back to an urea tank when the abnormality detector detects the abnormality. 1. A recovery control system for allowing a dosing valve through which urea solution is injected into an exhaust pipe to recover from a malfunction to a normal state , comprising the dosing valve and a supply module that sucks up urea solution in a urea tank and supplies the urea solution to the dosing valve and feeds the urea solution in the dosing valve back to the urea tank , the dosing valve having a cylinder charged with the urea solution , a plunger that opens and closes a normally closed valving element of the cylinder and a coil that operates the plunger ,wherein the recovery control system further comprises:abnormality detection means of monitoring the dosing valve and detecting an abnormality of the dosing valve; andrecovery control means of controlling the supply module to feed the urea solution in the dosing valve back to the urea tank when the abnormality detection means detects an abnormality of the dosing valve.2. A recovery control system for allowing a liquid feed line to recover from clogging to a normal state , comprising a dosing valve through which urea solution is injected into an exhaust pipe and a supply module that sucks up urea solution in a urea tank and supplies the urea solution to the dosing valve and feeds the urea solution in the dosing valve back to the urea tank , the urea tank and the supply module being connected to each other by the liquid feed line ,wherein the recovery control system further comprises:pressure abnormality detection means of detecting an abnormality in a urea solution pressure ...

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Номер записи: 38
01-08-2013 дата публикации

EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Номер: US20130192209A1
Автор: Morita Kouji, Tsukagoshi Takahiro
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

An exhaust emission control apparatus for an internal combustion engine includes: an exhaust gas purification catalyst arranged in an exhaust gas passage of the internal combustion engine; an air/fuel ratio sensor installed on an upstream side of the exhaust gas purification catalyst and detects an air/fuel ratio of an exhaust gas discharged from the internal combustion engine; air/fuel ratio feedback control means that performs feedback control of the air/fuel ratio based on an output of the air/fuel ratio sensor; and sensor output correcting means that corrects a shift in the output of the air/fuel ratio sensor. The sensor output correcting means is configured so as to correct a shift in the output of the air/fuel ratio sensor using a lean shift amount of the air/fuel ratio sensor output in accordance with a quantity and/or a proportion of an aldehyde included in the exhaust gas. 1. An exhaust emission control apparatus for an internal combustion engine , comprising:an exhaust gas purification catalyst that is arranged in an exhaust gas passage of the internal combustion engine and that purifies an exhaust gas;an air/fuel ratio sensor that is arranged on an upstream side of the exhaust gas purification catalyst and that detects an air/fuel ratio of an exhaust gas that is discharged from the internal combustion engine;air/fuel ratio feedback control means that performs feedback control of the air/fuel ratio of the internal combustion engine based on an output of the air/fuel ratio sensor; andsensor output correcting means that corrects a shift in the output of the air/fuel ratio sensor that is caused by a component included in the exhaust gas;wherein the sensor output correcting means is configured so as to correct a shift in the output of the air/fuel ratio sensor using a lean shift amount of the output of the air/fuel ratio sensor in accordance with a quantity and/or a proportion of an aldehyde included in the exhaust gas.2. The exhaust emission control apparatus ...

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Номер записи: 39
01-08-2013 дата публикации

EMISSION CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE

Номер: US20130192210A1
Автор: MATSUOKA Mikiyasu, Nakano Kosuke, NAKATA Shingo
Принадлежит: Denso Corporation

An emission control system for an engine includes a catalyst and an exhaust-gas sensor provided downstream of the catalyst in a flow direction of exhaust gas. The exhaust-gas sensor includes a sensor element that includes a pair of electrodes and a solid electrolyte body located between the electrodes. The emission control system further includes a constant current supply portion that changes an output characteristic of the exhaust-gas sensor by applying a constant current between the electrodes, a rich direction control portion that performs a rich direction control after a fuelling-stop control, and a characteristic control portion that performs a rich responsiveness control during the rich direction control. In the rich direction control, an air-fuel ratio of the exhaust gas is made to be richer. In the rich responsiveness control, the constant current supply portion increases a detection responsiveness of the exhaust-gas sensor with respect to rich gas. 1. An emission control system for an internal combustion engine , comprising:a catalyst used for purification of exhaust gas discharged from the engine;an exhaust-gas sensor provided downstream of the catalyst in a flow direction of the exhaust gas to detect an air-fuel ratio of the exhaust gas or detects whether the exhaust gas is rich or lean, the exhaust-gas sensor including a sensor element that includes a pair of electrodes and a solid electrolyte body located between the pair of electrodes;a constant current supply portion that changes an output characteristic of the exhaust-gas sensor by applying a constant current between the pair of electrodes;a rich direction control portion which performs a rich direction control, in which an air-fuel ratio of the exhaust gas flowing into the catalyst is made to be richer than a target air-fuel ratio set based on a normal operation condition, after a termination of a fuelling-stop control in which fuel injection of the engine is stopped; anda characteristic control ...

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Номер записи: 40
08-08-2013 дата публикации

DEVICE FOR PURIFYING EXHAUST GAS OF INTERNAL COMBUSTION ENGINE

Номер: US20130199161A1
Автор: Aisaka Takeho, Iwazaki Yasushi, KAWAMURA Yusuke, Matsumoto Takuya, NAKAMURA Takashi, SATO Makoto, Sawada Hiroshi
Принадлежит:

An electronic control device calculates the maximum actual oxygen storage capacity of a catalyst. The gradient of a linear expression formed between the catalyst temperature and the maximum oxygen storage capacity of the catalyst is stored for each degradation level of the catalyst. The gradient can be learned in accordance with the same temperature of the catalyst and the maximum actual oxygen storage capacity. When the maximum actual oxygen storage capacity is calculated, it is revised in accordance with the temperature of the catalyst, a reference temperature, the linear expression, and the learned gradient. The revised maximum oxygen storage capacity which is the maximum oxygen storage capacity when the temperature of the catalyst during the same calculation period is equal to the reference temperature is then calculated. If a response delay is detected in the output of an oxygen sensor, the gradient of the learned linear expression is discarded. 1. An exhaust purifying apparatus comprising:a catalyst that is capable of oxygen storage and is located in an exhaust passage of an internal combustion engine;an oxygen sensor located in the exhaust passage downstream of the catalyst in an exhaust stream; andan electronic control unit, whereinthe electronic control unit includes:a calculating section, which calculates a maximum oxygen storage amount of the catalyst on the basis of an engine operating condition and changes in an output of the oxygen sensor;a learning section, which learns a function regarding the oxygen storage amount of the catalyst on the basis of the maximum oxygen storage amount calculated by the calculating section;a correcting section, which corrects the maximum oxygen storage amount calculated by the calculating section on the basis of the maximum oxygen storage amount calculated by the calculating section and the function, thereby calculating a corrected maximum oxygen storage amount; anda discarding section, which discards the function already ...

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Номер записи: 41
08-08-2013 дата публикации

Method and device for adapting signals of an oxygen sensor in the air supply channel of an internal combustion engine

Номер: US20130199177A1
Автор: Holberg Richard, Reichert Christian
Принадлежит:

A method/device for evaluating oxygen sensor signals of an air supply channel connected to an exhaust gas channel of the internal combustion engine, via an exhaust gas recirculation having at least one exhaust gas recirculation valve; the oxygen sensor being downstream from the exhaust gas recirculation initiation; the sensor signal(s) being corrected as a function of at least one characteristics variable describing the dependence of the sensor signal on the oxygen concentration or a correlated variable, and/or additional physical variables. At at least one engine operating point(s), in response to a closed exhaust gas recirculation valve, output oxygen sensor signals and additional operating point parameters are recorded/stored; and an adaptation of the characteristic variables is derived assuming that the gas composition corresponds to pure air. Also, a characteristics curve adjustment and a compensation of pressure temperature dependencies may be performed to improve the accuracy of the oxygen sensor signals. 1. A method for evaluating signals of an oxygen sensor , the method comprising:obtaining sensor signals from the oxygen sensor in an air supply channel of an internal combustion engine, the air supply channel being connected to an exhaust gas channel of the internal combustion engine, via an exhaust gas recirculation which has at least one exhaust gas recirculation valve, the oxygen sensor being situated in the air supply channel downstream from the exhaust gas recirculation initiation;correcting the sensor signals as a function of at least one characteristics variable, which describes the dependence of the sensor signals on at least one of (i) one of an oxygen concentration and a variable correlated with the oxygen concentration, and (ii) at least one additional physical variable;at at least one operating point of the internal combustion engine, in response to a closed exhaust gas recirculation valve, outputting signals of the oxygen sensor, and recording ...

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Номер записи: 42
08-08-2013 дата публикации

Exhaust gas purification system

Номер: US20130202493A1
Автор: Atsushi Ohta, Hiroshi Oohashi, Taichi Togashi, Tomohiro Fukuda, Yasuo Noma
Принадлежит: Individual

An exhaust gas purification system comprises an exhaust gas purification device which is arranged in an exhaust gas route of an engine, renewing devices, for burning and removing a particulate matter within the exhaust gas purification device, renewal advance notifying means which is actuated in the case that a clogged state of the exhaust gas purification device becomes equal to or more than a prescribed level, and renewal informing means which informs of a fact that the renewing devices are under operation. The renewal advance notifying means is actuated before actuating the renewing devices.

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Номер записи: 43
08-08-2013 дата публикации

System and method for controlling an engine

Номер: US20130204508A1
Автор: Christopher C. Swoish, Christopher Whitt, Douglas Christopher Sarsen
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A method for controlling regeneration within an after-treatment component of an engine comprises receiving an upstream temperature signal representing a temperature of an exhaust stream upstream from the after-treatment component and calculating an expected downstream temperature based on the upstream temperature signal and a model for calculating the expected downstream temperature. A temperature index is calculated based on the upstream temperature signal and the expected downstream temperature, and an estimate of accumulated particulate matter in the after-treatment component is calculated based, at least in part, on the temperature index. The estimate of accumulated particulate matter in the after-treatment component is compared to a predetermined threshold associated with the after-treatment component, and a remedial action is initiated when the estimate of accumulated particulate matter in the after-treatment component exceeds the predetermined threshold.

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Номер записи: 44
22-08-2013 дата публикации

Exhaust gas sensor module

Номер: US20130213013A1
Автор: Abhishek Manekar, Douglas A. Mitchell, Jim Clerc, Tamas Szailer, William L. Simonton, Z. Gerald Liu
Принадлежит: Cummins Intellectual Property Inc

Described herein is a sensor module for sensing characteristics of a fluid flowing through a fluid conduit. The sensor module includes a sample probe with at least one sample arm that extends radially inwardly from a sidewall portion of the fluid conduit to a center portion of the fluid conduit, defines a fluid flow channel, and includes a plurality of inlet apertures. The sample probe also includes a sensor well that is located at a radially outer end of the at least one sample arm. The sensor well defines an interior volume that is in fluid communication with the fluid flow channel, an upstream portion closed to an first portion of the fluid conduit upstream of sensor well, and a discharge aperture open to a second portion of the fluid conduit downstream of the sensor well. The sensor module also includes a sensor positioned in the interior volume.

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Номер записи: 45
22-08-2013 дата публикации

REDUCING AGENT INJECTION VALVE ABNORMALITY DETECTION UNIT AND REDUCING AGENT SUPPLY APPARATUS

Номер: US20130213014A1
Автор: Ohno Shigehiro
Принадлежит: BOSCH CORPORATION

[Problem] To provide a reducing agent injection valve abnormality detection unit capable of precisely determining whether or not a reducing agent injection valve is abnormally stuck, and a reducing agent supply apparatus. 14-. (canceled)5. A reducing agent injection valve abnormality detection unit for detecting whether or not a reducing agent injection valve in a reducing agent supply apparatus is abnormally stuck , the reducing agent supply apparatus comprising: a storage tank for storing a liquid reducing agent; a pump for pumping the reducing agent; the reducing agent injection valve for injecting the reducing agent pumped by the pump in an exhaust pipe of an internal-combustion engine; and a reducing agent passage connecting the pump to the reducing agent injection valve , the reducing agent injection valve abnormality detection unit comprising:a reducing agent collection control means for, when an instruction for opening the reducing agent injection valve has been issued, performing control so that the reducing agent in the reducing agent passage is collected into the storage tank;a reducing agent filling control means for, when an instruction for closing the reducing agent injection valve has been issued after the control for collecting the reducing agent, performing control so that the reducing agent passage is refilled with the reducing agent; andan abnormality determination means for determining whether or not the reducing agent injection valve is abnormally stuck, based on change in the pressure in the reducing agent passage during the control for refilling with the reducing agent.6. The reducing agent injection valve abnormality detection unit according to claim 5 , wherein the abnormality determination means can determine both whether or not the reducing agent injection valve is stuck open and whether or not the reducing agent injection valve is stuck closed claim 5 , based on the change in the pressure.7. The reducing agent injection valve abnormality ...

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Номер записи: 46
22-08-2013 дата публикации

Failure detecting apparatus for particulate filter

Номер: US20130213236A1
Автор: Daisuke Shibata, Kazuya Takaoka
Принадлежит: Toyota Motor Corp

An object of the present invention is to detect any breakdown or failure of a particulate filter more appropriately. A failure detecting apparatus for detecting failure of a particulate filter according to the present invention comprises an acquiring section which acquires an amount of PM contained in an exhaust gas allowed to outflow from the particulate filter; a regeneration process executing section which executes a filter regeneration process for oxidizing and removing PM deposited in the particulate filter; and a failure judging section which judges that the particulate filter is in the failure state if a decreased amount of the amount of PM contained in the exhaust gas acquired by the acquiring section, during a predetermined period of time as started from a point in time at which the execution of the filter regeneration process performed by the regeneration process executing section is completed, is not equal to or larger than a predetermined reference amount.

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Номер записи: 47
29-08-2013 дата публикации

CONTROL SYSTEM FOR DETERMINING BIOFUEL CONTENT

Номер: US20130219862A1
Автор: Garimella Phanindra, Kumar Shankar
Принадлежит:

A system includes an internal combustion engine having an air intake, a fuel inlet, and exhaust outlet. The system further includes a NOsensor operably coupled to the exhaust outlet and structured to provide an exhaust Ovalue, and a controller structured to functionally execute operations for determining a tank biofuel value. The controller includes an operation conditions module that interprets an intake Ovalue, the exhaust Ovalue, and a biofuel Ocorrelation, an Ofuel determination module that determines an Obiofuel value in response to the intake Ovalue, the exhaust Ovalue, and the biofuel Ocorrelation, and a fuel composition module that determines a tank biofuel value in response to the Obiofuel value. The controller further includes a biofuel reporting module that provides the tank biofuel value. 1. A system , comprising:an internal combustion engine having an air intake, fuel inlet and exhaust outlet;{'sub': x', '2, 'a NOsensor operably coupled to the exhaust outlet and structured to provide an exhaust Ovalue; and'} [{'sub': 2', '2', '2, 'an operation conditions module structured to interpret an intake Ovalue, the exhaust Ovalue, and a biofuel Ocorrelation;'}, {'sub': 2', '2', '2', '2', '2, 'an Ofuel determination module structured to determine an Obiofuel value in response to the intake Ovalue, the exhaust Ovalue, and the biofuel Ocorrelation;'}, {'sub': '2', 'a fuel composition module structured to determine a tank biofuel value in response to the Obiofuel value; and'}, 'a biofuel reporting module structured to provide the tank biofuel value., 'a controller comprising2. The system of claim 1 , further comprising an engine operations module structured to adjust a fueling parameter in response to the tank biofuel value.3. The system of claim 1 , wherein the operation conditions module is further structured to interpret a current operating condition claim 1 , an exhaust NOvalue claim 1 , and a biofuel NOcorrelation claim 1 , the controller further comprising a ...

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Номер записи: 48
05-09-2013 дата публикации

DIAGNOSTICS FOR HYDROCARBON INJECTION FOR FILTER REGENERATION

Номер: US20130227935A1
Автор: Fontana Massimo
Принадлежит:

A method of determining a malfunction in a hydrocarbon injection system for an internal combustion engine having an exhaust system with a diesel particulate filter and a diesel oxidation catalyst, is provided. An efficiency of a diesel oxidation catalyst to convert hydrocarbons injected for regeneration of a diesel particulate filter into heat is estimated based upon an input temperature of the diesel oxidation catalyst, an output temperature of the diesel oxidation catalyst, and an output temperature of a diesel particulate filter. The estimated efficiency is compared to a predetermined stored efficiency value. An indication of a malfunction is generated when the comparison of the estimated efficiency to the predetermined stored efficiency exceeds a threshold amount. 1. A method of detecting malfunctions in a system for providing hydrocarbons to an engine exhaust for regenerating a diesel particulate filter within an exhaust system of a diesel engine , the diesel engine comprising an electronic control module , at least one cylinder , and at least one fuel injector in fluid communication with the at least one cylinder , and a diesel oxidation catalyst within the exhaust system , the method comprising:monitoring flow rate of exhaust gas through the exhaust system with the electronic control module;monitoring temperature of a diesel oxidation catalyst input with the electronic control module;monitoring temperature of a diesel oxidation catalyst output with the electronic control module;monitoring temperature of a diesel particulate filter output with the electronic control module;determining an efficiency of converting hydrocarbons within the diesel oxidation catalyst into heat with the electronic control module;comparing the determined efficiency of combustion of hydrocarbons within the diesel oxidation catalyst to a predefined efficiency; andgenerating an alarm when the difference in the determined efficiency is above a first predetermined limit and below a second ...

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Номер записи: 49
05-09-2013 дата публикации

NON-INTRUSIVE EXHAUST GAS SENSOR MONITORING

Номер: US20130231847A1
Автор: Banker Adam Nathan, Kerns James Michael, Makki Imad Hassan, Uhrich Michael James
Принадлежит: FORD GLOBAL TECHNOLOGIES, LLC

Systems and methods for monitoring an exhaust gas sensor coupled in an engine exhaust are provided. In one example approach, a method comprises indicating exhaust gas sensor degradation based on a downstream exhaust gas sensor responding before the upstream exhaust gas sensor during a commanded change in air-fuel ratio. 1. A method of monitoring an upstream exhaust gas sensor coupled in an engine exhaust , comprising:indicating exhaust gas sensor degradation based on a downstream exhaust gas sensor responding before the upstream exhaust gas sensor during a commanded change in air-fuel ratio.2. The method of claim 1 , wherein the commanded change in air-fuel ratio comprises entry into or exit out of deceleration fuel shut-off3. The method of claim 1 , wherein the upstream exhaust gas sensor is coupled in the engine exhaust upstream of an emission control device and wherein the downstream exhaust gas sensor is coupled in the engine exhaust downstream of the emission control device.4. The method of claim 1 , wherein indicating exhaust gas sensor degradation based on a downstream exhaust gas sensor responding before the upstream exhaust gas sensor during a commanded change in air-fuel ratio includes indicating exhaust gas sensor degradation in response to a change in measured lambda at the upstream exhaust gas sensor less than a first threshold change when a change in measured lambda at the downstream exhaust gas sensor is greater than a second threshold change.5. The method of claim 4 , wherein the second threshold change indicates that a response to the commanded change in air-fuel ratio has started and wherein the first threshold change is a desired response based on the commanded change in air-fuel ratio.6. The method of claim 1 , wherein indicating exhaust gas sensor degradation based on a downstream exhaust gas sensor responding before the upstream exhaust gas sensor during a commanded change in air-fuel ratio includes indicating exhaust gas sensor degradation in ...

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Номер записи: 50
19-09-2013 дата публикации

Exhaust Treatment Secondary Air Supply System

Номер: US20130239548A1
Автор: Gary Butzke
Принадлежит: Individual

A system for treating the exhaust output by an internal combustion engine includes a regeneration positioned upstream from a diesel particulate filter. The regeneration unit combusts a fuel to heat the exhaust entering the diesel particulate filter. An air pump supplies a secondary source of compressed air to the regeneration unit and is adapted to be driven by the internal combustion engine. A speed sensor is coupled to the air pump and operable to output a signal indicative of a rotational speed of an air pump component. A controller receives the speed sensor signal and determines an operating speed of the internal combustion engine based on the speed sensor signal. The controller controls the regeneration unit based on the engine operating speed.

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Номер записи: 51
26-09-2013 дата публикации

Exhaust gas purification system for an internal combustion engine

Номер: US20130247546A1
Автор: Masahiko Masubuchi
Принадлежит: Toyota Motor Corp

The present invention is intended to suppress, in an exhaust gas purification system for an internal combustion engine capable of mixing and combusting liquid fuel and compressed natural gas, an excessive rise in temperature of an exhaust gas purification device at the time when the exhaust gas purification device is caused to regenerate. In the exhaust gas purification system for an internal combustion engine according to the present invention, when the liquid fuel and the compressed natural gas are caused to mix and combust in the internal combustion engine at the time of regenerating the exhaust gas purification device, an amount of HC to be supplied to the exhaust gas purification device from an HC supply device is decreased in comparison with the time when only the liquid fuel is caused to combust in the internal combustion engine.

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Номер записи: 52
03-10-2013 дата публикации

CATALYST DETERIORATION DIAGNOSIS METHOD, METHOD FOR PURIFICATION OF EXHAUST GAS USING THE DIAGNOSIS METHOD, CATALYST DETERIORATION DIAGNOSIS APPARATUS, AND APPARATUS FOR PURIFICATION OF EXHAUST GAS USING THE DIAGNOSIS APPARATUS

Номер: US20130255228A1
Автор: Morikawa Akira, SAKAMOTO Yoshiyuki, SUDA Akihiko
Принадлежит: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO

A catalyst deterioration diagnosis method for diagnosing deterioration of a catalyst for purification of exhaust gas by using a test catalyst disposed in an exhaust gas flow path through which the exhaust gas flows, the method including an exhaust gas control step of inverting an air-fuel ratio of the exhaust gas in the flow path from a lean side to a rich side or from a rich side to a lean side; a measurement step of measuring a change over time in electrical resistance of the test catalyst at the inversion of the air-fuel ratio and finding a resistance change ratio of the test catalyst; and a determination step of determining catalytic deterioration of the test catalyst based on the resistance change ratio. 1. A catalyst deterioration diagnosis method for diagnosing deterioration of a catalyst for purification of exhaust gas by using a test catalyst disposed in an exhaust gas flow path through which the exhaust gas flows , the method comprising:an exhaust gas control step of inverting an air-fuel ratio of the exhaust gas in the flow path from a lean side to a rich side or from a rich side to a lean side;a measurement step of measuring a change over time in electrical resistance of the test catalyst at the inversion of the air-fuel ratio and finding a resistance change ratio of the test catalyst; anda determination step of determining deterioration of the test catalyst based on the resistance change ratio.2. The catalyst deterioration diagnosis method according to claim 1 , whereina catalyst deterioration diagnosis apparatus is used which comprises at least one pair of first electrodes which are disposed in the flow path and which face each other, the test catalyst disposed between the first electrodes, resistance value measurement means electrically connected to the test catalyst, and determination means electrically connected to the resistance value measurement means,in the measurement step, the resistance change ratio of the test catalyst is found by causing the ...

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Номер записи: 53
03-10-2013 дата публикации

OXYGEN SENSOR CONTROL APPARATUS

Номер: US20130255232A1
Автор: MAEDA Seiji
Принадлежит:

An oxygen sensor control apparatus includes internal resistance detection means S3, controlled internal resistance obtaining means S4 to S11, and heater energization control means S12. When a timing for detecting the internal resistance R(n) comes during a lean period TL, the controlled internal resistance obtaining means uses the detected internal resistance R(n) as the controlled internal resistance Rf. When a timing for detecting the internal resistance R(n) comes during a rich period TR, the controlled internal resistance obtaining means uses, as the controlled internal resistance Rf, a value obtained by correcting the detected internal resistance R(n) on the basis of a latest lean resistance R(k) such that a variation of the internal resistance which stems from the difference between the lean state and the rich state and which is contained in the detected internal resistance R(n) is removed. 1. An oxygen sensor control apparatus for controlling an oxygen sensor which includes a detection element composed of a solid electrolyte body and a heater for heating the detection element , which is sensible to the concentration of oxygen contained in exhaust gas discharged from an internal combustion engine , and which has a characteristic such that its sensor output corresponding to the air-fuel ratio sharply changes around the stoichiometric air-fuel ratio in the course of changing between a rich state and a lean state , the oxygen sensor control apparatus comprising:internal resistance detection means for temporarily changing a voltage between electrodes of the detection element or a current flowing between the electrodes and detecting the internal resistance of the detection element on the basis of the amount of a change in voltage or current which occurs in response to the temporary change;controlled internal resistance obtaining means for obtaining a controlled internal resistance on the basis of the internal resistance; andheater energization control means for ...

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Номер записи: 54
10-10-2013 дата публикации

METHOD FOR DIAGNOSING OPERATION OF A PARTICULATE MATTER SENSOR

Номер: US20130263578A1
Автор: Hopka Michael, Van Nieuwstadt Michiel J.
Принадлежит:

A method for diagnosing a particulate matter sensor is described. In one example, a liquid is purposefully injected into the exhaust system to verify operation of the particulate matter sensor. Reliability of particulate matter diagnostics may be improved by way of the approach, at least during some conditions. 1. A method for diagnosing a particulate matter sensor , comprising:injecting a liquid into an exhaust system before a dewpoint temperature in the exhaust system is exceeded; anddepositing at least some of the liquid on the particulate matter sensor.2. The method of claim 1 , where the liquid is urea.3. The method of claim 1 , where the particulate matter sensor is positioned downstream of a urea injector according to a direction of exhaust flow.4. The method of claim 3 , where the particulate matter sensor is positioned downstream of a SCR claim 3 , and where the SCR is positioned downstream of the urea injector.5. The method of claim 1 , further comprising injecting the liquid at a flow rate depending on a temperature of an exhaust system.6. The method of claim 5 , where flow rate increases as the temperature of the exhaust system approaches a dewpoint temperature.7. The method of claim 1 , further comprising providing an indication of particulate matter sensor degradation in response to a conductance of the particulate matter sensor less than a threshold amount during a period when the liquid is injected to the exhaust system.8. A method for diagnosing a particulate matter sensor claim 1 , comprising:preventing injection of a liquid into an exhaust system when a temperature of the exhaust system is below a first temperature and a second temperature;injecting a liquid into an exhaust system when the temperature of the exhaust system is greater than the first temperature and less than the second temperature; anddepositing at least some of the liquid on the particulate matter sensor.9. The method of claim 8 , where the liquid is urea.10. The method of claim 8 ...

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Номер записи: 55
17-10-2013 дата публикации

Method and device for monitoring the function of an exhaust-gas sensor

Номер: US20130269316A1
Автор: Thomas Steinert
Принадлежит: ROBERT BOSCH GMBH

A method for monitoring the function of an exhaust-gas sensor in the exhaust duct of an internal combustion engine. A first function control of the exhaust-gas sensor takes place in a first operating point of the internal combustion engine, and in the case of an intact exhaust-gas sensor, the output signal of the exhaust gas sensor or a characteristic quantity derived therefrom is determined in at least one second operating point of the internal combustion engine in the case of an intact exhaust-gas sensor and stored as learned value, and the monitoring of the function of the exhaust-gas sensor during a subsequent operation of the internal combustion engine in the second operating point takes place by comparing the output signal of the exhaust-gas sensor or the characteristic quantity derived therefrom, with the learned value. A corresponding device for implementing the method is also described.

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Номер записи: 56
17-10-2013 дата публикации

Method And Device For Operating An Internal Combustion Engine

Номер: US20130269319A1
Автор: Rodatz Paul, Rosenkranz Thorsten, Viehöyer Sebastian
Принадлежит:

An internal combustion engine has an exhaust gas sensor upstream of or in an exhaust gas catalytic converter, and having a measurement signal corresponding to a residual oxygen content of the exhaust gas flowing past the exhaust gas sensor. For operation, an air ratio is specified, a specified forced stimulation is applied thereto, and at least one actuator that influences the mixture is set by appropriately controlling the actuator. In correlation with a rising edge of the forced stimulation, a first maximum value of the air ratio is determined according to the signal profile of the exhaust gas sensor measurement signal during a first measurement duration, and a second maximum value of the air ratio is determined according to the exhaust gas sensor measurement signal during a subsequent second measurement duration. A first sensor characteristic value is determined based on the first and second maximum values. 1. A method for operating an internal combustion engine having an exhaust gas probe arranged in an exhaust system upstream of or in an exhaust gas catalytic converter and having a measurement signal characteristic of a residual oxygen content of the exhaust gas , the method comprising:predefining an excess air ratio, applying predefined forced excitation to the excess air ratio, and setting the excess air ratio by actuating at least one actuator device, predefining a first measuring time period,', 'determining a first maximum value of the excess air ratio, represented by the measurement signal of the exhaust gas probe, as a function of a signal profile of the measurement signal of the exhaust gas probe during the first measuring time period,', 'predefining a second measuring time period is predefined after the first measuring time period, and', 'determining a maximum value of the excess air ratio, represented by the measurement signal of the exhaust gas probe, as a function of a signal profile of the measurement signal of the exhaust gas probe during the ...

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Номер записи: 57
17-10-2013 дата публикации

Method, systems and sensor for detecting humidity

Номер: US20130269322A1
Автор: Dave Charles Weber, Michiel J. Van Nieuwstadt
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods systems and device for detecting humidity in air through use of an ammonia sensor included in the exhaust of an engine, such as a diesel engine are provided. In one example, a method for an engine having an exhaust with an ammonia sensor includes adjusting an operating parameter in response to ambient humidity, the ambient humidity based on a first ammonia sensor reading at a first exhaust air-fuel-ratio and a second ammonia sensor reading at a second exhaust air-fuel-ratio.

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Номер записи: 58
17-10-2013 дата публикации

Particulate matter deposition amount estimation device, exhaust gas purification system, and particulate matter deposition amount estimation method

Номер: US20130269323A1
Автор: Akikazu Miyahara, Hideo Oguri
Принадлежит: KOMATSU LTD

There are provided a differential pressure deposition amount of PM deposited in a DPF based on an exhaust gas flow rate and a differential pressure of the DPF, calculating a model deposition amount of the PM using a model in which a PM amount burned in the DPF is subtracted from the PM amount, calculating a time change rate of the differential pressure deposition amount, and setting a first coefficient to be larger than a second coefficient when the exhaust gas flow rate exceeds a predetermined value and setting the first coefficient to be small when the exhaust gas flow rate exceeds the predetermined value and the time change rate is a predetermined threshold or more when multiplying the differential pressure deposition amount and the model deposition amount by the first and second coefficients, respectively, and calculating an addition value of the respective multiplied values as the PM deposition amount.

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Номер записи: 59
17-10-2013 дата публикации

DPF SYSTEM

Номер: US20130269427A1
Автор: Nagaoka Daiji, Nakada Teruo, Yuza Hiroyuki
Принадлежит:

A diesel particulate filter (“DPF”) system is provided with temperature sensors at an entrance side and an exit side of a diesel oxidation catalyst, an SV ratio determining device that determines an exhaust gas SV ratio by measuring flow rate of exhaust gas during the DPF forcible regeneration, and an injector diagnosing device including a heat-generation region determining unit to which detection values of the temperature sensors and a determination value of the SV ratio determining device are input to determine whether or not these values are within a theoretical heat-generation region, and an actual injection amount diagnosing unit that diagnoses a decrease amount in an actual injection amount of an exhaust pipe injector, when the detection values of the temperature sensors and the determination value of the SV ratio determining device are within the theoretical heat-generation region. 14-. (canceled)5. A DPF system for performing a DPF forcible regeneration that combusts and removes PMs deposited in a DPF by injecting fuel from an exhaust pipe injector and oxidizing and combusting the injected fuel with a DOC , the DPF system comprising:temperature sensors that are provided on an entrance side and an exit side of the DOC to detect a DOC entrance temperature and a DOC exit temperature during the DPF forcible regeneration;a SV ratio determining means that determines an exhaust gas SV ratio by measuring flow rate of exhaust gas during the DPF forcible regeneration; andan injector diagnosing means including:a heat-generation region determining unit to which detection values of the temperature sensors and a determination value of the SV ratio determining means are input to determine whether or not these values are within an theoretical heat-generation region; andan actual injection amount diagnosing unit that diagnoses a decrease amount in an actual injection amount of the exhaust pipe injector, when the detection values of the temperature sensors and the ...

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Номер записи: 60
24-10-2013 дата публикации

Method and device for testing the function capacity of an no oxidation catalyst

Номер: US20130276427A1
Автор: Andreas Doering
Принадлежит: MAN Truck and Bus SE

The invention concerns a method and a device for testing the function capacity of an NO oxidation catalyst ( 5 ) which is used to reduce nitrous oxides (NO x ) contained in the exhaust gas flow of an internal combustion engine ( 1 ) operated with air surplus. In the exhaust gas flow which is supplied to the NO oxidation catalyst ( 5 ), a change is made in the concentration of a reducing agent and the resulting change in NO x concentration in the exhaust gas flow within the NO oxidation catalyst ( 5 ) and/or downstream after the NO oxidation catalyst ( 5 ) is determined and used to test its function capacity.

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Номер записи: 61
24-10-2013 дата публикации

OXYGEN SENSOR AND OXYGEN SENSOR CONTROL DEVICE

Номер: US20130276431A1
Автор: Aoki Keiichiro, Hayashita Go, Sasaki Takanori
Принадлежит: Toyota Jidosha Kashiki Kaisha

In this invention, an EMF oxygen sensor is subjected to an activation process applying unidirectional voltage between an atmosphere electrode and an exhaust electrode thereof. A control device controlling the oxygen sensor in which a voltage was applied with the atmosphere electrode being positive, additionally applies unidirectional voltage between the electrodes to make the atmosphere electrode positive, for example, when the oxygen sensor was used under an environment in which the air-fuel ratio of the internal combustion engine was rich relative to the theoretical air-fuel ratio. Conversely, A control device controlling the oxygen sensor in which a voltage was applied to make the atmosphere electrode negative, additionally applies unidirectional voltage between the electrodes to make the atmosphere electrode negative, for example, when the oxygen sensor was used under an environment in which the air-fuel ratio was lean relative to the theoretical air-fuel ratio. 14-. (canceled)5. The oxygen sensor control device according to claim 11 , further comprising:rich operation continuation time detection means for detecting a continuation time of rich operation that is a time in which an air-fuel ratio is rich relative to a theoretical air-fuel ratio during a predetermined operation period of the internal combustion engine;voltage application time period setting means for setting a voltage application time period in accordance with the continuation time of rich operation, wherein the unidirectional voltage is voltage in a direction to make the atmosphere electrode positive and make the exhaust electrode negative, andwherein the voltage application control means, in accordance with the voltage application time period, applies the voltage between the atmosphere electrode and the exhaust electrode.6. The oxygen sensor control device according to claim 11 , further comprising:lean operation continuation time detection means for detecting a continuation time of lean ...

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Номер записи: 62
31-10-2013 дата публикации

Supercharger-equipped internal combustion engine

Номер: US20130283787A1
Автор: Akihiro Ikeda, Kunihiko Sakata
Принадлежит: Toyota Motor Corp

In a multicylinder internal combustion engine including a turbocharger, the turbocharger employs a twin-entry turbo where a turbine includes two exhaust gas inflow ports. A first exhaust passage guides an exhaust gas discharged from a first cylinder group of the internal combustion engine to one exhaust gas inflow port of the turbocharger. A second exhaust passage guides an exhaust gas discharged from a second cylinder group of the internal combustion engine to the other exhaust gas inflow port of the turbocharger. An exhaust gas collecting portion of the first exhaust passage and an exhaust gas collecting portion of the second exhaust passage each include an air-fuel ratio sensor. This configuration allows efficiently contact of the exhaust gas on an element portion of the air-fuel ratio sensor, thus accurately detecting an air-fuel ratio of the exhaust gas at an upstream side of a catalyst for each cylinder.

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Номер записи: 63
07-11-2013 дата публикации

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Номер: US20130291521A1
Автор: Sasaki Takanori
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

In a control device for an internal combustion engine including an air-fuel ratio sensor that includes a catalyst layer that covers an exhaust gas-side electrode, an oxygen storage capacity of the catalyst layer is acquired based on a sensor output of the air-fuel ratio sensor. The sensor output is corrected if the oxygen storage capacity is higher than a predetermined value and the sensor output is in a predetermined range in the vicinity of the theoretical air-fuel ratio. Preferably, the oxygen storage capacity is calculated by integrating the product of a deviation amount ΔA/F of the sensor output with respect to the theoretical air-fuel ratio and a dwell time thereof. A correction period in which a correction operation is performed is set based on the oxygen storage capacity. 1. A control device for an internal combustion engine , comprising:an exhaust gas sensor that is arranged in an exhaust passage of an internal combustion engine, and includes a sensor element comprising a solid electrolyte in which an atmosphere-side electrode is formed on one side surface and an exhaust gas-side electrode is formed on another side surface, and a catalyst layer that covers the exhaust gas-side electrode;oxygen storage capacity acquisition means that, based on a sensor output of the exhaust gas sensor, acquires an oxygen storage capacity that represents a capacity of the catalyst layer to store or release oxygen; andcorrection means that, when the oxygen storage capacity is higher than a predetermined value and the sensor output is in a predetermined range in a vicinity of a theoretical air-fuel ratio, executes a correction operation that corrects the sensor output.2. The control device for an internal combustion engine according to claim 1 , wherein claim 1 , as the oxygen storage capacity claim 1 , the oxygen storage capacity acquisition means acquires a value obtained by integrating a product of a deviation amount of the sensor output with respect to a theoretical air- ...

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Номер записи: 64
07-11-2013 дата публикации

FAILURE DETECTION APPARATUS FOR AN ELECTRICALLY HEATED CATALYST

Номер: US20130291630A1
Автор: Takagi Naoya, Watanabe Takashi, Yoshioka Mamoru
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

Whether or not an electrically heated catalyst is normal is detected by accurately detecting whether the temperature of the electrically heated catalyst has gone up. To this end, provision is made for an air fuel ratio control device that adjusts an air fuel ratio of an exhaust gas flowing into the electrically heated catalyst to a rich air fuel ratio, at the time of starting of an internal combustion engine, a downstream side detection device that is arranged at the downstream side of the electrically heated catalyst and detects a concentration of oxygen in the exhaust gas, and a determination device that determines whether the electrically heated catalyst is electrically energized, based on the time at which the oxygen concentration detected by the downstream side detection device changes to a value indicating a rich air fuel ratio at the time when the air fuel ratio of the exhaust gas is adjusted by the air fuel ratio control device to the rich air fuel ratio, after starting of the internal combustion engine.

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Номер записи: 65
07-11-2013 дата публикации

Method for Diagnosing an Exhaust Gas Catalytic Converter and/or an Exhaust Gas Sensor of a Motor Vehicle Internal Combustion Engine

Номер: US20130297192A1
Автор: Imeroski Bajram
Принадлежит: DAIMLER AG

A method for diagnosing an exhaust gas catalytic convertor and/or an exhaust gas sensor arranged downstream and/or upstream of the exhaust gas catalytic convertor in an exhaust gas system of a motor vehicle internal combustion engine. The internal combustion engine is operated with an air/fuel mixture having a substoichiometric air/fuel ratio. The internal combustion engine is switched off and an unfired towed operation with disabled fuel supply is performed in which air drawn in by the internal combustion engine is conveyed through the exhaust gas system to the exhaust gas catalytic convertor and exhaust gas sensor. The internal combustion engine is then operated with a substoichiometric air/fuel ratio and a signal of the exhaust gas sensor is evaluated with regard to a predefinable evaluation criterion, the signal being provided at least in a period of time between switch-off and the subsequent self-running of the internal combustion engine. 114-. (canceled)15. A method for diagnosing an exhaust gas catalytic convertor or an exhaust gas sensor , which is arranged downstream or upstream of the exhaust gas catalytic convertor , in an exhaust gas system of a motor vehicle internal combustion engine , the method comprising:a. operating the internal combustion engine with an air/fuel mixture having a substoichiometric air/fuel ratio;b. switching the internal combustion engine off;c. once the internal combustion engine has been stopped, carrying out unfired towed operation with a disabled fuel supply, wherein air drawn in by the internal combustion engine is conveyed through the exhaust gas system to the exhaust gas catalytic convertor and the exhaust gas sensor;d. starting self-running of the internal combustion engine with fired operation and a substoichiometric air/fuel ratio; ande. evaluating a signal of the exhaust gas sensor with regard to a predefinable evaluation criterion, wherein the signal is provided at least in a period of time between switch-off and the ...

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Номер записи: 66
14-11-2013 дата публикации

Controller of internal combustion engine

Номер: US20130298535A1
Автор: Keiichiro Aoki
Принадлежит: Toyota Motor Corp

Disclosed is a method for correcting characteristic variation of a PM sensor and improving detection accuracy of the sensor. The PM sensor has a pair of electrodes for capturing the PM in an exhaust gas, and a sensor output changes in accordance with a captured amount of the PM. If the sensor output gets close to a saturated state, the PM combustion control for combusting and removing the PM is executed. If a zero-point output of the PM sensor is to be corrected, first, a sensor output at a point of time when predetermined time required for combustion of the PM has elapsed after electrical conduction to the heater is started by the PM combustion control is obtained. Then, the sensor output at an arbitrary point of time is corrected. As a result, correction of the sensor can be made smoothly by using existing PM combustion control.

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Номер записи: 67
14-11-2013 дата публикации

Service test for exhaust gas treatment system

Номер: US20130298655A1
Автор: Janean E. Kowalkowski, John Coppola
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A service procedure to test the SCR device involves turning on an upstream and downstream SCR NOx sensor, turning off an NH 3 injector, running the engine until enough upstream NOx mass has been generated by the engine to deplete any NH 3 load remaining in the SCR device, determining the operational status of the NOx sensors as follows: if 1−downstream NOx ppm/upstream NOx ppm=approx. 0; then the downstream NOx sensor is reading the same as the upstream NOx sensor and the downstream NOx sensor is determined to be good and the SCR device may have to be replaced; and if 1−downstream NOx ppm/upstream NOx ppm>approx. 0; then the downstream NOx sensor is reading high and the downstream NOx sensor is determined to be bad and downstream NOx sensor may have to be replaced.

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Номер записи: 68
21-11-2013 дата публикации

APPARATUS FOR DIAGNOSING CAUSES OF NOX CONVERSION EFFICIENCY DEGRADATION

Номер: US20130306171A1
Автор: Nagaoka Daiji, Nakada Teruo
Принадлежит: Isuzu Motors Limited

An apparatus for on-board diagnoses of causes of NOconversion efficiency degradation including: a diagnosis exhaust-pipe fuel injection control unit; a NOpurification device failure specifying unit; and an oxidizing catalyst device failure specifying unit. 1. An apparatus for diagnosing causes of NOconversion efficiency degradation applied to an engine system having an exhaust pipe fuel injection , an oxidizing catalyst device , and a NOpurification device , comprising:{'sub': 'x', 'a diagnosis exhaust-pipe fuel injection control unit that performs control such that exhaust-pipe fuel injection is performed for diagnosis purposes when a NOconversion efficiency is degraded;'}{'sub': x', 'x', 'x, 'a NOpurification device failure specifying unit that specifies a cause of NOconversion efficiency degradation as a NOpurification device failure if a difference between an actual heat generation amount and a theoretical heat generation amount in the oxidizing catalyst device at the time of the exhaust-pipe fuel injection is within a threshold value; and'}{'sub': 'x', 'an oxidizing catalyst device failure specifying unit that specifies a cause of NOconversion efficiency degradation as an oxidizing catalyst device failure if a difference between an actual heat generation amount and a theoretical heat generation amount in the oxidizing catalyst device at the time of the exhaust-pipe fuel injection exceeds a threshold value.'}2. The apparatus for diagnosing causes of NOconversion efficiency degradation according to claim 1 , further comprising a composite failure specifying unit that specifies a cause of NOconversion efficiency degradation as an oxidizing catalyst device failure and a NOpurification device failure if a difference between the actual heat generation amount and the theoretical heat generation amount in the oxidizing catalyst device at the time of exhaust-pipe fuel injection exceeds a threshold value claim 1 , and a difference between the actual heat generation ...

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Номер записи: 69
05-12-2013 дата публикации

SOOT SENSOR FUNCTIONAL CAPABILITY MONITORING

Номер: US20130318948A1
Автор: Van Marion Willem
Принадлежит: DELPHI TECHNOLOGIES HOLDING, S.à.r.l.

A method of monitoring functional capability of a soot sensor that is responsive to deposition of soot from an exhaust gas stream on a sensor surface comprises acquiring a measurement signal of the soot sensor and running a plausibility check, in which it is ascertained whether the measurement signal agrees with an expected finding. According to the invention it is detected whether conditions are present, on which liquid, e.g. water, from the exhaust gas stream condensates on the sensor surface. Additionally or alternatively, such conditions are produced. The plausibility check then includes ascertaining whether the measurement signal reflects the condensation of liquid. The detection of presence of conditions for condensation comprises a measurement or an estimation of temperature on the sensor surface. 1. A method of monitoring functional capability of a soot sensor responsive to deposition of soot from an exhaust gas stream on a sensor surface , said method comprising:detecting the presence of conditions for condensation of a liquid from said exhaust gas stream on said sensor surface, and if said conditions are present;acquiring a measurement signal of said soot sensor;running a plausibility check wherein it is ascertained whether said measurement signal agrees with an expected finding;wherein said detection of presence of conditions for condensation comprises measuring or estimating the temperature on said sensor surface, and wherein said method does not include the additional step of subjecting the sensor to conditions sufficient to evaporate any condensate and performing any subsequent diagnosis.2. The method as claimed in claim 1 , wherein said detection of presence of conditions for condensation comprises an estimation of temperature on said sensor surface based ona) a temperature measurement at another location of the exhaust system and a mathematical model describing thermal properties of the exhaust system orb) engine parameters used as input parameters ...

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Номер записи: 70
19-12-2013 дата публикации

METHOD AND DEVICE FOR CARRYING OUT A ZERO POINT ADAPTATION OF A LAMBDA PROBE OF AN INTERNAL COMBUSTION ENGINE

Номер: US20130338902A1
Автор: Bader Dirk
Принадлежит: ROBERT BOSCH GMBH

The invention relates to a method for carrying out a zero point adaptation of a lambda probe () in an exhaust gas discharge section () of an internal combustion engine (), wherein fresh air is pumped, during an after-run period following a deactivation of the internal combustion engine (), from an air supply system () into the exhaust gas discharge section () such that fresh air flows around the lambda probe (). 1. A method for carrying out a zero point adaptation of a lambda probe in an exhaust-gas discharge section of an internal combustion engine , wherein , during an after-run phase after a shut-down of the internal combustion engine , fresh air is pumped from an air supply system into the exhaust-gas discharge section , such that the lambda probe is immersed in fresh air.2. The method as claimed in claim 1 , wherein the after-run phase follows a time point at which the internal combustion engine comes to a complete standstill.3. The method as claimed in claim 1 , wherein the duration of the after-run phase is limited in terms of time and lasts at least until the lambda probe has been immersed in fresh air.4. The method as claimed in claim 1 , wherein a zero point adaptation of the lambda probe is carried out when the lambda probe has been immersed in fresh air.5. An engine system comprising:an internal combustion engine to which fresh air can be supplied via an air supply system and from which combustion exhaust gas can be discharged via an exhaust-gas discharge section;a lambda probe which is arranged in the exhaust-gas discharge section;a pump for pumping fresh air from the air supply system to the exhaust-gas discharge section;a control unit for activating the pump, during an after-run phase after a shut-down of the internal combustion engine, in order to pump fresh air into the exhaust-gas discharge section such that the lambda probe is immersed in fresh air.6. The engine system as claimed in claim 5 , wherein the pump is arranged in a line which connects ...

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Номер записи: 71
26-12-2013 дата публикации

PARTICULATE MATTER PROCESSING APPARATUS (AS AMENDED)

Номер: US20130340415A1
Автор: Mitani Shinichi, Murase Eiji, Nomura Hiroshi
Принадлежит:

An excessively large electric current is suppressed from flowing to an electrode. A particulate matter processing apparatus in which a processing part with an electrode installed therein is arranged in an exhaust passage of an internal combustion engine, wherein particulate matter is caused to aggregate by generating a potential difference between the electrode and the processing part, is provided with a power supply that is connected to the electrode and applies a voltage thereto, a current detection device that detects an electric current which passes through the electrode, an air fuel ratio detection device that detects or estimates an air fuel ratio of an exhaust gas which flows through the exhaust passage, and a voltage control device that makes the voltage applied to the electrode from the power supply smaller in cases where the air fuel ratio detected by the air fuel ratio detection device is a rich air fuel ratio, than in cases where it is a stoichiometric air fuel ratio or a lean air fuel ratio. 1. A particulate matter processing apparatus in which a processing part with an electrode installed therein is arranged in an exhaust passage of an internal combustion engine , wherein particulate matter is caused to aggregate by generating a potential difference between the electrode and the processing part , said apparatus comprising:a power supply that is connected to said electrode and applies a voltage thereto;a current detection device that detects an electric current which passes through said electrode;an air fuel ratio detection device that detects or estimates an air fuel ratio of an exhaust gas which flows through said exhaust passage; anda voltage control device that makes the voltage applied to said electrode from said power supply smaller in cases where the air fuel ratio detected or estimated by said air fuel ratio detection device is a rich air fuel ratio, than in cases where it is a stoichiometric air fuel ratio or a lean air fuel ratio.2. The ...

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Номер записи: 72
02-01-2014 дата публикации

Particulate matter processing apparatus

Номер: US20140000248A1
Автор: Eiji Murase, Hiroshi Nomura, Shinichi Mitani
Принадлежит: Toyota Motor Corp

A concentration of HC in an exhaust gas is estimated with a high degree of accuracy by making use of a particulate matter processing apparatus ( 1 ). In the particulate matter processing apparatus ( 1 ) in which a processing part ( 3 ) with an electrode ( 5 ) installed therein is arranged in an exhaust passage ( 2 ) of an internal combustion engine, wherein particulate matter is caused to aggregate by generating a potential difference between the electrode ( 5 ) and the processing part ( 3 ), provision is made for a power supply ( 6 ) that is connected to the electrode ( 5 ) and applies a voltage thereto, an insulation part ( 4 ) that insulates electricity between the processing part ( 3 ) and the exhaust passage ( 2 ), and a ground part ( 53 ) that grounds the processing part ( 3 ), a detection device ( 9 ) that detects an electric current in the ground part ( 53 ), and an estimation device ( 7 ) that estimates a concentration of HC in an exhaust gas based on the electric current detected by the detection device ( 9 ) at the time when the voltage is applied to the electrode ( 5 ) by means of the power supply ( 6 ).

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Номер записи: 73
02-01-2014 дата публикации

SYSTEM FOR SENSING SOOT OF DIESEL VEHICLE

Номер: US20140000354A1
Автор: LIM Cheol Beom
Принадлежит: HYUNDAI MOTOR COMPANY

A system for sensing soot of a diesel engine includes a combustion element which is a porous ceramic structure and to which a catalytic substance that is combustion-reacted with the soot is fixed, a comparison element which is the porous ceramic structure and to which a stable substance that is not combustion-reacted with the soot, and a detection section for detecting the temperatures of the combustion element and the comparison element and for deducing the soot formation amount among exhaust gas by using the temperature difference of the respective element. 1. A system for sensing soot of a diesel engine , comprising: a combustion element including a porous ceramic structure to which a catalytic substance that combustion-reacts with the soot is fixed; a comparison element including the porous ceramic structure to which a stable substance that does not combustion-react with the soot is fixed; anda detection section for detecting the temperatures of the combustion element and the comparison element and for deducing the soot formation amount among exhaust gas by using the temperature difference of the respective element.2. The system for sensing soot of a diesel engine of claim 1 , wherein the ceramic structure comprises Al2O3.3. The system for sensing soot of a diesel engine of claim 1 , wherein the ceramic structure comprises SiO2.4. The system for sensing soot of a diesel engine of claim 1 , wherein the stable substance consists mainly of TiO2.5. The system for sensing soot of a diesel engine of claim 1 , wherein the catalytic substance uses TiO2 as a support and consists of a fixed element that is combustion-reacted with the soot.6. The system for sensing soot of a diesel engine of claim 1 , further comprising a heating section for heating the combustion element so that the catalytic substance is combustion-reacted with the soot among exhaust gas.7. The system for sensing soot of a diesel engine of claim 6 , wherein the heating section heats equally the ...

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Номер записи: 74
02-01-2014 дата публикации

Sensor for measuring sof of diesel vehicle

Номер: US20140004007A1
Автор: Cheol Beom Lim
Принадлежит: Hyundai Motor Co

A sensor device for measuring SOF (Soluble Organic Fraction) of a diesel engine, may include an exothermic catalyst including a TiO 2 support impregnated with platinum (Pt) and causing a combustion reaction of the SOF to generate heat, a comparative catalyst including a TiO 2 support and not causing a combustion reaction of the SOF, and a measuring unit determining a discharge amount of the SOF using a temperature difference between the exothermic catalyst and the comparative catalyst.

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Номер записи: 75
09-01-2014 дата публикации

CATALYTIC CONVERTER WARM-UP CONTROL APPARATUS FOR HYBRID VEHICLE

Номер: US20140007561A1
Автор: HABU Ikue, SHIKAMA Mahito
Принадлежит:

A catalytic converter warm-up control apparatus for a hybrid vehicle includes a catalytic converter warm-up controller, a temperature parameter acquisition device, a warm-up control parameter setting device, and a motoring execution device. The catalytic converter warm-up controller is configured to execute warm-up control to warm up a catalytic converter of the hybrid vehicle for activating the catalytic converter upon start-up of an internal combustion engine provided in the hybrid vehicle. The warm-up control parameter setting device is configured to set warm-up control parameters used in the warm-up control in accordance with the temperature parameter acquired by the temperature parameter acquisition device. The motoring execution device is configured to execute motoring of the internal combustion engine by a first electric motor in a predetermined operation state. The catalytic converter warm-up controller is configured to execute the warm-up control in accordance with an execution state of the motoring. 1. A catalytic converter warm-up control apparatus for a hybrid vehicle , comprising:a catalytic converter warm-up controller configured to execute warm-up control to warm up a catalytic converter of the hybrid vehicle for activating the catalytic converter upon start-up of an internal combustion engine provided in the hybrid vehicle, the catalytic converter being provided to purify an exhaust gas discharged from the internal combustion engine;a temperature parameter acquisition device configured to acquire a temperature parameter indicating a temperature of the internal combustion engine;a warm-up control parameter setting device configured to set warm-up control parameters used in the warm-up control in accordance with the temperature parameter acquired by the temperature parameter acquisition device; anda motoring execution device configured to execute motoring of the internal combustion engine by a first electric motor in a predetermined operation state, ...

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Номер записи: 76
09-01-2014 дата публикации

Particulate matter processing apparatus

Номер: US20140007650A1
Автор: Eiji Murase, Hiroshi Nomura, Shinichi Mitani
Принадлежит: Toyota Motor Corp

An amount of aggregation of particulate matter is estimated with a high degree of accuracy. A particulate matter processing apparatus in which a processing part with an electrode installed therein is arranged in an exhaust passage of an internal combustion engine, wherein particulate matter is caused to aggregate by generating a potential difference between the electrode and the processing part, is provided with a power supply that is connected to the electrode and applies a voltage thereto, a current detection device that detects an electric current which passes through the electrode, an estimation device that estimates an amount of aggregation of the particulate matter based on the electric current detected at the time when the voltage is applied to the electrode, an air fuel ratio detection device that detects or estimates an air fuel ratio of an exhaust gas which flows through the exhaust passage, and a prohibition device which prohibits an estimation by the estimation device in the case of a rich air fuel ratio.

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Номер записи: 77
09-01-2014 дата публикации

High-temperature sensor for arrangement in a metal tube, especially inside the exhaust gas system of an internal combustion engine

Номер: US20140010261A1
Автор: Thomas Niemann, Torsten Eggers
Принадлежит: Hella KGaA Huek and Co

The invention relates to a high-temperature sensor comprising contact wires in a metal tube, preferably a bent metal tube for arrangement especially inside the exhaust gas system of an internal combustion engine, and spacer bodies distributed in rows along the contact wires so as to maintain the contact wires at a predetermined distance to the inner wall of the metal tube. According to the invention, every spacer body is approximately ovoid, the diameter of the center portion of the egg being not wider than the inside width of the as yet unbent metal tube. The spacer bodies are injection-molded polymer ceramic parts molded onto the contact wires.

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Номер записи: 78
23-01-2014 дата публикации

Control apparatus and control method for internal combustion engine

Номер: US20140020363A1
Автор: Toshitake Sasaki
Принадлежит: Toyota Motor Corp

An engine ECU diagnoses the presence or absence of abnormality during execution of the fuel cut. The engine ECU is configured to restrict the fuel cut according to the temperature of a catalyst when the temperature is higher than a fuel-cut-restriction temperature of the catalyst. The engine ECU is configured to set the fuel-cut-restriction temperature is lower when the diagnosis has been completed than when the diagnosis has not been completed. Furthermore, the engine ECU continues the fuel cut if the diagnosis is completed during execution of the fuel cut while the temperature of the catalyst is between the fuel-cut-restriction temperature set prior to the completion of the diagnosis and the fuel-cut-restriction temperature set after the completion of the diagnosis.

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Номер записи: 79
23-01-2014 дата публикации

VEHICLE HAVING SYSTEM AND METHOD OF DIAGNOSING SECONDARY AIR INJECTION APPARATUS

Номер: US20140020367A1
Автор: Kim Seungbum
Принадлежит:

A system and a method of diagnosing a secondary air injection apparatus may include an intake line supplying air to an engine, an exhaust line exhausting exhaust gas, a secondary air injection (SAI) line branching off at a branch point of the intake line and being joined to the exhaust line at a joining point of the exhaust line, a first pressure sensor mounted at the intake line to detect pressure or amount of intake air flowing through the intake line, a catalytic converter, a first oxygen sensor mounted at the exhaust line, an SAI pump mounted at the SAI line and pumping the air flowing through the intake line to the SAI line, an SAI valve mounted at the SAI line and selectively communicating the SAI line with the exhaust line, and a control portion controlling the SAI pump and the SAI valve to perform catalyst heating. 1. A vehicle having a system of diagnosing a secondary air injection apparatus , comprising:an engine generating power by burning air/fuel mixture;an intake line supplying air to the engine;an exhaust line exhausting exhaust gas produced at the engine to the exterior of the vehicle;a secondary air injection (SAI) line branching off at a branch point of the intake line and being joined to the exhaust line at a joining point of the exhaust line;a first pressure sensor mounted at the intake line and detecting pressure or amount of intake air flowing through the intake line;a catalytic converter mounted at the exhaust line and removing noxious material contained in the exhaust gas;a first oxygen sensor mounted at the exhaust line between the joining point and the catalytic converter and detecting air/fuel ratio in the exhaust line;an SAI pump mounted at the SAI line and pumping the air flowing through the intake line to the SAI line;an SAI valve mounted at the SAI line and selectively communicating the SAI line with the exhaust line; anda control portion controlling the SAI pump and the SAI valve so as to perform catalyst heating,wherein the control ...

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Номер записи: 80
30-01-2014 дата публикации

Method for model-based determination of a temperature distribution of an exhaust gas post-treatment unit

Номер: US20140032189A1
Автор: Guido Schäffner, Holger Sinzenich, Jens Niemeyer, Jörg Remele, Marc Hehle, Ralf Müller, Tim Späder
Принадлежит: MTU Friedrichshafen GmbH

In a method for a model-based determination of a temperature distribution of an exhaust gas post-treatment unit, a differentiation is made between steady operating states and non-steady operating states by taking into account the axial and the radial temperature distribution, and, on the basis of virtual segmentation of the post-treatment unit, in particular the radial heat transfer to the surroundings is taken into account in the model-based determination for steady operating states, and for non-steady operating states the heat transfer from the exhaust gas which flows axially through the post-treatment unit to the segments is taken into account by a heat transfer coefficient k.

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Номер записи: 81
06-02-2014 дата публикации

System and method for diagnosing a fault in an oxygen sensor based on engine speed

Номер: US20140033812A1
Автор: John W. Siekkinen, Scott Jeffrey, Stephen Paul Levijoki, Thomas J. MAJCHER
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A system according to the principles of the present disclosure includes an error count module and a sensor diagnostic module. The error count module increases an error count when an actual air/fuel ratio is different from a desired air/fuel ratio and selectively adjusts the error count based on an actual engine speed. An oxygen sensor generates a signal indicating the actual air/fuel ratio. The sensor diagnostic module diagnoses a fault in the oxygen sensor when the error count is greater than a first predetermined count.

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Номер записи: 82
06-02-2014 дата публикации

EXHAUST GAS DILUTION DEVICE AND PM MEASUREMENT SYSTEM

Номер: US20140036617A1
Автор: KUMAGAI Tatsuki
Принадлежит: HORIBA, LTD.

The present invention is one that, in measurement of exhaust gases respectively discharged from a first engine and a second engine, reduce a PM measurement error caused by sharing a dilution tunnel, and has: a dilution tunnel for diluting exhaust gas from an engine with dilution air; a diesel exhaust gas introduction path that introduces diesel exhaust gas from a diesel engine DE into the dilution tunnel; and a gasoline exhaust gas introduction path that introduces diluted gasoline exhaust gas from a gasoline engine GE into the dilution tunnel, wherein: the dilution tunnel has a gas mixing part that mixes the diesel exhaust gas introduced by the diesel exhaust gas introduction path and the dilution air with each other; and the gasoline exhaust gas introduction path introduces the gasoline exhaust gas into an upstream side of the gas mixing part in the dilution tunnel. 1. An exhaust gas dilution device comprising:a dilution tunnel that is configured to be supplied with dilution air and intended to dilute exhaust gas from an engine;a first exhaust gas introduction path that is configured to introduce first exhaust gas discharged from a first engine into the dilution tunnel; anda second diluted exhaust gas introduction path that is configured to introduce second diluted exhaust gas into the dilution tunnel, the second diluted exhaust gas being gas resulting from dilution of second exhaust gas discharged from a second engine, wherein:the dilution tunnel has a gas mixing part that is configured to mix the first exhaust gas introduced by the first exhaust gas introduction path and the dilution air with each other; andthe second diluted exhaust gas introduction path is configured to introduce the second diluted exhaust gas into an upstream side of the gas mixing part in the dilution tunnel.2. The exhaust gas dilution device according to claim 1 , whereinthe first exhaust gas introduction path and the second diluted exhaust gas introduction path join together in the ...

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Номер записи: 83
06-03-2014 дата публикации

DETERIORATION DIAGNOSIS DEVICE FOR OXIDATION CATALYST

Номер: US20140060012A1
Автор: KAKIMOTO Shiro
Принадлежит: NGK SPARK PLUG CO., LTD.

A deterioration diagnosis device for an oxidation catalyst includes: a multi-gas sensor disposed in an exhaust passage downstream of an oxidation catalyst, the multi-gas sensor including a NOsensor unit and a NOsensor unit, the NOsensor unit directly detecting a NOconcentration in exhaust gas after passing through the oxidation catalyst, and the NOsensor unit directly detecting a NOconcentration in the exhaust gas; an NO concentration calculation unit configured to calculate an NO concentration in the exhaust gas after passing through the oxidation catalyst based on the NOconcentration and the NOconcentration; and a deterioration judgment unit configured to determine a deterioration degree of the oxidation catalyst from an evaluation value based on the NO concentration calculated by the NO concentration calculation unit. 1. A deterioration diagnosis device for determining a deterioration degree of an oxidation catalyst disposed in an exhaust passage of an internal combustion engine , the deterioration diagnosis device comprising:{'sub': 2', 'X', '2', '2', 'X', 'X, 'a multi-gas sensor disposed downstream of the oxidation catalyst, the multi-gas sensor including a multi-gas sensor element unit that integrally includes a NOsensor unit and a NOsensor unit, the NOsensor unit directly detecting a NOconcentration in exhaust gas after passing through the oxidation catalyst, and the NOsensor unit directly detecting a NOconcentration in the exhaust gas;'}{'sub': 2', 'X, 'an NO concentration calculation unit configured to calculate an NO concentration in the exhaust gas after passing through the oxidation catalyst based on the NOconcentration and the NOconcentration; and'}a deterioration judgment unit configured to determine a deterioration degree of the oxidation catalyst from an evaluation value based on the NO concentration calculated by the NO concentration calculation unit.2. The deterioration diagnosis device for oxidation catalyst as claimed in claim 1 , whereinthe ...

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Номер записи: 84
13-03-2014 дата публикации

Differential pressure-based enablement of a particulate filter diagnostic

Номер: US20140069081A1
Автор: Benjamin Radke, Janean E. Kowalkowski, Vincent J. Tylutki
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A vehicle includes an engine, an exhaust system having a particulate filter which removes soot from the exhaust stream, a sensor, and a controller. The sensor measures instantaneous differential pressure across the filter. The controller executes a method to selectively enable or disable execution of an efficiency diagnostic of the filter as a function of a learned differential pressure offset value. The controller may also compare the differential pressure to a calibrated threshold and execute a control action when the differential pressure falls within an allowable range of the threshold. This may include applying the differential pressure offset value and enabling execution of the diagnostic using measurements from the zeroed sensor. Another control action may be executed when the measured differential pressure is not within the allowable range of the threshold, including disabling the execution of the diagnostic and setting a diagnostic code indicating that the sensor may be faulty.

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Номер записи: 85
03-04-2014 дата публикации

HEATER CONTROL DEVICE OF OXYGEN CONCENTRATION SENSOR

Номер: US20140090363A1
Автор: NOGUCHI Ken, Takeda Keiichi
Принадлежит: BOSCH CORPORATION

A heater control device of an oxygen concentration sensor is provided in which even in a case where an internal combustion engine is automatically stopped by idle stop control after cold start-up, it is possible to start energization of a heater at an appropriate time. 1. A heater control device of an oxygen concentration sensor , which is provided in an exhaust pipe of an internal combustion engine capable of executing idle stop control to automatically stop the internal combustion engine during temporary stop of a vehicle and includes a sensor element that detects oxygen concentration in exhaust gas and a heater that heats the sensor element , the heater control device controlling energization of the heater in the oxygen concentration sensor and comprising:a model temperature calculator that calculates model temperature of an installation position of the oxygen concentration sensor;a heat amount integrator that calculates an integrated heat amount by integrating the amount of heat passing through the installation position of the oxygen concentration sensor;an energization instructor that starts the energization of the heater when the integrated heat amount has reached a predetermined energization start threshold value;a resetter that resets the integrated heat amount and the energization start threshold value at the time of stop or the time of start-up of the internal combustion engine and, on the other hand, does not reset the integrated heat amount and the energization start threshold value at the time of automatic stop and the time of restart of the internal combustion engine by the idle stop control; anda corrector that corrects a parameter in consideration of the influence of heat radiation during the automatic stop of the internal combustion engine by the idle stop control.2. The heater control device of an oxygen concentration sensor according to claim 1 , wherein the heat amount integrator starts integration of the amount of heat when the model temperature ...

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Номер записи: 86
10-04-2014 дата публикации

Method And Device For Operating An SCR System

Номер: US20140096511A1
Автор: Denny SCHÄDLICH, Philippe Grass
Принадлежит: Continental Automotive GmbH

A method for operating a selective catalytic reduction (SCR) system having a urea solution supply and an ultrasound based urea concentration sensor, the measurement signal of the urea concentration sensor being representative of a propagation time of an ultrasonic pulse along a predefined path length in a fluid of the urea solution supply includes: heating at least the fluid in a detection region of the urea concentration sensor from a predefined first temperature to a predefined second temperature; during the heating, detecting the measurement signal at at least a third and fourth temperature, and in each case determining a raw concentration characteristic value as a function of the respective measurement signal, which raw concentration characteristic value is representative of the propagation time of the ultrasonic pulse; and determining a concentration characteristic value, representative of a concentration of urea in the fluid, as a function of the raw concentration characteristic values.

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Номер записи: 87
01-01-2015 дата публикации

Exhaust Aftertreatment Sensor Assembly

Номер: US20150000389A1
Автор: "OConnor Shane", Butler Eric R., Nowicki Robert W., Patpatia Harpreet, Runde William J., Srinivas Shashidhar, Welp Michael J.
Принадлежит:

An exhaust aftertreatment system includes an exhaust aftertreatment component housing and a sensor table coupled to an exterior surface of the exhaust aftertreatment component housing. The sensor table includes a base including footings and a first platform offset from the footings by first standoffs so to define a first air gap. The base also includes second standoffs extending from the first platform. The sensor table also includes a top plate including a second platform and third standoffs extending from the second platform. The second platform is fixedly coupled to the second standoffs so to define a second air gap between the first platform and the second platform. The sensor table further includes a first sensor module coupled to the third standoffs so to define a third air gap between the second platform and the first sensor module. 1. An exhaust aftertreatment system , comprising:an exhaust aftertreatment component housing; and a base including footings and a first platform offset from the footings by first standoffs so to define a first air gap, the base further including second standoffs extending from the first platform,', 'a top plate including a second platform and third standoffs extending from the second platform, the second platform fixedly coupled to the second standoffs so to define a second air gap between the first platform and the second platform, and', 'a first sensor module coupled to the third standoffs so to define a third air gap between the second platform and the first sensor module., 'a sensor table coupled to an exterior surface of the exhaust aftertreatment component housing, the sensor table comprising2. The exhaust aftertreatment system of claim 1 , wherein the top plate defines a plurality of apertures spaced so as to align with the second standoffs.3. The exhaust aftertreatment system of claim 2 , wherein the second standoffs are spot welded to the top plate via the plurality of apertures.4. The exhaust aftertreatment system of ...

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Номер записи: 88
01-01-2015 дата публикации

PLUG FOR SEALING A HOUSING OF AN EXHAUST GAS SENSOR, EXHAUST GAS SENSOR AND MANUFACTURE OF AN EXHAUST GAS SENSOR

Номер: US20150001813A1
Автор: RATTAY Bernd, Schneider Jens, Stanglmeier Frank
Принадлежит: ROBERT BOSCH GMBH

A plug for sealing a housing of an exhaust gas sensor, the plug having at least one axial through-channel for leading through a connecting cable, the plug having a main body which includes polytetrafluoroethylene, the plug further including at least one outer seal which is situated on the plug radially on the outside, the outer seal including at least one perfluoroalkoxy polymer or tetrafluoroethylene-perfluoropropylene or polychlorotrifluoroethylene or polyvinylidene fluoride. 114-. (canceled)15. A plug for sealing a housing of an exhaust gas sensor , comprising:at least one axial through-channel for leading through a connecting cable;a main body which includes polytetrafluoroethylene;at least one outer seal situated on the plug radially on the outside, wherein the outer seal includes at least one of perfluoroalkoxy polymer, tetrafluoroethylene-perfluoropropylene, polychlorotrifluoroethylene, and polyvinylidene fluoride.16. The plug of claim 15 , wherein the main body is integrally joined with the outer seal.17. The plug of claim 15 , wherein the outer seal is situated on the main body in the form of a layer having a layer thickness of 10 μm to 1 mm.18. An exhaust gas sensor claim 15 , comprising: at least one axial through-channel for leading through a connecting cable;', 'a main body which includes polytetrafluoroethylene;', 'at least one outer seal situated on the plug radially on the outside, wherein the outer seal includes at least one of perfluoroalkoxy polymer, tetrafluoroethylene-perfluoropropylene, polychlorotrifluoroethylene, and polyvinylidene fluoride;, 'a plug for sealing a housing of the exhaust gas sensor, includinga housing; andat least one connecting cable, which is led through the through-channel of the plug, wherein the housing of the exhaust gas sensor is sealed by the plug.19. The exhaust gas sensor of claim 18 , wherein the housing of the exhaust gas sensor is indirectly integrally joined with the plug via the outer seal.20. The exhaust gas ...

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Номер записи: 89
05-01-2017 дата публикации

APPARATUS AND METHOD FOR CONTROLLING NITROGEN OXIDE SENSOR OF HYBRID VEHICLE

Номер: US20170002708A1
Автор: JIN Jeong Sik
Принадлежит:

A method of controlling a nitrogen oxide sensor of a hybrid vehicle includes: determining whether starting of a vehicle is turned on according to a manipulation of a starting switch; determining whether an engine is operating; determining whether a control condition of a nitrogen oxide sensor is satisfied; and measuring, if an engine is operating and if a control condition of a nitrogen oxide sensor is satisfied, a concentration of nitrogen oxide that is included in an exhaust gas by heating the nitrogen oxide sensor. 1. A method of controlling a nitrogen oxide sensor of a hybrid vehicle , the method comprising:determining whether starting of a vehicle is turned on according to a manipulation of a starting switch;determining whether an engine is operating;determining whether a control condition of a nitrogen oxide sensor is satisfied; andmeasuring, a concentration of nitrogen oxide in an exhaust gas by heating the nitrogen oxide sensor when the engine is operating and the control condition of the nitrogen oxide sensor is satisfied.2. The method according to claim 1 , wherein the control condition of the nitrogen oxide sensor is satisfied when a temperature of the exhaust gas is higher than a dew point temperature.3. The method according to claim 1 , further comprising:determining at a predetermined time interval whether the engine is operating while measuring the concentration of nitrogen oxide in the exhaust gas by the nitrogen oxide sensor; andmeasuring the concentration of nitrogen oxide in the exhaust gas by the nitrogen oxide sensor only when the engine is operating.4. The method according to claim 3 , further comprising determining whether the starting switch is in an off state if an engine is not operating.5. The method according to claim 4 , further comprising terminating claim 4 , when the off state of the starting switch is determined claim 4 , the control of the nitrogen oxide sensor that measures the concentration of nitrogen oxide in the exhaust gas by ...

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Номер записи: 90
05-01-2017 дата публикации

EXHAUST GAS PURIFICATION APPARATUS FOR AN INTERNAL COMBUSTION ENGINE (AS AMENDED)

Номер: US20170002709A1
Автор: Matsuo Junichi, Mikami Akira, Nakayama Shigeki, OHASHI Nobumoto, TAKADA Keishi
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

An exhaust gas purification apparatus for an internal combustion engine comprises: a selective catalytic reduction (SCR) catalyst selectively reducing NOx in an exhaust gas of the internal combustion engine using ammonia as a reducing agent; a supply device adding an additive agent, such as ammonia, to the exhaust gas at an upstream side of the SCR catalyst; and a controller, when a temperature of SCR catalyst is higher than a predetermined temperature, increases a NOx concentration of the exhaust gas flowing into the SCR catalyst and increases an amount of addition of the additive agent in such a manner that a ratio of an amount of ammonia with respect to an amount of NOx contained in the exhaust gas flowing into the SCR catalyst, becomes large, as compared to when the temperature is equal to or less than the predetermined temperature. 1. An exhaust gas purification apparatus for an internal combustion engine comprising:a selective catalytic reduction (SCR) catalyst that is arranged in an exhaust passage of the internal combustion engine, and selectively reduces NOx in an exhaust gas by using ammonia as a reducing agent;a supply device configured to add an additive agent, which is ammonia or a precursor of ammonia, to the exhaust gas at an upstream side of the SCR catalyst;a temperature detection device configured to detect a temperature of the SCR catalyst; andcontroller, comprising at least one processor, configured, when the temperature detected by the temperature detection device is higher than the predetermined temperature, to increase an inflow NOx concentration which is a NOx concentration of the exhaust gas flowing into the SCR catalyst and increase an amount of addition of the additive agent in such a manner that an equivalent ratio, which is a ratio of an amount of ammonia with respect to an amount of NOx contained in the exhaust gas flowing into the SCR catalyst, becomes large, as compared to when the temperature detected by the temperature detection ...

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Номер записи: 91
05-01-2017 дата публикации

Method and system for monitoring the operation of a catalytic converter

Номер: US20170002714A1
Автор: Daniel Roettger, Frederik De Smet, Mario Balenovic
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

The present disclosure concerns a method for monitoring the operation of a catalytic converter that is disposed in an exhaust system of an internal combustion engine, in particular of a motor vehicle, wherein an exhaust gas temperature upstream of the catalytic converter and an exhaust gas temperature downstream of the catalytic converter are determined. In order to improve the monitoring of such a catalytic converter regardless of the respective type of catalytic converter used, it is proposed with the present disclosure that an exhaust gas mass flow through the catalytic converter is determined, wherein it is determined whether a thermal inertia of the catalytic converter is present or absent according to the presence of a triggering event taking into account the exhaust gas temperatures and the exhaust gas mass flow.

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Номер записи: 92
05-01-2017 дата публикации

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Номер: US20170002760A1
Автор: Hayashita Go, Ide Koji
Принадлежит:

A control device for an internal combustion engine comprises an air-fuel ratio control part configured to control the air-fuel ratio of the exhaust gas and a heating control part configured to control the heating of the air-fuel ratio sensors. The heating control part controls the sensor heaters so that the temperature of the upstream air-fuel ratio sensor becomes less than the activation temperature and so that the temperature of the downstream air-fuel ratio sensor becomes the activation temperature or more while the internal combustion engine is stopped by the automatic stop function. The air-fuel ratio control part controls the exhaust air-fuel ratio based on the outputs of the two air-fuel ratio sensors during engine operation and control the air-fuel ratio temporarily based on only the output of the downstream air-fuel ratio sensor after the internal combustion engine has been restarted after automatic stop. 1. A control device for an internal combustion engine which has an automatic stop function , the internal combustion engine equipped with:an exhaust purification catalyst provided in an exhaust passage;an upstream air-fuel ratio sensor provided in the exhaust passage at an upstream side of the exhaust purification catalyst in a direction of flow of exhaust;a downstream air-fuel ratio sensor provided in the exhaust passage at a downstream side of the exhaust purification catalyst in the direction of flow of exhaust;an upstream side sensor heater heating the upstream air-fuel ratio sensor; anda downstream side sensor heater heating the downstream air-fuel ratio sensor, the control device comprising:an electronic control unit operatively connected to the internal combustion engine, the upstream air-fuel ratio sensor, the downstream air-fuel ratio sensor, the upstream side sensor heater, and the downstream side sensor heater, the electronic control unit configured to:control an air-fuel ratio of exhaust gas flowing into the exhaust purification catalyst; ...

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Номер записи: 93
07-01-2016 дата публикации

EXHAUST GAS CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE

Номер: US20160003120A1
Автор: Hoshi Sakutaro, TSUCHIYA Tomihisa
Принадлежит:

An exhaust gas control system of an internal combustion engine includes a urea water tank, a heater, a purifying device, a notification device, and a controller. The controller is configured to determine whether frozen urea water is left or not. The controller is configured to determine whether liquid urea water capable of being pumped out is not left or not. The controller is configured to estimate a suppliable amount of the urea water to the urea water tank in response to a state where the frozen urea water is left, and the controller configured to control the notification device so as to give a notification for prompting a supply of the suppliable amount of the urea water to the urea water tank in response to a state where liquid urea water capable of being pumped out is not left. 1. An exhaust gas control system of an internal combustion engine , comprising:a urea water tank to store urea water;a heater to heat frozen urea water within the. urea water tank;a purifying device configured to purify exhaust gas by addition of the urea water pumped from the urea water tank to the exhaust gas of the internal combustion engine;a notification device; anda controllerconfigured to(i) determine whether frozen urea water is left within the urea water tank or not;(ii) determine whether liquid urea water capable of being pumped out is not left within the urea water tank or not;(iii) estimate an amount of urea water that can be supplied into the urea water tank in response to a state where the frozen urea water is left within the urea water tank; and(iv) control the notification device so as to give a notification for prompting a supply of the amount of urea water that can be supplied into the urea water tank in response to a state where liquid urea water capable of being pumped out is not left within the urea water tank.2. The exhaust gas control system according to claim 1 , wherein the controller is configured to control the notification device so as to indicate an ...

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Номер записи: 94
07-01-2016 дата публикации

ELECTRONIC CONTROL MODULE FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20160003123A1
Автор: ARGOLINI Roberto, GIORDANO Alberto, TAIBI Cristian
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An electronic control module for operating an internal combustion engine is disclosed. The electronic control module is configured to monitor a first air-fuel equivalence ratio of engine exhaust gases upstream of a NOx trap, and to activate a diagnostic routine for the NOx trap when the first air-fuel equivalence ratio is smaller than one. The diagnostic routine enables the electronic control module to monitor a second air-fuel equivalence ratio of engine exhaust gases downstream of the NOx trap, to use the first and second air-fuel equivalence ratios to calculate an index that is representative of the conversion efficiency of the NOx trap, and to identify a failure of the NOx trap when the efficiency index is lower than a predetermined threshold value. 110-. (canceled)11. An electronic control module for operating an internal combustion engine , wherein the electronic control module is configured to:monitor a first air-fuel equivalence ratio of engine exhaust gases upstream of a NOx trap; andactivate a diagnostic routine for the NOx trap when the first air-fuel equivalence ratio is smaller than 1;wherein the diagnostic routine enables the electronic control module to:monitor a second air-fuel equivalence ratio of engine exhaust gases downstream of the NOx trap;use the first and second air-fuel equivalence ratios to calculate an index that is representative of a conversion efficiency of the NOx trap; andidentify a failure of the NOx trap when the efficiency index is lower than a predetermined threshold value.12. The electronic control module according to claim 11 , wherein the electronic control module is configured to:use the first air-fuel equivalence ratio to calculate a total quantity of hydrocarbons and carbon monoxide entering the NOx trap in a given time period;use both the first and second air-fuel equivalence ratios to calculate a total quantity of hydrocarbons and carbon monoxide converted in the NOx trap in the same time period; andcalculate the ...

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Номер записи: 95
05-01-2017 дата публикации

FAULT DIAGNOSIS SYSTEM AND METHOD OF EXHAUST GAS TEMPERATURE SENSOR OF HYBRID VEHICLE

Номер: US20170003179A1
Автор: JIN Jeong Sik
Принадлежит:

An exhaust temperature sensor fault diagnosis method of a hybrid vehicle includes: determining whether a starting of the vehicle is turned on depending on an operation of a starter switch; determining whether a fault diagnosis condition of the exhaust temperature sensor is satisfied; diagnosing the fault of the exhaust temperature sensor if the fault diagnosis condition of the exhaust temperature sensor is satisfied; determining whether the engine is driving during the fault of the exhaust temperature sensor is diagnosed; and finishing the fault diagnosis of the exhaust temperature sensor if the engine is not driving. 1. An exhaust temperature sensor fault diagnosis method of a hybrid vehicle comprising:determining whether a starting of the vehicle is turned on depending on an operation of a starter switch;determining whether a fault diagnosis condition of the exhaust temperature sensor is satisfied;diagnosing the fault of the exhaust temperature sensor when the fault diagnosis condition of the exhaust temperature sensor is satisfied;determining whether an engine is driving during the fault of the exhaust temperature sensor is diagnosed; andfinishing the fault diagnosis of the exhaust temperature sensor when the engine is not driving.2. The exhaust temperature sensor fault diagnosis method of claim 1 , wherein the fault diagnosis condition of the exhaust temperature sensor is satisfied when a driving time of the engine exceeds a predetermined driving time claim 1 , an exhaust temperature exceeds a predetermined temperature claim 1 , and the exhaust temperature lasts during a predetermined time that the exhaust temperature exceeds the predetermined temperature.3. The exhaust temperature sensor fault diagnosis method of claim 2 , wherein a fault in a power line of the exhaust temperature sensor is diagnosed when an output voltage of the exhaust temperature sensor exceeds an uppermost predetermined value claim 2 , anda fault in a ground line of the exhaust temperature ...

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Номер записи: 96
05-01-2017 дата публикации

METHOD, APPARATUS, AND SYSTEM FOR DIAGNOSING AT LEAST ONE NOx-SENSOR OF A DIESEL ENGINE SYSTEM

Номер: US20170003259A1
Автор: HUNTER Arjen Daniël
Принадлежит:

A method and apparatus for field testing and diagnosing at least one NO-sensor in a diesel engine exhaust system are disclosed. The field testing apparatus is connectable to a truck having a lean burn diesel type engine, via an on-board diagnostic connector. The field testing apparatus is arranged to initiate a test cycle, and to diagnose at least one NO-sensor in an exhaust system of the truck. The test cycle is performed on a running engine as a test sequence in a stationary truck, in at least two different states of operation, while NOrelated values issued by the at least one NO-sensor are measured over a predefined period of time. At least one state of operation is obtained by simultaneously opening the exhaust gas recirculation valve and controlling the back pressure valve for increasing backpressure. A dedicated algorithm is used to compare the measured values to a predefined model, and to provide a numerical summary and statistical evaluation of the sensor functioning. The numerical summary being indicative of a likelihood of the at least one NO-sensor behaving correctly, and thereby enables a well founded decision as to whether or not the at least one NO-sensor requires replacement. 2. The method of claim 1 , wherein the at least one NO-sensor is one of a first and a second NO-sensor.3. The method of claim 2 , wherein the first NO-sensor is positioned upstream of an exhaust gas treatment system.4. The method of claim 2 , wherein the second NO-sensor is positioned downstream of the exhaust gas treatment system.5. The method of claim 1 , wherein the exhaust gas treatment system comprises an exhaust gas recirculation system connecting an exhaust to an inlet via an exhaust gas recirculation valve claim 1 , the exhaust comprises a back pressure valve claim 1 , and the method further comprises testing steps of:running the diesel engine in one state of operation, with one NOx production level;{'sub': 'x', 'obtaining a first values reading of the at least one NO- ...

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Номер записи: 97
04-01-2018 дата публикации

NOx SENSOR DIAGNOSTIC FOR AN EXHAUST AFTERTREATMENT SYSTEM

Номер: US20180003098A1
Автор: Ferguson Christopher, Hall Tony James, Liimatta Brian P., Osburn Andrew W.
Принадлежит: Cummins, Inc.

A method for diagnosing NOx sensors in an exhaust aftertreatment system includes suspending reductant dosing in an exhaust aftertreatment system; purging a reductant deposit in a selective catalytic reduction (SCR) system of the exhaust aftertreatment system; adjusting at least one of an ignition timing and an engine speed for an engine to adjust an engine out nitrogen oxide (NOx) amount; receiving measured SCR inlet NOx data from a SCR inlet NOx sensor and measured SCR outlet NOx data from a SCR outlet NOx sensor; determining a phase shift between the measured SCR inlet and SCR outlet NOx data; applying the determined phase shift to the SCR outlet NOx data; and determining a diagnostic feature based on the SCR inlet NOx data and the phase shifted SCR outlet NOx data regarding a state of the SCR inlet and outlet NOx sensors. 1. A method , comprising:suspending dosing in an exhaust aftertreatment system;commanding an engine to affect an engine out nitrogen oxide (NOx) amount;interpreting a measured SCR inlet NOx data from a SCR inlet NOx sensor;interpreting a measured SCR outlet NOx data from a SCR outlet NOx sensor;determining a phase shift between the measured SCR inlet NOx data and the measured SCR outlet NOx data and applying the phase shift to the measured SCR outlet NOx amount data; anddetermining a diagnostic feature based on the SCR inlet NOx data and the phase shifted SCR outlet NOx data by determining a state of the SCR inlet and outlet NOx sensors based on the diagnostic feature, and notifying a user of the state of the SCR inlet and outlet NOx sensors, the state including at least one of an operational state and that at least one of the SCR inlet and outlet NOx sensors are faulty.2. The method of claim 1 ,wherein the diagnostic feature includes a first diagnostic feature and a second diagnostic feature;wherein the first diagnostic feature is a gain diagnostic feature, the gain diagnostic feature representing a slope of a best fit line for the phase ...

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Номер записи: 98
07-01-2021 дата публикации

Improved soot load estimation using dual differential pressure sensors

Номер: US20210003060A1
Автор: Sriram Srinivasan
Принадлежит: Cummins Emission Solutions Inc

An exhaust filtration system comprises a first pressure sensor and a second pressure sensor, each configured to measure pressure in the exhaust filtration system under low-flow conditions. The exhaust filtration system comprises a third pressure sensor and a fourth pressure sensor, each configured to measure pressure in the exhaust filtration system under high-flow conditions. A flow rate of exhaust gas flowing through the exhaust filtration system is periodically determined. When the flow rate is below a predetermined flow rate threshold, the first and second pressure sensors are used to measure pressure in the exhaust filtration system, and a soot load of the exhaust filtration system is estimated using the pressure measured by the first and second pressure sensors. When the flow rate is above the predetermined flow rate threshold, the third and fourth pressure sensors are used to measure pressure in the exhaust filtration system and a soot load of the exhaust filtration system is estimated using the pressure measured by the third and fourth pressure sensors.

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Номер записи: 99
03-01-2019 дата публикации

SYSTEM AND METHOD FOR DETERMINING REDUCTANT DELIVERY PERFORMANCE

Номер: US20190003362A1
Автор: Chunodkar Apurva Arvind, Haas Michael, Kukreja Astha, Sundar Bharath
Принадлежит: Cummins, Inc.

An apparatus includes a pump, a delivery mechanism in fluid communication with the pump, and a controller communicatively coupled to the pump and the delivery mechanism. The controller is structured to interpret, via a pump diagnostic circuit, first and second pump parameters indicative of first and second pump rates, interpret, via a dosing diagnostic circuit, first and second dosing parameters indicative of at least one of (i) first and second reductant flows or (ii) first and second injector characteristics, determine, via a delivery diagnostic circuit, a delivery status based, at least in part, on the interpretation of the first and second pump parameters and the first and second dosing parameters, and generate, via the delivery diagnostic circuit, a status command indicative at least one of an under-restricted delivery mechanism or an over-restricted delivery mechanism in response to the determination of the delivery status. 1. A system comprising:a pump;a delivery mechanism in fluid communication with the pump; and interpret, via a pump diagnostic circuit, first and second pump parameters indicative of first and second pump rates;', 'interpret, via a dosing diagnostic circuit, first and second dosing parameters indicative of at least one of (i) first and second reductant flows or (ii) first and second injector characteristics;', 'determine, via a delivery diagnostic circuit, a delivery status based, at least in part, on the interpretation of the first and second pump parameters and the first and second dosing parameters; and', 'generate, via the delivery diagnostic circuit, a status command indicative at least one of an under-restricted delivery mechanism or an over-restricted delivery mechanism in response to the determination of the delivery status., 'a controller communicatively coupled to the pump and the delivery mechanism, the controller structured to2. The system of claim 1 , wherein the determination of the delivery status further comprises:determining ...

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Номер записи: 100