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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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Применить Всего найдено 6871. 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
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: 2
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: 3
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: 4
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: 5
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: 6
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: 7
28-06-2012 дата публикации

Exhaust particulate filter system and methods

Номер: US20120159929A1
Автор: Anthony C. Rodman, Michael A. Snopko, Rajesh N. Nair
Принадлежит: Caterpillar Inc

A method of operating an exhaust particulate filter system for an internal combustion engine includes transmitting electromagnetic energy, for example having a frequency above about 2 GHz through an exhaust particulate filter containing trapped soot. The transmitted electromagnetic energy may be attenuated in response to the trapped soot, and a filter soot loading value calculated based at least in part upon a correlation among an attenuation of the electromagnetic energy, a temperature of the filter, and a mass of the trapped soot. An algorithm based upon a partial derivative of an equation representing the correlation may be used in calculating the filter soot loading value, and a resulting soot mass. Responsive to determining the calculated soot mass satisfies regeneration suitability conditions, a regeneration initiation command may be outputted.

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Номер записи: 8
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: 9
27-09-2012 дата публикации

Exhaust purifying apparatus for internal combustion engine

Номер: US20120240559A1
Автор: Kenichi Tsujimoto
Принадлежит: Toyota Motor Corp

Degradation of ignition means due to combustion of foreign objects attached to the ignition means is suppressed. There are provided a fuel supplying apparatus for supplying fuel into an exhaust passage in an internal combustion engine, a heating apparatus for burning the supplied fuel, and a controller. The controller, in a case where unburned components of an exhaust gas are deposited in the heating apparatus, burns the deposited unburned components by the heating apparatus for removal before increasing a temperature of the exhaust gas by igniting the fuel supplied from the fuel supplying apparatus by the heating apparatus.

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Номер записи: 10
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: 11
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: 12
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: 13
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: 14
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: 15
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: 16
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: 17
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: 18
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: 19
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: 20
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: 21
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: 22
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: 23
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: 24
28-11-2013 дата публикации

Method and apparatus for controlling a diagnostic module for an exhaust gas sensor

Номер: US20130317727A1
Автор: Chad E. Marlett, Janean E. Kowalkowski, Jason J. Chung, Scott T. Feldmann
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A method and apparatus for controlling a diagnostic module for an exhaust gas sensor in a vehicle is provided. The exhaust gas sensor is located in an exhaust pathway in the vehicle. The diagnostic module may be configured to perform a signal range verification of an oxygen sensor portion of the exhaust gas sensor. A controller is operatively connected to the exhaust gas sensor and to the vehicle engine. The controller disables the diagnostic module when one or more entry conditions are satisfied. The entry conditions may include requiring the engine speed to be greater than a fuel cut-off threshold, the fuel cut-off threshold being the engine speed at which the fuel to the engine is terminated. The entry conditions may include: no fuel being delivered to the engine; and a vehicle exhaust brake mode being activated such that the exhaust pathway from the engine is obstructed.

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Номер записи: 25
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: 26
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: 27
04-01-2018 дата публикации

UREA-WATER INJECTOR MODULE

Номер: US20180001258A1
Автор: Kim Dong Hyun, Kim Hyun Ik, KIM Se Hun
Принадлежит:

A urea-water injector module is provided. The urea-water injector module includes an injector configured to discharge urea water to purify exhaust gas of a vehicle, a main body having the injector installed therein, and a plurality of heat dissipation plates stacked on an exterior surface of the main body to assist heat dissipation. Further the urea-water injector includes a heat block flange disposed under the heat dissipation plate and configured to obstruct heat from being transferred from an exhaust pipe and a mounting unit disposed under the heat block flange and coupled to the exhaust pipe. 1. A urea-water injector module comprising:an injector configured to receive power from an external device and discharge urea water to purify exhaust gas of a vehicle;a main body having the injector disposed therein;a plurality of heat dissipation plates coupled to an exterior surface of the main body in a stacked structure, with a refrigerant flow passage formed in the heat dissipation plates having urea water that flows in the heat dissipation plates;a heat block flange disposed under the heat dissipation plates and configured to obstruct heat transferred from a cavity below the heat dissipation plates; anda mounting unit installed under the heat block flange, the mounting unit coupled to an exhaust pipe.2. The urea-water injector module according to claim 1 , further comprising:a disk insulator disposed between the heat dissipation plates and the heat block flange.3. The urea-water injector module according to claim 1 , further comprising:a thermostat valve coupled at a first side to a urea-water tank and coupled at a second side to an inlet of the injector, wherein the thermostat valve is configured to control circulation of urea water discharged from the urea-water outlet port.4. The urea-water injector module according to claim 1 , wherein the heat dissipation plates comprise:an upper heat dissipation plate disposed in an upper portion of the heat dissipation plates, ...

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Номер записи: 28
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: 29
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: 30
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: 31
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: 32
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: 33
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: 34
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: 35
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: 36
02-01-2020 дата публикации

GAS SENSOR AND SENSOR ELEMENT

Номер: US20200003725A1
Автор: Ikoma Nobukazu, NAKAGAKI Kunihiko, NAKASONE Osamu, OKAMOTO Taku
Принадлежит:

A gas sensor includes an element body, an inner main pump electrode, an inner auxiliary pump electrode, an inner preliminary pump electrode, a measurement electrode, a reference electrode, a measurement voltage detection device, a specific gas concentration detection device. The inner preliminary pump electrode, the inner main pump electrode, the inner auxiliary pump electrode and the measurement electrode include each contain a noble metal having catalytic activity. At least one of the inner preliminary pump electrode and the inner main pump electrode contains no noble metal having a catalytic activity suppression ability, the catalytic activity suppression ability being an ability to suppress the catalytic activity of the noble metal having the catalytic activity from being exhibited to the specific gas. The inner auxiliary pump electrode contains a noble metal having the catalytic activity suppression ability. 1. A gas sensor comprising:an element body including an oxygen-ion-conductive solid electrolyte layer, a measurement-object gas flow section being provided within the element body to allow a measurement-object gas to be introduced into the measurement-object gas flow section and flow through the measurement-object gas flow section;a main pump cell that pumps oxygen from a first internal space to adjust an oxygen concentration of the first internal space, the first internal space being provided in the measurement-object gas flow section;an auxiliary pump cell that pumps oxygen from a second internal space to adjust an oxygen concentration of the second internal space, the second internal space being provided downstream of the first internal space in the measurement-object gas flow section;a preliminary pump cell that pumps oxygen into a preliminary chamber to prevent the measurement-object gas from reaching the first internal space in a state in which the measurement-object gas is a low-oxygen atmosphere, the preliminary chamber being provided upstream of ...

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Номер записи: 37
11-01-2018 дата публикации

DEF DOSING FOR SELECTIVE CATALYTIC REDUCTION CATALYSTS

Номер: US20180008932A1
Автор: Funk Sarah, Hernandez Garcia Pablo E., Quigley David P., Radwan Amr M.
Принадлежит:

A method to reduce NOx breakthrough and NH3 slip is provided when the SCR system is increasing in temperature and/or increasing exhaust gas mass flow. The method includes the steps of monitoring states of parameters of the exhaust gas upstream of an SCR catalyst where the states of parameters include at least one of the inlet temperature or the exhaust gas mass flow; identifying one of a temperature increase or an increased exhaust gas mass flow at the SCR inlet; identifying a new lower ammonia set-point or storage concentration for the SCR; and identifying the rate of NH3 consumption. The method further includes the step of determining an “intervening phase” a small dosage of DEF is continued during the intervening phase. 1. A method to reduce NObreakthrough when the SCR is increasing in temperature , the method comprising the steps of:monitoring a plurality of parameters of an exhaust gas feed stream upstream of an ammonia-selective catalyst reduction device;identifying one of a temperature increase at an SCR inlet or an exhaust gas flow increase at an SCR inlet;identifying a new lower ammonia set-point;{'sub': 3', '3, 'determining an NHconsumption rate on the SCR brick, an estimated ammonia storage concentration on the SCR, and a percentage of NHconsumed by sequentially determining a change in ammonia storage for a plurality of discrete substrate elements on the SCR brick;'}comparing the new lower ammonia set point against the estimated ammonia storage concentration to determine if a transient phase status exists; and{'sub': 3', 'x, 'providing a percentage of DEF dosage equivalent to the percentage of NHconsumed during the transient phase to prevent NObreakthrough and to prevent NH3 slip until the expiration of the intervening phase and steady state is achieved'}wherein the percentage of DEF dosage does not deviate from the percentage of NH3 consumption during the transient phase.2. The method as defined in wherein the plurality of parameters includes at least ...

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Номер записи: 38
27-01-2022 дата публикации

METHODS FOR EVALUATING DIESEL EXHAUST FLUID QUALITY

Номер: US20220025800A1
Автор: Meijer Maarten, Ramesh Varun, Swart Charles Wayne Reinhardt, Webb Cynthia Chaffin
Принадлежит:

The present disclosure describes methods for evaluating quality of DEF dosed to an EAS including a close coupled SCR unit a downstream SCR unit. A NOx conversion efficiency of the close coupled SCR unit and a NOx conversion efficiency of the downstream SCR unit are used to evaluate quality of DEF. In some embodiments, the NOx conversion efficiency of close coupled SCR unit is used to evaluate quality of DEF. Operation of an EAS using the results of the evaluation of quality of DEF are described. 1. A method of evaluating DEF quality in an emissions aftertreatment system (EAS) including a close coupled selective catalytic reduction (SCR) unit and a downstream SCR unit , the method comprising:determining a NOx conversion efficiency of the close coupled SCR unit;comparing the determined NOx conversion efficiency of the close coupled SCR unit to a target NOx conversion efficiency for the close-coupled SCR unit;determining an NOx conversion efficiency of the downstream SCR unit;comparing the determined NOx conversion efficiency of the downstream SCR unit to a target NOx conversion efficiency for the downstream SCR unit; andusing a result of the comparing the determined NOx conversion efficiency of the close coupled SCR unit and a result of the comparing the determined NOx conversion efficiency of the downstream SCR unit to evaluate quality of diesel exhaust fluid (DEF) provided to the EAS.2. The method of claim 1 , further comprising initiating the determining NOx conversion efficiency of the close coupled SCR unit or the determining NOx conversion efficiency of the downstream SCR unit after an amount of DEF in a DEF tank of the EAS has changed more than 20 percent.3. The method of claim 1 , wherein the target NOx conversion efficiency of the close coupled SCR unit is obtained from a lookup table.4. The method of claim 3 , wherein the lookup table includes target NOx conversion efficiency values for the close coupled SCR unit as a function of age of a close coupled SCR ...

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Номер записи: 39
27-01-2022 дата публикации

NOX SENSOR DIAGNOSTICS IN HEAVY-DUTY MOTOR VEHICLE ENGINES

Номер: US20220025802A1
Автор: Meijer Maarten, Ramesh Varun, Swart Charles Wayne Reinhardt, Webb Cynthia Chaffin
Принадлежит:

A heavy-duty truck has a diesel engine, an exhaust after-treatment system, and an engine control unit. The exhaust after-treatment system includes a close-coupled selective catalytic reduction system and an underbody selective catalytic reduction system, a first NOsensor upstream of the close-coupled selective catalytic reduction system, a second NOsensor between the two selective catalytic reduction systems, and a third NOsensor downstream of the underbody selective catalytic reduction system. The engine control unit may perform methods allowing intrusive diagnostics to be performed on exhaust gas NOsensors using the selective catalytic reduction systems during normal operation of the heavy-duty truck. 1. A method , comprising:operating a diesel engine of a heavy-duty truck such that the diesel engine generates an exhaust gas flow and the exhaust gas flow flows into an exhaust after-treatment system of the heavy-duty truck, the exhaust after-treatment system including a close-coupled selective catalytic reduction system and an underbody selective catalytic reduction system downstream of the close-coupled selective catalytic reduction system with respect to the exhaust gas flow;controlling a DEF injector upstream of the close-coupled selective catalytic reduction system to increase a rate at which the DEF injector injects DEF into the exhaust gas flow;{'sub': x', 'x', 'x', 'x, 'measuring a first level of NOgases with a first NOsensor upstream of the close-coupled selective catalytic reduction system and a second level of NOgases with a second NOsensor downstream of the close-coupled selective catalytic reduction system as the rate at which the DEF injector injects DEF increases; and'}{'sub': 'x', 'using the measurements to determine a level of error in measurements provided by the first NOsensor.'}2. The method of claim 1 , further comprising controlling NOtailpipe emissions using the underbody selective catalytic reduction system.3. The method of claim 1 , further ...

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Номер записи: 40
27-01-2022 дата публикации

Method and Device for Inspecting and Safeguarding a Functionality of an Exhaust Gas Aftertreatment System of a Combustion Engine

Номер: US20220025808A1
Автор: Ellmer Dietmar
Принадлежит: Vitesco Technologies GmbH

The disclosure relates to a method for checking and ensuring the functionality of an exhaust gas aftertreatment system of an internal combustion engine. The exhaust gas aftertreatment system has a catalytic converter and a voltage source. The catalytic converter has a catalytic converter area and an electrical heating device which is selectively supplied with electrical energy from the voltage source. The method includes determining an actual value which is characteristic of an ohmic resistance of the heating device. The actual value being determined by using an electrical current strength supplied to the heating device and an electrical voltage supplied to the heating device from the voltage source. The method also includes providing a setpoint value which is characteristic of an expected ohmic resistance of the heating device. The setpoint value takes into account a specific heating-up behavior of the heating device and an expected long-term behavior of the catalytic converter. 1. A method for checking and ensuring functionality of an exhaust gas aftertreatment system of an internal combustion engine , the exhaust gas aftertreatment system includes a catalytic converter and a voltage source , the catalytic converter having a catalytic converter area and an electrical heating device which is selectively supplied with electrical energy from the voltage source , wherein the method comprising:determining an actual value which is characteristic of an ohmic resistance of the heating device, the actual value being determined by using an electrical current strength supplied to the heating device and an electrical voltage supplied to the heating device from the voltage source;providing a setpoint value which is characteristic of an expected ohmic resistance of the heating device, the setpoint value taking into account a specific heating-up behavior of the heating device and an expected long-term behavior of the catalytic converter; andcomparing the actual value with the ...

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Номер записи: 41
14-01-2016 дата публикации

CATALYST ASSEMBLY WITH INTEGRATED EMISSIONS SAMPLING PROBE

Номер: US20160010532A1
Автор: Lavalle Joshua James, Spaulding Dennis John
Принадлежит:

A system includes a catalyst assembly configured to mount along an exhaust flow path of a reciprocating combustion engine. The catalyst assembly includes a housing having an inlet, an outlet, and a flow path between the inlet and the outlet. The catalyst assembly also includes or more catalyst elements disposed in the housing along the flow path. The catalyst assembly further includes an emissions sampling probe integrated within the housing along the flow path. 1. A three-way catalyst (TWC) assembly configured to mount along an exhaust flow path of a reciprocating combustion engine , comprising:a housing comprising an inlet, an outlet, a wall, and a port disposed along the wall between the inlet and the outlet, and a flow path between the inlet and the outlet;one or more catalyst elements disposed in the housing along the flow path; andan emissions sampling probe integrated within the housing along the flow path, wherein the emissions sampling probe comprises a tube disposed within the port, a first portion of the tube extends through the wall into the flow path within the housing, and a second portion of the tube extends through the wall outside of the housing.2. (canceled)3. The TWC assembly of claim 1 , wherein the first portion of the tube comprises one or more sampling ports for collecting a portion of an exhaust from the reciprocating combustion engine within the emissions sampling probe.4. (canceled)5. The TWC assembly of claim 3 , wherein the second portion of the tube is configured to couple to an emissions analyzer and to provide the collected portion of the exhaust to the emissions analyzer.6. The TWC assembly of claim 1 , wherein the emissions sampling probe is integrated within the housing upstream of each of the one or more catalyst elements.7. The TWC assembly of claim 1 , wherein the emissions sampling probe is integrated within the housing downstream of the one or more catalyst elements.8. The TWC assembly of claim 1 , comprising a plurality of ...

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Номер записи: 42
11-01-2018 дата публикации

METHOD FOR DIAGNOSING DEGRADATION IN CATALYST

Номер: US20180010506A1
Автор: HIRATA Noriko, MONNA Kosuke, OKAMOTO Taku
Принадлежит:

Provided is a method for diagnosing whether an oxidation catalyst has degraded, based on an output value from one diagnostic sensor with higher accuracy. When a ratio of nitrogen monoxide that is oxidized by a catalyst and discharged downstream of the catalyst as nitrogen dioxide, with respect to nitrogen monoxide contained in an exhaust gas supplied upstream of the catalyst in an exhaust path is defined as a NO conversion rate, a diagnostic sensor configured to output an electromotive force corresponding to the NO conversion rate as a diagnostic output is provided downstream of the catalyst in the exhaust path, and whether the catalyst has degraded beyond an acceptable limit is diagnosed by comparing the diagnostic output with a threshold value predetermined depending on a temperature of the catalyst. 1. A method for diagnosing a degree of degradation in a catalyst that oxidizes a gas component contained in an exhaust gas discharged from an internal combustion engine , said catalyst being provided in an exhaust path of said internal combustion engine , said method comprising:a) providing a diagnostic sensor downstream of said catalyst in said exhaust path, said diagnostic sensor being configured to output an electromotive force corresponding to a NO conversion rate as a diagnostic output; andb) diagnosing whether said catalyst has degraded beyond an acceptable limit by comparing said diagnostic output with a threshold value predetermined depending on a temperature of said catalyst,wherein said NO conversion rate is defined as a ratio of nitrogen monoxide that is oxidized by said catalyst and discharged downstream of said catalyst as nitrogen dioxide, with respect to nitrogen monoxide contained in said exhaust gas supplied upstream of said catalyst in said exhaust path.2. The method according to claim 1 , further comprisingc) checking whether degradation diagnosing conditions hold, before said diagnosing in said step (b), said first condition: said temperature of ...

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Номер записи: 43
10-01-2019 дата публикации

Exhaust gas purification system of working machine

Номер: US20190010843A1
Автор: Kenta Saitou
Принадлежит: Yanmar Co Ltd

An exhaust gas purification system of a working machine is operable to reduce a loss of a working time caused by a point that it takes a long time to renew an exhaust gas purification device by throttle devices. The exhaust gas purification system of the working machine is provided with a common rail type engine which is mounted to the working machine, an exhaust gas purification device which is arranged in an exhaust system of the engine, and at least one of the intake air throttle device and the exhaust gas throttle device. It is provided with mode selection input means which selects whether an auxiliary renewing mode is executed or a forced renewing mode is executed in the case that a clogged state of the exhaust gas purification device is equal to or more than a prescribed level.

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Номер записи: 44
10-01-2019 дата публикации

SELECTIVE CATALYTIC REDUCTION STEADY STATE AMMONIA SLIP AND REDUCTANT BREAKTHROUGH DETECTION

Номер: US20190010851A1
Автор: Dean Charles E., Funk Sarah, Lee Po-I, Quigley David P.
Принадлежит:

Technical solutions are described for an emissions control system for a motor vehicle including an internal combustion engine. An example emissions control system for treating exhaust gas in a motor vehicle including an internal combustion engine. For example, the emissions control system includes a selective catalytic reduction (SCR) device, an NOx sensor, and a controller that is configured to detect a NH3 slip of the SCR device. The controller detects the NH3 slip by modulating an engine out NOx from an engine, demodulating the engine out NOx from the engine to original state, and measuring NOx upstream and downstream from the SCR device after the modulation. Further, the controller determines the NH3 slip by comparing gradients in the NOx measurement with one or more predetermined thresholds. 1. An emissions control system for treating exhaust gas in a motor vehicle including an internal combustion engine , the emissions control system comprising:a selective catalytic reduction (SCR) device;an NOx sensor; and modulating an engine out NOx from an engine;', 'demodulating the engine out NOx from the engine to original state;', 'measuring NOx upstream and downstream from the SCR device after the modulation; and', 'determining the NH3 slip by comparing gradients in the NOx measurement with one or more predetermined thresholds., 'a controller that is configured to detect a NH3 slip of the SCR device by2. The emissions control system of claim 1 , wherein the SCR device is determined to be overdosed in response to a gradient of the NOx measurement corresponding to a rise in SCR out NOx claim 1 , which is measured downstream from the SCR device claim 1 , not meeting a predetermined threshold.3. The emissions control system of claim 1 , wherein the SCR device is determined to be underdosed in response to a gradient of the NOx measurement corresponding to a reduction in the SCR out NOx claim 1 , which is measured downstream from the SCR device claim 1 , exceeding a ...

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Номер записи: 45
10-01-2019 дата публикации

DOWNSTREAM OXYGEN SENSOR PERFORMANCE FOR SELECTIVE CATALYTIC REDUCTION

Номер: US20190010852A1
Автор: Brancaccio Madeleine, Funk Sarah, Hernandez Garcia Pablo E., Quigley David P.
Принадлежит:

Technical solutions are described for an emissions control system for a motor vehicle including an internal combustion engine. An example computer-implemented method for controlling an exhaust system of an internal combustion engine, includes detecting a high hydrocarbon region in the operation of the internal combustion engine. The method further includes responsively, measuring an upstream temperature of an oxidation device of the exhaust system. Further yet, the method includes in response to the upstream temperature being equal to or above a predetermined threshold, delaying an O2 diagnosis of the exhaust system for a signal rationality delay time. 1. An emissions control system for treating exhaust gas in a motor vehicle including an internal combustion engine , the emissions control system comprising:an oxidation device;an O2 diagnosis module configured to diagnose the oxidation device; and detecting a high hydrocarbon region in the operation of the internal combustion engine;', 'responsively, measuring an upstream temperature of the oxidation device; and', 'in response to the upstream temperature being above a predetermined threshold, delaying the O2 diagnosis module for a signal rationality delay time., 'a controller that is configured to manage the O2 diagnosis module by2. The emissions control system of claim 1 , wherein delaying the Odiagnosis module comprises switching the O2 diagnosis module off for the signal rationality delay time.3. The emissions control system of claim 1 , wherein the signal rationality delay time is a predetermined amount of time.4. The emissions control system of claim 1 , wherein the signal rationality delay time is determined based on a state of the oxidation device.5. The emissions control system of claim 4 , wherein determining the signal rationality delay time comprises accessing a look-up table corresponding to an oxidation device performance.6. The emissions control system of claim 1 , wherein detecting the high hydrocarbon ...

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Номер записи: 46
10-01-2019 дата публикации

METHOD AND DEVICE FOR DIAGNOSING A DIFFERENTIAL PRESSURE SENSOR OF A PARTICLE FILTER

Номер: US20190010853A1
Автор: Brandt Martin, Lian Yunjie, Stephani Martin
Принадлежит:

In a method and a device for diagnosing a differential pressure sensor of a particle filter of an internal combustion engine, where the differential pressure sensor is connected via a first pressure line to an exhaust-gas system upstream from the particle filter and via a second pressure line to the exhaust-gas system downstream from the particle filter and upstream from a rear muffler, a diagnosis of the first or second pressure lines is performed by evaluating a comparison of a differential pressure signal from a differential pressure sensor with modeled pressure values. 1. A method for diagnosing a differential-pressure sensor of a particle filter of an internal combustion engine , the differential-pressure sensor being connected (a) via a first pressure line to an exhaust-gas system upstream from the particle filter , and (b) via a second pressure line to an exhaust-gas system downstream from the particle filter and upstream from at least one rear muffler , the method comprising:diagnosing the first or second pressure lines by evaluating a comparison of a differential pressure signal from the differential pressure sensor with modeled pressure values.2. The method of claim 1 , further comprising ascertaining a measured pressure drop over the particle filter from the differential pressure signal claim 1 , forming a first cross-correlation claim 1 , which is of the measured pressure drop and a modeled pressure drop over the particle filter claim 1 , wherein the comparison includes comparing the first cross-correlation to a modeled value that includes a modeled pressure drop over the rear muffler.3. The method of claim 2 , further comprising forming a second cross-correlation claim 2 , which is of the measured pressure drop claim 2 , the modeled pressure drop over the particle filter claim 2 , and a modeled pressure drop over the rear muffler claim 2 , wherein the comparison includes comparing the second cross-correlation to the first cross-correlation claim 2 , and ...

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Номер записи: 47
10-01-2019 дата публикации

SYSTEM AND METHOD FOR ADAPTING COMBUSTION TO MITIGATE EXHAUST OVERTEMPERATURE

Номер: US20190010883A1
Автор: DUTTO Andrea, GATTI Luca, PANNUZZO Andrea, TAIBI Cristian
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A system and method for monitoring the temperature in a vehicle after-treatment system is provided. The system includes one or more temperature sensors positioned in the vehicle after-treatment system and an electronic control unit (ECU) configured by programming instructions encoded in computer readable media to execute a method. The method includes monitoring the temperature presented by the one or more temperature sensors, executing a lower oxygen combustion strategy for a slower exothermic reaction when the temperature exceeds a first threshold level, and deactivating the lower oxygen combustion strategy when the temperature drops below a second threshold level. 1. A method in a vehicle , comprising:monitoring the temperature in a vehicle after-treatment system;executing a lower oxygen combustion strategy for a slower exothermic reaction when the temperature exceeds a first threshold level; anddeactivating the lower oxygen combustion strategy when the temperature drops below a second threshold level.2. The method of claim 1 , wherein the monitoring is performed by a vehicle electronic control unit (ECU).3. The method of claim 2 , wherein the executing is performed under the control of the ECU.4. The method of claim 3 , wherein the deactivating is performed under the control of the ECU.5. The method of claim 1 , wherein the lower oxygen combustion strategy comprises reducing oxygen content by reducing airflow into one or more combustion cylinders.6. The method of claim 5 , wherein the lower oxygen combustion strategy comprises reducing oxygen content by adding EGR gases into one or more combustion cylinders.7. The method of claim 1 , wherein the lower oxygen combustion strategy comprises delaying the main injection SOI (start of injection).8. The method of claim 1 , wherein the lower oxygen combustion strategy comprises reducing the air-to-fuel ratio and combustion efficiency in the combustion chamber by adding one or more after injections.9. The method of claim ...

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Номер записи: 48
09-01-2020 дата публикации

Method For Operating An Electrically Heatable Catalyst

Номер: US20200011225A1
Автор: Peter Hirth, Thomas Harig
Принадлежит: Vitesco Technologies GmbH

A method for operating an electrically heatable catalytic converter in an exhaust tract of an internal combustion engine having at least one honeycomb body through which an exhaust-gas stream can flow, and having at least one electrically heatable heating conductor positioned upstream of the honeycomb body in a throughflow direction of the exhaust gas includes: applying an electrical current to the heating conductor such that the heating conductor is electrically heated in a manner dependent on an ambient temperature around the heating conductor; and electrically heating the heating conductor such that a dwell time of a temperature of the heating conductor is bounded in a temperature range defined by a first lower limit temperature T G1U and an upper limit temperature T G1O .

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Номер записи: 49
09-01-2020 дата публикации

Radio Frequency Process Sensing, Control, and Diagnostics Network

Номер: US20200014470A1
Автор: Alexander Sappok, Leslie Bromberg
Принадлежит: Filter Sensing Technologies Inc

A sensing and control system and method is disclosed, which utilizes cavity resonance and waveguide measurements to directly monitor process state variables or detect changes in the state of a system and provide direct in situ feedback control top optimize the process. The same system may be used to monitor a number of different process parameters including the composition, amount, distribution, and physical or chemical properties of a material, or to monitor the state or health of a system or sub-system. The system is broadly applicable to wide range of systems and process including ranging from engines and exhaust systems to production plants.

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Номер записи: 50
03-02-2022 дата публикации

SYSTEMS AND METHODS FOR DYNAMIC CONTROL OF FILTRATION EFFICIENCY AND FUEL ECONOMY

Номер: US20220034245A1
Автор: HEICHELBECH John K., Su Changsheng C., WANG Yujun
Принадлежит: Cummins Emission Solutions Inc.

An aftertreatment system comprises a SCR system, a first filter, and a second filter disposed downstream of the first filter and a bypass conduit providing a flow path bypassing the second filter. A valve is operatively coupled to the bypass conduit and is moveable between a closed position in which the exhaust gas flows through the second filter, and an open position in which at least a portion of the exhaust gas flows through the bypass conduit. A controller is operatively coupled to the valve configured to adjust the valve based on a first filtration efficiency of the first filter to cause the exhaust gas expelled into the environment from the aftertreatment to have a particulate matter count meeting particulate matter emission standards. 1. An aftertreatment system configured to reduce constituents of an exhaust gas produced by an engine , comprising:a first filter;a second filter disposed downstream of the first filter;a bypass conduit fluidly coupling an exhaust gas flow path downstream of the first filter and upstream of the second filter to an exhaust gas flow path downstream of the second filter;a valve operatively coupled to the bypass conduit, the valve moveable between a closed position in which the exhaust gas flows through the second filter, and an open position in which at least a portion of the exhaust gas flows through the bypass conduit so as to bypass the second filter; and determine whether a first filtration efficiency of the first filter is greater than a first filtration efficiency threshold or less than or equal to the first filtration efficiency threshold; and', 'control the valve such that the valve is more closed when the first filtration efficiency is less than or equal to the first filtration efficiency threshold than when the first filtration efficiency is greater the first filtration efficiency threshold, such that a larger portion of the exhaust gas flows through the second filter when the first filtration efficiency is less than the ...

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Номер записи: 51
03-02-2022 дата публикации

Control device for internal combustion engine

Номер: US20220034252A1
Автор: Kazumasa Katoh, Kenji Igawa, Kentaro MINEO, Takahiko Fujiwara
Принадлежит: Toyota Motor Corp

An apparatus includes circuitry configured to: calculate a temperature of exhaust flowing into an exhaust after-treatment system as a first exhaust temperature, calculate a temperature of exhaust flowing out from the exhaust after-treatment system as a second exhaust temperature, calculate a rate of change over time of the first exhaust temperature and a rate of change over time of the second exhaust temperature, and judge if the exhaust after-treatment system is in a removed state removed from the exhaust passage based on a difference between the rate of change over time of the first exhaust temperature and the rate of change over time of the second exhaust temperature.

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Номер записи: 52
19-01-2017 дата публикации

REGENERATION METHOD FOR EXHAUST-GAS AFTERTREATMENT SYSTEMS

Номер: US20170016368A1
Автор: Adam Frank, KUNERT Susanne, MUELLER SEBASTIAN, PALM David
Принадлежит: UMICORE AG & CO. KG

The present invention relates to a method for regenerating exhaust-gas aftertreatment systems capable of storing nitrogen oxides in lean exhaust gas, and in rich exhaust gas of reducing nitrogen oxides to nitrogen. The invention is used in exhaust-gas aftertreatment systems which consist of at least one NOx storage catalyst arranged near the engine and at least one NOx storage catalyst located in the underbody of the vehicle and are intended to clean the exhaust gas of spark-ignition engines predominantly run on a lean mixture. 1. A method for the regeneration of an exhaust gas aftertreatment system for predominantly lean-operated spark-ignition combustion engines having one or more nitrogen oxide storage catalysts arranged near the engine and one or more nitrogen oxide storage catalysts located in the underbody of the vehicle , characterized in that during the regeneration of the nitrogen oxide storage catalysts arranged near the engine , a complete emptying of these nitrogen oxide storage catalysts is not produced if the nitrogen oxide storage catalysts located in the underbody are within a temperature range in which ammonia is oxidized to form nitrous oxide.2. The method according to claim 1 ,characterized in that the exhaust gas aftertreatment system additionally has one or more three-way catalysts between the nitrogen oxide storage catalysts arranged near the engine and the engine.3. The method according to claim 1 ,characterized in thatthe regeneration is ended if the nitrogen oxide storage arranged near the engine is at most 90% emptied.4. The method according to claim 3 ,characterized in thatthe regeneration is performed only at a temperature of the nitrogen oxide storage catalysts in the underbody of the vehicle from 220-400° C.5. The method according to claim 1 ,characterized in thatthe regeneration is performed only at a temperature of the nitrogen oxide storage catalysts in the underbody of the vehicle from 220-400° C. The present invention relates to a ...

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Номер записи: 53
18-01-2018 дата публикации

INTERNAL COMBUSTION ENGINE CONTROL DEVICE

Номер: US20180016959A1
Автор: Fujii Hiroaki
Принадлежит:

An internal combustion engine control device includes a partially-plugged filter capturing particulate matter in an exhaust gas from an internal combustion engine, having a plurality of cells, and having a structure in which some of the cells are closed on an inlet side and at least one of the other cells is opened on an outlet side or a structure in which some of the cells are closed on the outlet side and at least one of the other cells is opened on the inlet side, a PM sensor detecting an amount of PM in the exhaust gas which has passed through the partially-plugged filter, and an estimation portion estimating an amount of deposited PM of the partially-plugged filter according to an amount of PM detected by the PM sensor and a PM capturing rate of the partially-plugged filter. 1. An internal combustion engine control device , comprising:a partially-plugged filter capturing particulate matter in an exhaust gas from an internal combustion engine, the partially-plugged filter having a plurality of cells, and the partially-plugged filter having a structure in which some of the cells are closed on an inlet side and at least one of the other cells is opened on an outlet side or a structure in which some of the cells are closed on the outlet side and at least one of the other cells is opened on the inlet side;a PM sensor detecting an amount of PM in the exhaust gas which has passed through the partially-plugged filter; andan estimation portion estimating an amount of deposited PM of the partially-plugged filter according to an amount of PM detected by the PM sensor and a PM capturing rate of the partially-plugged filter.2. The internal combustion engine control device according to claim 1 , whereinthe estimation portion changes the PM capturing rate used in an estimation of the amount of deposited PM, in response to the amount of deposited PM.3. The internal combustion engine control device according to claim 1 , whereinthe estimation portion changes the PM capturing ...

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Номер записи: 54
21-01-2016 дата публикации

DUAL HEGO METHOD FOR IDENTIFICATION AND MITIGATION OF AIR-FUEL IMBALANCE FAULTS

Номер: US20160018291A1
Автор: Jankovic Mrdjan J., Magner Stephen William, Santillo Mario Anthony, Uhrich Michael James
Принадлежит:

Systems and methods for identifying and mitigating air-fuel imbalance faults specific to an engine cylinder are provided. In one embodiment, a method comprises indicating a cylinder imbalance by comparing time-aligned readings from exhaust gas oxygen sensors, the exhaust gas oxygen sensors positioned symmetrically opposite each other within an exhaust passage downstream of a catalyst. In this way, an air-fuel imbalance fault may be accurately detected in a non-uniform exhaust flow so that mitigating actions can be taken, resulting in reduced tailpipe emissions. 1. A method , comprising:indicating a cylinder imbalance by comparing time-aligned readings from exhaust gas oxygen sensors, the exhaust gas oxygen sensors positioned symmetrically opposite each other within an exhaust passage downstream of a catalyst.2. The method of claim 1 , wherein comparing time-aligned readings from exhaust gas oxygen sensors comprises computing a ratio of the time-aligned readings from exhaust gas oxygen sensors.3. The method of claim 2 , wherein the cylinder imbalance is indicated when the ratio is outside a threshold range centered at one.4. The method of claim 3 , wherein the threshold range is based on an exhaust gas oxygen sensor setpoint.5. The method of claim 1 , wherein comparing time-aligned readings from exhaust gas oxygen sensors comprises computing a difference of the time-aligned readings from exhaust gas oxygen sensors.6. The method of claim 5 , wherein the cylinder imbalance is indicated when the difference is outside a threshold range centered at zero.7. The method of claim 6 , wherein the threshold range is based on an exhaust gas oxygen sensor setpoint.8. The method of claim 1 , wherein the exhaust gas oxygen sensors comprise two heated exhaust gas oxygen sensors.9. A method claim 1 , comprising:indicating a cylinder imbalance by comparing time-aligned readings from exhaust gas oxygen sensors, the exhaust gas oxygen sensors positioned symmetrically opposite each other ...

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Номер записи: 55
17-01-2019 дата публикации

METHOD AND SYSTEM FOR A PARTICULATE FILTER HAVING A BYPASS

Номер: US20190017423A1
Автор: Martin Douglas Raymond, Rollinger John Eric
Принадлежит:

Methods and systems are provided for an emission control device that includes a particulate filter with a bypass. In one example, a method includes bypassing the particulate filter when the exhaust gas has a decreased soot load and when the particulate filter has a decreased soot storage. The method further includes reducing the filter bypass flow and terminating or adjusting a deceleration fuel shut-off operation due to an exhaust temperature proximate to the particulate filter being above a threshold. 1. A method for an engine , comprising:responsive to decreased soot generation or decreased soot storage, flowing gasoline combustion exhaust gas to a particulate filter with increased filter bypass flow even when an exhaust temperature is above a first threshold; andresponsive to increased soot generation or increased soot storage, reducing the filter bypass flow and terminating deceleration fuel shut-off operation after a threshold duration due to exhaust temperature being above the first threshold.2. The method of claim 1 , wherein the exhaust temperature is a temperature of the particulate filter.3. The method of claim 1 , further comprising claim 1 , during the flowing gasoline combustion exhaust gas to the particulate filter with increased filter bypass flow claim 1 , and in response to a request to operate the engine with deceleration fuel shut-off claim 1 , operating the engine with deceleration fuel shut-off even when the exhaust temperature is above the first threshold.4. The method off claim 3 , further comprising terminating the deceleration fuel shut-off operation in response to an increase in operator-demanded torque.5. The method of claim 1 , further comprising commencing stoichiometric combustion at engine cylinders of the engine during the increased soot generation or increased soot storage upon terminating the deceleration fuel shut-off operation.6. The method of claim 1 , wherein the threshold duration is based on the exhaust temperature claim 1 , ...

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Номер записи: 56
17-01-2019 дата публикации

METHODS AND SYSTEM FOR DIAGNOSING A PARTICULATE FILTER SENSOR

Номер: US20190017427A1
Автор: Dudar Aed M.
Принадлежит:

Systems and methods for diagnosing operation of a sensor of an exhaust system are presented. In one example, the systems and methods may diagnose operation of the sensor when an engine is combusting air and fuel. Further, operation of the sensor may be diagnosed when the engine is not combusting air and fuel so that vehicle occupants may not be disturbed by the diagnostic. 1. A vehicle operating method , comprising:in response to an exhaust system sensor diagnostic request, rotating an engine in a reverse direction without fueling the engine;receiving data from a differential pressure sensor to a controller while rotating the engine in the reverse direction; andadjusting engine operation via the controller in response to the data from the differential pressure sensor.2. The method of claim 1 , where adjusting engine operation includes regenerating a particulate filter.3. The method of claim 1 , where adjusting engine operation includes limiting engine power output.4. The method of claim 1 , further comprising closing an engine intake throttle valve while rotating the engine in the reverse direction.5. The method of claim 1 , further comprising opening an engine intake throttle valve while rotating the engine in the reverse direction.6. The method of claim 1 , further comprising opening an engine intake throttle valve and closing an exhaust valve while rotating the engine in the reverse direction.7. The method of claim 1 , further comprising opening an engine intake throttle valve and opening an exhaust valve while rotating the engine in the reverse direction.8. The method of claim 1 , where adjusting engine operation via the controller in response to the data from the differential pressure sensor includes adjusting engine operation when the data from the differential pressure sensor indicates a pressure change between a first condition when an exhaust valve is open and a second condition when the exhaust valve is closed is less than a threshold.9. The method of ...

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Номер записи: 57
03-02-2022 дата публикации

Filtration systems with multitiered data exchange capabilities

Номер: US20220036663A1
Автор: Brian R. Tucker, Daniel E. Adamek, David W. Mulder, Matthew J. Anderson, Michael J. Lockert
Принадлежит: Donaldson Co Inc

Aspects herein include filtration systems with multitiered data exchange capabilities. In an embodiment, a filtration system with multitiered data exchange capabilities is included. The system can include a first data communication tier including a filter element, the filter element storing data, and a first sensor. The system can include a second data communication tier including a reader device in communication with the first sensor. The system can include a third data communication tier including an engine control unit (ECU) in communication with the reader device, wherein the ECU stores data. The second data communication tier receives data from the first data communication tier and the third data communication tier. The second data communication tier executes operations on the received data to create a processed data set. Further, the second data communication tier sends the processed data set to the third data communication tier. Other embodiments are also included herein.

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Номер записи: 58
22-01-2015 дата публикации

METHOD FOR CALCULATING THE NO2 CONTENT AT THE INLET OF A SELECTIVE REDUCTION CATALYST AND DEVICE FOR THE IMPLEMENTATION OF THIS METHOD

Номер: US20150020505A1
Автор: MAERTENS Steven
Принадлежит:

A method for the calculation of the NOcontent at the inlet of a selective catalytic reduction—SCR—device () of an exhaust system () with: an exhaust pipe (); a tank for a reducing agent and injection elements (); a first sensor () for measuring the concentration of nitrogen oxides upstream of the SCR; and a second sensor () for measuring the concentration of nitrogen oxides downstream of the SCR,includes the following stages: halting the injection of reducing agent; measuring the concentration of nitrogen oxides upstream and downstream of the SCR during a period of time; calculating the amount of NOaccumulated in the SCR during the period of time; and determining the NOcontent upstream of the SCR from the calculated amount of NOaccumulated per unit of time. 2. The method as claimed in claim 1 , characterized in that it is implemented when the corresponding engine is under stabilized operating conditions.322. The method as claimed in claim 1 , characterized in that the period of time during which the measurements of concentration of nitrogen oxides for the determination of the content of nitrogen dioxide are carried out is limited so that claim 1 , at the end of the measurement period claim 1 , the concentration of nitrogen oxides downstream is less than the concentration of nitrogen oxides upstream of the selective catalytic reduction device ().4. The method as claimed in claim 1 , characterized in that the calculation of the amount of nitrogen dioxide accumulated and the determination of the nitrogen dioxide content are carried out by calculating the difference between the concentrations of nitrogen oxides between the upstream and the downstream of the selective catalytic reduction device as a function of the time and by then integrating this difference as a function of the time in order finally to divide the value obtained by the length of the period of time under consideration.52024. The method as claimed in claim 4 , characterized in that the calculation of the ...

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Номер записи: 59
21-01-2021 дата публикации

Automated Diesel Exhaust Fluid (DEF) System and Method

Номер: US20210017890A1
Автор: Schmidt Brennan
Принадлежит:

An automated diesel exhaust fluid (DEF) system and method for refilling DEF. The automated DEF system provides DEF refilling after an initial setup and without manual intervention. The automated DEF system includes a electric DEF flow control device that controls the flow of DEF. The electric DEF flow control device may include control circuitry, an electrics enclosure that encloses the control circuity, an electric fluid sensor, a valve, a beacon light, a status light, a button, a threaded swivel connection, and a mandrel on the inside of the threaded swivel connection. 1. A diesel exhaust fluid (DEF) refilling system , comprising:a supply tank comprising DEF;a supply line connecting the supply tank to a DEF tank configured to supply DEF to a diesel engine; an enclosure containing control circuity;', 'a valve having an inlet and an outlet and moveable between an open position and a closed position, the open position configured to permit DEF flow through the valve and the closed position configured to block DEF flow through the valve, the valve outlet in fluid communication with the DEF tank;', 'a valve actuator operable to move the valve between the open position and the closed position;', 'an electric fluid sensor disposed in a sensor housing and comprising a shaft extending into the DEF tank, the shaft comprising a slot such that the electric fluid sensor senses DEF when the slot is submerged; and', 'a battery configured to power the control circuity, the valve actuator, and the electric fluid sensor,', 'wherein the control circuity comprises logic configured to move the valve between the open position and the closed position in response to a signal provided by the electric fluid sensor., 'a DEF flow control device in fluid communication with the supply line, the DEF flow control device comprising2. The system of claim 1 , comprising a feeder line claim 1 , the feeder line further connecting the supply line to the DEF tank.3. The system of claim 1 , wherein the ...

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Номер записи: 60
21-01-2021 дата публикации

Gasoline particulate filter brick detection techniques

Номер: US20210017892A1
Автор: Jaideep Singh
Принадлежит: Individual

A gasoline particulate filter (GPF) diagnostic technique utilizes an upstream temperature sensor arranged at an upstream point relative to a GPF brick that the GPF is configured to house and configured to measure an upstream temperature of exhaust gas produced by an engine, a downstream temperature sensor arranged at a downstream point relative to the GPF brick and configured to measure a downstream temperature of the exhaust gas produced by the engine, and a controller configured to detect whether the GPF brick is damaged or missing based on a temperature difference between the upstream and downstream exhaust gas temperatures, a set of temperature thresholds, and a current operational mode of the engine.

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Номер записи: 61
28-01-2016 дата публикации

EXHAUST TREATMENT SYSTEM THAT GENERATES DEBOUNCE DURATION FOR NOX SENSOR OFFSET

Номер: US20160024988A1
Автор: Shetney Justin Adam, Whitt Christopher
Принадлежит:

An exhaust treatment system configured to treat exhaust gas generated by an internal combustion engine includes a reductant delivery system that injects a reductant solution into an exhaust gas. A selective catalyst reduction (SCR) device reacts with the reductant solution to reduce NOx from the exhaust gas. A control module is in electrical communication with the SCR device and the reductant delivery system. The control module determines at least one of an injection status of the reduction delivery system and a performance of the SCR device. The control module further determines at least one debounce time for delaying diagnosis of a NOx sensor based on at least one of the injection status and the performance of the SCR device. 1. An exhaust treatment system configured to treat exhaust gas generated by an internal combustion engine , the exhaust treatment system comprising:a reductant delivery system configured to inject a reductant solution into an exhaust gas;a selective catalyst reduction (SCR) device that reacts with the reductant solution to reduce NOx from the exhaust gas; anda control module in electrical communication with the SCR device and the reductant delivery system, the control module configured to determine at least one of an injection status of the reduction delivery system and a performance of the SCR device, and to determine at least one debounce time based on at least one of the injection status and the performance of the SCR device.2. The exhaust treatment system of claim 1 , further comprising:a NOx sensor disposed downstream from the SCR device, the NOx sensor configured to determine a level of the NOx in the exhaust gas,wherein the control module detects an overrun condition of the engine prior to determining the at least one debounce time, and diagnoses the NOx sensor after the at least one debounce time is satisfied.3. The exhaust treatment system of claim 2 , wherein the control module includes:an electronic SCR performance module ...

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Номер записи: 62
28-01-2016 дата публикации

EXHAUST GAS PURIFICATION APPARATUS FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20160025026A1
Автор: Iwazaki Yasushi, Kitaura Koichi, Kubo Masahiro
Принадлежит:

The sulfur poisoning of a three-way catalyst is intended to be detected with a high degree of accuracy. It is determined whether the sulfur poisoning of the three-way catalyst is made to be recovered, or a determination is made that the degree of sulfur poisoning of the three-way catalyst is higher when the concentration of NOx detected by an NOx sensor is high than when it is low, based on the concentration of NOx downstream of the three-way catalyst after the air fuel ratio of the exhaust gas flowing into the three-way catalyst has been made to change from a rich air fuel ratio to a lean air fuel ratio and before the air fuel ratio of the exhaust gas flowing out of the three-way catalyst changes to a lean air fuel ratio. 1. An exhaust gas purification apparatus for an internal combustion engine comprising:a three-way catalyst that is arranged in an exhaust passage of the internal combustion engine and has an oxygen storage ability;an NOx sensor that is arranged in the exhaust passage at a location downstream of said three-way catalyst, and configured to detect a concentration of NOx in exhaust gas;an air fuel ratio sensor that is arranged in the exhaust passage at a location downstream of said three-way catalyst, and configured to detect an air fuel ratio of the exhaust gas;an air fuel ratio control unit configured to change the air fuel ratio of the exhaust gas flowing into said three-way catalyst; anda determination unit configured to determine whether sulfur poisoning of said three-way catalyst is made to be recovered, or make a determination that the degree of sulfur poisoning of said three-way catalyst is higher when the concentration of NOx detected by said NOx sensor is high than when it is low, based on the concentration of NOx detected by said NOx sensor after the air fuel ratio of the exhaust gas has been changed from a rich air fuel ratio to a lean air fuel ratio by means of said air fuel ratio control unit and before the air fuel ratio detected by said ...

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Номер записи: 63
25-01-2018 дата публикации

INTERNAL COMBUSTION ENGINE AND EXHAUST-GAS-COMPONENT ESTIMATING METHOD

Номер: US20180023430A1
Автор: HIGASHIYAMA Shigeru
Принадлежит:

An internal combustion engine, which includes a collection device that is arranged in an exhaust pipe through which an exhaust gas emitted from a cylinder passes and collects PM contained in the exhaust gas and an NOx sensor that is arranged on an upstream side of the collection device and detects an NOx content in the exhaust gas, includes: an estimating device which estimates a PM content in the exhaust gas at the upstream side of the collection device from a detection value of the NOx sensor, based on a trade-off relation between an NOx emission amount and a PM emission amount from the cylinder. 1. An internal combustion engine , which includes a collection device that is arranged in an exhaust pipe through which an exhaust gas emitted from a cylinder passes and collects PM contained in the exhaust gas and an NOx sensor that is arranged on an upstream side of the collection device and detects an NOx content in the exhaust gas , comprising:an estimating device which estimates a PM content in the exhaust gas at the upstream side of the collection device from a detection value of the NOx sensor, based on a trade-off relation between an NOx emission amount and a PM emission amount from the cylinder.2. The internal combustion engine according to claim 1 ,wherein the estimating device is configured to estimate the PM content in the exhaust gas at the upstream side of the collection device, with reference to a detection value of the NOx sensor and a trade-off map in which the NOx emission amount and the PM emission amount are set in advance in each of operating conditions of the internal combustion engine.3. The internal combustion engine according to claim 1 ,wherein the estimating device is configured to estimate a variation of the PM content in the exhaust gas at the upstream side of the collection device by multiplying the PM emission amount calculated based on the operating condition of the internal combustion engine and an inverse number of a ratio of change of a ...

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Номер записи: 64
24-01-2019 дата публикации

METHODS FOR CONTROLLING AND MONITORING OXIDATION CATALYST DEVICES

Номер: US20190024557A1
Автор: Esposito Raffaele, LATROFA Giacomo, MONTINARO Giovanni
Принадлежит:

Exhaust gas systems includes an oxidation catalyst (OC) capable of receiving exhaust gas and oxidizing one or more of combustable hydrocarbons (HC) and one or more nitrogen oxide (NOx) species, a selective catalytic reduction device (SCR) disposed downstream from and in fluid communication with the OC, an upstream NOx sensor disposed upstream from the SCR, and a downstream NOx sensor disposed downstream from the SCR. Methods for controlling systems include providing exhaust gas to the OC and subsequently the SCR, measuring an upstream exhaust gas NOx concentration, measuring a downstream exhaust gas NOx concentration, determining a NOx differential by subtracting the downstream exhaust gas NOx concentration from the upstream exhaust gas NOx concentration; and comparing the NOx differential to a differential threshold to determine OC catalytic performance. The method is conducted under while OC is above a NOx to NH3 conversion yield threshold, and/or under rich conditions. 2. The method of claim 1 , wherein the exhaust gas provided to the OC comprises rich-phase exhaust gas generated by an internal combustion engine.3. The method of claim 1 , wherein the upstream NOx sensor is disposed upstream from the OC.4. The method of claim 1 , wherein the OC is above an NHconversion yield threshold.5. The method of claim 1 , wherein the CC comprises one or more platinum group metals.6. The method of claim 1 , wherein the SCR comprises a selective catalytic reduction filter device.7. The method of claim 1 , wherein the upstream NOx sensor and the downstream NOx sensor are each cross-sensitive to NOx and NH3.8. A method for diagnosing an exhaust gas treatment system claim 1 , wherein the system comprises an oxidation catalyst device (OC) including a catalytic composition (CC) and capable of receiving exhaust gas and oxidizing one or more of combustable hydrocarbons (HC) and one or more nitrogen oxide (NOx) species claim 1 , a selective catalytic reduction device (SCR) disposed ...

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Номер записи: 65
24-01-2019 дата публикации

MODEL-BASED MONITORING FOR SELECTIVE CATALYTIC REDUCTION DEVICE IN AFTERTREATMENT ASSEMBLY

Номер: US20190024563A1
Автор: TUNINETTI Alessia, Wang Yue-Yun, Zhu Yongjie
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An aftertreatment assembly includes a selective catalytic reduction (SCR) device having a catalyst and configured to receive an exhaust gas. A controller is operatively connected to the SCR device. The controller having a processor and a tangible, non-transitory memory on which is recorded instructions for executing a method of model-based monitoring of the SCR device. The method relies on a physics-based model that may be implemented in a variety of forms. The controller is configured to obtain at least one estimated parameter, and at least one threshold parameter based at least partially on a catalyst degradation model. The catalyst degradation model is based at least partially on a predetermined threshold storage capacity (Θ). A catalyst status is determined based on a comparison of the estimated and threshold parameters. The operation of the assembly is controlled based at least partially on the catalyst status. 1. An aftertreatment assembly comprising:a selective catalytic reduction (SCR) device having a catalyst and configured to receive an exhaust gas;a controller operatively connected to the SCR device, the controller having a processor and a tangible, non-transitory memory on which is recorded instructions for executing a method of model-based monitoring of the SCR device; obtain at least one estimated parameter, including obtaining an estimated nitrogen oxide (NOx) concentration in the exhaust gas exiting the SCR device;', {'sub': T', 'T, 'obtain at least one threshold parameter based at least partially on a catalyst degradation model, including obtaining a threshold NOx concentration (y) in the exhaust gas exiting the SCR device, the catalyst degradation model being based at least partially on a predetermined threshold storage capacity (Θ);'}, 'determine a catalyst status based on a comparison of the at least one estimated parameter and the at least one threshold parameter; and', 'control operation of the assembly based at least partially on the catalyst ...

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Номер записи: 66
24-01-2019 дата публикации

ABNORMALITY DIAGNOSIS SYSTEM FOR EXHAUST GAS PURIFICATION APPARATUS

Номер: US20190024564A1
Автор: Kidokoro Toru, Takaoka Kazuya
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

An object of the disclosure is to provide a technology that enables abnormality diagnosis of an NOx trap catalyst to make the diagnosis that the NOx trap catalyst is abnormal even if the degree of deterioration of the NOx trap catalyst, is relatively small yet. When performing abnormality diagnosis of an NOx trap catalyst, a system according to the disclosure performs a lean temperature raising process, which is the process of raising the temperature of the NOx trap catalyst to or above a predetermined temperature while keeping the air-fuel ratio of the exhaust gas flowing into the NOx trap catalyst at a lean air-fuel ratio. The system diagnoses abnormality of the NOx trap catalyst on the basis of the NOx storage efficiency of the NOx trap catalyst or a parameter correlating with that NOx storage efficiency after the completion of the lean temperature raise process. 1. An abnormality diagnosis system for an exhaust gas purification apparatus including an NOx trap catalyst prodded in an exhaust passage of an internal combustion engine that operates in a lean burn mode to store NOx in exhaust gas , comprising:a controller comprising at least one processor configured toperform a lean temperature raise process, which is the process of raising the temperature of said NOx trap catalyst to above predetermined temperature while keeping the air-fuel ratio of the exhaust gas flowing into said NOx trap catalyst at a lean air-fuel ratio higher than the theoretical air-fuel ratio, when a specific abnormality diagnosis condition is met; anddiagnose abnormality of said NOx trap catalyst on the basis of the NOx storage efficiency of said NOx trap catalyst or a parameter correlating with that NOx storage efficiency after the completion of said lean temperature raise process.2. An abnormality diagnosis system for an exhaust gas purification apparatus according to claim 1 , wherein said predetermined temperature is a temperature at which NOx stored in said NOx trap catalyst can be ...

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Номер записи: 67
24-01-2019 дата публикации

A METHOD AND A SYSTEM FOR DETERMINING A PERFORMANCE OF A PARTICULATE FILTER OF AN ENGINE

Номер: US20190024565A1
Автор: BÖKELUND Björn, NYLÉN Lars-Göran
Принадлежит: SCANIA CV AB

The invention relates to a method for determining a performance of a particulate filter of an engine, comprising: determining at least one exhaust gas temperature upstream of said particulate filter; determining an exhaust gas temperature downstream of said particulate filter; determining an exhaust gas mass flow upstream of said particulate filter; determining a modelled temperature on the basis of said at least one exhaust gas temperature upstream of said particulate filter and said exhaust gas mass flow upstream of said particulate filter; determining a residual value on the basis of said exhaust gas temperature downstream of said particulate filter and said modelled temperature; and determining an equivalent hole size of said particulate filter from a predetermined function regarding a relation between said residual value and equivalent hole size as a basis for considering said performance of said particulate filter. 1. A method for determining a performance of a particulate filter of an engine , comprising:determining at least one exhaust gas temperature upstream of said particulate filter;determining an exhaust gas temperature downstream of said particulate filter;determining an exhaust gas mass flow upstream of said particulate filter;determining a modelled temperature on the basis of said at least one exhaust gas temperature upstream of said particulate filter and said exhaust gas mass flow upstream of said particulate filter;determining a residual value on the basis of said exhaust gas temperature downstream of said particulate filter and said modelled temperature; anddetermining an equivalent hole size of said particulate filter from a predetermined function regarding a relation between said residual value and equivalent hole size as a basis for considering said performance of said particulate filter.2. The method according to claim 1 , comprising:further determining a temperature difference over said particulate filter regarding said exhaust gas ...

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Номер записи: 68
24-01-2019 дата публикации

METHOD OF EXPECTING N20 GENERATION ACCORDING TO OXIDATION OF NH3 IN SDPF

Номер: US20190024567A1
Автор: JOO Ki Hyung
Принадлежит:

A method of expecting NO generation according to oxidation of NHin an SDPF according to an exemplary embodiment of the present invention may include measuring an initial NHabsorption amount in the SDPF, determining a first middle NH=3 absorption amount by subtracting an NHslip amount in the SDPF from the initial NHabsorption amount in the SDPF, determining a second middle NHabsorption amount by subtracting an NHamount oxidizing to NOand Nfrom the first middle NHabsorption amount, determining NO generation amount in the SDPF, and determining a final NHabsorption amount in the SDPF by subtracting the NO generation amount from the second middle NHabsorption amount. 1. Method of expecting NO generation according to oxidation of NHin a selective catalytic reduction on diesel particulate filer (SDPF) , comprising:{'sub': '3', 'measuring an initial NHabsorption amount in the SDPF;'}{'sub': 3', '3', '3, 'determining a first middle NHabsorption amount by subtracting an NHslip amount in the SDPF from the initial NHabsorption amount in the SDPF;'}{'sub': 3', '3', 'x', '2', '3, 'determining a second middle NHabsorption amount by subtracting an NHamount oxidizing to NOand Nfrom the first middle NHabsorption amount;'}{'sub': '2', 'determining an NO generation amount in the SDPF; and'}{'sub': 3', '2', '3, 'determining a final NHabsorption amount in the SDPF by subtracting the NO generation amount from the second middle NHabsorption amount.'}2. The method of claim 1 , wherein{'sub': '3', 'in determining the first middle NHabsorption amount,'}{'sub': 3', '3', '3, 'the NHslip amount in the SDPF is a value determined by multiplying the initial NHabsorption amount and an NHslip factor.'}3. The method of claim 1 , wherein{'sub': '3', 'in determining the second middle NHabsorption amount,'}{'sub': 3', 'x', '2', '3', 'x', '2, 'the NHamount oxidizing to NOand Nis a value determined by multiplying the first middle NHabsorption amount and an oxidation factor oxidizing to NOand N.'}4. The ...

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Номер записи: 69
23-01-2020 дата публикации

METHOD AND SYSTEM FOR IMPROVING DIAGNOSIS OF A CATALYST

Номер: US20200025056A1
Автор: Bagnasco Andrew, Fredericks Edward, Santillo Mario
Принадлежит:

Methods and systems are provided for diagnosing operation of a catalyst in the presence of oxygen sensor degradation over a vehicle life cycle. The methods and systems described herein filter the output of one oxygen sensor according to a time constant of a different oxygen sensor so that determination of a catalyst index ratio is compensated for oxygen sensor degradation. 1. An engine operating method , comprising:filtering output of an oxygen sensor located upstream of a catalyst in an exhaust system of an engine via a controller according to response of an oxygen sensor located downstream of the catalyst; andadjusting an actuator via the controller responsive to the filtered output of the oxygen sensor.2. The method of claim 1 , where the actuator is a fuel injector and where the fuel injector is adjusted to reduce an amplitude of an engine air-fuel ratio.3. The method of claim 1 , where the actuator is a fuel injector and where the fuel injector is adjusted to increase a frequency of an engine air-fuel ratio.4. The method of claim 1 , where filtering includes digitally filtering output of the oxygen sensor located upstream of the catalyst.5. The method of claim 1 , where filtering includes applying a first order low-pass filter having a time constant or a smoothing factor that is based on output of the oxygen sensor located downstream of the catalyst.6. The method of claim 1 , where filtering includes adding a weighted past output of the oxygen sensor located upstream of the catalyst to a weighted present output of the oxygen sensor located upstream of the catalyst.7. The method of claim 1 , where the oxygen sensor located upstream of the catalyst is a wide band linear oxygen sensor.8. The method of claim 1 , where actuator is an ignition system.9. An engine operating method claim 1 , comprising:entering an engine into a fuel cut-off mode via a controller;estimating a time constant of an oxygen sensor located downstream of a catalyst in an exhaust system of the ...

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Номер записи: 70
28-01-2021 дата публикации

PARTICULATE MATTER SENSOR HARDWARE PROTECTION IN AFTER-RUN

Номер: US20210025312A1
Автор: Axe Bryan D., Cannarile Francesco, Di Venti Gaetano
Принадлежит:

A method for mitigating against failure of a particulate matter sensor of an automobile vehicle includes: determining if a key-off event is present, identifying an engine is off in a vehicle after-run mode; defining when local environmental conditions are outside of mechanical limits of a particulate matter (PM) sensor; identifying input values to reverse the local environmental conditions of the PM sensor; and controlling operation of a heating element of the PM sensor to achieve the input values to reverse the local environmental conditions during the vehicle after-run mode. 1. A method for mitigating against failure of a particulate matter sensor of an automobile vehicle , comprising:determining a range of moisture conditions to identify when liquid water is present in a particulate matter (PM) sensor and in a vehicle exhaust system;confirming an engine is in an after-run mode;determining if enablement criteria for operation of a heating element of the PM sensor are met by performing a check of a vehicle odometer to identify if a reading of the vehicle odometer is less than a predetermined threshold value, wherein if the reading of the vehicle odometer is less than the predetermined threshold value, performing a calibration to determine a maximum heating time to maximize water removal from the PM sensor;initiating operation of the heating element of the PM sensor; andoperating the heating element for a predetermined period of time less than or equal to the maximum heating time at a predetermined temperature to remove the liquid water from the PM sensor while the engine is in the after-run mode.2. The method for mitigating against failure of the particulate matter sensor of the automobile vehicle of claim 1 , further including signaling a predetermined dew point of the vehicle exhaust system using a modeled dew point location within the vehicle exhaust system.3. The method for mitigating against failure of the particulate matter sensor of the automobile vehicle of ...

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Номер записи: 71
01-02-2018 дата публикации

REAGENT DOSER DIAGNOSTIC SYSTEM AND METHOD

Номер: US20180028976A1
Автор: MCAVOY Paul C., McDaniel Mickey R., Qi Baohua, Singh Balbahadur, XI Clyde W.
Принадлежит: Cummins Emission Solutions Inc.

Systems and methods are disclosed for determining or diagnosing a reagent dosing system failure to provide sufficient reagent to an exhaust aftertreatment system that includes an SCR catalyst to satisfy a reagent dosing command. 114.-. (canceled)15. A system comprising:a storage tank for storing a reagent;a doser fluidly connected to the storage tank and configured to receive reagent from the storage tank, wherein the doser is configured to be connected to an exhaust system and the doser comprises a pump operable to pressurize the reagent while injecting a predetermined quantity of the reagent into the exhaust system over a dosing cycle to satisfy a dosing command;a pressure sensor associated with the doser and operable to indicate a pressure of the reagent downstream of the pump;a controller connected to the pump and configured to operate the pump via feedback control from the pressure sensor to maintain a pressure of the reagent during the dosing cycle; identify a diagnostic dosing period in the dosing cycle during which to diagnose a fault condition of the dosing system in satisfying the dosing command,', 'suspend feedback control of the pump and maintain a constant speed of the pump while injecting reagent during the diagnostic dosing period, and', 'determine a fault condition of the dosing system in response to a pressure drop measured by the pressure sensor during the diagnostic dosing period., 'wherein the controller is further configured to16. The system of claim 15 , wherein the doser further comprises an accumulator downstream of the pump and the pressure sensor is connected to the accumulator.17. The system of claim 15 , wherein the doser is connected to an injector that is coupled to the exhaust system and operably connected to the controller.18. The system of claim 15 , wherein the controller is configured to determine that the fault condition of the dosing system is failed when the pressure drop is less than a predetermined threshold. Selective ...

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Номер записи: 72
02-02-2017 дата публикации

ABNORMALITY DIAGNOSIS APPARATUS FOR NOx STORAGE REDUCTION CATALYST

Номер: US20170030244A1
Автор: Hagiwara Koji, Iwazaki Yasushi, Kidokoro Toru
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

An apparatus according to the present invention is adapted to calculate an NOstorage rate defined as the rate of the quantity of NOstored into the NSR catalyst to the quantity of NOflowing into the NSR catalyst, based on quantity of NOflowing into the NSR catalyst and the quantity of NOflowing out of the NSR catalyst in a state in which the amount of NOstored in the NSR catalyst is equal to or larger than the breakthrough start amount of a criterion catalyst and the flow rate of exhaust gas flowing through the NSR catalyst is equal to or higher than a predetermined lower limit flow rate. The apparatus diagnoses the NSR catalyst as normal if the NOstorage rate thus calculated is equal to or higher than a predetermined threshold and as abnormal if the NOstorage rate is lower than the predetermined threshold. 1. An abnormality diagnosis apparatus for an NOstorage reduction catalyst applied to an internal combustion engine capable of operating in a lean-burn mode and provided with an NOstorage reduction catalyst arranged in an exhaust passage and having the capability of storing NOcontained in exhaust gas flowing into it and the capability of reducing NOstored in it and an NOsensor arranged in said exhaust passage downstream of said NOstorage reduction catalyst ,the abnormality diagnosis apparatus comprising:a controller comprising at least one processor configured to:{'sub': 'X', 'obtain the flow rate of exhaust gas flowing through said NOstorage reduction catalyst;'}{'sub': X', 'X', 'X, 'obtain an inflowing NOquantity defined as the quantity of NOflowing into said NOstorage reduction catalyst;'}{'sub': X', 'X', 'X', 'X, 'obtain an outflowing NOquantity defined as the quantity of NOflowing out of said NOstorage reduction catalyst, based on an output of said NOsensor;'}{'sub': X', 'X', 'X', 'X, 'calculate an NOstorage amount defined as the amount of NOstored in said NOstorage reduction catalyst, based on the obtained inflowing NOquantity;'}{'sub': X', 'X', 'X', 'X', 'X ...

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Номер записи: 73
02-02-2017 дата публикации

Method and system for monitoring of a physical quantity related to a particulate mass in at least one exhaust pipe

Номер: US20170030245A1
Автор: Björn BÖKELUND, Karolin ERWE
Принадлежит: SCANIA CV AB

Methods and systems are provided to monitor a quantity relating to particulate mass M in at least one exhaust pipe arranged downstream of a combustion engine. A first determination device determines a reduction Δ of a pressure difference dP over at least one or several particulate filters, arranged downstream of the combustion engine. This reduction Δ is related to a pressure difference dP ref over one or more corresponding reference particulate filters. A second determination device determines a quantity related to the particulate mass M, based on the determined reduction Δ of the pressure difference dP and a predetermined correlation between the reduction Δ and the quantity related to the particulate mass M, so that use of soot sensors in the exhaust pipe may be avoided. A comparison device compares the quantity with a defined threshold value M th and a providing device provides indications related to the comparison.

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Номер записи: 74
04-02-2016 дата публикации

Aftertreatment system having multiple dosing circuits

Номер: US20160032801A1
Автор: Eric Tyler Alig, Faith Juliet McKenzie, Jinhui Sun, Matthew Colin Mowers, Scott Charles Morris
Принадлежит: Caterpillar Inc

An aftertreatment system is disclosed for use with a combustion engine. The aftertreatment system may have at least one exhaust passage, and a plurality of dosing circuits configured to inject reductant into the at least one exhaust passage. The aftertreatment system may also have a controller in communication with each of the plurality of dosing circuits. The controller may be configured to determine a failure of a first of the plurality of dosing circuits, and to selectively adjust operation of a second of the plurality of dosing circuits based on the failure.

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Номер записи: 75
01-02-2018 дата публикации

DUAL INJECTION DURING INTAKE STROKE FOR IMPROVED CATALYST LIGHT OFF

Номер: US20180030918A1
Автор: Gwidt Jesse Michael, Hattar Rafat F., Hutmacher Jeffrey M.
Принадлежит:

A method for operating a spark-ignition direct-injection internal combustion engine coupled to an exhaust aftertreatment system including a catalytic converter includes monitoring an operating state of the catalytic converter. The method further includes determining if a piston of the engine is entering an intake stroke. The method further includes injecting a first quantity of fuel into a cylinder in which the piston of the engine is entering the intake stroke, and injecting a second quantity of fuel into the cylinder in which the piston of the engine is entering the intake stroke. 1. A method for operating a spark-ignition direct-injection internal combustion engine coupled to an exhaust aftertreatment system including a catalytic converter , the method comprising:monitoring an operating state of the catalytic converter;determining if a piston of the engine is entering an intake stroke;injecting a first quantity of fuel into a cylinder in which the piston of the engine is entering the intake stroke; andinjecting a second quantity of fuel into the cylinder in which the piston of the engine is entering the intake stroke.2. The method of claim 1 , wherein monitoring an operating state of the catalytic converter further comprises determining the temperature of the catalytic converter.3. The method of claim 1 , wherein monitoring an operating state of the catalytic converter further comprises predicting the temperature of the catalytic converter.4. The method of claim 1 , wherein determining if a piston of the engine is entering an intake stroke further comprises monitoring a crank shaft position of the engine.5. The method of claim 4 , wherein injecting a first quantity of fuel into a cylinder further comprises injecting the first quantity of fuel into the cylinder when a first threshold crank position has been reached.6. The method of claim 5 , further comprising waiting a predetermined interval of time after injecting the first quantity of fuel into the cylinder.7. ...

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Номер записи: 76
05-02-2015 дата публикации

Temperature gradient correction of ammonia storage model

Номер: US20150033704A1
Автор: James M. Perrin, Justin Adam Shetney, Paul Jasinkiewicz, Raffaello Ardanese
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An exhaust gas treatment system includes a SCR device that stores a reductant that reacts with the NOx emissions and a reductant supply system to inject the reductant according to a reductant load model. At least one temperature sensor or model generates a temperature signal indicating an SCR temperature of the SCR device. The exhaust gas treatment system further includes a control module in electrical communication with the reductant supply system. The control module is configured to determine an amount of reductant that slips from the SCR device based on the at least one temperature signal and the rate of change of the SCR temperature. The control module further determines a correction factor based on the amount of slipped reductant to modify the reductant load model.

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Номер записи: 77
05-02-2015 дата публикации

METHOD AND APPARATUS FOR DETERMINING THE EFFICIENCY OF AN EXHAUST GAS PURIFICATION DEVICE

Номер: US20150033706A1
Автор: PFAFFINGER Andreas
Принадлежит:

A method for determining the efficiency of an exhaust gas purification device of a diesel internal combustion engine for motor vehicles, having a first NOx sensor, arranged ahead of an oxidation catalyst and/or a particulate filter, and a second NOx sensor, arranged downstream of a reduction catalyst, and having a device for the metered supply of a reducing agent, wherein the method includes feeding the signals from the two NOx sensors are fed to a control unit, by means of which at least one feed quantity of the reducing agent is specified. To determine an efficiency of the oxidation catalyst and/or of the particulate filter, the NO and NO2 concentration and/or the NO2/NO ratio of the exhaust gas flow at the measurement position of the second NOx sensor and/or downstream of the reduction catalyst is determined by the control unit solely of the signal values acquired by the two NOx sensors 1. A method for determining the efficiency of an exhaust gas purification device of an internal combustion engine , the purification device having at least one of an oxidation catalyst and a particulate filter , a reduction catalyst , a first NOx sensor arranged upstream of that at least one of an oxidation catalyst and a particulate filter , a second NOx sensor arranged downstream of the reduction catalyst , a device for metered supply of a reducing agent , and a control unit , the method comprising the steps of:feeding signals from the first NOx sensor and the second NOx sensor to the control unit to specify a feed quantity of the reducing agent; anddetermining, by the control unit, an efficiency of the at least one of an oxidation catalyst and a particulate filter by determining at least one of an NO2/NO ratio and the NO and NO2 concentration of the exhaust gas flow at a measurement zone of the second NOx sensor solely using the signals from the first NOx sensor and the second NOx sensor.2. The method according to claim 1 , wherein the internal combustion engine is a diesel ...

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Номер записи: 78
05-02-2015 дата публикации

METHOD FOR MONITORING AN EXHAUST SYSTEM

Номер: US20150033837A1
Автор: NIEMEYER Jens, Spaeder Tim, Toth Aron
Принадлежит:

A method and an arrangement for monitoring an exhaust system of an internal combustion engine. Temperature profiles upstream and downstream of an installation location of a catalytic converter are measured in order to determine whether or not a catalytic converter is installed. 19-. (canceled)10. A method for monitoring an exhaust system of an internal combustion engine , which exhaust system is provided for discharging , in a flow direction , exhaust gases that are generated by the internal combustion engine , wherein , in the exhaust system , there is provided an installation location suitable for the installation of a catalytic converter , the method comprising the steps of: measuring a first temperature profile upstream of the installation location as viewed in a flow direction of the exhaust gas; measuring a second temperature profile downstream of the installation location as viewed in the flow direction; determining an expected temperature profile downstream of the installation location based on the measured first temperature profile upstream of the installation location; and comparing the determined expected temperature profile downstream of the installation location with the measured second temperature profile downstream of the installation location to determine whether the catalytic converter is installed at the installation location , wherein an area between the two profiles is evaluated.11. The method as claimed in claim 10 , wherein the method is carried. out during a temperature step change.12. The method as claimed in claim 10 , wherein the expected temperature profile downstream of the installation location is determined using a simulation.13. The method as claimed in claim 10 , wherein the exhaust system has an SCR catalytic converter.14. The method as claimed in claim 10 , further including recording a fault in a memory when there is a predefinable deviation between the determined expected temperature profile downstream of the installation location ...

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Номер записи: 79
05-02-2015 дата публикации

REGENERATION OF DIESEL PARTICLE FILTER

Номер: US20150033943A1
Автор: Bevan Neil, Koster Peter, Rawlinson Nicholas, Weatherall David
Принадлежит: JAGUAR LAND ROVER LIMITED

Regeneration of a diesel particle filter of an internal combustion engine of a vehicle is controlled according to soot mass loading and the vehicle operating condition. Regeneration modes include active regeneration and forced passive regeneration, and operating conditions include highway, town and off-road driving. One strategy may determine initiation of regeneration, and another may determine cessation. Regeneration mode may change in real time. 1. A method of determining in a vehicle whether to regenerate a diesel particle filter by active regeneration or by forced passive regeneration , the method comprising:determining a current soot mass of a diesel particle filter;determining an operating condition of the vehicle;optionally determining, in addition to said operating condition, at least one of a vehicle speed, an engine speed, a characteristic of the vehicle exhaust, a temperature of an engine or a temperature of an exhaust system;determining whether the current soot mass of the diesel particle filter is in a permissible regeneration range indicated by the determined operating condition; andif within said range, initiating one of active regeneration and forced passive regeneration of the diesel particle filter.2. A method according to claim 1 , wherein said range has a lower value greater than 20% of maximum soot mass.3. A method according to or claim 1 , and comprising a single range for each operating condition of the vehicle.4. A method according to claim 3 , wherein for each operating condition claim 3 , one of active regeneration and forced passive regeneration is initiated.5. A method according to claim 4 , wherein a lower value for initiating regeneration is inversely related to vehicle speed.6. A method according to any preceding claim claim 4 , wherein the operating conditions include on-road driving and off-road driving.76. A method according to any of - claims 1 , wherein the operating conditions include one or more of:low/high transmission range, ...

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Номер записи: 80
17-02-2022 дата публикации

Method and device for controlling at least one scr catalytic converter of a vehicle

Номер: US20220049637A1
Автор: Michael ABT
Принадлежит: FPT Motorenforschung AG

A method for controlling a SCR catalytic converter of a vehicle, comprising a first step of modelling said at least one SCR catalytic converter as a plurality of NH3 storage cells (cell1, cell2, . . . , celln; cell1, cell2 . . . celln, cell1, cell2, . . . , celln), a second step of controlling only a first (cell1) of said plurality of storage cells, according to feedback control based on a reference value, and a third step of adapting said reference value on the basis of a storage level of at least another storage cell of said plurality of storage cells, wherein said first storage cell is arranged at an inlet of said SCR catalytic converter according an exhaust gas circulation.

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Номер записи: 81
17-02-2022 дата публикации

Methods for making and using scr catalyst on-board diagnostic limit parts

Номер: US20220049639A1
Автор: Isaac STARK, Varun RAMESH
Принадлежит: PACCAR INC

A method of manufacturing an on-board diagnostic (OBD) limit part and a method of testing to evaluate an OBD system. The method of manufacturing the OBD limit part includes introducing a contaminant to a selective catalytic reduction (SCR) catalyst and contacting the contaminant with the SCR catalyst for a selected period of time. The method of manufacturing utilizes a vessel, the contaminant, and the SCR catalyst. The OBD limit part is a combination of the contaminant and the SCR catalyst within the vessel. The method of testing to evaluate the OBD system includes collecting data related to an exhaust gas before and after the exhaust gas is exposed to the OBD limit part, collecting an indication provided by the OBD system, and comparing the data related to the exhaust gas and the indication provided by the OBD system. The method of testing to evaluate the OBD system utilizes a system that includes an exhaust gas source, a first and a second fluid path, the OBD limit part, and the OBD system.

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Номер записи: 82
30-01-2020 дата публикации

CATALYST DIAGNOSIS DEVICE

Номер: US20200032730A1
Автор: Ito Atsushi
Принадлежит:

The present invention provides a catalyst diagnosis device that enables precisely grasping a variation of AFR and diagnosing a deteriorated condition of the catalyst based on the variation. A timer counts elapsed time Tosc until downstream AFU (AFRd) meets a predetermined threshold condition when the fuel injection quantity is corrected by increasing or decreasing it so that as to the AFRu, the transition from either of leanness or richness to the other is repeated with the stoichiometric area between the leanness and the richness. An OSA calculating section calculates an Oxygen Storage Amount (OSA) as a function of the ΔAFR, Mfuel, Ne and Tosa. An OPA calculating section calculates an Oxygen Purge Amount (OPA) as a function of the ΔAFR, Mfuel, Ne and Topa. A deterioration diagnosing section diagnoses a deteriorated condition of the catalyst C on the basis of at least one of the OSA and OPA. 1. A catalyst diagnosis device which is provided with each Air/fuel ratio (AFR) sensor on an upstream side and on a downstream side of a catalyst provided in an exhaust passage of an engine and which determines deterioration of the catalyst on the basis of output of each AFR sensor , the catalyst diagnosis device comprising:a fuel injection quantity controller which controls a fuel injection quantity in order to turn AFR detected on the upstream side of the catalyst from either of leanness or richness to the other across reference AFR set in a stoichiometric area between the leanness and the richness;a timer which counts elapsed time since the AFR on the upstream side is turned from the either to the other until AFR detected by the AFR sensor on the downstream side meets a predetermined threshold condition;an Oxygen Storage Amount (OSA) calculating section which calculates oxygen storage capacity (OSC) of the catalyst on the basis of the elapsed time; anda deterioration diagnosing section which diagnoses a deterioration of the catalyst on the basis of the oxygen storage capacity ...

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Номер записи: 83
04-02-2021 дата публикации

Method and system for use when correcting supply of an additive to an exhaust gas stream

Номер: US20210033011A1
Автор: Mikael Lundström, Ola Stenlåås
Принадлежит: SCANIA CV AB

The present invention relates to a method for correcting a supply of additive to an exhaust gas stream resulting from combustion in an internal combustion engine. A first aftertreatment component being arranged for oxidation of nitric oxide into nitrogen dioxide, and a reduction catalytic converter being arranged downstream said first aftertreatment component. Additive is supplied to said exhaust gas stream for reduction of nitrogen oxides in said reduction catalytic converter, the additive being supplied in proportion to an occurrence of nitrogen oxides in said exhaust gas stream, said proportion being subject to correction. The method includes: supplying unburned fuel to said exhaust gas stream upstream said first aftertreatment component to reduce oxidation of nitric oxide into nitrogen dioxide in said first aftertreatment component, and correcting said supply of additive to said exhaust gas stream when supplying unburned fuel to said exhaust gas stream.

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Номер записи: 84
04-02-2021 дата публикации

METHOD AND SYSTEM FOR DIAGNOSING AN AFTERTREATMENT COMPONENT SUBJECTED TO AN EXHAUST GAS STREAM

Номер: US20210033012A1
Автор: LUNDSTRÖM Mikael, STENLÅÅS Ola
Принадлежит: SCANIA CV AB

A method for diagnosing an aftertreatment component, wherein nitrogen oxide is reduced using a first catalytic converter upstream said aftertreatment component and a second catalytic converter downstream said aftertreatment component, said aftertreatment component oxidizing nitric oxide into nitrogen dioxide. A first sensor measure nitrogen oxide downstream said first catalytic converter but upstream said aftertreatment component, and a second sensor measure nitrogen oxide downstream said aftertreatment component. The method includes: supplying additive upstream said first catalytic converter; using said first and second sensors, performing a first measurement at a first temperature of said first aftertreatment component; using said first and second sensors, performing a second measurement at a second temperature of said first aftertreatment component; and diagnosing oxidation of nitric oxide into nitrogen dioxide in said aftertreatment component using said first and second measurements. 1. A method for diagnosing a first aftertreatment component subjected to an exhaust gas stream resulting from combustion in an internal combustion engine , wherein nitrogen oxide in said exhaust gas stream is reduced through the use of a first catalytic converter upstream said first aftertreatment component and a second catalytic converter downstream said first aftertreatment component , said first aftertreatment component being arranged for oxidation of nitric oxide into nitrogen dioxide , wherein a first sensor is arranged to measure an occurrence of nitrogen oxide downstream said first catalytic converter but upstream said first aftertreatment component , and wherein a second sensor is arranged to measure an occurrence of nitrogen oxide downstream said first aftertreatment component , said method comprising:supplying additive upstream said first catalytic converter to reduce nitrogen oxide through the use of said first catalytic converter;using said first and second sensors, ...

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Номер записи: 85
04-02-2021 дата публикации

METHODS FOR MAKING AND USING SCR CATALYST ON-BOARD DIAGNOSTIC LIMIT PARTS

Номер: US20210033015A1
Автор: Ramesh Varun, STARK Isaac
Принадлежит:

A method of manufacturing an on-board diagnostic (OBD) limit part and a method of testing to evaluate an OBD system. The method of manufacturing the OBD limit part includes introducing a contaminant to an selective catalytic reduction (SCR) catalyst and contacting the contaminant with the SCR catalyst for a selected period of time. The method of manufacturing utilizes a vessel, the contaminant, and the SCR catalyst. The OBD limit part is a combination of the contaminant and the SCR catalyst within the vessel. The method of testing to evaluate the OBD system includes collecting data related to an exhaust gas before and after the exhaust gas is exposed to the OBD limit part, collecting an indication provided by the OBD system, and comparing the data related to the exhaust gas and the indication provided by the OBD system. The method of testing to evaluate the OBD system utilizes a system that includes an exhaust gas source, a first and a second fluid path, the OBD limit part, and the OBD system. 1. A method for evaluating an ability of a selective catalytic reduction (SCR) system to convert NOx to nitrogen and water , the method comprising:introducing a controlled amount of exhaust gas recirculation system coolant into a vessel containing a SCR catalyst;contacting the SCR catalyst contained in the vessel with the exhaust gas recirculation system coolant for a period of time;introducing an exhaust gas from a diesel engine into the vessel containing the SCR catalyst and the exhaust gas recirculation system coolant;collecting first data related to NOx in the exhaust gas prior to introducing the exhaust gas into the vessel containing the SCR catalyst and the exhaust gas recirculation system coolant;collecting second data related to NOx in the exhaust gas after the exhaust gas has passed through the vessel containing the SCR catalyst and the exhaust gas recirculation system coolant;comparing the second data to a threshold standard; andevaluating operation of the SCR system ...

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Номер записи: 86
04-02-2021 дата публикации

A SYSTEM AND A METHOD FOR DIAGNOSING THE PERFORMANCE OF TWO NOX SENSORS IN AN EXHAUST GAS PROCESSING CONFIGURATION COMPRISING TWO SCR UNITS

Номер: US20210033041A1
Автор: SOMMANSSON Joakim, STRÅÅT Fredrik
Принадлежит: SCANIA CV AB

The invention relates to a method, system, and computer program product for diagnosing an exhaust gas processing configuration for a combustion engine of a vehicle, said configuration comprising two SCR-units, two NOx-sensors and two reducing agent dosing units suitably arranged, comprising the steps of: performing a series of reducing agent dosing operations by a first reducing agent dosing unit; comparing measured NOx-contents measured by a first NOx-sensor and a second NOx-sensor related to said operations; and if the respective NOx-content measured by the respective NOx-sensors during the performed reducing agent dosing operations are substantially equal, determining that the respective NOx-sensors provide a proper performance. 1. A method for diagnosing an exhaust gas processing configuration for a combustion engine of a vehicle , said configuration comprising a first SCR-unit and a first NO-sensor arranged downstream said first SCR-unit and a second SCR-unit and a second NO-sensor arranged downstream said second SCR-unit and a first reducing agent dosing unit arranged upstream said first SCR-unit and a second reducing agent dosing unit arranged between said first SCR-unit and said second SCR-unit , said method comprising:determining whether a predetermined status of said exhaust gas processing configuration is at hand, and if so;performing a series of reducing agent dosing operations by said first reducing agent dosing unit;{'sub': x', 'x', 'x, 'determining an amount of NO-content measured by means of said first NO-sensor and said second NO-sensor for a number of said reducing agent dosing operations;'}{'sub': x', 'x', 'x, 'comparing said NO-content measured by said first NO-sensor and said second NO-sensor; and'}{'sub': x', 'x', 'x, 'if the respective NO-content measured by the respective NO-sensors during the performed reducing agent dosing operations are substantially equal, determining that the respective NO-sensors provide a proper performance.'}2. The ...

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Номер записи: 87
11-02-2016 дата публикации

DIAGNOSING SYSTEM FOR REDUCTANT DOSING SYSTEM

Номер: US20160040581A1
Автор: Chauhan Abhijeet Singh, Huang Wei, Larson Bryce R., Ratan Santosh Kumar
Принадлежит: Cummins Emission Solutions, Inc.

An SCR system may include a controller configured to diagnose errors with a dosing system. The controller may control a pump to compensate for a loss in pressure when dosing reductant and may maintain the pressure as close to a target pressure by modifying a parameter affecting the operation of the pump. The modification of the parameter may be used to determine an estimated flow feedback. The controller may use the estimated flow feedback data and commanded dosing amount data to calculate a percentage error in response to and using an integrated commanded flow and an integrated estimated flow feedback to detect errors of the dosing system. The errors may include an injector stuck closed error, a blocked pressure line error, a partial blockage of a pressure line or injector error, an injector stuck open error, a disconnected pressure line error, a leakage of a pressure line or injector error. 1. A method for diagnosing a reductant dosing system comprising:accessing commanded dosing flow amount data;accessing estimated flow feedback data;determining, using a controller, an integrated commanded flow amount based on the commanded dosing flow amount data and an integrated estimated flow feedback based on the estimated flow feedback;determining, using the controller, a percentage error value in response to and using the integrated commanded flow amount and the integrated estimated flow feedback;determining, using the controller, an error based on the determined percentage error value and one or more predetermined error threshold values; andindicating the determined error.2. The method of claim 1 , wherein the estimated flow feedback data is based on a parameter affecting operation of a pump of the dosing system.3. The method of claim 2 , wherein the parameter is a speed or strokes of the pump.4. The method of claim 2 , wherein the parameter affecting operation of the pump is modified to maintain a target pressure in a pressure line to a dosing module.5. The method of ...

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Номер записи: 88
09-02-2017 дата публикации

Exhaust System for a Motor Vehicle

Номер: US20170037753A1
Автор: Michael Nienhoff, Paul Rodatz, Thomas Schön, Tino Arlt
Принадлежит: Continental Automotive GmbH

The present disclosure relates to engines for a motor vehicle and some embodiments include a method for operating an exhaust train of a motor vehicle engine including: measuring a particle concentration downstream of a particle filter at a first operating point; determining the filter efficiency at the first operating point; changing operation of the engine to a second operating point to increase the particle emissions; measuring the particle concentration downstream of the filter at the second operating point; determining the filter efficiency at the second operating point; determining a difference between the efficiency levels; detecting an offset error, if the difference exceeds a defined threshold; and identifying a particle sensor as defective if an offset error is detected, rather than identifying the particle filter as defective.

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Номер записи: 89
08-02-2018 дата публикации

EXHAUST GAS PURIFICATION DEVICE

Номер: US20180038259A1
Автор: NAKATA Shingo
Принадлежит:

An exhaust gas purification device includes: an actual pressure difference obtainer that acquires an actual pressure difference which is an actual measurement value of a pressure difference of a filter; a flow rate obtainer that acquires a flow rate of exhaust gas flowing into the filter; a calculation pressure difference calculator that calculates a calculation pressure difference which is a calculated value of the pressure difference of the filter in a normal state when the exhaust gas flows into the filter with the flow rate acquired by the flow rate obtainer; and an abnormality determiner that performs an abnormality determination of the filter based on a pressure difference variation ratio which is a ratio between a variation in the actual pressure difference and a variation in the calculation pressure difference in response to a variation in the flow rate of the exhaust gas. 1. An exhaust gas purification device that purifies an exhaust gas exhausted from an internal-combustion engine and flowing through an exhaust piping the exhaust gas purification device comprising:a filter disposed in the exhaust piping to collect a particulate matter from the exhaust gas passing through the filter;an actual pressure difference obtainer that acquires an actual pressure difference which is an actual measurement value of a pressure difference between an upstream side and a downstream side of the filter;a flow rate obtainer that acquires a flow rate of the exhaust gas flowing into the filter;a calculation pressure difference calculator that calculates a calculation pressure difference which is a calculated value of the pressure difference between the upstream side and the downstream side of the filter in a normal state when the exhaust gas flows into the filter with the flow rate acquired by the flow rate obtainer; andan abnormality determiner that performs an abnormality determination of the filter, whereinthe abnormality determiner performs the abnormality determination of ...

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Номер записи: 90
08-02-2018 дата публикации

METHOD FOR CONTROLLING AN EXHAUST GAS TREATMENT SYSTEM

Номер: US20180038298A1
Автор: Ardanese Michelangelo, Dean Charles E., Miller Jon C., Smith Michael A.
Принадлежит:

A method for controlling an exhaust gas treatment system is provided. The exhaust gas treatment system includes an exhaust gas stream supplied by an exhaust gas source to a selective catalytic reduction device and a particulate filter device. Additionally or alternatively, the exhaust gas treatment system includes an exhaust gas stream supplied by an exhaust gas source to a selective catalytic reduction filter device. The method comprises initiating a selective catalytic reduction device service in response to a reductant dosing adaptation. The method can further include satisfying a secondary condition prior to initiating a selective catalytic reduction device service. The device service can include increasing the exhaust gas temperature or initiating an active regeneration of the particulate filter device. 1. A method for controlling an exhaust gas treatment system including an exhaust gas stream supplied by an exhaust gas source to a selective catalytic reduction device and a particulate filter device , the method comprising: initiating a selective catalytic reduction device service in response to a reductant dosing adaptation.2. The method of claim 1 , wherein the selective catalytic reduction device comprises a selective catalytic reduction filter device.3. The method of claim 1 , wherein the selective catalytic reduction device service comprises an active regeneration of the particulate filter device.4. The method of claim 3 , wherein active regeneration comprises increasing the exhaust gas temperature.5. The method of claim 3 , wherein active regeneration comprises one or more of normally operating the exhaust gas source claim 3 , utilizing an electrically heated catalyst claim 3 , and utilizing an oxidizing catalyst device.6. The method of claim 1 , wherein the adaptation comprises an increased reductant dosing rate relative to a baseline reductant dosing rate.7. The method of claim 6 , wherein the baseline reductant dosing rate is determined based on an ...

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Номер записи: 91
07-02-2019 дата публикации

Catalyst abnormality diagnostic device and catalyst abnormality diagnostic method

Номер: US20190040784A1
Автор: Takashi Sakai
Принадлежит: Subaru Corp

A catalyst abnormality diagnostic device is configured to diagnose an abnormality of a first purification catalyst having an oxygen storage capacity and a second purification catalyst having the oxygen storage capacity and a function of a particulate filter provided on an exhaust passage on a downstream side of the first purification catalyst. The catalyst abnormality diagnostic device adjusts a fuel injection amount so that an air-fuel ratio of an exhaust gas is repeatedly in a rich state and a lean state, obtains a first determination value indicating a catalytic performance of the first purification catalyst, obtains a second determination value indicating a catalytic performance of the second purification catalyst, and determines whether there is an abnormality in one or both of the first purification catalyst and the second purification catalyst on the basis of the first determination value, the second determination value, and a predetermined determination reference value.

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Номер записи: 92
06-02-2020 дата публикации

EXHAUST GAS SYSTEM

Номер: US20200040783A1
Автор: BRÜCK Rolf
Принадлежит: Vitesco Technologies GmbH

An exhaust system for the aftertreatment of exhaust gases of an internal combustion engine, having, in series as viewed in a flow direction of the exhaust gas, a catalyst for the oxidation of the exhaust gas and/or a catalyst for storing nitrogen oxides, having an introduction point for the feed of a reducing agent, having an SCR catalyst for the selective catalytic reduction of nitrogen oxides, and having a particle filter, wherein the particle filter is arranged downstream of the SCR catalyst in the flow direction, and a second SCR catalyst and/or an ammonia slippage catalyst is arranged downstream of the particle filter in the flow direction. 1. An exhaust system for the aftertreatment of exhaust gases of an internal combustion engine , comprising:a catalyst for the oxidation of the exhaust gas and/or a catalyst for storing nitrogen oxides, having an introduction point for the feed of a reducing agent;a first SCR catalyst for the selective catalytic reduction of nitrogen oxides, the SCR catalyst arranged downstream of the catalyst in a flow direction of the exhaust gas;a particle filter arranged downstream of the SCR catalyst in the flow direction; anda second catalyst arranged downstream of the particle filter in the flow direction.2. The exhaust system of claim 1 , wherein the first SCR catalyst claim 1 , which is arranged upstream of the particle filter in the flow direction claim 1 , is electrically heatable.3. The exhaust system of claim 1 , wherein the first SCR catalyst in the flow direction has an extent of at most 80 mm along the flow direction claim 1 , the first SCR catalyst preferably has an extent of less than 50 mm claim 1 , and the first SCR catalyst particularly preferably has an extent of less than 40 mm.4. The exhaust system of claim 1 , wherein the first SCR catalyst in the flow direction is arranged with a spacing to the particle filter along the flow direction of at most 20 mm.5. The exhaust system of claim 1 , wherein the first SCR catalyst ...

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Номер записи: 93
16-02-2017 дата публикации

EXHAUST GAS PURIFICATION SYSTEM

Номер: US20170043295A1
Автор: HARA Shinji, Minezawa Masanobu, SAKUMOTO Kouji
Принадлежит:

The exhaust gas purification system includes a SCR, an NOx sensor which is provided on a downstream side of the SCR, and an NOx purifying controller which controls an amount of urea water being ejected to the SCR and performs an abnormality diagnosis based on a detection value of the NOx sensor, wherein the exhaust gas purification system includes an exhaust gas temperature sensor which acquires temperature of the exhaust gas flowing into the SCR, a temperature increasing rate calculating unit which calculates a temperature increasing rate at which the exhaust gas temperature acquired by the exhaust gas temperature sensor reaches a second temperature from a predetermined first temperature, and a prohibiting unit which prohibits abnormality diagnosis by the NOx purifying controller in a case in which the temperature increasing rate calculated by the temperature increasing rate calculating unit is higher than a predetermined determination threshold value. 1. An exhaust gas purification system comprising:a selective catalytic reduction which is provided on an exhaust gas passage of an internal combustion engine and purifies NOx in exhaust gas by using ammonia generated from urea water as a reducing agent;an NOx sensor which is provided on the exhaust gas passage on downstream side further than the selective catalytic reduction;control means for controlling an amount of urea water being ejected to the selective catalytic reduction and performing an abnormality diagnosis based on a detection value of the NOx sensor,exhaust gas temperature acquiring means for acquiring temperature of the exhaust gas flowing into the selective catalytic reduction;temperature increasing rate calculating means for calculating a temperature increasing rate at which an exhaust gas temperature acquired by the exhaust gas temperature acquiring means reaches a predetermined second temperature, which is higher than a predetermined first temperature, from the first temperature; andprohibiting means ...

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Номер записи: 94
19-02-2015 дата публикации

Device and method for cleaning of an scr system

Номер: US20150047325A1
Автор: Anders Simon, Mikael Lundström
Принадлежит: SCANIA CV AB

A method for cleaning an SCR system, wherein reducing agent is supplied to an exhaust flow upstream of an SCR catalyst ( 260 ), NO x contents of the exhaust flow are determined upstream and downstream of the SCR catalyst ( 260 ) and reducing agent crystals are removed by a high-temperature procedure. The steps are determining (s 430 ) a ratio (K 1 ) between NO x contents downstream and upstream of the SCR catalyst ( 260 ), raising the temperature (s 440 ) of the exhaust flow to vaporise reducing agent crystals with a view to cleaning, determining (s 450 ) a ratio (Kn) between respective NO x contents determined downstream and upstream of the SCR catalyst ( 260 ) at a temperature (T 2 ) of the SCR catalyst ( 260 ) at which reducing agent crystals vaporise, comparing (s 460 ) the ratios (K 1, Kn) and using this comparison as a basis for deciding whether reducing agent crystals have been removed to an intended extent. Also a computer program product containing program code (P) for a computer ( 200; 210 ) for implementing the method according to the invention. The invention relates also to a device and a motor vehicle equipped with the device.

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Номер записи: 95
16-02-2017 дата публикации

VIRTUAL REDUCTANT LEVEL SENSOR

Номер: US20170044949A1
Автор: KHALED Nassim, Larson Bryce R., Sharma Tushar H., Sonawane Sarang S.
Принадлежит: Cummins Emission Solutions Inc.

An aftertreatment system comprises a reductant storage tank and a SCR system fluidly coupled thereto. A reductant physical level sensor and a tank temperature sensor are operatively coupled to the reductant storage tank. A controller is communicatively coupled with each of the sensors and configured to: interpret a first level output value from the physical level sensor and a first temperature output value from the tank temperature sensor. If the first level output value is below a first threshold, the controller determines if the first temperature output value is below a second threshold. If the first level output value is below the first threshold and the first temperature output value is below the second threshold, the controller determines a virtual reductant level in the reductant storage tank and indicates the virtual reductant level in lieu of a physical reductant level in the reductant storage tank to a user. 1. An aftertreatment system , comprising:a reductant storage tank;a selective catalytic reduction system fluidly coupled to the reductant storage tank, the selective catalytic reduction system including at least one catalyst;a reductant physical level sensor operatively coupled to the reductant storage tank;a tank temperature sensor operatively coupled with the reductant storage tank; and interpret a first level output value from the physical level sensor, the first level output value indicative of a physical level of a liquid portion of a reductant in the reductant storage tank,', 'interpret a first temperature output value from the tank temperature sensor, the first temperature output value indicative of a temperature of the reductant in the reductant storage tank,', 'if the first level output value is below a first threshold, determine if the first temperature output value is below a second threshold,', 'if it is determined that the first level output value is below the first threshold and the first temperature output value is below the second ...

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Номер записи: 96
16-02-2017 дата публикации

METHOD OF PROTECTING A DIESEL PARTICULATE FILTER FROM OVERHEATING

Номер: US20170044960A1
Автор: Brittle Peter George, Mitchell Matthew, Naidu Paspuleti Ashish Kumar, Wright James
Принадлежит: FORD GLOBAL TECHNOLOGIES, LLC

A method for preventing overheating of a diesel particulate filter during regeneration when an engine is idling may include using an electric machine to apply a load to the engine and compensating for the increase in applied load by increasing an engine torque set point to reduce the concentration of Oxygen in the exhaust gas flowing to the diesel particulate filter. Increased engine torque may be provided by adjusting air-fuel ratio by enriching an air-fuel mixture supplied to the engine and the diesel particulate filter. The control may be initiated in response to entering an idle mode during regeneration or in response to a measured or estimated temperature of the diesel particular filter exceeding a threshold or limit. Estimated temperature may be predicted using a soot combustion model. 1. A method of controlling a vehicle having an electric machine and a diesel particulate filter (DPF) coupled to an engine , comprising:in response to a DPF temperature exceeding a threshold during regeneration of the DPF while the engine is in idle mode, operating, by a controller, the electric machine in a generator mode to increase engine load and adjusting fueling to the engine to compensate for the engine load increase.2. The method of wherein adjusting the fueling to the engine comprises reducing an air-fuel ratio to increase richness of an air-fuel mixture supplied to the DPF.3. The method of further comprising checking engine speed to confirm that the engine is operating in the idle mode.4. The method of further comprising using a soot combustion model to predict the DPF temperature within the DPF.5. The method of further comprising measuring the DPF temperature using a temperature sensor to measure one of a temperature within the DPF and a temperature of exhaust gas exiting the DPF.6. The method of wherein the electric machine comprises an integrated starter-generator.7. A vehicle comprising:a diesel engine;an electric machine connected to the engine;a battery connected ...

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Номер записи: 97
16-02-2017 дата публикации

METHOD OF CONTROLLING A PARTICULATE FILTER

Номер: US20170044961A1
Автор: MAZZARA BOLOGNA Giuseppe, PELLEGRINO Stefano, Ricci Isadora
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A method of controlling a particulate filter of an internal combustion engine is disclosed. A regeneration cycle of the particulate filter is initiated. During the regeneration, a value of an exhaust gas temperature at an outlet of the particulate filter is determined and a value of a residual soot quantity stored into the particulate filter is estimated on the basis of the measured value of the exhaust gas temperature at the outlet of the particulate filter. The regeneration cycle may be started and stopped based on the estimated residual soot quantity. 112-. (canceled)13. A method of controlling a particulate filter of an internal combustion engine comprising:performing a regeneration of the particulate filter;determining a value of an exhaust gas temperature at an outlet of the particulate filter during the regeneration; andestimating a value of a residual soot quantity stored into the particulate filter on the basis of the measured value of the exhaust gas temperature at the outlet of the particulate filter.14. The method according to claim 13 , wherein estimation of the value of the residual soot quantity comprises:determining a value of the exhaust gas mass flow rate at the inlet of the particulate filter and a value of the exhaust gas temperature at the inlet of the particulate filter during the regeneration;estimating a value of a temperature inside the particulate filter on the basis of the determined value of the exhaust gas mass flow rate at the inlet of the particulate filter, the determined value of the exhaust gas temperature at the inlet of the particulate filter, and the determined value of the exhaust gas temperature at the outlet of the particulate filter; anddetermining the value of the residual soot quantity on the basis of the estimated value of the temperature inside the particulate filter.15. The method according to claim 14 , wherein determination of the value of the residual soot quantity comprises using the estimated value of the ...

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Номер записи: 98
16-02-2017 дата публикации

DETERMINING THE CONVERSION EFFICIENCY OF AN EXHAUST GAS CATALYTIC CONVERTER

Номер: US20170044962A1
Автор: Baumann Thomas, Hohner Peter, Keller Frank, Tzivanakis Stefanos
Принадлежит:

In order to determine the conversion efficiency of at least one component of a catalytic converter box comprising at least one SCR catalytic converter and an oxides of nitrogen storage catalytic converter for the aftertreatment of the exhaust gases of an internal combustion engine, wherein the catalytic converter box is associated at the downstream end with a NOsensor, at least for a limited period of time the internal combustion engine is operated such that a first of the two components does not affect the signal detected by means of the NOsensor and the conversion efficiency of the second component is determined depending on the signal of the NOsensor that is not affected by the first component. 1678196199. A method for determining conversion efficiency of at least one component of a catalytic converter box () comprising first and second components , wherein the first component is at least one SCR catalytic converter () and the second component is an oxides of nitrogen storage catalytic converter () , for aftertreatment of exhaust gases of an internal combustion engine () , wherein a NOsensor () is disposed downstream of the catalytic converter box () , characterized in that at least for a limited period of time the internal combustion engine () is operated such that one of the first and second components does not affect a signal detected by means of the NOsensor () and the conversion efficiency of an other of the first and second components is determined depending on a signal of the NOsensor () that is unaffected by the one of the first and second components.2178. The method according to claim 1 , characterized in that for a limited period of time the internal combustion engine () is operated such that a reduction of the NHstored in the SCR catalytic converter () occurs and if no or almost no more NHis stored claim 1 , the conversion efficiency of the oxides of nitrogen storage catalytic converter () is determined depending on the signal of the NOsensor.317. The ...

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Номер записи: 99
16-02-2017 дата публикации

METHOD FOR DETECTING THE AGING OF A HETEROGENEOUS CATALYTIC CONVERTER, EXHAUST AFTER-TREATMENT SYSTEM FOR AN INTERNAL COMBUSTION ENGINE, AND INTERNAL COMBUSTION ENGINE

Номер: US20170044963A1
Автор: RUSCH Klaus, Wehler Klaus
Принадлежит:

A method for detecting the aging of a heterogeneous catalytic converter, including the following steps: acquiring at least one measurement signal in a media flow passing through the catalytic converter downstream of the catalytic converter; applying a time-variant input signal to the media flow and/or the catalytic converter; evaluating a behavior of the at least one measurement signal as a function of the time-variant input signal; and detecting a state of aging of the catalytic converter. 115-. (canceled)16. A method for detecting aging of a heterogeneous catalytic converter , comprising the steps of:detecting at least one measurement signal in a media flow passing through the catalytic converter, downstream of the catalytic converter;applying a time-variant input signal to the media flow and/or the catalytic converter;evaluating a behavior of the at least one measurement signal as a function of the time-variant input signal; anddetermining a state of aging of the catalytic converter.17. The method according to claim 16 , including using a change in amplitude and/or a change in phase angle of the at least one measurement signal for detecting aging.18. The method according to claim 16 , including changing the time-variant input signal and using a response by the at least one measurement signal to the change in the input signal for detecting aging.19. The method according to claim 18 , including changing the time-variant input signal under conditions which are otherwise kept constant for the catalytic converter.20. The method according to claim 16 , including using a dependence of the at least one measurement signal on at least one condition for the catalytic converter for detecting aging.21. The method according to claim 16 , including detecting two different measurement signals downstream of the catalytic converter and evaluating behavior of the two measurement signals as a function of the time-variant input signal.22. The method according to claim 16 , including ...

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Номер записи: 100