СПОСОБ (ВАРИАНТЫ) ОБНАРУЖЕНИЯ ТВЕРДЫХ ЧАСТИЦ В ОТРАБОТАВШИХ ГАЗАХ

Изобретение может быть использовано в датчиках резистивного типа для обнаружения твердых частиц в потоке отработавших газов. Способ обнаружения твердых частиц в потоке отработавших газов заключается в том, что регулируют работу двигателя в соответствии с распределением твердых частиц на множестве пар электродов, расположенных внутри общего корпуса датчика твердых частиц. Различают размер распределения твердых частиц на основе сопротивления, измеренного независимо на каждой отдельной паре электродов из множества пар электродов, и дополнительно генерируют распределение тока на множестве пар электродов на основе сопротивления на каждой отдельной паре электродов из множества пар электродов. Раскрыт вариант способа обнаружения твердых частиц в потоке отработавших газов. Технический результат заключается в повышении точности обнаружения твердых частиц. 2 н. и 10 з.п. ф-лы, 8 ил.

СПОСОБ И СИСТЕМА ДЛЯ ОБНАРУЖЕНИЯ УТЕЧКИ ИЗ САЖЕВОГО ФИЛЬТРА

Изобретение может быть использовано в системах очистки отработавших газов двигателей внутреннего сгорания. Способ для выпускной системы двигателя. При выбранных условиях согласуют выходной сигнал верхнего по потоку датчика содержания кислорода в отработавших газах и нижнего по потоку датчика содержания кислорода в отработавших газах с падением давления на сажевом фильтре. Сажевый фильтр установлен в выпускной системе. При выбранных условиях концентрация кислорода в отработавших газах на сажевом фильтре по существу постоянна. Выбранные условия: нагрузка на сажевый фильтр меньше порогового значения, расход отработавших газов выше порогового значения и двигатель работает в установившемся режиме. Выходной сигнал представляет собой выходное напряжение. Процесс согласования предусматривает следующие этапы. Усреднение выходного напряжения верхнего по потоку и нижнего по потоку датчиков по заданному интервалу. Корректировку усредненного выходного напряжения верхнего по потоку датчика в зависимости ...

СПОСОБ (ВАРИАНТЫ) И СИСТЕМА ДЛЯ РЕГЕНЕРАЦИИ БЕНЗИНОВОГО САЖЕВОГО ФИЛЬТРА

Изобретение может быть использовано в двигателях внутреннего сгорания. Способ для двигателя содержит следующие этапы. Направление потока отработавших газов из первого цилиндра (248A) через первый сажевый фильтр (264A) в первом отводном канале (262A). Направление потока отработавших газов из второго цилиндра (248B) через второй сажевый фильтр (264B) во втором отводном канале (262B). Регулировка работы двигателя (200) в ответ на ухудшение состояния сажевого фильтра. Определение ухудшения состояния первого и второго сажевых фильтров, исходя из синхронности пульсаций давления отработавших газов относительно событий сгорания. Раскрыты способ для двигателя и двигатель. Технический результат заключается в повышении топливной экономичности и степени очистки отработавших газов от твердых частиц благодаря установке отдельных сажевых фильтров внутри отводных каналов системы выпуска отработавших газов. 3 н. и 17 з.п. ф-лы, 8 ил.

СПОСОБ (ВАРИАНТЫ) И СИСТЕМА ДЛЯ ОБНАРУЖЕНИЯ ТВЕРДЫХ ЧАСТИЦ В ОТРАБОТАВШИХ ГАЗАХ

Изобретение относится к конструкции и использованию датчиков твердых частиц в отработавших газах. Целью изобретения является идентификация и отфильтровывание твердых частиц отработавших газов перед выпуском отработавших газов в атмосферу. Предложены способы и системы для обнаружения твердых частиц датчиком твердых частиц, расположенным ниже по потоку от сажевого фильтра дизельного двигателя в выпускной системе. Согласно одному из примеров способ может включать в себя накопление поступающих твердых частиц путем приложения большего электрического смещения к первому уловителю датчика твердых частиц с последующим заряжением твердых частиц и образованием высокозаряженных дендритов. Способ дополнительно включает в себя улавливание указанных дендритов, покидающих первый уловитель, путем приложения меньшего электрического смещения ко второму уловителю, также расположенному внутри того же датчика твердых частиц, что приводит к снижению влияния расхода отработавших газов на датчик твердых частиц ...

СИСТЕМА УПРАВЛЕНИЯ ВЫБРОСАМИ ВЫХЛОПНЫХ ГАЗОВ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к области очистки отработавших газов двигателя внутреннего сгорания. Система управления выбросами выхлопных газов двигателя внутреннего сгорания включает в себя фильтр, устройство повышения температуры, устройство определения дифференциального давления и электронный модуль управления. Фильтр включает в себя первую область в качестве части фильтра и вторую область в качестве другой части фильтра. Электронный модуль управления выполнен с возможностью вычислять первое осажденное количество таким образом, что вычисленное осажденное количество становится больше по мере того, как становится больше соотношение абсолютной величины первой величины уменьшения дифференциального давления к продолжительности первого периода окисления. Электронный модуль управления выполнен с возможностью вычислять количество вещества в виде твердых частиц, осажденного во второй области, на основе продолжительности второго периода окисления и второй величины уменьшения дифференциального давления ...

СПОСОБ И УСТРОЙСТВО ДЛЯ РАСПОЗНОВАНИЯ СГОРАНИЯ В ФИЛЬТРЕ ЧАСТИЦ

... 1. Способ распознавания сгорания в фильтре (6) частиц, встроенном в систему выпуска отработавших газов двигателя (1) внутреннего сгорания, периодическую регенерацию которого осуществляют соответствующими средствами, включающий этап измерения или оценки характерных параметров сгорания в упомянутом фильтре (6) и этап обработки этих параметров для диагностирования случая сгорания и оценки его интенсивности, отличающийся тем, что указанные этапы осуществляют в процессе всей фазы работы двигателя (1) и, в частности, в процессе фаз управляемых регенераций фильтра (6). ! 2. Способ по п.1, отличающийся тем, что упомянутые этапы, дополнительно осуществляют в процессе заданного времени, следующего за остановкой двигателя (1) внутреннего сгорания. ! 3. Способ по п.1 или 2, отличающийся тем, что упомянутыми характерными параметрами являются температура на входе фильтра (6) частиц и температура на выходе фильтра (6) частиц. ! 4. Способ по п.3, отличающийся тем, что вывод о сгорании частиц в фильтре ...

Способ для сажевого датчика и выпускная система двигателя

СПОСОБ (ВАРИАНТЫ) И СИСТЕМА ДЛЯ ПОВОРОТА УСТРОЙСТВА ДООЧИСТКИ ОТРАБОТАВШИХ ГАЗОВ

СИСТЕМА И СПОСОБ (ВАРИАНТЫ) ДЛЯ ОБНАРУЖЕНИЯ УТЕЧКИ САЖЕВОГО ФИЛЬТРА

PROCEDURE FOR NACHEINSPRITZUNG HYDROCARBONS SUITABLE BY FOR RECOVERY, ALCOHOLS AND/OR REDUCING AGENTS (E.G. DIESEL FUEL AND/OR UREA AND/OR AMMONIAKALI SOLUTION) TO THE REGENERATION OF EXHAUST FILTER SYSTEMS IN DIESEL ENGINES

DEVICE FOR THE EXHAUST SUBSEQUENT TREATMENT AND THEIR USE

PROCEDURE FOR ERROR RECOGNITION IN A PARTICLE FILTER

SYSTEM FOR THE SUPPORT OF THE RECOVERY OF DECONTAMINATION AGENTS FOR A MOTORCAR ENGINE

EXHAUST CONTROL DEVICE FOR A COMBUSTION ENGINE AND A TAX PROCEDURE FOR IT

METHOD AND PETROL ENGINE ARRANGEMENT WITH IMPROVED PARTICULATE FILTERING II

Die Erfindung betrifft ein Verfahren zum Betreiben einer Ottomotoranordnung in einer Betriebsphase, die eine Normalbetriebsphase und eine Schubbetriebsphase umfasst und eine Ottomotoranordnung, wobei die Ottomotoranordnung, wobei die Ottomotoranordnung einen Ottomotor (1), ein Steuergerät und eine Abgasnachbehandlungsanlage (2) mit mindestens einem Ottomotorpartikelfilter umfasst, wobei die Schubbetriebsphase durch mindestens eine unbefeuerte Schubbetriebsphase und/oder mindestens eine sauerstoffreduzierte Schubbetriebsphase gebildet wird, wobei das in der unbefeuerte Schubbetriebsphase den Ottomotorpartikelfilter (4) durchströmende Gas durch den Ottomotor (1) gepumpte oder extern zugeführte Luft ist, wobei in der sauerstoffreduzierten Schubbetriebsphase das den Ottomotorpartikelfilter (4) durchströmende Gas einen geringeren Sauerstoffgehalt als die Umgebungsluft aufweist, wobei in dem Ottomotorpartikelfilter (4) bei der unbefeuerten Schubbetriebsphase unter Vorhandensein von Partikeln ...

Verfahren und eine Vorrichtung zum Vorbeladen eines Partikelfilters einer Brennkraftmaschine sowie Partikelfilter

Die Erfindung betrifft ein Verfahren zum Vorbeladen eines Partikelfilters, insbesondere einer Brennkraftmaschine, bei welchem Partikel eines Vorbeladungsmaterials in einer Dispersion zusammen mit einem Fluid, insbesondere Luft, mittels einer Druckdifferenz zwischen Einlass und Auslass des Partikelfilters in den Partikelfilter eingebracht werden, wobei die Druckdifferenz in der Weise gewählt wird, dass sich ein Massenstrom des Fluids von größer als etwa 200 kg, bevorzugt größer als etwa 300 kg und am bevorzugtesten größer etwa 400 kg pro Stunde und pro Liter durchströmtem Filtervolumen des Partikelfilters einstellt.

PROCEDURE FOR THE EVALUATION OF THE EXHAUST CATCHING ACHIEVEMENT AND DEVICE FOR IT

MALFUNCTIONING DIAGNOSTIC DEVICE FOR EMISSION CONTROL DEVICE

Verfahren zur Funktionsüberprüfung einer Abgasnachbehandlungsanlage eines Ottomotors und eine Ottomotoranordnung

Die Erfindung betrifft ein Verfahren zur Funktionsüberprüfung einer Abgasnachbehandlungsanlage (6) eines Ottomotors (1) und eine Ottomotoranordnung (5), welche zu Durchführung des Verfahrens eingerichtet ist, wobei das Verfahren folgende Schritte umfasst: Aktivieren einer Diagnosebetriebsphase, wobei der Ottomotor (1) in der Diagnosebetriebsphase derart betrieben wird, dass er höhere Partikelemissionen, insbesondere eine höhere Partikelmasse, ausstößt als in seiner Normalbetriebsphase, Ermittlung der Partikelmasse nach dem Ottomotorpartikelfilter (2) mit einem Partikelsensor (3), Bestimmung der Filtrationseffizienz des Ottomotorpartikelfilters (2) anhand der während der Diagnosebetriebsphase bestimmten Partikelmasse, wobei die Abgasnachbehandlungsanlage (6), insbesondere der Ottomotorpartikelfilter (2), als funktionstüchtig definiert wird, wenn die bestimmte Filtrationseffizienz über einem vorab definierten Effizienz-Schwellenwert liegt oder dem Effizienz-Schwellenwert entspricht, wobei ...

DEVICE FOR THE DETERMINATION OF THE LOADING CONDITION OF PARTICLE FILTERS

EMISSION CONTROL DEVICE

EXHAUST FILTER COUNTER-PRESSURE INDICATOR

PROCEDURE FOR THE MONITORING OF THE OPERATING CONDITION OF A PARTICLE FILTER BASED ON THE COMPARISON BETWEEN AN ESTIMATED VALUE AND A CALIBRATED VALUE

FILTER CONTROL DEVICE

Function diagnostic system for filter of internal combustion engine

FUNCTION DIAGNOSTIC SYSTEM FOR FILTER OF INTERNAL COMBUSTION A function diagnostic system for a filter of an internal combustion engine is provided. The function diagnostic system includes a PM sensor (55) and an electronic control unit (10). The electronic control unit (10) is configured to: (i) calculate a NOx conversion rate in the filter; (ii) determine whether a NOx converting function of the filter is normal; (iii) execute a sensor regeneration process for removing the PM deposited between an electrodes of the PM sensor; (iv) continuously monitor an output value of the PM sensor after a predetermined PM deposition restart time, after execution of the sensor regeneration process is finished; and (v) determine that there is an abnormality in a PM trapping function of the filter, when the output vale of the PM sensor, which has been continuously monitored, is reduced when the electronic control unit determines that the NOx converting function of the filter is in a normal status. ---- ...

EXHAUST SYSTEM MONITOR

A method of monitoring exhaust gas flow through an exhaust system of an internal combustion engine comprising the steps of generating a flow efficiency value (K E), comparing the flow efficiency value to a reference efficiency value, and if the reference efficiency value is exceed by a predetermined amount, then setting a flow fault indicator flag. In one aspect of the invention, the flow efficiency value is generated as a ratio of the magnitude of the exhaust gas flow restriction, and the mass flux through the engine. The magnitude of the exhaust gas flow restriction is represented by the pressure drop across the exhaust system, and the mass flux through the engine is determined as a function of the mass airflow rate and exhaust gas density. The resulting flow efficiency value (K E) is a non- dimensional parameter that characterizes the level of restriction in the exhaust system independent of the engine operating conditions.

EXHAUST GAS PURIFICATION DEVICE

An exhaust gas purification device (101, 102, 103) having a DPF (33) provided in an exhaust system (30) of an internal combustion engine. The device has one or more sound pressure measurement means (8F, 8R) for measuring exhaust sound pressure and calculation means (10) for calculating the amount of PM accumulation based on the exhaust sound pressure measured. On the upstream side of the DPF (33) are arranged exhaust gas temperature measurement means (36) and exhaust gas temperature raising means (34). The exhaust gas temperature raising means (34) is activated when the amount of PM accumulation calculated by the calculation means (10) is higher than a preset default and at the same time when the exhaust gas temperature measured by the exhaust temperature measurement means (36) is lower than a lower limit of a temperature region in which the DPF (33) can be regenerated.

METHOD FOR MONITORING COMPONENTS IN AN EXHAUST AFTER TREATMENT SYSTEM, AN EXHAUST AFTER TREATMENT SYSTEM, AND A CONTROLLER FOR AN EXHAUST AFTER TREATMENT SYSTEM

Components in an exhaust after treatment system (EATS) for a diesel engine are monitored by measuring heat released (QDOC) across a diesel oxidation catalyst (DOC) and heat released (QEATS) across the DOC and a diesel particulate fi lter (DPF) during an A Hi injection event, by calculating heat input from AHI fuel (QAHI) during performance of the AH I injection event with a fully functioning AHI nozzle, and by measuring NOX conversion efficiency (nSCR) from NOX to N2 by a selective catalytic reduction system (SCR) at a condition where a SCR is sensitive to feeding gas compositions while AHI is not in use, Malfunctioning components are identified using these measurements and calculations.

EXHAUST GAS PURIFIER AND OPERATING METHOD THEREOF

An exhaust gas purifier, having three or more filter units in parallel, wherein if at least one filter unit fails during its regeneration, it is compensated by the cyclic operation of the remaining filter units so that the total function of the exhaust gas purifier is practically maintained. Electric heaters 14 are provided for regenerating individual filter units 3, and valves 4 are placed either at the entrances or at the exits of the units 3. While filter units 3 with opened valves 4 trap particulates, at least one filter unit 3's valve 4 is closed to send an electric current into the heater 14 for regenerating the filter unit 3. If the detected current is beyond a predetermined range, the current supply is shut off with the valve 4 still kept closed, and another filter unit 3 is regenerated in the same manner.

Condition sensor particulate accumulation for filter device of an internal combustion engine.

СПОСОБ КОНТРОЛЯ И ИЗГОТОВЛЕНИЯ УСТРОЙСТВА ДЛЯ ФИЛЬТРАЦИИ ЧАСТИЦ

Объектом изобретения является способ контроля надежности сажевого фильтра, предназначенного для использования в линии выхлопа дизельного двигателя, включающий в себя стадии, которые состоят в том, чтобы, предварительно определив предельную массу сажи для упомянутого фильтра, загрузить в новый фильтр сажу в количестве, равном по меньшей мере двум значениям и не более трех значений упомянутой предельной массы сажи, затем осуществить активную регенерацию упомянутого фильтра, а затем в любом порядке определить эффективность фильтрации упомянутого фильтра, измерить перепад давления в нем и сравнить его с перепадом давления в новом фильтре, измерить степень его растрескивания и проверить его целостность после механического нагружения. Объектом изобретения является также способ диагностики надежности фильтра.

System and method for estimating a mass of particulate matter accumulated in a particulate filter

Control device of internal combustion engine

EXHAUST SYSTEM WITH DIFFERENTIAL PRESSURE SENSOR

Nitrogen oxide trap desulfurizing method for post processing of exhaust gas emitted by internal engine of motor vehicle, involves desulfurizing trap after beginning and before ending of regeneration of filter

Procédé de désulfuration d'un NOx-Trap pour le post-traitement de gaz d'échappement émis par un moteur interne d'un véhicule automobile, comprenant une étape (E2) de régénération d'un filtre à particules, caractérisé en ce qu'il comprend une étape (E4) de désulfuration du NOx-Trap qui est initiée pendant la régénération du filtre à particules, après le commencement de la régénération du filtre à particules et avant la fin de cette régénération, de sorte que la désulfuration du NOx-Trap et la régénération du filtre à particules sont effectuées partiellement simultanément.

METHOD AND DEVICE FOR DIAGNOSING THE OPERATING STATE OF AN EXHAUST LINE OF AN INTERNAL COMBUSTION ENGINE

METHOD AND DEVICE FOR DIAGNOSING A PARTICLE FILTER

Soot combustion reactor in a particulate filter and a particulate filter for an exhaust line.

SYSTEM AND PROCESS OF DETECTION Of a FILLING BY FIREPROOF PARTICLES Of a FILTER HAVE PARTICLES OF MOTOR VEHICLE

PARTICULATE FILTER WITH A SELECTIVE CLOSURE DEVICE

Filtre (1) à particules comprenant un corps (3) définissant une enceinte (4) de filtration, cet enceinte (4) de filtration étant subdivisée en plusieurs secteurs (7) adjacents, séparés deux à deux par des cloisons (8) qui s'étendent d'une extrémité (5) amont à une extrémité (6) aval, ce filtre (1) comprenant un dispositif (9) d'obturation comprenant un obturateur (10) d'entrée disposé en regard de l'extrémité (5) amont, et un obturateur (11) de sortie disposé en regard de l'extrémité (6) aval, chaque obturateur (10, 11) étant muni d'un cache (14) et étant monté mobile par rapport au corps (3) de sorte à pouvoir adopter une pluralité de positions d'obturation dans chacune desquelles le cache (14) masque au moins l'un des secteurs (7).

SYSTEM FOR CHARACTERIZATION OF CONDUCTIVE NANOPARTICLES

METHOD FOR DETECTING FAILURE OF A PARTICULATE FILTER OF AN INTERNAL COMBUSTION ENGINE AND PROTECTION

CONTROL METHOD OF A PARTICULATE FILTER OF A MOTOR VEHICLE AS A FUNCTION OF ITS DAMAGE

Method for determining duration of regeneration of particle filter utilized for retaining soot particles from diesel engine, involves comparing mass of soot with sum of n species masses based on typology established by reactivity criterion

Procédé de détermination de la durée de la régénération d'un filtre à particules utilisant un modèle utilisé par un calculateur qui déclenche l'arrêt de la régénération, une fois que la masse des suies retenue dans le filtre est inferieure à un seuil prédéterminé, caractérisé en ce que la masse des suies considérée est assimilée à la somme de n masses-espèces , selon une typologie établie par un critère de réactivité.

Exhaust line controlling method for engine of e.g. motor vehicle, involves measuring temperature in upstream of particle filter on exhaust line in exhaust flow direction, and monitoring operation of regeneration system from measurement

L'invention concerne un procédé de contrôle d'une ligne d'échappement d'un moteur. La ligne d'échappement comprend un filtre à particules et un système de régénération du filtre à particules. Le procédé comprend une mesure de température effectuée en amont du filtre à particules sur la ligne d'échappement dans le sens d'écoulement de l'échappement et un contrôle du fonctionnement du système de régénération du filtre à particules à partir de la mesure effectuée.

Nitrogen oxide trap desulphurizing method for post processing of exhaust gas emitted by diesel engine of motor vehicle, involves desulphurizing trap after beginning and before ending of regeneration of filter

Procédé de désulfuration d'un NOx-Trap pour le post-traitement de gaz d'échappement émis par un moteur interne d'un véhicule automobile, caractérisé en ce qu'il comprend une étape (E2) d'estimation de l'efficacité d'une réalisation combinée de la désulfuration du NOx-Trap pendant la régénération d'un filtre à particules, puis une étape (E5) de désulfuration du NOx-Trap qui est initiée pendant la régénération (E3) du filtre à particules, après le commencement de la régénération du filtre à particules et avant la fin de cette régénération, de sorte que la désulfuration du NOx-Trap et la régénération du filtre à particules sont effectuées partiellement simultanément, si l'estimation de l'efficacité de cette combinaison réalisée à l'étape d'estimation (E2) est considérée positive.

Diagnostic device for diagnosing need for change of particle filter of car, has particle filter's ageing indicator formed by average distance values that indicate frequency of occurrence of event generated by dysfunction of filter

L'invention concerne un dispositif de diagnostic de nécessité de changement de filtre à particules de véhicule automobile, le dispositif étant configuré pour comparer (160,170,180,190,200) un indicateur de vieillissement (110,120,130,140,150) du filtre à particules à un seuil (210,220,230,240,250), l'indicateur de vieillissement (110,120,130,140,150) étant une valeur indiquant une fréquence d'apparition d'au moins un évènement (1,2,3,4,5) généré par un ou des dysfonctionnement(s) du filtre à particules.

Exhaust gas treatment equipment operating method for motor vehicle internal combustion engine, involves correcting characteristic quantity representing load state of filter using modeled spatial distribution of gas particles

Procédé de mise en oeuvre d'une installation de traitement de gaz d'échappement comportant un filtre à particules dans un moteur à combustion interne, notamment d'un véhicule automobile, selon lequel on détermine une grandeur caractéristique de l'état de charge du filtre à particules à partir de caractéristiques de fonctionnement du filtre à particules. On modélise la distribution spatiale des particules de gaz d'échappement essentiellement dans la direction longitudinale du filtre à particules et avec cette distribution spatiale modélisée des particules de gaz d'échappement on corrige la grandeur caractéristique.

PROCEEDED OF DIAGNOSIS OF the FAILURES Of a FILTER Of a LINE Of EXHAUST OF GASES Of an INTERNAL COMBUSTION ENGINE

METHOD AND DEVICE FOR DETECTING MALFUNCTION OF A FILTER ELEMENT OF AN EXHAUST LINE

L'invention porte sur un procédé et un dispositif permettant de détecter un dysfonctionnement d'un élément filtrant de gaz d'échappement d'un véhicule automobile à motorisation hybride thermique/électrique, le dispositif comprenant un capteur de suie cumulatif (5) en aval de l'élément filtrant (4) et qui se charge de suie en un temps prédéterminé lorsque l'élément filtrant (4) fonctionne normalement, le temps entre une régénération du capteur et sa saturation étant mesuré et un signal étant engendré qui indique si la motorisation est tout électrique ou non, et, si la motorisation est tout électrique, la mesure de temps associée au capteur de suie cumulatif (5) étant interrompue jusqu'à ce que la motorisation ne soit plus tout électrique.

PROCESS AND SYSTEM OF REGENERATION OF the FILTER HAVE PARTICLES Of a THERMAL ENGINE

Le procédé de régénération du filtre à particules disposé dans la ligne d'échappement d'un moteur thermique comprend les étapes suivantes : a) après chaque mise en route du moteur thermique, on mesure un paramètre représentatif de l'état du moteur thermique et/ou de la ligne d'échappement, b) lorsque le paramètre mesuré révèle que le moteur et/ou la ligne d'échappement sont froids, on fige le paramètre représentatif de la masse de suie accumulée mesuré avant le dernier arrêt du moteur, c) on détermine continuellement l'écart entre le paramètre représentatif de cette masse figée et le paramètre représentatif de la masse mesurée à l'instant t, d) lorsque cet écart a convergé, on ajoute cet écart au paramètre représentatif de la masse figée et on utilise cette valeur corrigée pour la poursuite du processus de régénération.

적어도 하나의 배기 파이프 내의 입자 질량과 관련된 물리량의 감시를 위한 방법 및 시스템

... 본 발명은 적어도 하나의 연소 엔진의 하류에 배치된 적어도 하나의 배기 파이프 내에서 입자 질량(M)과 관련된 양을 감시하는 방법 및 시스템을 제공한다. 본 시스템은 적어도 하나의 연소 엔진의 하류에 배치된 적어도 하나 또는 다수의 입자 필터들에 걸쳐서의 압력 차이(dP)의 감소량(Δ)을 결정하기 위하여 배치된 제1 결정 장치를 포함한다. 이러한 감소량(Δ)은 적어도 하나 또는 다수의 대응 기준 입자 필터들에 걸쳐서의 압력 차이(dP)와 관련된다. 본 시스템은 입자 질량(M)과 관련된 양을 결정하기 위하여 배치된 제2 결정 장치를 또한 포함하고, 그 결정은 압력 차이(dP)의 결정된 감소량(Δ) 및 감소량(Δ)과 입자 질량(M)과 관련된 양 사이의 사전-결정 상호-관계에 기초하며, 따라서 적어도 하나의 배기 파이프 내의 하나 또는 다수의 매연 센서의 이용이 회피될 수 있다. 본 시스템은 양을 설정 문턱 값(Mth)과 비교하기 위하여 배치된 비교 장치를 또한 포함한다. 본 시스템은 비교의 결과와 관련된 적어도 하나의 지시를 제공하기 위하여 배치된 제공 장치를 또한 포함한다.

METHOD AND APPARATUS FOR DETECTING SOOT CONCENTRATION IN PARTICULATE TRAP

SOOT DISCHARGE ESTIMATING DEVICE FOR INTERNAL COMBUSTION ENGINES

A Soot discharge is calculated by multiplying a "steady discharge" by a "transient correction". The steady discharge is the Soot discharge in a steady running state, and is acquired by a table retrieval. For the individual factors to exert influences on the Soot discharge, the steady values (the table-retrieved values) and the transient values (the current values) of the factors are substituted into characteristic equations on the Soot discharge for the factor values so that steady characteristic values and transient characteristic values are individually acquired, and the "ratios between the steady characteristic values and the transient characteristic values" are calculated. The transient correction is obtained by multiplying all the "ratios between the steady characteristic values and the transient characteristic values" for the individual factors, and is calculated as the "coefficient expressing the degree of the deviation of the Soot discharge from the steady discharge", into which ...

METHOD FOR DIAGNOSING A PARTICLE FILTER BY MEANS OF A SOOT CAPTURING DEVICE

The invention relates to a method for diagnosing a particle filter by means of a soot capturing device, said method being based on the direct processing of the temporal signal supplied by the soot capturing device (CAP) and the use of values available (PAR) in the control unit of the heat engine. Said data allows a classification (CLA) of an indicator correlated to the cumulated quantity of soot (RES) in a multidimensional space (GRA). A malfunction of the particle filter is determined according to the classification (CLA).

ABNORMALITY DETECTION APPARATUS FOR AN EXHAUST GAS EMISSION CONTROL APPARATUS

An abnormality detection apparatus (100) for an exhaust gas emission control apparatus (20) is provided in an exhaust system of an internal combustion engine (200) and traps particulate matter (PM) in exhaust gas. The abnormality detection apparatus (100) includes: a sensor (30) that is provided downstream of the exhaust gas emission control apparatus (20) and detects the particulate matter; a removal device that removes the particulate matter trapped in the exhaust gas control apparatus (20) based on an output of the sensor (30); and a determination device (40) that determines whether the exhaust gas emission control apparatus (20) is in an abnormal state based on a first stabilization time that has elapsed until the output of the sensor (30) becomes stable after completion of removal of the particulate matter performed by the removal device.

TEST FIXTURE FOR COLLECTING PARTICULATE MATERIAL

A test fixture (10) for collecting particulate matter carried in the exhaust gas stream of an engine has a pair of coaxially aligned mounting plates (14, 20, 26), each having a filter cartridge holder (18, 24) mounted thereon. One of the mounting plates (20) is moveable with respect to the other along a predefined longitudinal axis of the test fixture between an open position, whereat a filter cartridge is easily placed or removed, and a closed position at which a filter media mounted in the filter cartridge is sealed during a prescribed test sequence. An actuator (30) mounted on a third coaxially aligned mounting plate (26) has an extendable rod connected to the second mounting plate (20) to effect movement of the second mounting plate (20) between the open and closed position.

METHOD AND DEVICE FOR THE COMPREHENSIVE CHARACTERISATION AND MONITORING OF EXHAUST GASES AND THE REGULATION OF ENGINES IN PARTICULAR INTERNAL COMBUSTION ENGINES AND COMPONENTS FOR THE TREATMENT OF EXHAUST GASES

The device of modular construction permits the simultaneous or also non-simultaneous recording and characterisation of the solid and liquid particles and the gaseous components of the exhaust gases on various test supports, with only small or no modification of the test support. The methods are based on the individual or combined usage of laser-induced dispersion, laser-induced breakdown spectroscopy, laser-induced ionisation spectroscopy, laser-induced atomic fluorescence spectroscopy, IR-/VIS-/UV-laser absorption spectroscopy and laser-induced incandescence. The use of individual or combined usage of devices of the above type permits the analysis of the raw exhaust gas, the conditioned and/or treated exhaust gases for monitoring and checking the working pattern of the engine, the individual components of the exhaust gas treatment and/or the total system on test beds and on the vehicle and can be used for control of the motor and/or exhaust components, such as for example catalysts and ...

METHOD AND SYSTEM FOR EXHAUST PARTICULATE MATTER SENSING

Methods and systems are provided for a particulate matter sensor positioned downstream of a diesel particulate filter in an exhaust system. In one example, a particulate matter sensor may include a spherical assembly with an oblong chamber located therein. 1. A particulate matter sensor assembly , comprising:a spherical assembly;an inner device positioned within an outer device of the spherical assembly, offset with a geometric center of the outer device; anda sensor element located on an outer surface of the inner device, proximal to a narrowest passage between the outer device and the inner device.2. The assembly of claim 1 , wherein the inner device is rigidly mounted in the outer device via a flow tube and a support.3. The assembly of claim 2 , wherein the flow tube is oblique to a vertical axis of the outer device and positioned against a downstream surface of the outer device relative to a direction of exhaust gas flow.4. The assembly of claim 2 , wherein the support is perpendicular to the flow tube and positioned against an upstream surface of the outer device claim 2 , and where the support is solid and the flow tube is hollow.5. The assembly of claim 1 , wherein the sensor element is cylindrical and positioned around a greatest diameter of the inner device.6. The assembly of claim 1 , wherein the inner device comprises an interior chamber located therein claim 1 , and the spherical assembly comprises an annular space located between the outer and inner devices claim 1 , further comprising an inner device outlet fluidly coupling the interior chamber to the annular space.7. The assembly of claim 6 , wherein the inner device comprises a first cutout corresponding to the inner device outlet near a top of the inner device and a second cutout corresponding to a flow tube near a bottom of the inner device.8. The assembly of claim 1 , wherein the inner device is completely spaced away from and suspended within the outer device claim 1 , and where the outer device ...

System for controlling particulate filter temperature

A system for controlling the temperature of a particulate filter coupled to an exhaust outlet of an internal combustion engine includes a controller responsive to volumetric flow and temperature of exhaust gas to determine a filter regeneration parameter. In a hybrid electric-engine vehicle application, various control strategies are implemented as a function of the regeneration parameter to control exhaust gas temperature suitably for proper regeneration of the particulate filter. Such strategies include shifting the duty cycle of the engine toward lower engine speed operation along lines of constant power output, modifying the ratio of electrical power and engine power and controlling recharging of the battery supplying electrical energy to the vehicle's electric drive motor under vehicle deceleration conditions. In vehicle applications including a transmission coupled directly to the engine, shift points of the transmission are modified as a function of the regeneration parameter to ...

Method and system for combustion engine particulate filter regeneration

A method for regenerating a particulate filter in an exhaust system of a combustion engine. The method: (a) measures, every time the combustion engine is started, a parameter representative of a condition of the combustion engine and/or of the exhaust system, (b) when the measured parameter reveals that the engine and/or the exhaust system are cold, the parameter representative of the mass of accumulated soot measured before the engine was last turned off is frozen, (c) the deviation between the frozen mass parameter and the parameter representative of the mass measured at time t is continuously determined, and (d) when the deviation has been resolved by convergence, it is added to the frozen mass parameter and the resulting corrected value is used in an ongoing regeneration process.

EXHAUST GAS CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

An exhaust gas control apparatus includes: a fuel injection valve configured to inject fuel into an internal combustion engine; a catalyst provided in an exhaust passage and configured to clean exhaust gas; a filter provided on a downstream side of the catalyst; a fuel introducing unit configured to introduce the fuel, which is injected from the fuel injection valve, into the exhaust passage from the internal combustion engine in an unburnt state; and a load control unit configured to control an upper limit of a load on the internal combustion engine. In the exhaust gas control apparatus, the load control unit is configured to set, when the fuel is supplied to the exhaust passage in the unburnt state, the upper limit of the load to a second limit value lower than a first limit value, which is an upper limit of the load before the injection. 1. An exhaust gas control apparatus , comprising:a fuel injection valve configured to inject fuel into an internal combustion engine;a catalyst provided in an exhaust passage of the internal combustion engine and configured to clean exhaust gas;a filter provided on a downstream side of the catalyst in the exhaust passage and configured to collect particulate matter;a fuel introducing unit configured to introduce the fuel, which is injected from the fuel injection valve, into the exhaust passage from the internal combustion engine in an unburnt state; anda load control unit configured to control an upper limit of a load on the internal combustion engine, whereinthe load control unit is configured to set, when the fuel is supplied to the exhaust passage in the unburnt state, the upper limit of the load to a second limit value lower than a first limit value, which is an upper limit of the load before the injection.2. The exhaust gas control apparatus according to claim 1 , further comprising a throttle valve provided in an intake passage of the internal combustion engine claim 1 , whereinthe load control unit is configured to ...

METHODS OF DETECTING REPLACEMENT OF A PARTICULATE MATTER FILTER

Methods of monitoring replacement of a diesel particulate filter (DPF) by a non-particulate matter filter. The disclosed methods takes into account a change in delta pressure based soot load estimates (DPSLE) over time to detect whether the DPF has been replaced. The estimate, which is measured by the delta pressure drop across the filter, can be used to determine whether a device that does not have the capability of trapping soot, such as a muffler, has been inserted.

METHOD AND DEVICE FOR DIAGNOSING A PARTICLE FILTER

A method for diagnosing a particle filter arranged in the waste gas line of an internal combustion engine has the steps of: executing at least one fuel injection, measuring HC emission in the waste gas line in the direction of flow of the waste gas behind the particle filter, and diagnosing a defect of the particle filter based on the measured HC emission.

ABNORMALITY DETECTION APPARATUS FOR FILTER

An abnormality detection apparatus comprises a filter, a catalyst adapted to remove NOx with supply of HC, an HC supply unit, a PM sensor and a control unit. The control unit is configured, while particulate matter is made to deposit in the PM sensor in order to determine whether or not the filter has an abnormality, to cause the HC supply unit to supply HC to the catalyst in such a way as to make the quantity of heat generated in the catalyst smaller when the temperature around the PM sensor is higher than a prescribed temperature than when the temperature around the PM sensor is lower than the prescribed temperature, or when the flow speed around the PM sensor is higher than the prescribed flow speed than when the flow speed around the PM sensor lower than the prescribed flow speed.

Particulate matter detection and method for operating a particulate matter sensor

A method of detecting particulate matter on a particulate matter sensor includes the steps of measuring an electrical characteristic associated with the sensor, determining a value corresponding to the impedance across the sensor, and compensating the impedance for the temperature at which it was determined. The method further includes determining an estimate of the total amount of particulate matter accumulated while limiting the effects of large particles captured on the sensor or blown off the sensor. The information produced by the method may be used to provide diagnostic information regarding a particulate control system.

Exhaust purification

Method and apparatus for controlling the regeneration of a particle filter in an exhaust gas system of an internal combustion engine

System for controlling the regeneration of the exhaust gas filter in the exhaust system of an IC engine of a motor vehicle The method includes measuring the loss of load of the exhaust gas in the filter (3), and triggering a regeneration of the filter by combustion of the soot, when this loss of load passes a predetermined threshold (DeltaPs) function of the functioning point of the engine. The carbon monoxide concentration in the exhaust gas is monitored, from the exit of the filter during this regeneration and it is stopped when this concentration falls below a predetermined level.

EXHAUST GAS PURIFYING APPARATUS

PROBLEM TO BE SOLVED: To purify exhaust gas stably without deteriorating a fuel cost in an exhaust gas purifying apparatus of a diesel engine. SOLUTION: The exhaust gas purifying apparatus includes: a primary diesel particulate filter installed in a primary exhaust line of the diesel engine; a secondary exhaust line branched from the primary exhaust line at a branch point on the upstream side of the primary diesel particulate filter; a secondary diesel particulate filter which is installed in the secondary exhaust line, and has a smaller soot storage capacity than the primary diesel particulate filter; a low pressure part, out of the secondary exhaust line, which is provided on the downstream side of the secondary diesel particulate filter, and applies lower pressure than that of the branch point; and a differential pressure measuring part for measuring a differential pressure generated between an inlet and an outlet of the secondary diesel particulate filter. The secondary exhaust line ...

СПОСОБ ОБНАРУЖЕНИЯ ОТРАВЛЕНИЯ СЕРОЙ В СИСТЕМЕ ОЧИСТКИ ВЫХЛОПА

Изобретение относится к системе доочистки выхлопа для двигателя внутреннего сгорания. Система доочистки выхлопа для двигателя внутреннего сгорания,содержит по меньшей мере один окислительный нейтрализатор дизельных выхлопных газов (DOC) и/или по меньшей мере один фильтр твердых частиц дизельных выхлопных газов (DPF), по меньшей мере один катализатор избирательного восстановления (SCR-катализатор), устройство подачи восстанавливающего агента, первый ΝΟ-датчик (12), расположенный выше по потоку от упомянутого DOC и/или DPF, второй ΝΟ-датчик (14), расположенный ниже по потоку от упомянутого SCR-катализатора, и по меньшей мер, один температурный датчик (16), выполненный с возможностью измерения температуры потока выхлопных газов и формирования на ее основе по меньшей мере первого температурного сигнала (Τ1). Способ включает этапы, на которых: измеряют содержание смесей NOX2 окислов азота ниже по потоку от упомянутого SCR-катализатора, когда восстанавливающий агент не подается; измеряют температуру ...

СПОСОБ (ВАРИАНТЫ) ПЕРЕВОРОТА КОРПУСА САЖЕВОГО ФИЛЬТРА

Изобретение может быть использовано в двигателях внутреннего сгорания транспортных средств. Способ переворота корпуса сажевого фильтра заключается в том, что замыкают разрыв между пространственно разделенными верхним по потоку выпускным каналом и нижним по потоку выпускным каналом с помощью сажевого фильтра. Поворачивают корпус сажевого фильтра вокруг смещения оси от центральной оси сажевого фильтра для перевода сажевого фильтра между первым положением и вторым положением в ответ на определение того, что оператор находится вне транспортного средства, содержащего сажевый фильтр. Способ предусматривает этап, на котором определяют, что оператор находится вне транспортного средства. Раскрыты варианты способа переворота корпуса сажевого фильтра. Технический результат заключается в уменьшении обратного давления отработавших газов. 3 н. и 3 з.п. ф-лы, 7 ил.

УСТРОЙСТВО ДЛЯ ОЧИСТКИ ОТРАБОТАВШИХ ГАЗОВ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к устройствам для очистки отработавших газов двигателя внутреннего сгорания. Устройство включает в себя катализатор (7) окислов азота (NOx), расположенный в выпускном трубопроводе (3) двигателя (1) внутреннего сгорания для восстановления окислов азота с помощью восстанавливающего агента, подаваемого к нему, устройство (6) подачи, которое подает мочевину к катализатору (7) окислов азота выше по потоку относительно катализатора (7) окислов азота, фильтр (5), расположенный в выпускном трубопроводе выше по потоку относительно устройства (6) подачи, чтобы улавливать твердые частицы (ТЧ) в отработавших газах. Ниже по потоку относительно катализатора (7) окислов азота установлен датчик (17) ТЧ, который измеряет количество твердых частиц в отработавших газах, и блокиратор, который блокирует определение повреждения фильтра (5), используя измеренное значение датчика (17) ТЧ, когда количество твердых частиц, налипших на катализатор (7) окислов азота, равно или больше порогового ...

СПОСОБ (ВАРИАНТЫ) И СИСТЕМА ДЛЯ РЕГЕНЕРАЦИИ БЕНЗИНОВОГО САЖЕВОГО ФИЛЬТРА

СПОСОБ (ВАРИАНТЫ) И СИСТЕМА ДЛЯ ОБНАРУЖЕНИЯ УТЕЧКИ В САЖЕВОМ ФИЛЬТРЕ

БЛОК УПРАВЛЕНИЯ ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к блоку управления для двигателя внутреннего сгорания. Устройство управления для двигателя внутреннего сгорания содержит: датчик твердых частиц, установленный в выхлопном патрубке двигателя внутреннего сгорания, захватывающий частицы фильтр, выполненный с возможностью захватывать твердые частицы, содержащиеся в выхлопном газе, и расположенный в выхлопном патрубке в месте выше по потоку относительно датчика твердых частиц; электронный блок управления, выполненный с возможностью обнаруживать количество частиц в выхлопном газе через выхлопной патрубок в ответ на выходной сигнал датчика твердых частиц; электронный блок управления, выполненный с возможностью подавать напряжение захвата частиц между электродами датчика твердых частиц во время первого периода с тем, чтобы формировать слой частиц на поверхностях электродов датчика твердых частиц; и электронный блок управления, выполненный с возможностью останавливать подачу напряжения захвата частиц во время второго периода ...

Verfahren und Vorrichtung zur definierten Regeneration von rußbehafteten Oberflächen

Es wird ein Verfahren und eine Vorrichtung zur definierten Regeneration einer rußbehafteten Oberfläche (30), insbesondere einer keramischen Sensoroberfläche, vorgeschlagen, wobei die an der Oberfläche (30) haftenden Rußpartikel durch eine dielektrisch behinderte Entladung (DBE) (55) mittels einer Entladungsvorrichtung (35) verbrannt werden. Dabei wird die Leistung der DBE so eingestellt, dass eine höhere Abtragrate der Rußpartikel als ihre Anlagerungsrate an der Oberfläche (30) bewirkt wird. Nach der Regenerationsphase wird die verbliebene Rußablagerung mittels einer an der Oberfläche (30) angebrachten Messvorrichtung (20) detektiert. Ein undefinierter Zustand der Sensoroberfläche (30) tritt nicht auf. Die Entladungsvorrichtung (35) und die Messvorrichtung (20) können sehr kompakt an einem oder an zwei keramischen Trägerelementen (10, 15) angebracht sein.

Vorrichtung zur Ermittlung des Beladungszustands von Partikelfiltern

Abgasemissions-Steuerungssystem

Method for evaluating filtering effect of particulate filter in exhaust gas passage of diesel engine in motor car, involves evaluating filtering effect of particulate filter from soot mass, soot concentration or filtering efficiency

The method involves calculating a mean value (18) from tripping time for an exhaust gas volumetric flow, exhaust gas temperature and a difference between the exhaust gas temperature and temperature of a particle sensor during a measurement cycle of the particle sensor. A soot mass and soot concentration or filtering efficiency of the particulate filter are determined (23) from the tripping time and the mean value, and filtering effect of the particulate filter is evaluated (24) from the soot mass, the soot concentration or the filtering efficiency. An independent claim is also included for a device for evaluating filtering effect of a particulate filter in an exhaust gas passage of a combustion engine.

Verfahren und Systeme für ein Abgasbehandlunngssystem

Es werden verschiedene Systeme und Verfahren für ein Motorsystem mit einem Abgasbehandlungssystem, welches einen Partikelfilter aufweist, beschrieben. In einem beispielhaften Verfahren werden angesammelte Kohlenwasserstoffe aus dem Abgasbehandlungssystem entfernt, indem eine Abgastemperatur als Reaktion auf eine Partikelfilterregenerationsanforderung während eines länger andauernden Kaltleerlaufbetriebs auf einen ersten Temperaturwert erhöht wird. Nach einer vorab festgelegten Dauer wird die Abgastemperatur auf einen zweiten, höheren Temperaturwert erhöht, um den Partikelfilter zu regenerieren.

Verfahren zur Überprüfung der Funktionsfähigkeit eines Partikelfilters

Es wird ein Verfahren zur Überprüfung der Funktionsfähigkeit eines im Abgasstrang eines Kraftfahrzeugmotors angeordneten Partikelfilters beschrieben. Mit diesem Verfahren, mit dem die Änderungen des Filterwirkungsgrades während einer starken Änderung der Partikelrohemissionen bewertet werden, ist eine Erkennung eines Offset-Fehlers in der Konzentrationsmessung möglich. Hierdurch können Fehldiagnosen in der Partikelfilterüberwachung bzw. -überprüfung reduziert oder ausgeschlossen werden.

Verfahren und Vorrichtung zur umfassenden Charakterisierung und Kontrolle des Abgases und der Regelung von Motoren, speziell von Verbrennungsmotoren, und von Komponenten der Abgasnachbehandlung

Verfahren zur Bestimmung der Art, der Zusammensetzung und/oder der Konzentration in Form von Anzahl-, Massen- und/oder Volumenkonzentration der einzelnen festen, flüssigen und/oder gasförmigen Komponenten motorischer Abgase im Abgasstrang hinter dem Motor im Rohzustand oder im konditionierten und/oder verdünnten Zustand oder hinter Komponenten der Abgasnachbehandlung , wobei zur Bestimmung die durch Anregung mit einem Laser, einer Laserdiode oder einem Diodenlaser im Untersuchungsbereich erzeugte Raman-Strahlung detektiert und verwendet wird.

Verfahren zur Überwachung eines Partikelfiltersystems im Abgasstrang einer Brennkraftmaschine

Verfahren zur Überwachung eines Partikelfiltersystems im Abgasstrang einer Brennkraftmaschine, wobei der Beladungszustand des Partikelfilters jeweils über eine erste Methode und über eine zweite Methode ermittelt wird, und wobei aus den nach diesen beiden Methoden ermittelten Beladungszuständen der Quotient gebildet wird, dadurch gekennzeichnet, dass die erste Methode vom Schwefelgehalt des Kraftstoffs unabhängig ist und die zweite Methode vom Schwefelgehalt des Kraftstoffs abhängig ist, und aus dem Quotienten der Schwefelgehalt des für die Brennkraftmaschine verwendeten Kraftstoffs abgeleitet wird, welcher die Alterung des Partikelfiltersystems beeinflusst.

SYSTEM ZUR UNTERSTÜTZUNG DER REGENERIERUNG VON ENTGIFTUNGSMITTELN

Verfahren zur Überwachung eines Rußpartikelfilters

Verfahren zur Überwachung eines in einem Abgasstrang (9) angeordneten Rußpartikelfilters (5), bei dem ein in Strömungsrichtung hinter dem Rußpartikelfilter (5) angeordnete Rußsensor (6) in aufeinanderfolgenden Heizvorgängen (19) wiederholt aufgeheizt wird und mit Hilfe eines am Rußsensor (6) ausgebildeten Temperatursensors (8, 9) aus Kenngrößen des Heizvorgangs (19) die Rußbeladung des Rußsensors (6) bestimmt wird, dadurch gekennzeichnet, dass zwischen aufeinanderfolgenden Heizvorgängen (19) die Temperatur des Abgasstromes in Strömungsrichtung vor und hinter dem Rußpartikelfilter (5) gemessen und eine Temperaturdifferenz aus den gemessenen Temperaturen gebildet wird und mit einer aus den Parametern der Motorsteuerung bekannten strömenden Gasmenge die Exothermie eines Regenerationsvorgangs des Rußpartikelfilters (5) bestimmt wird, wobei die Exothermie anhand der Temperaturdifferenz und der bekannten strömenden Gasmenge bestimmt wird.

Verfahren zum Betreiben einer Abgasanlage für eine Brennkraftmaschine

Es wird ein Verfahren zum Betreiben einer Abgasanlage (10) für eine Brennkraftmaschine (12) beschrieben, wobei die Abgasanlage (10) mindestens eine erste und mindestens eine zweite katalytische Beschichtung umfasst, und wobei die zweite katalytische Beschichtung im Abgasstrom stromabwärts der ersten katalytischen Beschichtung angeordnet ist. Erfindungsgemäß wird zeitweise eine zusätzliche Menge von Kohlenwasserstoffen stromaufwärts der ersten katalytischen Beschichtung in das Abgas derart eingebracht, dass eine wärmeerzeugende Reaktion in der zweiten katalytischen Beschichtung stattfinden kann. Mittels mindestens eines Temperatursensors (38b, 38c) und/oder mindestens eines Kohlenwasserstoffsensors (40) und/oder mindestens einer Lambdasonde (34b, 34c) wird stromaufwärts und/oder stromabwärts der zweiten katalytischen Beschichtung mindestens eine Eigenschaft des Abgases ermittelt, welche eine Reaktion der zweiten katalytischen Beschichtung als Folge der zusätzlichen Menge von Kohlenwasserstoffen ...

VERFAHREN UND SYSTEM ZUR ÜBERPRÜFUNG DER FUNKTIONSFÄHIGKEIT EINES TEILCHENDETEKTORS

Abgasfilter für Kraftfahrzeuge

Abgasfilter für einen Verbrennungsmotor zur temporären Filterung von Feinstaub, Dieselruß, Stickoxiden, Kohlenmonoxiden oder Kohlenwasserstoffen mit einer Anbringungsvorrichtung, einer Befestigungsvorrichtung, einer Filtervorrichtung mit einem Filtermedium, wobei der Abgasfilter als letzte Komponente am Ende eines Abgasstrangs angeordnet werden kann und der Abgasfilter oder Komponenten des Abgasfilters, insbesondere die Filtervorrichtung oder das Filtermedium mit geringem Aufwand am Auspuffendrohr montierbar bzw. austauschbar sind.

VERFAHREN ZUR REGENERATION EINES KRAFTFAHRZEUGTEILCHENFILTERS UND SYSTEM ZUR STEUERUNG DER REGENERATION SOLCH EINES FILTERS

VERFAHREN UND SYSTEM ZUM RATIONALISIEREN EINES DELTADRUCKSENSORS FÜR EINEN BENZINPARTIKELFILTER IN EINEM FAHRZEUGANTRIEBSSYSTEM

Ein Fahrzeugantriebssystem beinhaltet einen Partikelfilter mit einem Einlass in Verbindung mit einem Abgasauslass eines Motors, einen Differenzdrucksensor, der den Differenzdruck zwischen dem Partikelfiltereinlass und dem Partikelfilterauslass misst, ein Rußmassenmodul, das eine Rußmasse unabhängig von einem Differenzdruck über dem Partikelfilter bestimmt, und ein erstes Rußmodell, das eine Rußmasse im Partikelfilter unabhängig von einem Differenzdruck über dem Partikelfilter in Beziehung setzt, ein Differenzdruckmodul, das einen Differenzdruck über den Partikelfilter basierend auf der bestimmten Rußmasse, einem Abgasstrom und einem zweiten Rußmodell schätzt, und ein Vergleichsmodul, das den geschätzten Differenzdruck mit dem Differenzdrucksignal des Differenzdrucksensors vergleicht.

Method of detecting a doser valve opening or closing event

A method of detecting a valve opening or closing event in a solenoid operated reductant injector valve comprises applying a voltage with a chopped waveform to the solenoid to actuate the valve. The resultant current through the solenoid is sampled at local maxima 13, 15, 17 and minima 14, 16. Values of the difference between local maxima and subsequent local minima or between local minima and subsequent local maxima are determined. A valve opening or closing event is determined based on the rate of change of the difference values. The valve opening or closing time may be determined from the rate of change. Valve opening and closing events are determined from a plot of values of the current at local maxima or local minima. The first or second derivatives of the plot may be compared to a threshold. The sampling times may be synchronised with the modulation signal with respect to the voltage drive.

Determining an estimate of soot load in a diesel particulate filter using a radio frequency sensor

Diagnosis of the condition of an exhaust particle filter

A method of protecting a diesel particulate filter from overheating

Method of estimating soot using a radio frequency sensor

A method of calibrating a soot load estimating function for a diesel particulate filter using measurements of radio frequency attenuation and temperature. The method comprises identifying a mean attenuation that exceeds a standard deviation threshold and using this as a reference value, using a data library to obtain a gradient corresponding to a linear approximation between mean attenuation and soot load for a given temperature, and using the reference value to determine an axis intercept value for use as an offset value for calibrating measurements of the soot load. The method can be extended to incorporate further gradient values at different temperatures. This method serves to limit the effect of resonant frequencies on the value of the mean attenuation, and accurately determines an initial inference for soot load.

Method of controlling operation of an exhaust gas treatment apparatus

An engine apparatus (500, fig 1) comprises an internal combustion engine (510, fig 1) and an exhaust gas treatment apparatus (550, fig 1) having a diesel oxidation catalyst (520, fig 1) upstream of a second aftertreatment module (530, fig 1) such as a diesel particulate filter (DPF) or a selective catalytic reduction (SCR) catalyst. Where a numerical indication of an efficiency of the second aftertreatment module falls below a first threshold value, a first limit on engine speed is implemented. When an engine safe condition is reached, a primary cleaning process (regeneration) is carried out comprising injecting fuel into the engine after an engine combustion event such that the fuel passes through the engine without combusting for the fuel to combust in the diesel oxidation catalyst to increase exhaust gas temperature in the diesel oxidation catalyst by a target amount, and removing the first limit on engine speed and targeting an engine speed set point, which is at a higher speed than ...

Particulate filter ash loading prediction method and vehicle using same

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.

Particulate filter ash loading prediction method and vehicle using same

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.

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

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.

Particulate filter diagnostics

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.

Exhaust particulate filter system and methods

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.

Particulate filter regeneration process diagnostic

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.

Abnormality determination device for particulate matter detection sensor

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.

Methods And System For Ash Detection In Exhaust Particulate Filter

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.

Exhaust gas purification system of working machine

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.

Exhaust gas processing device

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.

Exhaust gas purification system

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.

Failure detecting apparatus for particulate filter

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.

Differential pressure-based enablement of a particulate filter diagnostic

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.

Exhaust gas purification system of working machine

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.

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

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 ...

SYSTEM AND METHOD FOR ADAPTING COMBUSTION TO MITIGATE EXHAUST OVERTEMPERATURE

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 ...

Radio Frequency Process Sensing, Control, and Diagnostics Network

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.

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

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 ...

Control device for internal combustion engine

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.

INTERNAL COMBUSTION ENGINE CONTROL DEVICE

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 ...

Filtration systems with multitiered data exchange capabilities

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.

Gasoline particulate filter brick detection techniques

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.

INTERNAL COMBUSTION ENGINE AND EXHAUST-GAS-COMPONENT ESTIMATING METHOD

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 ...

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

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 ...

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

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 ...

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

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.

REGENERATION OF DIESEL PARTICLE FILTER

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, ...

Exhaust System for a Motor Vehicle

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.

METHOD FOR CONTROLLING AN EXHAUST GAS TREATMENT SYSTEM

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 ...

Catalyst abnormality diagnostic device and catalyst abnormality diagnostic method

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.

EXHAUST GAS SYSTEM

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 ...

METHOD OF PROTECTING A DIESEL PARTICULATE FILTER FROM OVERHEATING

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 ...

METHOD OF CONTROLLING A PARTICULATE FILTER

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 ...

GASOLINE PARTICULATE FILTER DIAGNOSTICS

Methods and systems are provided for diagnostics of a gasoline particulate filter in an exhaust system. In one example, a method may include indicating degradation of a hose coupled across a particulate filter responsive to a difference between a first differential pressure and a second differential pressure being greater than a threshold, the first differential pressure measured by a differential pressure sensor positioned in the hose responsive to a downstream exhaust tuning valve being fully open, the second differential pressure measured by the differential pressure sensor responsive to the exhaust tuning valve being fully closed. 1. A method of operating a vehicle having an engine and a particulate filter coupled in an engine exhaust system , comprising:indicating degradation of a hose coupled across a particulate filter responsive to a difference between a first differential pressure and a second differential pressure being greater than a threshold, the first differential pressure measured by a differential pressure sensor positioned in the hose responsive to a downstream exhaust tuning valve being fully open, the second differential pressure measured by the differential pressure sensor responsive to the exhaust tuning valve being fully closed, wherein the exhaust tuning valve is coupled across a muffler positioned in an exhaust passage of the exhaust system downstream of a connection point, the connection point including a location where an outlet of the hose is configured to couple to the exhaust passage or to the particulate filter.2. (canceled)3. The method of claim 2 , wherein the first differential pressure and the second differential pressure are each measured responsive to hose diagnostic conditions being met claim 2 , and further comprising claim 2 , when hose diagnostic conditions are not met claim 2 , adjusting the exhaust tuning valve based on an operator-specified noise mode.4. The method of claim 1 , further comprising claim 1 , responsive to the ...

Exhaust purification device for internal combustion engine

An exhaust gas purification device includes a diesel particulate filter (DPF) that collects particulate matter (PM) from an exhaust gas, a urea water spray unit that sprays urea water into the exhaust gas, a selection catalytic reduction (SCR) device that reduces and purifies NO x of the exhaust gas, a capacitance detecting unit that detects capacitance of the DPF, a PM accumulation calculating unit that calculates an amount of accumulated PM on the basis of the capacitance, an NO 2 consumption estimating unit that calculates an amount of consumed NO 2 on the basis of the amount of accumulated PM, and a control unit that controls an engine such that a ratio of NO to NO 2 flowing into the SCR approaches 1:1 on the basis of the estimated consumption.

FAILURE DETECTION DEVICE FOR FUEL ADDITION VALVE

A controller recognizes that fuel is and is not actually injected when an amplitude of fuel pressure fluctuations detected by a pressure sensor is not less than and is less than a pressure threshold α, respectively, to obtain a number N of actual fuel injections and determines that a fuel addition valve operates normally and has malfunction when a ratio (N/S) of the obtained numbers N of the actual fuel injections to a number S of the fuel injection commands is not less than and is less than a number ratio threshold β, respectively. 1. A device for detecting failure of a fuel addition valve which injects fuel from a fuel pump through a fuel addition pipe to exhaust gas flowing through an exhaust pipe comprisinga pressure sensor incorporated in said fuel addition pipe for detecting fuel pressure fluctuations upon injection of the fuel by said fuel addition valve anda controller for recognizing that the fuel is actually injected when an amplitude of the fuel pressure fluctuations detected by said pressure sensor is not less than a pressure threshold αnd that the fuel is not actually injected when the amplitude of the fuel pressure fluctuations detected by said pressure sensor is less than the pressure threshold to thereby obtain a number of actual fuel injections and for determining that said fuel addition valve operates normally when a ratio of said number of the actual fuel injections to a number of fuel injection commands is not less than a number ratio threshold αnd that said fuel addition valve has malfunction when the ratio of said number of the actual fuel injections to the number of the fuel injection commands is less than the number ratio threshold. The present invention relates to a device for detecting failure of a fuel addition valve.Generally, particulates (particulate matter) contained in exhaust gas from a diesel engine are mainly constituted by carbonic soot and a soluble organic fraction (SOF) of high-boiling hydrocarbon and contain a trace of sulfate ...

CONTROLLER AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE

A controller is configured to control an internal combustion engine. The controller is configured to execute a catalyst temperature-increasing control of increasing a temperature of the three-way catalyst device by introducing air-fuel mixture, which contains the fuel injected by a fuel injection valve, into an exhaust passage without burning the air-fuel mixture in a cylinder. The controller includes an air-fuel ratio control unit configured to control an air-fuel ratio of the air-fuel mixture during the execution of the catalyst temperature-increasing control such that the air-fuel ratio becomes a richer air-fuel ratio during a first period from a beginning of the catalyst temperature-increasing control to a specified air-fuel ratio switching timing than during a second period from the air-fuel ratio switching timing to a completion of the catalyst temperature-increasing control. 1. A controller configured to control an internal combustion engine , the internal combustion engine including:a fuel injection valve;a cylinder into which air-fuel mixture containing fuel injected by the fuel injection valve is introduced;an ignition device that ignites the air-fuel mixture introduced into the cylinder with a spark;an exhaust passage through which gas discharged out of the cylinder flows; anda three-way catalyst device arranged in the exhaust passage, whereinthe controller is configured to execute a catalyst temperature-increasing control of increasing a temperature of the three-way catalyst device by introducing the air-fuel mixture, which contains the fuel injected by the fuel injection valve, into the exhaust passage without burning the air-fuel mixture in the cylinder, andthe controller comprises an air-fuel ratio control unit configured to control an air-fuel ratio of the air-fuel mixture during the execution of the catalyst temperature-increasing control such that the air-fuel ratio becomes a richer air-fuel ratio during a first period from a beginning of the ...

SYSTEM AND METHOD FOR MONITORING PARTICULATE FILTER CONDITION IN AN AFTERTREATMENT SYSTEM

A system and method for monitoring filtering condition in an aftertreatment system comprises measuring a first pressure upstream of a first particulate filter in the aftertreatment system. A second pressure downstream of the first particulate filter and upstream of a second particulate filter in the aftertreatment system is measured. A third pressure downstream of the second particulate filter is also measured. A difference in pressure between the second pressure and the third pressure is determined which corresponds to a filtering condition of the first particulate filter. The difference in pressure is compared with a predetermined threshold. If the difference in pressure exceeds the predetermined threshold the failure of the first particulate filter is identified. 1. A method for monitoring filtering condition in an aftertreatment system , comprising:measuring a first pressure difference across a first particulate filter in the aftertreatment system;measuring a second pressure difference across a second particulate filter in the aftertreatment system, the second particulate filter positioned downstream of the first particulate filter and upstream of a selective catalytic reduction system; anddetermining a filtering condition of the first particulate filter based on the first pressure difference and the second pressure difference.2. The method of claim 1 , further comprising:comparing the second pressure difference with a predetermined threshold; andif the second pressure difference exceeds the predetermined threshold, identifying a failure of the first particulate filter.3. The method of claim 2 , further comprising:providing an indication to a user of the failure of the first particulate filter.4. The method of claim 1 , wherein the first pressure difference and the second pressure difference are measured using differential pressure sensors.5. The method of claim 1 , wherein the first pressure difference is determined by measuring a first pressure upstream of the ...

REGENERATION OF PARTICULATE FILTERS IN AUTONOMOUSLY CONTROLLABLE VEHICLES

Embodiments for regeneration a particulate filter in a motor vehicle having a self-control mode for the autonomous control of a drive mode and having a diesel particulate filter disposed in the exhaust system of a diesel engine of the motor vehicle are provided. In one example, a method for protecting the diesel particulate filter from overheating and premature aging comprises: starting the self-control mode, starting/verifying a regeneration process of the diesel particulate filter with combustion of the soot particles adsorbed on the diesel particulate filter, and monitoring a temperature of the diesel particulate filter and/or of the exhaust gas directed through the diesel particulate filter during the regeneration process. Depending on a monitoring result of the monitoring, a control for the self-control mode of the motor vehicle can be adjusted. 1. A method for protecting a diesel particulate filter from overheating and premature aging , wherein the diesel particulate filter is disposed in the exhaust system of a diesel engine of a motor vehicle , and wherein the motor vehicle has a self-control mode for the autonomous control of a drive mode of the motor vehicle , comprising:starting the self-control mode,starting or verifying a regeneration process of the diesel particulate filter with burning of the soot particulates adsorbed on the diesel particulate filter,monitoring a temperature of the diesel particulate filter and/or of the exhaust gas directed through the diesel particulate filter during the regeneration process, andresponsive to a monitoring result of the monitoring, adjusting a control of the self-control mode of the motor vehicle.2. The method as claimed in claim 1 , wherein the adjustment of the control changes at least one of:a gear to be used in a transmission of the motor vehicle,a speed to be reached by the motor vehicle,an acceleration and/or deceleration profile to be achieved by the motor vehicle,an acceleration and/or deceleration gradient ...

DIAGNOSTIC METHODS FOR A HIGH EFFICIENCY EXHAUST AFTERTREATMENT SYSTEM

An apparatus includes a nitrogen oxide (NOx) module and a selective catalytic reduction (SCR) diagnostic module. The NOx module is in exhaust gas communication with an exhaust flow of an exhaust aftertreatment system from an engine. The NOx module is structured to interpret NOx data indicative of an amount of NOx exiting the engine and an amount of NOx exiting the exhaust aftertreatment system, and determine a NOx conversion efficiency fault is present based on the amount of NOx exiting the engine and the amount of NOx exiting the exhaust aftertreatment system. The SCR diagnostic module is structured to determine at least one of a SCR catalyst and a diesel particulate filter including a coating of a SCR reaction catalyst (DPF-SCR) are responsible for the NOx conversion efficiency fault based on at least one of a reductant slip amount and a NOx conversion value across at least one of the SCR catalyst and the DPF-SCR. 1. An apparatus , comprising: interpret NOx data indicative of an amount of NOx exiting the engine and an amount of NOx exiting the exhaust aftertreatment system; and', 'determine a NOx conversion efficiency fault is present based on the amount of NOx exiting the engine and the amount of NOx exiting the exhaust aftertreatment system; and, 'a nitrogen oxide (NOx) module in exhaust gas communication with an exhaust flow of an exhaust aftertreatment system from an engine, the NOx module structured toa selective catalytic reduction (SCR) diagnostic module structured to determine at least one of a SCR catalyst of the exhaust aftertreatment system and a diesel particulate filter having a coating of a SCR reaction catalyst (DPF-SCR) of the exhaust aftertreatment system are responsible for the NOx conversion efficiency fault based on at least one of a reductant slip amount and a NOx conversion value across at least one of the SCR catalyst and the DPF-SCR.2. The apparatus of claim 1 , wherein the SCR diagnostic module is structured to determine the DPF-SCR is ...

NOVEL METHOD FOR DIAGNOSING SCR CATALYST AND FEED GAS QUALITY IN A DIESEL AFTER-TREATMENT SYSTEM

An exhaust diagnostic system. The system includes a diesel engine having an exhaust system with a diesel particulate filter (DPF), a diesel oxidation catalyst (DOC), a selective catalytic reduction (SCR) catalyst, a first NOx sensor located upstream of the SCR catalyst and a second NOx sensor located downstream of the SCR catalyst. In addition, an engine control unit (ECU) is in electronic communication with the first NOx sensor and the second NOx sensor. An SCR coordinator can be included and be configured to execute a non-intrusive SCR deNOx efficiency test, an intrusive SCR/DOC deNOx efficiency test and an intrusive DOC non-methane hydrocarbon (NMHC) conversion efficiency test on the exhaust system. As a result of the conversion efficiency tests, a distinction can be made as to whether the SCR catalyst or DOC is failing. 1. An exhaust diagnostic system for a diesel engine , said system comprising:a diesel engine having an exhaust system with a DPF, DOC and SCR catalyst, said diesel engine operable to supply exhaust gas to flow through said exhaust system;a first NOx sensor located upstream of said SCR and a second NOx sensor located downstream of said SCR catalyst;an ECU in electronic communication with said first NOx sensor and said second NOx sensor;an SCR coordinator configured to execute a non-intrusive SCR deNOx efficiency test on said exhaust system, said SCR coordinator also configured to execute an intrusive SCR/DOC deNOx efficiency test when said non-intrusive SCR deNOx efficiency is below a first predetermined threshold after a DPF regeneration event and an intrusive DOC NMHC conversion efficiency test when said intrusive SCR/DOC deNOx efficiency is below a second predetermined threshold on said exhaust system after said DPF regeneration event;said ECU configured to determine that said SCR is degrading when said intrusive DOC NMHC conversion efficiency test determines said DOC efficiency is not below a third predetermined threshold and to determine that ...

METHOD FOR DETERMINING DEGRADATION OF NOx STORAGE REDUCTION CATALYST IN EXHAUST GAS AFTERTREATMENT DEVICE

An occlusion cycle and a rich reduction cycle are repeated alternately in a NOx occlusion reduction catalyst connected to an exhaust pipe of an engine. When a NOx occlusion rate decreases while the occlusion cycle and the rich reduction cycle are being repeated, a sulphur purge is performed. A NOx occlusion map, which indicates the NOx occlusion amount of the NOx occlusion reduction catalyst during the occlusion cycle, as affected by aging degradation, is prepared in advance, and an ideal NOx occlusion amount is determined based on the NOx occlusion map. In the meantime, an actual NOx occlusion amount during the occlusion cycle is calculated from a NOx sensor value. Degradation of the NOx occlusion reduction catalyst due to sulfur poisoning is distinguished from thermal degradation of the NOx occlusion reduction catalyst based on the difference between the ideal NOx occlusion amount and the actual NOx occlusion amount. 1. A method of determining degradation of a NOx occlusion reduction catalyst in an exhaust gas aftertreatment device , the NOx occlusion reduction catalyst being connected to an exhaust pipe of an engine , the exhaust gas aftertreatment device being configured to perform repeatedly and alternately an occlusion cycle for occluding NOx contained in an exhaust gas with the NOx occlusion reduction catalyst , and a rich reduction cycle for reducing and purifying the occluded NOx when a NOx occlusion rate drops during the occlusion cycle , the exhaust gas aftertreatment device being configured to carry out sulphur purge when the NOx occlusion reduction catalyst is poisoned by sulfur and the NOx occlusion rate drops while the occlusion cycle and the rich reduction cycle are being repeated , said method comprising:preparing, in advance, a NOx occlusion map, which indicates the NOx occlusion amount of the NOx occlusion reduction catalyst during the occlusion cycle, based on aging degradation;obtaining an ideal NOx occlusion amount based on the NOx occlusion ...

Method and system for exhaust particulate matter sensing

Methods and systems are provided sensing particulate matter by a particulate matter sensor positioned downstream of a diesel particulate filter in an exhaust system. In one example, a method may include increasing an inlet opening of the particulate matter sensor when an exhaust flow rate falls below a threshold to allow more particulates to enter the particulate matter sensor and further includes decreasing the inlet opening when the exhaust flow rate rises above the threshold to reduce the particulates entering the sensor. By adjusting the amount of particulates entering the sensor based on the exhaust rate, the rate of deposition of the sensor and hence the sensitivity of the senor to the exhaust flow rate may be maintained at a desired level, and independent of the exhaust flow rate.

METHODS AND SYSTEMS FOR AN EXHAUST GAS AFTERTREATMENT SYSTEM

Systems and methods are described for performing a diagnostic on an exhaust gas aftertreatment system. A gas entry parameter into a portion of an exhaust system of an engine is determined. In response to determining that the gas entry parameter is less than the predetermined threshold, a level of NH3 in the exhaust gas is determined. In response to determining that the level of NH3 is above a threshold value, degradation of a particulate filter of the exhaust gas aftertreatment system is indicated. 1. A diagnostic method for an exhaust gas aftertreatment system , the method comprising:determining a gas entry parameter into a portion of an exhaust system of an engine;in response to determining that the gas entry parameter is less than a predetermined gas entry parameter threshold, determining a level of NH3 in the exhaust gas; andin response to determining that the level of NH3 is above a threshold NH3 value, indicating degradation of a particulate filter of the exhaust gas aftertreatment system.2. The method according to claim 1 , wherein the level of NH3 in the exhaust gas is determined using a NOx sensor.3. The method according to claim 2 , wherein the NOx sensor is provided at a position upstream of the particulate filter in the exhaust gas aftertreatment system.4. The method according to claim 1 , wherein claim 1 , in response to determining that the gas entry parameter is less than a predetermined threshold claim 1 , injecting NH3 into the exhaust system.5. The method according to claim 4 , wherein NH3 is injected at a position upstream of the particulate filter in the exhaust gas aftertreatment system.6. The method according to claim 1 , wherein claim 1 , in response to determining that the gas entry parameter is less than a predetermined threshold claim 1 , recirculating exhaust gas through the exhaust system.7. The method according to claim 6 , wherein the exhaust gas is recirculated using a low pressure exhaust gas recirculation system.8. The method ...

Exhaust gas purification system

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.

ELECTROSTATIC PM SENSOR ELECTRODE DIAGNOSTICS

Particulate matter (PM) sensors and diagnostics performed using the PM sensors are disclosed. The PM sensors and diagnostics may be used in exhaust systems, such as vehicle exhaust systems, to detect soot. In at least one embodiment, an electrostatic particulate matter (PM) sensor is provided including first and second spaced apart electrodes forming a bulk gap therebetween having a bulk distance and a localized gap therebetween having a localized distance less than the bulk distance. A controller may be configured to control a voltage between the electrodes to induce an electrostatic discharge at the localized gap at a lower voltage than at the bulk gap. Various diagnostics may be performed using the disclosed PM sensors, including a wiring/continuity diagnostic, a soot detection plausibility diagnostic, and/or an installation diagnostic. 1. An electrostatic particulate matter (PM) sensor , comprising:first and second spaced apart electrodes forming a bulk gap therebetween having a bulk distance and a localized gap therebetween having a localized distance less than the bulk distance; anda controller configured to control a voltage between the electrodes to induce an electrostatic discharge at the localized gap at a lower voltage than at the bulk gap.2. The PM sensor of claim 1 , wherein the localized gap is formed by a protrusion extending from one of the first or second electrodes towards the other.3. The PM sensor of claim 2 , wherein the localized gap is formed by a protrusion extending from each of the first and second electrodes towards the other.4. The PM sensor of claim 2 , wherein the protrusion is integrally formed with the electrode from which it extends.5. The PM sensor of claim 2 , wherein the protrusion comprises a different material than the electrode from which it extends.6. The PM sensor of claim 1 , wherein the localized distance is at least 5% smaller than the bulk distance.7. The PM sensor of claim 1 , wherein the localized distance is at least ...

Radio Frequency Process Sensing, Control, and Diagnostics Network and System

A radio frequency sensing, control, and particulate matter diagnostics network and system and method and, more specifically, a radio frequency particulate filter diagnostics system comprising a housing including an inlet connected to a source of particulate matter, a particulate filter in the housing and adapted for filtering the particulate matter, and a radio frequency sensor adapted to detect conditions of abnormal particulate filter or system operation and including at least one radio frequency probe configured to be in contact with the housing for the particulate filter housing and adapted to receive radio frequency signals and a radio frequency control unit in communication with the radio frequency probe. 1. A radio frequency sensing , control , and particulate matter diagnostics system comprising:a housing including an inlet connected to a source of particulate matter;a particulate filter in the housing adapted for filtering the particulate matter;a radio frequency sensor adapted to detect conditions of abnormal particulate filter or system operation including the absence of the particulate filter from the system, the absence of the particulate filter in the housing being detected by sensing a change in the magnitude, frequency, or phase of the radio frequency signals outside a threshold range of the magnitude, frequency, or phase of the radio frequency signals with the particulate filter present in the system, the radio frequency sensor including at least one radio frequency probe in contact with the housing for the particulate filter and adapted to receive radio frequency signals;and a radio frequency control unit in communication with the radio frequency probe.2. The system of claim 1 , wherein the radio frequency sensor is adapted to monitor the time rate of change of the response of the radio frequency sensor to detect a rate of particulate matter accumulation in the particulate filter above or below a threshold value.3. The system of claim 2 , wherein ...

Particulate Matter Sensor

A particulate matter sensor assembly including a resistance sensor and a resonance sensor. Each one of the resistance sensor and the resonance sensor is configured to measure particulate matter present in engine exhaust.

Method for determining the aging of an oxidation catalyst in an exhaust gas aftertreatment system of an internal combustion engine, method for detecting ash in a particle filter of an exhaust gas aftertreatment system, control device, and internal combustion engine

A method for determining the aging of an oxidation catalyst in an exhaust gas aftertreatment system of an internal combustion engine, having the following steps: ascertaining a soot burn rate of a particle filter of the exhaust gas aftertreatment system; adapting a function having at least one adaptation parameter to the soot burn rate dependent on at least one variable, a value of the adaptation parameter depending on an aging of the oxidation catalyst; and determining the aging of the oxidation catalyst using the adaptation parameter value ascertained by adapting the function.

Method and exhaust system for checking a loading state of a particle filter

A method for checking a load condition of a particulate filter in an exhaust line of an internal combustion engine, wherein the exhaust line comprises at least the particulate filter, a first lambda sensor that is arranged upstream from the particulate filter, and a second lambda sensor that is arranged downstream from the particulate filter, includes at least the following steps: introducing an exhaust gas with an excess of oxygen into the exhaust line upstream from the first lambda sensor, there being a temperature of at least 500° C. in the particulate filter; detecting the excess of oxygen by the first lambda sensor at a first time; detecting the excess of oxygen by the second lambda sensor at a second time; and determining a load condition of the particulate filter from a time difference between the first time and the second time. The invention further relates to an exhaust system of a motor vehicle.

PREDICTIVE METHODS FOR EMISSIONS CONTROL SYSTEMS PERFORMANCE

Particulate filters are used to remove particulate matter such as soot and ash in the emissions control systems of vehicles, including gasoline direct injection (GDI) engines. Methods are provided to predict the long-term performance and durability of emissions control systems having particulate filters. The methods account for factors such as thermal aging, soot accumulation and regeneration, and ash loading. 1. A method of predicting performance of an emissions control system comprising a particulate filter over an in-service lifetime , comprising:conducting an aging test comprising operating an engine through an aging profile, wherein the engine is operated for an aging time and at an aging temperature; andmeasuring the weight gain of the particulate filter after the aging test.2. The method of claim 1 , wherein the aging profile comprises multiple cycles and wherein each cycle comprises a first mode operated for a first time (t) claim 1 , a second mode operated for a second time (t) claim 1 , and a third mode operated for loading third time (t).3. The method of claim 2 , wherein each of t claim 2 , t claim 2 , and tis about 0.25 hours to about 2 hours.4. The method of claim 2 , wherein at least one mode is performed using a doped fuel.5. The method of claim 4 , further comprising calculating the predicted total ash loading (AL) using an ash loading equation:{'br': None, 'sub': total', 'total, 'i': '*m', 'AL=FC%*CR %'}wherein m % is a weight percent of a dopant in a fuel, and CR % is a percent ash collection rate in the emissions control system.6. The method of claim 1 , wherein the aging time and the aging temperature are determined by:conducting a road cycle comprising driving a test vehicle wherein the emissions control system is equipped with a particulate filter for a road cycle time, wherein the particulate filter comprises a filter inlet and a filter bed;collecting a plurality of measurements of a filter inlet temperature versus road cycle time and of a ...

Method of detecting a doser valve opening or closing event

A method of detecting a valve opening or closing event in a solenoid operated reductant injector valve includes applying a voltage to the solenoid to actuate the valve, the voltage having a chopped waveform. A resultant current through the solenoid is sampled at local maxima and minima. Values of a difference between the local maxima and subsequent local minima or between local minima and subsequent local maxima are determined. A rate of change of the difference values are determined and a valve opening or closing event based on the rate of change is determined.

SYSTEMS AND METHODS FOR PARTICULATE FILTER LOAD ESTIMATION

Methods and systems are provided for monitoring a change in exhaust particulate filter (PF) soot load during an engine non-combusting condition. In one example, a method may include, responsive to a higher than threshold PF temperature immediately prior to an engine shutdown, estimating a rate of soot burn when the engine is no longer combusting, and estimating a soot load on the PF during and at an onset of immediately subsequent engine start based in part on the rate of soot burn. 1. A method , comprising:estimating soot loading of a particulate filter (PF), coupled to an exhaust of an engine, during an engine shutdown period to account for soot oxidation during the engine shut down period based on a temperature of the PF at shutdown and a corresponding temperature profile of the PF during the engine shutdown period.2. The method of claim 1 , further comprising claim 1 , estimating an initial soot loading of the PF immediately prior to engine shutdown based on one or more of exhaust pressure claim 1 , exhaust temperature claim 1 , engine load claim 1 , engine speed claim 1 , and time elapsed since an immediately previous PF regeneration.3. The method of claim 2 , wherein estimating soot loading of the PF during the engine shutdown period includes claim 2 , estimating a rate of soot burn as a function of on one or more of the temperature of the PF at shutdown claim 2 , the corresponding temperature profile of the PF during the engine shutdown period claim 2 , the initial soot loading of the PF immediately prior to the engine shutdown claim 2 , and an amount of oxygen flowing via the PF during the engine shutdown period.4. The method of claim 3 , further comprising claim 3 , estimating an amount of soot burned during the engine shutdown period based on each of the rate of soot burn and the initial soot loading of the PF immediately prior to the engine shutdown.5. The method of claim 2 , wherein the temperature profile of the PF during the engine shutdown period is ...

ON-BOARD DIAGNOSTIC METHODS FOR PARTIAL FILTRATION FILTERS

A system for and method of diagnosing operation of a partial filtration filter exhaust aftertreatment system are provided. An upstream exhaust temperature value is determined in an exhaust system upstream of at least one of a diesel oxidation catalyst (DOC) component and a first partial flow filter (PFF) component. A downstream exhaust temperature value is determined in the exhaust system downstream of a second PFF component positioned downstream of the at least one of the DOC component and the first PFF component. A frequency difference is determined between a first frequency content of the upstream exhaust temperature value and a second frequency content of the downstream exhaust temperature value. If the frequency is less than a predetermined threshold, it is determined that at least one of the DOC component and the PFF component are not present in the exhaust system. 1. A partial filtration filter diagnostic system for an exhaust system , comprising:an upstream exhaust temperature module configured to determine an upstream exhaust temperature value in an exhaust system upstream of at least one of a diesel oxidation catalyst (DOC) component and a partial flow filter (PFF) component, the PFF component downstream of the DOC component;a downstream exhaust temperature module configured to determine a downstream exhaust temperature value in the exhaust system downstream of the PFF component; and 'determine a frequency difference in a first frequency content of the upstream exhaust temperature value and second frequency content of the downstream exhaust temperature value.', 'a frequency analysis module configured to2. The partial filtration filter diagnostic system of claim 1 , wherein the frequency analysis module is further configured to:if the frequency difference is less than a predetermined threshold, determine that at least one of the DOC component and the PFF component is not present in the exhaust system; andif it is determined that at least one of the DOC ...

EXHAUST GAS TREATMENT DEVICE

An exhaust gas treatment device () includes a combustion waste gas inlet pipe (), an outlet pipe, an essentially gas-tight inner housing () fluidically connected with the inlet pipe and fluidically connected with the outlet pipe. The inner housing receives a particle filter (). A connection element () is arranged in a connection area () of the inner housing. The connection area fluidically faces the outlet pipe (), for mechanically connecting the particle filter with the inner housing. An oxidation catalytic converter () is arranged upstream of the particle filter in the inner housing for catalyzing an oxidation reaction of the combustion waste gas. A counterpressure monitoring point () is provided fluidically between the oxidation catalytic converter and the connection element for measuring a counterpressure exerted by the particle filter during the operation of the treatment device. An internal combustion engine () is provided with the treatment device. 1. An exhaust gas treatment device comprising:an inlet pipe for admitting a combustion waste gas;an outlet pipe for discharging the combustion waste gas;a particle filter;an essentially gas-tight housing connected with the inlet pipe and connected with the outlet pipe, the gas-tight housing for receiving the particle filter;a connection element arranged in a connection area of the gas-tight housing, said connection area fluidically facing the outlet pipe, for mechanically connecting the particle filter with the gas-tight housing;an oxidation catalytic converter, arranged in the gas-tight housing upstream of the particle filter, for catalyzing an oxidation reaction of the combustion waste gas; anda counterpressure-measurement point provided fluidically between the oxidation catalytic converter and the connection element for measuring a counterpressure exerted by the particle filter during operation of the exhaust gas treatment device.2. An exhaust gas treatment device in accordance with claim 1 , wherein the ...

Control unit for internal-combustion engine

According to the invention, a particulate matter sensor is installed in an exhaust passage of an internal-combustion engine. A control unit for this internal-combustion engine detects a particulate amount in an exhaust gas through the exhaust passage in response to an output from the particulate matter sensor. Further, the control unit for the internal-combustion engine forms a particulate layer on electrode surfaces of the particulate matter sensor by applying a particulate capturing voltage between the electrodes during a first period. Further, the control unit maintains the formed particulate layer during a second period. It is noted here that the phrase “maintain the formed particulate layer” includes the meanings “maintaining the formed particulate layer as it is” and “inhibiting control to remove the particulate layer”.

EXHAUST GAS PURIFICATION APPARATUS OF INTERNAL COMBUSTION ENGINE

An exhaust gas purification apparatus of an internal combustion engine of the invention includes an electrical heating catalyzer. The catalyzer includes a catalyst carrier which produces heat when the catalyst carrier is energized, a pair of electrodes provided on the catalyst carrier, a casing which houses the catalyst carrier and at least one insulation member provided between the catalyst carrier and the casing. The apparatus executes a PM removal control for increasing a temperature of the electrical heating catalyzer by using energy discharged from the engine to an exhaust passage to remove particulate matter from the catalyzer in response to temperature of the particulate matter and an insulation resistance value between the catalyst carrier and the casing satisfying a predetermined removal condition. 2. The exhaust gas purification apparatus of the internal combustion engine according to claim 1 , wherein the electronic control unit is configured to execute the PM removal control in response to the electronic control unit estimating that no water adheres to the electrical heating catalyzer and the estimated PM temperature and the acquired resistance value satisfying the predetermined removal condition.3. The exhaust gas purification apparatus of the internal combustion engine according to claim 1 , wherein the electronic control unit is configured:to acquire the estimated PM temperature acquired at a time of acquiring the acquired resistance value as a particular PM temperature;to convert the acquired resistance value on the basis of the particular PM temperature to acquire a converted resistance value corresponding to the acquired resistance value to be acquired when the particular PM temperature corresponds to a predetermined base temperature;to determine that the predetermined removal condition is satisfied and execute the PM removal control when the converted resistance value is smaller than a predetermined first resistance threshold which is a threshold ...

PARTICULATE DETECTION SYSTEM

A particulate detection system detects the amount of particulates contained in filtered exhaust gas which has passed through a filter and is discharged to the outside of the vehicle. The particulate detection system includes a sensor disposed on the downstream side of the filter; a sensor circuit section which drives the sensor and obtains in real time a sensor output corresponding to the volumetric particulate amount of the particulates contained in the filtered exhaust gas; and a computation section which computes a distance particulate amount which is the weight or number of the particulates discharged per unit travel distance on the basis of the sensor output obtained by the sensor circuit section, travel distance of the vehicle, and flow rate of the exhaust gas. 1. A particulate detection system for detecting an amount of particulates contained in filtered exhaust gas , the system comprising:a sensor disposed on a downstream side of a filter that collects the particulates from an exhaust gas to form the filtered exhaust gas;a sensor circuit section which drives a sensor and obtains in real time a sensor output corresponding to a volumetric particulate amount of the particulates contained in the filtered exhaust gas; anda computation section which computes a distance particulate amount which is a weight or number of the particulates discharged per unit travel distance based on the sensor output, a travel distance of a vehicle, and a flow rate of the exhaust gas.2. The particulate detection system according to claim 1 , wherein the computation section includes:a particulate amount computation section which computers the volumetric particulate amount using the sensor output obtained at predetermined time intervals;a first integration section which integrates the volumetric particulate amount over a predetermined detection period to thereby compute an integral volumetric particulate amount in the detection period; anda first computation section which computes the ...

Exhaust Gas Purification System of Internal Combustion Engine

In an exhaust gas purification system having an oxidation catalyst and an exhaust gas purifying unit formed so as to include a filter and a selective reduction-type NOx catalyst, at least one of supply of the fuel component and supply of ammonia or an ammonia precursor in an amount that is increased when a prescribed condition under which a part of a fuel component supplied to exhaust gas passes through to a downstream side of the oxidation catalyst is satisfied as compared to a non-passing time supply amount that is a supply amount of ammonia or the ammonia precursor to be supplied when the prescribed condition is not satisfied is controlled such that ammonia for NOx selective reduction by the increased ammonia or ammonia precursor reaches the exhaust gas purifying unit before the passed fuel component. Accordingly, an effect of a fuel component supplied to exhaust gas on a NOx purification performance of the selective reduction-type NOx catalyst is minimized in the exhaust gas purification system of the internal combustion engine which includes the filter and the selective reduction-type NOx catalyst.

METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE, CONTROL DEVICE AND INTERNAL COMBUSTION ENGINE

A method for operating an internal combustion engine with an exhaust gas after treatment system, which includes at least one particulate filter. The method is characterized by a parameter-controlled partial regeneration of the particulate filter. 115-. (canceled)16. A method for operating an internal combustion engine with an exhaust gas after-treatment system that has at least one particle filter , the method comprising parameter-controlled partial regeneration of the particle filter.1716. The method according to , wherein the at least one particle filter has a functional coating.18. The method according to claim 17 , wherein the functional coating is a selectively catalytically reducing or an oxidatively acting coating.19. The method according to claim 16 , including detecting a differential pressure that drops across the particle filter claim 16 , wherein the partial regeneration of the particle filter is carried out if the differential pressure reaches or exceeds a predetermined upper pressure limiting value claim 16 , wherein the partial regeneration is open-loop or closed-loop controlled as a function of the differential pressure.20. The method according to claim 19 , including ending the partial regeneration when the differential pressure reaches or undershoots a predetermined lower pressure limiting value.21. The method according to claim 19 , including determining a load of the particle filter claim 19 , wherein the partial regeneration is carried out when the load reaches or exceeds a predetermined upper load limiting value.22. The method according to claim 21 , including ending the partial regeneration when the load reaches or undershoots a predetermined lower load limiting value.23. The method according to claim 21 , including using the load and the differential pressure as parameters for the open-loop or closed-loop control of the partial regeneration.24. The method according to claim 19 , further including carrying out plausibility checking after the ...

Method and system for particulate filter leakage detection

Methods and systems are provided for determining degradation of a particulate filter in an exhaust conduit. In one example, a method may include diverting exhaust gas to a secondary soot sensor assembly comprising a second filter downstream of a first filter, and determining degradation based on time intervals between subsequent filter regenerations of the second filter in the secondary soot sensor assembly.

EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

An emission control device for an internal combustion engine is configured to perform a particulate matter trap function of trapping, with a particulate filter, particulate matter contained in exhaust gas which flows in an exhaust passage of the internal combustion engine. The emission control device includes a controller. The controller is configured to calculate a particulate matter accumulation amount, which is a total amount of particulate matter trapped by the particulate filter based on an operation condition of the internal combustion engine. The controller is configured to stop calculating the particulate matter accumulation amount when the particulate matter trap function is not functioning. 1. An emission control device for an internal combustion engine , the emission control device configured to perform a particulate matter trap function of trapping , with a particulate filter , particulate matter contained in exhaust gas which flows in an exhaust passage of the internal combustion engine , the emission control device comprising a controller , calculate a particulate matter accumulation amount, which is a total amount of particulate matter trapped by the particulate filter based on an operation condition of the internal combustion engine, and', 'stop calculating the particulate matter accumulation amount when the particulate matter trap function is not functioning., 'wherein the controller is configured to'}2. The emission control device according to claim 1 , further comprising a pressure sensor configured to detect upstream pressure in an exhaust gas flow of a position in the exhaust passage where the particulate filter is designed to be provided claim 1 ,wherein the controller is configured to determine that the particulate matter trap function is not functioning if the upstream pressure calculated based on an output signal from the pressure sensor is less than upstream pressure that is estimated based on an assumption that the particulate filter is ...

EXHAUST GAS ANALYZING SYSTEM AND PUMPING DEVICE

Disclosed is an exhaust gas analyzing system which includes a main flow passage provided with a PM collection filter, a diluted exhaust gas sampling flow passage connected upstream of the PM collection filter of the main flow passage for sampling a part of diluted exhaust gas, a diluted exhaust gas flow rate adjusting mechanism connected downstream of the PM collection filter of the main flow passage, and control equipment altering a setting flow rate of the diluted exhaust gas flow rate adjusting mechanism depending on a flow rate of sampling diluted exhaust gas flowing through the diluted exhaust gas sampling flow passage. 1. An exhaust gas analyzing system for sampling a part of or a whole of an exhaust gas emitted from an internal combustion engine , diluting the exhaust gas for analysis , and analyzing the resulting gas , the system comprising:an exhaust gas flow passage through which the exhaust gas flows;a dilution gas flow passage through which dilution gas flows;a main flow passage connected to the exhaust gas flow passage and to the dilution gas flow passage, that flows a diluted exhaust gas resulting from mixing the exhaust gas and the dilution gas with each other, and which is provided with a first analyzing equipment for analyzing the exhaust gas;a diluted exhaust gas sampling flow passage connected to the main flow passage at an upstream side of the first analyzing equipment for sampling a part of the diluted exhaust gas from the main flow passage for introduction to a second analyzer for analyzing the exhaust gas;a diluted exhaust gas flow rate adjusting mechanism connected to the main flow passage at a downstream side of the first analyzing equipment that adjusts a flow rate of the diluted exhaust gas flowing through the main flow passage; anda control equipment that alters a setting flow rate of the diluted exhaust gas flow rate adjusting mechanism on the basis of a sampling flow rate of the diluted exhaust gas flowing through the diluted exhaust ...

EXHAUST SYSTEM HAVING DIFFERENTIAL PRESSURE SENSOR

An exhaust system having a differential pressure sensor may include an intake pipe that houses fresh air from the outside to supply the fresh air to a turbocharger; an exhaust pipe that supplies an EGR gas, having passed through a Diesel Particulate Filter (DPF) to upstream of the turbocharger to mix with the fresh air; and a differential pressure sensor that measures a pressure difference between the front end portion and the rear end portion of the DPF, wherein the differential pressure sensor is directly mounted in the exhaust pipe that is disposed at the rear end portion of the DPF. 1. An exhaust system having a differential pressure sensor , the exhaust system comprising:an intake pipe that houses air from an outside thereof to supply the air to a turbocharger;an exhaust pipe that supplies a portion of an exhaust gas, having passed through a Diesel Particulate Filter (DPF) to upstream of the turbocharger to mix the portion of the exhaust gas with the air; anda differential pressure sensor that measures a pressure difference between a front end portion and a rear end portion of the DPF,wherein the differential pressure sensor is directly mounted in the exhaust pipe that is disposed at the rear end portion of the DPF.2. The exhaust system of claim 1 , wherein the differential pressure sensor includes:a first pressure valve that is connected with upstream side of the DPF; anda second pressure valve that is connected with downstream side of the DPF,wherein in a side portion of the exhaust pipe, a valve receiving portion that is extended in a horizontal direction thereof in a pillar shape having an open inside is formed, andwherein, to insert and mount the second pressure valve into a valve receiver, an internal circumference of the valve receiver is formed in a shape corresponding to an external circumference of the second pressure valve.3. The exhaust system of claim 2 , wherein the second pressure valve is mounted in a direction horizontal to the ground in the ...

MIXED FUEL SYSTEM

The present invention provides a novel combination of devices to measure and transmit to an electronic controller data pertaining to differential pressures, temperatures, regeneration status, exhaust content, accumulated gas consumption and substitute fuel consumption. The electronic controller compares the data to thresholds; when the controller receives signals indicating these thresholds or limits are met, the controller causes the gas substitution rate to be diminished or set to zero until after-treatments elements are fully regenerated thereby facilitating integration of a mixed fuel system with an application internal combustion engine. 1. A dual fuel controller configured to:receive a manifold air pressure signal from a manifold air pressure sensor;calculate a manifold air pressure based on the received manifold air pressure signal;calculate an expected manifold air pressure;adjust the calculated manifold air pressure based on the expected manifold air pressure;calculate a manifold air pressure voltage based on the adjusted manifold air pressure; andsend the calculated manifold air pressure voltage to an engine control module.2. The dual fuel controller of claim 1 , further configured to:control a switch to prevent the manifold air pressure signal from reaching the engine control module.3. The dual fuel controller of claim 1 , further configured to:Read a manifold air pressure calculated by the engine control module.4. The dual fuel controller of claim 3 , further configured to:Adjust the further adjust the calculated manifold air pressure using the manifold air pressure calculated by the engine control module.5. The dual fuel controller of claim 1 , wherein the dual fuel controller includes a one dimensional table for calculating the manifold air pressure. This application is a continuation-in-part application of U.S. patent application Ser. No. 16/291,141 which was filed with the United States Patent and Trademark Office on Mar. 4, 2019 and which claims the ...

COMBINING MODEL AND DELTA PRESSURE BASED SOOT LOAD ESTIMATES

A system for estimating an amount of soot in an exhaust particulate filter includes a delta P soot load estimate generator configured to generate a first soot load estimate as a function of a pressure drop and a mass flow of exhaust. The system further includes a model estimate generator configured to generate a second soot load estimate as a function of a modeled engine performance. A trust factor generator is configured to determine a trust factor signal as a function of at least one engine operating characteristic, and a decision generator is configured to determine whether to use the first soot load estimate or the second soot load estimate as a function of the trust factor signal. 1. A system for estimating an amount of soot in an exhaust particulate filter , comprising:(a) a delta P soot load estimate generator configured to generate a first soot load estimate as a function of a pressure drop and a mass flow of exhaust;(b) a model estimate generator configured to generate a second soot load estimate as a function of a modeled engine performance;(c) a trust factor generator configured to determine a trust factor signal as a function of at least one engine operating characteristic; and(d) a decision generator configured to determine whether to use the first soot load estimate or the second soot load estimate as a function of the trust factor signal.2. The system of claim 1 , wherein the trust factor signal is a binary signal.3. The system of claim 1 , further comprising a low-pass filter configured to filter a signal received from the delta P soot load estimate generator.4. The system of claim 3 , wherein the low-pass filter is configured to reset when the trust factor signal changes from a first value to a second value.5. The system of claim 4 , wherein the system is configured to start a regeneration cycle when a soot load estimate being used is greater than a predetermined maximum value.6. A method for estimating an amount of soot in an exhaust particulate ...

Methods and systems for rotating an exhaust aftertreatment device

Methods and systems are provided for inverting a particulate filter housing. In one example, a method may include inverting the particulate filter housing to dislodge an ash load in the particulate filter.

EXHAUST AFTERTREATMENT SYSTEM DIAGNOSTIC AND CONDITIONING

A diagnostic engine calibration module is provided that is structured to diagnose a vehicle system by causing the vehicle system to operate outside of one or more calibration parameters. The diagnostic engine calibration module includes a diesel particulate filter (DPF) pressure module structured to determine a pressure differential across a DPF of an engine of the vehicle system and compare the determined pressure differential against a plurality of predetermined fault thresholds to diagnose the DPF, the plurality of predetermined fault thresholds including a predetermined minimum pressure threshold and a predetermined maximum pressure threshold. 1. An apparatus , comprising: 'a diesel particulate filter (DPF) pressure module structured to determine a pressure differential across a DPF of an engine of the vehicle system and compare the determined pressure differential against a plurality of predetermined fault thresholds to diagnose the DPF, the plurality of predetermined fault thresholds including a predetermined minimum pressure threshold and a predetermined maximum pressure threshold.', 'a diagnostic engine calibration module structured to diagnose a vehicle system by causing the vehicle system to operate outside of one or more calibration parameters, wherein the diagnostic engine calibration module includes2. The apparatus of claim 1 , wherein the diagnostic engine calibration module is structured to only operate the vehicle system when the engine is immobilized.3. The apparatus of claim 1 , wherein the diagnostic engine calibration module is structured to operate the vehicle system when the engine is turned on.4. The apparatus of claim 1 , wherein the diagnostic engine calibration module includes a DPF ash restriction module structured to determine an amount of ash that remains on the diesel particulate filter and trigger a fault if the amount of ash meets or exceeds an upper threshold.5. The apparatus of claim 4 , wherein the DPF ash restriction module is ...

Method Of Estimating Soot Using A Radio Frequency Sensor

A method of calibrating a soot load estimating function for a diesel particulate filter uses radio frequency attenuation measurement and temperature measurements. The method comprises identifying a minimum mean attenuation value associated with a standard deviation that exceeds a standard deviation threshold and using this minimum mean attenuation value as a reference value. The method further comprises using a data library that contains gradient values for each of a range of possible temperature values to obtain a first gradient value, the first gradient value corresponding to the first temperature value, wherein each gradient value relates to the gradient of a linear approximation between mean attenuation and soot load at the corresponding temperature. The method involves using the reference value and the first gradient value to determine an axis intercept value for use as an offset value and adopting the offset value as a temperature-independent calibration value for the diesel particulate filter.

Method for operating an exhaust gas aftertreatment, device for controlling an exhaust gas after treatment, exhaust gas aftertreatment and internal combustion engine having exhaust gas after treatment

A method and a device for operating an exhaust gas aftertreatment, wherein a diesel particulate filter is regenerated during the operation, in particular passively regenerated, wherein a corrected differential pressure is calculated from a current differential pressure across the diesel particulate filter at a current exhaust gas volumetric flow rate and with a current correction factor. The current correction factor is determined by determining a lower differential pressure in a predetermined time interval at a defined exhaust gas volumetric flow rate, in particular in a specified exhaust gas volumetric flow rate interval around the defined exhaust gas volumetric flow rate, and comparing the lower differential pressure with a specified current reference value and, depending thereon, calculating a new correction factor or retaining the previous correction factor as the current correction factor.

METHOD AND SYSTEM FOR EXHAUST PARTICULATE MATTER SENSING

Methods and systems are provided for sensing particulate matter by a particulate matter sensor positioned downstream of a diesel particulate filter in an exhaust system. In one example, a method may include accumulating incoming particulate matter by applying a higher bias to a first trap of the particulate matter sensor, and further charging the particulate matter and forming highly charged dendrites. The method further includes capturing the dendrites exiting the first trap by applying a lower bias to a second trap also housed within the same particulate matter sensor, thereby reducing the effects of exhaust flow rate on the particulate matter sensor and further increasing the sensitivity of the particulate matter sensor. 1. A method , comprising: 'measuring charged PM by applying a second voltage only to a second set of electrodes housed within the PM sensor further separated from the first set of electrodes by a distance, the first voltage being higher than the second voltage.', 'collecting and charging particulate matter (PM) in an exhaust entering a PM sensor by applying a first voltage only to a first set of electrodes housed within the PM sensor; and'}2. The method of claim 1 , wherein the charging includes transferring charges from the first set of electrodes to PM collected between the first set of electrodes.3. The method of claim 1 , wherein the measuring includes attracting the charged PM exiting the first set of electrodes towards the second set of electrodes and depositing the charged PM between the second set of electrodes and determining a soot load of the PM sensor based on an amount of charged PM deposited between the second set of electrodes.4. The method of claim 3 , further comprising regenerating the second set of electrodes when the soot load of the PM sensor is higher than a threshold soot load.5. The method of claim 1 , wherein the first set of electrodes further comprise a first positive electrode connected to a positive terminal of a ...

METHOD AND SYSTEM FOR GAS PARTICULATE FILTER

Methods and systems are provided for diagnosing a particulate filter located in an exhaust runner of an engine cylinder. In one example, a method may include flowing exhaust from a first cylinder through a first particulate filter in a first runner, and flowing exhaust from a second cylinder through a second particulate filter in a second runner. The method may further include adjusting engine operation in response to particulate filter degradation, the particulate filter degradation distinguishing between degradation of the first and second particulate filters based on an exhaust pressure pulsation timing relative to combustion events. 1. A method , comprising:flowing exhaust from a first cylinder through a first particulate filter in a first runner;flowing exhaust from a second cylinder through a second particulate filter in a second runner; andadjusting engine operation in response to particulate filter degradation, the particulate filter degradation distinguishing between degradation of the first and second particulate filters based on exhaust pressure pulsation timing relative to combustion events.2. The method of claim 1 , wherein the first exhaust runner and the first particulate filter receive exhaust only from the first cylinder claim 1 , and wherein the adjusting is different depending on the differentiated degradation from among the first and second filters.3. The method of claim 1 , further comprising merging the exhaust from the first and second runners in an exhaust manifold claim 1 , and sensing the exhaust pressure of the merged exhaust.4. The method of claim 1 , wherein adjusting engine operation in response to particulate filter degradation further comprises determining the particulate filter degradation based on a comparison of a measured exhaust pressure amplitude against a threshold.5. The method of claim 4 , wherein the threshold is a first threshold claim 4 , the method further comprising claim 4 , performing a first engine adjustment ...

EXHAUST GAS CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE

An estimated trapped amount (PM) that is an estimated value of an amount of particulate matter that is trapped in a particulate filter arranged in an engine exhaust passage is calculated based on an engine operating state, and PM removal control is performed when the estimated trapped amount exceeds an upper limit amount. Reference temperature increase control is performed to remove the particulate matter from the particulate filter, and an actual temperature that is the temperature of the particulate filter while the reference temperature increase control is being performed is detected. A reference temperature that is the temperature of the particulate filter when it is assumed that the reference temperature increase control has been performed when the amount of particulate matter trapped in the particulate filter is a reference initial trapped amount is stored in advance. The estimated trapped amount is corrected based on the actual temperature and the reference temperature. 1. An exhaust gas control apparatus of an internal combustion engine , the exhaust gas control apparatus comprising:a particulate filter configured to trap particulate matter in exhaust gas that is discharged from the internal combustion engine, the particulate filter being arranged inside an exhaust passage of the internal combustion engine; and i) calculate an estimated trapped amount based on an operating state of the internal combustion engine or a differential pressure before and after the particulate filter, the estimated trapped amount being an estimated value of an amount of the particulate matter, and the particulate matter being trapped in the particulate filter,', 'ii) perform reference temperature increase control that increases a temperature of the particulate filter based on a predetermined reference state in order to remove the particulate matter trapped in the particulate filter,', 'iii) detect an actual temperature that is the temperature of the particulate filter while the ...

METHOD AND CONTROL DEVICE FOR MONITORING THE FUNCTION OF A PARTICULATE FILTER

A method and control device for monitoring the function of a particulate filter in an exhaust gas duct of an internal combustion engine. A soot emission in the exhaust gas duct downstream from the particulate filter is determined with a particle sensor, an expected soot emission after a limit particulate filter at the location of the particle sensor is simulated and a comparison value is ascertained. A good particulate filter is found if the measured soot emission is less than the comparison value of the simulated soot emission. A defective particulate filter is found if the measured soot emission is higher than the comparison value of the simulated soot emission. The simulated soot emission is determined as being a simulated soot particle concentration at the installation site of the particle sensor such that a basic soot concentration in a soot concentration model is corrected at least with an oxygen correction. 11210. A method for monitoring the function of a particulate filter () in an exhaust gas duct () of an internal combustion engine , the method comprising:{'b': 30', '10', '12, 'determining with a particle sensor () a soot emission in the exhaust gas duct () downstream from the particulate filter ();'}{'b': '30', 'simulating an expected soot emission after a limit particulate filter at the location of the particle sensor () and;'}ascertaining a comparison value;wherein a good particulate filter is found if the measured soot emission is less than the comparison value of the simulated soot emission and a defective particulate filter is found if the measured soot emission is higher than the comparison value of the simulated soot emission;{'b': 30', '101', '100', '103, 'wherein the simulated soot emission is determined as being a simulated soot particle concentration at the installation site of the particle sensor () in such a way that a basic soot concentration () in a soot concentration model () is corrected at least with an oxygen correction ().'}23030. The ...

METHODS FOR MITIGATING OVER-TEMPERATURE DURING AN EXHAUST GAS SYSTEM PARTICULATE FILTER DEVICE REGENERATION

Methods for mitigating over-temperature during an exhaust gas system particulate filter device regeneration are provided. The exhaust gas system can include an exhaust gas stream supplied by an exhaust gas source to a particulate filter device through an exhaust gas conduit. The methods can include detecting an over-temperature during a particulate filter regeneration, initiating one or more first mitigation strategies, and shutting down the exhaust gas source. The one or more first mitigation strategies can include inhibiting the particulate filter device regeneration, altering the exhaust gas source operating parameters, and activating a cooling fan. The exhaust gas source can include an internal combustion engine configured to power a vehicle, and the operating parameters can be altered by a torque limiter. 1. A method for mitigating over-temperature during an exhaust gas system particulate filter device regeneration , wherein the exhaust gas system includes an exhaust gas stream supplied by an exhaust gas source to a particulate filter device through an exhaust gas conduit , the method comprising:detecting an over-temperature during a particulate filter regeneration;initiating one or more first mitigation strategies, wherein the one or more first mitigation strategies include inhibiting the particulate filter device regeneration, altering the exhaust gas source operating parameters, and activating a cooling fan; andshutting down the exhaust gas source.2. The method of claim 1 , wherein the over-temperature is determined based on the temperature of the particulate filter device.3. The method of claim 1 , wherein the over-temperature is determined based on the temperature of a temperature-sensitive device proximate the exhaust gas system.4. The method of claim 3 , wherein the temperature-sensitive device comprises one or more of an anti-lock brake module.5. The method of claim 1 , wherein the exhaust gas source comprises an internal combustion engine configured to ...

Exhaust gas purification apparatus for an internal combustion engine

A reduction in the accuracy of a failure determination of a filter due to a reduction in the detection accuracy of a PM sensor is suppressed. To this end, provision is made for an NOx selective reduction catalyst arranged in an exhaust passage of the internal combustion engine to reduce NOx by means of a reducing agent supplied thereto, a supply device to supply urea water as the reducing agent from an upstream side of the NOx selective reduction catalyst, a PM sensor to detect an amount of particulate matter in an exhaust gas at the downstream side of the NOx selective reduction catalyst, and a control unit to make an amount of production of intermediate products from the urea water supplied from the supply device to ammonia smaller when an amount of particulate matter is detected by the PM sensor than when not detected.

Particulate filter fault diagnosis method and device

Arranged downstream of a particulate matter filter incorporated in an exhaust pipe is a PM sensor with a detection portion on which particulate matter is deposited to output a deposition amount of the particulate matter. An assumption condition is set for making an assumption that the particulate matter filter is in a reference condition having a predetermined particulate matter capturing capability. Under the assumption condition, a virtual output value is calculated depending on a virtual deposition amount of the particulate matter in the PM sensor. The particulate matter filter is determined to have fault when, upon reaching of the virtual output value to a predetermined determination threshold, an output of the PM sensor is not less than the determination threshold.

SENSOR

The PM sensor includes: a filter member having a plurality of measuring cells which are defined by a porous partition wall and configured to trap particulate matters in exhaust gas; at least a pair of electrode members which are disposed to face each other with the measuring cell sandwiched therebetween to form a condenser; a heater member which heats the measuring cell to burn and remove particulate matters accumulated in the measuring cell; and an estimation unit which estimates an amount of the particulate matters contained in the exhaust gas based on an electrostatic capacity between the pair of electrode members 1. A sensor comprising:a filter member having a plurality of cells which are defined by a porous partition wall and configured to trap particulate matters in exhaust gas;at least a pair of electrode members which are disposed to face each other with the cell sandwiched therebetween to form a condenser;a heater member which heats the cell to burn and remove particulate matters accumulated in the cell; andan estimation unit which estimates an amount of the particulate matters contained in the exhaust gas based on an electrostatic capacity between the pair of electrode members.2. The sensor according to claim 1 ,wherein the heater member is a heating wire which is inserted into the cell and which is energized to be heated.3. The sensor according to claim 1 ,wherein the filter member is a filter layer in which the plurality of cells are disposed in parallel in one direction,wherein the pair of electrode members are first and second planar electrode plates which are disposed to face each other with the filter layer sandwiched therebetween,wherein the heater member is a planar heater substrate which is energized to be heated, andwherein the heater substrate is interposed either between the first electrode plate and the filter layer or between the second electrode plate and the filter layer.4. The sensor according to claim 1 , further comprising:a filter ...

Method for Assessing a Condition of a Particulate Filter and Exhaust System for a Motor Vehicle

In a method for assessing a condition of a particulate filter for use in an internal combustion engine of a motor vehicle, a difference between a pressure exerted on the input side of the particulate filter and a pressure exerted on the output side of the particulate filter is recorded by a differential pressure sensor. The difference in pressure is taken into account when assessing the condition. Furthermore, the pressure exerted on the output side of the particulate filter in relation to the atmospheric pressure is recorded by a relative pressure sensor. When assessing the condition of the particulate filter, the pressure recorded by the relative pressure sensor is also taken into account. A frequency of changes in pressure and/or an amplitude load of the pressure is assessed. The invention also relates to an exhaust system for a motor vehicle. 110-. (canceled)11. A method for assessing a condition of a particulate filter for an internal combustion engine of a motor vehicle , in which , by way of a differential pressure sensor , a difference between a pressure exerted on an input side of the particulate filter and a pressure exerted on an output side of the particulate filter is recorded , and in which the difference in pressure is taken into account when assessing the condition , comprising:recording, by means of a relative pressure sensor, the pressure exerted on the output side of the particulate filter in relation to an ambient pressure, and, when assessing the condition of the particulate filter, taking the pressure recorded by means of the relative pressure sensor into account,observing a temporal variation in pressure recorded by means of the differential pressure sensor and a temporal variation in relative pressure recorded by means of the relative pressure sensor, andassessing conclusions to be made about the condition of the particulate filter and at least one of a frequency of changes in pressure and an amplitude load of pressure from the temporal ...

DIAGNOSTIC SYSTEM FOR INTERNAL COMBUSTION ENGINE

A diagnostic system for an internal combustion engine is disclosed. The diagnostic system may include an electronic control unit. The electronic control unit may determine whether a predetermined condition is satisfied. The predetermined condition may be a condition under which an amount of particulate matter that separates from a filter is larger than or equal to a predetermined separation amount as a urea water-originated deposit once accumulated in the filter separates in gaseous form. When the electronic control unit determines that the predetermined condition is satisfied, the electronic control unit may not execute a diagnosis of a malfunction in the filter based on a filter differential pressure until a predetermined period elapses from the point in time at which it is determined that the predetermined condition is satisfied. 3. The diagnostic system according to claim 1 , whereinthe predetermined condition is a condition that a temperature of the filter is higher than or equal to a predetermined temperature and the first estimated amount is larger than or equal to a first predetermined amount, andthe electronic control unit is configured to set at least one of the predetermined temperature and the first predetermined amount, the predetermined temperature being set such that the predetermined temperature when the first estimated amount is large is lower than the predetermined temperature when the first estimated amount is small, and the first predetermined amount being set such that the first predetermined amount when the first estimated amount is large is smaller than the first predetermined amount when the first estimated amount is small.4. The diagnostic system according to claim 3 , whereinthe electronic control unit is configured to calculate a second estimated amount, the second estimated amount being an estimated amount of urea water-originated deposit accumulated in the filter, andthe electronic control unit is configured to set at least one of the ...

TECHNIQUE AND METHOD TO MEASURE AND CALCULATE PARTICULATES OUTPUT FROM GASOLINE ENGINES

A method to determine soot mass of a gasoline engine powered automobile vehicle includes: predefining a time period between approximately 50 seconds to 200 seconds defining a cold start operation of a gasoline engine; determining a critical engine cold start temperature at a time defining a start of the cold start operation; identifying a cold start soot mass value from a lookup table based on the predefined time period and the critical engine cold start temperature; calculating a hot engine soot mass value for a hot engine operating time; repeating the calculating step for at least one next successive hot engine operating time; and adding the cold start soot mass value to the hot engine soot mass value for the hot engine operating time and the at least one next successive hot engine operating time to define a total soot mass value. 1. A method to determine soot mass of a gasoline engine powered automobile vehicle , comprising:predefining a time period for a cold start operation of an engine;determining an engine cold start critical temperature at a time defining start of the cold start operation;identifying a cold start soot mass value from a lookup table based on the predefined time period and the engine cold start critical temperature;calculating a hot engine soot mass value for at least one operating time period after an end of the time defining the start of the cold start operation and before a time of engine shutoff; andadding the cold start soot mass value to the hot engine soot mass value to define a total soot mass value.2. The method to determine soot mass of a gasoline engine powered automobile vehicle of claim 1 , further including identifying a set of driving conditions ranging between a steady state and an aggressive state.3. The method to determine soot mass of a gasoline engine powered automobile vehicle of claim 2 , further including determining an aggressiveness factor C_ags for each of the driving conditions in the set of driving conditions ...

ASPIRATION SYSTEM FOR A WORK VEHICLE INCLUDING AN ADJUSTABLY-SIZED VENTURI SECTION

In one aspect, an aspiration system for a work vehicle includes an exhaust tube extending along a flow direction from an upstream end to a downstream end. The exhaust tube defines an exhaust passage extending from the upstream end of the exhaust tube to the downstream end of the exhaust tube. The exhaust tube includes a venturi portion. The aspiration system also includes an aspiration tube in flow communication with the venturi portion and configured to receive an aspirated airflow. The system further includes a flow adjustment mechanism provided in operative association with venturi portion such that the flow adjustment mechanism is configured to adjust a cross-sectional flow area of the venturi portion of the exhaust tube. 1. An aspiration system for a work vehicle , the aspiration system comprising:an exhaust tube extending along a flow direction from an upstream end to a downstream end, the exhaust tube defining an exhaust passage extending from the upstream end of the exhaust tube to the downstream end of the exhaust tube, the exhaust tube including a venturi portion;an aspiration tube in flow communication with the venturi portion and configured to receive an aspirated airflow; anda flow adjustment mechanism provided in operative association with venturi portion such that the flow adjustment mechanism is configured to adjust a cross-sectional flow area of the venturi portion of the exhaust tube.2. The aspiration system of claim 1 , wherein the aspiration tube is configured to receive the aspirated airflow from an air filtration system of the work vehicle claim 1 , the aspiration tube defining an aspiration passage extending between the air filtration system and the venturi portion of the exhaust tube.3. The aspiration system of claim 1 , wherein an outlet end of the aspiration tube is placed in association with the venturi portion of the exhaust tube such that an exhaust gas flowing through the venturi portion generates the aspirated airflow through the ...

METHOD OF AGEING A COMPONENT OF AN EXHAUST AFTER TREATMENT SYSTEM

A method of ageing a component of an exhaust gas after-treatment system including the steps of combusting fuel to subject the component to a continuous thermal ageing and simultaneously target loading at least certain sections of the component with ash. The method can be used on a test bench. 1. A method for ageing a component of an exhaust gas after-treatment system , comprising the steps of 1:subjecting a component to a continuous thermal ageing process by means of combustion of a fuel, and targeted loading of at least certain sections of the component with ash at the same time.2. The method of claim 1 , wherein feeding an ash former to non-burnt fuel claim 1 , or burning an ash former in the burner which is provided for the combustion of the fuel claim 1 , or feeding ash to the exhaust gas which is produced by burning the fuel.3. The method according to claim 1 , wherein the continuous thermal ageing takes place at a temperature of at least 750° C.4. The method of claim 1 , wherein the loading with ash takes place continuously or discontinuously.5. The method of claim 1 , wherein the targeted loading is predefined and the loading with ash is carried out in accordance with the targeted loading to be achieved.6. The method according to claim 1 , wherein for the loading with ash claim 1 , consumption of the ash former is predefined over an ageing time.7. The method of claim 1 , wherein a duration for the loading with ash and a duration for the continuous thermal ageing are virtually identical.8. The method of claim 1 , wherein during the method the actual loading of the component with ash is determined claim 1 , is compared with an assumed loading claim 1 , and the loading with ash is adapted on the basis of the result of the comparison.9. The method of claim 1 , wherein the component is a particle filter or a three-way or four-way catalytic converter.10. The method of claim 1 , wherein the fuel is a spark-ignition fuel or a diesel fuel.11. The method of further ...

Filter failure diagnostic device for an internal combustion engine

A device is provided, which makes it possible to perform a failure diagnostics for a filter more accurately even in the case of an internal combustion engine which is constructed to be capable of using both of gaseous fuel and liquid fuel. The device of the invention comprises judging means which judges any failure of the filter by comparing the added-up amount of the particulate matter contained in the exhaust gas as detected by a PM amount detecting sensor during a predetermined period and the added-up amount of the particulate matter contained in the exhaust gas as estimated by PM amount estimating means during the predetermined period, wherein the PM amount estimating means estimates the added-up amount of the particulate matter contained in the exhaust gas on the basis of the predetermined parameter and only a fuel injection amount of the liquid fuel out of a fuel injection amount of the gaseous fuel and the fuel injection amount of the liquid fuel.

METHOD FOR DETERMINING AN ESTIMATED AMOUNT OF SOOT ACCUMULATED IN A PARTICULATE FILTER OF AN EXHAUST GAS AFTER-TREATMENT SYSTEM

A method for estimating the amount of soot accumulated in a particulate filter of a vehicle exhaust gas system is provided. The system may include an engine, an exhaust gas system, having a particulate filter, and a controller configured to execute the present method. The controller may be configured to evaluate an instantaneous volumetric flow rate of an exhaust gas flowing through the exhaust gas system; monitor an exhaust gas pressure drop across the particulate filter; determine a drive state of the vehicle based on the instantaneous volumetric flow rate of exhaust gas and the exhaust gas pressure drop; and execute one of a first control action when the drive state is a steady-state drive state and a second control action when the drive state is a transient-state drive state. 1. A method of determining an estimated amount of soot accumulated in a particulate filter of a vehicle exhaust gas system comprising:evaluating, via a controller, an instantaneous volumetric flow rate of an exhaust gas flowing through the exhaust gas system;monitoring, via a differential pressure module, an exhaust gas pressure drop across the particulate filter and returning a differential pressure output to the controller;determining, via the controller, a drive state of the vehicle based on the instantaneous volumetric flow rate of the exhaust gas and the exhaust gas pressure drop across the particulate filter, wherein the drive state is one of a steady-state drive state and a transient-state drive state; andexecuting, via the controller, one of a first control action when the drive state is the steady-state drive state and a second control action when the drive state is the transient-state drive state.2. The method of wherein monitoring an exhaust gas pressure drop across the particulate filter includes:obtaining, with the differential pressure module, a first pressure reading at an inlet side of the particulate filter, wherein the inlet side of the particulate filter is between the ...

METHOD AND APPARATUS FOR MONITORING A PARTICULATE FILTER

A method for monitoring particulate filter disposed in an exhaust aftertreatment system of an internal combustion engine includes determining, via a differential pressure sensor, a pressure differential across the particulate filter, and determining an initial parameter associated with soot loading on the particulate filter based upon the pressure differential. A first adjustment to the soot loading is determined based upon a passive regeneration effect, a second adjustment to the soot loading is determined based upon an off-engine temperature effect, and a third adjustment to the soot loading is determined based upon occurrence of an interrupted regeneration event. A final parameter associated with soot loading on the particulate filter is determined based upon the initial parameter and the first, second and third adjustments. 1. Method for monitoring a particulate filter disposed in an exhaust aftertreatment system of an internal combustion engine , the method comprising:determining, via a differential pressure sensor in communication with an engine controller, a pressure differential across the particulate filter;determining an initial parameter associated with soot loading on the particulate filter based upon the pressure differential;determining a first adjustment based upon a passive regeneration effect;determining a second adjustment based upon an off-engine temperature effect;determining a third adjustment based upon occurrence of an interrupted regeneration event; anddetermining a final parameter associated with soot loading on the particulate filter based upon the initial parameter and the first, second and third adjustments.2. The method of claim 1 , further comprising controlling claim 1 , via the engine controller claim 1 , a regeneration event for the particulate filter based upon the final parameter associated with soot loading.3. The method of claim 2 , wherein controlling the regeneration event comprises controlling the internal combustion engine to ...

Device for the diagnosis of the operability of a particle filter for an exhaust gas stream of an internal combustion engine

A device for the diagnosis of the operability of a particle filter for an exhaust gas stream of an internal combustion engine, the device comprising: an exhaust conduit having an outer wall, the outer wall of the exhaust conduit defining a virtual bounding tubular envelope, the virtual bounding tubular envelope being the smallest possible tubular envelope having a circular cross-section co-planar to the cross-section of the exhaust conduit and completely surrounding the outer wall of the exhaust conduit at any position along the exhaust conduit, an exhaust chamber having a detection filter, a temperature sensor arranged in the exhaust chamber, the temperature sensor being arranged for measuring the temperature of a portion of the exhaust gas stream having passed through at least a part of the detection filter, wherein at least a portion of the exhaust chamber is thermally connected to the environment exterior to the exhaust conduit, and wherein the exhaust chamber is at least partly arranged within the virtual bounding tubular envelope over the entire length of the exhaust chamber.

METHOD OF CONTROLLING TEMPERATURE OF EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE, AND INTERNAL COMBUSTION ENGINE CONTROL DEVICE

A control unit () calculates a temperature difference (ΔTg). The temperature difference (ΔTg) is a value obtained by subtracting the temperature (Tg) of a GPF () from a target GPF temperature (Tgt). If the temperature difference (ΔTg) is less than or equal to zero, the control unit () implements a fuel economy-oriented conventional control. If the temperature difference (ΔTg) is greater than zero, the control unit () implements a filter temperature-increasing control. The filter temperature-increasing control causes the exhaust temperature to be increased so that the temperature (Tg) of the GPF () becomes greater than or equal to the target GPF temperature (Tgt). 114.-. (canceled)15. An internal combustion engine exhaust purifier temperature control method for an internal combustion engine system in which an exhaust purifier is disposed in an exhaust passage connected to an internal combustion engine , and is structured to purify exhaust gas exhausted from the internal combustion engine , and includes a filter structured to collect exhaust particulate matter contained in the exhaust gas , the internal combustion engine exhaust purifier temperature control method comprising:performing a predetermined exhaust gas temperature increase control to increase temperature of the exhaust gas, in response to a condition that temperature of the filter is lower than or equal to a first preset temperature point; andsetting the first preset temperature point, based on collection efficiency at which the filter collects the exhaust particulate matter.16. The internal combustion engine exhaust purifier temperature control method as claimed in claim 15 , comprising:setting the first preset temperature point lower than a temperature point at which the exhaust particulate matter collected by the filter is burned and removed.17. The internal combustion engine exhaust purifier temperature control method as claimed in claim 15 , comprising:setting the first preset temperature point to a ...

Control apparatus of internal combustion engine

An SCR system ( 8 ) is arranged in an exhaust path ( 4 ) of an internal combustion engine ( 2 ) to which the invention is applied, and a particulate filter ( 14 ) is arranged downstream thereof. A control apparatus ( 16 ) includes temperature controlling means for controlling a temperature of an element portion of the particulate sensor. The temperature controlling means performs control to increase the temperature of the element portion of the particulate sensor to a first temperature range (T 1 ), when a cumulative value (t) of a time for which the particulate sensor is used in a specific operating state reaches a reference time (t 1 ), after detection of a particulate amount by the particulate sensor has started this time. Here, the specific operating state is an operating state set taking into account an operating state in which urea related substances tend to be discharged to a downstream side of the SCR system ( 8 ). Also, the first temperature range (T 1 ) is a temperature that is higher than a temperature at which the urea related substances decompose, and lower than a temperature at which the particulates are burned off.

Active Control System for Diesel Particulate Filter

An active control system for diesel particulate filter includes a particulate filter unit, at least one sensor, a control unit, and a bypass unit. The sensor is in fluid communication with the particulate filter unit and electrically connected with the control unit so that the sensor is able to communicate with the control unit regarding the pressure and temperature readings of the exhaust gas flow. The bypass unit is in fluid communication with the particulate filter unit while a control valve of the bypass unit is electrically connected with the control unit. The control unit is able to operate the control valve depending upon the pressure and temperature readings of the sensor so that the bypass unit can be activated for the exhaust gas flow, where the bypass unit decreases the particulate matter buildup within the particulate filter unit and eliminates high engine exhaust back pressure. 1. An active control system for diesel particulate filter comprises:a particulate filter unit;at least one pressure sensor;a control unit;a bypass unit;the particulate filter unit comprises a housing, an exhaust inlet, an exhaust outlet, and a diesel particulate filter (DPF);the bypass unit comprises at least one control valve, a diverter duct, and a return duct;the at least one pressure sensor being in fluid communication with the particulate filter unit;the at least one pressure sensor being electrically connected with the control unit;the bypass unit being in fluid communication with the particulate filter unit through the diverter duct and the return duct; andthe at least one bypass unit being electrically connected with the control unit.2. The active control system for diesel particulate filter as claimed in comprises:the exhaust inlet and the exhaust outlet being in fluid communication with the housing;the exhaust inlet and the exhaust outlet being oppositely positioned of each other across the housing;the DPF being internally connected to the housing; andthe DPF being ...

Method of operating an aftertreatment system of an internal combustion engine

A method is disclosed for operating an aftertreatment system having a diesel particulate filter of an internal combustion engine of an automotive system. A regeneration event of the diesel particulate filter is started. The presence of an object ahead of the automotive system is detected. A value of a deceleration that the automotive system should perform in order to avoid a collision with the object is determined. A temperature of the diesel particulate filter is reduced if the value of the deceleration is greater than a first predetermined threshold value.

Operating a Catalytic Converter Device in a Motor Vehicle

Various embodiments may include a method for operating a catalytic converter device comprising: measuring electrical properties of the catalytic converter using high-frequency electromagnetic waves; determining a current operating state of the converter; acquiring reference points associated with the operating state; and checking a calibration of a measuring device. The operating states are selected from: an accumulator is completely emptied; an accumulator is completely filled; an accumulator is partially filled; a component to be stored is put into storage; a component to be stored is removed from storage; and an exhaust gas component to be converted or a quantity of the catalyst material in the exhaust gas which exceeds a threshold value is detected. The component to be stored is selected from the group consisting of: a catalyst material and the exhaust gas component. 1. A method for operating a catalytic converter device in a motor vehicle , wherein the catalytic converter device converts an exhaust gas component , the method comprising:measuring electrical properties of the catalytic converter device by detecting reflection and/or transmission of high-frequency electromagnetic waves emitted into a metallic housing of the catalytic converter device;determining a current operating state of the catalytic converter device;acquiring reference points associated with the determined current operating state;checking a calibration of the measuring device is checked using the reference points; an accumulator of the catalytic converter device is completely emptied of a component to be stored;', 'an accumulator of the catalytic converter device is completely filled with a component to be stored;', 'an accumulator of the catalytic converter device is partially filled with a component to be stored;', 'a component to be stored is put into storage in an accumulator of the catalytic converter device;', 'a component to be stored is removed from storage in an accumulator of the ...

METHOD TO CONTROL THE AMOUNT OF PARTICULATE COMING OUT OF A PARTICULATE FILTER FOR AN INTERNAL COMBUSTION ENGINE

It is described a method to control the amount of particulate coming out of a particulate filter for an internal combustion engine comprising: estimating an objective value of the amount of particulate coming out of the particulate filter; determining an amount of particulate trapped in the particular filter, which allows reaching said objective value of the amount of particulate coming out of the particulate filter; and adjusting an amount of particulate produced by the internal combustion engine and/or an amount of particulate burnt in the particulate filter based on said amount of trapped particulate. 1101. A method to control the amount of particulate ({dot over (m)}) coming out of a particulate filter () for an internal combustion engine () comprising the steps of:{'sub': 'OUT', 'b': '10', 'estimating an objective value of the amount of particulate ({dot over (m)}) coming out of the particulate filter (), which is capable of meeting the legal requirements;'}{'sub': GPF', 'OUT, 'b': 10', '10, 'estimating a trapping efficiency (η) of the particulate filter () based on an estimation model using measured and/or given physical quantities so as to obtain the objective value ({dot over (m)}) of the amount of particulate coming out of the particulate filter ();'}{'sub': GPF', 'GPF, 'b': '10', 'determining an amount of particulate ({dot over (m)}) trapped in the particular filter (), which allows reaching said trapping efficiency (η);'}{'sub': IN', 'B', 'GPF, 'b': 1', '10', '10, 'adjusting an amount of particulate ({dot over (m)}) produced by the internal combustion engine () and flowing into the particulate filter () and/or an amount of particulate ({dot over (m)}) burnt in the particulate filter () so as to obtain said amount ({dot over (m)}) of trapped particulate.'}210. A method according to claim 1 , wherein the step of adjusting the amount of particulate ({dot over (m)}) burnt in the particulate filter () comprises adjusting the engine cut-off phase claim 1 , ...

EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE

An exhaust purification system of an internal combustion engine comprises a filter trapping particulate matter in exhaust gas, a differential pressure sensor detecting a differential pressure before and after the filter or a differential pressure between a pressure in the exhaust passage and an atmospheric pressure, a temperature sensor detecting a temperature of exhaust gas, and a deposition calculating part configured to calculate an amount of particulate matter deposited at the filter. The deposition calculating part is configured to calculate a first estimated value of an amount of the particulate matter based on the differential pressure, calculate a second estimated value of an amount of the particulate matter based on an amount of increase of temperature of the exhaust gas, and calculate an amount of the particulate matter based on the first estimated value and the second estimated value. 1. An exhaust purification system of an internal combustion engine comprising:a filter arranged in an exhaust passage of the internal combustion engine and trapping particulate matter in exhaust gas,a differential pressure sensor detecting a differential pressure before and after the filter or a differential pressure between a pressure in the exhaust passage at an upstream side from the filter and an atmospheric pressure,a temperature sensor arranged in the exhaust passage at a downstream side from the filter and detecting a temperature of exhaust gas flowing out from the filter, anda deposition calculating part configured to calculate an amount of particulate matter deposited at the filter, whereinthe deposition calculating part is configured to calculate a first estimated value of an amount of the particulate matter based on the differential pressure, calculate a second estimated value of an amount of the particulate matter based on an amount of increase of temperature of the exhaust gas due to supply of oxygen to the filter, and calculate an amount of the particulate ...

DIAGNOSTIC DEVICE

A diagnostic device for an exhaust gas purification system that has a diesel oxidation catalyst (DOC), a diesel particulate filter, and an exhaust pipe injection device. The device includes a sensor for detecting a temperature of the DOC, a first calculation unit for converting an integration time of the detected temperature between regeneration intervals into a thermal history time with respect to a predetermined set temperature, and calculating a degree of degradation of the DOC based on this thermal history time, a second calculation unit for calculating a quantity of heat generated in the DOC based on the detected temperature during a forced regeneration execution period, and calculating another degree of degradation of the DOC based on the quantity of heat generated; and a diagnosis unit for diagnosing a degradation state of the DOC based on the degrees of degradation entered from the first and second calculation units. 1. A diagnostic device for use with an exhaust purification system including an oxidation catalyst arranged to oxidize hydrocarbons contained in exhaust gas , a filter arranged downstream of the oxidation catalyst with respect to an gas exhaust flowing direction and configured to collect particulate matter contained in the exhaust gas , and forced regeneration unit configured to perform a forced regeneration of supplying the hydrocarbons to the oxidation catalyst and burning and removing particulate matter accumulated in the filter , the diagnostic device comprising:a first temperature sensor to detect a temperature of the oxidation catalyst;a first degradation degree calculation unit configured to convert a cumulative time of the temperature entered from the first temperature sensor to a thermal history time for a specified set temperature in a period from an end of a forced regeneration to a start of a next forced regeneration, and calculate a first degradation degree of the oxidation catalyst based on the thermal history time;a second ...

CATALYST ASSEMBLY WITH SENSING ADAPTER SYSTEM

A system includes a cylindrical portion coupled to a conically-shaped outlet portion of a three-way catalyst assembly. The cylindrical portion is coupled to the conically shaped outlet portion along a fluid flow path exiting the conically-shaped outlet portion. The cylindrical portion is coupled to a narrower end of the conically-shaped outlet portion. At least one oxygen sensor connection is disposed on the cylindrical portion to enable an oxygen sensor coupled to the at least one oxygen sensor connection to be disposed perpendicular to a longitudinal axis of the cylindrical portion. 1. A catalyst assembly configured to mount along an exhaust flow path of a reciprocating combustion engine , comprising:a housing having an inlet portion, an outlet portion, a central portion disposed between the inlet portion and the outlet portion and configured to house one or more catalyst elements, and a flow path through the inlet portion, the central portion, and the outlet portion, wherein the outlet portion has a first end and a second end, the first end being coupled to the central portion, and the outlet portion comprises a first annular wall having a first diameter that decreases from the first end to the second end;a cylindrical portion coupled to and extending from the second end of the outlet; andat least one oxygen sensor connection disposed on the cylindrical portion to enable an oxygen sensor coupled to the at least one oxygen sensor connection to be disposed perpendicular to a longitudinal axis of the cylindrical portion.2. The catalyst assembly of claim 1 , wherein the first annular wall of the outlet portion comprises a conical wall.3. The catalyst assembly of claim 1 , wherein the central portion has a cross sectional area claim 1 , the at least one oxygen sensor has a second diameter claim 1 , and the ratio of the cross sectional area to the second diameter is 16.4:1 m/m to approximately 65.7:1 m/m.4. The catalyst assembly of claim 1 , comprising the at least one ...

METHOD FOR MONITORING A PARTICULATE FILTER

A diagnostic method for a particulate filter in an exhaust line of an internal combustion engine is presented. The exhaust gas stream downstream of the particulate filter is monitored by a downstream soot sensor having a characteristic sensor cycle; and the accumulation of soot at an upstream soot sensor is monitored over a respective sensor cycle of the downstream soot sensor. The particulate filter operating status is decided on the basis of the information of the downstream and upstream soot sensors. The amount of accumulated soot is determined based on the sensor cycles of the upstream soot sensor, and may be expressed as a soot loading level or as a number of sensor cycles. The efficiency of the particulate filter may be determined from the respective number of sensor cycles of the soot sensors. 1. A method for monitoring a particulate filter arranged in an exhaust line of an internal combustion engine , said method comprising the steps of:monitoring the exhaust gas stream downstream of the particulate filter by means of a downstream soot sensor, said downstream soot sensor having a characteristic sensor cycle during which particulate matter accumulates up to a predetermined threshold;monitoring the accumulation of soot at an upstream soot sensor over a respective sensor cycle of the downstream soot sensor;deciding on the particulate filter operating status based on the information of the downstream and upstream soot sensors.2. The method as claimed in claim 1 , wherein the upstream soot sensor has a characteristic sensor cycle during which particulate matter accumulates up to a predetermined threshold; and the amount of accumulated soot is determined based on the sensor cycles of the upstream soot sensor claim 1 , and expressed as either as a soot loading level or as a number or frequency of sensor cycles.4. The method as claimed in claim 1 , wherein said upstream soot sensor is provided by a virtual sensor model having as input a number of predetermined ...

FAILURE DIAGNOSIS APPARATUS FOR AN EXHAUST GAS PURIFICATION SYSTEM

In a failure diagnosis apparatus that carries out standard diagnosis processing in which a failure of the particulate filter is diagnosed by making a comparison between an output value of the PM sensor at the time when a predetermined period of time has passed from a point in time at which sensor regeneration processing for removing the particulate matter deposited on an insulation layer of the PM sensor has ended, and a predetermined threshold value, the standard diagnosis processing is carried out in the case where rich spike processing according to the in-cylinder rich control is not carried out during the predetermined period of time, whereas the rich spike processing according to the in-cylinder rich control is carried out during the predetermined period of time, the standard diagnosis processing is not carried out. 16.-. (canceled)7. A failure diagnosis apparatus for an exhaust gas purification system , wherein the exhaust gas purification system includes a particulate filter that is disposed in an exhaust passage of an internal combustion engine for trapping particulate matter in exhaust gas; an exhaust gas purification device that is disposed in the exhaust passage of the internal combustion engine for reducing NOx in the exhaust gas by using an unburnt fuel component contained in the exhaust gas; and a supplier that is configured to supply the unburnt fuel component to the exhaust gas purification device thereby to reduce the NOx in the exhaust gas , by carrying out an in-cylinder rich control for changing an air fuel ratio of a mixture to be supplied for combustion in the internal combustion engine into a rich air fuel ratio lower than a stoichiometric air fuel ratio;the failure diagnosis apparatus comprising:a PM sensor that is configured to detect an amount of PM flowing out of the particulate filter, to have a pair of electrodes arranged in opposition to each other through an insulating layer, and to output an electrical signal correlated with a value ...