Ford Global Technolgoies, LLC

Jan Harmsen

Mario Balenovic

Robert Ukropec

Frank Linzen

Helmut Ruhland

Moritz Klaus Springer

Thomas Lorenz

Georg Louven

Matthew Allen Schneider

Maria Armiento

Michiel Jacques Van Nieuwstadt

Dirk Roemer

Christian Nederlof

Yasser Mohamed Sayed Yacoub

Frederik De Smet

Monika Angst

Evgeny Smirnov

Alexey A Dubkov

James Michael Kerns

Ralph Wayne Cunningham

Joerg Kemmerling

Christian Winge Vigild

Brendan Patrick Carberry

Christoph Boerensen

Leonhard Bartsch

Felix Goebel

Steven Maertens

Kim Ford

Alexei Dubkov

Andres Arevalo

James Wright

Javier Castellano

Martina Reichert

Yasser Mohammed Sayed Yacoub

Albert Chigapov

Matthew Schneider

David Jonathan Brook

Methods and systems are provided for adjusting a regeneration scheme in response to ageing of a first catalyst and a second catalyst. In one example, a method may include determining a first ageing of the first catalyst and a second ageing of the second catalyst and updating factors of the regeneration scheme based on the first ageing and the second ageing.

Method for determining regeneration parameter values of a multiple LNT catalyst system, and device for data processing

Methods and systems are provided for an exhaust aftertreatment system. In one example, a system comprises an air injector positioned to inject air between a first catalyst and a second catalyst in response to an oxygen concentration of an exhaust gas falling below a threshold concentration while exhaust gas temperatures are less than a threshold temperature.

Methods and systems for an exhaust gas aftertreatment arrangement

Methods and systems are provided for an exhaust gas arrangement. In one example, a system comprises an air supply device arranged between a first LNT and a second LNT. The air supply device positioned to adjust an air/fuel ratio and a temperature of exhaust gas flowing to the second LNT and devices downstream thereof.

Methods and systems are provided for an exhaust aftertreatment arrangement. In one example, a system includes a LNT upstream of an SCR with an oxygen storage component arranged therebetween, and where a rich operation of an engine is limited based on an oxygen load of the oxygen storage component when an exhaust gas temperature is higher than a limit temperature.

Methods and systems for an exhaust gas treatment arrangement

Methods and systems are provided for a motor vehicle engine, a supply air system including an electrically heated exhaust gas aftertreatment device arranged in the exhaust system, an electric turbocharger including an exhaust turbine and an intake compressor. In one example, the exhaust gas aftertreatment device may be heated and the electric turbocharger may be simultaneously operated to expedite attainment of aftertreatment device light-off while maintaining emissions quality.

Methods and systems for catalyst heating

Methods and systems are provided for an exhaust gas arrangement. In one example, a system includes a lean-NOtrap arranged upstream of a selective-catalytic reduction device with an air supply device positioned to inject air therebetween, wherein the air supply device is activated in response to an exhaust gas being rich and an exhaust gas temperature exceeding a limit temperature.

The present disclosure provides a method for operating an exhaust gas aftertreatment device for cleaning an exhaust gas flow of a motor vehicle with an internal combustion engine operated in normal mode with oxygen surplus. An oxygen store arranged downstream of an NOx storage catalyst of the exhaust gas aftertreatment device receives oxygen in normal mode, and during a regeneration mode emits oxygen for converting breakthrough hydrocarbons and/or carbon monoxide. The oxygen store is assigned to a particulate filter and/or an oxidation catalyst of the exhaust gas aftertreatment device. The particulate filter and/or the oxidation catalyst is arranged downstream of the NOx storage catalyst.

Method for operating an exhaust gas aftertreatment device of a motor vehicle

A method is provided for controlling a NOx storage catalytic converter that is disposed in the exhaust system of an internal combustion engine of a motor vehicle with an adaptive cruise control system, wherein regeneration of the NOx storage catalytic converter is started depending on the distance to a vehicle ahead. For this the motor vehicle is accelerated in a rich mode for regeneration if the distance to the vehicle ahead is large enough so that the regeneration will be completed during an acceleration phase in which the distance is reduced.

LNT control with adaptive cruise control

An operating method for a motor vehicle having a hybrid drivetrain includes, during a demand check, comparing at least one value which characterizes a current state of an exhaust-gas after-treatment device, with a setpoint value of the exhaust-gas after-treatment device. In response to the comparison indicating a deviation of the value characterizing the current state of the exhaust-gas after-treatment device from the setpoint value, a demand for a measure is indicated. The measure includes supplying charge gas, which includes recirculated exhaust gas, to the internal combustion engine during overrun operation. In addition, a capability check is carried out to detect conditions suitable for implementing the operating method.

Methods relating to exhaust after-treatment devices

A method for operating an exhaust-gas aftertreatment system arrangement is provided. The method includes in a first operating state, flowing a substantial majority of an exhaust-gas stream from the internal combustion engine through a first NOstorage catalytic converter positioned in a main exhaust branch of an exhaust aftertreatment system arrangement and in a second operating state, flowing a substantial majority of the exhaust-gas stream through a first bypass branch branching off from the main exhaust branch upstream of the first NOstorage catalytic converter and which opens into the main exhaust branch downstream of the first NOstorage catalytic converter and regenerating the first NOstorage catalytic converter.

Arrangement for exhaust-gas aftertreatment system for an internal combustion engine and method for operating the exhaust-gas aftertreatment system arrangement

A method for operating an internal combustion engine having a lean NOx trap connected downstream is provided. The method comprises in a normal operating mode, operating the internal combustion engine with a lean fuel/air mixture, and in a special operating mode, operating the internal combustion engine with a rich fuel/air mixture in order to bring about regeneration of the lean NOx trap, wherein a changeover from the normal operating mode to the special operating mode takes place when switching off of the internal combustion engine is expected.

Method for operating an internal combustion engine, method for switching off an internal combustion engine and engine control device

A regeneration method () for regenerating an adsorber (), connected downstream of an internal combustion engine (), of a motor vehicle () with a hybrid drive train is described. The internal combustion engine () is operated in a phase of rich combustion for regeneration of the adsorber (). According to the description, an engine load () and/or an engine rotational speed () of the internal combustion engine () for the rich combustion is influenced by means of an electric machine () which can be coupled mechanically to the internal combustion engine ().

Regeneration method and motor vehicle

A method, comprising purging a storage catalytic converter of stored NOx by diverting only a portion of incoming exhaust flow around the catalytic device while increasing injection of reductant to the storage catalytic converter; and responsive to the diverting, adjusting injection of an ammonia-containing fluid into recombined exhaust flow upstream of an SCR catalytic converter. Bypass of the storage catalytic converter reduces available oxygen and air flow through the storage catalytic converter, providing a more advantageous environment for reduction of NOin the storage catalytic converter.

Internal combustion engine with exhaust-gas aftertreatment arrangement and method for operating an internal combustion engine of said type

An exhaust-gas aftertreatment system () for a motor vehicle having a turbocharged internal combustion engine () comprises a large-volume lean NOx trap () which is connected by means of a short connecting pipe () to an outlet of the turbocharger (), wherein the lean NOx trap () has a first region () for the storage and/or reduction of NOx and oxidation of NO to form NO2 and/or reduction of hydrocarbon and/or carbon monoxide in the exhaust gas, and a downstream second region () for the storage and/or reduction of nitrogen oxides in the exhaust gas.

Exhaust-gas aftertreatment system and method for exhaust-gas aftertreatment

Embodiments for reducing ammonia slip are provided. In one example, a method for reduction of ammonia emissions from an engine exhaust gas aftertreatment device with an SCR catalyst comprises determining a concentration of NOx and/or ammonia in the exhaust gas aftertreatment device, comparing a determined value of NOx and/or ammonia concentration with a nominal value for NOx and ammonia, respectively, and if an actual or shortly forecasted ammonia concentration is above the respective nominal value, triggering engine conditions with higher exhaust NOx concentration. In this way, ammonia slip may be reduced without degrading fuel economy.

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Simpelveld, Netherlands

Jan Harmsen