Gm Global Technolgoy Operations, Inc.

Nils Oth

Rafat F Hattar

Alexander Michel

Simon Schiesser

Markus Kraft

Stefan Horst

Alexander Merz

Arnaud Schilly

Bastian Baeck

Florin Korn

An active regeneration method for a gasoline particulate filter includes determining if a particulate filter soot load level is greater than a predetermined soot load level threshold and, if so, determining if the particulate filter's temperature is greater than a predetermined burn off temperature threshold. A particulate filter heating phase is initiated when the particulate filter's temperature is not greater than a predetermined burn off temperature threshold and a soot burning phase is started when the particulate filter's temperature is greater than a predetermined burn off temperature threshold.

Active regeneration method for a gasoline particulate filter of an internal combustion engine

The method determines whether soot loading of a gas particulate filter (GPF) requires regeneration. If it does, the temperature of the GPF is read to determine whether it is sufficiently high to achieve particulate (soot) burning. If it is not, an engine control module is commanded to adjust variables such as spark timing, fuel injection timing and valve timing. If the temperature of the particulate filter is sufficiently high that regeneration can occur, other variables may be adjusted such as leaning the air/fuel mixture, retarding the spark timing, the fuel injection and valve timing. Because the latter adjustments may limit or reduce either engine speed or power, messages in a message center are provided indicating, first, that the driver should continue driving for GPF regeneration and, subsequently, under certain conditions, that the engine power has been reduced. Operation of the motor vehicle proceeds until, based upon sensed conditions or pre-determined experimental or empirical data, the filter has been regenerated.

Gasoline particulate filter regeneration strategy

A method for operating an internal combustion engine is described in which a combustion air ratio (&#x3bb;) is determined and used to determine a deviation of this combustion air ratio from an in particular default or determined set point combustion air ratio. Spontaneous ignition of the internal combustion engine are detected based on the determined deviation (&#x394;&#x3bb;) and used to control the operation of the engine.

Control means and method for operating an internal combustion engine

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Ruesselsheim, Germany

Nils Oth