Gm Global Technolgoy Operations, Inc.

Luisa Cusanno

Claudio Ciaravino

Giovanni Montinaro

Giacomo Latrofa

Fabrizio Ramolivo

Marco Sculto

Matteo Venturini

Barbara Maisola

A system and method for controlling an aftertreatment assembly includes a diesel oxidation catalyst (DOC) device configured to receive an exhaust gas. One or more sensors are configured to obtain respective sensor data relative to the exhaust gas and DOC device. A controller is in communication with the sensors and configured to obtain respective sensor data relative to the exhaust gas. The controller is configured to determine if one or more enabling conditions are met, including reaching a predefined temperature range in the DOC device. A rich event is induced targeting a predetermined range of a lambda value for a predefined maximum time duration. When the rich event has ended, an exotherm index is obtained for an observation window immediately after the rich event. The controller is configured to control operation of the aftertreatment assembly based at least partially on the exotherm index.

Monitoring of diesel oxidation catalyst in aftertreatment assembly

A method and apparatus are disclosed for controlling the operation of an aftertreatment system for a motor vehicle having a Lean NOTrap and a tail pipe for conveying exhaust gasses from the LNT to the external environment. Values are calculated for a NOcontent in the exhaust gasses flowing in the tail pipe and the quantity of NOstored in the LNT. A DeNOrequest index is calculated as a function of these values. A raw threshold value of the DeNOrequest index is calculated as a function of a LNT temperature and of an exhaust gas mass flow. A corrected threshold value of the DeNOrequest index is calculated as a function of the raw threshold value of the DeNOrequest index and of a correction factor. A DeNOregeneration is initiated when the calculated value of the DeNOrequest index is larger than the corrected threshold value.

Method of controlling the operation of an aftertreatment system of a motor vehicle

Growing community of inventors

Turin, Italy

Luisa Cusanno