Gm Global Technolgoy Operations, Inc.

Other

Adele De Domenico

Andrea Dutto

Cristian Taibi

Andrea Pannuzzo

Andrea De Filippo

Giorgio Nati

Francesco Siano

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.

Method and apparatus for monitoring a particulate filter

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.

Methods for mitigating over-temperature during an exhaust gas system particulate filter device regeneration

An internal combustion engine includes an aftertreatment device, an injector for injecting fuel into a cylinder and an Electronic Control Unit configured to perform a regeneration process of the aftertreatment device. The regeneration process includes determining a nominal fuel quantity to be injected by an after-injection; monitoring a temperature value of the aftertreatment device; determining a fuel quantity correction value, as a function of a difference between the monitored temperature value and a target temperature value of the aftertreatment device; correcting the nominal fuel quantity value, using the fuel quantity correction value, in order to determine a corrected fuel quantity value; performing a fuel injection cycle including a plurality of after-injections; and injecting the corrected fuel quantity value into the cylinder during one of the after-injections of the cycle.

Internal combustion engine equipped with an aftertreatment device

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Turin, Italy

Adele De Domenico