System and method for controlling regeneration within an after-treatment component of a compression-ignition engine

摘要

Method for controlling regeneration within an after-treatment component of an engine comprises receiving an upstream temperature signal, receiving a downstream temperature signal, and calculating a temperature difference based on a difference between the upstream temperature signal and the downstream temperature signal. The temperature difference is compared to a predetermined temperature change limit to determine whether the temperature difference is less than or greater than the predetermined temperature change limit. If the temperature difference is less than the predetermined temperature change limit, an estimate of accumulated particulate matter in the after-treatment component is calculated using a primary soot accumulation model. If the temperature difference is greater than the predetermined temperature change limit, an estimate of accumulated particulate matter in the after-treatment component is calculated using a secondary soot accumulation model. The estimate of accumulated particulate matter in the after-treatment component is compared to a predetermined threshold associated with the after-treatment component.

主权项

1. A method for controlling regeneration within an after-treatment component of an engine, comprising:
receiving an upstream temperature signal representing a temperature of an exhaust stream upstream from the after-treatment component; comparing the upstream temperature to a predetermined temperature threshold to determine whether the upstream temperature is less than or greater than the predetermined temperature threshold; if the upstream temperature is less than the predetermined temperature threshold, calculating an estimate of accumulated particulate matter in the after-treatment component using a primary soot accumulation model, and if the upstream temperature is greater than the predetermined temperature threshold, calculating an estimate of accumulated particulate matter in the after-treatment component using a secondary soot accumulation model; comparing the estimate of accumulated particulate matter in the after-treatment component to a predetermined threshold associated with the after-treatment component; and initiating a remedial action when the estimate of accumulated particulate matter in the after-treatment component exceeds the predetermined threshold; wherein the primary soot accumulation model is configured to produce an estimate of accumulated particulate matter in the after-treatment component based on a first input parameter; wherein the secondary soot accumulation model is configured to produce an estimate of accumulated particulate matter in the after-treatment component based on a second input parameter; and wherein the first input parameter differs from the second input parameter.