OVER TEMPERATURE / PRESSURE SAFETY DEVICE AND METHOD FOR DIESEL PARTICULATE FILTERS

摘要

A safety device for an exhaust gas aftertreatment system provides an alternative exhaust route in case of high temperatures or pressures within the regenerating particulate filter of the exhaust gas aftertreatment system that may cause damage to the particulate filter. The safety device comprises a valve that redirects the flow of exhaust gas from the regenerating particulate filter when specified temperature or pressure thresholds are met or exceeded.

主权项

1. A method for controlling an exhaust gas aftertreatment system comprising:
determining whether a maximum safe level of particulate loading on a particulate filter of the exhaust gas aftertreatment system has been reached; determining whether a pre-set time limit has been reached; activating a safety device configured to redirect a flow exhaust gas from the particulate filter of the exhaust gas aftertreatment system if the maximum safe level of particulate loading has been reached; and activating the safety device configured to redirect the flow of exhaust gas from the particulate filter of the exhaust gas aftertreatment system if the pre-set time limit has been reached.