Method and apparatus for exhaust gas aftertreatment device warming

摘要

To help meet exhaust gas emissions standards, an internal combustion engine may have an exhaust gas aftertreatment device located in its exhaust gas stream. However, the exhaust gas aftertreatment device may only operate effectively above a minimum threshold temperature. In the present disclosure there is provided a method and apparatus for warming the exhaust gas aftertreatment device and a method and apparatus for controlling when exhaust gas aftertreatment device warming should be initiated and stopped.