Reducing HC collection in a diesel particulate filter during failure in an engine cold start aid

摘要

An engine ( 10 ) and a method of operating it during cold start and ensuing running using a cold start aid such as a glow plug control ( 24 ) and glow plugs ( 22 ). The control ( 24 ) monitors all glow plugs to distinguish between one that is effective and one that is ineffective. When a glow plug is disclosed to be ineffective, the engine control system ( 14 ) reduces the quantity of fuel introduced into the respective combustion chamber ( 12 ) in comparison to the quantity of fuel that would be introduced were the respective glow plug effective. This is beneficial in keeping the collection of hydrocarbons of surfaces of a diesel particulate filter ( 20 ) from increasing due to an ineffective glow plug.