METHOD AND APPARATUS FOR CONTROLLING OPERATION OF AN INTERNAL COMBUSTION ENGINE OPERATING IN HCCI COMBUSTION MODE

摘要

An internal combustion engine is configured to operate in a homogeneous-charge compression-ignition combustion mode and a spark-ignition combustion mode employing late intake valve closing. A method for operating the internal combustion engine includes determining an amount of residual gas re-inducted into a combustion chamber from a previous engine cycle and determining an amount of fresh air trapped in the combustion chamber for the present engine cycle based upon the amount of residual gas re-inducted into the combustion chamber from the previous engine cycle. Engine fueling to the cylinder for the present engine cycle is controlled based upon the amount of fresh air trapped in the combustion chamber for the present engine cycle.

主权项

1. A method for operating an internal combustion engine during a transition between operating in a homogeneous charge combustion mode and operating in a spark-ignition combustion mode employing late intake valve closing, comprising:
determining an amount of residual gas re-inducted into a combustion chamber from a previous engine cycle; determining an amount of fresh air trapped in the combustion chamber for the present engine cycle based upon the amount of residual gas re-inducted into the combustion chamber from the previous engine cycle; and controlling, by a controller, engine fueling to the cylinder for the present engine cycle based upon the amount of fresh air trapped in the combustion chamber for the present engine cycle.