公开(公告)号：US09903283B1

公开(公告)日：2018-02-27

申请号：US15245652

申请日：2016-08-24

Applicant: GM Global Technology Operations LLC

Inventor： Allen B. Rayl, Jr. ,  Donovan L. Dibble ,  Darrell W. Burleigh ,  Steven J. Haase

IPC: F02D17/02 ,  F02D41/14 ,  F02D41/26 ,  F02D41/00

CPC classification number: F02D17/02 ,  F02D41/0002 ,  F02D41/1406 ,  F02D41/26 ,  F02D2200/1004 ,  F02D2700/02 ,  F02D2700/05

Abstract: A method for operating an internal combustion engine includes providing a vehicle having an internal combustion gasoline engine including multiple cylinders and wherein the engine is capable of running on at least one of a plurality firing fractions, providing a vacuum offset (Offsetvac) to adjust airflow capacity for each of the plurality of firing fractions, determining a torque capacity of each of the plurality firing fractions and a plurality of available firing fractions that provides at least enough torque capacity to accommodate a current torque requested (Treq), determining a plurality of viable firing fractions of the plurality of available firing fractions, and determining and implementing an optimal firing fraction of the viable firing fractions if the optimal firing fraction provides enough fuel economy benefit over a current firing fraction.

公开(公告)号：US20180058345A1

公开(公告)日：2018-03-01

申请号：US15245652

申请日：2016-08-24

Applicant: GM Global Technology Operations LLC

Inventor： Allen B. Rayl ,  Donovan L. Dibble ,  Darrell W. Burleigh ,  Steven J. Haase

IPC: F02D17/02 ,  F02D41/26 ,  F02D41/00

CPC classification number: F02D17/02 ,  F02D41/0002 ,  F02D41/1406 ,  F02D41/26 ,  F02D2200/1004 ,  F02D2700/02 ,  F02D2700/05

Abstract: A method for operating an internal combustion engine includes providing a vehicle having an internal combustion gasoline engine including multiple cylinders and wherein the engine is capable of running on at least one of a plurality firing fractions, providing a vacuum offset (Offsetvac) to adjust airflow capacity for each of the plurality of firing fractions, determining a torque capacity of each of the plurality firing fractions and a plurality of available firing fractions that provides at least enough torque capacity to accommodate a current torque requested (Treq), determining a plurality of viable firing fractions of the plurality of available firing fractions, and determining and implementing an optimal firing fraction of the viable firing fractions if the optimal firing fraction provides enough fuel economy benefit over a current firing fraction.