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AssigneeFord Global Technologies, LLC
InventorsChristopher P. Glugla, John Ottavio Michelini
Estimating the term…
A system and method for controlling a variable displacement engine include starting the engine with at least one bank of cylinders deactivated to increase load on at least one other bank of activated cylinders and reduce time required for an engine and/or vehicle component to reach a desired operating temperature. In one embodiment, ignition timing or spark is retarded and air/fuel ratio is biased lean for the activated cylinder bank during and shortly after starting to further reduce the time required for catalyst light off and closed loop operation. During activation of a deactivated bank of cylinders, air/fuel ratio of one or more activated cylinders is biased rich with air/fuel ratio of the deactivated cylinders biased lean. In addition, spark is retarded during activation of the deactivated cylinders to reduce the time necessary for components associated with the deactivated cylinders to reach desired operating temperatures.
A method for controlling an internal combustion engine having a plurality of cylinders, at least some of which are selectively deactivated in a variable displacement operating mode, the method comprising:
A method for controlling an internal combustion engine having a plurality of cylinders, at least some of which are selectively deactivated in a variable displacement operating mode, the method comprising:
A method for controlling an internal combustion engine having a plurality of cylinders, at least some of which are selectively deactivated in a variable displacement operating mode, the method comprising:
A method for controlling an internal combustion engine having a plurality of cylinders, at least some of which are selectively deactivated in a variable displacement operating mode, the method comprising:
A method for controlling a variable displacement internal combustion engine having cylinders grouped into first and second banks with associated separate first and second upstream emission control devices and first and second exhaust gas oxygen sensors and at least a third downstream emission control device, at least one bank being selectively activated and deactivated to provide variable displacement, the method comprising:
A system for controlling an internal combustion engine having at least first and second cylinder banks, at least one of which is selectively deactivated in a variable displacement operating mode, the system comprising:
A computer readable storage medium having stored data representing instructions executable by a computer to control a variable displacement internal combustion engine having cylinders grouped into first and second banks with associated separate first and second upstream emission control devices and first and second exhaust gas oxygen sensors and at least a third downstream emission control device, at least one bank being selectively activated and deactivated to provide variable displacement, the computer readable storage medium comprising:
Dependencies are inferred from the claim text.