Apparatus and method for early intake valve closing
AssigneeDelphi Technologies, Inc.
InventorsMark C. Sellnau, James F. Sinnamon
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AssigneeDelphi Technologies, Inc.
InventorsMark C. Sellnau, James F. Sinnamon
Estimating the term…
A method for early intake valve closing in an internal combustion engine having a crankshaft and at least one exhaust valve, the crankshaft having a top dead center position and a bottom dead center position, includes the step of determining engine operating load conditions and parameters. One of a plurality of predetermined valve lift profiles, each of which correspond to a respective range of engine operating load conditions and parameters, is selected dependent at least in part upon the engine operating load conditions and parameters. The engine is commanded to operate the engine intake valves according to the selected one of the plurality of predetermined valve lift profiles to thereby optimize fuel economy and reduce emissions at light to moderate engine loads, to improve torque and power at relatively full engine loads, and improve cold start engine operation under cold start engine conditions.
An EIVC apparatus for use with an internal combustion engine, said engine having a crankshaft and at least one intake valve, a cam shaft associated with said at least one intake valve, said EIVC apparatus comprising:
A method of early intake valve closing for an internal combustion engine, said engine including a crankshaft and at least one exhaust valve, said crankshaft having a top dead center position and a bottom dead center position, said method comprising the steps of:
Dependencies are inferred from the claim text.