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US 8,412,443 B2Granted
Engine shutdown control
AssigneeFord Global Technologies, LLC
InventorAlex O'Connor Gibson
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for controlling engine shutdown in a vehicle. One example method includes, after discontinuation of combustion and during engine spin down, reducing cylinder air charge while maintaining intake manifold pressure above a threshold value.
Claims18
A method of controlling engine shutdown from idle to stop in a vehicle, comprising:
- after discontinuation of combustion in all cylinders and during engine spin down from idle to stop, reducing cylinder air charge while maintaining intake manifold pressure at a desired constant pressure.
A method of controlling an engine, comprising:
- in response to a vehicle speed of substantially zero, automatically stopping the engine from idle to stopping combustion in all cylinders, increasing flow restriction into the cylinders while decreasing flow restriction into an engine intake manifold;
- and
- in response to an operator's input before engine stop, but after increasing flow restriction into the cylinders, decreasing flow restriction into the cylinders and increasing cylinder air charge to the cylinders.
Dependencies are inferred from the claim text.