Method to optimize fuel economy by preventing cylinder deactivation busyness
AssigneeGM Global Technology Operations LLC
InventorsKevin C. Wong, Alfred E. Spitza, Jr., William S Beggs
Life of this patent
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Abstract
A method of transitioning an engine to a cylinder deactivation mode may include determining a ratio of time that the engine is operating in the cylinder deactivation mode for an engine operating condition relative to a total time of engine operation in the operating condition, determining a number of transitions from a full cylinder mode to the cylinder deactivation mode during the operating condition, determining a transition modifier based on the ratio and number, and modifying a transition criterion based on the transition modifier.
Claims20
A method comprising:
- determining a ratio of time that an engine is operating in a cylinder deactivation mode for an engine operating condition relative to a total time of engine operation in said operating condition;
- determining a number of transitions from a full cylinder mode to said cylinder deactivation mode during said operating condition;
- determining a transition modifier based on said ratio and said number;
- and
- modifying a transition criterion based on said transition modifier.
A control module comprising:
- a cylinder deactivation evaluation module that determines a ratio of time that an engine is operating in a cylinder deactivation mode during an engine operating condition relative to a total time of engine operation in said operating condition and a number of transitions to said cylinder deactivation mode during said engine operating condition;
- a transition modifier determination module in communication with said cylinder deactivation evaluation module that determines a transition modifier based on said ratio and said number;
- and
- a transition threshold evaluation module in communication with said transition modifier determination module that modifies a transition criterion based on said transition modifier.
Dependencies are inferred from the claim text.