METHOD TO OPTIMIZE FUEL ECONOMY BY PREVENTING CYLINDER DEACTIVATION BUSYNESS
First Claim
Patent Images
1. 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.
12 Assignments
0 Petitions
Accused Products
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.
-
Citations
20 Claims
-
1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. 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. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
Specification