EFFECTIVE CYLINDER COUNT CONTROL SYSTEMS AND METHODS
First Claim
1. A cylinder control system comprising:
- a cylinder control module that;
based on a desired average number of activated cylinders per sub-period of a predetermined period including P sub-periods, selects one of N predetermined cylinder activation/deactivation patterns,wherein the one of the N predetermined cylinder activation/deactivation patterns corresponds to Q activated cylinders per sub-period, Q is an integer between zero and a total number of cylinders of an engine, inclusive, P is an integer greater than one, and the desired average number of active cylinders is an integer or non-integer between zero and the total number of cylinders of the engine;
determines an adjusted cylinder activation/deactivation pattern based on the one of the N predetermined cylinder activation/deactivation patterns;
generates a desired cylinder activation/deactivation pattern for the predetermined period using the one of the N predetermined cylinder activation/deactivation patterns during a first number of the P sub-periods and using the adjusted cylinder activation/deactivation pattern during a second number of the P sub-periods;
activates opening of intake and exhaust valves of first ones of the cylinders that are to be activated based on the desired cylinder activation/deactivation pattern; and
deactivates opening of intake and exhaust valves of second ones of the cylinders that are to be deactivated based on the desired cylinder activation/deactivation pattern; and
a fuel control module that provides fuel to the first ones of the cylinders and that disables fueling to the second ones of the cylinders.
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Accused Products
Abstract
Based on a desired average number of activated cylinders per sub-period of a predetermined period including P sub-periods, a cylinder control module selects one of N predetermined cylinder activation/deactivation patterns. The selected cylinder activation/deactivation pattern corresponds to Q activated cylinders per sub-period, Q is an integer between zero and a total number of cylinders of an engine, inclusive, P is an integer greater than one, and the desired average number of active cylinders is a number between zero and the total number of cylinders of the engine. The cylinder control module also determines an adjusted cylinder activation/deactivation pattern based on the selected predetermined cylinder activation/deactivation pattern, generates a desired cylinder activation/deactivation pattern for the predetermined period using the selected predetermined cylinder activation/deactivation pattern during a first number of the P sub-periods and using the adjusted cylinder activation/deactivation pattern during a second number of the P sub-periods.
64 Citations
20 Claims
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1. A cylinder control system comprising:
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a cylinder control module that; based on a desired average number of activated cylinders per sub-period of a predetermined period including P sub-periods, selects one of N predetermined cylinder activation/deactivation patterns, wherein the one of the N predetermined cylinder activation/deactivation patterns corresponds to Q activated cylinders per sub-period, Q is an integer between zero and a total number of cylinders of an engine, inclusive, P is an integer greater than one, and the desired average number of active cylinders is an integer or non-integer between zero and the total number of cylinders of the engine; determines an adjusted cylinder activation/deactivation pattern based on the one of the N predetermined cylinder activation/deactivation patterns; generates a desired cylinder activation/deactivation pattern for the predetermined period using the one of the N predetermined cylinder activation/deactivation patterns during a first number of the P sub-periods and using the adjusted cylinder activation/deactivation pattern during a second number of the P sub-periods; activates opening of intake and exhaust valves of first ones of the cylinders that are to be activated based on the desired cylinder activation/deactivation pattern; and deactivates opening of intake and exhaust valves of second ones of the cylinders that are to be deactivated based on the desired cylinder activation/deactivation pattern; and a fuel control module that provides fuel to the first ones of the cylinders and that disables fueling to the second ones of the cylinders. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A cylinder control method comprising:
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based on a desired average number of activated cylinders per sub-period of a predetermined period including P sub-periods, selecting one of N predetermined cylinder activation/deactivation patterns, wherein the one of the N predetermined cylinder activation/deactivation patterns corresponds to Q activated cylinders per sub-period, Q is an integer between zero and a total number of cylinders of an engine, inclusive, P is an integer greater than one, and the desired average number of active cylinders is an integer or non-integer between zero and the total number of cylinders of the engine; determining an adjusted cylinder activation/deactivation pattern based on the one of the N predetermined cylinder activation/deactivation patterns; generating a desired cylinder activation/deactivation pattern for the predetermined period using the one of the N predetermined cylinder activation/deactivation patterns during a first number of the P sub-periods and using the adjusted cylinder activation/deactivation pattern during a second number of the P sub-periods; activating opening of intake and exhaust valves of first ones of the cylinders that are to be activated based on the desired cylinder activation/deactivation pattern; deactivating opening of intake and exhaust valves of second ones of the cylinders that are to be deactivated based on the desired cylinder activation/deactivation pattern; providing fuel to the first ones of the cylinders; and disabling fueling to the second ones of the cylinders. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification