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EFFECTIVE CYLINDER COUNT CONTROL SYSTEMS AND METHODS

  • US 20140069378A1
  • Filed: 03/13/2013
  • Published: 03/13/2014
  • Est. Priority Date: 09/10/2012
  • Status: Active Grant
First Claim
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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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