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SYSTEM AND METHOD FOR CONTROLLING A FIRING SEQUENCE OF AN ENGINE TO REDUCE VIBRATION WHEN CYLINDERS OF THE ENGINE ARE DEACTIVATED

  • US 20140090624A1
  • Filed: 03/13/2013
  • Published: 04/03/2014
  • Est. Priority Date: 10/03/2012
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a spectral density module that determines a spectral density of engine speed;

    a firing sequence module that;

    selects a first set of M cylinders of an engine to activate based on a driver torque request;

    selects a second set of N cylinders of the engine to deactivate based on the driver torque request;

    selects a firing sequence to activate the first set of M cylinders and to deactivate the second set of N cylinders, wherein the firing sequence specifies whether each cylinder of the engine is active or deactivated; and

    based on the spectral density, adjusts the firing sequence to at least one of;

    adjust which cylinders of the engine are included in the first set and which cylinders of the engine are included in the second set; and

    adjust M and N, wherein M and N are integers greater than or equal to one.

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