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System and method for reducing vehicle acceleration during engine transitions

  • US 20070131196A1
  • Filed: 12/08/2005
  • Published: 06/14/2007
  • Est. Priority Date: 12/08/2005
  • Status: Active Grant
First Claim
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1. A method for controlling an engine having multiple cylinders, each with at least one electrically actuated valve, the engine operating in a first mode having a first number of firing cylinders and a second mode having a second number of firing cylinders, the method comprising:

  • transitioning the engine from operating in the first mode to the second mode;

    adjusting at least a valve timing or lift of one of a last cylinder to be fired in said first mode and a first cylinder to be fired in said second mode to temporarily adjust a cylinder torque and thereby reduce vehicle shuffle mode vibration.

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