Patent ID: 7913669
Filing Date: 2011-03-29
Classification: F02D

Abstract:
1. A method for controlling cylinder deactivation in a motor vehicle including an engine having a plurality of cylinders comprising the steps of: establishing a first cylinder mode wherein a first number of cylinders is operated; establishing a second cylinder mode wherein a second number of cylinders is operated; the first number being greater than the second number; receiving information related to a parameter associated with an operating condition of the motor vehicle; comparing the parameter with a first predetermined prohibited range and a second predetermined prohibited range, the first predetermined prohibited range having a first lower limit and a first upper limit greater than the first lower limit, the second predetermined prohibited range having a second lower limit and a second upper limit greater than the second lower limit; the second lower limit being greater than the first upper limit; and prohibiting cylinder deactivation to the second number of cylinders when the parameter is within either the first predetermined prohibited range or the second predetermined prohibited range.