Patent ID: 6808471
Filing Date: 2004-10-26
Classification: F02D,Y10T

Abstract:
A security apparatus for an electronic fuel control system in an engine of a vehicle, such apparatus comprising:a predetermined number of cylinders of the engine that are configured for activation and deactivation; a throttle of the engine that is configured to provide a throttle increase based at least in part upon a deactivation of one or more of said predetermined number of cylinders; and an electronic controller that is configured to: generate an increase signal for said throttle if less than all the predetermined number of cylinders is requested to be activated; determine whether a number of said predetermined number of cylinders being activated is equal to or less than a selected fraction; start timing with a timer if the number of said predetermined number of cylinders being activated is greater than the selected fraction; and request termination of said increase signal if the time measured by the timer exceeds a predetermined threshold.