Patent ID: 6874463
Filing Date: 2005-04-05
Classification: F02B,F02D,Y02T

Abstract:
1. An engine equipped for deactivation and reactivation of a select number of cylinders by selectively deactivating opening of intake and exhaust valves of cylinder groups intended to be deactivated, the engine comprising: separate air intake throttles including at least one throttle for each cylinder group to be selectively deactivated and at least throttle one for each cylinder group intended to remain activated; and a control for selectively actuating the throttles of the various cylinder groups, the control being operative during cylinder deactivation to actuate the throttles, prior to deactivation of the valves of a cylinder group to be deactivated, to smoothly transfer engine torque load from the cylinder group to be deactivated to a cylinder group to remain activated by concurrently and progressively closing the at least one throttle of a group of cylinders to be deactivated and further opening the at least one throttle of a group of cylinders to remain activated.