Patent ID: 7490001
Filing Date: 2009-02-10
Classification: F02D,Y02T

Abstract:
1. Method of controlling the operation of a group of cylinders of an internal combustion engine of the four-stroke, multicylinder type, each of the cylinders of said group cooperating with at least one fuel injector, an intake valve, an exhaust valve, operating members for controlling the opening of the valves according to the development of the cycle and means driven by an engine control computer according to predetermined operating conditions of said engine to activate or deactivate selectively said intake and exhaust valves, wherein the deactivation of said intake and exhaust valves of said cylinders is performed in the course of a same engine cycle at two distinct, adapted times: for the intake valves of said cylinders, at a time coinciding substantially with the middle of the period extending between the theoretical closing time of the intake valve of one of said cylinders and opening time of the intake valve of another of said cylinders; for the exhaust valves of said cylinders, to a time coinciding substantially with the middle of the period extending between the theoretical closing time of the exhaust valve of one of said cylinders and opening time of the exhaust valve of another of said cylinders.