System and method for controlling load and combustion in an internal combustion engine by valve actuation according to a multiple lift (multilift) cycle

摘要

An internal-combustion engine is equipped with a system of variable actuation of the intake valves that is controlled electronically for the purpose of imparting on the valves different opening and closing times and different lifts according to the operating conditions of the engine. During one and the same cycle of operation of the engine, the system is able to impart on each intake valve a series of successive cycles of movements of opening and closing within the conventional cycle.