Patent ID: 6728626
Filing Date: 2004-04-27
Classification: F01L,F02D,Y02T

Abstract:
A multi-cylinder combustion engine, comprising:at least one inlet valve for each cylinder, equipped with respective elastic means of return that push the valve towards a closed position, for controlling the respective inlet port, at least one camshaft for operating each inlet valve of the cylinders of the engine via the respective valve lifters, each inlet valve being controlled by a respective cam of said camshaft, in which each of said valve lifters commands the respective inlet valve against the action of said elastic means of return via the interposition of hydraulic means including a pressurized fluid chamber, the pressurized fluid chamber associated with each inlet valve being suitable for connection via a solenoid valve to an discharge channel for the purpose of decoupling the valve from its respective valve lifter and provoking rapid closure of the valve under the effect of the elastic means of return, and electronic means of control for controlling each solenoid valve to vary the time and opening travel of the respective inlet valve in function of one or more of the engine's operating parameters, wherein the inlet ports controlled by said inlet valves communicate with a single inlet duct in which sensors for detecting the air flow through said inlet duct are situated, and detecting means for detecting the difference in air aspirated by the cylinders of the engine during the respective induction phase and the electronic means of control controlling the time and opening travel of the various cylinders in a differentiated manner for the purpose of minimizing the dispersion detected in the air aspirated by the various cylinder.