Patent ID: 7753029
Filing Date: 2010-07-13
Classification: F01L,F02D,Y02T

Abstract:
1. A multi-cylinder internal combustion engine comprising: an air delivery pipe adapted to convey air to each engine cylinder, at least one intake valve for each cylinder that controls the communication between said pipe and the combustion chamber of the respective cylinder, wherein each intake valve is controlled by actuator means for feeding a determined quantity of air into said combustion chamber, said actuator means being adapted to control the respective intake valve independently from the other cylinders and according to variable actuation modes, wherein said actuator means comprises: return spring means ( at least one camshaft ( wherein each of said valve lifters ( the pressure fluid chamber ( said engine also comprising: injector means for each cylinder adapted to carry out the injection of a determined quantity of fuel into said combustion chamber, electronic control means of the operating conditions of the cylinders adapted to control: said engine being arranged such that during operation the delivery pipe is maintained at a substantially constant pressure and that when the engine is requested to vary from a first mode of operation to a second mode, the above-mentioned electronic control means is adapted to carry out a control sequence in which: