Patent ID: 8733303

Claim:
A method for controlling a valve-control system for variable-lift actuation of the valves of a reciprocating internal-combustion engine, wherein said valve-control system comprises, for each cylinder of said reciprocating internal-combustion engine, a solenoid valve for controlling the flow of a hydraulic fluid in said valve-control system, and further comprises means configured for determining a real temperature value of said hydraulic fluid, the method being characterized in that it comprises the steps of: determining a deviation of performance of the solenoid valves of said reciprocating internal-combustion engine due to a degradation of the characteristics of said hydraulic fluid with respect to nominal values thereof; substituting for said real temperature value an equivalent temperature value consisting of a temperature value at which the hydraulic fluid having nominal characteristics would produce a performance of the solenoid valves corresponding to the performance resulting from the aforesaid deviation so that each solenoid valve is governed as a function of said equivalent temperature value instead of as a function of the real temperature value of the hydraulic fluid.