English to French Tech/Engineering Patents A method for controlling a valve control system with variable valve lift of an internal combustion engine by operating a compensation in response to the deviation of the characteristics of a working fluid with respect to nominal conditions

It should be noted that the reference interval in which the average values of deviation in performance of the solenoid valves 11 are recorded is chosen in such a way as to start at an instant of time in which the operating play of the system has already settled.

The experimental evidence shows that the variation of performance due to the modification of the operating play of the solenoid valve undergoes a rather sudden variation in the first instants of life of the engine and then settles on substantially constant values throughout the life of the engine itself.