The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2014
Filed:
Jan. 10, 2013
C.r.f. Societa Consortile Per Azioni, Orbassano, IT;
Claudio Lanfranco, Orbassano, IT;
Mitzi Puccio, Orbassano, IT;
C.R.F. Societa Consortile per Azioni, Orbassano (Torino), IT;
Abstract
A method controls a valve-control system for variable-lift actuation of the valves of an internal-combustion engine, in which the valve-control system includes, for each cylinder of the engine, a solenoid valve for controlling the flow of a hydraulic fluid in the system, and designed manner for determining a real temperature value of the hydraulic fluid. The method includes determining a deviation of performance of the solenoid valves due to a degradation of the characteristics of the hydraulic fluid with respect to nominal values thereof, and substituting for the real temperature value an equivalent temperature value consisting of a temperature value at which the hydraulic fluid having nominal characteristics would produce performance of the solenoid valves corresponding to the performance resulting from the deviation so that each solenoid valve is governed as a function of the equivalent temperature value.